Objective:To evaluate the therapeutic effect of recombinant bovine basic fibroblast growth factor(rbFGF)eye gel combined with tobramycin-dexamethasone(TOB-Dex)eye drops on dry eye syndrome(DES)after cataract surgery.M...Objective:To evaluate the therapeutic effect of recombinant bovine basic fibroblast growth factor(rbFGF)eye gel combined with tobramycin-dexamethasone(TOB-Dex)eye drops on dry eye syndrome(DES)after cataract surgery.Methods:86 patients with DES after cataract surgery,admitted from November 2021 to November 2023,were randomly divided into groups.The observation group included 43 patients treated with rbFGF eye gel combined with TOB-Dex eye drops.The reference group included 43 patients treated with TOB-Dex eye drops alone.Multiple indicators,including total effective rate and clinical symptom scores,were compared between the two groups.Results:The total effective rate in the observation group was higher than in the reference group(P<0.05).Before treatment,there were no differences in clinical symptom scores,serum factors,or disease severity scores between the two groups(P>0.05).Three weeks after treatment,the observation group had lower clinical symptom scores,serum factors,and disease severity scores compared to the reference group(P<0.05).The adverse reaction rate in the observation group was lower than in the reference group(P<0.05).Conclusion:rbFGF eye gel combined with TOB-Dex eye drops can improve the clinical efficacy for patients with DES after cataract surgery,alleviate disease symptoms,reduce inflammatory responses,and have fewer adverse reactions.展开更多
The distal end of the spinal cord and neuromuscular junction may develop secondary degeneration and damage following spinal cord injury because of the loss of neural connections. In this study, a rat model of spinal c...The distal end of the spinal cord and neuromuscular junction may develop secondary degeneration and damage following spinal cord injury because of the loss of neural connections. In this study, a rat model of spinal cord injury, established using a modified Allen＇s method, was injected with basic fibroblast growth factor solution via subarachnoid catheter. After injection, rats with spinal cord injury displayed higher scores on the Basso, Beattie and Bresnahan locomotor scale. Motor function was also well recovered and hematoxylin-eosin staining showed that spinal glial scar hyperplasia was not apparent. Additionally, anterior tibial muscle fibers slowly, but progressively, atrophied. Immu- nohistochemical staining showed that the absorbance values of calcitonin gene related peptide and acetylcholinesterase in anterior tibial muscle and spinal cord were similar, and injection of basic fi- broblast growth factor increased this absorbance. Results showed that after spinal cord injury, the distal motor neurons and motor endplate degenerated. Changes in calcitonin gene related peptide and acetylcholinesterase in the spinal cord anterior horn motor neurons and motor endplate then occurred that were consistent with this regeneration. Our findings indicate that basic fibroblast growth factor can protect the endplate through gene related peptide and acetylcholinesterase cord. attenuating the decreased expression of calcitonin n anterior horn motor neurons of the injured spinal展开更多
Objective: To evaluate the efficacy and the indication of basic fibroblast growth factor (bFGF) in the treatment of exposure of orbital implants. Design: Retrospective and observational case series. Methods: We review...Objective: To evaluate the efficacy and the indication of basic fibroblast growth factor (bFGF) in the treatment of exposure of orbital implants. Design: Retrospective and observational case series. Methods: We reviewed 41 patients (41 eyes) suffering exposure of orbital implants from Jan. 2000 to June 2006. The study group patients with mild exposure received com-bined treatment with bFGF and antibiotic drops, and while the control group patients with mild exposure were treated with anti-biotic drops only. The study group patients with moderate and severe exposure received combined treatment with bFGF and antibiotic drops, and after 2 months they were subjected to amniotic membrane transplantation, while the control group patients with moderate and severe exposure underwent amniotic membrane transplantation after using antibiotic drops. Observation of the growth of conjunctival epithelium and comparison of the healing rate of the two groups. Results: The healing rates of the mild, moderate and severe exposure study group were 100% and 92.3%. The healing rates of the mild, moderate and severe exposure control group were 55.6% and 66.7% respectively. The difference of the healing rates of the mild exposure study group and the control group was significant (P=0.033). And the difference of the healing rates of the moderate and severe exposure study group and the control group was not significant (P=0.167). Conclusion: bFGF may promote obviously the healing of orbital implant exposure, particularly it can be the first choice for the treatment of mild degree exposure. For the moderate and severe cases, it can be administered before surgical repair to enhance neovascularization and will tend to increase the success rate of surgical repair.展开更多
BACKGROUND： Spleen deficiency in traditional Chinese medicine refers to the functional disorder of spleen, pancreas, intestines, and nervous system in modern medicine. OBJECTIVE; To test whether electro-acupuncture c...BACKGROUND： Spleen deficiency in traditional Chinese medicine refers to the functional disorder of spleen, pancreas, intestines, and nervous system in modern medicine. OBJECTIVE; To test whether electro-acupuncture could alter basic fibroblast growth factor （bFGF） protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats. DESIGN, TIME AND SETTING： The randomized, controlled, in vivo animal experiment was performed at the National LeveI-B Laboratory of Clinical Cell Molecule and Biology in Shenzhen Hospital of Traditional Chinese Medicine, between March and November in 2008. MATERIALS： Reserpine injection was produced by Guangdong Bangmin Pharmaceutical Co. Rhubarb extract granule preparation was produced by Guangdong Yifang Pharmaceutical. Huanqiu Brand sterile acupuncture pin was provided by Suzhou Acupuncture Supplies, China. Huatuo Brand electroacupuncture instrument （type SDZ-II） was purchased from Suzhou Medical Appliance Factory, China. METHODS： A total of 96 male Sprague Dawley rats were randomly assigned to control （n = 32） and induction （n = 64） groups. Spleen deficiency was induced via intraperitoneal injection of reserpine and intragastric administration of rhubarb. The successful models were randomized into two groups： model and electro-acupuncture, with 32 rats in each group. Electro-acupuncture was administered at Zusanfi （ST 36） and Sanyinjiao （SP 6） acupoints using a condensation wave and rarefaction （condensation wave 15 Hz） at a strength of 6-15 V for 20 minutes, once per day. The appearance of a slight shiver in the corresponding locus was taken as the standard. According to electro- acupuncture time points, each group was assigned to four subgroups at 7, 14, 28, and 49 days, respectively, with eight rats in each subgroup. Immunohistochemical staining, image analysis, and reverse-transcription polymerase chain reaction were performed at different time points. MAIN OUTCOME MEASURES： bFGF protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats. RESULTS： After 7 days of electro-acupuncture therapy, bFGF protein and mRNA expression significantly increased compared with the model and control groups （P 〈 0.05）. After 14 days, bFGF protein and mRNA expression decreased until 28 days, where levels were then equal to the model group and greater than the control group （P 〈 0.05）. After 49 days, the above indices remained increased in the electro-acupuncture group compared to the model and control groups （P 〈 0.05）. CONCLUSION： Continuous electro-acupuncture maintained a high level of bFGF protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats.展开更多
This study developed an animal model of surgically wounded submandibular glands （SMGs） and investigated the effects of collagen gel with basic fibroblast growth factor （bFGF） on tissue regeneration of surgically w...This study developed an animal model of surgically wounded submandibular glands （SMGs） and investigated the effects of collagen gel with basic fibroblast growth factor （bFGF） on tissue regeneration of surgically wounded SMGs in vivo. The animal model was produced by creating a surgical wound using a 3-mm diameter biopsy punch in SMGs. The wound was filled with collagen gel with bFGF （bFGF group） or without bFGF （control group）. In the animal model of surgically wounded SMGs, salivary glands without scar tissue around the wound area were observed with smaller areas of collagen gel. Small round and spindle-shape cells invaded the collagen gel in both groups after operation day （AOD） 5, and this invasion dramatically increased at AOD 7. Host tissue completely replaced the collagen gel at AOD 21. The invading immune cells in the group treated with collagen gel with bFGF were positive for vimentin, g-smooth muscle actin （αSMA）, CD49f, c-kit and AQP5 at AOD 7. Similarly, the mRNA expression of vimentin, αSMA, CD49f, keratin 19 and AQP5 was also increased. This study suggests that the use of collagen gels with bFGF improves salivary gland regeneration.展开更多
AIMTo expose rat retinal Müller cells to 530 nm monochromatic light and investigate the influence of varying light illumination times on basic fibroblast growth factor (bFGF) and transforming growth factor...AIMTo expose rat retinal Müller cells to 530 nm monochromatic light and investigate the influence of varying light illumination times on basic fibroblast growth factor (bFGF) and transforming growth factor-β1 (TGF-β1) expression.METHODSThree groups of rat retinal Müller cells cultured in vitro under a 530 nm monochromatic light were divided into 6, 12 and 24h experimental groups, while cells incubated under dark conditions served as the control group. The bFGF and TGF-β1 mRNA expression, protein levels and fluorescence intensity of the Müller cells were analyzed.RESULTSThe bFGF mRNA expression and protein levels were significantly upregulated in Müller cells in all three experimental groups compared with the control group (P<0.05), while that of TGF-β1 was downregulated (P<0.05). Also, bFGF expression was positively correlated, but TGF-β1 expression was negatively correlated with illumination time. The largest changes for both cytokines were seen in the 24h group. The changes in bFGF and TGF-β1 fluorescence intensity were highest in the 24h group, and significant differences were observed among the experimental groups (P<0.05).CONCLUSIONThe expressions of bFGF and TGF-β1 changed in a time-dependent manner in Müller cells exposed to 530 nm monochromatic light with 250 lx illumination intensity. Müller cells might play a role in the development of myopia by increasing bFGF expression or decreasing TGF-β1 expression. Changes in cytokine expression in retinal Müller cells may affect monochromatic light-induced myopia.展开更多
The difference between Noggin and basic fibroblast growth factor for the neural precursor differen- tiation from human embryonic stem cells has not been studied. In this study, 100 tJg/L Noggin or 20 IJg/L basic fibro...The difference between Noggin and basic fibroblast growth factor for the neural precursor differen- tiation from human embryonic stem cells has not been studied. In this study, 100 tJg/L Noggin or 20 IJg/L basic fibroblast growth factor in serum-free neural induction medium was used to differen- tiate human embryonic stem cells H14 into neural precursors using monolayer differentiation. Two weeks after induction, significantly higher numbers of neural rosettes formed in the Noggin-induced group than the basic fibroblast growth factor-induced group, as detected by phase contrast micro- scope. Immunofluorescence staining revealed expression levels of Nestin, [3-111 Tubulin and Sox-1 were higher in the induced cells and reverse-transcription PCR showed induced cells expressed Nestin, Sox-1 and Neurofilament mRNA. Protein and mRNA expression in the Noggin-induced group was increased compared with the basic fibroblast growth factor-induced group. Noggin has a greater effect than basic fibroblast growth factor on the induction of human embryonic stem cell differentiation into neural precursors by monolayer differentiation, as Noggin accelerates and in- creases the differentiation of neural precursors.展开更多
The present study established a mouse model of cerebral infarction by middle cerebral artery occlusion, and monitored the effect of 25 tJg/kg leukemia inhibitory factor and （or） basic fibroblast growth factor admini...The present study established a mouse model of cerebral infarction by middle cerebral artery occlusion, and monitored the effect of 25 tJg/kg leukemia inhibitory factor and （or） basic fibroblast growth factor administration 2 hours after model establishment. Results showed that following administration, the number of endogenous neural stem cells in the infarct area significantly increased, malondialdehyde content in brain tissue homogenates significantly decreased, nitric oxide content, glutathione peroxidase and superoxide dismutase activity significantly elevated, and mouse motor function significantly improved as confirmed by the rotarod and bar grab tests. In particular, the effect of leukemia inhibitory factor in combination with basic fibroblast growth factor was the most significant. Results indicate that leukemia inhibitory factor and basic fibroblast growth factor can improve the microenvironment after cerebral infarction by altering free radical levels, improving the quantity of endogenous neural stem cells, and promoting neurological function of mice with cerebral infarction.展开更多
The expression of basic fibroblast growth factor (bFGF) and fibroblast growth factor receptor-1 (FGFR-1) in human meningiomas and the relationships between their expression and the tumors' histological features an...The expression of basic fibroblast growth factor (bFGF) and fibroblast growth factor receptor-1 (FGFR-1) in human meningiomas and the relationships between their expression and the tumors' histological features and angiogenesis were investigated by means of immunohistochemical technique. The expression of bFGF and FGFR-1 was detected by antibody of bFGF or FGFR-1. The tumors' angiogenesis was evaluated by microvascular density (MVD) and, which was observed by use of CD34-antibody immunohistochemically. The results showed that there were varied degrees of the expression of bFGF and FGFR-1 proteins in meningiomas. The expression was correlated with the tumors' histological characters and angiogenesis. It was concluded that bFGF and FGFR-1 might play important roles in meningiomas' angiogenesis and proliferation. The expression positive rate of bFGF and FGFR-1 may provide an indication of evaluating the histological and malignant degree of the tumor.展开更多
Objectives To observe the effect of basic fibroblast growth factor (bFGF) slow-release microcapsules on angiogenesis in infarcted myocardial regions. Methods.Myocardial infarction was induced in 24 New Zealand rabbits...Objectives To observe the effect of basic fibroblast growth factor (bFGF) slow-release microcapsules on angiogenesis in infarcted myocardial regions. Methods.Myocardial infarction was induced in 24 New Zealand rabbits by ligating the root of left anterior descending coronary artery.Group Ⅰ(n=8) served as control, group Ⅱ(n=8) as a blank microcapsule group, group Ⅲ(n=8, each microcapsule contains 1μg bFGF) as micrpcapsule group.In group Ⅱ and Ⅲ, 5 blank microcapsules or bFGF slow-release microcapsules were implanted into myocardium underneath the epicardium between the left anterior descending coronary artery and left circumflex artery.Infarct size was evaluated by infarcted weight/left ventricle weight ratio and angiogenesis was evaluated by immunohistochemical examinations 5 weeks later. [WT5”BX] Results.As compared with group Ⅰ and Ⅱ, rabbits treated with bFGF slow-release microcapsules showed higher microvessel counts (group Ⅰ3775±450, group Ⅱ3837±498,vs.group Ⅲ 13550±481,P<0001) and less infarcted weight /left ventricle weight (group Ⅰ168%±04%,group Ⅱ167%±05%,vs.group Ⅲ 70%±02%,P<0001). Conclusions.Subepicardial administration of bFGF slow-release microcapsule in the infarcted rabbit model results in effective angiogenesis and reduction in infarct size.展开更多
Summary:The expression of basic fibroblast growth factor (bFGF) in rat liver fibrosis and hepatic stellate cells (HSCs) and the relationship between the expression of bFGF and rat liver fibrogenesis were studied. Sixt...Summary:The expression of basic fibroblast growth factor (bFGF) in rat liver fibrosis and hepatic stellate cells (HSCs) and the relationship between the expression of bFGF and rat liver fibrogenesis were studied. Sixty male SD rats (230-260 g) were divided into 4 groups randomly (the 0 week group, 1 week group, 4 week group and 8 week group). Liver fibrosis was induced by subcutaneous injection of carbon tetrachloride. The sections of rats' liver in each group were tested by Van-Gieson (V-G) staining and immunohistochemistry. The expression of bFGF mRNA was detected by reverse transcription polymerase chain reaction (RT-PCR). HSCs were isolated by the combined methods of collagenase IV perfusion and density gradient centrifugation. The expression of bFGF protein in cultured HSCs was detected by Western blot. Images of immunohistochemistry detection, agarose gel electrophoresis of RT-PCR and SDS-polyacrylamide gel electrophoresis of Western blot were analyzed semiquantitatively by image-analyzing system. The results were analyzed by statistics. The results showed that the fibers were gradually increased in the sections of rat liver with the prolongation of the model induction. At the end of the 8th weeks, liver fibrosis was formed. The expression of bFGF detected by immunohistochemistry showed a similar tendency of gradual increase. At the end of the 8th weeks, the bFGF expression could be observed in many regions in sections and the strongest expression was in interstitial cells including HSCs and some hepatocytes in regions around the portal area and central veins. Also there was moderate expression widely in extracellular matrix (ECM). In RT-PCR detection and Western blot detection of HSCs cultured in vitro, the similar tendency of gradual increase was evident either. It is suggested that bFGF is related with liver fibrosis of rats closely and may be a fibrogenesis factor of liver. bFGF possibly regulates liver fibrogenesis through regulating metabolism of extracellular matrix (ECM) by autocrine and paracrine stimulation.展开更多
Objective To explore a new method for the therapy of avascular necrosis of the femoral head. Method The recombinant plasmid pCD-rbFGF was mixed with collagen and was implanted in the necrotic femoral head. Expression ...Objective To explore a new method for the therapy of avascular necrosis of the femoral head. Method The recombinant plasmid pCD-rbFGF was mixed with collagen and was implanted in the necrotic femoral head. Expression of basic fibroblast growth factor (bFGF) was examined by RT-PCR and immunohistochemical method. Re-pair of the femoral head was observed by histological and histomorphometric analysis. Result Expression of bFGF was detected in the femoral head transfected with bFGF gene, indicating significant increase of angiogenesis 2 weeks after gene transfection and increased new bone formation 8 weeks after gene transfection on histom-orphometric analysis (P< 0.01). Conclusion Transfection of bFGF gene enhances bone tissue angiogenesis. Repair in osteonecrosis would be accelerated accordingly.展开更多
AIM: To investigate the function of basic fibroblast growth factor (bFGF) on cat corneal endothelial cells proliferation. METHODS: Cat corneal endothelial cells were primarily cultured, stimulated with bFGF for differ...AIM: To investigate the function of basic fibroblast growth factor (bFGF) on cat corneal endothelial cells proliferation. METHODS: Cat corneal endothelial cells were primarily cultured, stimulated with bFGF for different period, the proliferation of cells was assayed by modified tertrozalium salt (MTT) method, and the morphologic changes were observed with inverted phase contrast microscope and transmission electron microscope. RESULTS: At 1, 3 and 5 days after bFGF was added to cat corneal endothelial cells, the result of MTT in 490nm showed significant difference than that in control group, and the difference was most significant in 10ng/mL group. CONCLUSION: bFGF can promote proliferation of cat corneal endothelial cells. 10ng/mL is the relatively most effective dose.展开更多
BACKGROUND： Basic fibroblast growth factor （bFGF） exhibits neuroprotective functions, but the possible mechanisms of bFGF on vascular dementia remain unclear. OBJECTIVE： To explore the neuroprotective effects of b...BACKGROUND： Basic fibroblast growth factor （bFGF） exhibits neuroprotective functions, but the possible mechanisms of bFGF on vascular dementia remain unclear. OBJECTIVE： To explore the neuroprotective effects of bFGF on a mouse model of vascular dementia, with focus on oxidative damage. DESIGN, TIME AND SETTING： A randomized, controlled, animal experiment was performed at the Medical College of Beihua University from March to December 2008. MATERIALS： bFGF was purchased from Peprotech, USA. METHODS： A total of 80 healthy, Kunming mice were randomly assigned to control, sham-surgery, model, and bFGF groups. The model and bFGF groups were used to establish vascular dementia models by repetitive cerebral ischemia-reperfusion in a conscious state. In addition, bFGF group mice were intraperitoneally injected with bFGF （100 pg/kg） following model establishment, once a day for 7 consecutive days. MAIN OUTCOME MEASURES： The Morris water maze was used to determine the influence of bFGF on learning and memory abilities in vascular dementia mice. The pathomorphological changes in hippocampal CA1 neurons were observed by Nissl staining. Superoxide dismutase and malondialdehyde changes were analyzed using biochemical analysis methods. Annexin V-FITC/PI-double-labeled flow cytometry was used to detect neuronal apoptosis. RESULTS： Learning and memory functions in model mice significantly decreased, as characterized by prolonged latency and reduced time and number of platform crossings （P 〈 0.01, P 〈 0.05）. Superoxide dismutase activity was significantly reduced, malondialdehyde content was significantly increased （P 〈 0.01）, and hippocampal neuronal apoptosis was increased （P 〈 0.01） following vascular dementia, bFGF increased superoxide dismutase activity, decreased malondialdehyde content, and reduced hippocampal neuronal apoptosis （P 〈 0.01）, which resulted in improved learning and memory in mice with vascular dementia. CONCLUSION： bFGF improved learning and memory deficits in mice with vascular dementia by reducing free radical injury and inhibiting hippocampal neuronal apoptosis.展开更多
BACKGROUND： The Wnt/β-catenin signaling pathway plays an important role in neural development. ,β-catenin is an important component of the Wnt/β-catenin signaling pathway. The Wnt signaling pathway has been shown ...BACKGROUND： The Wnt/β-catenin signaling pathway plays an important role in neural development. ,β-catenin is an important component of the Wnt/β-catenin signaling pathway. The Wnt signaling pathway has been shown to regulate the interaction of neural stem cells with the extracellular matrix. OBJECTIVE： To investigate the effects of basic fibroblast growth factor （bFGF） on β-catenin protein and mRNA expression, and on hippocampal neural stem cell proliferation in a rat model of cerebral ischemia/reperfusion. DESIGN, TIME AND SETTING： A randomized, controlled, neurobiology experiment was performed in Shenyang Medical College between August 2006 and August 2008. MATERIALS： A total of 72 healthy male Wistar rats, aged 3 months, were used in this study. bFGF was provided by Beijing SL Pharmaceutical Co.,Ltd., China. METHODS： Rats were randomly divided into 3 groups： sham-operated, ischemia/reperfusion, and bFGF-treated （n = 24 per group）. Focal cerebral ischemia/reperfusion was induced in rats from the ischemia/reperfusion group and the bFGF-treated group by 2 hour right middle cerebral artery occlusion and 2 hour restoration of blood flow using the suture method. The ischemia/reperfusion and bFGF-treated groups were intraperitoneally administered 500 IU/mL of bFGF, or the same volume of physiological saline, once a day at postoperative days 1 3, and once every 3 days thereafter. Simultaneously, the sham-operated group underwent experimental procedures identical to the ischemia/reperfusion and bFGF-treated groups, with the exception of ischemia/reperfusion induction and drug administration. At 2 hours, 2, 6, 13, and 20 days after ischemiaJreperfusion induction, 50 mg/kg bromodeoxyuridine （BrdU） was administered to each group, twice daily, to label proliferating neural stem cells. MAIN OUTCOME MEASURES： The effects of bFGF on BrdU labeling, and ,8 -catenin mRNA and protein expression, in neural stem cells were examined by immunohistochemistry, Western blot, RT-PCR, and in situ hybridization techniques. RESULTS： In the sham-operated group, only a few BrdU-immunoreactive neural stem cells were found. In the ischemia/reperfusion group, BrdU-immunoreactive cells began to increase from 3 days after ischemia/reperfusion induction, reached a peak level at 7 days, and gradually reduced from 21 days. At 3, 7, 14, and 21 days after ischemia/reperfusion induction, the numbers of BrdU-immunoreactive cells were significantly greater in the bFGF-treated group than in the ischemia/reperfusion group. The sham-operated group exhibited slight expression of β-catenin and β-catenin mRNA. In the ischemia/reperfusion group, the expression of β-catenin and β-catenin mRNA gradually increased with reperfusion time, peaked at 14 days after reperfusion, and gradually decreased thereafter; by 21 days, the expression was markedly lower. Following bFGF injection, the expression of hippocampal BrdU, β-catenin, and β-catenin mRNA had apparently increased in each group. CONCLUSION： bFGF promotes neural stem cell proliferation, and the expression of β-catenin and β-catenin mRNA in the ischemic brain tissue. These findings indicate that bFGF promotion of neural stem cell proliferation may be mediated by Wnt/β-catenin signaling pathway.展开更多
The amino acid at the 119th position of human basic fibroblast growth factor(hbFGF),lysine(K119),is a critical component for its mitogenic activity.However,little is known about the effects of the characteristics of t...The amino acid at the 119th position of human basic fibroblast growth factor(hbFGF),lysine(K119),is a critical component for its mitogenic activity.However,little is known about the effects of the characteristics of this residue including charge on the mitogenic activity of hbFGF.Herein,this basic residue was replaced with neutral glutamine residue and acidic glutamic acid residue to construct mutants hbFGF^(K119Q) and hbFGF^(K119E),respectively.The mutants were produced by BL21(DE3)/pET3c expression system...展开更多
BACKGROUND： cAMP-response element binding protein （CREB） is a key modulator of various signaling pathways. CREB activation initiates a series of intracellular signaling pathways that promote neuronal survival. OBJE...BACKGROUND： cAMP-response element binding protein （CREB） is a key modulator of various signaling pathways. CREB activation initiates a series of intracellular signaling pathways that promote neuronal survival. OBJECTIVE： To investigate the regulatory effects of basic fibroblast growth factor （bFGF） on cerebral neuronal CREB expression following ischemia/reperfusion injury. DESIGN, TIME AND SETTING： An immunohistochemical detection experiment was performed at the Department of Anatomy, Shenyang Medical College, between October 2006 and April 2008. MATERIALS： A total of 60 healthy, adult, Wistar rats were randomly divided into three groups： sham-operated （n =12）, ischemia/reperfusion （n = 24）, and bFGF-treated （n = 24）. Rabbit anti-rat CREB （1： 100） and biotin labeled goat anti-rabbit IgG were purchased from the Wuhan Boster Company, China. MetaMorph-evolution MP5.0-BX51 microscopy imaging system was provided by China Medical University, China. METHODS： Rat models of cerebral ischemia/reperfusion injury were developed using the suture method for right middle cerebral artery occlusion. Two-hour ischemia was followed by reperfusion. Rats from the bFGF-treated and ischemia/reperfusion groups were intraperitoneally administered endogenous bFGF （500 IU/mL, 2 000 IU/kg） or an equal amount of physiological saline. Rats from the sham-operated group underwent a similar surgical procedure, without induction of ischemia/reperfusion injury and drug administration. MAIN OUTCOME MEASURES： After 48-hour reperfusion, hippocampal and parietal cortical neuronal CREB expression was detected by immunohistochemistry, and the absorbance of hippocampal CREB-positive products was determined using MetaMorph-evolutionMP5.0-BX51 microscopy imaging system. RESULTS： The sham-operated group exhibited noticeable CREB expression in hippocampal and parietal cortical neurons. In the ischemia/reperfusion group, the CREB expression was discrete and neurons were poorly arranged. The bFGF-treated group exhibited increased CREB expression and better neuronal arrangement compared with the ischemia/reperfusion group. The mean absorbance of CREB-immunoreactive products in the hippocampus and parietal cortex was significantly higher in the ischemia/reperfusion group than in the sham-operated group （P 〈 0.05）, and significantly higher in the bFGF-treated group than in the ischemia/reperfusion group （P 〈 0.05）. CONCLUSION： bFGF significantly upregulates CREB expression in hippocampal and parietal cortical neurons following ischemia/reperfusion injury.展开更多
AIM： To observe the therapeutic effect of early administration of exogenous Basic fibroblast growth factor （bFGF） on acute edematous pancreatitis （AEP） in rats. METHODS： Thirty male Sprague-Dawley rats were rand...AIM： To observe the therapeutic effect of early administration of exogenous Basic fibroblast growth factor （bFGF） on acute edematous pancreatitis （AEP） in rats. METHODS： Thirty male Sprague-Dawley rats were randomly divided into three （n = 10）： normal control group （group Ⅰ）, AEP group （group Ⅱ） and AEP with bFGF treatment group （group Ⅲ）. AEP was induced by subcutaneous injection of cerulein （5.5 μg/kg and 7.5 μg/kg） at 1 h interval into rats of groups Ⅱ and Ⅲ. Three hours after induction of AEP, 100 μg/kg bFGF was administrated intraperitoneally for 1h to group Ⅲ rats. For test of DNA synthesis in acinar cells, 5-bromo-2＇-deoxyuridine （BrdU） labeling solution was intraperitoneally injected into the rats of groups Ⅱ and Ⅲ 24 h after bFGF treatment. The changes in serum amylase, lipase, pancreatic tissue wet/dry ratio were detected. RESULTS： In bFGF treatment group, there was a significant decrease in the volume of serum amylase, lipase and the pancreatic wet/dry weight ratio（1383.0 ± 94.6 U/L, 194.0 ± 43.6 U/L, 4.32 ± 0.32） compared to AEP group （3464 ± 223,7 U/L, 456 ±68,7 U/L, 6.89 ± 0,47） （P 〈 0.01）, and no significant difference was found between bFGF treatment and control group （1289 ± 94.0 U/L, 171 ± 23.4 U/L, 4.12 ± 0.26, P 〉 0.05）. The inflammatory changes such as interstitial edema, polymorphonuclear neutrophUs （PMNs） and vacuolization were significantly ameliorated compared to AEP group （P 〈 0.01）. A small number of BrdU-labeled nuclei were observed in acinar cells of AEP rats （1.8 ± 0.3 nuclei/microscopic field, n = 10） while diffuse BrdU-labeled nuclei were found in bFGF-treated rats （18.9 ± 1.4 nuclei/microscopic field, n = 10） （P 〈 0.01）. Immunohistochemical study showed increased DNA synthesis in pancreatic acinar cells. CONCLUSION： Early administration of exogenous bFGF has significant therapeutic effect on cerulein-induced acute edematous pancreatitis in rats. Its mechanism is related to the amelioration of inflammation and facilitation of pancreatic regeneration.展开更多
Wound complications are estimated to be affected in about 9% of TKA patients, which may increase the risk of deep periprosthetic infection and results in re-operation, joint fusion, or amputation. Here we have reporte...Wound complications are estimated to be affected in about 9% of TKA patients, which may increase the risk of deep periprosthetic infection and results in re-operation, joint fusion, or amputation. Here we have reported a female patient who suffered wound rupture due to early post-operation mobilization and weight-bearing. The wound dehiscence was successfully managed by applying recombinant basic fibroblast growth factor-2 and anti-infective treatment without removing prosthetic joint.展开更多
BACKGROUND： Both animal experiments and clinical studies have shown that basic fibroblast growth factor （bFGF） and danshen （Salvia miltiorrhiza） can exhibit protective effects on ischemia-reperfusion cerebral inj...BACKGROUND： Both animal experiments and clinical studies have shown that basic fibroblast growth factor （bFGF） and danshen （Salvia miltiorrhiza） can exhibit protective effects on ischemia-reperfusion cerebral injury. OBJECTIVE： To test whether bFGF and danshen can protect cerebral injury induced by exposure to repeated, high, positive acceleration （＋Gz） in an animal model and to analyze the possible mechanisms. DESIGN, TIME AND SETTING： Randomized controlled animal study. The experiment was performed at the Research Center for Molecular Biology, Air-force General Hospital of Chinese PLA from April to August 2000. MATERIALS： A total of 20 clean grade, healthy, Sprague Dawley rats of both genders, weighing （200 ± 15） g, were provided by our experimental animal center. Rats were randomly divided into 5 groups： the control group, ＋Gz exposure group, bFGF group, danshen group, and saline group, with 4 animals per group. bFGF （Beijing Bailuyuan Biotechnology Co. Ltd.） and danshen solution （Shanghai Zhongxi Pharmaceutical Co. Ltd.） were used. METHODS： All rats were fixed on a rotary arm of a centrifugal apparatus （2 m in radius） with their heads oriented towards the center of the apparatus. Except for rats in the control group, the value of ＋Gz exposure was ＋14 Gz with an acceleration rate of 1.5 G/s. The peak force lasted for 45 seconds. ＋Gz exposure was performed three times with intervals of 30 minutes. Rats in the control group received the same ＋Gz procedure, but the G value was ＋1 Gz. Rats in bFGF group and danshen group were intraperitoneally injected with 100 μg/kg bFGF or 15 g/kg danshen solution, respectively, at 30 minutes prior to centrifugation and immediately after centrifugation. Rats in saline group were injected with the same volume of saline. Six hours after exposure, rats were decapitated. One hemisphere was preserved in liquid nitrogen for RNA extraction and the other was processed for apoptosis detection. MAIN OUTCOME MEASURES： mRNA levels of bcl-2 and p53 were measured by semi-quantitative reverse-transcription polymerase chain reaction. Apoptotic cell death was detected by terminal deoxynuleotidyl transferase-mediated dUTP nick end labeling. RESULTS： Changes in mRNA expression of bcl-2 and p53 and apoptotic cells were observed in rat brain six hours after repeated ＋Gz exposures, bFGF and danshen were able block the changes of bcl-2 and p53 expression and inhibit apoptotic cell death. CONCLUSION： The data suggest that apoptosis and changes in bcl-2 and p53 expression in the rat brain can be induced by repeated ＋Gz exposures. Apoptosis is, therefore, one of the molecular mechanisms of brain damage induced by repeated ＋Gz exposures, bFGF and danshen were of the equal potency in preventing brain injury induced by repeated ＋Gz exposures.展开更多
文摘Objective:To evaluate the therapeutic effect of recombinant bovine basic fibroblast growth factor(rbFGF)eye gel combined with tobramycin-dexamethasone(TOB-Dex)eye drops on dry eye syndrome(DES)after cataract surgery.Methods:86 patients with DES after cataract surgery,admitted from November 2021 to November 2023,were randomly divided into groups.The observation group included 43 patients treated with rbFGF eye gel combined with TOB-Dex eye drops.The reference group included 43 patients treated with TOB-Dex eye drops alone.Multiple indicators,including total effective rate and clinical symptom scores,were compared between the two groups.Results:The total effective rate in the observation group was higher than in the reference group(P<0.05).Before treatment,there were no differences in clinical symptom scores,serum factors,or disease severity scores between the two groups(P>0.05).Three weeks after treatment,the observation group had lower clinical symptom scores,serum factors,and disease severity scores compared to the reference group(P<0.05).The adverse reaction rate in the observation group was lower than in the reference group(P<0.05).Conclusion:rbFGF eye gel combined with TOB-Dex eye drops can improve the clinical efficacy for patients with DES after cataract surgery,alleviate disease symptoms,reduce inflammatory responses,and have fewer adverse reactions.
基金supported by a grant from the Hunan Provincial Science and Technology Ministry in China, No. 2012SK3222Funding for New Teachers by the Ministry of Education in China, No. 200805331166
文摘The distal end of the spinal cord and neuromuscular junction may develop secondary degeneration and damage following spinal cord injury because of the loss of neural connections. In this study, a rat model of spinal cord injury, established using a modified Allen＇s method, was injected with basic fibroblast growth factor solution via subarachnoid catheter. After injection, rats with spinal cord injury displayed higher scores on the Basso, Beattie and Bresnahan locomotor scale. Motor function was also well recovered and hematoxylin-eosin staining showed that spinal glial scar hyperplasia was not apparent. Additionally, anterior tibial muscle fibers slowly, but progressively, atrophied. Immu- nohistochemical staining showed that the absorbance values of calcitonin gene related peptide and acetylcholinesterase in anterior tibial muscle and spinal cord were similar, and injection of basic fi- broblast growth factor increased this absorbance. Results showed that after spinal cord injury, the distal motor neurons and motor endplate degenerated. Changes in calcitonin gene related peptide and acetylcholinesterase in the spinal cord anterior horn motor neurons and motor endplate then occurred that were consistent with this regeneration. Our findings indicate that basic fibroblast growth factor can protect the endplate through gene related peptide and acetylcholinesterase cord. attenuating the decreased expression of calcitonin n anterior horn motor neurons of the injured spinal
文摘Objective: To evaluate the efficacy and the indication of basic fibroblast growth factor (bFGF) in the treatment of exposure of orbital implants. Design: Retrospective and observational case series. Methods: We reviewed 41 patients (41 eyes) suffering exposure of orbital implants from Jan. 2000 to June 2006. The study group patients with mild exposure received com-bined treatment with bFGF and antibiotic drops, and while the control group patients with mild exposure were treated with anti-biotic drops only. The study group patients with moderate and severe exposure received combined treatment with bFGF and antibiotic drops, and after 2 months they were subjected to amniotic membrane transplantation, while the control group patients with moderate and severe exposure underwent amniotic membrane transplantation after using antibiotic drops. Observation of the growth of conjunctival epithelium and comparison of the healing rate of the two groups. Results: The healing rates of the mild, moderate and severe exposure study group were 100% and 92.3%. The healing rates of the mild, moderate and severe exposure control group were 55.6% and 66.7% respectively. The difference of the healing rates of the mild exposure study group and the control group was significant (P=0.033). And the difference of the healing rates of the moderate and severe exposure study group and the control group was not significant (P=0.167). Conclusion: bFGF may promote obviously the healing of orbital implant exposure, particularly it can be the first choice for the treatment of mild degree exposure. For the moderate and severe cases, it can be administered before surgical repair to enhance neovascularization and will tend to increase the success rate of surgical repair.
基金Science and Technology Plan Program of Social Development of Guangdong Science and Technology Department in 2007,No.73127
文摘BACKGROUND： Spleen deficiency in traditional Chinese medicine refers to the functional disorder of spleen, pancreas, intestines, and nervous system in modern medicine. OBJECTIVE; To test whether electro-acupuncture could alter basic fibroblast growth factor （bFGF） protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats. DESIGN, TIME AND SETTING： The randomized, controlled, in vivo animal experiment was performed at the National LeveI-B Laboratory of Clinical Cell Molecule and Biology in Shenzhen Hospital of Traditional Chinese Medicine, between March and November in 2008. MATERIALS： Reserpine injection was produced by Guangdong Bangmin Pharmaceutical Co. Rhubarb extract granule preparation was produced by Guangdong Yifang Pharmaceutical. Huanqiu Brand sterile acupuncture pin was provided by Suzhou Acupuncture Supplies, China. Huatuo Brand electroacupuncture instrument （type SDZ-II） was purchased from Suzhou Medical Appliance Factory, China. METHODS： A total of 96 male Sprague Dawley rats were randomly assigned to control （n = 32） and induction （n = 64） groups. Spleen deficiency was induced via intraperitoneal injection of reserpine and intragastric administration of rhubarb. The successful models were randomized into two groups： model and electro-acupuncture, with 32 rats in each group. Electro-acupuncture was administered at Zusanfi （ST 36） and Sanyinjiao （SP 6） acupoints using a condensation wave and rarefaction （condensation wave 15 Hz） at a strength of 6-15 V for 20 minutes, once per day. The appearance of a slight shiver in the corresponding locus was taken as the standard. According to electro- acupuncture time points, each group was assigned to four subgroups at 7, 14, 28, and 49 days, respectively, with eight rats in each subgroup. Immunohistochemical staining, image analysis, and reverse-transcription polymerase chain reaction were performed at different time points. MAIN OUTCOME MEASURES： bFGF protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats. RESULTS： After 7 days of electro-acupuncture therapy, bFGF protein and mRNA expression significantly increased compared with the model and control groups （P 〈 0.05）. After 14 days, bFGF protein and mRNA expression decreased until 28 days, where levels were then equal to the model group and greater than the control group （P 〈 0.05）. After 49 days, the above indices remained increased in the electro-acupuncture group compared to the model and control groups （P 〈 0.05）. CONCLUSION： Continuous electro-acupuncture maintained a high level of bFGF protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats.
文摘This study developed an animal model of surgically wounded submandibular glands （SMGs） and investigated the effects of collagen gel with basic fibroblast growth factor （bFGF） on tissue regeneration of surgically wounded SMGs in vivo. The animal model was produced by creating a surgical wound using a 3-mm diameter biopsy punch in SMGs. The wound was filled with collagen gel with bFGF （bFGF group） or without bFGF （control group）. In the animal model of surgically wounded SMGs, salivary glands without scar tissue around the wound area were observed with smaller areas of collagen gel. Small round and spindle-shape cells invaded the collagen gel in both groups after operation day （AOD） 5, and this invasion dramatically increased at AOD 7. Host tissue completely replaced the collagen gel at AOD 21. The invading immune cells in the group treated with collagen gel with bFGF were positive for vimentin, g-smooth muscle actin （αSMA）, CD49f, c-kit and AQP5 at AOD 7. Similarly, the mRNA expression of vimentin, αSMA, CD49f, keratin 19 and AQP5 was also increased. This study suggests that the use of collagen gels with bFGF improves salivary gland regeneration.
文摘AIMTo expose rat retinal Müller cells to 530 nm monochromatic light and investigate the influence of varying light illumination times on basic fibroblast growth factor (bFGF) and transforming growth factor-β1 (TGF-β1) expression.METHODSThree groups of rat retinal Müller cells cultured in vitro under a 530 nm monochromatic light were divided into 6, 12 and 24h experimental groups, while cells incubated under dark conditions served as the control group. The bFGF and TGF-β1 mRNA expression, protein levels and fluorescence intensity of the Müller cells were analyzed.RESULTSThe bFGF mRNA expression and protein levels were significantly upregulated in Müller cells in all three experimental groups compared with the control group (P<0.05), while that of TGF-β1 was downregulated (P<0.05). Also, bFGF expression was positively correlated, but TGF-β1 expression was negatively correlated with illumination time. The largest changes for both cytokines were seen in the 24h group. The changes in bFGF and TGF-β1 fluorescence intensity were highest in the 24h group, and significant differences were observed among the experimental groups (P<0.05).CONCLUSIONThe expressions of bFGF and TGF-β1 changed in a time-dependent manner in Müller cells exposed to 530 nm monochromatic light with 250 lx illumination intensity. Müller cells might play a role in the development of myopia by increasing bFGF expression or decreasing TGF-β1 expression. Changes in cytokine expression in retinal Müller cells may affect monochromatic light-induced myopia.
基金sponsored by Shanghai Key Projects of Basic Research,No.08JC1413900
文摘The difference between Noggin and basic fibroblast growth factor for the neural precursor differen- tiation from human embryonic stem cells has not been studied. In this study, 100 tJg/L Noggin or 20 IJg/L basic fibroblast growth factor in serum-free neural induction medium was used to differen- tiate human embryonic stem cells H14 into neural precursors using monolayer differentiation. Two weeks after induction, significantly higher numbers of neural rosettes formed in the Noggin-induced group than the basic fibroblast growth factor-induced group, as detected by phase contrast micro- scope. Immunofluorescence staining revealed expression levels of Nestin, [3-111 Tubulin and Sox-1 were higher in the induced cells and reverse-transcription PCR showed induced cells expressed Nestin, Sox-1 and Neurofilament mRNA. Protein and mRNA expression in the Noggin-induced group was increased compared with the basic fibroblast growth factor-induced group. Noggin has a greater effect than basic fibroblast growth factor on the induction of human embryonic stem cell differentiation into neural precursors by monolayer differentiation, as Noggin accelerates and in- creases the differentiation of neural precursors.
基金supported by grants from the Ministry of Education of China,No.[2007]1108Tianjin Health Bureau,No.06KG05
文摘The present study established a mouse model of cerebral infarction by middle cerebral artery occlusion, and monitored the effect of 25 tJg/kg leukemia inhibitory factor and （or） basic fibroblast growth factor administration 2 hours after model establishment. Results showed that following administration, the number of endogenous neural stem cells in the infarct area significantly increased, malondialdehyde content in brain tissue homogenates significantly decreased, nitric oxide content, glutathione peroxidase and superoxide dismutase activity significantly elevated, and mouse motor function significantly improved as confirmed by the rotarod and bar grab tests. In particular, the effect of leukemia inhibitory factor in combination with basic fibroblast growth factor was the most significant. Results indicate that leukemia inhibitory factor and basic fibroblast growth factor can improve the microenvironment after cerebral infarction by altering free radical levels, improving the quantity of endogenous neural stem cells, and promoting neurological function of mice with cerebral infarction.
文摘The expression of basic fibroblast growth factor (bFGF) and fibroblast growth factor receptor-1 (FGFR-1) in human meningiomas and the relationships between their expression and the tumors' histological features and angiogenesis were investigated by means of immunohistochemical technique. The expression of bFGF and FGFR-1 was detected by antibody of bFGF or FGFR-1. The tumors' angiogenesis was evaluated by microvascular density (MVD) and, which was observed by use of CD34-antibody immunohistochemically. The results showed that there were varied degrees of the expression of bFGF and FGFR-1 proteins in meningiomas. The expression was correlated with the tumors' histological characters and angiogenesis. It was concluded that bFGF and FGFR-1 might play important roles in meningiomas' angiogenesis and proliferation. The expression positive rate of bFGF and FGFR-1 may provide an indication of evaluating the histological and malignant degree of the tumor.
文摘Objectives To observe the effect of basic fibroblast growth factor (bFGF) slow-release microcapsules on angiogenesis in infarcted myocardial regions. Methods.Myocardial infarction was induced in 24 New Zealand rabbits by ligating the root of left anterior descending coronary artery.Group Ⅰ(n=8) served as control, group Ⅱ(n=8) as a blank microcapsule group, group Ⅲ(n=8, each microcapsule contains 1μg bFGF) as micrpcapsule group.In group Ⅱ and Ⅲ, 5 blank microcapsules or bFGF slow-release microcapsules were implanted into myocardium underneath the epicardium between the left anterior descending coronary artery and left circumflex artery.Infarct size was evaluated by infarcted weight/left ventricle weight ratio and angiogenesis was evaluated by immunohistochemical examinations 5 weeks later. [WT5”BX] Results.As compared with group Ⅰ and Ⅱ, rabbits treated with bFGF slow-release microcapsules showed higher microvessel counts (group Ⅰ3775±450, group Ⅱ3837±498,vs.group Ⅲ 13550±481,P<0001) and less infarcted weight /left ventricle weight (group Ⅰ168%±04%,group Ⅱ167%±05%,vs.group Ⅲ 70%±02%,P<0001). Conclusions.Subepicardial administration of bFGF slow-release microcapsule in the infarcted rabbit model results in effective angiogenesis and reduction in infarct size.
文摘Summary:The expression of basic fibroblast growth factor (bFGF) in rat liver fibrosis and hepatic stellate cells (HSCs) and the relationship between the expression of bFGF and rat liver fibrogenesis were studied. Sixty male SD rats (230-260 g) were divided into 4 groups randomly (the 0 week group, 1 week group, 4 week group and 8 week group). Liver fibrosis was induced by subcutaneous injection of carbon tetrachloride. The sections of rats' liver in each group were tested by Van-Gieson (V-G) staining and immunohistochemistry. The expression of bFGF mRNA was detected by reverse transcription polymerase chain reaction (RT-PCR). HSCs were isolated by the combined methods of collagenase IV perfusion and density gradient centrifugation. The expression of bFGF protein in cultured HSCs was detected by Western blot. Images of immunohistochemistry detection, agarose gel electrophoresis of RT-PCR and SDS-polyacrylamide gel electrophoresis of Western blot were analyzed semiquantitatively by image-analyzing system. The results were analyzed by statistics. The results showed that the fibers were gradually increased in the sections of rat liver with the prolongation of the model induction. At the end of the 8th weeks, liver fibrosis was formed. The expression of bFGF detected by immunohistochemistry showed a similar tendency of gradual increase. At the end of the 8th weeks, the bFGF expression could be observed in many regions in sections and the strongest expression was in interstitial cells including HSCs and some hepatocytes in regions around the portal area and central veins. Also there was moderate expression widely in extracellular matrix (ECM). In RT-PCR detection and Western blot detection of HSCs cultured in vitro, the similar tendency of gradual increase was evident either. It is suggested that bFGF is related with liver fibrosis of rats closely and may be a fibrogenesis factor of liver. bFGF possibly regulates liver fibrogenesis through regulating metabolism of extracellular matrix (ECM) by autocrine and paracrine stimulation.
基金Supported by the National Natural Sciences Foundation of China(30170945).
文摘Objective To explore a new method for the therapy of avascular necrosis of the femoral head. Method The recombinant plasmid pCD-rbFGF was mixed with collagen and was implanted in the necrotic femoral head. Expression of basic fibroblast growth factor (bFGF) was examined by RT-PCR and immunohistochemical method. Re-pair of the femoral head was observed by histological and histomorphometric analysis. Result Expression of bFGF was detected in the femoral head transfected with bFGF gene, indicating significant increase of angiogenesis 2 weeks after gene transfection and increased new bone formation 8 weeks after gene transfection on histom-orphometric analysis (P< 0.01). Conclusion Transfection of bFGF gene enhances bone tissue angiogenesis. Repair in osteonecrosis would be accelerated accordingly.
文摘AIM: To investigate the function of basic fibroblast growth factor (bFGF) on cat corneal endothelial cells proliferation. METHODS: Cat corneal endothelial cells were primarily cultured, stimulated with bFGF for different period, the proliferation of cells was assayed by modified tertrozalium salt (MTT) method, and the morphologic changes were observed with inverted phase contrast microscope and transmission electron microscope. RESULTS: At 1, 3 and 5 days after bFGF was added to cat corneal endothelial cells, the result of MTT in 490nm showed significant difference than that in control group, and the difference was most significant in 10ng/mL group. CONCLUSION: bFGF can promote proliferation of cat corneal endothelial cells. 10ng/mL is the relatively most effective dose.
文摘BACKGROUND： Basic fibroblast growth factor （bFGF） exhibits neuroprotective functions, but the possible mechanisms of bFGF on vascular dementia remain unclear. OBJECTIVE： To explore the neuroprotective effects of bFGF on a mouse model of vascular dementia, with focus on oxidative damage. DESIGN, TIME AND SETTING： A randomized, controlled, animal experiment was performed at the Medical College of Beihua University from March to December 2008. MATERIALS： bFGF was purchased from Peprotech, USA. METHODS： A total of 80 healthy, Kunming mice were randomly assigned to control, sham-surgery, model, and bFGF groups. The model and bFGF groups were used to establish vascular dementia models by repetitive cerebral ischemia-reperfusion in a conscious state. In addition, bFGF group mice were intraperitoneally injected with bFGF （100 pg/kg） following model establishment, once a day for 7 consecutive days. MAIN OUTCOME MEASURES： The Morris water maze was used to determine the influence of bFGF on learning and memory abilities in vascular dementia mice. The pathomorphological changes in hippocampal CA1 neurons were observed by Nissl staining. Superoxide dismutase and malondialdehyde changes were analyzed using biochemical analysis methods. Annexin V-FITC/PI-double-labeled flow cytometry was used to detect neuronal apoptosis. RESULTS： Learning and memory functions in model mice significantly decreased, as characterized by prolonged latency and reduced time and number of platform crossings （P 〈 0.01, P 〈 0.05）. Superoxide dismutase activity was significantly reduced, malondialdehyde content was significantly increased （P 〈 0.01）, and hippocampal neuronal apoptosis was increased （P 〈 0.01） following vascular dementia, bFGF increased superoxide dismutase activity, decreased malondialdehyde content, and reduced hippocampal neuronal apoptosis （P 〈 0.01）, which resulted in improved learning and memory in mice with vascular dementia. CONCLUSION： bFGF improved learning and memory deficits in mice with vascular dementia by reducing free radical injury and inhibiting hippocampal neuronal apoptosis.
基金Supported by:Scientific Research Foundation for Colleges and Universities of Education Department of Liaoning Province,No. 2004D173
文摘BACKGROUND： The Wnt/β-catenin signaling pathway plays an important role in neural development. ,β-catenin is an important component of the Wnt/β-catenin signaling pathway. The Wnt signaling pathway has been shown to regulate the interaction of neural stem cells with the extracellular matrix. OBJECTIVE： To investigate the effects of basic fibroblast growth factor （bFGF） on β-catenin protein and mRNA expression, and on hippocampal neural stem cell proliferation in a rat model of cerebral ischemia/reperfusion. DESIGN, TIME AND SETTING： A randomized, controlled, neurobiology experiment was performed in Shenyang Medical College between August 2006 and August 2008. MATERIALS： A total of 72 healthy male Wistar rats, aged 3 months, were used in this study. bFGF was provided by Beijing SL Pharmaceutical Co.,Ltd., China. METHODS： Rats were randomly divided into 3 groups： sham-operated, ischemia/reperfusion, and bFGF-treated （n = 24 per group）. Focal cerebral ischemia/reperfusion was induced in rats from the ischemia/reperfusion group and the bFGF-treated group by 2 hour right middle cerebral artery occlusion and 2 hour restoration of blood flow using the suture method. The ischemia/reperfusion and bFGF-treated groups were intraperitoneally administered 500 IU/mL of bFGF, or the same volume of physiological saline, once a day at postoperative days 1 3, and once every 3 days thereafter. Simultaneously, the sham-operated group underwent experimental procedures identical to the ischemia/reperfusion and bFGF-treated groups, with the exception of ischemia/reperfusion induction and drug administration. At 2 hours, 2, 6, 13, and 20 days after ischemiaJreperfusion induction, 50 mg/kg bromodeoxyuridine （BrdU） was administered to each group, twice daily, to label proliferating neural stem cells. MAIN OUTCOME MEASURES： The effects of bFGF on BrdU labeling, and ,8 -catenin mRNA and protein expression, in neural stem cells were examined by immunohistochemistry, Western blot, RT-PCR, and in situ hybridization techniques. RESULTS： In the sham-operated group, only a few BrdU-immunoreactive neural stem cells were found. In the ischemia/reperfusion group, BrdU-immunoreactive cells began to increase from 3 days after ischemia/reperfusion induction, reached a peak level at 7 days, and gradually reduced from 21 days. At 3, 7, 14, and 21 days after ischemia/reperfusion induction, the numbers of BrdU-immunoreactive cells were significantly greater in the bFGF-treated group than in the ischemia/reperfusion group. The sham-operated group exhibited slight expression of β-catenin and β-catenin mRNA. In the ischemia/reperfusion group, the expression of β-catenin and β-catenin mRNA gradually increased with reperfusion time, peaked at 14 days after reperfusion, and gradually decreased thereafter; by 21 days, the expression was markedly lower. Following bFGF injection, the expression of hippocampal BrdU, β-catenin, and β-catenin mRNA had apparently increased in each group. CONCLUSION： bFGF promotes neural stem cell proliferation, and the expression of β-catenin and β-catenin mRNA in the ischemic brain tissue. These findings indicate that bFGF promotion of neural stem cell proliferation may be mediated by Wnt/β-catenin signaling pathway.
基金supported by grants from the Natural Science Foundation of China(No.30973671)the Natural Science Foundation of Guangdong Province of China(No.9151064001000031)
文摘The amino acid at the 119th position of human basic fibroblast growth factor(hbFGF),lysine(K119),is a critical component for its mitogenic activity.However,little is known about the effects of the characteristics of this residue including charge on the mitogenic activity of hbFGF.Herein,this basic residue was replaced with neutral glutamine residue and acidic glutamic acid residue to construct mutants hbFGF^(K119Q) and hbFGF^(K119E),respectively.The mutants were produced by BL21(DE3)/pET3c expression system...
基金Scientific Research Foundation of Liaoning Provincial Education Department for Higher Education Institutions, No.05L442
文摘BACKGROUND： cAMP-response element binding protein （CREB） is a key modulator of various signaling pathways. CREB activation initiates a series of intracellular signaling pathways that promote neuronal survival. OBJECTIVE： To investigate the regulatory effects of basic fibroblast growth factor （bFGF） on cerebral neuronal CREB expression following ischemia/reperfusion injury. DESIGN, TIME AND SETTING： An immunohistochemical detection experiment was performed at the Department of Anatomy, Shenyang Medical College, between October 2006 and April 2008. MATERIALS： A total of 60 healthy, adult, Wistar rats were randomly divided into three groups： sham-operated （n =12）, ischemia/reperfusion （n = 24）, and bFGF-treated （n = 24）. Rabbit anti-rat CREB （1： 100） and biotin labeled goat anti-rabbit IgG were purchased from the Wuhan Boster Company, China. MetaMorph-evolution MP5.0-BX51 microscopy imaging system was provided by China Medical University, China. METHODS： Rat models of cerebral ischemia/reperfusion injury were developed using the suture method for right middle cerebral artery occlusion. Two-hour ischemia was followed by reperfusion. Rats from the bFGF-treated and ischemia/reperfusion groups were intraperitoneally administered endogenous bFGF （500 IU/mL, 2 000 IU/kg） or an equal amount of physiological saline. Rats from the sham-operated group underwent a similar surgical procedure, without induction of ischemia/reperfusion injury and drug administration. MAIN OUTCOME MEASURES： After 48-hour reperfusion, hippocampal and parietal cortical neuronal CREB expression was detected by immunohistochemistry, and the absorbance of hippocampal CREB-positive products was determined using MetaMorph-evolutionMP5.0-BX51 microscopy imaging system. RESULTS： The sham-operated group exhibited noticeable CREB expression in hippocampal and parietal cortical neurons. In the ischemia/reperfusion group, the CREB expression was discrete and neurons were poorly arranged. The bFGF-treated group exhibited increased CREB expression and better neuronal arrangement compared with the ischemia/reperfusion group. The mean absorbance of CREB-immunoreactive products in the hippocampus and parietal cortex was significantly higher in the ischemia/reperfusion group than in the sham-operated group （P 〈 0.05）, and significantly higher in the bFGF-treated group than in the ischemia/reperfusion group （P 〈 0.05）. CONCLUSION： bFGF significantly upregulates CREB expression in hippocampal and parietal cortical neurons following ischemia/reperfusion injury.
文摘AIM： To observe the therapeutic effect of early administration of exogenous Basic fibroblast growth factor （bFGF） on acute edematous pancreatitis （AEP） in rats. METHODS： Thirty male Sprague-Dawley rats were randomly divided into three （n = 10）： normal control group （group Ⅰ）, AEP group （group Ⅱ） and AEP with bFGF treatment group （group Ⅲ）. AEP was induced by subcutaneous injection of cerulein （5.5 μg/kg and 7.5 μg/kg） at 1 h interval into rats of groups Ⅱ and Ⅲ. Three hours after induction of AEP, 100 μg/kg bFGF was administrated intraperitoneally for 1h to group Ⅲ rats. For test of DNA synthesis in acinar cells, 5-bromo-2＇-deoxyuridine （BrdU） labeling solution was intraperitoneally injected into the rats of groups Ⅱ and Ⅲ 24 h after bFGF treatment. The changes in serum amylase, lipase, pancreatic tissue wet/dry ratio were detected. RESULTS： In bFGF treatment group, there was a significant decrease in the volume of serum amylase, lipase and the pancreatic wet/dry weight ratio（1383.0 ± 94.6 U/L, 194.0 ± 43.6 U/L, 4.32 ± 0.32） compared to AEP group （3464 ± 223,7 U/L, 456 ±68,7 U/L, 6.89 ± 0,47） （P 〈 0.01）, and no significant difference was found between bFGF treatment and control group （1289 ± 94.0 U/L, 171 ± 23.4 U/L, 4.12 ± 0.26, P 〉 0.05）. The inflammatory changes such as interstitial edema, polymorphonuclear neutrophUs （PMNs） and vacuolization were significantly ameliorated compared to AEP group （P 〈 0.01）. A small number of BrdU-labeled nuclei were observed in acinar cells of AEP rats （1.8 ± 0.3 nuclei/microscopic field, n = 10） while diffuse BrdU-labeled nuclei were found in bFGF-treated rats （18.9 ± 1.4 nuclei/microscopic field, n = 10） （P 〈 0.01）. Immunohistochemical study showed increased DNA synthesis in pancreatic acinar cells. CONCLUSION： Early administration of exogenous bFGF has significant therapeutic effect on cerulein-induced acute edematous pancreatitis in rats. Its mechanism is related to the amelioration of inflammation and facilitation of pancreatic regeneration.
文摘Wound complications are estimated to be affected in about 9% of TKA patients, which may increase the risk of deep periprosthetic infection and results in re-operation, joint fusion, or amputation. Here we have reported a female patient who suffered wound rupture due to early post-operation mobilization and weight-bearing. The wound dehiscence was successfully managed by applying recombinant basic fibroblast growth factor-2 and anti-infective treatment without removing prosthetic joint.
文摘BACKGROUND： Both animal experiments and clinical studies have shown that basic fibroblast growth factor （bFGF） and danshen （Salvia miltiorrhiza） can exhibit protective effects on ischemia-reperfusion cerebral injury. OBJECTIVE： To test whether bFGF and danshen can protect cerebral injury induced by exposure to repeated, high, positive acceleration （＋Gz） in an animal model and to analyze the possible mechanisms. DESIGN, TIME AND SETTING： Randomized controlled animal study. The experiment was performed at the Research Center for Molecular Biology, Air-force General Hospital of Chinese PLA from April to August 2000. MATERIALS： A total of 20 clean grade, healthy, Sprague Dawley rats of both genders, weighing （200 ± 15） g, were provided by our experimental animal center. Rats were randomly divided into 5 groups： the control group, ＋Gz exposure group, bFGF group, danshen group, and saline group, with 4 animals per group. bFGF （Beijing Bailuyuan Biotechnology Co. Ltd.） and danshen solution （Shanghai Zhongxi Pharmaceutical Co. Ltd.） were used. METHODS： All rats were fixed on a rotary arm of a centrifugal apparatus （2 m in radius） with their heads oriented towards the center of the apparatus. Except for rats in the control group, the value of ＋Gz exposure was ＋14 Gz with an acceleration rate of 1.5 G/s. The peak force lasted for 45 seconds. ＋Gz exposure was performed three times with intervals of 30 minutes. Rats in the control group received the same ＋Gz procedure, but the G value was ＋1 Gz. Rats in bFGF group and danshen group were intraperitoneally injected with 100 μg/kg bFGF or 15 g/kg danshen solution, respectively, at 30 minutes prior to centrifugation and immediately after centrifugation. Rats in saline group were injected with the same volume of saline. Six hours after exposure, rats were decapitated. One hemisphere was preserved in liquid nitrogen for RNA extraction and the other was processed for apoptosis detection. MAIN OUTCOME MEASURES： mRNA levels of bcl-2 and p53 were measured by semi-quantitative reverse-transcription polymerase chain reaction. Apoptotic cell death was detected by terminal deoxynuleotidyl transferase-mediated dUTP nick end labeling. RESULTS： Changes in mRNA expression of bcl-2 and p53 and apoptotic cells were observed in rat brain six hours after repeated ＋Gz exposures, bFGF and danshen were able block the changes of bcl-2 and p53 expression and inhibit apoptotic cell death. CONCLUSION： The data suggest that apoptosis and changes in bcl-2 and p53 expression in the rat brain can be induced by repeated ＋Gz exposures. Apoptosis is, therefore, one of the molecular mechanisms of brain damage induced by repeated ＋Gz exposures, bFGF and danshen were of the equal potency in preventing brain injury induced by repeated ＋Gz exposures.
