Cardiovascular complications of patients with type 2 diabetes mellitus(T2DM)threaten the health and life of numerous individuals.Recently,growth factor receptor-binding protein 10(GRB10)was found to play a pivotal rol...Cardiovascular complications of patients with type 2 diabetes mellitus(T2DM)threaten the health and life of numerous individuals.Recently,growth factor receptor-binding protein 10(GRB10)was found to play a pivotal role in vascular complications of T2DM,which participates in the regulation of lipid metabolism of T2DM patients.The genetic variation of GRB10 rs1800504 is closely related to the risk of coronary heart disease in patients with T2DM.The development of GRB10 as a key mediator in the association of lipid metabolism with cardiovascular complications in T2DM is detailed in and may provide new potential concerns for the study of cardiovascular complications in T2DM patients.展开更多
To examine phosphatase and tensin homology deleted in chromosome 10 (PTEN),hypoxia-inducible factor-1 alpha (HIF-1 alpha) gene expressions and their relation to vascular endothelial growth factor(VEGF) protein express...To examine phosphatase and tensin homology deleted in chromosome 10 (PTEN),hypoxia-inducible factor-1 alpha (HIF-1 alpha) gene expressions and their relation to vascular endothelial growth factor(VEGF) protein expression in the patients with human colorectal adenomas and adenocarcinomas.Methods The expression of PTEN,HIF-1 alpha gene was detected by using in situ hybridization,and the VEGF expression levels by immunohistochemistry in colorectal adenomas and primary colorectal adenocarcinoma.Results Strong expression of HIF-1 alpha was detectable in the majority of colorectal dadenocarcinoma,particularly surrounding areas of necrosis in adenocarcinoma.PTEN,HIF-1 alpha mRNA and VEGF protein were positive in 51.6%,67.7% and 59.7% respectively in 62 cases of adenocarcinomas,and 77.8%,44.4% and 33.3% respectively in 18 cases of adenomas.The positive rate of VEGF was higher in the patients with colorectal adenocarcinomas than that in those with adenomas,whereas that of PTEN mRNA was contrary.HIF-1 mRNA expression was correlated significantly with lymph node metastasis,liver metastasis,Duke’s stage and recurrence.During colorectal tumor progression,the expression of HIF-1 alpha mRNA was positively correlated with the VEGF protein expression (χ2= 4.751 ,P<0.05),but negatively with the PTEN mRNA expression(χ2=21.84,P<0.01).Conclusion The absence or low expression of PTEN and the increased levels of HIF-1α and VEGF may paly an important role in carcinogenesis and progression of colorectal carcinoma.These results suggest that VEGF upregulated by HIF-1 alpha gene may be involved in angiogenesis of colorectal adenocarcinoma.4 refs,1 tab.展开更多
AIM:To investigate the role of genetic polymorphisms in the progression of hepatic fibrosis in hereditary haemochromatosis.METHODS:A cohort of 245 well-characterised C282Y homozygous patients with haemochromatosis was...AIM:To investigate the role of genetic polymorphisms in the progression of hepatic fibrosis in hereditary haemochromatosis.METHODS:A cohort of 245 well-characterised C282Y homozygous patients with haemochromatosis was studied,with all subjects having liver biopsy data and DNA available for testing.This study assessed the association of eight single nucleotide polymorphisms(SNPs)in a total of six genes including toll-like receptor 4(TLR4),transforming growth factor-beta(TGF-β),oxoguanine DNA glycosylase,monocyte chemoattractant protein 1,chemokine C-C motif receptor 2 and interleukin-10 with liver disease severity.Genotyping was performed using high resolution melt analysis and sequencing.The results were analysed in relation to the stage of hepatic fibrosis in multivariate analysis incorporating other cofactors including alcohol consumption and hepatic iron concentration.RESULTS:There were significant associations between the cofactors of male gender(P=0.0001),increasing age(P=0.006),alcohol consumption(P=0.0001),steatosis(P=0.03),hepatic iron concentration(P<0.0001)and the presence of hepatic fibrosis.Of the candidate gene polymorphisms studied,none showed a significant association with hepatic fibrosis in univariate or multivariate analysis incorporating cofactors.We also specifically studied patients with hepatic iron loading above threshold levels for cirrhosis and compared the genetic polymorphisms between those with no fibrosis vs cirrhosis however there was no significant effect from any of the candidate genes studied.Importantly,in this large,well characterised cohort of patients there was no association between SNPs for TGF-βor TLR4and the presence of fibrosis,cirrhosis or increasing fibrosis stage in multivariate analysis.CONCLUSION:In our large,well characterised group of haemochromatosis subjects we did not demonstrate any relationship between candidate gene polymorphisms and hepatic fibrosis or cirrhosis.展开更多
本试验采用单核苷酸多态性(single nucleotide polymorphism,SNP)直接测序法检测猪锚蛋白重复序列和SOCS盒蛋白基因4(ankyrin repeat and SOCS box containing protein 4,Asb4)与生长因子受体结合蛋白基因10(growth factor recep-tor-bo...本试验采用单核苷酸多态性(single nucleotide polymorphism,SNP)直接测序法检测猪锚蛋白重复序列和SOCS盒蛋白基因4(ankyrin repeat and SOCS box containing protein 4,Asb4)与生长因子受体结合蛋白基因10(growth factor recep-tor-bound protein 10,Grb10)在不同组织器官中的印迹状态。首先,克隆得到了1350bp的Asb4基因cDNA序列及1811bp的Grb10基因cDNA序列,然后进行了SNP直接测序法检测。结果发现,Asb4在1月龄仔猪所有检测组织器官中均为双等位基因表达,而Grb10在1月龄仔猪的舌、肾脏、胃、小肠和脑中为父源等位基因表达,在其他组织器官中为双等位基因表达。实时定量PCR结果表明,Grb10在10种组织器官中的表达量存在显著性差异(P<0.05),其中在肺脏组织中的表达量最高,在小肠和脑中表达量最低。上述结果表明,Grb10可能是猪父源表达的印迹基因,而Asb4则属于猪非印迹基因。展开更多
目的:探究跨膜P24转运蛋白10(TMED10)对骨关节炎中转化生长因子-β(TGF-β)/Smads信号通路的影响。方法:将大鼠软骨细胞分为Control组、IL-1β组、NC-sh+IL-1β组、TMED10-sh+IL-1β组、NC-OE+IL-1β组和TMED10-OE+IL-1β组。Control组...目的:探究跨膜P24转运蛋白10(TMED10)对骨关节炎中转化生长因子-β(TGF-β)/Smads信号通路的影响。方法:将大鼠软骨细胞分为Control组、IL-1β组、NC-sh+IL-1β组、TMED10-sh+IL-1β组、NC-OE+IL-1β组和TMED10-OE+IL-1β组。Control组和IL-1β组细胞不进行转染处理,NC-sh+IL-1β组、TMED10-sh+IL-1β组、NC-OE+IL-1β组和TMED10-OE+IL-1β组细胞分别转染NC-sh、TMED10-sh、NC-OE和TMED10-OE。转染后,除Control组之外,其他组软骨细胞均用白介素-1β(IL-1β)(10 ng/mL)处理24 h模拟OA软骨细胞的病理微环境。通过MTT法检测细胞增殖,通过TUNEL法检测细胞凋亡。采用前交叉韧带切断加内侧半月板部分切除法建立OA大鼠模型,将OA大鼠分为OA组、OA+NC-sh组和OA+TMED10-sh组(n=12),Sham组(n=12)大鼠进行假手术操作。Sham组和OA组大鼠关节腔内注射40μL生理盐水,OA+NC-sh组和OA+TMED10-sh组大鼠关节腔内分别注射40μL的NC-sh和TMED10-sh(滴度为1×10^(9)TU/m L),每周注射1次,共4周。采用番红O/固绿染色法评价膝关节软骨形态,采用TUNEL法检测软骨细胞凋亡。采用RT-qPCR检测软骨细胞和大鼠关节软骨中TMED10的m RNA水平,采用Western blot检测软骨细胞和大鼠关节软骨中TMED10、TGF-β1、Smad2、p-Smad2、Smad3、p-Smad3、Collagen II和MMP-13的蛋白表达水平。结果:与Control组比较,IL-1β组TUNEL阳性率、TMED10 m RNA和TMED10、MMP-13蛋白水平均升高(P<0.05),相对细胞活力以及TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II的蛋白水平均降低(P<0.05)。与IL-1β组和NC-sh+IL-1β组比较,TMED10-sh+IL-1β组TUNEL阳性率、TMED10 m RNA水平和TMED10、MMP-13的蛋白水平均降低(P<0.05),相对细胞活力以及TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II的蛋白水平均升高(P<0.05)。与IL-1β组和NC-OE+IL-1β组比较,TMED10-OE+IL-1β组TUNEL阳性率、TMED10 m RNA水平和TMED10、MMP-13的蛋白水平均升高(P<0.05),相对细胞活力以及TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II的蛋白水平均降低(P<0.05)。与Sham组比较,OA组大鼠的OARSI评分、TUNEL阳性率、TMED10 m RNA水平以及TMED10和MMP-13的蛋白水平均升高(P<0.05),TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II蛋白水平均降低(P<0.05)。与OA组和OA+NC-sh组比较,OA+TMED10-sh组大鼠的OARSI评分、TUNEL阳性率、TMED10 m RNA水平以及TMED10和MMP-13的蛋白水平均降低(P<0.05),TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II蛋白水平均升高(P<0.05)。结论:本研究表明TMED10可能通过抑制TGF-β/Smads信号通路导致软骨细胞丢失和软骨退变,TMED10/TGF-β/Smads信号通路可能是治疗OA的新靶标。展开更多
文摘Cardiovascular complications of patients with type 2 diabetes mellitus(T2DM)threaten the health and life of numerous individuals.Recently,growth factor receptor-binding protein 10(GRB10)was found to play a pivotal role in vascular complications of T2DM,which participates in the regulation of lipid metabolism of T2DM patients.The genetic variation of GRB10 rs1800504 is closely related to the risk of coronary heart disease in patients with T2DM.The development of GRB10 as a key mediator in the association of lipid metabolism with cardiovascular complications in T2DM is detailed in and may provide new potential concerns for the study of cardiovascular complications in T2DM patients.
文摘To examine phosphatase and tensin homology deleted in chromosome 10 (PTEN),hypoxia-inducible factor-1 alpha (HIF-1 alpha) gene expressions and their relation to vascular endothelial growth factor(VEGF) protein expression in the patients with human colorectal adenomas and adenocarcinomas.Methods The expression of PTEN,HIF-1 alpha gene was detected by using in situ hybridization,and the VEGF expression levels by immunohistochemistry in colorectal adenomas and primary colorectal adenocarcinoma.Results Strong expression of HIF-1 alpha was detectable in the majority of colorectal dadenocarcinoma,particularly surrounding areas of necrosis in adenocarcinoma.PTEN,HIF-1 alpha mRNA and VEGF protein were positive in 51.6%,67.7% and 59.7% respectively in 62 cases of adenocarcinomas,and 77.8%,44.4% and 33.3% respectively in 18 cases of adenomas.The positive rate of VEGF was higher in the patients with colorectal adenocarcinomas than that in those with adenomas,whereas that of PTEN mRNA was contrary.HIF-1 mRNA expression was correlated significantly with lymph node metastasis,liver metastasis,Duke’s stage and recurrence.During colorectal tumor progression,the expression of HIF-1 alpha mRNA was positively correlated with the VEGF protein expression (χ2= 4.751 ,P<0.05),but negatively with the PTEN mRNA expression(χ2=21.84,P<0.01).Conclusion The absence or low expression of PTEN and the increased levels of HIF-1α and VEGF may paly an important role in carcinogenesis and progression of colorectal carcinoma.These results suggest that VEGF upregulated by HIF-1 alpha gene may be involved in angiogenesis of colorectal adenocarcinoma.4 refs,1 tab.
基金Supported by NHMRC Medical Postgraduate Scholarship and the Royal Brisbane and Women’s Hospital Research Foundation to Wood MJthe National Health and Medical Research Council(NHMRC)to Ramm GA and Powell LW+1 种基金the recipient of an NHMRC Senior Research Fellowship,1024672 to Subramaniam VNan NHMRC Senior Research Fellowship,No.552409 to Ramm GA
文摘AIM:To investigate the role of genetic polymorphisms in the progression of hepatic fibrosis in hereditary haemochromatosis.METHODS:A cohort of 245 well-characterised C282Y homozygous patients with haemochromatosis was studied,with all subjects having liver biopsy data and DNA available for testing.This study assessed the association of eight single nucleotide polymorphisms(SNPs)in a total of six genes including toll-like receptor 4(TLR4),transforming growth factor-beta(TGF-β),oxoguanine DNA glycosylase,monocyte chemoattractant protein 1,chemokine C-C motif receptor 2 and interleukin-10 with liver disease severity.Genotyping was performed using high resolution melt analysis and sequencing.The results were analysed in relation to the stage of hepatic fibrosis in multivariate analysis incorporating other cofactors including alcohol consumption and hepatic iron concentration.RESULTS:There were significant associations between the cofactors of male gender(P=0.0001),increasing age(P=0.006),alcohol consumption(P=0.0001),steatosis(P=0.03),hepatic iron concentration(P<0.0001)and the presence of hepatic fibrosis.Of the candidate gene polymorphisms studied,none showed a significant association with hepatic fibrosis in univariate or multivariate analysis incorporating cofactors.We also specifically studied patients with hepatic iron loading above threshold levels for cirrhosis and compared the genetic polymorphisms between those with no fibrosis vs cirrhosis however there was no significant effect from any of the candidate genes studied.Importantly,in this large,well characterised cohort of patients there was no association between SNPs for TGF-βor TLR4and the presence of fibrosis,cirrhosis or increasing fibrosis stage in multivariate analysis.CONCLUSION:In our large,well characterised group of haemochromatosis subjects we did not demonstrate any relationship between candidate gene polymorphisms and hepatic fibrosis or cirrhosis.
文摘本试验采用单核苷酸多态性(single nucleotide polymorphism,SNP)直接测序法检测猪锚蛋白重复序列和SOCS盒蛋白基因4(ankyrin repeat and SOCS box containing protein 4,Asb4)与生长因子受体结合蛋白基因10(growth factor recep-tor-bound protein 10,Grb10)在不同组织器官中的印迹状态。首先,克隆得到了1350bp的Asb4基因cDNA序列及1811bp的Grb10基因cDNA序列,然后进行了SNP直接测序法检测。结果发现,Asb4在1月龄仔猪所有检测组织器官中均为双等位基因表达,而Grb10在1月龄仔猪的舌、肾脏、胃、小肠和脑中为父源等位基因表达,在其他组织器官中为双等位基因表达。实时定量PCR结果表明,Grb10在10种组织器官中的表达量存在显著性差异(P<0.05),其中在肺脏组织中的表达量最高,在小肠和脑中表达量最低。上述结果表明,Grb10可能是猪父源表达的印迹基因,而Asb4则属于猪非印迹基因。
文摘目的:探究跨膜P24转运蛋白10(TMED10)对骨关节炎中转化生长因子-β(TGF-β)/Smads信号通路的影响。方法:将大鼠软骨细胞分为Control组、IL-1β组、NC-sh+IL-1β组、TMED10-sh+IL-1β组、NC-OE+IL-1β组和TMED10-OE+IL-1β组。Control组和IL-1β组细胞不进行转染处理,NC-sh+IL-1β组、TMED10-sh+IL-1β组、NC-OE+IL-1β组和TMED10-OE+IL-1β组细胞分别转染NC-sh、TMED10-sh、NC-OE和TMED10-OE。转染后,除Control组之外,其他组软骨细胞均用白介素-1β(IL-1β)(10 ng/mL)处理24 h模拟OA软骨细胞的病理微环境。通过MTT法检测细胞增殖,通过TUNEL法检测细胞凋亡。采用前交叉韧带切断加内侧半月板部分切除法建立OA大鼠模型,将OA大鼠分为OA组、OA+NC-sh组和OA+TMED10-sh组(n=12),Sham组(n=12)大鼠进行假手术操作。Sham组和OA组大鼠关节腔内注射40μL生理盐水,OA+NC-sh组和OA+TMED10-sh组大鼠关节腔内分别注射40μL的NC-sh和TMED10-sh(滴度为1×10^(9)TU/m L),每周注射1次,共4周。采用番红O/固绿染色法评价膝关节软骨形态,采用TUNEL法检测软骨细胞凋亡。采用RT-qPCR检测软骨细胞和大鼠关节软骨中TMED10的m RNA水平,采用Western blot检测软骨细胞和大鼠关节软骨中TMED10、TGF-β1、Smad2、p-Smad2、Smad3、p-Smad3、Collagen II和MMP-13的蛋白表达水平。结果:与Control组比较,IL-1β组TUNEL阳性率、TMED10 m RNA和TMED10、MMP-13蛋白水平均升高(P<0.05),相对细胞活力以及TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II的蛋白水平均降低(P<0.05)。与IL-1β组和NC-sh+IL-1β组比较,TMED10-sh+IL-1β组TUNEL阳性率、TMED10 m RNA水平和TMED10、MMP-13的蛋白水平均降低(P<0.05),相对细胞活力以及TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II的蛋白水平均升高(P<0.05)。与IL-1β组和NC-OE+IL-1β组比较,TMED10-OE+IL-1β组TUNEL阳性率、TMED10 m RNA水平和TMED10、MMP-13的蛋白水平均升高(P<0.05),相对细胞活力以及TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II的蛋白水平均降低(P<0.05)。与Sham组比较,OA组大鼠的OARSI评分、TUNEL阳性率、TMED10 m RNA水平以及TMED10和MMP-13的蛋白水平均升高(P<0.05),TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II蛋白水平均降低(P<0.05)。与OA组和OA+NC-sh组比较,OA+TMED10-sh组大鼠的OARSI评分、TUNEL阳性率、TMED10 m RNA水平以及TMED10和MMP-13的蛋白水平均降低(P<0.05),TGF-β1、p-Smad2/Smad2、p-Smad3/Smad3和Collagen II蛋白水平均升高(P<0.05)。结论:本研究表明TMED10可能通过抑制TGF-β/Smads信号通路导致软骨细胞丢失和软骨退变,TMED10/TGF-β/Smads信号通路可能是治疗OA的新靶标。
