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The potential mechanism of Isodon suzhouensis against COVID-19 via EGFR/TLR4 pathways
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作者 Hong Duan Wei Wang +7 位作者 Shu Li Han Li Ghulam Jilany Khan Yong Ma Fawang Liu Kefeng Zhai Henggui Hu Zhaojun Wei 《Food Science and Human Wellness》 SCIE CAS CSCD 2024年第6期3245-3255,共11页
Corona Virus Disease 2019(COVID-19)has brought the new challenges to scientific research.Isodon suzhouensis has good anti-inflammatory and antioxidant stress effects,which is considered as a potential treatment for CO... Corona Virus Disease 2019(COVID-19)has brought the new challenges to scientific research.Isodon suzhouensis has good anti-inflammatory and antioxidant stress effects,which is considered as a potential treatment for COVID-19.The possibility for the treatment of COVID-19 with I.suzhouensis and its potential mechanism of action were explored by employing molecular docking and network pharmacology.Network pharmacology and molecular docking were used to screen drug targets,and lipopolysaccharide(LPS)induced RAW264.7 and NR8383 cells inflammation model was used for experimental verification.Collectively a total of 209 possible linkages against 18 chemical components from I.suzhouensis and 1194 COVID-19 related targets were selected.Among these,164 common targets were obtained from the intersection of I.suzhouensis and COVID-19.Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enriched 582 function targets and 87 target proteins pathways,respectively.The results from molecular docking studies revealed that rutin,vitexin,isoquercitrin and quercetin had significant binding ability with 3 chymotrypsin like protease(3CLpro)and angiotensin converting enzyme 2(ACE2).In vitro studies showed that I.suzhouensis extract(ISE)may inhibit the activation of PI3K/Akt pathway and the expression level of downstream proinflammatory factors by inhibiting the activation of epidermal growth factor receptor(EGFR)in RAW264.7 cells induced by LPS.In addition,ISE was able to inhibit the activation of TLR4/NF-κB signaling pathway in NR8383 cells exposed to LPS.Overall,the network pharmacology and in vitro studies conclude that active components from I.suzhouensis have strong therapeutic potential against COVID-19 through multi-target,multi-pathway dimensions and can be a promising candidate against COVID-19. 展开更多
关键词 Isodon suzhouensis COVID-19 Network pharmacology TLR4/NF-κB pathway epidermal growth factor receptor PI3K/Akt pathway
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Forkhead Box q1 promotes invasion and metastasis in colorectal cancer by activating the epidermal growth factor receptor pathway
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作者 Jin-Jin Zhang Chang-Xiong Cao +5 位作者 Li-Lan Wan Wen Zhang Zhong-Jiang Liu Jin-Li Wang Qiang Guo Hui Tang 《World Journal of Gastroenterology》 SCIE CAS 2022年第17期1781-1797,共17页
BACKGROUND Colorectal cancer(CRC)is an extremely malignant tumor with a high mortality rate.Little is known about the mechanism by which forkhead Box q1(FOXQ1)causes CRC invasion and metastasis through the epidermal g... BACKGROUND Colorectal cancer(CRC)is an extremely malignant tumor with a high mortality rate.Little is known about the mechanism by which forkhead Box q1(FOXQ1)causes CRC invasion and metastasis through the epidermal growth factor receptor(EGFR)pathway.AIM To illuminate the mechanism by which FOXQ1 promotes the invasion and metastasis of CRC by activating the heparin binding epidermal growth factor(HB-EGF)/EGFR pathway.METHODS We investigated the differential expression and prognosis of FOXQ1 and HB-EGF in CRC using the Gene Expression Profiling Interactive Analysis(GEPIA)website(http://gepia.cancer-pku.cn/index.html).Quantitative real-time polymerase chain reaction(qRT-PCR)and Western blotting were used to detect the expression of FOXQ1 and HB-EGF in cell lines and tissues,and we constructed a stable lowexpressing FOXQ1 cell line and verified it with the above method.The expression changes of membrane-bound HB-EGF(proHB-EGF)and soluble HB-EGF(sHB-EGF)in the lowexpressing FOXQ1 cell line were detected by flow cytometry and ELISA.Western blotting was used to detect changes in the expression levels of HB-EGF and EGFR pathway-related downstream genes when exogenous recombinant human HB-EGF was added to FOXQ1 knockdown cells.Proliferation experiments,transwell migration experiments,and scratch experiments were carried out to determine the mechanism by which FOXQ1 activates the EGFR signaling pathway through HB-EGF,and then to evaluate the clinical relevance of FOXQ1 and HB-EGF.RESULTS GEPIA showed that the expression of FOXQ1 in CRC tissues was relatively high and was related to a lower overall survival rate.PCR array results showed that FOXQ1 is related to the HB-EGF and EGFR pathways.Knockdown of FOXQ1 suppressed the expression of HB-EGF,and led to a decrease in EGFR and its downstream genes AKT,RAF,KRAS expression levels.After knockdown of FOXQ1 in CRC cell lines,cell proliferation,migration and invasion were attenuated.Adding HB-EGF restored the migration and invasion ability of CRC,but not the cell proliferation ability.Kaplan–Meier survival analysis results showed that the combination of FOXQ1 and HB-EGF may serve to predict CRC survival.CONCLUSION Based on these collective data,we propose that FOXQ1 promotes the invasion and metastasis of CRC via the HB-EGF/EGFR pathway. 展开更多
关键词 Colorectal cancer Forkhead Box Q1 Heparin binding epidermal growth factor epidermal growth factor receptor pathway Migration Invasion
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Effects of (-)-Epigallocatechin gallate on some protein factors involved in the epidermal growth factor receptor signaling pathway
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作者 Yinjiu Huang Ruiqing Xu +3 位作者 Baoan Song Song Yang Li Zhao Shouwei Wu 《Journal of Nanjing Medical University》 2009年第5期293-299,共7页
(-)-Epigallocatechin gallate (EGCG), a major polyphenolic constituent of green tea, can inhibit activity of specific receptor tyrosine kinases (RTKs) and related downstream signal transduction pathways, resultin... (-)-Epigallocatechin gallate (EGCG), a major polyphenolic constituent of green tea, can inhibit activity of specific receptor tyrosine kinases (RTKs) and related downstream signal transduction pathways, resulting in the control of unwanted cell proliferation. The epidermal growth factor receptor (EGFR) signaling pathway is one of the most important pathways that regulates growth, survival,proliferation and differentiation in mammalian cells. This review addresses the effects of EGCG on some protein factors involved in the EGFR signaling pathway in a direct or indirect manner. Based on our understanding of the interaction between EGCG and these factors, and based on their structures, EGCG could be used as a lead compound for designing and synthesizing novel drugs with significant biological activity. 展开更多
关键词 (-)-Epigallocatechin gallate (EGCG) epidermal growth factor receptor egfr Signaling pathway
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Epidermal growth factor receptor:a key manipulator in molecular pathways of malignant glioma
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作者 Changshu Ke 《Oncology and Translational Medicine》 2016年第2期99-103,共5页
The epidermal growth factor receptor (EGFR) is a member of the ErbB/EGFR family, including EGFR/Herl, ErbB2/Her2, ErbB-3/Her3, and ErbB-4/Her4. EGFR exerts its effects through the receptor tyrosine kinase phosphoryl... The epidermal growth factor receptor (EGFR) is a member of the ErbB/EGFR family, including EGFR/Herl, ErbB2/Her2, ErbB-3/Her3, and ErbB-4/Her4. EGFR exerts its effects through the receptor tyrosine kinase phosphorylation and activation of important downstream signaling pathways in normal and neoplastic cells, mainly the Ras GTPase/MAP kinase (MAPK), STAT3, and phosphatidylinositide 3 kinase-AKT pathways. EGFR deregulation is common in malignant glioma, especially primary glioblastoma, and exists in three forms: gene overexpression (amplification), autocrine effects of EGFR activation, and activating receptor mutation (EGFRvlII). However, some EGFR abnormalities have also been found in low-grade gliomas, including the nuclear localization of EGFR, expression in the microfoci of anaplastic transformation, and association with neovascularization in the mesenchyma of the glioma, which suggests that some unknown EGFR-related mechanisms are possibly responsible for its central role in the initiation and progression of malignant glioma. Uncovering these mechanisms will have potential value in the development of radio- therapy, chemotherapy, and EGFR-targeted therapy for glioma. 展开更多
关键词 epidermal growth factor receptor egfr molecular pathways malignant glioma
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Relationship between molecular changes in epidermal growth factor receptor(EGFR)and anaplastic lymphoma kinase(ALK)mutations in lung adenocarcinoma
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作者 Rina Na Wei Luan +3 位作者 Yinzai He Yanwei Gao Nier Cha Baoqin Jia 《Oncology and Translational Medicine》 CAS 2021年第4期155-159,共5页
Objective This study aimed to analyze the relationship between the mutations in epidermal growth factor receptor(EGFR)and anaplastic lymphoma kinase(ALK)and their impact on the prognosis and treatment of lung adenocar... Objective This study aimed to analyze the relationship between the mutations in epidermal growth factor receptor(EGFR)and anaplastic lymphoma kinase(ALK)and their impact on the prognosis and treatment of lung adenocarcinoma.Methods A total of 158 cases of lung adenocarcinoma reported between January 2007 and January 2014 were retrospectively analyzed.These tumors were resected using radical pneumonectomy and underwent pathology-based diagnosis at our institution(Inner Mongolia People’s Hospital,Hohhot,China).The tissue sections were evaluated using the updated World Health Organization classification of lung adenocarcinomas(2015 version),with each histological component recorded in 5%increments.The histological subtypes were classified,and any surviving cases were followed up.The reverse transcription-polymerase chain reaction(RT-PCR)and direct DNA sequencing were used to evaluate mutations in exons 18,19,20,and 21 in the EGFR gene,and the echinoderm microtubule-associated protein-like 4 gene-ALK variant(EML4-ALK)fusions were detected using sequencing.Results Our cohort included 25 patients with pre-invasive adenocarcinoma,13 patients with lepidic,66 patients with acinar,13 patients with papillary,and 25 patients with solid infiltrative adenocarcinoma with the remaining cases presenting with a variety of pathological subtypes.The prognosis of each histological subtype was different with the 5-year disease-free survival and 5-year overall survival(OS)of pre-invasion adenocarcinoma at 100%;the 5-year OS of lepidic,acinar,and papillary adenocarcinoma patients was only 84.6%,72.7%,and 76.9%,respectively.The 5-year OS of solid and mucinous adenocarcinomas were 32.0%and 36.4%,respectively.EGFR mutation was detected in 69 cases with a mutation rate of 43.7%and majority of these mutations were found in exons 19(50.6%)and 21(37.9%),with women and non-smokers shown to experience a higher mutation rate(P<0.05).However,histological subtype analysis showed that EGFR mutations were primarily found in adenocarcinomas.Most of these mutations were found in lepidic(53.8%)or acinar adenocarcinomas(50.0%),whereas these mutations were rare in both solid(28.0%)and mucinous adenocarcinoma(27.2%).The fusion mutation rate in the EML4-ALK gene was 5.69%,and was most common in young,nonsmoking patients(P<0.05).Conclusion The prognosis of patients in each lung adenocarcinoma subtype is different,and these outcomes are likely related to mutations in the EGFR and EML4-ALK genes.EGFR mutation rates are higher in lepidic and acinar adenocarcinomas,whereas EML4-ALK gene fusion mutations are more common in solid and mucinous adenocarcinoma.EGFR mutations are more common in female and non-smoking patients,whereas EML4-ALK fusions are more common in young,non-smoking patients. 展开更多
关键词 lung cancer histological subtypes prognosis the echinoderm microtubule-associated protein-like 4 gene-ALK variant(EML4-ALK) epidermal growth factor receptor(egfr)
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Dihydroergotamine ameliorates liver fibrosis by targeting transforming growth factor β type Ⅱ receptor 被引量:1
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作者 Ke-Xin Zheng Shou-Li Yuan +12 位作者 Meng Dong Han-Lin Zhang Xiao-Xiao Jiang Chun-Long Yan Rong-Cai Ye Hui-Qiao Zhou Li Chen Rui Jiang Zi-Yu Cheng Zhi Zhang Qi Wang Wan-Zhu Jin Wen Xie 《World Journal of Gastroenterology》 SCIE CAS 2023年第20期3103-3118,共16页
BACKGROUND The transforming growth factor β(TGFβ) signaling pathway plays a crucial role in the development of liver fibrosis by activating TGFβ type Ⅱ receptor(TGFβR2), followed by the recruitment of TGFβR1 fin... BACKGROUND The transforming growth factor β(TGFβ) signaling pathway plays a crucial role in the development of liver fibrosis by activating TGFβ type Ⅱ receptor(TGFβR2), followed by the recruitment of TGFβR1 finally triggering downstream signaling pathway.AIM To find drugs targeting TGFβR2 that inhibit TGFβR1/TGFβR2 complex formation, theoretically inhibit TGFβ signaling pathway, and thereby ameliorate liver fibrosis.METHODS Food and Drug Administration-approved drugs were screened for binding affinity with TGFβR2 by virtual molecular docking. We identified 6 candidates and further explored their potential by Cell Counting Kit-8(CCK-8) cell cytotoxic experiment to validate toxicity and titrated the best cellular working concentrations. Next, we further demonstrated the detailed molecular working mechanisms using mutagenesis analysis. Finally, we used a mouse model to investigate its potential anti-liver fibrosis effect.RESULTS We identified 6 drug candidates. Among these 6 drugs, dihydroergotamine(DHE) shows great ability in reducing fibrotic gene expressions such as collagen, p-SMAD3, and α-SMA in TGFβ induced cellular model of liver fibrosis in LX-2 cells. Furthermore, we demonstrated that DHE binds to TGFβR2. Moreover, mutation of Leu27, Phe30, Thr51, Ser52, Ile53, and Glu55 of TGFβR2 disrupted the binding of TGFβR2 with DHE. In addition, DHE significantly improved liver fibrosis, as evidenced by Masson’s trichrome staining of liver sections. This is further supported by the width and the velocity of the portal vein, and serum markers of liver function. In line with those observations, DHE also decreased macrophages infiltration and extracellular matrix deposition in the liver.CONCLUSION DHE alleviates liver fibrosis by binding to TGFβR2 thereby suppressing TGFβ signaling pathway. We show here that as far as drug repurposing, DHE has great potential to treat liver fibrosis. 展开更多
关键词 Liver fibrosis Transforming growth factorβ(TGFβ)signaling pathway TGFβtype II receptor(TGFβR2) Virtual screening Drug-repurposing Dihydroergotamine
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Epidermal growth factor receptor mutation analysis in cytological specimens and responsiveness to gefitinib in advanced non-small cell lung cancer patients 被引量:5
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作者 Lin Li Zijin Zhang +7 位作者 Zhixin Bie Zheng Wang Ping Zhang Xin Nie Yuanming Li Hui Wang Bin Ai Gang Cheng 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2015年第3期294-300,共7页
Background: Epidermal growth factor receptor(EGFR) mutation is the key predictor of EGFR tyrosine kinase inhibitors(TKIs) efficacy in non-small cell lung cancer(NSCLC). We conducted this study to verify the fea... Background: Epidermal growth factor receptor(EGFR) mutation is the key predictor of EGFR tyrosine kinase inhibitors(TKIs) efficacy in non-small cell lung cancer(NSCLC). We conducted this study to verify the feasibility of EGFR mutation analysis in cytological specimens and investigate the responsiveness to gefitinib treatment in patients carrying EGFR mutations.Methods: A total of 210 cytological specimens were collected for EGFR mutation detection by both direct sequencing and amplification refractory mutation system(ARMS). We analyzed EGFR mutation status by both methods and evaluated the responsiveness to gefitinib treatment in patients harboring EGFR mutations by overall response rate(ORR), disease control rate(DCR) and progression free survival(PFS).Results: Of all patients, EGFR mutation rate was 28.6%(60/210) by direct sequencing and 45.2%(95/210) by ARMS(P〈0.001) respectively. Among the EGFR wild type patients tested by direct sequencing, 26.7% of them were positive by ARMS. For the 72 EGFR mutation positive patients treated with gefitinib, the ORR, DCR and median PFS were 69.4%, 90.2% and 9.3 months respectively. The patients whose EGFR mutation status was negative by direct sequencing but positive by ARMS had lower ORR(48.0% vs. 80.9%, P=0.004) and shorter median PFS(7.4 vs. 10.5 months, P=0.009) as compared with that of EGFR mutation positive patients by both detection methods. Conclusions: Our study verified the feasibility of EGFR analysis in cytological specimens in advanced NSCLC. ARMS is more sensitive than direct sequencing in EGFR mutation detection. EGFR Mutation status tested on cytological samples is applicable for predicting the response to gefitinib. Abundance of EGFR mutations might have an influence on TKIs efficacy. 展开更多
关键词 Non-small cell lung cancer (NSCLC) epidermal growth factor receptor egfr mutation cytological specimen amplification refractory mutation system (ARMS) GEFITINIB
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Inhibition of epidermal growth factor receptor signaling protects human malignant glioma cells from hypoxia - induced cell death 被引量:4
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作者 Steinbach JP Klumpp A +1 位作者 Wolburg H Weller M 《中国神经肿瘤杂志》 2004年第1期22-22,共1页
Epidermal growth factor receptor(EGFR)signaling has become an importanttarget for drug development becauseEGFR signaling enhances tumor cell proliferation,migration,and invasion and inhibits apoptosis.However,theresul... Epidermal growth factor receptor(EGFR)signaling has become an importanttarget for drug development becauseEGFR signaling enhances tumor cell proliferation,migration,and invasion and inhibits apoptosis.However,theresults of clinical trials using EGFR inhibitors in patients with solid tumors have been disappointing.Here,wereport a protective effect of the EGFR inhibitors AG1478 and PD153035 against cell death induced by acute hy-poxia,which contrasts with their proapoptotic effects under normoxia.Under hypoxic conditions,both agents re- 展开更多
关键词 egfr Inhibition of epidermal growth factor receptor signaling protects human malignant glioma cells from hypoxia induced cell death
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Plasma fibrinogen levels are associated with epidermal growth factor receptor gene mutation in Chinese patients with non-small cell lung cancer
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作者 Jianfei Zhu Ling Cai +4 位作者 Haoxian Yang Yinsheng Wen Junye Wang Tiehua Rong Lanjun Zhang 《The Chinese-German Journal of Clinical Oncology》 CAS 2013年第5期203-209,共7页
Objective: The plasma fibrinogen levels had not only been used as an independent prognostic parameter for the patients with non-small cell lung cancer (NSCLC), but also as a promising biomarker for evaluating the e... Objective: The plasma fibrinogen levels had not only been used as an independent prognostic parameter for the patients with non-small cell lung cancer (NSCLC), but also as a promising biomarker for evaluating the efficacy of chemotherapy. This study aimed to investigate the correlation between the plasma fibrinogen levels and epidermal growth factor receptor (EGFR) gene mutation and clinical-pathological characteristics of Chinese patients with NSCLC. Methods: In this retrospective study, NSCLC specimens collected from 352 patients between November 2009 and November 2011 were selected to detect EGFR gene mutation with real-time polymerase chain reaction (RT-PCR). In these specimens, 308 ones were also detected EGFR gene copy number with fluorescence in situ hybridization (FISH). Coagulation makers were examined prior to the operations. The association between the plasma fibrinogen levels and EGFR gene mutation and clinical-pathological characteristics were analyzed using SPSS 16.0 software. Results: The median pre-operation plasma fibrinogen level was 3.55 g/L (109/352) patients with higher plasma fibrinogen level (〉 4.0 g/L). The lower plasma fibrinogen levels correlated significantly with EGFR gene mutations (P 〈 0.001), the similar result was seen in platelet counts (P = 0.026). A linear correlation was found between the plasma fibrinogen levels and the platelet counts in NSCLC patients (R^2 = 0.209, P 〈 0.001). Pre-peration plasma fibrinogen levels correlated with gender (P 〈 0.001), smoking status (P 〈 0.001 ), and histology (P 〈 0.001 ). There were significant link between the above clinical-pathological characteristics and EGFR gene mutations. In addition, EGFR gene mutation was correlated with FISH-positive status (P 〈 0.001). Moreover, both plasma fibrinogen level (P = 0.024) and the EGFR gene copy number (P = 0.040) had significant relationships with the pathological TNM stage. Conclusion: This study showed that a significant relevance between plasma fibrinogen levels and EGFR gene mutations. The plasma fibrinogen level might be as a clinical decision parameter for evaluating the efficacy of anti-EGFR tyrosine kinase inhibitors (TKIs) in NSCLC. The patients of NSCLC had higher indicate have poor benefits from anti-EFGR TKIs. In addition, pre-operation plasma fibrinogen level could be used as an indepedent prognostic biomarker for the patients with NSCLC. 展开更多
关键词 plasma fibrinogen levels epidermal growth factor receptor egfr gene mutation non-small cell lung cancerassociation (NSCLC)
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Activation of epidermal growth factor receptor mediates myocardial ischemia/reperfusion arrhythmias in anaesthetized rats
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作者 MEI Feng~2,JI Zhou-xiang~1,QIN Fu~1,LEI Yang~1,HUI Liu~1 (1.Department of Pharmacology,Tongji Medical College, Huazhong University of Science and Technology,Wuhan 4300074 2.Department of Anesthesiology,Union Hospital, Tongji Medical College,Huazhong University of Science and Technology,Wuhan 4300074) 《岭南心血管病杂志》 2011年第S1期222-222,共1页
Objectives Epidermal growth factor receptor (EGFR)is a receptor protein tyrosine kinase and plays a critical role in the development and function of the heart.Previous studies have demonstrated that EGFR is involved... Objectives Epidermal growth factor receptor (EGFR)is a receptor protein tyrosine kinase and plays a critical role in the development and function of the heart.Previous studies have demonstrated that EGFR is involved in regulating electrical excitability of the heart.The present study was designed to investigate whether EGFR activation would mediate myocardial arrhythmias induced by ischemia/reperfu- sion in anaesthetized rats.Methods and results Myocardial ischemia/reperfusion arrhythmias were induced by 10 min ligation of the left anterior descending coronary artery,followed by a 30 min reperfusion in anaesthetized rats.Incidence and severity of cardiac arrhythmias were significantly reduced by pretreatment with the EGFR kinase inhibitor AG556.Phosphorylation level of myocardial EGFR was increased during ischemia and at early reperfusion.Intramyocardial transfection of EGFR siRNA reduced EGFR mRNA and protein,and decreased the incidence of ventricular fibrillation induced by reperfusion.Interestingly,tyrosine phosphorylation levels of cardiac Na<sup>+</sup> channel(I<sub>Na</sub>) and L-type Ca<sup>2+</sup> channel(I<sub>Ca.l</sub>) were significantly increased at corresponding time points to the alteration of phosphorylated EGFR level during reperfusion.AG556 pretreatment countered the increased tyrosine phosphorylation level of Na<sup>+</sup> and L-type Ca<sup>2+</sup> channels induced by reperfusion.No significant alteration was observed in tyrosine phosphorylation levels of cardiac Kv4.2 and Kir2.1 channels during the cardiac ischemia/reperfusion. Conclusions These results demonstrate for the first time that EGFR plays an important role in the genesis of myocardial ischemia/reperfusion arrhythmias,which is likely mediated at least in part by enhancing tyrosine phosphorylation of cardiac Na<sup>+</sup> and L-type Ca<sup>2+</sup> channels. 展开更多
关键词 egfr Activation of epidermal growth factor receptor mediates myocardial ischemia/reperfusion arrhythmias in anaesthetized rats
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Effect of miR-124 Overexpression under Wnt/β-catenin Signaling Pathway on Inflammatory Factor and Epidermal Growth Factor in Rats with Precancerous Gastric Lesions
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作者 ZHOU Li-jiang 《Chinese Journal of Biomedical Engineering(English Edition)》 CAS 2024年第1期17-26,共10页
Objective:To investigate the effects of miR-124 overexpression on inflammatory factors and epidermal growth factor in rats with gastric precancerous lesions by modulating the Wnt/β-catenin signaling pathway.Methods:E... Objective:To investigate the effects of miR-124 overexpression on inflammatory factors and epidermal growth factor in rats with gastric precancerous lesions by modulating the Wnt/β-catenin signaling pathway.Methods:Eighty SPF-grade Wistar rats were selected as the research subjects.After adaptive feeding,they were divided into 4 groups using a random number table method.The control group was fed a regular diet,while the model group,low expression group,and overexpression group of rats were treated with N-methyl-N’-nitro-N-nitrosoguanidine to establish a model of gastric cancer precancerous lesions.After successful modeling,the control group and model group rats were injected intraperitoneally with 0.9%sodium chloride solution,the low-expression group rats were injected intraperitoneally with miR-124-5p inhibitor,and the over-expression group rats were injected intraperitoneally with miR-124-5p mimic.After 8 weeks of continuous injection,the levels of miR-124,Wnt/β-catenin signaling pathway-related proteins,inflammatory factors,and epidermal growth factor were observed and compared among the four groups of rats.Results:The differences in the relative expression of miR-124 among the four groups of rats were statistically significant(P<0.05);the differences in the expression of Wnt protein andβ-catenin protein among the four groups of rats were statistically significant(P<0.05),and the expression of Wnt protein andβ-catenin protein in the overexpression group was significantly higher than that of the control group,and significantly lower than that in the model group and the low-expression group;the levels of IL-1β,IL-6,and TNF-αof rats in the four groups of rats IL-1β,IL-6 and TNF-αlevels were statistically different(P<0.05),and the levels of IL-1β,IL-6 and TNF-αin rats in the overexpression group were higher than those in the model group and significantly lower than those in the model group and the low-expression group(P<0.05);the differences in the levels of EGF,HER1 and HER2 among the four groups of rats were statistically different(P<0.05),and the levels of EGF levels were higher than those of the control group,and EGF and HER1 were significantly lower than those of the model and low expression groups(P<0.05).Conclusion:Mi R-124 overexpression helps to reduce gastric mucosal damage and inflammatory response in rats with gastric precancerous lesions,and its mechanism of action may be linked to the inhibition of the Wnt/β-catenin signaling pathway. 展开更多
关键词 precancerous lesions of the stomach Wnt/β-catenin signal pathway miR-124 inflammatory factor epidermal growth factor
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非小细胞肺癌EGFR基因少见突变P733L对第1代和第3代EGFR-TKI敏感性的研究
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作者 车娟娟 王婧 +3 位作者 甄洪超 林海珊 尚昆 俞静 《中国医院用药评价与分析》 2024年第7期774-777,782,共5页
目的:探讨表皮生长因子受体(EGFR)基因少见突变P733L对第1代和第3代EGFR酪氨酸激酶抑制剂(EGFR-TKI)的敏感性。方法:通过四唑盐比色法和平板克隆实验分析EGFR L858R和P733L肺癌细胞对第1代和第3代EGFR-TKI的敏感性;通过Transwell实验分... 目的:探讨表皮生长因子受体(EGFR)基因少见突变P733L对第1代和第3代EGFR酪氨酸激酶抑制剂(EGFR-TKI)的敏感性。方法:通过四唑盐比色法和平板克隆实验分析EGFR L858R和P733L肺癌细胞对第1代和第3代EGFR-TKI的敏感性;通过Transwell实验分析第1代和第3代EGFR-TKI对EGFR L858R和P733L肺癌细胞迁移的抑制作用;通过检测凋亡蛋白分析第1代和第3代EGFR-TKI促进EGFR L858R和P733L肺癌细胞凋亡的作用。结果:第1代和第3代EGFR-TKI对EGFR L858R和P733L细胞的增殖、克隆形成和细胞迁移都有抑制作用。与EGFR野生型肺癌细胞相比,第1代和第3代EGFR-TKI处理后,EGFR L858R和P733L细胞的EGFR激酶活性受到抑制,细胞凋亡明显增加。结论:EGFR P733L突变细胞对第1代和第3代EGFR-TKI的敏感性与EGFR L858R突变细胞的敏感性相似,本研究为EGFR基因少见突变从EGFR-TKI治疗中获益提供了实验证据。 展开更多
关键词 非小细胞肺癌 表皮生长因子受体酪氨酸激酶抑制剂 egfr少见突变 egfr P733L 药物敏感性
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稳定过表达犬EGFR蛋白的MDCK细胞的建立及其对凋亡和细胞周期的影响
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作者 杨迪 黄玲巍 +2 位作者 杨雅雯 乔自林 王家敏 《华北农学报》 CSCD 北大核心 2024年第4期223-230,共8页
表皮生长因子受体(EGFR)在许多实体肿瘤中过度表达,建立稳定过表达犬EGFR蛋白的MDCK细胞株,有利于为研究犬或人类肿瘤疾病提供良好的细胞模型和研究基础。首先制备目的片段以构建EGFR基因过表达载体,与慢病毒包装载体共同转染至293T细胞... 表皮生长因子受体(EGFR)在许多实体肿瘤中过度表达,建立稳定过表达犬EGFR蛋白的MDCK细胞株,有利于为研究犬或人类肿瘤疾病提供良好的细胞模型和研究基础。首先制备目的片段以构建EGFR基因过表达载体,与慢病毒包装载体共同转染至293T细胞中,48 h后提取上清液经纯化获得EGFR基因过表达慢病毒液。将其转染至MDCK细胞中,经嘌呤霉素筛选和单细胞克隆后观察感染效率,RT-qPCR和Western Blot、间接免疫荧光分别检测基因及蛋白的表达,建立EGFR蛋白过表达MDCK细胞株。使用流式细胞仪分别检测过表达及对照细胞株的细胞凋亡和细胞周期。犬EGFR基因位于18号染色体,由编码跨膜糖蛋白的30个外显子组成。经反应体系,PCR产物交换入线性化表达载体,获得了阳性转化子8个,大小为738 bp。所获EGFR基因过表达慢病毒滴度为3.5×10^(8 )TU/mL。转染MDCK细胞后在荧光显微镜下观察荧光效果显著,经检测EGFR基因及其蛋白在细胞中的表达量显著升高。间接免疫荧光试验显示,EGFR在细胞中表达明显增强。过表达细胞的早期凋亡率和晚期凋亡率显著上升,且在G2/M期发生阻滞。成功建立一株稳定的犬EGFR过表达MDCK细胞株,犬EGFR的过表达催化了细胞分裂,使DNA复制加快,同时刺激了细胞凋亡。 展开更多
关键词 犬肾细胞系 表皮生长因子受体 慢病毒载体
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Fibroblast growth factor receptor signaling as therapeutic targets in gastric cancer 被引量:9
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作者 Masakazu Yashiro Tasuku Matsuoka 《World Journal of Gastroenterology》 SCIE CAS 2016年第8期2415-2423,共9页
Fibroblast growth factor receptors(FGFRs) regulate a variety of cellular functions, from embryogenesis to adult tissue homeostasis. FGFR signaling also plays significant roles in the proliferation, invasion, and survi... Fibroblast growth factor receptors(FGFRs) regulate a variety of cellular functions, from embryogenesis to adult tissue homeostasis. FGFR signaling also plays significant roles in the proliferation, invasion, and survival of several types of tumor cells. FGFR-induced alterations, including gene amplification, chromosomal translocation, and mutations, have been shown to be associated with the tumor initiation and progression of gastric cancer, especially in diffuse-type cancers. Therefore, the FGFR signaling pathway might be one of the therapeutic targets in gastric cancer. This review aims to provide an overview of the role of FGFR signaling in tumorigenesis, tumor progression, proliferation, and chemoresistance. We also discuss the accumulating evidence that demonstrates the effectiveness of using clinical therapeutic agents to inhibit FGFR signaling for the treatment of gastric cancer. 展开更多
关键词 FIBROBLAST growth factor receptor GASTRIC cancer SIGNALING pathway TARGETED therapy
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达可替尼联合卡瑞利珠单抗治疗EGFR突变局部晚期NSCLC的临床疗效及安全性研究
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作者 李秀林 李明伟 +1 位作者 陈婷婷 孙李凌 《海南医学》 CAS 2024年第18期2595-2600,共6页
目的探究达可替尼联合卡瑞利珠单抗(Cam)治疗表皮生长因子受体(EGFR)突变局部晚期非小细胞肺癌(NSCLC)的临床疗效及安全性。方法选取2022年1月至2023年11月濮阳市安阳地区医院收治的98例EGFR突变局部晚期NSCLC患者纳入研究,采用简单随... 目的探究达可替尼联合卡瑞利珠单抗(Cam)治疗表皮生长因子受体(EGFR)突变局部晚期非小细胞肺癌(NSCLC)的临床疗效及安全性。方法选取2022年1月至2023年11月濮阳市安阳地区医院收治的98例EGFR突变局部晚期NSCLC患者纳入研究,采用简单随机化法分为对照组和研究组各49例。对照组患者给予达可替尼治疗,研究组患者给予达可替尼联合Cam治疗,21 d为一个周期,均治疗4个周期。比较两组患者的治疗效果,以及治疗前、治疗2个周期、治疗4个周期后的T淋巴细胞亚群(CD3+、CD4+、CD4+/CD8+)、血管生长因子[血小板衍生生长因子(PDGF)、血管内皮生长因子(VEGF)、碱性成纤维细胞生长因子(bFGF)]、预后相关标志物[微小RNA(miRNA)-137-3p、miR-1255b-5p、miR-379-5p]、体能状态[卡氏功能状态(KPS)]和生存质量[肺癌患者生存质量评定量表(FACT-L)],并比较两组患者治疗期间的不良反应发生率。结果研究组患者的客观缓解率(ORR)为85.71%,明显高于对照组的67.35%,差异有统计学意义(P<0.05);治疗2个周期、4个周期后,研究组患者的外周血CD3+、CD4+、CD4+/CD8+水平分别为(53.63±4.58)%和(51.25±4.13)%、(35.47±3.12)%和(33.96±2.83)%、1.59±0.21和1.45±0.17,明显高于对照组的(51.45±4.23)%和(49.17±4.19)%、(33.82±3.07)%和(32.42±2.91)%、1.47±0.20和1.37±0.19,差异均有统计学意义(P<0.05);治疗2个周期、4个周期后,研究组患者的血清PDGF、VEGF、bFGF水平分别为(1.58±0.18)ng/mL和(1.13±0.09)ng/mL、(31.38±3.74)ng/L和(23.19±2.41)ng/L、(184.99±26.12)pg/mL、(135.39±19.24)pg/mL,明显低于对照组的(1.69±0.19)ng/mL和(1.21±0.13)ng/mL、(34.12±3.81)ng/L和(27.36±2.68)ng/L、(207.16±27.73)pg/mL和(172.61±23.85)pg/mL,差异均有统计学意义(P<0.05);治疗2个周期、4个周期后,研究组患者的血清miR-137-3p、miR-379-5p、miR-1255b-5p水平分别为0.68±0.15和0.71±0.19、0.53±0.12和0.65±0.15、0.40±0.09和0.49±0.11,明显高于对照组的0.55±0.14和0.63±0.18、0.46±0.11和0.57±0.13、0.35±0.08和0.44±0.10,差异均有统计学意义(P<0.05);治疗2个周期、4个周期后,研究组患者的KPS评分、FACT-L评分分别为(80.01±2.67)分和(82.64±2.79)分、(84.29±8.14)分和(102.93±9.64)分,明显高于对照组的(78.39±2.65)分和(80.92±2.73)分、(74.05±7.86)分和(85.24±8.19)分,差异均有统计学意义(P<0.05);治疗期间,研究组患者的不良反应总发生率为26.53%,略低于对照组的40.82%,但差异无统计学意义(P>0.05)。结论达可替尼联合Cam治疗EGFR突变局部晚期NSCLC患者的疗效显著,其可改善患者免疫功能,抑制肿瘤血管生长因子,有助于改善患者预后,提高患者生存质量及体能状态,且安全性良好。 展开更多
关键词 达可替尼 卡瑞利珠单抗 非小细胞肺癌 T淋巴细胞亚群 生存质量 表皮生长因子受体突变
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柠檬醛通过EGFR信号通路抑制NCI-H1975细胞增殖
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作者 朱威巍 聂妍 +4 位作者 翁大志 李艳丽 王宣军 黄业伟 范源洪 《食品研究与开发》 CAS 2024年第21期63-67,共5页
该文探究柠檬醛是否通过表皮生长因子受体(epidermal growth factor receptor,EGFR)信号通路诱导非小细胞肺癌(non-small cell lung cancer,NSCLC)系中NCI-H1975细胞增殖。主要采用噻唑蓝(methyl thiazolyl tetrazolium,MTT)法检测细胞... 该文探究柠檬醛是否通过表皮生长因子受体(epidermal growth factor receptor,EGFR)信号通路诱导非小细胞肺癌(non-small cell lung cancer,NSCLC)系中NCI-H1975细胞增殖。主要采用噻唑蓝(methyl thiazolyl tetrazolium,MTT)法检测细胞毒性、流式细胞术检测细胞凋亡率、分子对接探究柠檬醛与EGFR蛋白结合位点,通过蛋白质免疫印迹法(Western Blot)检测柠檬醛对EGFR及其下游细胞外调节蛋白激酶(extracellular regulated protein kinases,ERK)蛋白表达的影响。研究结果显示柠檬醛在NCI-H1975细胞系上IC50值为114.5μmol/L,且100μmol/L的柠檬醛已对NCIH1975细胞的增殖产生显著抑制作用(P<0.05),呈浓度依赖性抑制细胞增殖;流式结果显示柠檬醛可增大细胞凋亡率,促进细胞凋亡;Western Blot检测结果表明,柠檬醛在100μmol/L时对EGFR/ERK蛋白磷酸化表达有显著抑制作用(P<0.05)。综上,柠檬醛可抑制NCI-H1975细胞增殖并能促进凋亡,通过抑制EGFR信号通路传导进而发挥作用。 展开更多
关键词 柠檬醛 NCI-H1975 表皮生长因子受体 细胞增殖 细胞凋亡
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循环CD4^(+)CD45RA^(+)CD62L^(+)T细胞与接受EGFR-TKI治疗的转移性非小细胞肺癌预后相关
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作者 操辰新 唐辉 +4 位作者 耿瑞璇 郭伏平 白春梅 王颖轶 李太生 《基础医学与临床》 CAS 2024年第5期658-664,共7页
目的探索外周血循环淋巴细胞的基线水平及动态变化与接受表皮生长因子受体酪氨酸激酶抑制剂(EGFR-TKI)治疗的EGFR突变阳性的转移性非小细胞肺癌患者预后之间的相关性。方法设计一个回顾性队列,包括在北京协和医院接受EGFR-TKI治疗的40... 目的探索外周血循环淋巴细胞的基线水平及动态变化与接受表皮生长因子受体酪氨酸激酶抑制剂(EGFR-TKI)治疗的EGFR突变阳性的转移性非小细胞肺癌患者预后之间的相关性。方法设计一个回顾性队列,包括在北京协和医院接受EGFR-TKI治疗的40例非小细胞肺癌患者。在EGFR-TKI治疗期间,使用流式细胞仪测量术收集外周血循环淋巴细胞亚群进行动态监测,并通过电话随访每位患者的生存情况,分别比较基线以及治疗1月后外周血循环淋巴细胞亚群与无进展生存期(PFS)和总生存期(OS)的关系。结果在接受EGFR-TKI治疗的患者中,更高的基线循环CD4^(+)CD45RA^(+)CD62L^(+)T细胞计数与更高的肿瘤治疗应答相关(P<0.001)。整个人群的PFS为27.1个月,而OS未达到。然而,基线CD4^(+)CD45RA^(+)CD62L^(+)T细胞计数与中位PFS无相关性。此外,在EGFR-TKI治疗期间,CD4^(+)CD45RA^(+)CD62L^(+)T细胞计数稳定或升高的患者的PFS明显长于CD4^(+)CD45RA^(+)CD62L^(+)T细胞计数降低的患者(29.1个月对比9.4个月;P<0.001)。结论更高的基线循环CD4^(+)CD45RA^(+)CD62L^(+)T细胞计数与更好的EGFR-TKI治疗应答相关,CD4^(+)CD45RA^(+)CD62L^(+)T细胞计数的动态变化与PFS延长有关。 展开更多
关键词 表皮生长因子受体酪氨酸激酶抑制剂(egfr-TKI) 淋巴细胞亚群 肺癌 CD4^(+)CD45RA^(+)CD62L^(+)T细胞 预后
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第三代EGFR-TKI耐药性机制及联合用药治疗的策略 被引量:1
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作者 周建宇 秦晓红 米立志 《中国生物化学与分子生物学报》 CAS CSCD 北大核心 2024年第2期170-179,共10页
表皮生长因子受体(epidermal growth factor receptor,EGFR)是一种受体酪氨酸激酶,参与如细胞的增殖、分裂和分化等生理过程,并在肿瘤的发生和发展中发挥重要作用。在非小细胞肺癌的靶向治疗中,靶向表皮生长因子受体的酪氨酸激酶抑制剂(... 表皮生长因子受体(epidermal growth factor receptor,EGFR)是一种受体酪氨酸激酶,参与如细胞的增殖、分裂和分化等生理过程,并在肿瘤的发生和发展中发挥重要作用。在非小细胞肺癌的靶向治疗中,靶向表皮生长因子受体的酪氨酸激酶抑制剂(tyrosine kinase inhibitor,TKI)取得了显著疗效。然而,伴随着EGFR T790M等突变的出现,患者会对第一代和第二代EGFR-TKI治疗产生耐药性。为此,开发的以奥希替尼(Osimertinib)为代表的第三代EGFR-TKI,在治疗携带EGFR T790M突变患者的耐药中取得了良好效果。但部分接受第三代EGFR-TKI治疗的患者仍会产生获得性耐药。目前,已知的耐药机制主要分为EGFR依赖型(EGFR自身激酶结构域突变)和EGFR非依赖型(异常旁路信号的激活、下游信号通路的激活、组织学表型转变)两类。本文对EGFR及第三代EGFR-TKI药物结构、主要的耐药机制和耐药后的治疗策略进行了全面综述与总结,并对未来克服EGFR-TKI耐药性的可能方向进行了分析。 展开更多
关键词 表皮生长因子受体 酪氨酸激酶抑制剂 奥希替尼 耐药机制 联合用药
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EGFR突变的晚期肺腺癌患者EGFR-TKIs治疗过程中脑转移的危险因素分析
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作者 靳俊杰 刘兆良 +2 位作者 狄艳青 曹涤非 李丽 《河北医药》 CAS 2024年第16期2423-2426,2431,共5页
目的 评估表皮生长因子受体(EGFR)突变的晚期肺腺癌患者酷氨酸激酶抑制剂(EGFR-TKIs)治疗过程中脑转移的危险因素研究,为临床诊治提供参考。方法 回顾性分析2018年1月至2020年1月收治的134例EGFR突变晚期肺腺癌患者的临床资料,均随访至2... 目的 评估表皮生长因子受体(EGFR)突变的晚期肺腺癌患者酷氨酸激酶抑制剂(EGFR-TKIs)治疗过程中脑转移的危险因素研究,为临床诊治提供参考。方法 回顾性分析2018年1月至2020年1月收治的134例EGFR突变晚期肺腺癌患者的临床资料,均随访至2023年4月30日。用Kaplan-Meier法计算脑转移的累积发病率,用多因素Cox回归分析脑转移的独立危险因素。结果 34例患者(25.4%)在EGFR-TKIs治疗过程中发生脑转移。多因素分析显示年龄≤53岁(HR:2.751,95%CI:1.326~5.707;P=0.007)、血清癌胚抗原≥23 ng/mL(HR:3.197,95%CI:1.512~6.758;P=0.002)和EGFR21外显子突变(HR:2.769,95%CI:1.355~5.659;P=0.005)是发生脑转移的独立高危因素。结论 EGFR突变的晚期肺腺癌患者EGFR-TKIs治疗过程中脑转移的危险因素较多,临床上值得注意。 展开更多
关键词 egfr突变 晚期肺腺癌 egfr-TKIs治疗 脑转移
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阿帕替尼联合埃克替尼治疗EGFR基因21号外显子L858R突变型NSCLC的临床观察
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作者 罗娜 马慧丽 杨启 《实用癌症杂志》 2024年第4期594-597,共4页
目的探究对表皮生长因子受体(EGFR)基因21号外显子L858R突变型非小细胞肺癌(NSCLC)采用阿帕替尼联合埃克替尼治疗的临床效果。方法将EGFR基因21号外显子L858R突变型NSCLC患者101例按随机数表法分为观察组(n=51)与对照组(n=50)。观察组... 目的探究对表皮生长因子受体(EGFR)基因21号外显子L858R突变型非小细胞肺癌(NSCLC)采用阿帕替尼联合埃克替尼治疗的临床效果。方法将EGFR基因21号外显子L858R突变型NSCLC患者101例按随机数表法分为观察组(n=51)与对照组(n=50)。观察组采用阿帕替尼联合埃克替尼治疗,对照组仅采用埃克替尼治疗,治疗时间为56 d,2个周期。比较2组近期疗效、不良反应,并采用K-M生存分析曲线图分析2组远期疗效。结果观察组与对照组的客观缓解率(ORR)(74.51%vs 74.00%)与疾病控制率(DCR)(92.16%vs 94.00%)差异均无统计学意义(P>0.05);治疗期间2组未出现2级以上不良反应,观察组高血压和蛋白尿发生率分别为52.94%、50.98%,分别高于对照组的16.00%、10.00%,差异有统计学意义(P<0.05)。观察组生存率显著高于对照组(69.3%vs 43.1%),差异有统计学意义(P<0.05)。结论EGFR基因21号外显子L858R突变型NSCLC采用阿帕替尼联合埃克替尼治疗,可延长患者的无进展生存时间,不良反应的发生可接受。 展开更多
关键词 非小细胞肺癌 阿帕替尼 埃克替尼 表皮生长因子受体 21号外显子L858R突变型
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