OBJECTIVE To investigate the role of connexin proteins(Cx),which form gap junctions(GJ),in progression and chemotherapeutic sensitivity of cervical cancer(CaC x).METHODS We analyze the expression of Cx26,Cx30,Cx32 and...OBJECTIVE To investigate the role of connexin proteins(Cx),which form gap junctions(GJ),in progression and chemotherapeutic sensitivity of cervical cancer(CaC x).METHODS We analyze the expression of Cx26,Cx30,Cx32 and Cx43 in human specimens consisting of:Normal cervix(n=78),CaCx FIGO stageⅠ(n=148),CaCx FIGO stageⅡ(n=165).In CaCx cell lines,Hela-Cx32(induced expression by doxycycline),C-33A(endogenously express Cx32)and si Ha(transiently transfected plasmid with Cx32),we detected the role of Cx32 against tostreptonigrin/cisplatin-induced apopotosisin presence or absence of functional GJ through using GJ inhibitors or low density cultural.Furtherly,we observed the relativity of Cx32 and EGFR expression in human specimens.Also,we detected the role of EGFR signaling pathway in the process of Cx32 anti-apoptosis through suppressed EGFR expression by inhibitors or si RNA sequences in cell lines.RESULTS We firstly demonstrated the expression of Cx32 was highly upregulated and accumulated in cytoplasm in the CaCx specimens,and the degree of upregulation correlated with advanced FIGO stages.Thus,in three human cervical cell lines,Cx32 was shown to suppress apoptosis when GJ formation is inhibited.No matter in cases of CaCx or cell lines,Cx32 expression was highly correlated with expression of EGFR and the EGFR pathway is an essential component of the Cx32-induced anti-apoptotic effect.CONCLUSION Cx32,traditionally tumor suppressive protein,was shown to be tumor protective against chemotherapy through EGFR pathway in a GJ-independent way.展开更多
目的基于病例报告和病例系列研究,系统评价酪氨酸激酶抑制剂(TKIs)致肝损伤后替换为同类药物的安全性和有效性。方法检索PubMed、Embase、Cochrane、Web of Science、中国知网(CNKI)、万方和维普数据库,检索时限均为建库至2023年10月。...目的基于病例报告和病例系列研究,系统评价酪氨酸激酶抑制剂(TKIs)致肝损伤后替换为同类药物的安全性和有效性。方法检索PubMed、Embase、Cochrane、Web of Science、中国知网(CNKI)、万方和维普数据库,检索时限均为建库至2023年10月。由2位评价员独立筛选文献、提取数据,评价纳入文献质量,对结果数据进行描述性或统计性分析。结果纳入26项研究(22个病例报告和4个病例系列),共计75例患者使用TKIs致肝损伤后替换为同类药物,主要涉及的作用靶点为表皮生长因子受体(EGFR)、间变性淋巴瘤激酶(ALK)和多靶点。大部分患者换药后安全性良好,肝功能正常或无严重肝损伤,仅1例患者报告严重肝脏不良反应(3级总胆红素升高);临床疗效方面,大部分患者对换用的TKIs应答良好,在随访时间内治疗结局评估为稳定或无疾病进展,仅2例吉非替尼替换为厄洛替尼患者因发生非肝损伤相关不良反应而减量后疾病进展、1例厄洛替尼替换为阿法替尼患者出现肿瘤症状加重。结论已发表的病例报告和病例系列证据表明,靶向EGFR、ALK和多靶点的TKIs致肝损伤后替换为同类药物继续治疗,具有一定安全性、有效性和临床可实践性,可作为TKIs肝损伤停药后的应对策略之一。但目前尚无指南共识在替换药物选择、给药时机和剂量方案等方面作出明确推荐,亟待更多研究进一步探索。展开更多
Momordica antiviral protein 30 kD(MAP30)is a type I ribosome-inactivating protein(RIP)with antibacterial,anti-HIV and antitumor activities but lacks the ability to target tumor cells.To increase its tumor-targeting ab...Momordica antiviral protein 30 kD(MAP30)is a type I ribosome-inactivating protein(RIP)with antibacterial,anti-HIV and antitumor activities but lacks the ability to target tumor cells.To increase its tumor-targeting ability,the arginine-glycine-aspartic(RGD)peptide and the epidermal growth factor receptor interference(EGFRi)peptide were fused with MAP30,which was named ELRL-MAP30.The efficiency of targeted therapy for triple-negative breast cancer(TNBC)MDA-MB-231 cells,which lack the expression of estrogen receptor(ER),Progesterone receptor(PgR)and human epidermal growth factor receptor-2(HER2),is limited.In this study,we focus on exploring the effect and mechanism of ELRL-MAP30 on TNBC MDA-MB-231 cells.First,we discovered that ELRL-MAP30 significantly inhibited the migration and invasion of MDA-MB-231 cells and induced MDA-MB-231 cell apoptosis.Moreover,ELRL-MAP30 treatment resulted in a significant increase in Bax expression and a decrease in Bcl-2 expression.Furthermore,ELRL-MAP30 triggered apoptosis via the Fak/EGFR/Erk and Ilk/Akt signaling pathways.In addition,recombinant ELRL-MAP30 can inhibit chicken embryonic angiogenesis,and also inhibit the tube formation ability of human umbilical vein endothelial cells(HUVECs),indicating its potential therapeutic effects on tumor angiogenesis.Collectively,these results indicate that ELRL-MAP30 has significant tumor-targeting properties in MDA-MB-231 cancer cells and reveals potential therapeutic effects on angiogenesis.These findings indicate the potential role of ELRL-MAP30 in the targeted treatment of the TNBC cell line MDA-MB-231.展开更多
抗体药物偶联物(antibody drug conjugates,ADCs)是一类新型的抗肿瘤药物,兼具有靶向药物的特异性和化疗药物的高度抗肿瘤活性,极具临床应用前景。近年来,乳腺癌的治疗正进入ADCs治疗时代,以恩美曲妥珠单抗、德曲妥珠单抗等为代表的ADCs...抗体药物偶联物(antibody drug conjugates,ADCs)是一类新型的抗肿瘤药物,兼具有靶向药物的特异性和化疗药物的高度抗肿瘤活性,极具临床应用前景。近年来,乳腺癌的治疗正进入ADCs治疗时代,以恩美曲妥珠单抗、德曲妥珠单抗等为代表的ADCs,为人表皮生长因子受体2(human epidermal growth factor receptor 2,HER2)阳性乳腺癌患者的治疗带来了新的突破。此外,ADCs的出现,引入了“HER2低表达(HER2-low)”的概念,并为HER2-low的乳腺癌患者带来了生存获益。本综述重点探讨了ADCs在治疗HER2表达乳腺癌中的应用进展。展开更多
基金supported by National Nature Science Foundation of China(U1303221)National Natural Science Foundation of China(81373439,81473234)Construction of Technique Plate for Evaluation of the Pharmacodynamics of New Drugs in Xinjiang from the Department of Science and Technology of Xinjiang Province(201233150)
文摘OBJECTIVE To investigate the role of connexin proteins(Cx),which form gap junctions(GJ),in progression and chemotherapeutic sensitivity of cervical cancer(CaC x).METHODS We analyze the expression of Cx26,Cx30,Cx32 and Cx43 in human specimens consisting of:Normal cervix(n=78),CaCx FIGO stageⅠ(n=148),CaCx FIGO stageⅡ(n=165).In CaCx cell lines,Hela-Cx32(induced expression by doxycycline),C-33A(endogenously express Cx32)and si Ha(transiently transfected plasmid with Cx32),we detected the role of Cx32 against tostreptonigrin/cisplatin-induced apopotosisin presence or absence of functional GJ through using GJ inhibitors or low density cultural.Furtherly,we observed the relativity of Cx32 and EGFR expression in human specimens.Also,we detected the role of EGFR signaling pathway in the process of Cx32 anti-apoptosis through suppressed EGFR expression by inhibitors or si RNA sequences in cell lines.RESULTS We firstly demonstrated the expression of Cx32 was highly upregulated and accumulated in cytoplasm in the CaCx specimens,and the degree of upregulation correlated with advanced FIGO stages.Thus,in three human cervical cell lines,Cx32 was shown to suppress apoptosis when GJ formation is inhibited.No matter in cases of CaCx or cell lines,Cx32 expression was highly correlated with expression of EGFR and the EGFR pathway is an essential component of the Cx32-induced anti-apoptotic effect.CONCLUSION Cx32,traditionally tumor suppressive protein,was shown to be tumor protective against chemotherapy through EGFR pathway in a GJ-independent way.
文摘目的基于病例报告和病例系列研究,系统评价酪氨酸激酶抑制剂(TKIs)致肝损伤后替换为同类药物的安全性和有效性。方法检索PubMed、Embase、Cochrane、Web of Science、中国知网(CNKI)、万方和维普数据库,检索时限均为建库至2023年10月。由2位评价员独立筛选文献、提取数据,评价纳入文献质量,对结果数据进行描述性或统计性分析。结果纳入26项研究(22个病例报告和4个病例系列),共计75例患者使用TKIs致肝损伤后替换为同类药物,主要涉及的作用靶点为表皮生长因子受体(EGFR)、间变性淋巴瘤激酶(ALK)和多靶点。大部分患者换药后安全性良好,肝功能正常或无严重肝损伤,仅1例患者报告严重肝脏不良反应(3级总胆红素升高);临床疗效方面,大部分患者对换用的TKIs应答良好,在随访时间内治疗结局评估为稳定或无疾病进展,仅2例吉非替尼替换为厄洛替尼患者因发生非肝损伤相关不良反应而减量后疾病进展、1例厄洛替尼替换为阿法替尼患者出现肿瘤症状加重。结论已发表的病例报告和病例系列证据表明,靶向EGFR、ALK和多靶点的TKIs致肝损伤后替换为同类药物继续治疗,具有一定安全性、有效性和临床可实践性,可作为TKIs肝损伤停药后的应对策略之一。但目前尚无指南共识在替换药物选择、给药时机和剂量方案等方面作出明确推荐,亟待更多研究进一步探索。
文摘Momordica antiviral protein 30 kD(MAP30)is a type I ribosome-inactivating protein(RIP)with antibacterial,anti-HIV and antitumor activities but lacks the ability to target tumor cells.To increase its tumor-targeting ability,the arginine-glycine-aspartic(RGD)peptide and the epidermal growth factor receptor interference(EGFRi)peptide were fused with MAP30,which was named ELRL-MAP30.The efficiency of targeted therapy for triple-negative breast cancer(TNBC)MDA-MB-231 cells,which lack the expression of estrogen receptor(ER),Progesterone receptor(PgR)and human epidermal growth factor receptor-2(HER2),is limited.In this study,we focus on exploring the effect and mechanism of ELRL-MAP30 on TNBC MDA-MB-231 cells.First,we discovered that ELRL-MAP30 significantly inhibited the migration and invasion of MDA-MB-231 cells and induced MDA-MB-231 cell apoptosis.Moreover,ELRL-MAP30 treatment resulted in a significant increase in Bax expression and a decrease in Bcl-2 expression.Furthermore,ELRL-MAP30 triggered apoptosis via the Fak/EGFR/Erk and Ilk/Akt signaling pathways.In addition,recombinant ELRL-MAP30 can inhibit chicken embryonic angiogenesis,and also inhibit the tube formation ability of human umbilical vein endothelial cells(HUVECs),indicating its potential therapeutic effects on tumor angiogenesis.Collectively,these results indicate that ELRL-MAP30 has significant tumor-targeting properties in MDA-MB-231 cancer cells and reveals potential therapeutic effects on angiogenesis.These findings indicate the potential role of ELRL-MAP30 in the targeted treatment of the TNBC cell line MDA-MB-231.
