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
Gastrin and cyclooxygenase-2(COX-2) playimportant roles in the carcinogenesis and progression ofgastric cancer.However,it remains unknown whether the combination of cholecystokinin-2(CCK-2) receptor antagonist plus CO...Gastrin and cyclooxygenase-2(COX-2) playimportant roles in the carcinogenesis and progression ofgastric cancer.However,it remains unknown whether the combination of cholecystokinin-2(CCK-2) receptor antagonist plus COX-2 inhibitor exerts synergistic anti-tumor effects on human gastric cancer.Here,we demonstrated that the combination of AG-041R(a CCK-2 receptor antagonist) plus NS-398(a selective COX-2 inhibitor) treatment had synergistic effects on proliferation inhibition,apoptosis induction,down-regulation of Bcl-2 and up-regulation of Bax expression in MKN-45 cells.These results indicate that simultaneous targeting of CCK-2 receptor and COX-2 may inhibit gastric cancer development more effectively than targeting either molecule alone.(C)2008 Elsevier Ireland Ltd.All rights reserved.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Gastrin and cyclooxygenase-2(COX-2) playimportant roles in the carcinogenesis and progression ofgastric cancer.However,it remains unknown whether the combination of cholecystokinin-2(CCK-2) receptor antagonist plus COX-2 inhibitor exerts synergistic anti-tumor effects on human gastric cancer.Here,we demonstrated that the combination of AG-041R(a CCK-2 receptor antagonist) plus NS-398(a selective COX-2 inhibitor) treatment had synergistic effects on proliferation inhibition,apoptosis induction,down-regulation of Bcl-2 and up-regulation of Bax expression in MKN-45 cells.These results indicate that simultaneous targeting of CCK-2 receptor and COX-2 may inhibit gastric cancer development more effectively than targeting either molecule alone.(C)2008 Elsevier Ireland Ltd.All rights reserved.
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.
文摘头颈部鳞状细胞癌(head and neck squamous cell carcinoma,HNSCC)是头颈部肿瘤最为常见的一种类型,其治疗效果及患者的预后并不理想,随着抗表皮生长因子受体(epidermal growth factor receptor,EGFR)单抗和免疫检查点抑制剂(immune checkpoint inhibitors,ICIs)的广泛应用,HNSCC患者的生存期虽有所延长但仍存在较大的改善空间。近年来多项研究提示,抗EGFR单抗联合ICIs治疗可带来良好的效果及安全性,已获得美国国立综合癌症网络(National Comprehensive Cancer Network,NCCN)和中国临床肿瘤学会(Chinese Society of Clinical Oncology,CSCO)等发布的权威性指南推荐。然而,抗EGFR单抗联合ICIs治疗方案的应用仍处于早期探索阶段,如何在临床中规范使用仍存在诸多待解答的问题,包括其协同作用机制、在不同类型患者中的治疗价值及安全性等。CSCO头颈肿瘤专家委员会组织专家基于循证医学证据及临床实践探索,经过多轮讨论,最终形成《抗EGFR单抗联合免疫检查点抑制剂治疗头颈部鳞状细胞癌专家共识(2025年版)》,对抗EGFR单抗与ICIs联合治疗的作用机制、分层治疗、在特殊人群中的应用及安全性等方面提出指导建议。本共识已在国际实践指南注册与透明化平台(Practice guideline REgistration for transPAREncy,PREPARE)上注册,注册号为PREPARE-2025CN666。期望本共识能够为临床医师提供更为明确和实用的指导,进一步推动该联合方案在临床实践中的合理应用,为HNSCC患者提供更多的治疗选择。
文摘目的探讨基于动态对比增强磁共振成像(dynamic contrast-enhanced magnetic resonance imaging,DCE-MRI)和扩散加权成像(diffusion-weighted imaging,DWI)的瘤内及瘤周影像组学预测乳腺癌人表皮生长因子受体2(human epidermal growth factor receptor-2,HER-2)状态的价值。材料与方法回顾性分析246例经术后病理证实的乳腺癌患者的临床及影像学资料,按7∶3比例随机分为训练组和验证组。采用ITK-SNAP软件手动勾画病灶瘤内感兴趣区,使用PHIgo-AK软件进行瘤周的扩展并提取瘤内及瘤周的影像组学特征。采用最小冗余最大相关(max-relevance and min-redundancy,mRMR)算法等选择DCE-MRI、DWI瘤内及瘤周的最优特征数。分别建立单序列及联合序列的影像组学模型,采用受试者工作特征(receiveroperating characteristic,ROC)曲线对各模型的预测效能进行分析,并计算曲线下面积(area under the curve,AUC),选出预测效能最高的模型,在训练组中从临床及常规影像学特征中通过单因素logistic回归筛选出预测HER-2状态的独立危险因素,结合预测效能最高模型的影像组学标签评分(radiomic score,rad-score)建立融合模型,并以诺模图(nomogram)展示,采用AUC值,决策曲线分析(decision curve analysis,DCA)评估模型的效能及临床价值。结果基于DCE-MRI和DWI瘤内及瘤周的影像组学联合模型预测HER-2状态的AUC值在训练组和验证组分别为0.953和0.948,效能最高。肿瘤最大径是区分乳腺癌HER-2状态的独立危险因素,最终结合rad-score和肿瘤最大径建立的融合模型对乳腺癌HER-2状态有良好的预测效能,在训练组的AUC值为0.961,验证组为0.958。结论基于DCE-MRI和DWI瘤内及瘤周的影像组学方法对乳腺癌HER-2状态的预测具有良好的价值。
