BACKGROUND: Integrin alphavbeta6 is up-regulated in a variety of human carcinomas and plays a crucial role in tumor invasion and metastasis. However, the function of alphavbeta6 in pancreatic carcinoma and its potential role in gemcitabine resistance remain unknown. MATERIALS AND METHODS: Small interfering RNA (siRNA) targeting alphavbeta6 was constructed and transfected into PANC-1 cells. Effects of alphavbeta6 knockdown on cell proliferation, invasion, cell cycle progression, apoptosis and chemosensitivity to gemcitabine were investigated. RESULTS: Expression of alphavbeta6 in PANC-1 cells was markedly suppressed by siRNA. Silencing of alphavbeta6 expression significantly inhibited cell proliferation and invasiveness, resulted in cell cycle arrest, and induced cell apoptosis. More importantly, alphavbeta6 knockdown enhanced chemosensitivity to gemcitabine and increased gemcitabine-induced caspase-mediated apoptosis. CONCLUSION: These findings suggest a novel mechanism by which alphavbeta6 contributes to pancreatic carcinoma progression. The combination of alphavbeta6 silencing and gemcitabine treatment may provide an effective therapeutic strategy for highly resistant pancreatic carcinoma.
BACKGROUND: Integrin alphavbeta6 is up-regulated in a variety of humancarcinomas and plays a crucial role in tumor invasion and metastasis. However, the function of alphavbeta6 in pancreatic carcinoma and its potential role in gemcitabine resistance remain unknown. MATERIALS AND METHODS: Small interfering RNA (siRNA) targeting alphavbeta6 was constructed and transfected into PANC-1 cells. Effects of alphavbeta6 knockdown on cell proliferation, invasion, cell cycle progression, apoptosis and chemosensitivity to gemcitabine were investigated. RESULTS: Expression of alphavbeta6 in PANC-1 cells was markedly suppressed by siRNA. Silencing of alphavbeta6 expression significantly inhibited cell proliferation and invasiveness, resulted in cell cycle arrest, and induced cell apoptosis. More importantly, alphavbeta6 knockdown enhanced chemosensitivity to gemcitabine and increased gemcitabine-induced caspase-mediated apoptosis. CONCLUSION: These findings suggest a novel mechanism by which alphavbeta6 contributes to pancreatic carcinoma progression. The combination of alphavbeta6 silencing and gemcitabine treatment may provide an effective therapeutic strategy for highly resistant pancreatic carcinoma.
Authors: Liu Enyu; Niu Zhengchuan; Wang Jiayong; Liang Benjia; Sun Qi; Qin Ruixi; Peng Cheng; Abdul Qadir Khan; Song Wei; Niu Jun Journal: Tumour Biol Date: 2015-05-17
Authors: Liu Song; Zhang Fan; Niu Jun; Liang Benjia; Li Zequn; Wang Xilong; Jia Zhongming; Han Yong; Wang Xiaohong; Cheng Kai; Yang Zhenlin Journal: Oncotarget Date: 2016-12-20