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机构地区:[1]武汉大学人民医院病理科消化系统疾病湖北省重点实验室,430060 [2]武汉大学人民医院保健科,430060 [3]武汉大学人民医院消化内科,430060
出 处:《中华实验外科杂志》2016年第9期2158-2162,共5页Chinese Journal of Experimental Surgery
基 金:湖北省自然科学基金(2013CFB255)
摘 要:目的 观察赫赛汀(Herceptin)对过表达人类表皮生长因子受体-2(Her-2/neu)食管鳞癌细胞EC109增殖及凋亡的影响,并探讨其作用机制.方法 噻唑蓝(MTT)染色法、膜联蛋白V(Annexin V)-异硫氰酸荧光素(FITC)/碘化丙锭(PI)流式细胞仪(FC)及Hoechst33258检测Herceptin对肿瘤细胞增殖和凋亡的影响.Western blot检测Herceptin对Her-2/neu介导的两条重要信号通路Ras/丝裂原活化蛋白激酶(MAPK)和磷酸肌醇3激酶(PI3K)/蛋白激酶B(Akt)的影响.结果 采用不同浓度的Herceptin作用细胞72 h,MTT结果显示抑制率分别为(11.40±0.80)%、(14.80±0.81)%、(36.84±1.75)%、(48.20±0.47)%、(50.37±0.91)%(P<0.01);流式细胞仪显示早期凋亡率分别为(13.77±1.48)%、(19.53±0.95)%、(31.77±2.34)%、(44.83±3.11)%、(59.67±2.55)%(P<0.05);Western blot检测结果显示Herceptin能下调Her-2/neu、Ras和磷酸化Akt(p-Akt)的表达水平,上调p27表达水平.结论 Herceptin可抑制食管鳞癌EC109细胞的增殖,诱导其凋亡.Herceptin可能通过抑制Her-2/neu介导的Ras/MAPK及PI3K/Akt信号通路抑制食管鳞癌细胞的增殖。Objective To study the effects and mechanism of herceptin on the proliferation and apoptosis of esophageal squamous carcinoma cells (EC109).Methods Methyl thiazol tetrazolium (MTT)assay,flow cytomtry (FCM) and Hoechst33258 methods were used to measure the effects of herceptin on the proliferation and apoptosis of EC109 cells.Western blotting was used to measure the effects of herceptin on two important signaling pathways mediated by human epidermal growth factor receptor 2 (Her-2/neu):Ras/mitogen-activated protein kinase (MAPK) and phosphatidylinositol 3 kinase (PI3K)/protein kinase B (Akt).Results Different concentrations of herceptin were used in EC109 cells for 72 h.MTT assay showed the inhibition rate was (11.40±0.80)%,(14.80 ±0.81)%,(36.84 ±1.75)%,(48.20 ± 0.47) %,and (50.37 ± 0.91) % respectively (P 〈 0.01);FCM showed the early apoptosis rate was (13.77 ±1.48)%,(19.53 ±0.95)%,(31.77 ±2.34)%,(44.83 ±3.11)%,and (59.67 ± 2.55)% respectively (P 〈 0.05).Western blotting showed that herceptin could down-regulate the expression of Her-2/neu,Ras and phosphorylated Akt (p-Akt),and up-regulate the expression of p27.Conclusion Herceptin can significantly inhibit the proliferation of EC109 cells probably by suppressing Her-2/neu mediated Ras/MAPK and P13K/Akt signaling pathways,and induce apoptosis.
关 键 词:食管鳞状细胞癌 人类表皮生长因子受体-2/neu 信号通路 赫赛汀
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