胰腺癌伴糖尿病的蛋白质组学分析

目的 应用蛋白质组学方法 分析胰腺癌伴或不伴糖尿病的差异蛋白质,试图阐明糖尿病在胰腺癌发生、发展过程中的分子机制.方法 研究标本分为四组:胰腺癌组及其癌旁组织组,伴有糖尿病的胰腺癌组及其癌旁组织组,每组5份.利用二维电泳和基质辅助激光解析飞行时间质谱(MALDI-TOF/TOF MS/MS)技术研究四组间的蛋白表达差异.Western印迹法对巨噬细胞加帽蛋白(CapG)在癌组织中的表达进行验证.结果 在胰腺癌伴糖尿病组,有7个蛋白表达明显上调(P＜0.05),而在其他三组间的表达则差异无统计学意义(P＞0.05),这些蛋白参与了细胞运动、能量代谢、氧化应激等,其中CapG蛋白可能参与了这类患者的癌细胞浸润及转移过程.结论 该研究初步支持糖尿病参与胰腺癌进展的假说.

Proteomic analysis of pancreatic cancer associated with diabetes mellitus

Objective To identify the different proteins of pancreatic cancer with and without diabetes mellitus (DM) ,so as to provide some clues for understanding the molecular mechanisms of DM in the development .of pancreatic cancer. Methods Samples were divided into pancreatic cancer with or without DM and their normal adjacent tissue with 5 each. The protein expression profiles were analyzed using 2-DE in combination with MALDI-TOF/TOF MS/MS. Western blot was used to verify the expression of a candidate protein CapG. Results Seven proteins were obviously up-regulated in pancreatic cancer with DM(P＜0.05). These proteins were involved in cell motility, metabolism, oxidative stress, etc. Additionally, CapG implicated a functional contribution of cancer invasion and metastasis. Conclusion The results also provide evidence to support the hypothesis that DM plays an important role in the development of pancreatic cancer.