结直肠癌组织CypB表达及其对癌细胞迁移和侵袭能力的影响

目的观察伴或不伴淋巴结转移的结直肠癌组织中亲环素B（CypB）的表达变化，研究CypB质粒敲除对结直肠癌细胞迁移和侵袭能力的影响。方法采用免疫组织化学法检测结直肠癌组织芯片中59例结直肠癌组织CypB表达，其中31例无淋巴结转移，28例伴淋巴结转移。构建CypB的RNA干扰质粒，测序鉴定后转染结直肠癌细胞系SW1116（SW1116-siCypB），设立阴性对照（SW1116-NC）；Westernblotting分析CypB敲除效果。分别采用划痕实验和细胞侵袭实验评估和检测CypB敲除对SW1116细胞迁移和侵袭能力的影响。结果伴淋巴结转移结直肠癌组织中CypB表达显著高于无淋巴结转移结直肠癌组织（P〈0．01）。与SW1116-NC比较，SW1116-siCypB的CypB表达明显减少，细胞迁移和细胞侵袭能力均显著降低，差异均有统计学意义（均P〈0．01）。结论CypB在结直肠癌淋巴结转移过程中具有重要作用，有望成为防治结直肠癌淋巴结转移的分子靶点。

Expression of CypB in colorectal cancer tissues and its effects on metastasis and invasion of cancer cells

Objective To investigate the expression of cyclophilin B (CypB) in colorectal cancer tissues with or without lymph node metastasis, and explore the effects of CypB plasmids knockdown on metastasis and invasion of cancer cells. Methods The expression of CypB in 59 colorectal cancer tissue microarray, including 31 without lymph node metastasis and 28 with lymph node metastasis, were evaluated with immunohistochemistry. Colorectal cancer cell line SW1116 was transfected with shRNA plasmids targeting CypB(SW1116-siCypB) and negative control plasmids(SW1116-NC). CypB knockdown effects were analysed with Western blotting. Wound healing assay and transwell cell invasion assay were performed to observe the effects of CypB knockdown on metastasis and invasion of SW1116 cells. Results The expression of CypB in colorectal cancer tissues with lymph node metastasis was significantly higher than that in colorectal cancer tissues without lymph node metastasis (P<0.01). Compared with SW1116-NC, the expression of CypB of SW1116-siCypB significantly reduced (P<0.01), and the performance of metastasis and invasion significantly decreased (P<0.01). Conclusion CypB plays an important role in lymph node metastasis of colorectal cancer, which makes it a potential target for the prevention and treatment of lymph node metastasis of colorectal cancer.