[摘 要] 目的：探讨颗粒酶M（GZMM）对肾透明细胞癌（ccRCC）细胞增殖、侵袭、迁移和血管生成的影响及相关分子机制。方法: 采用TCGA数据库和免疫组化分析GZMM在ccRCC组织的表达及其与临床病理特征的相关性。采用CCK-8、Transwell、划痕愈合及血管形成实验检测GZMM对ccRCC细胞增殖、侵袭、迁移和血管生成的影响，采用WB法检测GZMM对VEGF/ERK信号通路的影响。结果: TCGA数据库和免疫组化分析表明，ccRCC组织中GZMM的表达升高（P < 0.01），且与Fuhrman分级和淋巴结转移有关联（均P < 0.05）。GZMM高表达的患者预后不良（P < 0.05），且与FcerⅠ介导的MAPK激活有关联（P < 0.001）。在ccRCC细胞中，干扰GZMM降低ccRCC细胞的增殖、侵袭和迁移能力，且抑制ERK信号通路（均P < 0.05）；过表达GZMM促进ccRCC细胞的增殖、侵袭和迁移能力，且激活ERK信号通路（均P < 0.01）。在HUVEC中，分泌型GZMM促进HUVEC的增殖、迁移、小管和血管形成的能力，且激活VEGF/ERK信号通路（均P < 0.05）。此外，U0126抑制p-ERK、MMP2和MMP9的表达（均P < 0.05），但不影响VEGFA和VEGFR2的表达。结论：ccRCC组织中GZMM呈高表达，且与其Fuhrman分级和淋巴结转移有关联，GZMM通过激活VEGF/ERK信号通路促进ccRCC血管生成和侵袭。

Objective: The present study was aimed to explore the role and distinctive mechanism of SPIDR, the key regulatory protein of homologous recombination pathway, in progression of small cell lung cancer (SCLC). Methods: 60 SCLC specimens and 44 normal lung tissues were collected from the patients undergoing tumor resection and bronchoscopic puncture in Shanghai Pulmonary Hospital Affiliated to Tongji University from January 2013 to January 2015. The expression of SPIDR in clinical samples and NCIH446 (SCLC cell line) and MRC-5 (normal cell line) were assayed by Real-time PCR. The role of SPIDR in SCLC was investigated in vivo and in vitro by the expression of SPIDR were artificially modified in NCI-H446. Results: Smoking was significantly associated with the occurrence of SCLC (P<0.01). The expression of SPIDR mRNAin SCLC tissues was lower than that of normal lung tissues (P <0.01), and the SPIDR transcriptional and translational levels of NCI-H446 cells were also lower than that of MRC-5.Although there is no significant changes of cell growth rate and susceptibility to cisplatin and etoposide in the NCI-H446 cells overexpressing SPIDR. However, the volume of xenograft tumors of overexpressed SPIDR group decreased by 58.99% (P<0.01) and 61.84% (P<0.01) than that of the original NCI-H446 cells and the NCI-H446 cells transfected with vector (pMSCV) and the average tumor mass decreased by 61.70% (P<0.01) and 70.25% (P<0.01) respectively. When the fetal bovine serum content in the medium was reduced to 3%, the growth rate of NCI-H446 cells overexpressing SPIDR was 22.33% (P<0.01) and 20.24% (P<0.05) lower than that of the original NCIH446 cells and control group, the similar results were obtained from the 1% serum concentration experiment as well. Conclusion: The expression of SPIDR, the key regulatory protein in the DNAdouble strand break homologous recombination repair pathway, was significantly suppressed in SCLC tissues, which markedly accelerated the growth of NCI-H446 cells in vivo and reduced the reliance of NCIH446 cells to the serum. The detailed mechanism is worthy of further investigation.