上皮性卵巢癌中 PARP-1的表达及其与 EMT 的关系

摘要

AIM:To investigate the expression of poly (ADP-ribose) polymerase-1 (PARP-1) in the epithelial ovarian cancer ( EOC) and its relationship with epithelial-mesenchymal transition ( EMT) .METHODS:The expression of PARP-1, E-cadherin, vimentin and Snail was detected in the EOC and benign ovarian tumor tissues by immunohistochemi -cal method and real-time PCR.The expression of PARP-1, E-cadherin, vimentin and Snail proteins in the SKOV3 cells treated with efficient PARP-1 inhibitor PJ34 was determined by Western blotting .RESULTS:The positive expression rates of PARP-1, vimentin and Snail were significantly higher in the EOC than that in the benign ovarian tumor tissues , whereas the positive expression rate of E-cadherin was the opposite (P<0.05).The expression of PARP-1, E-cadherin, vimentin and Snail in the EOC was associated with the histological grade , clinical stage and lymphatic metastasis (P<0.05), but no relationship with age and pathological types was observed .The expression of E-cadherin in the EOC was negatively co-related to that of PARP-1.In contrast, the expression of vimentin and Snail in the EOC was positively co-related to that of PARP-1.The relative mRNA expression of PARP-1, vimentin and Snail in the EOC was significantly higher than that in the benign ovarian tumor tissues ( P<0.05) , while the mRNA expression of E-cadherin in the EOC was remarkably lower than that in the benign ovarian tumor tissues (P<0.05).The protein expression of PARP-1, vimentin and Snail in the SKOV3 cells was significantly decreased (P<0.05), while E-cadherin protein was increased after treated with PJ 34(P<0.05). CONCLUSION:PARP-1 may contribute to the onset of EMT in the EOC by regulating the expression of E -cadherin, vim-entin and Snail.The role of PARP-1, which is relevant to EMT, might be important in the development of ovarian cancer .%目的：探讨上皮性卵巢癌（epithelial ovarian cancer，EOC）中聚腺苷二磷酸核糖聚合酶-1[poly （ADP-ribose） polymerase-1，PARP-1]的表达及其与上皮-间质转化（epithelial-mesenchymal transition，EMT）的关系。方法：免疫组化、实时荧光定量PCR法检测EOC和良性卵巢肿瘤组织中PARP-1、E-钙黏蛋白（ E-cadherin ）、波形蛋白（vimentin）和转录调控因子Snail的表达；Western blotting 法检测高效PARP-1抑制剂PJ34处理SKOV3细胞后PARP-1、E-cadherin、vimentin和Snail蛋白的表达。结果：PARP-1、vimentin和Snail在EOC中阳性表达率高于良性卵巢肿瘤组织，而E-cadherin则相反，差异均有统计学显著性（ P＜0.05）。 PARP-1、E-cadherin、vimentin和Snail与EOC的病理分级、临床分期和有无淋巴结转移有关（P＜0.05），与年龄和病理类型无关。 E-cadherin表达与PARP-1表达呈负相关（ P＜0.05）， vimentin、Snail 表达与PARP-1表达呈正相关（ P＜0.05）。 EOC中PARP-1、vimentin 和Snail mRNA的相对表达量高于良性卵巢肿瘤组织，E-cadherin mRNA的相对表达量低于良性卵巢肿瘤组织，差异均具有统计学显著性（P＜0.05）。 PJ34处理SKOV3细胞后，PARP-1、vimentin和Snail 的蛋白水平明显下降，E-cad-herin的蛋白水平显著提高，差异有统计学显著性（ P＜0.05）。结论：PARP-1通过调控E-cadherin、vimentin和Snail的表达促进EOC上皮间质转化。 PARP-1及其参与的上皮-间质转化在EOC进展中发挥重要作用。