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Paradoxical expression of cell cycle inhibitor p27 in endometrioid adenocarcinoma of the uterine corpus – correlation with proliferation and clinicopathological parameters

机译:细胞周期抑制剂p27在子宫内膜样子宫腺癌中的反常表达-与增殖和临床病理参数的关系

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摘要

p27 is regarded as a cyclin-dependent kinase inhibitor of the G1-to-S cell cycle progression by suppressing the kinase activity of cyclin/cyclin-dependent kinase complex. This study aimed to investigate p27 expression in the normal endometrium and endometrioid adenocarcinoma of the uterine corpus and the correlation of its expression with cell proliferation and clinicopathological parameters. Tissue samples of 127 endometrioid adenocarcinomas and 15 normal endometria were used in the study. Immunohistochemical staining for detecting p27 and Ki-67 was performed by the labelled streptavidin-biotin method on formalin-fixed and paraffin-embedded tissue samples. The expression was given as the labelling index, which indicates the percentage of positive nuclei. p27 staining was observed in the nuclei of the glandular cells in the functional layer of the secretory phase endometrium, whereas it was negative in those of the proliferative phase. In endometrioid adenocarcinomas, the labelling index of p27 expression paradoxically increased more significantly in the higher histological grades and was correlated with that of Ki-67. The high level of p27 expression was associated with clinicopathological parameters such as FIGO stage, lymph node metastasis, lymphovascular space involvement and myometrial invasion. High p27 expression was linked to higher grades of endometrioid adenocarcinoma, cell proliferation and some clinical prognostic factors. These results indicate that p27 might be an indicator of poor prognosis.
机译:通过抑制细胞周期蛋白/细胞周期蛋白依赖性激酶复合物的激酶活性,p27被认为是G1-to-S细胞周期进程中细胞周期蛋白依赖性激酶抑制剂。本研究旨在研究p27在子宫内膜正常子宫内膜和子宫内膜样腺癌中的表达及其与细胞增殖和临床病理参数的关系。该研究使用了127例子宫内膜样腺癌和15例正常子宫内膜的组织样本。通过标记的链霉亲和素-生物素方法对福尔马林固定和石蜡包埋的组织样品进行了免疫组织化学染色,以检测p27和Ki-67。该表达作为标记指数给出,其指示阳性核的百分比。在分泌期子宫内膜功能层的腺细胞核中观察到p27染色,而在增殖期子宫内膜则为阴性。在子宫内膜样腺癌中,在较高的组织学等级中,p27表达的标记指数自相矛盾地增加得更多,并且与Ki-67相关。 p27的高表达与临床病理参数有关,例如FIGO分期,淋巴结转移,淋巴管空间受累和肌层浸润。 p27的高表达与子宫内膜样腺癌的高级别,细胞增殖和某些临床预后因素有关。这些结果表明p27可能是预后不良的指标。

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