Annexin II represents metastatic potential in clear-cell renal cell carcinoma.

Annexin II represents metastatic potential in clear-cell renal cell carcinoma.
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DOI:
10.1038/sj.bjc.6605128
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发表时间:
2009-07-21
影响因子:
8.8
通讯作者:
--
中科院分区:
医学1区
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背景:膜联蛋白 II (ANX2) 是一种多功能蛋白,参与细胞增殖和膜生理学,并与癌症进展相关。本研究的目的是评估透明细胞 (cc) 肾细胞癌 (RCC) 中 ANX2 的表达。方法:通过实时逆转录酶 (RT)-PCR 和蛋白质印迹分析检查 18 个原发性 ccRCC 中的 ANX2 表达。此外,使用 154 个原发性 ccRCC 和 24 个转移瘤的石蜡切片进行了免疫组织化学研究。分析ANX2表达与临床病理因素及预后的关系。结果:18 个原发性 ccRCC 中的 14 个中 ANX2 的 mRNA 和蛋白质水平均上调。免疫组织化学分析显示,ANX2 在 154 个原发性 ccRCC 中的 73 个(47.4%)和 24 个转移性肿瘤中的 21 个(87.5%)中呈阳性。原发肿瘤中的 ANX2 表达与较高阶段、较高核级别显着相关。在无转移的患者中,ANX2阳性肿瘤患者的5年无转移率显着低于ANX2阴性肿瘤患者(63.0% vs 90.1%;P<0.0001)。多变量分析表明 ANX2 表达是转移的独立预测因子。结论:我们的研究结果表明,ANX2 表达可能是 ccRCC 转移潜力的新预测因子。
BACKGROUND: Annexin II (ANX2) is a multi-functional protein involved in cell proliferation and membrane physiology and is related to cancer progression. The purpose of this study was to assess ANX2 expression in clear-cell (cc) renal cell carcinoma (RCC). METHODS: The ANX2 expression in 18 primary ccRCCs was examined by real-time reverse transcriptase (RT)–PCR and western blot analyses. Furthermore, immunohistochemical study was performed using paraffin section of 154 primary ccRCCs and 24 metastases. The association between ANX2 expression and the clinicopathological factors and prognosis was analysed. RESULTS: The ANX2 was upregulated at both mRNA and protein levels in 14 of 18 primary ccRCCs. Immunohistochemical analysis showed that ANX2 was positive in 73 (47.4%) of 154 primary ccRCC and in 21 (87.5%) of 24 metastatic tumours. The ANX2 expression in the primary tumours showed significant associations with a higher stage, a higher nuclear grade. In patients without metastasis, the 5-year metastasis-free rate in patients with ANX2-positive tumour was significantly lower than that in those with ANX2-negative tumour (63.0% vs 90.1%; P<0.0001). Multivariate analysis showed that ANX2 expression is an independent predictor for metastasis. CONCLUSION: Our findings suggest that ANX2 expression might be a novel predictor of the metastatic potential of ccRCC.
在多药抗性小细胞肺癌细胞系中,膜联蛋白II(Lipocortin II,p36)的表达升高。
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