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Title: [Expression and significance of Nek2B and β-catenin in triple negative breast cancer].
Author: Yan WP, Shen HH, Ma WX, Wang ZY, Shang LF, Shen NN, Qi GY, Wei R, Zhang XQ, Wang C.
Journal: Zhonghua Bing Li Xue Za Zhi; 2020 May 08; 49(5):424-429. PubMed ID: 32392924.
Abstract:
Objective: To investigate the expression and significance of Nek2B and β-catenin expression in triple negative breast cancer (TNBC) at molecule levels. Methods: By using the methods of bioinformatics [GEO2R online tool, gene ontology (GO) function analysis, KEGG biological pathway enrichment analysis], the differentially expressed genes were screened from TNBC microarray data.Expression levels of Nek2B and β-catenin TNBC cell lines were detected by Western blot and qRT-PCR.From January 1, 2007 to December 31, 2012, eighty cases of TNBC were collected from the Second Hospital of Shanxi Medical University. The expression of Nek2B in TNBC tumor tissue was detected by immunohistochemistry and tissue microarray, and the relationship between Nek2B and clinical pathological characteristics of TNBC was analyzed. Results: Through bioinformatics analysis of the cDNA chip sets of 2 TNBC tumors(GSE38959,GSE27447), 998 differentially expressed genes were obtained in the initial screening, and 13 differentially expressed genes were revealed after intersection. The results of biological pathway analysis showed that the common differential expression genes were closely related to Wnt/β-catenin pathway, among which Nek2 expression showed the greatest difference and was associated with poor prognosis. Expression intensity of Nek2B and repeated β-catenin in the same TNBC cell line was consistent.The results of immunohistochemistry showed that the high expression of Nek2B was related to the high histological stage (G3;84.3% vs.37.9%, P<0.001), lymph node metastasis group (76.7% vs.54.1%, P=0.032), high Ki-67 positive index group (78.6% vs.52.6%, P=0.007) and β-catenin positive expression group (72.5% vs.27.3%, P=0.018). Conclusions: The high level of Nek2B expression is related to a poor prognosis in TNBC patients. In TNBC tissues and cells, the expression of Nek2B is correlated with β-catenin, suggesting that Nek2B may affect the occurrence and development of TNBC by regulating the Wnt/β-catenin patients signaling pathway. 目的： 在分子水平探讨Nek2B与β-catenin在三阴性乳腺癌（triple negative breast cancer，TNBC）中的表达及意义。 方法： 利用生物信息学分析的方法[GEO2R在线工具、基因本体（GO）功能分析、KEGG生物途径富集分析]筛选TNBC基因芯片集数据中的差异表达基因；运用Western blot及即时定量逆转录-聚合酶链反应（qRT-PCR）检测Nek2B、β-catenin在TNBC细胞系中的表达水平；收集山西医科大学第二医院2007年1月1日至2012年12月31日的80例TNBC患者资料，采用免疫组织化学法检测Nek2B在TNBC肿瘤组织芯片的表达，分析其与TNBC临床病理学特征之间的关系。 结果： 通过生信分析2个TNBC肿瘤的cDNA芯片集（GSE38959和GSE27447），初筛共得到998个差异表达基因（DEG），其中13个共同DEG，生物途径分析结果显示共同DEG与Wnt/β-catenin通路有密切联系，其中Nek2的表达差异最大，且与患者不良预后相关；Western blot和qRT-PCR结果提示在同一种TNBC细胞系中，Nek2B与β-catenin的表达强度一致；免疫组织化学结果显示，在TNBC肿瘤组织中，Nek2B的高表达与高组织学分级（G3；84.3%比37.9%，P<0.001），淋巴结转移（76.7%比54.1%，P=0.032）和高Ki-67阳性指数（78.6%比52.6%，P=0.007）以及β-catenin阳性表达（72.5%比27.3%，P=0.018）相关。 结论： Nek2B高表达与TNBC患者的不良预后有关，在TNBC组织与细胞中，Nek2B的表达与β-catenin呈正相关性，提示Nek2B可能通过调控Wnt/β-catenin信号通路影响TNBC的发生与发展。.

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