Overexpression of the secretory small GTPase Rab27B in human breast cancer correlates closely with lymph node metastasis and predicts poor prognosis.
Overexpression of the secretory small GTPase Rab27B in human breast cancer correlates closely with lymph node metastasis and predicts poor prognosis.
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人乳腺癌中分泌型小 GTP 酶 Rab27B 的过度表达与淋巴结转移密切相关，并预测不良预后。
DOI：
10.1186/1479-5876-10-242
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发表时间：
2012-12-05
影响因子：
7.4
通讯作者：
Mai SJ
中科院分区：
文献类型：
--
作者：
Zhang JX;Huang XX;Cai MB;Tong ZT;Chen JW;Qian D;Liao YJ;Deng HX;Liao DZ;Huang MY;Zeng YX;Xie D;Mai SJ
The secretory small GTPase Rab27b was recently identified as an oncogene in breast cancer (BC) in vivo and in vitro studies. This research was designed to further explore the clinical and prognostic significance of Rab27B in BC patients. The mRNA/protein expression level of Rab27B was examined by performing Real-time PCR, western blot, and immunohistochemistry (IHC) assays in 12 paired BC tissues and matched adjacent noncancerous tissues (NAT). Then we carried out IHC assay in a large cohort of 221 invasive BC tissues, 22 normal breast tissues, 40 fibroadenoma (FA), 30 ductual carcinoma in situ (DCIS) and 40 metastatic lymph nodes (LNs). The receiver operating characteristic curve method was applied to obtain the optimal cutoff value for high Rab27B expression. Epithelial-mesenchymal transition (EMT) marker expression levels were detected in relation to Rab27B expression. We observed that the increased expression of Rab27B was dependent upon the magnitude of cancer progression (P < 0.001). The elevated expression of Rab27B was closely correlated with lymph node metastasis, advanced clinical stage, ascending pathology classification, and positive ER status. Furthermore, patients with high expression of Rab27B had inferior survival outcomes. Multivariate Cox regression analysis proved that Rab27B was a significantly independent risk factor for patients’ survival (P < 0.001). Furthermore, a significant positive relationship was observed between Rab27B expression and elevated mesenchymal EMT markers. Our findings suggest that overexpression of Rab27B in BC coincides with lymph node metastasis and acquisition of a poor prognostic phenotype.
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影响因子：
7.3
作者：
Bombonati, Alessandro;Sgroi, Dennis C.
通讯作者：
Sgroi, Dennis C.
影响因子：
11.4
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Bravo-Cordero, Jose J.;Marrero-Diaz, Raquel;Montoya, Maria C.
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Montoya, Maria C.
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5.2
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Lee, Kyo Won
影响因子：
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影响因子：
4.3
作者：
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