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核 Survivin 表达与 Aurora-B 共同与头颈部癌症的恶性行为相关。

Nuclear Survivin expression is correlated with malignant behaviors of head and neck cancer together with Aurora-B.

机构信息

Department of Oral and Maxillofacial Pathobiology, Division of Frontier Medical Science, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.

出版信息

Oral Oncol. 2010 Apr;46(4):263-70. doi: 10.1016/j.oraloncology.2010.01.004. Epub 2010 Feb 6.

Abstract

Survivin belongs to the inhibitors of apoptosis (IAP) gene family and inhibits apoptosis. Besides its role as IAP, Survivin recently appears to function as a subunit of the chromosomal passenger complex (CPC) for regulating cell division with other CPC proteins including Aurora-B and INCENP. Nuclear Survivin is suspected to control cell division, whereas cytoplasmic Survivin is considered cytoprotective. Although there are several studies on Survivin expression and its function as inhibition of apoptosis, there is no study on Survivin function as a CPC and its correlation with other CPC proteins in head and neck squamous cell carcinoma (HNSCC). Here, therefore, we examined nuclear Survivin expression and its functional correlation with Aurora-B in HNSCC. High expression of Survivin was well correlated with Aurora-B expression in nuclear fraction of HNSCC cell lines and tissues. Moreover, nuclear Survivin expression was significantly correlated with Ki-67 and Aurora-B expression by immunohistochemistry. Notably, HNSCC cases with nuclear Survivin and Aurora-B expression exhibited marked malignant behaviors. Interestingly, both Survivin and Aurora-B knockdown inhibited cell growth and tumorsphere formation. Overall suggest that nuclear Survivin may be involved in tumor progression together with Aurora-B, and that Survivin and Aurora-B can be useful diagnostic markers and therapeutic targets.

摘要

Survivin 属于凋亡抑制因子(IAP)基因家族,能抑制细胞凋亡。除了作为 IAP 的作用外,Survivin 最近似乎还作为染色体乘客复合物(CPC)的亚基发挥作用,与 Aurora-B 和 INCENP 等其他 CPC 蛋白一起调节细胞分裂。核 Survivin 被怀疑控制细胞分裂,而细胞质 Survivin 被认为具有细胞保护作用。尽管有几项关于 Survivin 表达及其作为凋亡抑制作用的功能的研究,但尚未有研究探讨 Survivin 作为 CPC 的功能及其与头颈鳞状细胞癌(HNSCC)中其他 CPC 蛋白的相关性。因此,本研究旨在检测 Survivin 在 HNSCC 中的核表达及其与 Aurora-B 的功能相关性。在 HNSCC 细胞系和组织的核部分中,Survivin 的高表达与 Aurora-B 的表达密切相关。此外,免疫组织化学染色显示,核 Survivin 表达与 Ki-67 和 Aurora-B 表达显著相关。值得注意的是,具有核 Survivin 和 Aurora-B 表达的 HNSCC 病例表现出明显的恶性行为。有趣的是,Survivin 和 Aurora-B 的敲低均抑制了细胞生长和肿瘤球形成。综上所述,核 Survivin 可能与 Aurora-B 一起参与肿瘤进展,Survivin 和 Aurora-B 可作为有用的诊断标志物和治疗靶点。

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