INPP4B restrains cell proliferation and metastasis via regulation of the PI3K/AKT/SGK pathway.

INPP4B restrains cell proliferation and metastasis via regulation of the PI3K/AKT/SGK pathway.
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INPP4B 通过调节 PI3K/AKT/SGK 通路抑制细胞增殖和转移

DOI:
10.1111/jcmm.13595
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发表时间:
2018-05
影响因子:
5.3
通讯作者:
Zhao W
Zhao W
中科院分区:
医学2区
文献类型:
--
作者:
Chen Y;Sun Z;Qi M;Wang X;Zhang W;Chen C;Liu J;Zhao W

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宫颈癌仍然是全世界最常见的妇科癌症之一。磷酸肌醇3-激酶(PI 3 K)/蛋白激酶B(AKT)通路在宫颈癌中被组成性激活。肌醇多磷酸4-磷酸酶II型(INPP 4 B)是一种磷酸肌醇磷酸酶,被认为是PI 3 K/AKT通路的负调节因子。INPP 4 B在各种肿瘤中具有不同的作用,但其在宫颈癌中的作用在很大程度上是未知的。在这项研究中,我们研究了INPP 4 B在宫颈癌中的作用。INPP 4 B在HeLa、SiHa和C33 a细胞中的过表达抑制细胞增殖、CCK-8中的转移和侵袭、集落形成、软琼脂中的锚定非依赖性生长和Transwell测定。INPP 4 B降低PI 3 K/AKT/SGK 3通路中一些必需蛋白的表达,包括p-AKT、p-SGK 3、p-mTOR、磷酸化p70 S6 K和PDK 1。此外,INPP 4 B的过表达降低了裸鼠中异种移植肿瘤的生长。在超过60%的人宫颈癌样品中发现INPP 4 B蛋白表达缺失。总之,INPP 4 B通过抑制PI 3 K途径的两种下游分子AKT和SGK 3的活化来阻碍宫颈癌细胞的增殖和侵袭。INPP 4 B在宫颈癌细胞中起肿瘤抑制剂的作用。
Cervical cancer continues to be among the most frequent gynaecologic cancers worldwide. The phosphoinositide 3‐kinase (PI3K)/protein kinase B (AKT) pathway is constitutively activated in cervical cancer. Inositol polyphosphate 4‐phosphatase type II (INPP4B) is a phosphoinositide phosphatase and considered a negative regulatory factor of the PI3K/AKT pathway. INPP4B has diverse roles in various tumours, but its role in cervical cancer is largely unknown. In this study, we investigated the role of INPP4B in cervical cancer. Overexpression of INPP4B in HeLa, SiHa and C33a cells inhibited cell proliferation, metastasis and invasiveness in CCK‐8, colony formation, anchorage‐independent growth in soft agar and Transwell assay. INPP4B reduced the expression of some essential proteins in the PI3K/AKT/SGK3 pathway including p‐AKT, p‐SGK3, p‐mTOR, phospho‐p70S6K and PDK1. In addition, overexpression of INPP4B decreased xenograft tumour growth in nude mice. Loss of INPP4B protein expression was found in more than 60% of human cervical carcinoma samples. In conclusion, INPP4B impedes the proliferation and invasiveness of cervical cancer cells by inhibiting the activation of two downstream molecules of the PI3K pathway, AKT and SGK3. INPP4B acts as a tumour suppressor in cervical cancer cells.
DOI: 10.1158/2159-8290.cd-14-1347
发表时间: 2015-07
期刊: Cancer discovery
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发表时间: 1997-01-31
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期刊: Oncotarget
影响因子: --
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