The oncogenic mutation in the pleckstrin homology domain of AKT1 in endometrial carcinomas.

The oncogenic mutation in the pleckstrin homology domain of AKT1 in endometrial carcinomas.
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DOI:
10.1038/sj.bjc.6605109
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发表时间:
2009-07-07
影响因子:
8.8
通讯作者:
--
中科院分区:
医学1区
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磷脂酰肌醇3′-激酶(PI 3 K)-AKT通路在许多人类癌症中被激活,并在细胞增殖和存活中起关键作用。AKT 1的普列克底物蛋白同源结构域中的突变(E17 K)通过定位于质膜导致组成型AKT 1活化。AKT 1(E17 K)突变已在某些肿瘤类型(乳腺癌、结直肠癌、卵巢癌和肺癌)中报道,并且感兴趣的是除了那些具有E17 K突变的肿瘤类型之外的哪些肿瘤类型。我们通过PCR和直接测序分析了89例子宫内膜癌组织标本和12个子宫内膜癌细胞系中AKT 1(E17 K)突变的存在。我们在组织样本中检测到两个AKT 1(E17 K)突变(89个中的2个),在细胞系中没有检测到突变。这两种AKT 1突变型肿瘤在PIK 3CA、PTEN和K-Ras中不具有任何突变。我们的研究结果和早期的报告表明,AKT 1突变可能与其他PI 3 K-AKT激活改变相互排斥,尽管PIK 3CA突变经常与几种类型的肿瘤中的其他改变(如HER 2,K-Ras和PTEN)共存。
The phosphatidylinositol 3′-kinase (PI3K)–AKT pathway is activated in many human cancers and plays a key role in cell proliferation and survival. A mutation (E17K) in the pleckstrin homology domain of the AKT1 results in constitutive AKT1 activation by means of localisation to the plasma membrane. The AKT1 (E17K) mutation has been reported in some tumour types (breast, colorectal, ovarian and lung cancers), and it is of interest which tumour types other than those possess the E17K mutation. We analysed the presence of the AKT1 (E17K) mutation in 89 endometrial cancer tissue specimens and in 12 endometrial cancer cell lines by PCR and direct sequencing. We detected two AKT1 (E17K) mutations in the tissue samples (2 out of 89) and no mutations in the cell lines. These two AKT1 mutant tumours do not possess any mutations in PIK3CA, PTEN and K-Ras. Our results and earlier reports suggest that AKT1 mutations might be mutually exclusive with other PI3K–AKT-activating alterations, although PIK3CA mutations frequently coexist with other alterations (such as HER2, K-Ras and PTEN) in several types of tumours.
DOI: 10.1038/sj.bjc.6604637
发表时间: 2008-10-21
影响因子: 8.8
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发表时间: 2008-10-01
影响因子: 2.8
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