SSeCKS/Gravin/AKAP12 attenuates expression of proliferative and angiogenic genes during suppression of v-Src-induced oncogenesis.

SSeCKS/Gravin/AKAP12 attenuates expression of proliferative and angiogenic genes during suppression of v-Src-induced oncogenesis.
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DOI:
10.1186/1471-2407-6-105
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发表时间:
2006-04-25
期刊:
影响因子:
3.8
通讯作者:
Gelman, Irwin H.
Gelman, Irwin H.
中科院分区:
医学2区
文献类型:
--
作者:
Liu, Yongzhong;Gao, Lingqiu;Gelman, Irwin H.

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SSeCKS 是一种主要的蛋白激酶 C 底物,具有激酶支架和转移抑制活性,其表达在 Src 和 Ras 转化的成纤维细胞和上皮细胞以及人类前列腺癌、乳腺癌和胃癌中严重下调。我们之前使用具有四环素调节的 SSeCKS 表达​​加上温度敏感的 v-Src 等位基因的 NIH3T3 细胞来证明 SSeCKS 重新表达抑制 v-Src 诱导的致癌生长参数,而不减弱体内 Src 激酶活性。我们使用 cDNA 微阵列和半定量 RT-PCR 分析来识别与以下相关的基因表达变化:i) 在没有 v-Src 活性的情况下 SSeCKS 表达​​,ii) 仅激活 v-Src 活性,以及​​ iii) 在存在活性 v-Src 的情况下 SSeCKS 重新表达。 SSeCKS 重新表达导致关键 Src 诱导的增殖和促血管生成基因表达减弱,包括 Afp、Hif-1α、Cdc20a 和 Pdgfr-β,相反,SSeCKS 诱导多种细胞周期调节基因,如 Ptpn11、Gadd45a、Ptplad1、Cdkn2d (p19) 和 Rbbp7。我们的数据进一步证明 SSeCKS 可以通过调节 Src 激酶活性下游的基因表达来抑制 Src 诱导的肿瘤发生。
SSeCKS is a major protein kinase C substrate with kinase scaffolding and metastasis-suppressor activity whose expression is severely downregulated in Src- and Ras-transformed fibroblast and epithelial cells and in human prostate, breast, and gastric cancers. We previously used NIH3T3 cells with tetracycline-regulated SSeCKS expression plus a temperature-sensitive v-Src allele to show that SSeCKS re-expression inhibited parameters of v-Src-induced oncogenic growth without attenuating in vivo Src kinase activity. We use cDNA microarrays and semi-quantitative RT-PCR analysis to identify changes in gene expression correlating with i) SSeCKS expression in the absence of v-Src activity, ii) activation of v-Src activity alone, and iii) SSeCKS re-expression in the presence of active v-Src. SSeCKS re-expression resulted in the attenuation of critical Src-induced proliferative and pro-angiogenic gene expression including Afp, Hif-1α, Cdc20a and Pdgfr-β, and conversely, SSeCKS induced several cell cycle regulatory genes such as Ptpn11, Gadd45a, Ptplad1, Cdkn2d (p19), and Rbbp7. Our data provide further evidence that SSeCKS can suppress Src-induced oncogenesis by modulating gene expression downstream of Src kinase activity.
DOI: 10.1074/jbc.m201907200
发表时间: 2002-06-21
影响因子: 4.8
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影响因子: --
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