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首页> 外文期刊>Journal of Cellular Physiology >BRD7, a novel bromodomain gene, inhibits G1-S progression by transcriptionally regulating some important molecules involved in ras/MEK/ERK and Rb/E2F pathways.
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BRD7, a novel bromodomain gene, inhibits G1-S progression by transcriptionally regulating some important molecules involved in ras/MEK/ERK and Rb/E2F pathways.

机译:BRD7,小说bromodomain基因,抑制G1-S通过转录调节一些发展重要的分子参与ras / MEK / ERK和Rb - E2F pathways。

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摘要

Bromodomain is a 110 amino acid domain. It is evolutionally conserved and is found in proteins strongly implicated in signal-dependent transcriptional regulation. BRD7 is a novel bromodomain gene and it is downexpressed in nasopharyngeal carcinoma (NPC) biopsies and cell lines; its function is poorly understood. In the present study, tet-on inducible expression system was used to investigate the role of BRD7 in cell growth and cell cycle progression. We found that ectopic expression of BRD7 in NPC cells inhibited cell growth and cell cycle progression from G1 to S. We further performed cell cycle cDNA array to screen potential transcriptional targets of BRD7 in cell cycle. Thirteen important signaling molecules, mainly implicated in ras/MEK/ERK and Rb/E2F pathways, were differentially expressed by induction of BRD7. Moreover, we observed that BRD7 could regulate the promoter activity of E2F3, one of its targets. Taken together, the present study indicated that BRD7 inhibited G1-S progression by transcriptionally regulating some important molecules involved in ras/MEK/ERK and Rb/E2F pathways and suggested that BRD7 may present a promising candidate of NPC trade mark associated tumor suppressor gene.
机译:Bromodomain是110氨基酸领域。散播他们保守中发现的蛋白质强烈与相互依赖转录调控。bromodomain基因和downexpressed在鼻咽癌(NPC)切片和细胞行;目前的研究中,tet-on诱导表达系统被用来调查BRD7的角色在细胞生长和细胞周期进程。异位表达BRD7的NPC细胞抑制从G1细胞生长和细胞周期进程我们进一步进行细胞周期cDNA数组筛选潜在转录BRD7的目标在细胞周期。分子,主要涉及在ras / MEK / ERK和Rb / E2F通路,差异表达BRD7的感应。BRD7可以调节的推广活动E2F3,它的一个目标。本研究表明,BRD7抑制G1-S通过转录调节一些发展重要的分子参与ras / MEK / ERK和Rb / E2F途径和建议BRD7可能目前人大商标的一个有前途的候选人相关的肿瘤抑制基因。

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