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首页> 外文期刊>Cell biology international. >Elevated level of gas3 gene expression is correlated with G0 growth arrest in human fibroblasts.
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Elevated level of gas3 gene expression is correlated with G0 growth arrest in human fibroblasts.

机译:在人成纤维细胞中,gas3基因表达水平升高与G0生长停滞有关。

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The gas3/PMP22 gene product is a dual function protein, involved in both peripheral nerve myelination and cell proliferation. gas 3/PMP22 is highly expressed in myelinating Schwann cells and is required for normal PNS development. In addition, a more general function for gas3 is suggested by its expression in non-neural tissues and upregulation by growth arrest in cultured rodent fibroblasts. In the present work, the expression of the gas3 gene has been studied in human fibroblasts. We have confirmed that gas3 mRNA is upregulated when cells are serum starved or grown to high cell density (G0 arrest). When quiescent cells were stimulated by serum or platelet-derived growth factor-BB (PDGF-BB), gas3 mRNA was down regulated. In contrast, we found that the expression of gas3 mRNA was neither upregulated in senescent cells nor in cells arrested in G1 using Lovastatin. Thus, high expression of gas3 is not related to growth inhibition in general, but more probably to the G0 growth arrest state. Furthermore, we found that in two malignant fibrous histiocytoma cell lines, gas3 expression was lower than in normal fibroblasts, suggesting an altered regulation of the gas3 gene in transformed cells. Copyright 1999 Academic Press.
机译:gas3 / PMP22基因产物是双重功能蛋白,参与周围神经髓鞘形成和细胞增殖。 gas 3 / PMP22在有髓雪旺细胞中高度表达,是正常PNS发育所必需的。此外,gas3在非神经组织中的表达以及培养的啮齿动物成纤维细胞中生长停滞的上调提示了gas3的更一般功能。在目前的工作中,已经在人成纤维细胞中研究了gas3基因的表达。我们已经证实,当细胞血清饥饿或生长至高细胞密度(G0阻滞)时,gas3 mRNA会上调。当血清或血小板源性生长因子-BB(PDGF-BB)刺激静止细胞时,gas3 mRNA被下调。相反,我们发现使用洛伐他汀在衰老细胞或在G1阻滞的细胞中,gas3 mRNA的表达均未上调。因此,gas3的高表达通常与生长抑制无关,而更可能与G0生长停滞状态有关。此外,我们发现在两种恶性纤维组织细胞瘤细胞系中,gas3表达低于正常成纤维细胞,表明转化细胞中gas3基因的调控发生了改变。版权所有1999,学术出版社。

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