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M2 muscarinic receptors inhibit cell proliferation in human glioblastoma cell lines.

机译:M2毒蕈碱受体抑制人胶质母细胞瘤细胞系中的细胞增殖。

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In the present work we investigated the expression of M2 muscarinic receptor subtype in two glioblastoma cell lines and its role in the control of cell proliferation.The M2 receptor transcript and protein expression was studied using RT-PCR and western blot analysis. (3)[H]-thymidine incorporation was used to evaluate cell proliferation in the presence or in the absence of M(2) agonist arecaidine.We demonstrated that M(2) receptor is expressed in both cell lines, although U251 cells show a higher expression level, compared to U87 cells. The activation of M(2) receptors by the agonist arecaidine decreases cell growth in a dose and time dependent manner. The anti-proliferative effect of arecaidine is also confirmed by the significant decrease of (3)[H]-thymidine incorporation in both cell lines. Moreover the M2 antagonist gallamine counteracts the arecaidine effects confirming M2 receptor involvement in glioma cell growth inhibition.These data suggest a role for M2 receptors in the inhibition of glioma cell proliferation and the possibility of exploiting these receptors as new promising tools for glioblastoma therapy.
机译:在目前的工作中,我们研究了M2毒蕈碱受体亚型在两种胶质母细胞瘤细胞系中的表达及其在细胞增殖控制中的作用。 (3)[H]-胸苷掺入用于评估在有或没有M(2)激动剂槟榔碱存在下的细胞增殖。我们证明了M(2)受体在两种细胞系中都有表达,尽管U251细胞显示出与U87细胞相比,表达水平更高。激动剂槟榔碱对M(2)受体的激活以剂量和时间依赖性方式降低细胞生长。两种细胞系中(3)[H]-胸腺嘧啶核苷掺入的显着减少也证实了槟榔碱的抗增殖作用。此外,M2拮抗剂没食子胺抵消了槟榔碱的作用,证实了M2受体参与了胶质瘤细胞生长的抑制作用。

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