基于PI3K/Akt信号通路探讨SHP2表达变化对人肝星状细胞LX-2增殖的影响
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河北省自然科学基金面上项目(H2018209366)


Effects of changes in SHP2 expression on the proliferation of human hepatic stellate cell LX-2 based on PI3K/Akt signaling pathway
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    摘要:

    目的 探讨含SH2结构域的蛋白酪氨酸磷酸酶2(SHP2)表达变化对人肝星状细胞LX-2增殖及磷脂酰肌醇-3激酶(PI3K)/蛋白激酶B (Akt)信号通路的影响。方法 以腺病毒为载体,将野生型SHP 2基因及靶向SHP2的shRNA导入LX-2细胞。实验分组:Control组(DMEM培养液代替腺病毒转染LX-2细胞)、Ad-GFP组(空病毒Ad-GFP转染LX-2细胞)、Ad-shRNA/SHP2组(携带靶向SHP2的shRNA的腺病毒Ad-shRNA/SHP2转染LX-2细胞)、Ad-SHP2组(携带野生型SHP2的腺病毒Ad-SHP2转染LX-2细胞)。实时荧光定量PCR(RT-qPCR)及Western blot检测LX-2细胞的SHP2、Akt表达;CCK-8法检测LX-2细胞增殖;Western blot检测LX-2细胞的磷酸化Akt (p-Akt)表达。结果 外源性野生型 SHP 2基因及靶向SHP2的shRNA成功导入LX-2细胞,并上调及下调LX-2细胞的SHP2表达(P<0.05);SHP2过表达显著增加了LX-2细胞的增殖及p-Akt表达(P<0.05),SHP2低表达则显著降低了LX-2细胞的增殖及p-Akt表达(P<0.05);SHP2过表达及低表达对LX-2细胞的Akt蛋白及mRNA表达无明显影响(P>0.05)。结论 SHP2过表达促进LX-2细胞增殖,而SHP2低表达则引起LX-2细胞增殖下降,PI3K/Akt信号通路参与了SHP2对LX-2细胞增殖的调控

    Abstract:

    Objective To explore the effects of the expression changes of SH2 domain-containing protein tyrosine phosphatase 2 (SHP2) on the proliferation of human hepatic stellate cells LX-2 and the PI3K/Akt signaling pathway.〖WTHZ〗Methods Using adenovirus as the vector, the wild-type SHP2 gene and the shRNA targeting SHP2 were introduced into LX-2 cells. LX-2 cells were divided into the Control group (transfection of LX-2 cells with DMEM medium instead of adenovirus), the Ad-GFP group (transfection of LX-2 cells with empty virus Ad-GFP), the Ad-shRNA/SHP2 group (transfection of LX-2 cells with adenovirus carrying the shRNA targeting SHP2), and the Ad-SHP2 group (transfection of LX-2 cells with adenovirus carrying the wild-type SHP2). Real-time fluorescence quantitative PCR and Western blot were used to detect the expression of SHP2 and Akt in LX-2 cells. The CCK-8 method was used to detect the proliferation of LX-2 cells. Western blot was used to detect the expression of phosphorylated Akt (p-Akt) in LX-2 cells. Results The exogenous wild-type SHP2 gene and shRNA targeting SHP2 were successfully introduced into LX-2 cells, and the expressions of SHP2 in LX-2 cells were upregulated and downregulated (P<0.05). Overexpression of SHP2 significantly increased the proliferation and expression of p-Akt (P<0.05), while low expression of SHP2 significantly reduced the proliferation and expression of p-Akt in LX-2 cells (P<0.05). Nevertheless, overexpression and low expression of SHP2 had no significant effect on the expression of Akt protein and mRNA in LX-2 cells (P>0.05). Conclusion Overexpression of SHP2 promotes the proliferation, while low expression of SHP2 leads to a decrease of the proliferation in LX-2 cell. The PI3K/Akt signaling pathway mediates the regulation of SHP2 on the proliferation in LX-2 cell

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  • 在线发布日期: 2026-07-20
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