Metformin promotes cGAS/STING signaling pathway activation by blocking AKT phosphorylation in gastric cancer.

Metformin promotes cGAS/STING signaling pathway activation by blocking AKT phosphorylation in gastric cancer.
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DOI:
10.1016/j.heliyon.2023.e18954
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发表时间:
2023-08
期刊:
影响因子:
4
通讯作者:
Tao, Kaixiong
Tao, Kaixiong
中科院分区:
综合性期刊4区
文献类型:
--
作者:
Shen, Qian;Yang, Lei;Li, Chengguo;Wang, Tao;Lv, Jianbo;Liu, Weizhen;Lin, Yao;Yin, Yuping;Tao, Kaixiong

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cGAS/STING信号通路在调节先天免疫中起着关键作用。新兴的新型药物旨在通过激活天然免疫来调节抗肿瘤免疫应答。据报道,抗糖尿病药物二甲双胍对各种类型的癌症表现出抗癌作用。然而,二甲双胍在胃癌中调节cGAS/STING信号通路的作用仍然未知。在我们的研究中,我们首先使用生物信息学分析来检测二甲双胍在多种肿瘤中与肿瘤免疫密切相关。接下来,我们验证了二甲双胍在胃癌细胞系中激活cGAS/STING信号通路的功能。此外,KEGG通路富集分析显示二甲双胍与胃癌中PI 3 K/AKT信号通路呈负相关。我们进一步验证了二甲双胍通过阻断AKT磷酸化激活cGAS/STING信号通路。此外,我们发现二甲双胍通过介导转录因子SOX 2调节AKT信号通路。因此,我们的研究表明,二甲双胍通过抑制SOX 2/AKT激活cGAS/STING信号通路,在胃癌免疫治疗中具有很好的潜力。
The cGAS/STING signaling pathway plays a pivotal role in regulating innate immunity. Emerging novel drugs aim to regulate the anti-tumor immune response by activating innate immunity. The anti-diabetic drug metformin has been reported to exhibit anti-cancer effect against various types of cancer. However, the role of metformin in regulating the cGAS/STING signaling pathway in gastric cancer remains unknown. In our study, we first used bioinformatic analysis to detect that metformin is closely related to tumor immunity in multiple tumors. Next, we validated the function of metformin in activating the cGAS/STING signaling pathway in gastric cancer cell lines. In addition, KEGG pathway enrichment analysis showed that metformin is negatively correlated with the PI3K/AKT signaling pathway in gastric cancer. We further verified that metformin activates the cGAS/STING signaling pathway by blocking AKT phosphorylation. Moreover, we found that metformin regulates the AKT signaling pathway by mediating the transcription factor SOX2. Thus, our study indicates that metformin activates the cGAS/STING signaling pathway by suppressing SOX2/AKT and has promising potential in gastric cancer immunotherapy.
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