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GNAQ T96S 突变通过磷酸化膜联蛋白 A2,消除了野生型 GNAQ 在自然杀伤/T 细胞淋巴瘤中诱导凋亡的能力

英文原题:GNAQ T96S mutation abrogates the ability of wild-type GNAQ to induce apoptosis by phosphorylating annexin A2 in natural killer/T cell lymphoma.

查看英文原题

GNAQ T96S mutation abrogates the ability of wild-type GNAQ to induce apoptosis by phosphorylating annexin A2 in natural killer/T cell lymphoma.

PubMed 2022/05/13(内容时间) Cancer Sci Q2 · IF 4.9(JCR 2025)

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中文摘要

我们之前的研究通过免疫共沉淀和质谱分析,在转染 GNAQ T96S 突变载体的自然杀伤/T 细胞淋巴瘤 (NKTCL) 细胞中,将膜联蛋白 A2 (ANXA2) 鉴定为 Gaq 相互作用伙伴;然而,GNAQ T96S 可能调控 ANXA2 的详细分子机制在 NKTCL 中仍有待明确。

在此,我们发现 GNAQ T96S 突变显著促进 ANXA2 在 Y24 位点的磷酸化,而 ANXA2 的磷酸化消除了 WT GNAQ 触发细胞凋亡的能力。

进一步研究表明,GNAQ T96S 肽抑制剂通过竞争 ANXA2 与 GNAQ T96S 的结合,在 NKTCL 细胞中诱导凋亡。体内动物实验显示,GNAQ T96S 肽抑制剂抑制携带 GNAQ T96S 突变的 NKTCL 细胞的生长。

我们目前的数据表明 GNAQ T96S/Src/ANXA2 在介导 NKTCL 细胞凋亡中发挥作用,并且 GNAQ T96S 肽可能成为治疗 NKTCL 患者的有前景的药物。

展开英文摘要原文

Our previous study identified annexin A2 (ANXA2) as a Gaq-interacting partner in natural killer/T cell lymphoma (NKTCL) cells transfected with the GNAQ T96S mutation vector by immunoprecipitation and mass spectrometry; however, the detailed molecular mechanisms by which GNAQ T96S might regulate ANXA2 remain to be defined in NKTCL.

Herein, we found that the GNAQ T96S mutation significantly promotes the phosphorylation of ANXA2 at the Y24 site, whereas phosphorylation of ANXA2 abolishes the ability of WT GNAQ to trigger cell apoptosis.

Further investigation revealed that a GNAQ T96S peptide inhibitor induced apoptosis by competing with ANXA2 binding to GNAQ T96S in NKTCL cells. In vivo animal experiments showed that a GNAQ T96S peptide inhibitor suppresses the growth of NKTCL cells carrying the GNAQ T96S mutation.

Our current data suggest a role for GNAQ T96S/Src/ANXA2 in mediating the apoptosis of NKTCL cells, and the GNAQ T96S peptide could be a promising agent for therapy in NKTCL patients.

论文信息

作者
Zhao W、Zhang M、Wang G、Liu E、Jiang G、Zhang Y、Zhang D、Jian X
单位
Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.China
期刊
Cancer science2022 Jul
原文标识
PubMed 35293080 · DOI 10.1111/cas.15333