Overexpression of Annexin A2 promotes proliferation by forming a Glypican 1/c-Myc positive feedback loop: prognostic significance in human glioma.

Overexpression of Annexin A2 promotes proliferation by forming a Glypican 1/c-Myc positive feedback loop: prognostic significance in human glioma.
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膜联蛋白 A2 的过度表达通过形成磷脂酰肌醇蛋白聚糖 1/c-Myc 正反馈环促进增殖:对人类神经胶质瘤的预后意义

DOI:
10.1038/s41419-021-03547-5
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发表时间:
2021-03-12
影响因子:
9
通讯作者:
Wang S
Wang S
中科院分区:
生物学1区
文献类型:
--
作者:
Li X;Nie S;Lv Z;Ma L;Song Y;Hu Z;Hu X;Liu Z;Zhou G;Dai Z;Song T;Liu J;Wang S

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为了建立一个可靠的预测胶质瘤分级和预后的系统,我们阐明了膜联蛋白A2(ANXA 2)与磷脂酰肌醇蛋白聚糖1(GPC 1)之间复杂的相互作用,并论证了ANXA 2和GPC 1联合指标是否能提高胶质瘤患者的预后评估。我们发现ANXA 2以c-Myc依赖的方式诱导胶质瘤细胞增殖。ANXA 2通过c-Myc上调GPC 1的表达,上调的GPC 1进一步促进c-Myc的表达,形成正反馈环,最终导致胶质瘤细胞增殖增强。ANXA 2的mRNA和蛋白水平在胶质瘤组织中均上调,并与GPC 1的过表达相一致。此外,我们利用组织微阵列(TMAs)和免疫组化证实ANXA 2和GPC 1均高表达的胶质瘤患者具有较高的肿瘤复发率和较短的总生存期(OS)。结论ANXA 2的过表达通过形成GPC 1/c-Myc正反馈环促进胶质瘤细胞增殖,ANXA 2及其下游靶点GPC 1可能成为预测胶质瘤患者预后的潜在“联合生物标志物”。
In order to set up a reliable prediction system for the tumor grade and prognosis in glioma patients, we clarify the complicated crosstalk of Annexin A2 (ANXA2) with Glypican 1 (GPC1) and demonstrate whether combined indexes of ANXA2 and GPC1 could improve the prognostic evaluation for glioma patients. We found that ANXA2-induced glioma cell proliferation in a c-Myc-dependent manner. ANXA2 increased the expression of GPC1 via c-Myc and the upregulated GPC1 further promoted the c-Myc level, forming a positive feedback loop, which eventually led to enhanced proliferation of glioma cells. Both mRNA and protein levels of ANXA2 were upregulated in glioma tissues and coincided with the overexpression of GPC1. Besides, we utilized tissue microarrays (TMAs) and immunohistochemistry to demonstrate that glioma patients with both high expression of ANXA2 and GPC1 tended to have higher rate of tumor recurrence and shorter overall survival (OS). In conclusion, the overexpression of ANXA2 promotes proliferation of glioma cells by forming a GPC1/c-Myc positive feedback loop, and ANXA2 together with its downstream target GPC1 could be a potential “combination biomarker” for predicting prognosis of glioma patients.
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