2025年4月5日,上海交通大学医学院附属新华医院检验科郑英霞教授团队在权威期刊Journal for Immunotherapy of Cancer发表题目为“PRMT5 deficiency in myeloid cells reprograms macrophages to enhance antitumor immunity and synerg...2025年4月5日,上海交通大学医学院附属新华医院检验科郑英霞教授团队在权威期刊Journal for Immunotherapy of Cancer发表题目为“PRMT5 deficiency in myeloid cells reprograms macrophages to enhance antitumor immunity and synergizes with anti-PD-L1 therapy”的研究论文。该研究揭示了蛋白精氨酸甲基转移酶5(protein arginine methyltransferase 5,PRMT5)通过STAT6-PPARγ途径调节脂质代谢,促进单核巨噬细胞的迁移和分化,促进巨噬细胞向M2型极化。在小鼠髓系细胞中特异性敲除Prmt5(Prmt5 cKO)并进行肿瘤模型构建,发现在敲除鼠中肿瘤相关巨噬细胞发生重编程,抗肿瘤活性增强,抑制肿瘤进展并显著增强抗程序性死亡受体配体1(programmed death-ligand 1,PD-L1)的免疫治疗效果。该研究结果提示靶向髓系细胞中的PRMT5有望为癌症免疫治疗提供一种新的方法。展开更多
Maintenance of the Golgi apparatus （GA） structure and function depends on Golgi matrix proteins. The posttranslational modification of Golgi proteins such as phosphorylation of members of the golgin and GRASP famili...Maintenance of the Golgi apparatus （GA） structure and function depends on Golgi matrix proteins. The posttranslational modification of Golgi proteins such as phosphorylation of members of the golgin and GRASP families is important for determining Golgi architecture. Some Golgi proteins including golgin-84 are also known to be methylated, but the function of golgin methylation remains unclear. Here, we show that the protein arginine methyltransferase 5 （PRMT5） localizes to the GA and forms complexes with several components involved in GA ribbon formation and vesicle tethering. PRMT5 interacts with the golgin GM130, and depletion of PRMT5 causes defects in Golgi ribbon formation. Furthermore, PRMT5 methylates N-terminal arginines in GM130, and such arginine methylation appears critical for GA ribbon formation. Our findings reveal a molecular mechanism by which PRMT5-dependent arginine methylation of GM130 controls the maintenance of GA architecture.展开更多
文摘2025年4月5日,上海交通大学医学院附属新华医院检验科郑英霞教授团队在权威期刊Journal for Immunotherapy of Cancer发表题目为“PRMT5 deficiency in myeloid cells reprograms macrophages to enhance antitumor immunity and synergizes with anti-PD-L1 therapy”的研究论文。该研究揭示了蛋白精氨酸甲基转移酶5(protein arginine methyltransferase 5,PRMT5)通过STAT6-PPARγ途径调节脂质代谢,促进单核巨噬细胞的迁移和分化,促进巨噬细胞向M2型极化。在小鼠髓系细胞中特异性敲除Prmt5(Prmt5 cKO)并进行肿瘤模型构建,发现在敲除鼠中肿瘤相关巨噬细胞发生重编程,抗肿瘤活性增强,抑制肿瘤进展并显著增强抗程序性死亡受体配体1(programmed death-ligand 1,PD-L1)的免疫治疗效果。该研究结果提示靶向髓系细胞中的PRMT5有望为癌症免疫治疗提供一种新的方法。
文摘Maintenance of the Golgi apparatus （GA） structure and function depends on Golgi matrix proteins. The posttranslational modification of Golgi proteins such as phosphorylation of members of the golgin and GRASP families is important for determining Golgi architecture. Some Golgi proteins including golgin-84 are also known to be methylated, but the function of golgin methylation remains unclear. Here, we show that the protein arginine methyltransferase 5 （PRMT5） localizes to the GA and forms complexes with several components involved in GA ribbon formation and vesicle tethering. PRMT5 interacts with the golgin GM130, and depletion of PRMT5 causes defects in Golgi ribbon formation. Furthermore, PRMT5 methylates N-terminal arginines in GM130, and such arginine methylation appears critical for GA ribbon formation. Our findings reveal a molecular mechanism by which PRMT5-dependent arginine methylation of GM130 controls the maintenance of GA architecture.
