谷氨酸中的GLS1媒介冗余性通过激活NMDAR/Ca2+/β-Catenin通路加速动脉化
Ziting Zhou1, Bing Dong1, Dayu He1
1Department of Cardiology, Joint Laboratory of Guangdong-Hong Kong-Macao Universities for Nutritional Metabolism and Precise Prevention and Control of Major Chronic Diseases, the Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen, Guangdong, 518033, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|April 28, 2025
概括
谷氨酸酶1 (GLS1) 活性会提高谷氨酸水平,在慢性病 (CKD) 患者中促进动脉化. 抑制GLS1或谷氨酸通过阻断特定的细胞信号通路来减少化.
科学领域:
- 生物化学 生物化学
- 心血管生物学 心血管生物学
- 腎臟病學 (nephrology) 是一種醫學.
背景情况:
- 动脉化是慢性病 (CKD) 中心血管事件和死亡率的重要危险因素.
- 谷氨酸酶1 (GLS1) 是一种参与谷氨酸代谢的酶,与心血管疾病有关,但其在动脉化中的作用尚不清楚.
研究的目的:
- 研究GLS1介导的谷氨酸酸生产在CKD动脉化发展中的作用.
- 阐明将GLS1活动与血管光滑肌细胞 (VSMC) 骨质性重编程联系起来的分子机制.
主要方法:
- 患者样本的液体染色学-并联质谱学 (LC-MS/MS) 分析.
- 在体外研究涉及GLS1抑制剂,GLS1倒置和谷氨酸的管理.
- 对N-甲基-d-酸盐受体 (NMDAR) 激活,Ca2+ 流入,ERK 酸化和β-Catenin 信号的分析.
主要成果:
- 慢性病患者表现出高GLS1活性,由增加的谷氨酸/谷氨胺比率表明.
- GLS1的活性和表达与动脉化进展正相关.
- 抑制或淘汰GLS1可以缓解骨质再编程,而谷氨酸会加剧骨质再编程.
- GLS1衍生的谷氨酸激活NMDAR,导致Ca2+流入,ERK酸化和β-Catenin介导的VSMC骨质再生编程.
结论:
- 在CKD中,GLS1是动脉化的关键媒介.
- 由GLS1产生的谷氨酸通过依赖NMDAR的信号通路驱动动动脉.
- 向GLS1可能提供一种治疗策略,用于预防或治疗CKD患者的动脉化.
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