谷氨胺代谢改善了左心室功能,但在心肌梗塞之后并没有引起巨细胞介导的炎症
Alan J Mouton1,2, Nikaela M Aitken1, Jemylle G Morato1
1Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi, United States.
American journal of physiology. Cell physiology
|July 9, 2024
概括
在心肌梗塞 (MI) 后,心脏和免疫细胞中的谷氨胺代谢发生变化. 补充谷氨酸可以改善心脏功能后MI,而抑制它会使功能恶化,突出谷氨酸.
科学领域:
- 心血管生物学 心血管生物学
- 代谢调节 代谢调节 代谢调节
- 免疫代谢过程中的免疫代谢.
背景情况:
- 谷氨酸是细胞能量和功能的重要氨基酸.
- 它在心肌梗塞 (MI) 后心脏重塑中的作用尚不清楚.
- 心脏和免疫细胞利用谷氨来获得能量和信号.
研究的目的:
- 调查谷氨胺代谢在心脏心脏病发作后心脏重塑中的作用.
- 为了确定谷氨胺补充剂或抑制对心脏功能和巨细胞活动后MI的影响.
主要方法:
- 成年雄性小鼠接受了永久的左前下垂动脉封闭以诱导心脏病发作.
- 非向的代谢学分析了心脏组织中的代谢物和分离的巨细胞.
- 对心脏细胞和巨细胞进行了基因表达和生物能评估.
- 在MI后,小鼠接受了谷氨或BPTES (谷氨酶-1抑制剂).
主要成果:
- 谷氨胺代谢在心脏偏远区域和心脏病发作巨细胞中发生变化.
- 谷氨胺的使用改善了左心室 (LV) 功能和心脏基因表达.
- BPTES的使用使得MI后的LV功能恶化.
- 无论是谷氨酸还是BPTES都没有改变巨细胞基因表达或生物能学.
结论:
- 谷氨胺代谢对于在心脏病发作后维持 LV 功能至关重要.
- 谷氨胺补充剂可以提高MI后的LV功能.
- 在这种情况下,对谷氨胺代谢的药理学操纵不会影响巨细胞的功能.
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