全球转录基因分析显示尼古丁胺代谢是巨细胞中氧化物调节的干扰素-γ反应的关键调节者
Avik Chattopadhyay1, Sai Shyam2, Shreyasee Das1
1Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India.
Cytokine
|August 29, 2025
概括
干扰素- (IFN-γ) 诱导氧化物 (NO) 依存的巨细胞变化,影响细胞存活和代谢. 这项研究显示NO
科学领域:
- 免疫学
- 细胞生物学
- 代谢学
背景情况:
- 干扰素- (IFN-γ) 是一种重要的免疫反应调节剂.
- 由氧化合成酶 (NOS) 2产生的氧化 (NO) 是IFN-γ反应的关键媒介.
- 和IFN-γ诱导的细胞变化之间的相互作用仍然不完全理解.
研究的目的:
- 研究NO对IFN-γ诱导的转录和代谢变化的影响.
- 确定IFN-γ激活过程中NO调节的特定基因和代谢途径.
- 在免疫反应中探索NO依赖的代谢变化的功能相关性.
主要方法:
- 使用IFN-γ治疗的RAW 264.7巨细胞系,有或没有NO抑制.
- 用于转录组分析的大量RNA测序.
- 乳酸,NAD+和酸盐水平的测量;细胞存活测定;蛋白质与蛋白质相互作用网络分析.
主要成果:
- IFN-γ诱导了依赖NO的乳酸盐产生和细胞存活率的降低.
- NO调节了IFN-γ响应基因的一个子集,包括瘤抑制剂Klf6和细胞因子调节剂Zfp36.
- IFN-γ上调尼古丁胺代谢基因 (Nampt,Pnp),导致以NO依赖的方式增加NAD+.
结论:
- 氧化显著影响巨细胞中的IFN-γ驱动的转录和代谢重编程.
- 尼古丁胺代谢的NO依赖调节,特别是NAD+的产生,在免疫反应中具有生物学意义.
- 这些发现突显了NO,IFN-γ和代谢途径之间的新联系,这可能对疾病产生影响.
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