胰岛素和IGF-1对CD4+ T细胞线粒体,新陈代谢和功能都有重叠和独特的影响
Kaitlin Kiernan1, Yazan Alwarawrah2, Amanda G Nichols2
1Department of Immunology, Duke University School of Medicine, Durham, NC, USA.
Scientific reports
|February 21, 2024
概括
胰岛素和IGF-1对CD4+T细胞的影响不同. IGF-1 独特地促进了 Th17 细胞的 IL-17 生产和代谢,同时通过线粒体提供细胞保护.
科学领域:
- 免疫学 免疫学 免疫学
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
背景情况:
- 胰岛素和胰岛素样生长因子1 (IGF-1) 是关键的代谢激素,通过胰岛素受体 (IR) 和IGF-1受体 (IGF-1R) 信号传递,影响CD4+T细胞功能.
- 这些激素及其受体在CD4+T细胞子集中的不同作用尚未完全阐明.
研究的目的:
- 通过IR和IGF-1R界定胰岛素和IGF-1信号传递在CD4+T细胞激活和分化中的特定和不同的作用.
- 研究IGF-1对Th17细胞和线粒体功能的独特影响.
主要方法:
- 在激活和分化的CD4+T细胞 (包括Th17细胞) 中分析IR和IGF-1R表达.
- 用胰岛素或IGF-1刺激的CD4+T细胞中的代谢变化的评估.
- 在IGF-1刺激下对Th17细胞中的IL-17产生,线粒体膜潜力和线粒体活性氧物种 (mROS) 的评估.
- 研究IR和IGF-1R在介导IGF-1的线粒体作用中的作用.
主要成果:
- IGF-1R表达,但不是IR,在CD4+T细胞激活和Th17分化时增加.
- 胰岛素和IGF-1都增强了CD4+T细胞代谢,胰岛素显示出更强大的作用.
- 在Th17细胞中,IGF-1独特地刺激IL-17的产生和代谢.
- IGF-1 降低了 Th17 细胞中的线粒体膜潜力和 mROS,从而赋予了细胞保护.
- 无论是IR还是IGF-1R都是IGF-1的线粒体作用所必需的,这表明混合受体的作用.
结论:
- 在CD4+T细胞激活和Th17分化过程中,IGF-1R被上调,这表明在这些过程中具有特定的作用.
- IGF-1在Th17细胞上发挥独特的功能,包括增强IL-17的产生和代谢,并通过线粒体调节提供细胞保护.
- 混合IR/IGF-1R信号可能会调解IGF-1对Th17细胞线粒体功能的影响.
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