单细胞细胞表面的氨酸结合蛋白调节糖尿病患者的炎症前反应
Andrew Jun Wang1, Aimin Wang1, Vincent Hascall1
1Department of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio 44195, USA.
Journal of allergy and infectious diseases
|April 15, 2024
概括
氨酸通过被单细胞原生细胞内化来防止糖尿病的亲炎性巨细胞的形成. 这揭示了氨酸在调节免疫细胞功能和糖尿病并发症方面的新机制.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 糖尿病学 糖尿病学
背景情况:
- 糖尿病并发症,如脏和心血管疾病,与骨髓衍生白细胞的慢性炎症有关.
- 过高血糖会诱导巨细胞的前代细胞合成氨酸,促进促炎性巨细胞 (Mpi).
- 低度的肝素 (~50 nM) 之前抑制了氨酸的合成,并促进了组织修复巨细胞 (Mtr).
研究的目的:
- 在糖尿病的背景下阐明肝素调节单细胞和巨细胞功能的分子机制.
- 为了研究单细胞原生细胞对肝素的内化.
- 为了识别参与肝素作用的细胞表面蛋白质.
主要方法:
- 在分裂单细胞原生细胞中研究了肝素内部化.
- 利用了细胞表面蛋白质识别技术.
- 分析了已识别的肝素结合蛋白的作用.
主要成果:
- 肝素通过分裂单细胞原生细胞而被内化.
- 确定了α-enolase (ENO-1) 和cofilin-1作为单细胞表面上丰富的肝素结合蛋白.
- 这些蛋白质,ENO-1和cofilin-1,已知具有细胞内作用,并与自身免疫性疾病有关,也可以在细胞表面找到.
结论:
- 肝素的机制涉及单细胞原生细胞的内部化.
- 表面蛋白质alpha-enolase和cofilin-1是肝素作用的关键媒介.
- 这项研究为肝素在调节单细胞/巨细胞功能中的作用提供了新的见解,可能会影响糖尿病并发症.
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