过去的肥胖症引发了先天免疫力的持续性表观遗传变化,并加剧了神经炎症
Masayuki Hata1,2, Elisabeth M M A Andriessen3, Maki Hata1
1Department of Ophthalmology, Maisonneuve-Rosemont Hospital Research Centre, University of Montreal, Montreal, Quebec H1T 2M4, Canada.
概括
过去的肥胖会重编程免疫系统,导致神经炎症和视力丧失, 这种免疫记忆有助于与年龄相关的黄斑退化和其他衰老疾病.
科学领域:
- 免疫学
- 神经科学
- 眼科 眼科
背景情况:
- 与年龄相关的黄斑变性 (AMD) 是导致失明的主要原因,
- 由于累积寿命的影响,慢性健康状况可能会产生持久影响.
研究的目的:
- 调查早期饮食诱导的肥胖如何影响天生的免疫系统,并导致神经炎症和视力丧失.
- 确定肥胖与AMD病变的分子机制.
主要方法:
- 在与衰老相关的模型中研究了饮食诱导的肥胖对先天免疫系统的长期影响.
- 分析了骨髓细胞中的分子变化,包括染色体重塑和代谢变化.
- 评估了对视网膜病理的影响,包括血管生成和神经元退化.
主要成果:
- 即使在新陈代谢正常化之后,
- 通过托尔类受体4 (TLR4) 改变了染色素和AP-1的结合,促进了炎症.
- 骨髓细胞从氧化化转向糖解,增加了促炎细胞因子的转录.
- 这种重编程加剧了视网膜血管生成和神经元退化,
结论:
- 肥胖病史可能会永久改变免疫细胞功能,
- 了解这些长期免疫变化对于制定预防或治疗与年龄相关的视力损失的策略至关重要.
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