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食脂肪差异调节骨髓衍生的巨细胞对TLR4和NOD2激动剂的反应
Michael G Shehat1, Madelyn H Miller1, Ashley N Calder2
1Immunity and Pathogenesis Division, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, USA.
Innate immunity
|August 7, 2023
概括
饮食中的脂肪成分会影响免疫反应. 高脂肪饮食 (HFD) 改变了巨细胞对细菌产品的敏感性,高不和脂肪或高和脂肪饮食降低了核酸结合氧化域2 (NOD2) 激活剂的反应性.
科学领域:
- 免疫学 免疫学 免疫学
- 营养科学 营养科学
- 代谢性疾病研究研究
背景情况:
- 高脂肪饮食 (HFD) 与肥胖和代谢功能障碍有关,部分原因是慢性炎症.
- 巨细胞炎症是由细菌产品和食脂肪酸 (FA) 引发的.
- 核酸结合寡合化域2 (NOD2) 感知细菌酸糖,其功能障碍导致代谢问题.
研究的目的:
- 为了研究不同脂肪酸成分的HFD如何影响NOD2依赖的巨细胞反应.
- 确定饮食中不和脂肪与和脂肪对免疫细胞对细菌成分敏感性的影响.
主要方法:
- 野生型小鼠被食控制饮食 (CD),混合脂肪比例的HFD,高不和脂肪饮食 (HUFD) 或高和脂肪饮食 (HSFD).
- 在饮食干预后评估了对托尔类受体4 (TLR4) 和NOD2激动剂的巨细胞反应.
主要成果:
- 具有同等和脂肪和不和脂肪的HFD增强了巨细胞对LPS (TLR4激动剂) 的反应能力,但不是MDP (NOD2激动剂).
- 与CD组相比,HUFD和HSFD都显著降低了巨细胞对NOD2激动剂的反应能力.
- 饮食中的脂肪酸成分调节了巨细胞对细菌感知通路的敏感性.
结论:
- 饮食中的脂肪酸成分在调节巨细胞对细菌产品的反应中起着至关重要的作用.
- HFD中的特定脂肪配置可以抑制NOD2介导的免疫传感,可能会影响代谢健康.
- 这些发现强调需要考虑有关免疫功能和代谢疾病的HFD中的FA组成.
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