性别不同影响脂肪组织储存中的亲炎性细胞子集 在饮食诱导肥胖模型中
Lisa T Schuetz1,2,3,4,5, Gayel Duran1,4, Paulien Baeten1,4
1Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium.
Biology of sex differences
|December 19, 2024
概括
肥胖在性别之间对脂肪组织中的免疫细胞产生不同的影响. 雌性小鼠在内脏脂肪中表现出较早的炎症,而雄性小鼠在内脏脂肪中表现出较高的炎症酶激活,揭示了高脂肪饮食的性别特异性免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 内分泌学 在内分泌学.
- 代谢疾病 代谢疾病
背景情况:
- 肥胖是一个全球性的健康危机,与许多疾病有关,包括心血管疾病,2型糖尿病和癌症.
- 临床前肥胖研究主要使用雄性小鼠,因为它们的体重增加速度更快,炎症标志物更清晰.
- 肥胖对免疫反应和组织炎症的影响的性别差异尚未完全理解.
研究的目的:
- 为了研究和比较雄性和雌性小鼠之间的脂肪组织 (AT) 炎症,在高脂肪饮食 (HFD) 诱导的脂肪的同等阶段.
- 在HFD条件下,阐明不同脂肪库 (内脏和皮下) 中的性别特异性免疫细胞反应.
- 为了将系统性炎症标志物与男性和女性的局部AT炎症相关联.
主要方法:
- 在使用标准化高脂肪饮食 (HFD) 的雄性和雌性小鼠中诱导肥胖.
- 脂肪组织 (AT) 免疫细胞群和炎症标志物在匹配的脂肪水平 (%AT/体重) 的比较分析.
- 在血中测量促炎细胞因子,并评估内脏AT内的髓状细胞中炎症酶激活的情况.
主要成果:
- 与雄性相比,雌性小鼠在较低脂肪水平的内脏AT中显示出更多的亲炎性免疫细胞,而在较高脂肪水平时,这种效应会减弱.
- 免疫细胞透到皮下AT在雌性小鼠中唯一观察到的是在HFD之后.
- 血中的促炎细胞因子反映了两性内脏AT炎症,而雄性小鼠在内脏AT髓质细胞中独特地显示出更高的炎症酶激活.
结论:
- 肥胖会影响免疫细胞在脂肪组织中的分布和激活,而这取决于性别.
- 与雄性相比,雌性小鼠在内脏和皮下脂肪储存中表现出明显的炎症模式.
- 了解这些基于性别的差异对于开发有针对性的肥胖干预和治疗至关重要.
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