在非人类灵长类模型中,衰老导致改变生理反应,以应对反复的社会分离压力
Aaryn Mustoe1, Jessica Greig1, Addaline Alvarez1
1Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
社会孤立会影响老龄化. 较年长,应激反应较弱的马尔莫塞特 (下丘脑-垂体-上腺轴) 显示出较差的健康和社会结果,尤其是男性.
科学领域:
- 老年学是一门学科.
- 神经内分泌学神经内分泌学
- 灵长类的社会行为
背景情况:
- 社会关系对于老龄人口的健康和福祉至关重要.
- 社会孤立影响了近25%的65岁及以上的成年人,需要对其健康影响进行研究.
- 了解衰老中的压力反应对于解决健康差异至关重要.
研究的目的:
- 为了研究与年龄相关的下丘脑-垂体-上腺 (HPA) 轴活动,新陈代谢和免疫功能以及社会压力下的海的社会行为方面的差异.
- 在重复的社会分离挑战 (SSC) 中,比较 HPA 反应和恢复在近年老年和老年老年海豚.
- 为了确定不同的HPA反应概况,以及它们与老龄化小熊猫的健康和行为结果的关联.
主要方法:
- 利用非人类灵长类动物模型 () 研究社会衰老.
- 在SSC期间评估HPA轴活动,代谢标记 (血糖),免疫标记 (中性粒细胞,白细胞) 和社会行为 (修饰,接近).
- 马尔莫塞特被分为不同的HPA反应组:反应器和非反应器.
主要成果:
- 雌性海豚,特别是近年老年动物,比雄性表现出更高的HPA反应性和更快的恢复,尽管这种性别差异在非常年老的个体中减少了.
- HPA活性与机动行为,美容,血糖水平和中性粒细胞计数相关.
- 具有较低HPA反应 (非反应体) 的海豚在聚会期间体重增加较少,和含量增加,白细胞数量增加,社交接触减少.
- 一种独特的HPA非反应型表型在衰老的雄性海中更为普遍.
结论:
- 衰弱的HPA反应在老年海与增加的脆弱性与负面的健康和行为结果在社会压力下.
- 在老化过程中,雄性海可能更容易在老化过程的早期发展HPA非反应型表型.
- 这些发现突显了HPA轴功能在调解衰老期间社会压力的健康后果方面的重要性.
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