高胆固醇饮食对寒冷耐受性的影响在Drosophila中高度取决于环境
Mitchell C Allen1, Marshall W Ritchie1, Mahmoud I El-Saadi1
1Department of Biology, Carleton University, 1125 Colonel By Dr, Ottawa, Ontario, K1S 5B6, Canada.
Journal of thermal biology
|February 10, 2024
概括
饮食中的胆固醇可以改善果的急性冷却损伤,但会恶化慢性冷却损伤. 这表明了不同的损伤机制,并且胆固醇可能会干扰寒冷适应过程.
科学领域:
- 昆虫生理学 昆虫生理学
- 分子生物学分子生物学
- 环境应激反应环境应激反应
背景情况:
- 昆虫经历冷却损伤通过基于冷却持续时间和严重性的独特机制.
- 急性冷却损伤与细胞膜脂质相转变有关,而慢性冷却会破坏恒温.
- 饮食中的胆固醇显示有潜力减轻Drosophila melanogaster的急性冷却损伤.
研究的目的:
- 为了研究高胆固醇饮食对果寒冷耐受性的影响.
- 确定热适应如何与饮食中的胆固醇相互作用以影响冷却损伤.
- 阐明胆固醇对急性和慢性伤的作用背后的机制.
主要方法:
- 果 (Drosophila melanogaster) 接受了含有或不含胆固醇补充的饮食.
- 被适应不同的温度 (冷和热),以评估热适应效应.
- 使用各种测定方法测量冷却耐受性,包括急性和慢性冷却后的生存和恢复.
主要成果:
- 胆固醇补充剂提高了温暖适应的对急性冷却的耐受性.
- 相反,高胆固醇饮食降低了对寒冷适应的慢性冷却和急性冷却的耐受性.
- 胆固醇没有影响感冒活动或压力后恢复,这表明对伤有特定影响.
结论:
- 饮食中的胆固醇可能会在急性冷却期间减少直接的膜损伤.
- 急性和慢性感冒涉及不同的伤害机制,胆固醇对它们的影响不同.
- 高胆固醇饮食可能会损害寒冷适应,增加对某些冷却条件的易感性.
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