在白色/色脂肪组织中,Ckmt1对于线粒体生物能量是不可或缺的
Valerie Politis-Barber1, Heather L Petrick1, Arthe Raajendiran2
1Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Rd E, Guelph, ON N1G 2W1, Canada.
Function (Oxford, England)
|November 13, 2023
概括
无用的肌酸循环 (FCC) 不刺激白色脂肪组织 (WAT) 的能量消耗. 线粒体肌酸激酶 (CKMT1) 对于WAT中的能量调节是不可或缺的,与其在棕色脂肪组织 (BAT) 中的拟议作用相反.
科学领域:
- 代谢和内分泌学
- 细胞生物学 细胞生物学
- 线粒体功能的功能
背景情况:
- 假设无用的肌酸循环 (FCC),涉及肌酸激酶B (CKB),以调节棕色脂肪组织 (BAT) 的能量消耗.
- 在白脂肪组织 (WAT) 能量代谢中,FCC和特定的肌酸激酶异型,特别是肌酸激酶线粒体 (CKMT1) 的作用仍然不清楚.
研究的目的:
- 调查FCC在WAT中的存在和功能.
- 确定CKMT1在WAT中调节能耗和线粒体功能的作用.
主要方法:
- 评估肌酸对培养脂肪细胞,分离线粒体和透性WAT的呼吸的影响.
- 在人类WAT中分析CKMT1mRNA和蛋白质表达.
- 评估CKMT1减少或消去的小鼠的能量消耗和线粒体反应,包括在药理刺激和高脂肪饮食养期间.
主要成果:
- 在WAT模型中,肌酸不能增强呼吸.
- 在人类WAT中检测到CKMT1,但其减少没有影响脂肪细胞呼吸.
- 在小鼠中,CKMT1的切除并没有改变能量消耗,线粒体对β-3上腺激活的反应,或高脂肪饮食的影响.
结论:
- CKMT1对于调节WAT中的能源支出是不可或缺的.
- 这些发现不支持在WAT中存在FCC,与BAT不同.
- 这项研究阐明了CKMT1在白色脂肪组织代谢中的有限作用.
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