PPARα可以调节-CoA氧化酶1 (ACOX1) 的作用,但不能调节酶的作用
Xue Chen1, Anna Mazur1, Wei Xu1
1Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1700 3rd Avenue, Huntington, WV, 25755, USA.
Biochemical and biophysical research communications
|June 28, 2025
概括
过氧体增殖器激活受体α (PPARα) 调节-CoA氧化酶1 (ACOX1) 但不调节酶,影响过氧体功能和过氧化代谢. 这一发现澄清了PPARα.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 过氧体是参与脂肪酸代谢和活性氧物种排毒的重要器官.
- 过氧体膜蛋白70 (PMP70) 和-CoA氧化酶1 (ACOX1) 是关键的过氧体标记物和酶.
- catalase通过 ACOX1 在脂肪酸氧化过程中产生的过氧化 (H2O2) 进行排毒.
研究的目的:
- 为了研究氧酶增殖器激活受体α (PPARα) 对ACOX1和酶表达的调节作用.
- 为了阐明多氧体酶在多氧体增殖和回归过程中的差异调节.
主要方法:
- 在小鼠中使用PPARα激动剂WY-14,643诱导过氧酶体增殖.
- 在WY-14,643治疗和停药后分析PMP70,ACOX1和catalase的蛋白质和mRNA水平.
- 利用肝脏特异性PEX16淘汰赛小鼠和PPARα缺乏的小鼠来评估PPARα依赖性调节.
主要成果:
- WY-14,643诱导了PMP70,ACOX1和酶,其中ACOX1的诱导作用大于酶.
- 在WY-14,643撤销后,ACOX1水平下降,而催化酶水平仍然升高.
- 在PEX16淘汰赛小鼠中,PPARα激活上调调调节了ACOX1蛋白和mRNA,但不是催化酶.
结论:
- PPARα直接调节ACOX1的表达,有助于过氧体的增殖.
- 酶表达不是由PPARα直接调节的,这表明有不同的调节机制.
- 这些发现凸显了PPARα对过氧体酶的差异性控制.
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