在长寿内分泌突变小鼠中,氧化代谢蛋白的协调转录上调
Ahmed M Elmansi1, Richard A Miller2,3
1Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI, USA.
GeroScience
|June 5, 2023
概括
卡路里限制和长寿小鼠模型增加脂肪酸氧化和能量生产. 这种新陈代谢转变涉及减少的共同抑制剂NCOR1,为衰老和新陈代谢提供了新的见解.
科学领域:
- 代谢调节 代谢调节 代谢调节
- 衰老的研究研究.
- 线粒体功能 线粒体功能
背景情况:
- 卡路里限制 (CR) 在动物中延长寿命,增加肝脂肪酸氧化和氧化酸化 (OXPHOS).
- 长寿小鼠模型 (GHRKO,SD) 显示新陈代谢发生变化,但分子机制尚不清楚.
- 了解这些转变对于衰老和代谢疾病研究至关重要.
研究的目的:
- 阐明长寿GHRKO和SD小鼠代谢转变背后的分子机制.
- 研究核受体和共同调节剂在调节脂肪酸氧化和OXPHOS中的作用.
- 为了确定潜在的治疗目标,以控制衰老中的代谢.
主要方法:
- 在GHRKO,SD和对照小鼠的肝脏组织中对基因和蛋白质表达的比较分析.
- 测量脂肪酸β-氧化和OXPHOS酶水平.
- 核受体,联合激活剂 (PGC-1α) 和联合抑制剂 (NCOR1,HDAC3) 表达的评估.
主要成果:
- GHRKO和SD小鼠显示脂肪酸β-氧化酶的mRNA和蛋白质水平增加.
- 多个OXPHOS复杂子单元在GHRKO和SD肝脏中进行上调.
- NCOR1及其辅因子HDAC3显著下调,而核受体和PGC-1α保持不变或下调.
结论:
- 在长寿小鼠中,NCOR1和HDAC3的下调提供了增加脂肪酸氧化和OXPHOS的可信机制.
- 这项研究揭示了对新陈代谢控制和衰老的新见解.
- 在长寿模型中NCOR1在代谢调节中的作用需要进一步研究.
相关概念视频
01:10Transcription
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Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
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