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通过依赖乳酸的转录调节,PKM2控制着耳的发育
Mingxuan Wu1,2, Gaogan Jia1,2, Yaoqian Liu1,2
1ENT Institute and Otorhinolaryngology Department of Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.
概括
由酸盐激酶M2 (PKM2) 驱动的糖解质代谢对于内耳发育和毛细胞再生至关重要. PKM2活动和随后的乳酸盐生产在表观遗传学上调节了对感觉上皮质形成至关重要的基因表达.
科学领域:
- 发展生物学 发展生物学
- 代谢调节 代谢调节 代谢调节
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 在内耳发育过程中,代谢过程对细胞增殖和分化至关重要.
- 葡萄糖代谢在哺乳动物内耳发育和毛细胞再生中的作用尚不清楚.
- 了解这些代谢途径是识别毛细胞再生的目标的关键.
研究的目的:
- 研究葡萄糖代谢在哺乳动物内耳发育和毛细胞再生中的作用.
- 阐明代谢途径影响耳发育的具体机制.
- 探索针对毛发细胞再生的代谢途径的潜力.
主要方法:
- 在小鼠和人类耳前感官表皮质中分析糖解活性.
- 使用小鼠耳器官来研究酸激酶M2 (PKM2) 删除的影响.
- 采用PKM2淘汰赛小鼠来评估感官上皮质形态发生.
- 研究基因组H3乳化 (H3K9la) 以及它对基因转录的影响.
- 检查PKM2在支细胞 (SCs) 中过度表达对耳扩张器毛细胞生成的影响.
主要成果:
- 在老鼠和人类的耳前感官上皮质扩张过程中,糖溶性新陈代谢非常活跃.
- PKM2是耳非感官上皮细胞中占主导地位的糖解酶.
- 删除PKM2将新陈代谢从糖解转移到氧化酸化,损害有机体的形成和感觉上皮的发展.
- 通过PKM2产生的乳酸促进了组织素H3的乳化,上调SOX基因转录,有助于耳发育.
- 在SC中PKM2的过度表达增强了小鼠和人类耳扩展器的毛细胞生成.
结论:
- 通过PKM2调解并导致乳酸盐产生的糖解是内耳感觉上皮质形成的关键驱动因素.
- 这种糖解-乳酸盐-基因素乳化途径在表观遗传上调节了对耳发育至关重要的基因.
- 准PKM2和糖解-乳酸盐通路为哺乳动物毛细胞再生提供了一个新的策略.
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