林28通过重新编程细胞代谢来增强组织修复
Ng Shyh-Chang1, Hao Zhu, T Yvanka de Soysa
1Stem Cell Transplantation Program, Division of Pediatric Hematology/Oncology, Boston Children's Hospital and Dana-Farber Cancer Institute, Boston, MA 02115, USA; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Harvard Stem Cell Institute, Boston, MA 02115, USA; Manton Center for Orphan Disease Research, Boston, MA 02115, USA; Howard Hughes Medical Institute, Boston, MA 02115, USA; Department of Medicine, Division of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA.
在成年组织中重新激活Lin28a通过增强细胞能量生产来促进再生. 这种RNA结合蛋白重编程新陈代谢以改善组织修复,为衰老和愈合提供了新的见解.
科学领域:
- 发展生物学 发展生物学
- 再生医学是一种再生医学.
- 分子生物学分子生物学
背景情况:
- 随着年龄的增长,组织再生能力下降,对于增强青春期修复的潜在机制仍然不清楚.
- 林28a是一种RNA结合蛋白,对胚胎发生至关重要,影响发育,多能性和新陈代谢.
- 研究Lin28a在成年人组织修复中的作用可能会揭示新的再生策略.
研究的目的:
- 确定Lin28a的重新激活是否可以增强成年生物的组织修复.
- 阐明Lin28a影响组织再生的分子机制.
- 探索针对Lin28a在再生医学中的治疗应用的潜力.
主要方法:
- 在成年组织损伤模型 (毛囊,软骨,骨,介质细胞) 中对Lin28a表达的工程重活化.
- 评估了头发的再生,软骨,骨和骨间细胞的再生.
- 研究了let-7微RNA抑制和细胞生物能学 (糖解和氧化酸化) 在Lin28a中介修复中的作用.
主要成果:
- 林28a的重新激活显著改善了头发的再生,并加速了软骨,骨和介质细胞的修复.
- 林28a的修复增强需要let-7微RNA抑制,但不仅仅依赖于它.
- 通过增强代谢酶mRNAs的翻译,Lin28a增加了糖解和氧化酸化 (OxPhos).
- 抑制OxPhos抵消了Lin28a的亲再生作用,而药理上增加OxPhos促进了修复.
结论:
- Lin28a通过重新编程细胞生物能量来增强特定成年组织的组织修复.
- 这项研究强调了代谢途径,特别是OxPhos在中介Lin28a的再生作用中的关键作用.
- 针对Lin28a和细胞代谢,为改善老年人群组织修复提供了潜在的治疗途径.
相关概念视频
Inflammatory Response
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Liver Regeneration
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
Role Of Notch Signalling In Intestinal Stem Cell Renewal
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Tissue Renewal without Stem Cells
However, failure of such a system...
Overview of Regeneration and Repair
Regeneration
All animals have varying degrees of...
Tissue Injury: Inflammation and Repair


