Utilizing beige fat to improve muscle function after rotator cuff repair

123 项目描述 45 肩袖（RC）撕裂是肩部疼痛的一种非常常见的原因， 残疾。超过50%的65岁以上的患者有证据表明， 6789 钢筋混凝土撕裂此外，无症状袖带小撕裂的患者倾向于进展为 更大的有症状的撕裂小RC撕裂的手术修复结局良好， 但是在大面积RC撕裂的手术治疗中成功有限。 11 01 大量的RC撕裂与肩袖肌肉的脂肪浸润有关。 发生脂肪浸润的大RC撕裂患者的临床结局较差 11 23 以及在尝试修复后的更高故障率。我们以前发现，一个新的 发现的干细胞群--脂肪细胞/脂肪细胞祖细胞（FAP）细胞--在 11 45 RC损伤后脂肪浸润的发展。此外，这些细胞具有类似的 米色脂肪细胞系的表达模式，一个独特的细胞群， 11 67 独特的产热和代谢能力，可以改善肌肉功能。 11 89 这项研究将利用我们研究充分的动物模型和一种新的修复模型， 评估FAP细胞通过以下途径改善肌肉功能的机制： 22 01 在小鼠和人组织中，脂肪细胞分化为米色脂肪表型。了解 FAP细胞和米色脂肪细胞之间的关系以及利用这些细胞 内源性和外源性治疗策略可以帮助改善肌肉质量， RC修复以及其他肌肉损伤状态。

123 PROJECT DESCRIPTION 45 Rotator cuff (RC) tears are an extremely common cause of shoulder pain and disability. Up to 50% of patients greater than the age of 65 years of age have evidence 6789 of a RC tear. In addition, patients with small asymptomatic cuff tears tend to progress to larger, symptomatic tears. The outcomes of surgical repair of small RC tears are good, but there has been limited success in the surgical treatment of massive RC tears. 11 01 Massive RC tears have been linked with fatty infiltration of the rotator cuff muscles. Patients with large RC tears who develop fatty infiltration have poorer clinical outcomes 11 23 and higher rates of failure after attempted repair. We have previously found that a newly discovered stem cell population-fibro/adipocyte progenitor (FAP) cells-is critical in the 11 45 development of fatty infiltration after RC injury. Further, these cells share similar expression patterns with the beige adipocyte lineage, a distinct cell population that has 11 67 unique thermogenic and metabolic capabilities that could improve muscle function. 11 89 The study will leverage our well-studied animal model and a novel repair model to evaluate the mechanism by which FAP cells can improve muscle function through 22 01 differentiation into a beige fat phenotype in mouse and human tissue. Understanding the relationship between FAP cells and beige adipocytes and utilizing these cells in endogenous and exogenous treatment strategies could help improve muscle quality in RC repair as well as other muscle injury states.