NAT CELL BIOL:干细胞治疗杜氏肌营养不良症

2017-12-19 海北 MedSci原创

已有的研究显示,人多能干细胞(hPSC)可以被定向分化成骨骼肌祖细胞(SMPC)。然而,相对于人胎儿或成人的卫星细胞(骨骼肌干细胞),hPSC-SMPC的肌原性仍不清楚。

已有的研究显示,人多能干细胞hPSC)可以被定向分化成骨骼肌祖细胞(SMPC)。然而,相对于人胎儿或成人的卫星细胞(骨骼肌干细胞),hPSC-SMPC的肌原性仍不清楚。

近日,来自加利福尼亚大学洛杉矶分校的研究人员观察到,与人类卫星细胞相比,通过定向分化衍生的hPSC-SMPC在体外和体内的功能都较差。使用RNA测序,研究人员发现细胞表面受体ERBB3NGFR划分了肌原细胞群,包括人胎儿发育中的PAX7阳性祖细胞和hPSC-SMPC

研究人员证明,hPSC分化来的骨骼肌是不成熟的,但在分化过程中抑制转化生长因子信号转导能够提高融合效率,超微结构的组织,和成人肌球蛋白的表达。在CRISPR-Cas9校正的人类杜氏肌营养不良症多能干细胞-SMPCs中,这种富集和成熟策略能够在肌纤维中重塑肌营养不良蛋白表达。

这项工作提供了一个人类肌肉发育的深入研究,并提供了提高hPSC-SMPCs体内肌原性潜力的候选方式。


原始出处:

Michael R. Hicks et al. ERBB3 and NGFR mark a distinct skeletal muscle progenitor cell in human development and hPSCsNature Cell Biology, 2017; DOI: 10.1038/s41556-017-0010-2


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    2018-05-12 sunylz
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    2018-06-17 维他命
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    2018-05-12 liye789132251
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他汀类药物通过降低低密度脂蛋白或“不良”胆固醇来预防心脏病发作非常有效。然而,10%至20%的服用他汀类药物的患者报告肌肉相关症状,包括疼痛和痉挛,限制了他们使用推荐剂量。服用他汀类药物的患者心血管事件的风险很高,导致医疗保健成本上升。

J Am Coll Nutr.:吃素可以更有效减少肌肉脂肪

该研究第一作者、美国医师医药责任协会临床研究主任 Hana Kahleová 博士认为,减少肌肉脂肪有助于改善葡萄糖和脂质代谢,因此这一发现对于代谢综合征和2型糖尿病患者尤为重要