| Isolation, Culture, and Differentiation of Primary Myoblasts Derived from Muscle Satellite Cells
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Author:
Date:
2020-07-20
[Abstract] The skeletal muscle is key for body mobility and motor performance, but aging and diseases often lead to progressive loss of muscle mass due to wasting or degeneration of muscle cells. Muscle satellite cells (MuSCs) represent a population of tissue stem cells residing in the skeletal muscles and are responsible for homeostatic maintenance and regeneration of skeletal muscles. Growth, injury, and degenerative signals activate MuSCs, which then proliferate (proliferating MuSCs are called myoblasts), differentiate and fuse with existing multinuclear muscle cells (myofibers) to mediate muscle growth and repair. Here, we describe a protocol for isolating MuSCs from skeletal muscles of mice for in vitro analysis. In addition, we provide a detailed protocol on how to culture and ...
[摘要] [摘要] 骨骼肌是身体活动和运动表现的关键，但是衰老和疾病通常会由于肌肉细胞的浪费或变性而导致肌肉质量的逐步丧失。肌卫星细胞（MuSCs）代表的组织STE群体米细胞小号居住在骨骼肌和负责骨骼肌的体内平衡维持和再生。生长，损伤和变性信号激活MuSC，然后增殖（增殖的MuSC被称为成肌细胞），分化并与现有的多核肌肉细胞（肌纤维）融合，以介导肌肉的生长和修复。在这里，我们描述了从小鼠骨骼肌中分离MuSC的体外实验方案分析。此外，我们提供了有关如何将原代成肌细胞培养和分化成肌管的详细协议，以及用于表征细胞的免疫荧光染色程序。这些方法对于在体外模拟再生肌生成以了解MuSC 的动力学，功能和分子调控至关重要。
[背景] 通过多种细胞功能维持肌肉的动态平衡，对于保持肌肉的完整性至关重要。组织特异性成体干细胞能够在整个生命中连续不断地再生局部组织。在成年骨骼肌中，称为肌肉卫星细胞（MuSC）的干细胞群具有强大的再生能力，这是肌肉动态平衡的关键（Yin 等人，2013； Dumont 等人，2016）。静态MuSC位于与肌肉纤维并列的基底层下方的壁iche中，负责肌肉的生长和再生（Yin 等人，2013； Dumont 等人，2016）。
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| Rapid Generation of Human Neuronal Cell Models Enabling Inducible Expression of Proteins-of-interest for Functional Studies
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Author:
Date:
2020-05-05
[Abstract] CRISPR-Cas9 technology has transformed the ability to edit genomic sequences and control gene expression with unprecedented ease and scale. However, precise genomic insertions of coding sequences using this technology remain time-consuming and inefficient because they require introducing adjacent single-strand cuts through Cas9 nickase action and invoking the host-encoded homology-directed repair program through the concomitant introduction of large repair templates. Here, we present a system for the rapid study of any protein-of-interest in two neuronal cell models following its inducible expression from the human AAVS1 safe harbor locus. With lox-flanked foundation cassettes in the AAVS1 site and a tailor-made plasmid for accepting coding sequences-of-interest in ...
[摘要] [摘要] CRISPR-Cas9技术以前所未有的简便性和规模改变了编辑基因组序列和控制基因表达的能力。但是，由于需要引入相邻的单链，因此使用该技术进行精确的基因组编码插入仍然很耗时且效率低下。通过减少Cas9切口酶的作用并通过同时引入大型修复模板来调用宿主编码的同源性指导的修复程序。在此，我们提出了一种系统，用于在其诱导后的两个神经元细胞模型中快速研究任何目的蛋白该系统可从人类AAVS1 安全港基因座表达，在AAVS1 位点具有lox侧翼的基础盒和定制的质粒以接受感兴趣的编码序列，该系统使研究人员能够为诱导型产生自己的神经元细胞模型任何编码表达序列不到一个月的时间。由于可用性Preinserted 增强型绿色的Fluo 可以与目标蛋白质融合的最新蛋白质（EGFP）编码序列，该系统可帮助功能研究通过活细胞显微镜以及利用非常有效的可用性进行的相互作用组分析来跟踪目标蛋白质EGFP捕获矩阵。
[背景] ...
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