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Author:
Kate Kosmac, Bailey D. Peck, R. Grace Walton, Jyothi Mula, Philip A. Kern, Marcas M. Bamman, Richard A. Dennis, Cale A. Jacobs, Christian Lattermann, Darren L. Johnson and Charlotte A. Peterson,
Date:
2018-06-20
[Abstract] Macrophages have well-characterized roles in skeletal muscle repair and regeneration. Relatively little is known regarding the role of resident macrophages in skeletal muscle homeostasis, extracellular matrix remodeling, growth, metabolism and adaptation to various stimuli including exercise and training. Despite speculation into macrophage contributions during these processes, studies characterizing macrophages in non-injured muscle are limited and methods used to identify macrophages vary. A standardized method for the identification of human resident skeletal muscle macrophages will aide in the characterization of these immune cells and allow for the comparison of results across studies. Here, we present an immunohistochemistry (IHC) protocol, validated by flow cytometry, to distinctly ...
[摘要] 巨噬细胞在骨骼肌修复和再生中具有很好的特征。关于驻留巨噬细胞在骨骼肌动态平衡，细胞外基质重塑，生长，代谢和适应各种刺激（包括运动和训练）中的作用知之甚少。尽管在这些过程中推测了巨噬细胞的贡献，但表征非受伤肌肉中的巨噬细胞的研究是有限的，用于鉴定巨噬细胞的方法各不相同。用于鉴定人类骨骼肌巨噬细胞的标准化方法将有助于鉴定这些免疫细胞，并可用于各研究结果的比较。在这里，我们提出免疫组织化学（IHC）协议，通过流式细胞术验证，以清楚地识别常驻人类骨骼肌巨噬细胞种群。我们显示CD11b和CD206双IHC有效识别人骨骼肌中的巨噬细胞。此外，非受伤人骨骼肌中的大多数巨噬细胞表现出“混合”M1 / M2表型，表达CD11b，CD14，CD68，CD86和CD206。在休息的骨骼肌中存在相对较少的CD11b + / CD206-巨噬细胞群。这种人口的相对丰度的变化可能反映了骨骼肌肉环境的重要变化。肌肉中的CD11b和CD206 IHC也显示出巨噬细胞的不同形态学特征，这些特征可能与这些细胞的功能状态有关。
【背景】巨噬细胞是能够适应局部微环境变化的多向性免疫细胞。在过去几年中，研究表明巨噬细胞表型是动态的，存在于连续统一体中（Mosser and Edwards，2008，Italiani and Boraschi，2014，Martinez and ...
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