损伤大小对局部和全身免疫细胞动态在体积肌肉损失中的影响
Ricardo Whitaker1, Samuel Sung1, Tina Tylek1
1School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, PA.
bioRxiv : the preprint server for biology
|September 10, 2024
概括
巨细胞功能障碍有助于纤维化肌肉损失. 仅仅针对中性粒细胞并没有改善肌肉修复,这凸显了需要考虑整个免疫系统才能获得更好的结果.
科学领域:
- 免疫学 免疫学 免疫学
- 再生医学是一种再生医学.
- 骨肌肉生物学 骨肌肉生物学
背景情况:
- 体积肌肉损失 (VML) 可以导致再生或纤维化.
- 巨细胞的表型和功能对于确定VML结果至关重要.
- 系统性炎症和白细胞透在组织修复中起作用.
研究的目的:
- 在老鼠中研究巨细胞表型和白细胞动态在再生性与纤维性VML中.
- 分析系统性炎症和免疫细胞在肌肉,脏和骨髓中的分布.
- 为了确定中性粒细胞丰度和枯竭对VML结局的影响.
主要方法:
- 在小鼠VML模型中对巨细胞表型的基于系统的分析.
- 量化肌肉,脏和骨髓中的白细胞种群.
- 测量促炎性标记物和细胞因子.
- 试验中性粒细胞的耗尽,以评估它们在VML中的作用.
主要成果:
- 巨细胞功能障碍在早期 (第1天) 显而易见,并且在纤维性VML中持续存在.
- 纤维结局结果显示肌肉和骨髓中的白细胞增加,脏巨细胞形状发生变化.
- 肌肉中性粒细胞在第一天的纤维性VML中显著更多,但它们的耗尽并没有改变巨细胞表型或肌肉修复.
- 系统性炎症标志物和促炎性细胞因子在纤维性VML中发生变化.
结论:
- 巨细胞功能障碍是纤维化VML的早期特征.
- 中性粒细胞在早期纤维性损伤中很丰富,但并不是不良结果的主要驱动因素.
- 改善肌肉修复需要采用整体方法,考虑到免疫细胞和全身炎症的复杂相互作用.
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