与慢性阻塞性肺病中异常的肌纤维比例相关的不同表达的肌纤维转录
Joe W Chiles1, Ava C Wilson1,2, Rachel Tindal3
1Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
慢性阻塞性肺病 (COPD) 中的骨肌肉功能障碍涉及异常的肌肉纤维比例. 这项研究确定了与这种表型相关的特定基因表达模式,为COPD提供了洞察力.
科学领域:
- 肺部医学 肺部医学
- 骨肌肉生理学 骨肌肉生理学
- 分子生物学分子生物学
背景情况:
- 骨肌肉功能障碍是慢性阻塞性肺病 (COPD) 的常见肺外表现.
- 之前的研究将改变的肌重链表达与COPD严重程度联系起来,主要是在男性队列中.
- 这项研究旨在确定两性异常肌纤维比例,并确定COPD中相关的转录性变化.
研究的目的:
- 在男性和女性患有COPD中定义异常的肌纤维比例表型.
- 确定与COPD患者异常肌纤维比例相关的特定转录和转录网络.
- 研究COPD中肌纤维比例,临床特征和基因表达之间的关系.
主要方法:
- 评估了46名COPD参与者的身体组成,力量,耐力和肺功能.
- 通过免疫光和RNA测序分析了大量的横向肌肉活组织,以检测纤维类型的分布和基因表达.
- 使用性别分层的k-means集群来定义异常的肌纤维比例和与这种表型相关的转录/网络.
主要成果:
- 确定了男性和女性COPD异常肌纤维比例标准;一半的参与者符合这些标准.
- 肌纤维比例异常的参与者表现出较低的握力,6分钟的步行距离和FEV1/FVC比率.
- 确定了与异常肌纤维比例相关的29个转录,包括NEB,TPM1和TPM2;确定了与肌肉缩和骨矿物密度位点相关的两个共同表达模块.
结论:
- 显著的转录性改变与COPD患者的肌纤维比例异常有关.
- 与异常肌纤维比例相关的共同表达网络被丰富为I型和IIa型纤维的转录.
- 研究结果表明,在COPD相关的骨肌肉功能障碍中,多种肌肉纤维类型的转录调节发生了变化.
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