一种Trypanosoma brucei诱导的心肌炎和心脏功能障碍的小鼠模型
Nathan P Crilly1,2, Marcelle Dina Zita3, Alexander K Beaver1,2
1Department of Molecular and Comparative Pathobiology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.
bioRxiv : the preprint server for biology
|October 24, 2023
概括
研究人员开发了一种新的小鼠模型,用于Trypanosoma brucei相关的心肌病. 这种模型模仿了人类的心脏症状,有助于研究免疫媒介心脏损伤和潜在的治疗非洲试索米亚症.
科学领域:
- 寄生虫学的寄生虫学
- 心脏病学 心脏病学
- 免疫学 免疫学 免疫学
背景情况:
- trypanosoma brucei 致使非洲三生菌病 (HAT 和 AAT),往往导致心脏并发症.
- 现有的研究表明,感染宿主的心脏内寄生虫和心肌炎,但缺乏T. brucei相关心肌病的可复制的小鼠模型.
- 在撒哈拉以南的非洲,非洲试虫病具有显著的社会经济影响.
研究的目的:
- 建立第一个临床相关和可重复的小鼠模型,用于慢性T. brucei感染中的心脏功能障碍.
- 为了研究T. brucei介导的心脏损伤的发病原因.
- 支持对T. brucei相关心脏病的治疗策略的开发.
主要方法:
- 在小鼠中开发了一种慢性T. brucei感染模型.
- 组织学检查心肌炎.
- 对血清NT-proBNP水平的测量.
- 电心图分析. 电心图分析.
- 流细胞计分析心肌免疫细胞群.
主要成果:
- 小鼠模型显示了肌心炎的组织学证据和血清NT-proBNP的升高,反映了人类的心脏症状.
- 在受感染的小鼠中观察到心电图异常.
- 较高的NT-proBNP水平在严重的心室功能障碍之前.
- 心肌炎与心肌免疫细胞增加有关,包括T细胞和巨细胞,这表明免疫介导的损伤.
结论:
- 已经成功地建立了一个新的和可重复的T. brucei相关心肌病的小鼠模型.
- 这个模型准确地反映了人类心脏病理和感染期间的免疫反应.
- 该模型是研究T. brucei引起的心脏损伤和开发新治疗方法的宝贵工具.
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