多态核白细胞 (PMN) 使用不同的,取决于菌株的机制来杀死寄生虫Trichomonas vaginalis
Frances Mercer1,2, Sandip Kumar Mukherjee2, Chi-Lee Ho2
1Department of Biological Sciences, California State Polytechnic University Pomona, Pomona, California, USA.
mBio
|June 26, 2025
概括
多态核白细胞 (PMNs) 通过细胞和NETosis杀死阴道 (Trichomonas vaginalis (Tv)). 一些TV菌株通过增强的膜修复抵抗快速的细胞杀死,但随后被NETosis杀死,揭示了菌株特定的免疫逃避.
科学领域:
- 免疫学 免疫学 免疫学
- 寄生虫学的寄生虫学
- 细胞生物学 细胞生物学
背景情况:
- 阴道 (Trichomonas vaginalis (Tv)) 引起三,这是一个常见的性传播感染,症状变化不定.
- 多态核白细胞 (PMNs) 是已知的杀死病原体的免疫细胞.
- 之前的研究表明,PMN通过细胞分裂杀死TV,但杀死菌株特异性的差异尚未被探索.
研究的目的:
- 为了调查PMN介导的Trichomonas vaginalis的杀死中菌株依赖的差异.
- 确定对PMN杀伤的TV抗性的机制,重点关注细胞和NETosis.
- 了解TV膜修复如何影响免疫细胞攻击的易感性.
主要方法:
- 研究了人类PMN杀死四种不同的Trichomonas vaginalis菌株.
- 评估了对PMN巨细胞形成的敏感性,并测量了寄生虫血再密封能力.
- 通过使用DNase灵敏度作为指标的中性粒细胞外细胞陷 (NETosis) 进行杀死调查.
主要成果:
- 在四个Tv菌株中,有两种被PMN细胞结核迅速杀死;另外两种是耐药的.
- 抗细胞分裂的菌株表现出增强的血膜再密封能力.
- 耐药菌株容易受到NETosis的感染,这种杀死机制对对Trogocytosis敏感菌株的有效性较低.
结论:
- 对于Trichomonas vaginalis,PMN采用多种杀死机制,包括细胞和NETosis.
- 阴道菌株Trichomonas vaginalis对PMN杀死具有差异性耐药性,主要是由膜修复驱动的.
- 菌株特异性免疫逃避策略,涉及膜修复和对NETosis的差异性敏感性,影响TV的病变发生.
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