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首页> 外文期刊>The American Journal of Tropical Medicine and Hygiene >Higher percentages of circulating mast cell precursors correlate with susceptibility to reinfection with Schistosoma mansoni.
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Higher percentages of circulating mast cell precursors correlate with susceptibility to reinfection with Schistosoma mansoni.

机译:循环肥大细胞前体的百分比较高与曼氏血吸虫再感染的敏感性有关。

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摘要

A high level of serum IgE is generally associated with human resistance to schistosomes, though the protective mechanisms of IgE remain undefined. We recently reported that whereas some individuals who are occupationally hyperexposed to Schistosoma mansoni display resistance to reinfection, others remain highly susceptible, in some cases due to HIV-1 co-infection. As IgE functions, in part, through FcepsilonRI on mast cells, we characterized circulating CD117(+) FcepsilonRI(+) mast cell precursors in this population. Surprisingly, a higher percentage of CD117(+) cells correlated with a susceptible phenotype in HIV-1 seronegative participants with schistosomiasis. There was no association between percentages of peripheral CD117(+) cells and susceptibility to reinfection in persons with HIV-1. Serum levels of polyclonal IgE were inversely correlated with percentages of CD117(+) cells regardless of HIV-1 status. Thus, immature mast cells may affect IgE availability, or IgE may affect immature mast cells, altering the balance of host susceptibility and resistance to schistosomes.
机译:高水平的血清IgE通常与人类对血吸虫的抵抗力有关,尽管IgE的保护机制尚不清楚。我们最近报道说,尽管有些人职业性地暴露于曼氏血吸虫病后表现出对再感染的抵抗力,但另一些人仍然高度易感,在某些情况下是由于HIV-1共同感染​​。由于IgE的功能部分是通过肥大细胞上的FcepsilonRI,我们表征了该群体中循环CD117(+)FcepsilonRI(+)肥大细胞的前体。令人惊讶的是,在血吸虫病的HIV-1血清阴性参与者中,较高百分比的CD117(+)细胞与易感表型相关。周围的CD117(+)细胞百分比与HIV-1感染者对再感染的敏感性之间没有关联。血清多克隆IgE水平与CD117(+)细胞百分比呈负相关,而与HIV-1状态无关。因此,未成熟的肥大细胞可能会影响IgE的可用性,或者IgE可能会影响未成熟的肥大细胞,从而改变宿主易感性和对血吸虫的抵抗力之间的平衡。

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