Endobiont viruses sensed by the human host - beyond conventional antiparasitic therapy.

Endobiont viruses sensed by the human host - beyond conventional antiparasitic therapy.
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DOI:
10.1371/journal.pone.0048418
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Nibert ML
Nibert ML
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Fichorova RN;Lee Y;Yamamoto HS;Takagi Y;Hayes GR;Goodman RP;Chepa-Lotrea X;Buck OR;Murray R;Kula T;Beach DH;Singh BN;Nibert ML

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广泛传播的原生动物寄生虫携带内共生dsRNA病毒,对人类宿主具有未知的影响。其中,阴道毛单胞菌是一种适应人类泌尿生殖道的寄生虫,每年感染全球2.5亿人,使他们更容易患上毁灭性的妊娠并发症(特别是早产)、艾滋病毒感染和HPV相关癌症。虽然一线抗生素治疗(甲硝唑)通常杀死原生动物病原体,但它未能改善生殖结果。我们发现,内共生毛滴虫病毒,在T。迷走神经炎临床分离株,通过Toll样受体3被人上皮细胞感知,触发干扰素调节因子-3、I型干扰素和先前与早产和HIV-1易感性有关的促炎级联反应。甲硝唑治疗放大了这些促炎反应。因此,一个新的范例靶向原生动物病毒沿着原生动物宿主可以防止滴虫病引起的炎症后遗症。
Wide-spread protozoan parasites carry endosymbiotic dsRNA viruses with uncharted implications to the human host. Among them, Trichomonas vaginalis, a parasite adapted to the human genitourinary tract, infects globally ∼250 million each year rendering them more susceptible to devastating pregnancy complications (especially preterm birth), HIV infection and HPV-related cancer. While first-line antibiotic treatment (metronidazole) commonly kills the protozoan pathogen, it fails to improve reproductive outcome. We show that endosymbiotic Trichomonasvirus, highly prevalent in T. vaginalis clinical isolates, is sensed by the human epithelial cells via Toll-like receptor 3, triggering Interferon Regulating Factor -3, interferon type I and proinflammatory cascades previously implicated in preterm birth and HIV-1 susceptibility. Metronidazole treatment amplified these proinflammatory responses. Thus, a new paradigm targeting the protozoan viruses along with the protozoan host may prevent trichomoniasis-attributable inflammatory sequelae.
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