Aspergillus and Fusarium corneal infections are regulated by Th17 cells and IL-17-producing neutrophils.

Aspergillus and Fusarium corneal infections are regulated by Th17 cells and IL-17-producing neutrophils.
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曲霉和镰刀菌感染受Th17细胞和IL-17产生的中性粒细胞的调节。

DOI:
10.4049/jimmunol.1302235
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发表时间:
2014-04-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Pearlman E
Pearlman E
中科院分区:
其他
文献类型:
--
作者:
Taylor PR;Leal SM Jr;Sun Y;Pearlman E

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镰刀菌属和曲霉属霉菌是美国和世界范围内角膜感染的主要原因,导致严重的视力障碍和失明。由于有证据表明T细胞对感染个体中的这些病原性真菌有应答,我们研究了IL-17 A(IL-17)和IFN-γ在真菌性角膜炎小鼠模型中的作用。我们发现,C57 BL/6小鼠角膜感染前,分生孢子的intrichelheal或皮下免疫表现出增强的真菌杀伤和较低的角膜混浊度相比,未免疫的小鼠。保护性免疫与产生IL-17的中性粒细胞、Th17和Th1细胞的临时募集相关,并且依赖于IL-17的产生,而不是IFN-γ。中性粒细胞耗竭和Rag2 −/−小鼠的保护作用也受损。总之,这些研究的结果确定了产生IL-17的中性粒细胞和Th17细胞在调节真菌菌丝生长和角膜疾病严重程度中的重要作用。
Fusarium and Aspergillus species of mould are major causes of corneal infections in the USA and worldwide, resulting in severe visual impairment and blindness. As there is evidence for T cell responses to these pathogenic fungi in infected individuals, we examined the role of IL-17A (IL-17) and IFN-γ in murine models of fungal keratitis. We found that C57BL/6 mice given intratracheal or subcutaneous immunization of conidia prior to corneal infection exhibited enhanced fungal killing and lower corneal opacity compared with unimmunized mice. Protective immunity was associated with temporal recruitment of IL-17 producing neutrophils, Th17 and Th1 cells, and was dependent on production of IL-17 but not IFN-γ. Protection was also impaired in neutrophil depleted and in Rag2−/− mice. Together, the results of these studies identify an essential role for IL-17 producing neutrophils and Th17 cells in regulating the growth of fungal hyphae and the severity of corneal disease.
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