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干扰素-λ在缺乏适应性免疫的情况下治疗持续的小鼠诺病毒感染

Timothy J Nice¹, Megan T Baldridge¹, Broc T McCune¹

¹Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.

Science (New York, N.Y.)

|November 29, 2014

概括

干扰素-lambda (IFN-λ) 与其他干扰素不同,有效控制了肠道持续性诺罗病毒感染. 这一发现突出了IFN-λ的存在.

科学领域:

免疫学免疫学免疫学
病毒学病毒学
胃肠病学胃肠病学

背景情况:

诺罗病毒胃肠炎是一个重大的全球公共卫生挑战.
了解限制持续性肠道病毒感染的免疫因素对于公共卫生至关重要.
干扰素在控制肠道诺罗病毒感染中的作用在很大程度上仍未被探索.

研究的目的:

调查不同干扰素细胞因子在控制小鼠诺病毒 (MNoV) 感染中的不同作用.
阐明干扰素-lambda (IFN-λ) 限制持续性肠道MNoV感染的机制.
评估IFN-λ在已确定的胃肠道病毒感染中的治疗潜力.

主要方法:

鼠被感染了MNoV,并评估了IFN-α,IFN-β和IFN-λ在病毒传播和持久性上的系统管理的影响.
评估了MNoV囊蛋白在调节感染依赖的IFN-λ诱导中的作用.
研究了IFN-λ受体 (Ifnlr1) 的非造血细胞表达的要求以及适应性免疫在IFN-λ介导清除中的参与.

主要成果:

虽然IFN-α和IFN-β抑制了全身MNoV的传播,但只有IFN-λ有效控制了持续性肠道感染.
IFN-λ诱导依赖于MNoV囊蛋白,并与减少肠道病毒持久性相关.
在小鼠中,IFN-λ的治疗用药可解决已确定的MNoV感染,独立于适应性免疫,但依赖于非血液细胞中的Ifnlr1表达.

结论:

干扰素-lambda是控制胃肠道内持续性诺罗病毒感染的关键细胞因子.
MNoV囊蛋白调节IFN-λ的产生,影响病毒的持久性.
IFN-λ在治疗已存在的胃肠道病毒感染方面具有显著的治疗潜力,通过非血造细胞起作用.

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