[肠道细分细丝细菌与儿童的轮状病毒感染之间的关系分析]
1Gastrointestinal Laboratory, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou 310052, China.
概括
在两岁以下的婴儿中,细分丝状细菌 (SFB) 的殖民化与较低的轮状病毒感染风险有关. 发现一种特定的SFB蛋白,p3340,可以在细胞培养物中中和轮状病毒.
科学领域:
- 微生物学 微生物学
- 病毒学 病毒学
- 儿科 儿科 儿科
背景情况:
- 肠道微生物群在宿主免疫力和感染易感性方面发挥着至关重要的作用.
- 分段丝状细菌 (SFB) 是已知的动物和肠的殖民者,影响免疫发育.
- 罗塔病毒是全球婴儿和幼儿严重腹疾病的主要原因.
研究的目的:
- 调查肠道SFB殖民化与儿童轮状病毒感染风险之间的关联.
- 探索SFB可能对轮状病毒感染产生抵抗力的潜在机制.
主要方法:
- 一项病例控制研究,涉及50名患有轮状病毒肠炎的儿童和55名年龄和性别匹配的对照.
- 实时光定量PCR用于检测便样本中的SFBDNA.
- 在Vero细胞中使用SFB蛋白p3340和轮状病毒进行了中和化试验.
主要成果:
- 与对照组相比,患有轮状病毒肠炎的2岁以下儿童的SFB定居率明显较低 (69%vs89%,P=0.041).
- 在轮状病毒感染和SFB阳性之间观察到强烈的负相关性 (r=-0.87,P<0.001).
- SFB蛋白p3340在Vero细胞中表现出剂量依赖的轮状病毒感染中和 (P=0.001).
结论:
- 婴儿 (<2岁) 中的SFB殖民化与轮状病毒感染风险降低有关.
- SFB功能蛋白p3340对轮状病毒有直接的抗病毒活性.
- 这种SFB介导的抗病毒机制似乎与常见的抗病毒途径不同.
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