Inflammatory bactericidal lectin RegIIIβ: Friend or foe for the host?

Inflammatory bactericidal lectin RegIIIβ: Friend or foe for the host?
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DOI:
10.1080/19490976.2017.1387344
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发表时间:
2018-03-04
期刊:
影响因子:
12.2
通讯作者:
Hardt WD
Hardt WD
中科院分区:
医学2区
文献类型:
--
作者:
Miki T;Okada N;Hardt WD

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在发炎的肠道中,肠粘膜大量产生杀菌凝集素RegIIIβ。 RegIIIβ分别结合肽聚糖和脂质A,因此可以杀死某些革兰氏阳性和革兰氏阴性细菌,包括肠道共生微生物群和肠道致病菌。考虑到表达模式和杀菌活性,RegIIIβ被认为是防止肠道致病菌感染的宿主防御因子。然而,人们对RegIIIβ如何识别目标细菌并杀死它们,以及RegIIIβ如何在感染性腹泻中发挥作用知之甚少。因此,我们最近的研究重点是RegIIIβ靶标识别、杀灭革兰氏阴性菌以及RegIIIβ对鼠伤寒沙门氏菌引起的感染性腹泻的宿主保护功能。在这里,我们讨论了 RegIIIβ 在感染性腹泻中的保护作用的新见解,并提出了针对沙门氏菌腹泻的新治疗干预措施的途径。
In the inflamed gut, the bactericidal lectin RegIIIβ is massively produced by intestinal mucosa. RegIIIβ binds peptidoglycan and lipid A respectively, and thus can kill certain Gram-positive and Gram-negative bacteria, including the gut commensal microbiota and enteropathogenic bacteria. Considering the expression pattern and bactericidal activity, RegIIIβ is believed to be a host defense factor for protecting against the infection with enteropathogenic bacteria. However, it was poorly understood how RegIIIβ recognizes the target bacteria and kill them, and how RegIIIβ plays role(s) in infectious diarrhea. Therefore, our recent study has focused on RegIIIβ-target recognition, killing of Gram-negative bacteria, and host protective functions of RegIIIβ for infectious diarrhea inflicted by Salmonella Typhimurium. Here, we discuss novel insights into the protective role of RegIIIβ in infectious diarrhea, and propose avenues towards novel therapeutic interventions for Salmonella diarrhea.
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