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Antiviral activity of selected cathelicidins against infectious bronchitis virus
Peptide Science ( IF 1.5 ) Pub Date : 2021-05-31 , DOI: 10.1002/pep2.24234
M. Hélène Verheije 1 , Maarten Coorens 2 , Erik A. W. S. Weerts 1 , Alinda J. Berends 1 , Roel M. Harten 2 , Marloes Angel 2 , Jannetje Kooij 2 , Soledad R. Ordonez 2 , Steven J. Beurden 1 , Albert Dijk 2 , Henk P. Haagsman 2 , Edwin J. A. Veldhuizen 3
Affiliation  

Avian infectious bronchitis (IB) is a highly contagious disease caused by infectious bronchitis virus (IBV), a coronavirus of domestic fowl. IB is a major concern in the poultry industry, causing worldwide economic losses through decreased egg production and quality and by increasing the chicken's susceptibility for secondary bacterial infections, particularly Escherichia coli. In this study, the anti-IBV activity of cathelicidins, small antimicrobial peptides of the innate immune system was investigated. The cell culture adapted (nonvirulent) IBV strain Beaudette was effectively inhibited by the human cathelicidin LL-37 in bovine hamster kidney-21 cells at nontoxic concentrations. The peptide needed to be present during virus inoculation to effectively inhibit the infection of IBV-Beaudette, indicating that LL-37 likely bound viral particles. However, no clear morphological changes in the IBV virion upon binding were observed by electron microscopy. In this cell culture model, chicken cathelicidins (CATH1-3) were inactive against IBV-Beaudette. In contrast, in multicellular infection models using the virulent IBV-M41 strain the activities of human and chicken cathelicidins were different. In particular, upon inoculation of 10-day-old embryonic eggs with IBV-M41, CATH-2 reduced the viral load to a higher extend than LL-37. Similarly, viral infection of chicken tracheal organ cultures with IBV-M41 was significantly reduced in the presence of CATH-2 but not LL-37. These results indicate a potential antiviral role for CATH-2 upon IBV infection in vivo.

中文翻译:

所选导管素对传染性支气管炎病毒的抗病毒活性

禽传染性支气管炎(IB)是由家禽冠状病毒传染性支气管炎病毒(IBV)引起的一种高度传染性疾病。IB 是家禽业的一个主要问题,它通过降低产蛋量和质量以及增加鸡对继发性细菌感染,特别是大肠杆菌的易感性而造成全球经济损失. 在这项研究中,研究了先天免疫系统的小抗菌肽 cathelicidins 的抗 IBV 活性。细胞培养适应(非毒性)IBV 菌株 Beaudette 在无毒浓度下被牛仓鼠肾 21 细胞中的人导管素 LL-37 有效抑制。在病毒接种期间需要存在该肽以有效抑制 IBV-Beaudette 的感染,这表明 LL-37 可能结合病毒颗粒。然而,通过电子显微镜观察到结合后 IBV 病毒粒子没有明显的形态变化。在该细胞培养模型中,鸡导管素 (CATH1-3) 对 IBV-Beaudette 无活性。相比之下,在使用毒性 IBV-M41 菌株的多细胞感染模型中,人和鸡导管素的活性是不同的。特别是,在用 IBV-M41 接种 10 天大的胚胎卵子后,CATH-2 将病毒载量降低到比 LL-37 更高的程度。同样,在存在 CATH-2 而不是 LL-37 的情况下,IBV-M41 对鸡气管器官培养物的病毒感染显着减少。这些结果表明 CATH-2 在 IBV 感染后具有潜在的抗病毒作用在体内
更新日期:2021-05-31
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