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Deltacoronavirus HKU11, HKU13, PDCoV (HKU15) and HKU17 spike pseudoviruses enter avian DF-1 cells via clathrin-mediated endocytosis in a Rab5-, Rab7-and pH-dependent manner

文献类型： 外文期刊

作者： Liang, Qi-Zhang 1 ; Ji, Chun-Miao 2 ; Wang, Bin 2 ; Chen, Wei 1 ; Cong, Feng 3 ; Huang, Yu 1 ; Huang, Yao-Wei 2 ;

作者机构： 1.Fujian Acad Agr Sci, Inst Anim Husb & Vet Med, Fuzhou, Peoples R China

2.South China Agr Univ, Coll Vet Med, Guangdong Lab Lingnan Modern Agr, Guangzhou, Peoples R China

3.Guangdong Lab Anim Monitoring Inst, Guangzhou, Peoples R China

4.South China Agr Univ, State Key Lab Anim Dis Control & Prevent, Guangzhou, Peoples R China

5.Zhejiang Univ, Dept Vet Med, Hangzhou, Peoples R China

关键词： Avian deltacoronavirus; porcine deltacoronavirus; entry pathway; pseudovirus; endocytosis

期刊名称：VETERINARY RESEARCH （ 影响因子：3.5； 五年影响因子：4.0 ）

ISSN： 0928-4249

年卷期： 2025 年 56 卷 1 期

页码：

收录情况： SCI

摘要： Porcine deltacoronavirus (PDCoV), also known as HKU15, is a swine enteropathogenic virus that is believed to have originated in birds. PDCoV belongs to the genus Deltacoronavirus (DCoV), the members of which have mostly been identified in diverse avian species. We recently reported that chicken or porcine aminopeptidase N (APN), the major cellular receptor for PDCoV, can mediate cellular entry via three pseudotyped retroviruses displaying spike proteins from three avian DCoVs (HKU11, HKU13, and HKU17). In the present work, to better understand how avian-origin CoVs may be transmitted to pigs, we investigated the unknown DCoV entry pathway in avian cells. We show that clathrin-mediated endocytosis is involved in the entry of these DCoV pseudoviruses into chicken-origin DF-1 cells. Pseudovirus entry was suppressed by means of pharmacological inhibitors, dominant-negative mutants, and siRNAs targeting various cellular proteins and signalling molecules, suggesting that PDCoV and avian DCoV pseudovirus entry into DF-1 cells depends on clathrin, dynamin-2, cathepsins and a low-pH environment but is independent of caveolae and macropinocytosis. Furthermore, we found that DCoV pseudovirus entry was linked to Rab5- and Rab7-dependent pathways. This is the first report demonstrating that these DCoVs utilize clathrin-mediated endocytosis pathways to enter avian-origin cells, providing new insights into interspecies transmission of DCoVs.

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