[Porcine aminopeptidase N is a functional receptor for the PEDV coronavirus].
Porcine epidemic diarrhea virus (PEDV) causes lethal diarrhea in piglets that leads to great economic losses in East Asia. It was reported that aminopeptidase N (APN) was the receptor for Transmissible gastroenteritis virus (TGEV), Human coronavirus 229E (HCoV-229E) and Feline coronavirus (FeCoV) which all belonged to group I coronavirus including PEDV. It was also confirmed previously that porcine aminopeptidase N (pAPN) could bind to PEDV, and anti-pAPN antibodies could inhibit the combination. To investigate whether pAPN was a receptor for PEDV, we transfected MDCK cells with porcine aminopeptidase (pAPN) cDNA and this enabled non-susceptible cells to support PEDV replication and serial viral propagation. Moreover, the infection was blocked by antibodies against pAPN, implying the critical role of pAPN during virus entry. In addition, immunofluorescence assays for detection of pAPN and PEDV antigens, together with neutralization assays using antibodies against pAPN, further confirmed the correlation between pAPN expression and viral replication in pAPN-transfected MDCK cells. These results indicated that pAPN is a functional receptor for PEDV.
Li
Bao-xian
BX
College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China. libaoxian1983@sina.com
Ma
Guang-peng
GP
Ge
Jun-wei
JW
Li
Yi-jing
YJ
D000818:Animals; D000906:Antibodies / Q000494:pharmacology; D018826:CD13 Antigens / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D002460:Cell Line; D018352:Coronavirus Infections / Q000201:enzymology / Q000378:metabolism; D004285:Dogs; D053485:Porcine epidemic diarrhea virus / Q000201:enzymology*; D013552:Swine
D000906:Antibodies; D018826:CD13 Antigens