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Title: Porcine aminopeptidase N mediated polarized infection by porcine epidemic diarrhea virus in target cells

Infection of polarized intestinal epithelial cells by porcine epidemic diarrhea virus (PEDV) was characterized. Indirect immunofluorescence assay, real-time PCR, and transmission electron microscopy confirmed PEDV can be successfully propagated in immortalized swine small intestine epithelial cells (IECs). Infection involved porcine aminpeptidase N (pAPN), a reported cellular receptor for PEDV, transient expression of pAPN and siRNA targeted pAPN increased and decreased the infectivity of PEDV in IECs, respectively. Subsequently, polarized entry into and release from both Vero E6 and IECs was analyzed. PEDV entry into polarized cells and pAPN grown on membrane inserts occurs via apical membrane. The progeny virus released into the medium was also quantified which demonstrated that PEDV is preferentially released from the apical membrane. Collectively, our data demonstrate that pAPN, the cellular receptor for PEDV, mediates polarized PEDV infection. These results imply the possibility that PEDV infection may proceed by lateral spread of virus in intestinal epithelial cells. - Highlights: • PEDV infection of polarized intestinal epithelial cells (IECs) was characterized. • Porcine aminpeptidase N (pAPN) facilitated PEDV infection in IECs. • PEDV entry into and release from polarized cell via its apical membrane. • PEDV infection may proceed by lateral spread of virus in IECs.
Authors:
; ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [3] ;  [6] ; ;  [1]
  1. College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030 (China)
  2. (China)
  3. Institute for Virology, University of Veterinary Medicine, Hannover D-30559 (Germany)
  4. Department of Molecular and Cell Biology, Centro Nacional de Biotecnología (CNB-CSIC), Campus Universidad Autónoma de Madrid, Cantoblanco, Madrid (Spain)
  5. Faculty of Life Sciences, Northeast Agricultural University, Harbin 150030 (China)
  6. College Animal Husbandry and Veterinary Medicine, Shenyang Agricultural University, Shenyang 110161 (China)
Publication Date:
OSTI Identifier:
22470159
Resource Type:
Journal Article
Resource Relation:
Journal Name: Virology; Journal Volume: 478; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; DIARRHEA; INFECTIVITY; MEMBRANES; POLYMERASE CHAIN REACTION; PROGENY; RECEPTORS; SMALL INTESTINE; SWINE; TRANSIENTS; TRANSMISSION ELECTRON MICROSCOPY; VIRUSES