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Journal of Virology, January 2006, p. 689-696, Vol. 80, No. 2
0022-538X/06/$08.00+0     doi:10.1128/JVI.80.2.689-696.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Defining the Cellular Target(s) of Porcine Reproductive and Respiratory Syndrome Virus Blocking Monoclonal Antibody 7G10

Jeong-Ki Kim,1 Al-Majhdi Fahad,1 Kumar Shanmukhappa,2 and Sanjay Kapil1*

Louise C. Averill Research Laboratory, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas 66506,1 Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 422292

Received 15 June 2005/ Accepted 21 October 2005

We produced a monoclonal antibody (MAb) (7G10) that has blocking activity against porcine reproductive and respiratory syndrome virus (PRRSV). In this study, we identified the components of the 7G10 MAb-bound complex as cytoskeletal filaments: vimentin, cytokeratin 8, cytokeratin 18, actin, and hair type II basic keratin. Vimentin bound to PRRSV nucleocapsid protein and anti-vimentin antibodies showed PRRSV-blocking activity. Vimentin was expressed on the surface of MARC-145, a PRRSV-susceptible cell line. Simian vimentin rendered BHK-21 and CRFK, nonsusceptible cell lines, susceptible to PRRSV infection. These results suggest that vimentin is part of the PRRSV receptor complex and that it plays an important role in PRRSV binding with the other cytoskeletal filaments that mediate transportation of the virus in the cytosol.


* Corresponding author. Mailing address: Louise C. Averill Research Laboratory, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506. Phone: (785) 532-4457. Fax: (785) 532-4829. E-mail: kapil{at}vet.ksu.edu.


Journal of Virology, January 2006, p. 689-696, Vol. 80, No. 2
0022-538X/06/$08.00+0     doi:10.1128/JVI.80.2.689-696.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.




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