Protection against feline immunodeficiency virus using replication defective proviral DNA vaccines with feline interleukin-12 and-18

Dunham, S.P. et al. (2002) Protection against feline immunodeficiency virus using replication defective proviral DNA vaccines with feline interleukin-12 and-18. Vaccine, 20, pp. 1483-1496. (doi: 10.1016/S0264-410X(01)00507-2)

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Abstract

A molecular clone of the Glasgow-8 isolate of FIV (FIVGL8) was rendered replication defective by an in-frame deletion in either reverse transcriptase (ΔRT) or integrase (ΔIN) genes for use as DNA vaccines. To test the ability of these multi-gene vaccines to protect against two feline immunodeficiency virus (FIV) isolates of differing virulence, cats were immunized using either DNA vaccine alone or co-administered with interleukin-12 (IL-12) and/or interleukin-18 (IL-18) cytokine DNA. Animals were challenged sequentially with FIV-Petaluma (FIVPET) an FIV isolate of relatively low virulence and subsequently with the more virulent FIVGL8. A proportion of vaccinates (5/18 ΔIN and 2/12 ΔRT) were protected against primary challenge with FIVPET. Five of the vaccinated-protected cats were re-challenged with FIVPET; four (all ΔIN) remained free of viraemia whilst all naive controls became viraemic. Following subsequent challenge with the more virulent FIVGL8 these four vaccinated-protected animals all became viraemic but showed lower proviral loads than naive cats. This study suggests that while our current DNA vaccines may not produce sterilizing immunity against more virulent isolates of FIV, they may nevertheless significantly reduce the impact of infection.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Dunham, Dr Stephen and Neil, Professor James and Jarrett, Professor James and Golder, Mr Matthew and Flynn, Ms Joanne
Authors: Dunham, S.P., Flynn, J.N., Rigby, M.A., Macdonald, J., Bruce, J., Cannon, C., Golder, M.C., Hanlon, L., Harbour, D.A., Mackay, N.A., Spibey, N., Jarrett, O., and Neil, J.C.
Subjects:Q Science > QR Microbiology > QR355 Virology
College/School:College of Medical Veterinary and Life Sciences
College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
Journal Name:Vaccine
Publisher:Elsevier
ISSN:0264-410X
ISSN (Online):1873-2518

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