Journal article
Depletion of CD4 T lymphocytes at the time of infection with M. avium subsp. paratuberculosis does not accelerate disease progression
Veterinary immunology and immunopathology, Vol.149(3-4), pp.286-291
10/15/2012
Handle:
https://hdl.handle.net/2376/104915
PMID: 22898538
Abstract
A calf model was used to determine if the depletion of CD4 T cells prior to inoculation of Mycobacterium avium subsp. paratuberculosis (Map) would delay development of an immune response to Map and accelerate disease progression. Ileal cannulas were surgically implanted in 5 bull calves at 2 months of age. Two calves were depleted of CD4 T cells by intravenous injection of anti-bovine CD4 antibody administered 24h prior to inoculation with Map. The two CD4-depleted calves and one non-depleted calf were inoculated via ileal cannula with 1×108cfu live Map every 3 days for a total of 4 inoculations. Two additional calves served as non-depleted and uninfected controls. Injection with the anti-CD4 mAb reduced the frequency of CD4 T cells from a pre-depletion average of 15% to less than 1% in PBMC at 24h. However, a consistent proliferative response dominated by CD4 T cells, developed in both treated and untreated calves over the course of the 6-month study period. Recovery of Map from serial biopsies obtained from the CD4-depleted and non-depleted calves after Map infection did not differ. In addition, CD4 depletion did not increase the level of Map shed in the feces over the non-depleted animal.
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Details
- Title
- Depletion of CD4 T lymphocytes at the time of infection with M. avium subsp. paratuberculosis does not accelerate disease progression
- Creators
- A.J Allen - Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA, United StatesJ.R Stabel - USDA-ARS, National Animal Disease Center, Ames, IA, United StatesS Robbe-Austerman - USDA-APHIS, National Veterinary Services Laboratory, Ames, IA, United StatesK.T Park - Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United StatesM.V Palmer - USDA-ARS, National Animal Disease Center, Ames, IA, United StatesG.M Barrington - Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA, United StatesK.K Lahmers - Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United StatesMary Jo Hamilton - Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United StatesWilliam C Davis - Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United States
- Publication Details
- Veterinary immunology and immunopathology, Vol.149(3-4), pp.286-291
- Academic Unit
- Veterinary Clinical Sciences, Department of; Veterinary Microbiology and Pathology, Department of
- Publisher
- Elsevier B.V
- Identifiers
- 99900546768701842
- Language
- English
- Resource Type
- Journal article