Search Results
You are looking at 1 - 2 of 2 items for
- Author or Editor: Catherine Charreyre x
- Refine by Access: Content accessible to me x
Summary
Fifteen specific-pathogen-free cats were experimentally infected with FeLV; 8 cats recovered after transient or nondetectable viremia, and 7 cats became persistently viremic. Four additional cats served as noninfected controls. Antibodies to whole FeLV (elisa and immunoblot [western] analysis), antibodies to fixed FeLV-infected cells, and virus-neutralizing antibodies were monitored for as long as 3 years after infection. As a group, cats that recovered after acute infection developed higher titer of these various antibodies than did cats that became persistently viremic. However, specific combination or titer of antibodies was not always found in recovered cats or in persistently viremic cats. Six cats that had recovered from acute FeLV infection nearly 3 years earlier were reinfected with the same virus. Three of the cats appeared to be resistant to reinfection, 2 cats became transiently viremic, and 1 cat became persistently viremic. Slight and transient anamnestic elisa-detectable antibody response to whole virus was seen after reinfection; immunofluoresence- and western blot-detectable responses were not greatly enhanced. Five FeLV-recovered cats were monitored for 2 years; FeLV infection spontaneously recurred in 1 cat.
Abstract
Objective—To characterize the kinetics of interleukin (IL)-4, IL-5, and IL-13 secretion in peripheral blood and lymph node mononuclear cells isolated from porcine circovirus type 2 (PCV2)–vaccinated pigs after cells were challenged with PCV2 open reading frame 2 antigen.
Animals—10 pigs.
Procedures—5 pigs were vaccinated with a PCV2 vaccine and received a booster dose 3 weeks later. They were kept together with a similar group of 5 nonvaccinated pigs that served as controls. One week after the second vaccination, peripheral blood mononuclear cells (PBMCs) and excised retropharyngeal lymph node mononuclear cells (LNMCs) were isolated and cultured. Cells were then challenged by exposure to PCV2 open reading frame 2 and evaluated at 2, 12, 24, and 48 hours to determine the expression of IL-4, IL-5, and IL-13 via quantitative PCR assay. Changes in gene expression were analyzed relative to the results from analysis of the sample at 0 hours (calibrator).
Results—All ILs were upregulated differently in LNMCs and PBMCs from vaccinated pigs. Lymph node mononuclear cells from vaccinated animals produced significantly more IL-4 mRNA than did PBMCs at 2, 12, and 48 hours (relative change: 2.8 vs −3.6, 13.0 vs 3.6, and 9.8 vs 1.8, respectively) and more IL-5 mRNA at 2, 12, 24, and 48 hours (relative change: 1. 2 vs −4.8, 2.2 vs 0.2, 3.2 vs −1.9, and 4.0 vs −3.6, respectively). Interleukin-13 mRNA reached its highest concentration at 24 hours but was 11.9-fold higher in PBMCs than in LNMCs.
Conclusions and Clinical Relevance—Results supported the importance of IL-4, IL-5, and IL-13 in pigs, suggesting that PBMCs and LNMCs express cytokines in a tissue-specific manner.
