Investigating the impact of helminth products on immune responsiveness using a TCR transgenic adoptive transfer system

Boitelle, A., Scales, H. E. , Di Lorenzo, C., Devaney, E. , Kennedy, M. W. , Garside, P. and Lawrence, C. E. (2003) Investigating the impact of helminth products on immune responsiveness using a TCR transgenic adoptive transfer system. Journal of Immunology, 171(1), pp. 447-454. (doi: 10.4049/jimmunol.171.1.447) (PMID:12817029)

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Helminth infections and their products have a potent immunomodulatory effect on the host immune system and can impair immune responses against unrelated Ags. In vitro studies have suggested that the immunomodulation by helminth extracts may be the result of bystander response bias toward a Th2 phenotype and/or an Ag-specific T lymphocyte proliferative hyporesponsiveness. The aim of this study was to determine the role of these potential mechanisms of immunosuppression in vivo. Therefore, using a sensitive model of CFSE-labeled OVA-specific TCR transgenic T lymphocyte adoptive transfer, we analyzed the effect of Ascaris suum body fluid (ABF) on the kinetics and amplitude of a primary OVA-specific T cell response as well as the Th1/Th2 profile of the response in wild-type and IL-4 knockout (KO) mice. We find that inhibition of delayed-type hypersensitivity by ABF was associated with a Th1/Th2 shift in wild-type animals, but not in IL-4 KO mice. The use of this model has allowed us to demonstrate that although the kinetics of the OVA-specific primary response was not affected by ABF, the expansion of the OVA-specific T lymphocytes was significantly inhibited in both wild-type and IL-4 KO mice. This inhibition was associated with a reduced proliferative capacity of these cells in vivo, distinct from anergy.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Kennedy, Professor Malcolm and Devaney, Professor Eileen and Di Lorenzo, Miss Caterina and Garside, Professor Paul and Scales, Dr Hannah
Authors: Boitelle, A., Scales, H. E., Di Lorenzo, C., Devaney, E., Kennedy, M. W., Garside, P., and Lawrence, C. E.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
College of Medical Veterinary and Life Sciences > School of Life Sciences
Journal Name:Journal of Immunology
Publisher:American Association of Immunologists
ISSN (Online):1550-6606
Published Online:01 July 2003

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