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Human cellular immune response to Giardia lamblia

Zelluläre Immunreaktion gegen Giardia lamblia beim Menschen

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Summary

Human peripheral blood mononuclear cells (PBMC) from two individuals experimentally and one naturally infected withGiardia lamblia responded strongly (in anin vitro lymphocyte proliferation assay) to both heterologous and homologous (parasite origin)G. lamblia antigen stimuli. Proliferative responses to specific antigens as determined by T-cell blotting were due toGiardia T-cell epitopes mostly present in antigens lower than Mr 85,000 and 31,000 in isolates PM and GS/M-H7, respectively. Additionally, Il-2 production of PBMC respective to T lymphocyte subsets under antigen stimulation were determined in one selected patient. Proliferative and lymphokine responses could be associated with CD4+ PBMC depleted of CD8+ T cells and not with PBMC depleted of CD4+ T cells. These preliminary results suggest the initiation of larger studies addressing questions of cell-mediated immune response and the role of lymphokines in human giardiasis.

Zusammenfassung

Periphere Blutmonozyten von zwei Personen mit einer experimentell und einer mit einer natürlich erworbenenGiardia lamblia-Infektion zeigten eine ausgeprägte lymphoproliferative Antwort nachIn-vitro-Stimulation mit Parasitenantigen, das sowohl aus homologen als auch heterologen Parasitenisolaten gewonnen worden war. Eine T-Zell-Blot- Analyse der lymphoproliferativen Immunantwort bezüglich der nach Molekulargewicht aufgetrenntenGiardia-Antigenkomponenten zeigte, daß das Spektrum derGiardia-Antigene mit T-Zell-Epitopen im Mr-Bereich von < 85'000 für das PM-1-Isolat und < 31'000 für das GS/M-H7-Isolat lagen. Bei einem der Patienten wurden Lymphozyten nach antigen-spezifischerIn-vitro-Proliferation auf ihre Lymphozytensubpopulationen und deren Fähigkeit zur Il-2-Produktion untersucht. Eine lymphoproliferative Antwort, verkoppelt mit einer Il-2-Produktion, war nur bei CD4+ Lymphozyten (nach entsprechender Eliminierung von CD8+ Lymphozyten) und nicht bei CD8+ Lymphozyten (nach entsprechender Eliminierung von CD4+ Lymphozyten) nachweisbar.

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Authors and Affiliations

  1. Institut für Parasitologie, Universität Zürich, Winterthurerstr. 266a, CH-8057, Zürich, Switzerland

    B. Gottstein

  2. Laboratory of Parasitic Diseases, NIAID, USA

    T. E. Nash M.D.

  3. Experimental Immunology Branch, NCI, NIH, Bethesda, MD, USA

    Naomi I. Stocks M.D. & G. M. Shearer M.D.

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  1. B. Gottstein
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  2. T. E. Nash M.D.
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  3. Naomi I. Stocks M.D.
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  4. G. M. Shearer M.D.
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Gottstein, B., Nash, T.E., Stocks, N.I. et al. Human cellular immune response to Giardia lamblia. Infection 19, 421–426 (1991). https://doi.org/10.1007/BF01726454

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  • DOI: https://doi.org/10.1007/BF01726454

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