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Functional characterization of canine lymphocyte subsets

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Summary

Functional characterization of subsets of T lymphocytes is essential for transplantation studies in dogs, as it is in other species. We studied the function of T cells separated by two mouse monoclonal antibodies recognizing complementary subsets — an antibody directed to canine T cells (MdT-P1) with an up-regulating function, and an antibody directed to human CD 8 (MT811) that cross-reacts with down-regulating canine T cells. Immunorosetting with sheep red blood cells and Percoll gradient allowed us to study depleted and enriched fractions. Their function was tested in mixed lymphocyte culture (MLC), cell-mediated cytotoxicity (CML), and coculture with B cells in a hemolytic plaque assay (PFC). In MLC, MdT-P1-positive cells showed a high proliferative response, and MT811-positive cells responded poorly to allogeneic cells. Vice versa, MT811-negative cells responded strongly, and MdT-P1-negative cells were poor responders but strong stimulators. Effector cells of CML were separated following 8 days of culture and prior to mixing with target cells. Enriched and depleted fractions with either antibody showed low cytotoxic activity as compared with unseparated cells. When added to unseparated effector cells MT811-positive cells suppressed cytotoxicity. B cells were obtained by resetting with staphylococcal protein A (SPA). Their immunoglobulin production was studied following 6 days of culture stimulated by pokeweed mitogen in a reverse hemolytic plaque assay. Again, MT811-positive cells added to the culture suppressed, and MT811-negative cells enhanced immunoglobulin production. In conclusion, immunorosetting with two monoclonal antibodies allowed us to distinguish subpopulations of canine T cells with up-regulating (helper/inducer) from those with down-regulating (suppressor) activity.

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Authors and Affiliations

  1. Gesellschaft für Strahlen- und Umweltforschung, Institut für Klinische Hämatologie, Marchioninistrasse 25, R401, W-8000, München 70, FRG

    C. Hötzl, H. J. Kolb, E. Holler, M. Schumm & W. Wilmanns

  2. Gesellschaft für Strahlen- und Umweltforschung, Institut für Immunologie, W-8000, München 70, FRG

    H. J. Kolb, J. Hahn, M. Schumm, J. Mysliwietz & S. Thierfelder

  3. Med. Klinik III, Klinikum Grosshadern, Universität München, W-8000, München 70, FRG

    C. Hötzl, H. J. Kolb, E. Holler, M. Schumm, K. Beisser, W. Mempel & W. Wilmanns

  4. Immunologisches Institut der Universität München, W-8000, München 70, FRG

    P. Rieber

Authors
  1. C. Hötzl
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  2. H. J. Kolb
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  3. E. Holler
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  4. J. Hahn
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  5. M. Schumm
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  6. K. Beisser
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  7. J. Mysliwietz
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  8. P. Rieber
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  9. W. Mempel
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  10. W. Wilmanns
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  11. S. Thierfelder
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This work was supported by theWilhelm-Sander-Stiftung

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Hötzl, C., Kolb, H.J., Holler, E. et al. Functional characterization of canine lymphocyte subsets. Ann Hematol 63, 49–53 (1991). https://doi.org/10.1007/BF01714962

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  • DOI: https://doi.org/10.1007/BF01714962

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