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Polyclonal B-cell stimulation by L3T4+ T cells in experimental leishmaniasis
M Lohoff1, C Matzner, M Röllinghoff
1Institut für Klinische Mikrobiologie, Universität Erlangen-Nürnberg, Federal Republic of Germany.
Infection and Immunity
|August 1, 1988
Summary
T cells are essential for the polyclonal B-cell stimulation observed in mice infected with Leishmania major. Specific T cells directly trigger B cells, leading to proliferation and immunoglobulin production, confirming T-cell dependency.
Area of Science:
- Immunology
- Infectious Diseases
- Parasitology
Background:
- Leishmania major infection in mice causes polyclonal B-cell stimulation in lymphoid organs.
- This stimulation has been hypothesized to be T-cell dependent.
Purpose of the Study:
- To provide experimental evidence for the role of T cells in Leishmania major-induced polyclonal B-cell stimulation.
Main Methods:
- Utilized BALB/c-derived, L3T4-positive T cells specific for Leishmania major.
- Co-cultured these T cells with syngeneic B cells.
Main Results:
- Demonstrated that Leishmania major-specific T cells induce polyclonal proliferation in syngeneic B cells.
- Observed immunoglobulin production by the stimulated B cells.
Conclusions:
- Confirmed that T cells are crucial for the polyclonal B-cell response during Leishmania major infection.
- Showcased the direct inductive capacity of specific T cells on B-cell activation and antibody production.