Responsiveness of T lymphocytes from systemic lupus erythematosus to signals provided through CD26 antigen.
To investigate whether the T cell defective capacity to proliferate observed in systemic lupus erythematosus (SLE) T cells is a possible consequence of an intrinsic T cell disorder, the integrity of the accessory activation pathway mediated through CD26 antigen in SLE T cells was studied. Hyporesponsiveness of peripheral blood mononuclear cells (PBMC) from SLE to PHA and CD26 Mab was observed and no differences were found when the responsiveness of highly purified T cells to IL-2, IL-2 plus CD26 Mab, phorbol 12-myristate 13-acetate (PMA), or when PMA plus CD26 Mab was analyzed. Findings suggest that signals induced by triggering CD26 are not intrinsically altered in SLE T cells. However, some alteration of the regulatory involvement of monocytes or B cell over T cell function may be involved.
Plana
M
M
Servei d'Immunologia, Hospital Clínic i Provincial, Barcelona, Spain.
Font
J
J
Viñas
O
O
Martorell
J
J
Ingelmo
M
M
Vives
J
J
D000328:Adult; D000911:Antibodies, Monoclonal / Q000494:pharmacology; D000945:Antigens, Differentiation, T-Lymphocyte / Q000276:immunology / Q000502:physiology*; D018819:Dipeptidyl Peptidase 4; D006801:Humans; D007376:Interleukin-2 / Q000494:pharmacology; D008180:Lupus Erythematosus, Systemic / Q000097:blood / Q000276:immunology / Q000503:physiopathology*; D008213:Lymphocyte Activation / Q000187:drug effects / Q000276:immunology / Q000502:physiology*; D008875:Middle Aged; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology*; D013601:T-Lymphocytes / Q000276:immunology / Q000502:physiology*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D007376:Interleukin-2; D018819:Dipeptidyl Peptidase 4; D013755:Tetradecanoylphorbol Acetate