title: Selective decrease in Leu8-negative T cell subpopulations following treatment with recombinant interferon-alpha 2a (rIFN-alpha 2a).
abstract: The effects of in vivo treatment with recombinant human IFN-alpha 2a (rIFN-alpha 2a) on the distribution of T cell subpopulations were examined in 21 patients with renal cell adenocarcinoma, using two-color flow cytometry with anti-Leu8 in combination with anti-Leu2 and anti-Leu3. Other parameters indicative of immune status, such as the number and percentage of total (CD3) T cells, in vitro proliferation to mitogen, and spontaneous immunoglobulin secretion, were also measured, prior to the initiation of treatment with rIFN-alpha 2a, and during treatment. Total T cell number decreased after treatment with rIFN-alpha 2a, to a low of 54% of mean pretreatment values after 4 weeks. The CD4/CD8 ratio did not change appreciably following treatment with rIFN-alpha 2a. However, the number of Leu8-negative T cells, within both the CD4 and the CD8 T cell populations, decreased more than the number of Leu8-positive T cells. An increase in spontaneous immunoglobulin-secreting cells followed treatment with rIFN-alpha 2a.
mesh_terms: D000911:Antibodies, Monoclonal; D000921:Antibody-Producing Cells / Q000187:drug effects; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis*; D015496:CD4-Positive T-Lymphocytes / Q000187:drug effects; D002292:Carcinoma, Renal Cell / Q000276:immunology / Q000628:therapy; D005434:Flow Cytometry; D006801:Humans; D007167:Immunotherapy; D007370:Interferon Type I / Q000494:pharmacology*; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000494:pharmacology*; D007680:Kidney Neoplasms / Q000276:immunology / Q000628:therapy; D007958:Leukocyte Count / Q000187:drug effects; D011994:Recombinant Proteins; D013601:T-Lymphocytes / Q000145:classification / Q000187:drug effects*
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D007370:Interferon Type I; D000077190:Interferon alpha-2; D016898:Interferon-alpha; D011994:Recombinant Proteins