title: Accelerated recovery of antigen-presenting cell activity by the administration of interleukin 1 alpha in 5-fluorouracil-treated mice.
abstract: In this study, we investigated the effect of human recombinant interleukin-1 alpha (IL-1 alpha) on antigen-presenting cell (APC) activity of spleen cells in mice treated with 5-fluorouracil (5-FU). APC activity was determined by the antigen-specific proliferation of T cell clone D10.G4.1 cells. When mice were injected with 5-FU, APC activity of spleen cells was suppressed. The administration of IL-1 alpha accelerated the recovery from this suppression. The most accelerated recovery was observed when these mice were administered with IL-1 alpha both before and after the 5-FU treatment. The recovery was also accelerated when the mice were injected with IL-1 alpha after the 5-FU treatment, but not when injected before the 5-FU treatment. The injection of 5-FU also decreased the cell numbers of whole spleen cells, B cells, and non-T non-B cells (Ig- and Thy-1- cells). The administration of IL-1 alpha accelerated the recovery of the decreased cell numbers. Both B cells and non-T non-B cells possessed APC activity, but most APC activity of unseparated spleen cells was carried by non-T non-B cells. B cells possessed only 1/20 of the APC activity of non-T non-B cells. The injection of 5-FU decreased APC activity of both B cells and non-T non-B cells, but the administration of IL-1 alpha accelerated its recovery. Thus, the accelerated recovery of APC activity by IL-1 alpha was suggested to be due to the recovery in the numbers of APC activity-bearing cell subpopulations and also due to the recovery of the APC activity of each subpopulation. Possible mechanisms for the recovery were discussed.
authors.affiliation: Department of Immunology, Dainippon Pharmaceutical Co., Ltd., Enoki, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nakano
authors.forename: H
authors.initials: H
authors.lastname: Hayashi
authors.forename: K
authors.initials: K
authors.lastname: Okugawa
authors.forename: H
authors.initials: H
authors.lastname: Furuichi
authors.forename: M
authors.initials: M
authors.lastname: Ido
authors.forename: Y
authors.initials: Y
authors.lastname: Sohmura
mesh_terms: D000818:Animals; D000938:Antigen-Presenting Cells / Q000187:drug effects* / Q000502:physiology; D001402:B-Lymphocytes / Q000187:drug effects; D005260:Female; D005472:Fluorouracil / Q000494:pharmacology*; D007375:Interleukin-1 / Q000494:pharmacology*; D051379:Mice; D008809:Mice, Inbred C3H
chemical_list: D007375:Interleukin-1; D005472:Fluorouracil