Granulocyte-macrophage colony-stimulating factor enhances macrophage accessory function in con A-stimulated T-cell proliferation.
Granulocyte-macrophage colony-stimulating factor (GM-CSF) has been reported to augment various macrophage (M phi) functions, including antigen presentation in the antibody-producing response. We investigated the augmentative effect of GM-CSF on M phi A-cell activity in concanavalin A-stimulated T-cell proliferation. Pretreatment with GM-CSF of peritoneal M phi enhanced the T-cell proliferative response. This effect of GM-CSF was dose dependent and GM-CSF supplementation was needed at the beginning of M phi culture. We observed that GM-CSF induced M phi spreading and firm attachment accompanied with enlargement of the cytoplasm, but could not induce de novo expression of Ia antigen. GM-CSF treatment enabled M phi to produce more interleukin (IL)-1 and IL-6 upon stimulation with lipopolysaccharides or polyinosinic-polycytidylic acid, but was unable to stimulate M phi directly. This was confirmed by Northern blot analysis. These results indicate that GM-CSF augments M phi A-cell activity through the enhancement of the capacity of M phi to produce IL-1 and IL-6.
Kato
T
T
Department of Zoology, Faculty of Science, Kyoto University, Japan.
Inaba
K
K
Ogawa
Y
Y
Inaba
M
M
Kakihara
K
K
Shimizu
S
S
Ikehara
S
S
Sudo
T
T
Muramatsu
S
S
D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology*; D000954:Antigens, Surface / Q000096:biosynthesis; D003208:Concanavalin A / Q000494:pharmacology; D005260:Female; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000502:physiology*; D007106:Immune Sera; D066298:In Vitro Techniques; D007375:Interleukin-1 / Q000096:biosynthesis; D015850:Interleukin-6 / Q000096:biosynthesis; D008070:Lipopolysaccharides / Q000494:pharmacology; D008213:Lymphocyte Activation; D008264:Macrophages / Q000166:cytology / Q000276:immunology*; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D010529:Peritoneal Cavity / Q000166:cytology; D011070:Poly I-C / Q000494:pharmacology; D013601:T-Lymphocytes / Q000276:immunology
D000954:Antigens, Surface; D007106:Immune Sera; D007375:Interleukin-1; D015850:Interleukin-6; D008070:Lipopolysaccharides; D003208:Concanavalin A; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D011070:Poly I-C