title: Adjuvant activity of 6-O-mycoloyl-N-acetylmuramuyl-L-alanyl-D-isoglutamine.
abstract: Immunological properties of synthetic 6-O-mycoloyl-N-acetylmuramyl-L-alanyl-D-isoglutamine (6-O-mycoloyl-N-acetylmuramyldipeptide) and 6-O-mycoloyl-N-acetylmuramic acid were examined in guinea pigs and mice in comparison with those of BCG cell-wall skeleton, N-acetylmuramyl-L-alanyl-D-isoglutamine, and 6-O-stearoyl-N-acetylmuramyl-L-alanyl-D-isoglutamine. 6-O-Mycoloyl-N-acetylmuramyldipeptide showed a potent adjuvant activity for the induction of delayed type hypersensitivy to N-acetyl-L-tyrosine-3-azobenzene-4'-arsonic acid (ABA-N-acetyltyrosine). It was also found that 6-O-mycoloyl-N-acetylmuramyldipeptide treated with oil droplets or suspended in phosphate-buffered saline was as effective as oil-attached BCG cell-wall skeleton for the generation of cell-mediated cytotoxic effector cells to mastocytoma P815-X2 cells in the spleen of C57BL/6J mice in vivo. However, 6-O-mycoloyl-N-acetyl-muramyldipeptide was less active as adjuvant than BCG cell-wall skeleton and N-acetylmuramyldipeptide in enhancing the circulating antibody formation to T-independent antigen, 2,4-dinitrophenyl-lysyl (DNP-Lys)-Ficoll in vivo, and on the generation of helper function of carrier-primed T-cells, and was inactive as a mitogen on normal mouse spleen cells. On the other hand, although 6-O-mycoloyl-N-acetylmuramic acid was shown to be inactive as adjuvant on immune systems described above, it was active as a mitogen on normal mouse spleen cells.
mesh_terms: D000276:Adjuvants, Immunologic; D000818:Animals; D000917:Antibody Formation; D001500:BCG Vaccine; D002473:Cell Wall / Q000276:immunology; D006224:Cricetinae; D004912:Erythrocytes / Q000276:immunology; D005260:Female; D006968:Hypersensitivity, Delayed / Q000276:immunology; D012515:Mast-Cell Sarcoma / Q000276:immunology; D051379:Mice; D008938:Mitosis / Q000187:drug effects; D009163:Mycobacterium bovis / Q000276:immunology; D009171:Mycolic Acids / Q000138:chemical synthesis / Q000276:immunology*; D010457:Peptidoglycan / Q000138:chemical synthesis / Q000276:immunology*; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology; D013936:Thymidine / Q000378:metabolism
chemical_list: D000276:Adjuvants, Immunologic; D001500:BCG Vaccine; D009171:Mycolic Acids; D010457:Peptidoglycan; D013936:Thymidine