Flesch I E, Kaufmann S H
Department of Immunology, University of Ulm, Federal Republic of Germany.
Infect Immun. 1991 Sep;59(9):3213-8. doi: 10.1128/iai.59.9.3213-3218.1991.
Murine bone marrow-derived macrophages are able to inhibit the growth of Mycobacterium bovis after stimulation with recombinant gamma interferon. This antimycobacterial activity was inhibited by NG-monomethyl-L-arginine, a specific inhibitor of nitrite and nitrate synthesis from L-arginine. Furthermore, there was a complete lack of mycobacterial growth inhibition in a medium deficient in L-arginine. Nitrite is generated by gamma interferon-activated bone marrow-derived macrophages after infection with M. bovis, and a correlation between mycobacterial growth inhibition and nitrite production was observed. These results indicate that reactive nitrogen intermediates derived from L-arginine are crucially involved in macrophage antimycobacterial activity.
用重组γ干扰素刺激后,小鼠骨髓来源的巨噬细胞能够抑制牛分枝杆菌的生长。L-精氨酸合成亚硝酸盐和硝酸盐的特异性抑制剂NG-单甲基-L-精氨酸可抑制这种抗分枝杆菌活性。此外,在缺乏L-精氨酸的培养基中,完全没有分枝杆菌生长抑制现象。γ干扰素激活的骨髓来源巨噬细胞在感染牛分枝杆菌后会产生亚硝酸盐,并且观察到分枝杆菌生长抑制与亚硝酸盐产生之间存在相关性。这些结果表明,源自L-精氨酸的活性氮中间体在巨噬细胞抗分枝杆菌活性中起关键作用。