PMID- 2352496 OWN - NLM STAT- MEDLINE DCOM- 19900716 LR - 20190820 IS - 0385-5600 (Print) IS - 0385-5600 (Linking) VI - 34 IP - 3 DP - 1990 TI - Enhancement of cytotoxicity of active macrophages by mycoplasma: role of mycoplasma-associated induction of tumor necrosis factor-alpha (TNF-alpha) in macrophages. PG - 231-43 AB - Tumor necrosis factor-alpha (TNF-alpha)-inducing activity of several mycoplasmas including Mycoplasma pneumoniae, a causative agent in human respiratory infectious diseases, was investigated. Purified peritoneal macrophages from BALB/c mice markedly enhanced their cytotoxic activity to Meth A cells, when cultured with either viable or non-viable mycoplasmas. The supernatants of the macrophage culture with mycoplasmas, M. pneumoniae and Acholeplasma laidlawii, showed the potent cytotoxic activity to TNF-alpha-sensitive L cells but not to TNF-alpha-insensitive L cells. Addition of anti-TNF-alpha antiserum inhibited completely the cytotoxic activity of these supernatants, indicating that a major part of the cytotoxic activity might be due to TNF-alpha. Various other mycoplasmas, either glucose- or arginine-utilizing species, as far as tested showed also the potent activity to produce TNF-alpha. These results strongly suggest the possibility that mycoplasmas possess the activity of TNF-alpha induction which might be responsible for a part of enhancement of cytotoxic activity of macrophages and resistance to infection with mycoplasmas in vivo. FAU - Arai, S AU - Arai S AD - Department of Microbiology, Kurume University, School of Medicine, Fukuoka. FAU - Furukawa, M AU - Furukawa M FAU - Munakata, T AU - Munakata T FAU - Kuwano, K AU - Kuwano K FAU - Inoue, H AU - Inoue H FAU - Miyazaki, T AU - Miyazaki T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Australia TA - Microbiol Immunol JT - Microbiology and immunology JID - 7703966 RN - 0 (Antibodies) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM MH - Animals MH - Antibodies/immunology MH - Cells, Cultured MH - Colony Count, Microbial MH - *Cytotoxicity, Immunologic MH - Dose-Response Relationship, Immunologic MH - Macrophage Activation MH - Macrophages/*immunology/microbiology MH - Mice MH - Mice, Inbred BALB C MH - Mycoplasma/*physiology MH - Tumor Necrosis Factor-alpha/*biosynthesis/immunology EDAT- 1990/01/01 00:00 MHDA- 1990/01/01 00:01 CRDT- 1990/01/01 00:00 PHST- 1990/01/01 00:00 [pubmed] PHST- 1990/01/01 00:01 [medline] PHST- 1990/01/01 00:00 [entrez] AID - 10.1111/j.1348-0421.1990.tb01006.x [doi] PST - ppublish SO - Microbiol Immunol. 1990;34(3):231-43. doi: 10.1111/j.1348-0421.1990.tb01006.x.