PMID- 11883701 OWN - NLM STAT- MEDLINE DCOM- 20020321 LR - 20190701 IS - 0024-3205 (Print) IS - 0024-3205 (Linking) VI - 70 IP - 11 DP - 2002 Feb 1 TI - Interleukin-18 reduces expression of cardiac tumor necrosis factor-alpha and atrial natriuretic peptide in a murine model of viral myocarditis. PG - 1225-34 AB - Heart failure is generally believed to begin with myocyte damage caused by a variety of insults, including ischemia, toxin or myocardial infection. The proinflammatory cytokine, tumor necrosis factor-alpha (TNF-alpha), has been hypothesized to play a pathogenetic role in the transition from compensated to decompensated heart failure. Interleukin-18 (IL-18), a recently cloned cytokine synthesized by Kupffer cells, activates macrophages. We examined the therapeutic effect of IL-18 on the modulation of TNF-alpha gene expression in failing heart in a murine model of heart failure caused by viral myocarditis. The heart weight (HW)/ body weight (BW) ratio in IL-18 treated mice 7 days after viral inoculation was significantly lower (P<0.01) than in the untreated controls. Myocardial necrosis and inflammatory cell infiltration were significantly lower in IL-18 treated mice than untreated mice 5 and 7 days after inoculation. The expression of TNF-alpha mRNA in the myocardium was significantly lower on days 5 and 7 in IL-18 treated mice than in infected untreated mice. We conclude that concurrent systemic administration of IL-18 is beneficial in mice with myocarditis, and may be mediated through reduced expression of TNF-alpha in the heart. FAU - Yoshida, Akihiro AU - Yoshida A AD - Department of Laboratory Medicine Gunma University School of Medicine, Maebashi, Japan. FAU - Kand, Tsugiyasu AU - Kand T FAU - Tanaka, Toru AU - Tanaka T FAU - Yokoyama, Tomoyuki AU - Yokoyama T FAU - Kurimoto, Masashi AU - Kurimoto M FAU - Tamura, Junichi AU - Tamura J FAU - Kobayashi, Isao AU - Kobayashi I LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Life Sci JT - Life sciences JID - 0375521 RN - 0 (Interleukin-18) RN - 0 (RNA, Messenger) RN - 0 (Tumor Necrosis Factor-alpha) RN - 63231-63-0 (RNA) RN - 85637-73-6 (Atrial Natriuretic Factor) SB - IM MH - Animals MH - Atrial Natriuretic Factor/*biosynthesis/genetics MH - Disease Models, Animal MH - Female MH - Heart/drug effects MH - Immunohistochemistry MH - In Situ Hybridization MH - Interleukin-18/*therapeutic use MH - Mice MH - Mice, Inbred C3H MH - Myocarditis/*drug therapy/pathology/virology MH - Myocardium/chemistry/*metabolism/pathology MH - Necrosis MH - Organ Size/drug effects MH - RNA/isolation & purification MH - RNA, Messenger/metabolism MH - Tumor Necrosis Factor-alpha/analysis/*biosynthesis EDAT- 2002/03/09 10:00 MHDA- 2002/03/22 10:01 CRDT- 2002/03/09 10:00 PHST- 2002/03/09 10:00 [pubmed] PHST- 2002/03/22 10:01 [medline] PHST- 2002/03/09 10:00 [entrez] AID - S0024-3205(01)01509-0 [pii] AID - 10.1016/s0024-3205(01)01509-0 [doi] PST - ppublish SO - Life Sci. 2002 Feb 1;70(11):1225-34. doi: 10.1016/s0024-3205(01)01509-0.