PMID- 10471611 OWN - NLM STAT- MEDLINE DCOM- 19991014 LR - 20081121 IS - 1073-449X (Print) IS - 1073-449X (Linking) VI - 160 IP - 3 DP - 1999 Sep TI - Interleukin-18 enhances antigen-induced eosinophil recruitment into the mouse airways. PG - 873-8 AB - Interleukin-18 (IL-18) has recently been identified as an IFN-gamma-inducing factor. Previous studies have shown that CD4(+) T cells, IL-5, and TNF-alpha mediate, but IFN-gamma and IL-12 (via IFN-gamma production) inhibit antigen-induced eosinophil recruitment into the airways of sensitized mice. Here, we showed that the administration of recombinant murine IL-18 enhanced antigen-induced eosinophil recruitment into the trachea and bronchoalveolar lavage fluids (BALF) of sensitized mice in a dose-dependent manner. The administration of IL-18 enhanced antigen-induced IFN-gamma and TNF-alpha production, but not IL-5 production, in the BALF and lungs of sensitized mice. Neutralizing antibody against TNF-alpha prevented antigen-induced eosinophil recruitment into the BALF of sensitized mice. Although IL-18 enhanced antigen-induced airway eosinophilia, IL-18 did not affect antigen-induced airway hyperresponsiveness in sensitized mice. These results indicate that IL-18, unlike IFN-gamma and IL-12, enhances antigen-induced eosinophil recruitment into the airways in part by increasing antigen-induced TNF-alpha production of sensitized animals. These findings suggest that IL-18 may contribute to the development and exacerbation of airway inflammation in asthma. FAU - Kumano, K AU - Kumano K AD - Departments of Medicine II and Physiology II, Chiba University School of Medicine, Chiba, Japan. FAU - Nakao, A AU - Nakao A FAU - Nakajima, H AU - Nakajima H FAU - Hayashi, F AU - Hayashi F FAU - Kurimoto, M AU - Kurimoto M FAU - Okamura, H AU - Okamura H FAU - Saito, Y AU - Saito Y FAU - Iwamoto, I AU - Iwamoto I LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Respir Crit Care Med JT - American journal of respiratory and critical care medicine JID - 9421642 RN - 0 (Antigens) RN - 0 (Interleukin-18) RN - 0 (Interleukin-5) RN - 0 (Recombinant Proteins) RN - 0 (Tumor Necrosis Factor-alpha) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Analysis of Variance MH - Animals MH - Antigens/*drug effects/immunology MH - Bronchoalveolar Lavage Fluid/chemistry MH - Enzyme-Linked Immunosorbent Assay MH - Eosinophils/*drug effects/immunology MH - Female MH - Interferon-gamma/biosynthesis MH - Interleukin-18/immunology/*pharmacology MH - Interleukin-5/biosynthesis MH - Mice MH - Mice, Inbred BALB C MH - Recombinant Proteins/immunology/pharmacology MH - Trachea/*drug effects/immunology MH - Tumor Necrosis Factor-alpha/biosynthesis EDAT- 1999/09/03 00:00 MHDA- 1999/09/03 00:01 CRDT- 1999/09/03 00:00 PHST- 1999/09/03 00:00 [pubmed] PHST- 1999/09/03 00:01 [medline] PHST- 1999/09/03 00:00 [entrez] AID - 10.1164/ajrccm.160.3.9805026 [doi] PST - ppublish SO - Am J Respir Crit Care Med. 1999 Sep;160(3):873-8. doi: 10.1164/ajrccm.160.3.9805026.