PMID- 11069843 OWN - NLM STAT- MEDLINE DCOM- 20001214 LR - 20081121 IS - 1073-449X (Print) IS - 1073-449X (Linking) VI - 162 IP - 5 DP - 2000 Nov TI - Increased levels of interleukin-18 in patients with pulmonary sarcoidosis. PG - 1979-82 AB - Interleukin-18 (IL-18) has recently been identified as an interferon-gamma (IFN-gamma)-inducing factor, and it plays an important role in T helper 1 (Th1) response. We measured the serum levels of IL-18 and IFN- gamma in 37 patients with pulmonary sarcoidosis and 25 healthy control subjects. We also measured the levels of IL-18 and IFN-gamma in 10-fold concentrated bronchoalveolar lavage (BAL) fluids of 19 patients with pulmonary sarcoidosis and 9 healthy control subjects (all lifelong nonsmokers). The levels of serum IL-18 and IFN-gamma were significantly increased in patients with sarcoidosis. The levels of BAL fluid IL-18 were significantly elevated in patients with sarcoidosis, however, the IFN-gamma levels of the patients and control subjects were all below sensitivity. Serum IL-18 levels significantly correlated with serum IFN-gamma levels and lysozyme activity. The patients positive for gallium-67 ((67)Ga) scan had significantly elevated serum IL-18 levels as compared with those of the negative patients. BAL fluid IL-18 levels significantly correlated with serum IL-18 levels in patients with sarcoidosis, and there was a significant correlation between IL-18 levels and lymphocyte proportions in sarcoid BAL fluids. In patients with sarcoidosis, IL-18 seems to induce IFN-gamma production and IL-18 levels in sera may reflect disease activity of sarcoidosis. FAU - Shigehara, K AU - Shigehara K AD - Third Department of Internal Medicine and First Department of Pathology, Sapporo Medical University School of Medicine, Hokkaido Branch of the Japan Anti-tuberculosis Association, Sapporo, Japan. FAU - Shijubo, N AU - Shijubo N FAU - Ohmichi, M AU - Ohmichi M FAU - Yamada, G AU - Yamada G FAU - Takahashi, R AU - Takahashi R FAU - Okamura, H AU - Okamura H FAU - Kurimoto, M AU - Kurimoto M FAU - Hiraga, Y AU - Hiraga Y FAU - Tatsuno, T AU - Tatsuno T FAU - Abe, S AU - Abe S FAU - Sato, N AU - Sato N LA - eng PT - Journal Article PL - United States TA - Am J Respir Crit Care Med JT - American journal of respiratory and critical care medicine JID - 9421642 RN - 0 (Interleukin-18) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Adult MH - Bronchoalveolar Lavage Fluid/chemistry MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Humans MH - Interferon-gamma/analysis/blood MH - Interleukin-18/*analysis/blood MH - Male MH - Middle Aged MH - Sarcoidosis, Pulmonary/*metabolism EDAT- 2000/11/09 11:00 MHDA- 2001/02/28 10:01 CRDT- 2000/11/09 11:00 PHST- 2000/11/09 11:00 [pubmed] PHST- 2001/02/28 10:01 [medline] PHST- 2000/11/09 11:00 [entrez] AID - 10.1164/ajrccm.162.5.9911113 [doi] PST - ppublish SO - Am J Respir Crit Care Med. 2000 Nov;162(5):1979-82. doi: 10.1164/ajrccm.162.5.9911113.