PMID- 10836352 OWN - NLM STAT- MEDLINE DCOM- 20000809 LR - 20190822 IS - 0903-1936 (Print) IS - 0903-1936 (Linking) VI - 13 IP - 1 DP - 1999 Jan TI - Activation of lymphocytes and increased interleukin-5 levels in bronchoalveolar lavage fluid in acute eosinophilic pneumonia. PG - 217-20 AB - Acute eosinophilic pneumonia (AEP) is a recently described illness and the number of case reports has increased during the last few years. However, the role of interleukin (IL)-5 and activated lymphocytes in the pathogenesis or activity of AEP is still not clear. The clinical features, lymphocyte surface analysis and IL-5 concentrations in bronchoalveolar lavage fluid (BALF) and peripheral blood (PB) of a young female patient with AEP are described before and at 2 weeks, 4 weeks and 6 months after a 3-day course of i.v. methylprednisolone. Serum and BALF concentrations of IL-5 before treatment were 5,200 and 8,400 pg x mL(-1), respectively. Activated CD4 lymphocytes bearing CD25 and human leukocyte antigen (HLA)-DR in BALF were higher than in PB. Treatment caused a rapid fall in these cells and levels of IL-5 in BALF returned to normal levels in parallel with clinical improvement. There was no evidence of recurrence after cessation of steroid therapy. In contrast, eosinophilia in BALF persisted for 4 weeks after steroid therapy in spite of normalization of the chest radiograph and arterial blood gases. The number of CD8+CD11b- (suppressor/cytotoxic) T-cells subsequently increased while the number of CD8+CD11b+ cells decreased. These results suggest that activated CD4 cells and interleukin-5 elevation contribute to the development of acute eosinophilic pneumonia rather than persistent eosinophilia in the lung and that a short course of steroid therapy may effectively control acute eosinophilic pneumonia. FAU - Taniguchi, H AU - Taniguchi H AD - The Second Dept of Internal Medicine, Nagasaki University School of Medicine, Japan. FAU - Kadota, J AU - Kadota J FAU - Fujii, T AU - Fujii T FAU - Matsubara, Y AU - Matsubara Y FAU - Katoh, S AU - Katoh S FAU - Mukae, H AU - Mukae H FAU - Matsukura, S AU - Matsukura S FAU - Kohno, S AU - Kohno S LA - eng PT - Case Reports PT - Journal Article PL - England TA - Eur Respir J JT - The European respiratory journal JID - 8803460 RN - 0 (Interleukin-5) SB - IM MH - Acute Disease MH - Adult MH - Bronchoalveolar Lavage Fluid/*chemistry MH - Female MH - Humans MH - Interleukin-5/*analysis MH - *Lymphocyte Activation MH - Pulmonary Eosinophilia/*diagnosis/*immunology EDAT- 2000/06/03 09:00 MHDA- 2000/08/12 11:00 CRDT- 2000/06/03 09:00 PHST- 2000/06/03 09:00 [pubmed] PHST- 2000/08/12 11:00 [medline] PHST- 2000/06/03 09:00 [entrez] AID - 10.1034/j.1399-3003.1999.13a40.x [doi] PST - ppublish SO - Eur Respir J. 1999 Jan;13(1):217-20. doi: 10.1034/j.1399-3003.1999.13a40.x.