Regulatory Effect of Prostaglandin E2on Fibronectin Release from Human Alveolar Macrophages
| Autor: | Toshihiko Kamei, Youichi Nakamura, Hiroki Moriguchi, Takeshi Ogura, Susumu Yasuoka, Toshio Ozaki |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Adult
Lipopolysaccharides Male Pulmonary and Respiratory Medicine Lipopolysaccharide Pulmonary Fibrosis Indomethacin Cell Count Pharmacology Dinoprostone Pathogenesis chemistry.chemical_compound medicine Humans Macrophage Prostaglandin E2 Cells Cultured biology business.industry Macrophages Zymosan Middle Aged Fibronectins Pulmonary Alveoli Fibronectin medicine.anatomical_structure chemistry Immunology biology.protein Tetradecanoylphorbol Acetate Liberation Female Pulmonary alveolus business Bronchoalveolar Lavage Fluid medicine.drug |
| Zdroj: | American Review of Respiratory Disease. 141:965-969 |
| ISSN: | 0003-0805 |
| Popis: | Fibronectin (Fn), which is released from several kinds of cells including alveolar macrophages (AM), is important in inflammatory reactions in the certain lung diseases such as idiopathic pulmonary fibrosis (IPF). Therefore, information on the mechanisms regulating Fn release from AM may be useful for elucidating the pathogenesis of these diseases and developing therapeutic modalities. We supposed that prostaglandin E2 (PGE2), which is known to modulate cellular functions, might be involved in regulation of Fn release, and, accordingly, we measured the release of Fn and PGE2 from AM from normal volunteers (NV), control patients (CP), and patients with IPF. AM from patients with IPF were found to release more Fn than AM from NV (IPF: 250 +/- 58.8/10(6) cells.24 h, NV: 53.0 +/- 7.3 ng/10(6) cells.24 h) and to release less PGE2 than the latter (IPF: 0.48 +/- 0.12 ng/10(6) cells.24 h, NV:1.35 +/- 0.24 ng/10(6) cells.24 h). A negative correlation was found between the contents of Fn and PGE2 in the culture media of AM from NV, CP, and patients with IPF. Lipopolysaccharide, phorbol myristate acetate, and zymosan suppressed Fn release from AM but stimulated their PGE2 release, and these effects were reversed by indomethacin. Exogenous PGE2 (greater than 1 x 10(-8) M) suppressed Fn release. The albumin-antialbumin complex stimulated Fn release but did not affect PGE2 release. These results indicate that Fn release from AM changed in response to various stimuli, and that PGE2 is important in suppressing Fn release from AM, suggesting a negative feedback mechanism of PGE2 in releasing Fn. |
| Databáze: | OpenAIRE |
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