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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cooke, G. Govender, P. Watson, C. J. Armstrong, M. E. O'Dwyer, D. N. Keane, M. P. King, R. Tynan, A. Dunn, M. Donnelly, S. C. |
| Description | Country affiliation: Ireland Author Affiliation: Cooke G ( School of Medicine and Medical Science, Conway Institute for Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland. gordon.cooke@ucd.ie.) |
| Abstract | BACKGROUND: Sarcoidosis is a multisystem granulomatous disease of unknown aetiology. Proteins present within the alveolar space early in sarcoidosis disease may provide an insight into novel mechanisms for the development of fibrotic disease and in particular pulmonary fibrosis. METHODS: A modified two-dimensional difference gel electrophoresis protocol was applied to the human bronchoalveolar lavage fluid (hBALF) of four patients with non-persistent pulmonary interstitial disease at 4-year follow-up (defined as mild disease) and four patients who developed pulmonary interstitial disease at 4-year follow-up (defined as severe disease). The protein ß-actin was identified by LC-MS/MS from a preparative gel and found to be significantly elevated in early lavages from the severe disease group. To look at the potential pro-fibrotic effects of this protein, primary human pulmonary fibroblasts (CCD-19Lu) were treated with recombinant ß-actin following which qPCR and ELISA assays were used to measure any effects. RESULTS: We found that ß-actin levels were significantly elevated in early hBALF samples in patients who subsequently developed severe disease when compared to the mild group. Treating primary human pulmonary fibroblasts with recombinant ß-actin led to enhanced gene expression of the pro-fibrotic markers alpha smooth muscle actin and collagen 1 as well as the increased secretion of interleukin-13 and metalloproteinases 3 and 9. CONCLUSION: Free ß-actin within the lungs of sarcoidosis patients potentially may contribute to disease pathogenesis particularly in the context of abnormal remodelling and the development of pulmonary fibrosis. |
| File Format | HTM / HTML |
| ISSN | 14602725 |
| e-ISSN | 14602393 |
| Journal | QJM |
| Issue Number | 10 |
| Volume Number | 106 |
| Language | English |
| Publisher | Oxford University Press |
| Publisher Date | 2013-10-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Discipline Medicine Actins Metabolism Lung Diseases Pulmonary Fibrosis Sarcoidosis Bronchoalveolar Lavage Fluid Fibroblasts Cytology Pathology Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine |
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