Journal
PEDIATRIC PULMONOLOGY
Volume 41, Issue 8, Pages 771-778Publisher
WILEY-LISS
DOI: 10.1002/ppul.20452
Keywords
pulmonary; fibrosis; chronic inflammation; furin; trans-Golgi Network
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Funding
- NIAID NIH HHS [AI 31139, AI 50825] Funding Source: Medline
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Cystic fibrosis (CF) remains a fatal progressive disease in spite of the discovery and characterization of the CFTR gene. Transforming growth factor beta (TGF-beta) has been implicated in pathophysiology of CF Previous reports have shown the trans-Golgi network (TGN) is hyperacdified in CF epithelial cells in culture and that this hyperacidification can be corrected with the membrane permeant weak base, chloroquine. In this study bioactive TGF-beta produced by CF and normal cells was measured using a reporter cell line with a TGF-beta responsive promoter linked to luciferase. Increased levels of TGF-beta were detected in the conditioned media from CF epithelial cells compared to their matched controls-(IB3-1 vs. S9; pCEP-R vs. pCEP CuFi-4 vs. NuLi-1). Levels of TGF-beta were normalized with chloroquine indicating that the hyperacidification of the TGN of CIF cells is responsible for the altered TGF-beta levels.
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