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Extracellular histones promote pulmonary fibrosis in patients with coal workers' pneumoconiosis.
Journal of Occupational and Environmental Medicine 2018 October 11
OBJECTIVE: This investigation assessed the pro-fibrotic role that extracellular histones play in the pathogenesis of coal workers' pneumoconiosis (CWP).
METHODS: The correlation of extracellular histones with small opacity profusion (SOP) and transforming growth factor-β (TGF-β) was analyzed. The stimulating effect of extracellular histones on pulmonary fibroblast was assessed in vitro.
RESULTS: The levels of extracellular histones in plasma were positively correlated with SOP and TGF-β in the coal miners investigated. Plasma collected from patients with CWP caused apparent lung fibroblast proliferation, while anti-H4 antibody antagonized the stimulating effect of the patient plasma by blocking histone H4. In vitro experiments showed that extracellular histones directly stimulated fibroblast proliferation.
CONCLUSION: Consistent with our hypothesis, the concentrations of extracellular histones were indices of the severity of pulmonary fibrosis in simple CWP, and extracellular histones-targeted intervention could inhibit the proliferation of lung fibroblast.
METHODS: The correlation of extracellular histones with small opacity profusion (SOP) and transforming growth factor-β (TGF-β) was analyzed. The stimulating effect of extracellular histones on pulmonary fibroblast was assessed in vitro.
RESULTS: The levels of extracellular histones in plasma were positively correlated with SOP and TGF-β in the coal miners investigated. Plasma collected from patients with CWP caused apparent lung fibroblast proliferation, while anti-H4 antibody antagonized the stimulating effect of the patient plasma by blocking histone H4. In vitro experiments showed that extracellular histones directly stimulated fibroblast proliferation.
CONCLUSION: Consistent with our hypothesis, the concentrations of extracellular histones were indices of the severity of pulmonary fibrosis in simple CWP, and extracellular histones-targeted intervention could inhibit the proliferation of lung fibroblast.
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