Tobacco smoke-induced lung fibrosis and emphysema.
Annual review of physiology(2013)
Abstract
Despite public health campaigns discouraging smoking, 1,000 American children every day become smokers, ensuring that tobacco-related health complications will be with us for decades to come. Smoking is the greatest risk factor for both chronic obstructive lung disease and interstitial lung disease. The facts that not every smoker develops chronic lung disease and that lung pathology differs markedly among smokers indicate that individual susceptibility must be a central determinant of lung injury responses to cigarette smoke. Comparative examination of pathogenic mechanisms of smoke-induced lung disease can shed light on the homeostatic pathways critical to maintaining lung health. In this review, we explore common and divergent biological forces tilting the lung homeostatic balance away from health and toward emphysema or pulmonary fibrosis. We emphasize recent insights that highlight the greatest contrasts or similarities in the pathogenesis of these two chronic lung disease phenotypes.
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