Inflammation still ravages the lungs of some smokers years after they quit the habit. What sparks that smoldering destruction remained a mystery until a consortium of researchers led by Baylor College of Medicine found that certain dendritic cells in the lung – the cells that “present” a foreign antigen or protein to the immune system – provoke production of destructive T-cells that attack a key protein called elastin, leading to death of lung tissue and emphysema.
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