A rare but fatal disease of blood vessels in the lung may be caused in part by aberrant silencing of genes rather than genetic mutation, new fact-finding reports. Pulmonary venous blood hypertension, a problem characterized by gradual blockage of blood vessels in the lungs, has been linked to genetic causes in a small winnings of patients. But teaching hospital of Chicago researchers have now found that a form of epigenetics - the capricious of gene articulation - causes the disease in an animal model and could complementary to the disease in humans.

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