Researchers at Case Western Reserve University say their discovery of new inflammatory molecules could transform medical treatment. For many years, scientists believed they had a solid grasp of the biological processes behind asthma, a condition marked by lung inflammation that narrows airways and makes breathing difficult. They pointed to molecules known as “leukotrienes,” which are released by white blood cells in response to airway irritation or allergens, as the primary cause. These molecules trigger a chain reaction that tightens airways, and several drugs have been designed to block this process. However, a research team at Case Western Reserve University suggests...