Gene for cellular receptors could be key for lower heart risk

People with a certain form of a gene that influences blood flow may have a lower risk of having a heart attack and dying from heart disease, according to a new study in today’s rapid access issue of Circulation: Journal of the American Heart Association. The gene controls variations in beta-2 adrenergic receptors, which are on the surface of heart muscle cells and blood vessel cell walls. When activated by adrenaline and noradrenaline, these receptors set in motion a series of events that dilate the blood vessels and increase heart rate.