By making blood vessels tighten, the angiotensin-converting enzyme (ACE) indirectly raises blood pressure. Angiotensin I is changed by ACE into angiotensin II, which tightens the blood vessels. The renin-angiotensin system (RAS), which controls blood pressure by regulating the volume of fluids in the body, is made up of ACE, angiotensin I, and angiotensin II. Cells in the endothelium (inner layer) of blood vessels secrete ACE in the lungs and kidneys. It serves two main purposes: In a substrate concentration-dependent manner, ACE catalyzes the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor.Bradykinin, a potent vasodilator, and other vasoactive peptides are broken down by ACE. In order to treat conditions like high blood pressure, heart failure, diabetic nephropathy, and type 2 diabetes mellitus, ACE inhibition is a goal. Angiotensin II production and bradykinin metabolism are both reduced when ACE is inhibited (by ACE inhibitors), which results in a general dilation of the arteries and veins and a reduction in arterial blood pressure.
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