Alirocumab and evolocumab are monoclonal antibodies that block proprotein convertase subtilisin/kexin type 9 (PCSK9), a circulating protein that degrades low-density lipoprotein (LDL) receptors. These therapies increase LDL receptors on the cell surface and reduce plasma LDL cholesterol. Both therapies are approved to lower LDL cholesterol, a causative agent for atherosclerotic cardiovascular disease.
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