NCIt definition : A human immunoglobulin G2 (IgG2) monoclonal antibody directed against human proprotein
convertase subtilisin/kexin type 9 (PCSK9), with potential anti-hypercholesterolemic,
anti-hyperlipidemic and antineoplastic activities. Upon administration, tafolecimab
targets, binds to and inhibits the activity of PCSK9. This prevents the binding of
PCSK9 to low-density lipoprotein receptor (LDLR) on hepatocytes and prevents its degradation.
This increases LDLR on hepatocytes and increases the liver's ability to remove LDL
cholesterol (LDL-C) from the blood, thereby lowering LDL-C levels. In addition, as
PCSK9 may regulate proliferation and apoptosis in certain human cancer cells, tafolecimab
may be able to inhibit proliferation and induce apoptosis in susceptible cancer cells,
possibly due to its cholesterol-lowering effects. Tafolecimab may also enhance the
anti-tumor immune response. PCSK9 binds to LDLR on the surface of hepatocytes to promote
LDLR degradation within the liver.;