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Case reports of proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibition nonresponse.

Saeed A, Virani SS, Jones PH, Ballantyne CM, Nambi V. Case reports of proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibition nonresponse. Journal of clinical lipidology. 2018 Sep 1; 12(5):1141-1145.

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Abstract:

Proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors, a novel class of monoclonal antibodies, reduces low-density lipoprotein cholesterol levels and improves cardiovascular outcomes. Given the short time frame, these agents have been available for use; reports of nonresponse to the PCSK9 inhibitor therapy are scarce in literature. We describe 2 cases with substantially lesser than expected low-density lipoprotein cholesterol lowering on PCSK9 therapy. Nonresponse to PCSK9 inhibition was attributed to autosomal recessive hypercholesterolemia (secondary to low-density lipoprotein receptor adaptor protein 1 mutation) and plasmapheresis after PCSK9 inhibitor drug injections. Additional PCSK9 inhibitor nonresponders are likely to emerge as the use of these agents increases overtime.





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