Lipid-lowering therapy with Inclisiran in the real-world setting: initial data from a national health care service

Abstract Introduction Inclisiran, a first-in-class siRNA enabling long-term inhibition of PCSK9 synthesis, demonstrates good safety and efficacy profile in randomized clinical trials. Challenges for real-life use of inclisiran include limited access to therapy, injections by medical staff, lack of cardiovascular outcome data, and concern from adverse effects considering the novel mechanism and long-term activity. Real-life data on the potential to attain lipid-goals and reduce treatment gaps is lacking. We investigated the implementation of inclisiran in real-world clinical setting in Israel. Methods Data from a nationwide healthcare organization on patients initiating inclisiran therapy during the period of 3/2022-11/2023. Patients’ characteristics, efficacy, use of combination lipid-lowering therapies, and attainment of low-density lipoprotein cholesterol (LDL-C) goals, were evaluated. Results Inclisiran was initiated by 503 patients (57% women; mean age 66±11 years). Atherosclerotic cardiovascular disease was present in 54%, and peak historical LDL-C levels >190 mg/dL documented in 64%. Prior exposure to PCSK9 monoclonal antibodies was evident in 28%. Follow-up lipid profile >2 months after filling first prescription, was available in 397 patients (347 with ≥2 injections). In patients treated by inclisiran only (n=254), median LDL-C reduction from peak historical levels was 57% (IQR, 48%-67%), and from pre-injection levels 40% (19%-54%). In those with concomitant oral lipid-lowering therapies (n=143), median LDL-C reduction from peak levels was 66% (IQR, 55%-73%), and from pre-injection levels 46% (23%-59%) (Figure). LDL-C <70 mg/dL was attained by 39% and LDL-C <55 mg/dL by 21.9%. Of those treated with concomitant statin therapy, 38% attained LDL-C <55 mg/dL. Overall, 6.5% did not persist with inclisiran therapy after initial injection. Conclusions In real-life practice, inclisiran showed good efficacy with positive short-term adherence. However, attainment rates of lipid-goals were suboptimal due to limited use of combination lipid-lowering therapy and high-rates of severe hypercholesterolemia in our patient population cohort.Waterfall Plot of LDL-C (%) Reduction