Cited by 172Lipoproteins and Cardiovascular HealthLipid metabolism and disordersCholesterol and Lipid Metabolism

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Effect of 1 or 2 Doses of Inclisiran on Low-Density Lipoprotein Cholesterol Levels: One-Year Follow-up of the ORION-1 Randomized Clinical Trial

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Abstract

Importance: Sustained reductions in low-density lipoprotein cholesterol (LDL-C) with lipid-lowering therapies that require frequent dosing are reliant on patient adherence, and poor adherence is associated with worse clinical outcomes. Objective: To determine whether inclisiran, a small interfering RNA, reduces mean LDL-C exposure with an infrequent dosing regimen. Design, Setting, and Participants: Prespecified analysis of a randomized, double-blind, placebo-controlled multicenter phase 2 clinical trial. Participants were followed up monthly for LDL-C levels and proprotein convertase subtilisin-kexin type 9 (PCSK9) measurements as well as safety until their LDL-C levels had returned to within 20% of their change from baseline (maximum 360 days). The study included patients with elevated LDL-C despite maximally tolerated statin therapy. Data were analyzed between January 11, 2016, and June 7, 2017. Interventions: One dose (200, 300, or 500 mg on day 1) or 2 doses (100, 200, or 300 mg on days 1 and 90) of inclisiran sodium or placebo. Main Outcomes and Measures: Duration of time to return to within 20% of change from baseline for LDL-C levels and time-averaged LDL-C reductions over 1 year. Results: At baseline, among the 501 participants, 65% were men (n = 326 of 501), mean age was 63 years, 6% had familial hypercholesterolemia (n = 28 of 501), and 69% had established ASCVD (n = 347 of 501). Baseline LDL-C was 128 mg/dL among 501 randomized participants. The percentage of participants who were followed up to day 360 because their LDL-C levels had not returned to within 20% of their change from baseline ranged from 48.3% to 65.0% for those receiving a single dose and between 55.9% and 83.1% of those receiving 2 doses, with similar effects observed for PCSK9. Time-averaged reduction in LDL-C levels over 1 year after a single dose ranged from 29.5% to 38.7% (P < .001 between groups) and from 29.9% to 46.4% (P < .001 between groups) for those who received 2 doses. The 2-dose 300-mg regimen produced the highest proportion of responders at day 360 and the greatest mean reduction in LDL-C over 1 year. Incidence of adverse events was similar through to 1 year. Conclusions and Relevance: Treatment with inclisiran resulted in durable reductions in LDL-C over 1 year. Inclisiran may offer a novel approach to LDL-C reduction with the convenience of infrequent dosing. Trial Registration: ClinicalTrials.gov identifier: NCT02597127.

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Authors
Ray, K. K., Stoekenbroek, R. M., Kallend, D., Nishikido, T., Leiter, L. A., Landmesser, U., Wright, R. S., Wijngaard, P. L. J., & Kastelein, J. J. P.
Affiliations
  • Charing Cross Hospital (GB)
  • Medicines Company (United States) (US)
  • Saga University (JP)
  • University of Toronto (CA)
  • Charité – Universitätsmedizin Berlin (DE)
  • Mayo Clinic (US)
  • University of Amsterdam (NL)
Corresponding author
Ray, Kausik K.
Venue
JAMA Cardiology
Published
2019-11-01
Volume
4
Issue
11
Pages
1067
ISSN
2380-6583 (ISSN-L)
OpenAlex
W2976144989
Cited by
172
References
17
Citations by year
2026: 12 · 2025: 24 · 2024: 33 · 2023: 25 · 2022: 19 · 2021: 20 · 2020: 34 · 2019: 5
FWCI
18.63
Type
journal article
Language
en
Open access
Locations
  • JAMA Cardiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Pure Amsterdam UMC (submittedVersion)
  • Spiral (Imperial College London) (submittedVersion)
Funders
Medicines Company
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipoproteins and Cardiovascular Health
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Cholesterol and Lipid Metabolism
Keywords
inclisiran, LDL cholesterol, PCSK9, siRNA, single-dose regimen, dosing frequency, statin-resistant hypercholesterolemia, lipid-lowering therapy, PCSK9 inhibition, patient adherence, familial hypercholesterolemia, atherosclerotic cardiovascular disease
MeSH terms
Aged, Dose-Response Relationship, Drug, Double-Blind Method, Drug Administration Schedule, Female, Follow-Up Studies, Humans, Hypercholesterolemia, Injections, Subcutaneous, Cholesterol, LDL, Male, Middle Aged, Severity of Illness Index, Time Factors, Treatment Outcome, Risk Assessment, RNA, Small Interfering, Patient Safety

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