PCSK9 Inhibition During the Inflammatory Stage of SARS-CoV-2 Infection.

BACKGROUND

The intensity of inflammation during COVID-19 is related to adverse outcomes. Proprotein convertase subtilisin/kexin type 9 (PCSK9) is involved in low-density lipoprotein receptor homeostasis, with potential influence on vascular inflammation and on COVID-19 inflammatory response.

OBJECTIVES

The goal of this study was to investigate the impact of PCSK9 inhibition vs placebo on clinical and laboratory outcomes in patients with severe COVID-19.

METHODS

In this double-blind, placebo-controlled, multicenter pilot trial, 60 patients hospitalized for severe COVID-19, with ground-glass opacity pneumonia and arterial partial oxygen pressure to fraction of inspired oxygen ratio ≤300 mm Hg, were randomized 1:1 to receive a single 140-mg subcutaneous injection of evolocumab or placebo. The primary endpoint was death or need for intubation at 30 days. The main secondary endpoint was change in circulating interleukin (IL)-6 at 7 and 30 days from baseline.

RESULTS

Patients randomized to receive the PCSK9 inhibitor had lower rates of death or need for intubation within 30 days vs placebo (23.3% vs 53.3%, risk difference: -30%; 95% CI: -53.40% to -6.59%). Serum IL-6 across time was lower with the PCSK9 inhibitor than with placebo (30-day decline: -56% vs -21%). Patients with baseline IL-6 above the median had lower mortality with PCSK9 inhibition vs placebo (risk difference: -37.50%; 95% CI: -68.20% to -6.70%).

CONCLUSIONS

PCSK9 inhibition compared with placebo reduced the primary endpoint of death or need for intubation and IL-6 levels in severe COVID-19. Patients with more intense inflammation at randomization had better survival with PCSK9 inhibition vs placebo, indicating that inflammatory intensity may drive therapeutic benefits. (Impact of PCSK9 Inhibition on Clinical Outcome in Patients During the Inflammatory Stage of the COVID-19 [IMPACT-SIRIO 5]; NCT04941105).

Informations de copyright

Copyright © 2023 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.

Déclaration de conflit d'intérêts

Funding Support and Author Disclosures This research was supported by the Collegium Medicum of Nicolaus Copernicus University (grant ID ZES.WL.2.2021). Dr Navarese has received speaker and consultancy fees from Amgen, Sanofi-Regeneron, Bayer; and has received grants from Abbott, outside the submitted work. Dr Gurbel has received grants and personal fees from Bayer HealthCare LLC, Otitopic Inc, Amgen, Janssen, U.S. WorldMeds LLC, Instrumentation Laboratory, Haemonetics, Medicure Inc, Idorsia Pharmaceuticals, Hikari Dx, and Novartis; has received personal fees from UpToDate, outside the submitted work; has a patent issued (Detection of Restenosis Risk in Patients and Assessment of Cardiac Health and Thrombotic Risk in a Patient); and is an expert witness in litigation involving clopidogrel. Dr Gorog has received institutional research grants from Bayer and Bristol Myers Squibb; and has received speaker fees from AstraZeneca, Bayer, and Boehringer Ingelheim. Dr Andreotti has received lecture/consultancy fees from Amgen, Bayer, BMS/Pfizer, and Daiichi-Sankyo. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.