Study protocol for a multicentre, prospective cohort study of the association of angiotensin II type 1 receptor blockers on outcomes of coronavirus infection

James A Russell, John C Marshall, Arthur Slutsky, Srinivas Murthy, Dave Sweet, Terry Lee, Joel Singer, David M Patrick, Bin Du, Zhiyong Peng, Matthew Cheng, Kevin D Burns, Michael O Harhay, James A Russell, John C Marshall, Arthur Slutsky, Srinivas Murthy, Dave Sweet, Terry Lee, Joel Singer, David M Patrick, Bin Du, Zhiyong Peng, Matthew Cheng, Kevin D Burns, Michael O Harhay

Abstract

Introduction: The COVID-19 epidemic grows and there are clinical trials of antivirals. There is an opportunity to complement these trials with investigation of angiotensin II type 1 receptor blockers (ARBs) because an ARB (losartan) was effective in murine influenza pneumonia.

Methods and analysis: Our innovative design includes: ARBs; alignment with the WHO Ordinal Scale (primary endpoint) to align with other COVID-19 trials; joint longitudinal analysis; and predictive biomarkers (angiotensins I, 1-7, II and ACE1 and ACE2). Our hypothesis is: ARBs decrease the need for hospitalisation, severity (need for ventilation, vasopressors, extracorporeal membrane oxygenation or renal replacement therapy) or mortality of hospitalised COVID-19 infected adults. Our two-pronged multicentre pragmatic observational cohort study examines safety and effectiveness of ARBs in (1) hospitalised adult patients with COVID-19 and (2) out-patients already on or not on ARBs. The primary outcome will be evaluated by ordinal logistic regression and main secondary outcomes by both joint longitudinal modelling analyses. We will compare rates of hospitalisation of ARB-exposed versus not ARB-exposed patients. We will also determine whether continuing ARBs or not decreases the primary outcome. Based on published COVID-19 cohorts, assuming 15% of patients are ARB-exposed, a total sample size of 497 patients can detect a proportional OR of 0.5 (alpha=0.05, 80% power) comparing WHO scale of ARB-exposed versus non-ARB-exposed patients.

Ethics and dissemination: This study has core institution approval (UBC Providence Healthcare Research Ethics Board) and site institution approvals (Health Research Ethics Board, University of Alberta; Comite d'etique de la recerche, CHU Sainte Justine (for McGill University and University of Sherbrook); Conjoint Health Research Ethics Board, University of Calgary; Queen's University Health Sciences & Affiliated Hospitals Research Ethics Board; Research Ethics Board, Sunnybrook Health Sciences Centre; Veritas Independent Research Board (for Humber River Hospital); Mount Sinai Hospital Research Ethics Board; Unity Health Toronto Research Ethics Board, St. Michael's Hospital). Results will be disseminated by peer-review publication and social media releases.

Trial registration number: NCT04510623.

Keywords: adult intensive & critical care; cardiology; hypertension.

Conflict of interest statement

Competing interests: JR reports patents owned by the University of British Columbia (UBC) that are related to the use of PCSK9 inhibitor(s) in sepsis, and related to the use of vasopressin in septic shock and a patent owned by Ferring for use of selepressin in septic shock. JR is an inventor on these patents. JR was a founder, Director and shareholder in Cyon Therapeutics Inc. and is a shareholder in Molecular You Corp. JR reports receiving consulting fees in the last 3 years from: (1) Asahi Kesai Pharmaceuticals of America (AKPA) (was developing recombinant thrombomodulin in sepsis). (2) SIB Therapeutics LLC (developing a sepsis drug). (3) Ferring Pharmaceuticals (manufactures vasopressin and developing selepressin). JR is no longer actively consulting for the following: (4) La Jolla Pharmaceuticals (developing angiotensin II; JR chaired the DSMB of a trial of angiotensin II from 2015–2017). (5) PAR Pharma (sells prepared bags of vasopressin). JR reports having received an investigator-initiated grant from Grifols (entitled 'Is HBP a mechanism of albumin’s efficacy in human septic shock?') that was provided to and administered by UBC.

© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

Figures

Figure 1
Figure 1
Flow chart of patients. ARBs, angiotensin receptor blockers, ACEi, ACE inhibitor; ARB, angiotensin receptor blockers.

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