COVIDENZA - A Prospective, Multicenter, Randomized PHASE II Clinical Trial of Enzalutamide Treatment to Decrease the Morbidity in Patients with Corona Virus Disease 2019 (COVID-19)
Authors: Welen Karin , Wernstedt Anna Överby , Ahlm Clas , Freyhult Eva , Robinsson David , Henningsson Anna Jonsson , Stranne Johan , Bremell Daniel , Angelin Martin , Lindquist Elisabeth , Buckland Robert , Karlsson Camilla Thellenberg , Pauksens Karlis , Axelsson Anna Bill , Akre Olof , Ryden Cecilia , Wagenius Magnus , Bjartell Anders , Nilsson Anna , Styrke Johan , Repo Johanna , Balkhed Åse Östholm , Niward Katarina , Gisslen Magnus , Josefsson Andreas 
Published: February 2021

Abstract
ObjectivesThe main goal of the COVIDENZA trial is to evaluate if inhibition of testosterone signalling by enzalutamide can improve the outcome of patients hospitalized for COVID-19. The hypothesis is based on the observation that the majority of patients in need of intensive care are male, and the connection between androgen receptor signalling and expression of TMPRSS2, an enzyme important for SARS-CoV-2 host cell internalization.Trial designHospitalized COVID-19 patients will be randomised (2:1) to enzalutamide plus standard of care vs. standard of care designed to identify superiority.ParticipantsIncluded participants, men or women above 50 years of age, must be hospitalized for PCR confirmed COVID-19 symptoms and not in need of immediate mechanical ventilation. Major exclusion criteria are breast-feeding or pregnant women, hormonal treatment for prostate or breast cancer, treatment with immunosuppressive drugs, current symptomatic unstable cardiovascular disease (see additional file 1 for further details). The trial is registered at Umeå University Hospital, Region Västerbotten, Sweden and 8 hospitals are approved for inclusion in Sweden.Intervention and comparatorPatients randomised to the treatment arm will be treated orally with 160 mg (4x40 mg) enzalutamide (Xtandi®) daily, for five consecutive days. The study is not placebo controlled. The comparator is standard of care treatment for patients hospitalised with COVID-19.Main outcomesThe primary endpoints of the study are (time to) need of mechanical ventilation or discharge from hospital as assessed by a clinical 7-point ordinal scale (up to 30 days after inclusion).RandomisationRandomisation was stratified by center and sex. Each strata was randomized separately with block size six with a 2:1 allocation ratio (enzalutamide + “standard of care”: “standard of care”). The randomisation list, with consecutive subject numbers, was generated by an independent statistician using the PROC PLAN procedure of SAS version 9.4 software (SAS Institute, Inc, Cary, North Carolina)Blinding (masking)This is an open-label trial.Numbers to be randomised (sample size)The trial is designed to have three phases. The first, an exploration phase of 45 participants (30 treatment and 15 control) will focus on safety and includes a more extensive laboratory assessment as well as more frequent safety evaluation. The second prolongation phase, includes the first 100 participants followed by an interim analysis to define the power of the study. The third phase is the continuation of the study up to maximum 600 participants included in total.Trial StatusThe current protocol version is COVIDENZA v2.0 as of September 10, 2020. Recruitment started July 29, 2020 and is presently in safety pause after the first exploration phase. Recruitment is anticipated to be complete by 31 December 2021.Trial registrationEudract number 2020-002027-10ClinicalTrials.gov Identifier: NCT04475601, registered June 8, 2020