Don't get left behind! The modernized is coming. Check it out now.
Say goodbye to!
The new site is coming soon - go to the modernized
Working… Menu

Proxalutamide Treatment for COVID-19 Female Outpatients

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT04853134
Recruitment Status : Withdrawn (This study was combined with another study)
First Posted : April 21, 2021
Last Update Posted : March 4, 2022
Information provided by (Responsible Party):
Applied Biology, Inc.

Brief Summary:
This study is intended to explore the possible protective role of anti-androgens in SARS-CoV-2 infection

Condition or disease Intervention/treatment Phase
Covid19 SARS-CoV Infection Drug: Proxalutamide Other: Standard of Care Phase 3

Detailed Description:

During the continuing SARS-CoV-2 (COVID-19) pandemic, several studies have reported a significant difference in the rate of severe cases between adult females and adult males (42% vs 58%).Among children under the age of 14, the rate of severe cases was reported to be extremely low. To explain this difference, several theories have been proposed including cigarette smoking and lifestyle habits. However, no theory fits both the gender difference in severe cases as well as reduced risk in pre-pubescent children. Our past research on male androgenetic alopecia (AGA) has led us to investigate an association between androgens and COVID-19 pathogenesis. In normal subjects, androgen expression demonstrates significant variation between men and women as well as between adults and pre-pubescent children.

SARS-CoV-2 primarily infects type II pneumocytes in the human lung. SARS-CoV-2 enters pneumocytes, by anchoring to the ACE2 cell surface receptor. Prior to receptor binding, viral spike proteins undergo proteolytic priming by the transmembrane protease, serine 2 (TMPRSS2). TMPRSS2 inhibition or knock down reduces ability of SARS-CoV-1 (a related virus to SARS-CoV-2) to infect cells in vitro. Additionally, TMPRSS2 also facilitates entry of influenza A and influenza B into primary human airway cells and type II pneumocytes.

The human TMPRSS2 gene has a 15 bp androgen response element and in humans, androgens are the only known transcription promoters for the TMPRSS2 gene. In a study of androgen-stimulated prostate cancer cells (LNCaP), TMPRSS2 mRNA expression increase was mediated by the androgen receptor. Further, the ACE2 receptor, also critical for SARS-CoV-2 viral infectivity, is affected by male sex hormones with higher activity found in males.

Androgenetic alopecia (AGA), often referred to as male pattern hair loss, is the most common form of hair loss among men. The development of androgenetic alopecia is androgen mediated and is dependent on genetic variants found in the androgen receptor gene located on the X chromosome; thus, it is hypothesized that men with AGA would be more prone to severe COVID-19 disease. The investigators conducted a preliminary observational study of hospitalized COVID-19 patients at two Spanish tertiary hospitals between March 23-April 6, 2020 to test this theory. In total, 41 Caucasian males admitted to the hospitals with a diagnosis of bilateral SARS-CoV-2 pneumonia were analyzed. The mean age of patients was 58 years (range 23-79). Among them, 29 (71%) were diagnosed with AGA (16 (39%) were classified as severe AGA (Hamilton IV or above)) and 12 (29%) did not present clinical signs of AGA. The diagnosis of AGA was performed clinically by a dermatologist. The precise prevalence of AGA among otherwise healthy Spanish Caucasian males is unknown; however, based on published literature, the expected prevalence of a similar age-matched Caucasian population is approximately 31-53%.

Based on the scientific rationale combined with this preliminary observation, the investigators propose to test an anti-androgen as a treatment for patients recently diagnosed with COVID-19.

We have chosen the use of the novel second generation androgen receptor (AR) antagonist proxalutamide as a means for rapid reduction in AR activity. Proxalutamide (GT0918) demonstrates a dual mechanism of action. It is highly effective in inhibiting AR as well as exhibiting pharmacological effects of inducing the down-regulation of AR expression; the mechanism that is not present in bicalutamide and enzalutamide. Additionally, it has been reported that Proxalutamide lowers the expression of ACE2. Both would be beneficial for preventing SARS-CoV-2 entry into lung cells.

This study is intended to explore the possible protective role of anti-androgens in SARS-CoV-2 infection. Provided anti-androgens are effective in reducing the rate of COVID-19 hospitalization, subjects enrolled in this study may experience a lower rate of hospitalization.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 0 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: This study is designed as a prospective, interventional, placebo controlled, double-blinded, randomized parallel assignment study.
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Proxalutamide Treatment for COVID-19 Female Outpatients
Estimated Study Start Date : November 1, 2020
Estimated Primary Completion Date : December 1, 2021
Estimated Study Completion Date : December 1, 2021

Arm Intervention/treatment
Placebo Comparator: Standard Care
Standard of care as determined by the PI
Other: Standard of Care
Standard of care as determined by the PI

Active Comparator: Proxalutamide + Standard Care
Proxalutamide + standard of care as determined by the PI
Drug: Proxalutamide
200 mg q.d.

Primary Outcome Measures :
  1. COVID-19 hospitalization [ Time Frame: 30 days ]
    Percentage of subjects hospitalized due to COVID-19

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Gender Based Eligibility:   Yes
Gender Eligibility Description:   This is a study in female subjects as an extension to NCT04446429 for male subjects
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Female age >=18 years old
  • Laboratory confirmed positive SARS-CoV-2 rtPCR test within 7 days prior to randomization
  • Clinical status on the NIAID COVID-19 Ordinal Scale of 1 or 2 (i.e., not requiring hospitalization)
  • Coagulation: INR<=1.5XULN, and APTT<=1.5XULN
  • Subject (or legally authorized representative) gives written informed consent prior to any study screening procedures
  • Subject (or legally authorized representative) agree that subject will not participate in another COVID-19 trial while participating in this study
  • Not Pregnant or breastfeeding

Exclusion Criteria:

  • Subject enrolled in a study to investigate a treatment for COVID-19 Page 17 of 40
  • Subject taking an anti-androgen of any type including: androgen depravation therapy, 5-alpha reductase inhibitors, etc...
  • Patients who are allergic to the investigational product or similar drugs (or any excipients)
  • Subjects who have malignant tumors in the past 5 years, with the exception of completed resected basal cell and squamous cell skin cancer and completely resected carcinoma in situ of any type
  • Subjects with known serious cardiovascular diseases, congenital long QT syndrome, torsade de pointes, myocardial infarction in the past 6 months, or arterial thrombosis, or unstable angina pectoris, or congestive heart failure which is classified as New York Heart Association (NYHA) class 3 or higher, or left ventricular ejection fraction (LVEF) < 50%, QTcF > 450 ms
  • Subjects with uncontrolled medical conditions that could compromise participation in the study (e.g. uncontrolled hypertension, hypothyroidism, diabetes mellitus)
  • Known diagnosis of human immunodeficiency virus (HIV) , hepatitis C, active hepatitis B, treponema pallidum (testing is not mandatory)
  • Alanine Transaminase (ALT) or Aspartate Transaminase (AST) > 5 times the upper limit of normal.
  • Estimated glomerular filtration rate (eGFR) < 30 ml/min
  • Severe kidney disease requiring dialysis
  • Subject unlikely to return for day 15 site visit for reasons other then remission
  • Subject (or legally authorized representative) not willing or unable to provide informed consent
  • Pregnant or breastfeeding

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04853134

Layout table for location information
Corpometria Institute
Brasilia, Brazil, 70390-150
Sponsors and Collaborators
Applied Biology, Inc.
Layout table for investigator information
Principal Investigator: Flavio Cadegiani, MD Corpometria Institute
Principal Investigator: Carlos Wambier, MD Applied Biology, Inc.
Study Director: Andy Goren, MD Applied Biology, Inc.
Layout table for additonal information
Responsible Party: Applied Biology, Inc. Identifier: NCT04853134    
Other Study ID Numbers: AB-DRUG-SARS-005
First Posted: April 21, 2021    Key Record Dates
Last Update Posted: March 4, 2022
Last Verified: April 2021

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Applied Biology, Inc.:
Additional relevant MeSH terms:
Layout table for MeSH terms
Severe Acute Respiratory Syndrome
Pneumonia, Viral
Respiratory Tract Infections
Virus Diseases
Coronavirus Infections
Coronaviridae Infections
Nidovirales Infections
RNA Virus Infections
Lung Diseases
Respiratory Tract Diseases