A Study to Evaluate the Efficacy and Safety of Proxalutamide (GT0918) in Hospitalized COVID-19 Subjects

Suzhou Kintor Pharmaceutical Inc, (Industry)
Overall Status
CT.gov ID
Anticipated Duration (Months)
Patients Per Site
Patients Per Site Per Month

Study Details

Study Description

Brief Summary

This study is an adaptive Phase III randomized double-blind placebo-controlled trial to evaluate the efficacy and safety of Proxalutamide (GT0918) in hospitalized adults diagnosed with COVID-19. The study is a multicenter trial that will be conducted at approximately 80 sites globally. The study will compare GT0918 plus standard of care (SOC) with the placebo plus SOC. Approximately 1030 subjects will be randomized in a 1:1 ratio to either GT0918 plus SOC or placebo plus SOC group.

Condition or DiseaseIntervention/TreatmentPhase
Phase 3

Detailed Description

Coronavirus disease 2019 (COVID-19) emerged in late 2019 and spread rapidly, resulting in a global pandemic.SARS-CoV-2 encodes nonstructural and structural proteins required for its viral life cycle. Among them, the spike glycoprotein plays a pivotal role in SARS-CoV-2 infection by recognizing and attaching to ACE2 transmembrane protein on host cells. Kintor protocol has been designed to evaluate efficacy and safety of GT0918 in hospitalized subjects with COVID-19 illness. The target population of this study are hospitalized subjects with COVID-19 illness with positive SARS-CoV-2 virus test within 72 hours of randomization. The study will evaluate anti-androgen therapy may effectively prevent progression to the more severe form of COVID-19 illness and death, shorten the time to sustained recovery and decrease the mortality rate. This study plans to have around 1030 subjects in the US and other countries/regions will be randomized for GT0918 and the placebo groups, the randomization rate is 1:1. Subject will receive either GT0918 plus standard of care or matched placebo plus standard of care. GT0918/placebo will be given 300mg orally once a day around 30 minutes after meal for 14 days or until discharge per investigators' discretion whichever occurs later, the safety follow up will be until Day 60 ± 3 days. The primary endpoint is time to sustained recovery by Day 30 and the key secondary endpoint is 30-day mortality

Study Design

Study Type:
Anticipated Enrollment :
1030 participants
Intervention Model:
Parallel Assignment
Double (Participant, Investigator)
Primary Purpose:
Official Title:
A Randomized, Double-blind, Placebo-Controlled, Phase III Study to Evaluate the Efficacy and Safety of Proxalutamide (GT0918) in Hospitalized COVID-19 Subjects
Actual Study Start Date :
Sep 30, 2021
Anticipated Primary Completion Date :
Jun 1, 2022
Anticipated Study Completion Date :
Nov 1, 2022

Arms and Interventions

Experimental: Proxalutamide (GT0918) plus standard of care

Participants receive 300mg once daily orally plus standard of care for 14days

Drug: GT0918
300mg once daily orally for 14 days or until discharge per investigators' discretion whichever occurs later
Other Names:
  • Proxalutamide
  • Drug: Standard of care
    Local standard of care per written policies or guidelines
    Other Names:
  • SoC
  • Placebo Comparator: Placebo plus standard of care

    Participants will receive placebo tablets matching Proxalutamide (GT0918) orally plus standard of care for 14 days

    Drug: Standard of care
    Local standard of care per written policies or guidelines
    Other Names:
  • SoC
  • Drug: Matching placebo
    Matching placebo
    Other Names:
  • Placebo
  • Outcome Measures

    Primary Outcome Measures

    1. The time to sustained recovery is evaluated by Day 30. [30 days from enrollment]

      Day of sustained recovery is defined as the first day on which the subject satisfies one of the following three categories from the NIAID ordinal scale and maintains a score of 6, 7 or 8 through Day 30.(6)Hospitalized, not requiring supplemental oxygen - no longer requires ongoing medical care; (7)Not hospitalized, limitation on activities and/or requiring home oxygen; (8)Not hospitalized, no limitations on activities.

    Secondary Outcome Measures

    1. 30-day mortality [30 days from enrollment]

      All cause mortality at 30 days after enrollment

    Eligibility Criteria


    Ages Eligible for Study:
    18 Years and Older
    Sexes Eligible for Study:
    Accepts Healthy Volunteers:
    Inclusion Criteria:
    1. Subject (or legally authorized representative) provides informed consent prior to initiation of any study procedures.

    2. Subject (or legally authorized representative) understands and agrees to comply with planned study procedures.

    3. Male and non-pregnant female subjects with age ≥18 years of age at the time of randomization.

    4. Admitted to a hospital with symptoms suggestive of COVID-19.

    5. Has laboratory-confirmed SARS-CoV-2 infection as determined by PCR or other commercial or public health assay in any specimen, as documented by either of the following:

    • PCR positive in sample collected < 72 hours prior to randomization; OR

    • PCR positive in sample collected ≥ 72 hours prior to randomization, documented inability to obtain a repeat sample (e.g. due to lack of testing supplies, limited testing capacity, results taking > 24 hours, etc) AND progressive disease suggestive of ongoing SARS-CoV-2 infection.

    1. Illness of any duration, and at least one of the following:
    • Radiographic infiltrates by imaging (chest x-ray, CT scan, etc.), OR

    • SpO2 ≤ 93% on room air, OR

    • Requiring supplemental oxygen

    1. Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant, unless they are using highly effective contraception, as shown below, throughout the study and for 3 months after stopping GT0918 treatment. Highly effective contraception methods include:
    • Total Abstinence (when this is in line with the preferred and usual lifestyle of the patient. Periodic abstinence (e.g. calendar, ovulation, symptothermal, post-ovulation methods) and withdrawal are not acceptable methods of contraception, or

    • Use of one of the following combinations (a+b or a+c or b+c):

    1. Use of oral, injected or implanted hormonal methods of contraception or other forms of hormonal contraception that have comparable efficacy (failure rate < 1%), for example hormone vaginal ring or transdermal hormone contraception.

    2. Placement of an intrauterine device (IUD) or intrauterine system (IUS);

    3. Barrier methods of contraception: Condom or Occlusive cap (diaphragm or cervical/vault caps) with spermicidal foam/gel/film/cream/vaginal suppository;

    • Female sterilization (have had prior surgical bilateral oophorectomy with or without hysterectomy) or tubal ligation at least six weeks before taking study treatment. In case of oophorectomy alone, only when the reproductive status of the woman has been confirmed by follow-up hormone level assessment;

    • Male sterilization (at least 6 months prior to screening). For female subjects on the study, the vasectomized male partner should be the sole partner for that subject;

    • In case of use of oral contraception women should have been stable for a minimum of 3 months before taking study treatment. Women are considered post-menopausal and not of childbearing potential if they have had 12 months of natural (spontaneous) amenorrhea with an appropriate clinical profile (e.g. age appropriate, history of vasomotor symptoms) or have had surgical bilateral oophorectomy (with or without hysterectomy) or tubal ligation at least six weeks ago. In the case of oophorectomy alone, only when the reproductive status of the woman has been confirmed by follow up hormone level assessment, is she considered not of childbearing potential;

    1. Regardless of their fertility status, male subjects must agree to either remain abstinent (if this is their preferred and usual lifestyle) or use condoms as well as one additional highly effective method of contraception (less than 1% failure rate) or effective method of contraception with nonpregnant women of childbearing potential partners for the duration of the study and until 90 days after the last dose. A condom is required to be used also by vasectomized men in order to prevent delivery of the drug via seminal fluid.

    2. Agree not to participate in another clinical trial for the treatment of COVID-19 through Day 60 after first dose.

    Exclusion Criteria:
    Subjects are excluded from the study if any of the following criteria apply:
    1. ALT/AST > 3 times the upper limit of normal.

    2. Serum total bilirubin > 1.5 x ULN (upper limit of normal)

    3. Estimated glomerular filtration rate (eGFR) < 30 ml/min (including patients receiving hemodialysis or hemofiltration).

    4. Subjects with significant cardiovascular disease as following:

    1. heart failure NYHA class ≥3 ii. left ventricular ejection fraction <50% iii. those with a history of cardiac arrhythmias, including long QT syndrome.
    1. Neutropenia (absolute neutrophil count <1000 cells/μL) (<1.0 x 10^3/μL).

    2. Lymphopenia (absolute lymphocyte count <200 cells/μL) (<0.20 x 10^3/μL)

    3. Pregnancy or breast feeding

    4. Anticipated discharge from the hospital or transfer to another hospital which is not a study site within 72 hours.

    5. Allergy to any study medication.

    6. Received convalescent plasma or intravenous immunoglobulin [IVIg]) for COVID-19.

    7. Has received or is receiving corticosteroids at high doses (i.e., dexamethasone > 6mg per day or equivalent) within 2 weeks of screening.

    8. Suspected serious, active bacterial, fungal, viral, or other infection (besides COVID-19) that in the opinion of the investigator could constitute a risk when taking investigational product.

    9. Have a history of VTE (deep vein thrombosis [DVT] or pulmonary embolism [PE]) within 12 weeks prior to screening or have a history of recurrent (>1) VTE (DVT/PE).

    10. Subject taking or had taken an anti-androgen of any type including androgen depravation therapy, 5-alpha reductase inhibitors, etc. within 3 months before dosing.

    11. Have participated, within the last 30 days before dosing, in a clinical study involving an investigational intervention. If the previous investigational intervention has a long half-life, 5 half-lives or 30 days, whichever is longer, should have passed.

    12. Subjects with myopathy

    13. Is admitted to Intensive Care Units at randomization

    Contacts and Locations


    SiteCityStateCountryPostal Code
    1Alternative Research Associates LLC.HialeahFloridaUnited States33012
    2Ascension St. John Medical CenterTulsaOklahomaUnited States74104
    3PRX ResearchMesquiteTexasUnited States75149

    Sponsors and Collaborators

    • Suzhou Kintor Pharmaceutical Inc,


    None specified.

    Study Documents (Full-Text)

    None provided.

    More Information


    None provided.
    Responsible Party:
    Suzhou Kintor Pharmaceutical Inc,
    ClinicalTrials.gov Identifier:
    Other Study ID Numbers:
    • GT0918-US-3002
    First Posted:
    Aug 17, 2021
    Last Update Posted:
    Nov 26, 2021
    Last Verified:
    Nov 1, 2021
    Individual Participant Data (IPD) Sharing Statement:
    Plan to Share IPD:
    Studies a U.S. FDA-regulated Drug Product:
    Studies a U.S. FDA-regulated Device Product:
    Keywords provided by Suzhou Kintor Pharmaceutical Inc,
    Additional relevant MeSH terms:

    Study Results

    No Results Posted as of Nov 26, 2021