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Trial record 1 of 1 for:    gt0918
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Safety, Tolerability, and PK of GT0918 (Proxalutamide) in Subjects With Metastatic Castrate Prostate Cancer

This study is currently recruiting participants.
See Contacts and Locations
Verified February 2017 by Suzhou Kintor Pharmaceutical Inc,
Sponsor:
Information provided by (Responsible Party):
Suzhou Kintor Pharmaceutical Inc,
ClinicalTrials.gov Identifier:
NCT02826772
First received: June 23, 2016
Last updated: February 28, 2017
Last verified: February 2017
  Purpose

This study is an open-label, non-randomized, dose escalation study in subjects with metastatic castrate resistant prostate cancer (mCRPC) who progressed after both hormonal therapy (abiraterone or enzalutamide) and chemotherapy (docetaxel), or cannot tolerate either or both therapies.

There will be two treatment phases:

Phase 1 (dose escalation stage): Multiple dose escalations of GT0918 (proxalutamide) to establish safety and tolerability.

Phase 2 (dose expansion stage): Identify two dose levels from Phase 1 to further evaluate the safety, tolerability and antitumor activity of GT0918 (proxalutamide); subjects will be randomized into the 2 treatment arms.


Condition Intervention Phase
Metastatic Castrate Resistant Prostate Cancer (mCRPC) Drug: GT0918 Phase 1 Phase 2

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase 1/2, Multi-Center, Open-Label, Two-Stage Study to Evaluate the Safety, Tolerability, and Pharmacokinetics of GT0918 in Subjects With Metastatic Castrate Resistant Prostate Cancer (mCRPC)

Resource links provided by NLM:


Further study details as provided by Suzhou Kintor Pharmaceutical Inc,:

Primary Outcome Measures:
  • dose-limiting toxicities (DLTs) [ Time Frame: 1 month ]
    abnormal laboratory value

  • maximum tolerated dose (MTD),biological dose or minimal effective dose, (MED), and recommended Phase 2 dose(s) (RP2D). [ Time Frame: 1 month ]
    50 mg, 100 mg, 200 mg, 300 mg, 400 mg or 500 mg of GT0918


Secondary Outcome Measures:
  • maximum concentration (Cmax) [ Time Frame: 6 months ]
    Pharmacokinetics

  • time that maximum concentration is observed (tmax) [ Time Frame: 6 months ]
    Pharmacokinetics

  • area under the concentration time-curve from time zero to infinity (AUC0∞) [ Time Frame: 6 months ]
    Pharmacokinetics

  • area under the plasma concentration-time curve from time zero hours to time (t hrs), (AUC0-t) [ Time Frame: 6 months ]
    Pharmacokinetics

  • area under the plasma concentration-time curve from time zero hours to 24 hours (AUC0-24) [ Time Frame: 6 months ]
    Pharmacokinetics

  • terminal elimination rate constant (λz) [ Time Frame: 6 months ]
    Pharmacokinetics

  • terminal elimination half life (t½) [ Time Frame: 6 months ]
    Pharmacokinetics

  • volume of distribution (Vz) [ Time Frame: 6 months ]
    Pharmacokinetics

  • volume of plasma cleared of the drug per unit time (C) [ Time Frame: 6 months ]
    Pharmacokinetics

  • circulating tumor deoxyribonucleic acid (ctDNA) [ Time Frame: 6 months ]
    antitumor activities

  • circulating messenger ribonucleic acid (mRNA) [ Time Frame: 6 months ]
    antitumor activities

  • prostate-specific antigen (PSA) [ Time Frame: 6 months ]
    biomarker


Estimated Enrollment: 93
Study Start Date: February 2016
Estimated Study Completion Date: December 2018
Estimated Primary Completion Date: December 2018 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Phase 1 GT0918 level 1
generic name: not applicable dosage form: tablet dosage: oral dosage to be determined dosage frequency: daily dosage duration: 6 months
Drug: GT0918
anti-tumor activity
Other Names:
  • androgen receptor antagonist
  • proxalutamide
Experimental: Phase 2 GT0918 level 1
generic name: not applicable dosage form: tablet dosage: oral dosage to be determined dosage frequency: daily dosage duration: 6 months
Drug: GT0918
anti-tumor activity
Other Names:
  • androgen receptor antagonist
  • proxalutamide

Detailed Description:

The starting dose cohort in the dose escalation stage will be 50 mg GT0918 (proxalutamide) PO once daily administered to 3 subjects in a fasted state. The next dose cohort in the dose escalation stage will be 100 mg PO once daily administered to 6 subjects in a fasted state with escalation to the following dose levels, each having a total of at least 6 subjects per cohort: 200 mg, 300 mg, 400 mg, and 500 mg. Dose escalation can occur after a minimum of 3 subjects in the 50 mg dose level have completed 28 days of treatment, no DLTs have occurred and the safety review of the cohort has been performed. Dose escalation in the remaining cohorts can occur after a minimum of 6 subjects have completed 28 days of treatment, either no DLTs or ≤1 subject has a DLT, and the safety review of the cohort has been performed.

During the dose escalation stage, all subjects will take GT0918 oral administration once daily on an empty stomach (fasted state) for 28 consecutive days. The first dosing cycle will be followed by at least a 7-day off-treatment period (for PK analysis); however, no off-treatment period will be scheduled between subsequent treatment cycles. If individual subjects on GT0918 show an objective response or stable disease (SD) according to Response Evaluation Criteria in Solid Tumors (RECIST v1.1) criteria and who is expected to benefit from continued treatment in the opinion of the investigator, they may continue to receive additional cycles of GT0918 in the absence of untoward or serious toxicity; however, no subject is permitted to start a subsequent cycle after each bi-monthly disease evaluation until it is confirmed that disease progression has not occurred. A subject without disease progression may continue GT0918 treatment with the approval of the investigator; treatment can continue until a subject experiences an intolerable adverse event (AE) or disease progression, withdraws consent or until termination of the study by the sponsor. A total of 6 cycles of GT0918 is planned; however, subjects without progressive disease (PD) have the option to continue with their assigned dose in a 6-month Extension Study. At the end of total 6 cycles of GT0918 or additional extension cycles, a post-treatment period of 4 weeks will commence that concludes with an end-of-study visit.

The recommended Phase 2 dose (RP2D) will be based on the safety, tolerability, pharmacodynamic, and/or anti-tumor activities, etc. of GT0918 from the dose escalation stage.

  Eligibility

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  1. Written informed consent obtained prior to any study-related procedure being performed.
  2. Subjects at least 18 years of age or older at the time of consent.
  3. Histologically confirmed metastatic castrate resistant cancer (mCRPC) who progressed after both hormonal therapy (abiraterone or enzalutamide) and chemotherapy (docetaxel, for example); or cannot tolerate either or both of these classes of therapies.
  4. Ongoing androgen deprivation therapy with a luteinizing hormone-releasing hormone (LHRH) "super-agonist" or antagonist, or bilateral orchiectomy and serum testosterone level < 50 ng/dL (< 0.5 ng/mL, < 1.7 nmol/L) at screening.
  5. Metastatic disease documented by computed tomography (CT)/magnetic resonance imaging (MRI) or bone scan.
  6. Progressive disease despite ongoing androgen deprivation or chemotherapy. Progressive disease is defined by 1 or more of the following criteria:

    • Subjects with a rising PSA value > 2 ng/mL in at least 2 measurements, at least 1 week apart. If the confirmatory PSA value is less than the screening PSA value, then an additional test for the rising PSA is required to document progression.
    • Subjects with measurable disease, progression defined by Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 criteria.
    • Subjects with metastatic bone disease, progression defined by 2 or more new lesions in a radionuclide bone scan.
  7. ECOG performance status of 0-2 (dose escalation phase); ECOG performance status of 0-1 (expansion phase).
  8. Screening blood counts of the following:

    • Absolute neutrophil count ≥ 1500/μL
    • Platelets ≥ 100,000/μL
    • Hemoglobin > 9 g/dL
  9. Screening chemistry values of the following:

    • Alanine aminotransferase (ALT) and aspartate transaminase (AST) ≤ 2.5 × upper limit of the normal reference range (ULN)
    • Total bilirubin ≤ 2 × ULN
    • Creatinine ≤ 1.5 × ULN
    • Albumin > 2.8 g/dL.
  10. At screening, life expectancy of at least 3 months.
  11. Subjects whose partners are women of childbearing potential (WOCBP) must use an adequate method of birth control while on study drug and at least for 3 weeks after discontinuation of study drug.
  12. Subject is willing and able to comply with all protocol required visits and assessments.

Exclusion Criteria:

  1. Subjects with life expectancy less than 3 months.
  2. Discontinuation of bicalutamide or nilutamide less than 6 weeks, and other antiandrogens less than 4 weeks, abiraterone less than 3 weeks, prior to the start of study medication.
  3. Prior chemotherapy, radiation, sipuleucel-T or other experimental immunotherapy less than 4 weeks prior to the start of study medication.
  4. Prior chemotherapies more than 2 lines (Phase II part only) .
  5. Ongoing acute treatment-related toxicity associated with a previous therapy greater than grade 1 except for grade 2 alopecia or neuropathy.
  6. History of impaired adrenal gland function (eg, Addison's disease, Cushing's syndrome).
  7. Known gastrointestinal disease or condition that affects the absorption of GT0918.
  8. History of congestive heart failure New York Heart Association (NYHA) class III or IV or uncontrolled hypertension at screening.
  9. History or family history of long QT syndrome.
  10. History of other malignancy within the previous 3 years, except basal cell or squamous cell carcinoma, or non-muscle invasive bladder cancer.
  11. Use of systemic glucocorticoid (eg, prednisone, dexamethasone) within 14 days prior to the start of study medication.
  12. Co-administration of CYP3A4 ligands that serve as substrates or induce or inhibit the enzyme.
  13. Prior use of any herbal products known to decrease PSA levels (eg, PC-SPES or saw palmetto) within 30 days prior to the start of study medication.
  14. Major surgery within 30 days prior to the start of study medication.
  15. Blood transfusion (including blood products) within 1 week of screening.
  16. Serious persistent infection within 14 days prior to the start of study medication.
  17. Serious concurrent medical condition including CNS disorders.
  18. Previous history of difficulty swallowing capsules.
  19. Known hypersensitivity to GT0918 or its excipients.
  20. Any condition that, in the opinion of the investigator, would impair the subject's ability to comply with study procedures.
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT02826772

Contacts
Contact: Sheri Pudlosky Brierley 484-998-8315 sbrierley@accelovance.com

Locations
United States, Nevada
Comprehensive Cancer Centers of Nevada Recruiting
Las Vegas, Nevada, United States, 89169
Contact: Sheri Pudlosky Brierley    484-998-8315    sbrierley@accelovance.com   
Principal Investigator: Nicholas Vogelzang, MD         
United States, New Jersey
Rutgers University Recruiting
New Brunswick., New Jersey, United States, 08901
Contact: Sheri Pudlosky Brierley    484-998-8315    sbrierley@accelovance.com   
Principal Investigator: Mark Stein, MD         
United States, New York
North Shore Hematology Oncology Associates Recruiting
East Setauket, New York, United States, 11733
Contact: Sheri Pudlosky Brierley    484-998-8315    sbrierley@accelovance.com   
Principal Investigator: Jeffrey Vacirca, MD         
United States, Ohio
Gabrail Cancer Center Research Recruiting
Canton, Ohio, United States, 44718
Contact: Sheri Pudlosky Brierley    484-998-8315    sbrierley@accelovance.com   
Principal Investigator: Nashat Gabrail, MD         
Sponsors and Collaborators
Suzhou Kintor Pharmaceutical Inc,
  More Information

Responsible Party: Suzhou Kintor Pharmaceutical Inc,
ClinicalTrials.gov Identifier: NCT02826772     History of Changes
Other Study ID Numbers: GT0918-US-1001
Study First Received: June 23, 2016
Last Updated: February 28, 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Additional relevant MeSH terms:
Prostatic Neoplasms
Genital Neoplasms, Male
Urogenital Neoplasms
Neoplasms by Site
Neoplasms
Genital Diseases, Male
Prostatic Diseases
Androgen Receptor Antagonists
Androgen Antagonists
Hormone Antagonists
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs

ClinicalTrials.gov processed this record on September 21, 2017