GTx
Status and phase
Conditions
Treatments
About
The purpose of this study is to determine if GTx-024 is effective and safe in the treatment of patients with advanced, androgen receptor positive triple negative breast cancer (AR+ TNBC).
Enrollment
Sex
Ages
Volunteers
Inclusion criteria
Able and willing to give voluntary, written and signed, informed consent
Women ≥ 18 years of age
Women with TNBC who have received at least one but no more than two prior chemotherapy regimens for TNBC
Confirmation of AR+ (defined as ≥ 10% nuclear AR staining by immunohistochemistry [IHC]) TNBC in either the primary or metastatic lesion, assessed during the screening period by a local laboratory or by medical history
TNBC confirmed by medical history as: human epidermal growth factor receptor 2 [HER2]-negative (confirmed by IHC 0, 1+ regardless of fluorescence in situ hybridization [FISH] ratio; IHC 2+ with FISH ratio lower than 2.0 or HER2 gene copy less than 6.0; FISH ratio of 0, indicating gene deletion, when positive and negative in situ hybridization [ISH] controls are present); estrogen receptor (ER) negative (confirmed as ER expression less than or equal to 1% positive tumor nuclei); progesterone receptor negative (confirmed as progesterone receptor expression less than or equal to 1% positive tumor nuclei)
Availability of paraffin embedded or formalin fixed tumor tissue; OR, a minimum of 10 and up to 20 slides of archived tumor tissue for central laboratory confirmation of AR status and molecular subtyping. Metastatic tumor tissue is preferred when possible
Subjects must have either measurable disease or bone-only non-measurable disease, evaluable according to RECIST 1.1
Subjects with bone metastases should be treated with intravenous bisphosphonates or subcutaneous denosumab (or investigator preferred standard of care) prior to and during the trial, unless there is a contraindication or subject intolerance to these therapies
Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 at the time of screening and enrollment
Negative pregnancy test in women of childbearing potential (premenopausal or less than 12 months of amenorrhea post-menopause, and who have not undergone surgical sterilization), no more than 7 days before the first dose of study treatment
For women of childbearing potential who are sexually active, agreement to use a highly effective, non-hormonal form of contraception during and for at least 6 months after completion of study treatment; OR, a fertile male partner willing and able to use effective non-hormonal of contraception (barrier method of contraception in conjunction with spermicidal jelly, or surgical sterilization) during and for at least 6 months after completion of study treatment
Adequate organ function as shown by:
Able to swallow capsules
Any toxicity from prior chemotherapy has resolved or Grade 1 (NCI-CTCAE, Version 4.0)
Exclusion criteria
Life expectancy < 4 months;
Subjects with radiographic evidence of central nervous system (CNS) metastases as assessed by computerized tomography (CT) or magnetic resonance imaging (MRI) that are not well controlled (symptomatic or requiring control with continuous corticosteroid therapy [e.g., dexamethasone]). Note: Subjects with CNS metastases are permitted to participate in the study if the CNS metastases are medically well controlled prior to screening (as assessed by the Investigator) after receiving local therapy (irradiation, surgery, etc.)
Radiotherapy within 14 days prior to first dose of study treatment
Have, in the judgment of the Investigator, a clinically significant concurrent illness or psychological, familial, sociological, geographical, or other concomitant condition that would not permit adequate follow-up and compliance with the study protocol
Positive hepatitis B virus (HBV) and/or hepatitis C virus (HCV) infection at screening
Positive human immunodeficiency virus (HIV) infection at screening
Prior treatment with any anti-androgens, including but not limited to, enzalutamide and bicalutamide
Major surgery within 28 days of the first dose of study treatment
Be currently taking or have previously taken testosterone, methyltestosterone, oxandrolone (Oxandrin®), oxymetholone, danazol, fluoxymesterone (Halotestin®), testosterone-like agents (such as dehydroepiandrosterone, androstenedione, and other androgenic compounds, including herbals), or anti-androgens
Treatment with any of the following hormone replacement therapies, unless discontinued at least 14 days prior to the first dose of study treatment:
Treatment with any investigational agent within 28 days before the first dose of study treatment
Another active cancer (excluding adequately treated basal cell carcinoma or cervical intraepithelial neoplasia [CIN]/cervical carcinoma in situ or melanoma in situ). Prior history of other cancer is allowed as long as there is no active disease within the prior 5 years
Subject has a concomitant medical condition that precludes adequate study treatment compliance or assessment, or increases subject risk, in the opinion of the Investigator, such as but not limited to:
Current treatment with intravenous bisphosphonate or denosumab with elevated serum calcium corrected for albumin or ionized calcium levels outside institutional normal limits at screening
History of non-compliance to medical regimens
Subjects unwilling to or unable to comply with the protocol procedures as assessed by the Investigator
Concurrent participation in another therapeutic clinical trial
Primary purpose
Allocation
Interventional model
Masking
32 participants in 1 patient group
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Data sourced from clinicaltrials.gov
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