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Epidiolex (CBD) in Patients With Biochemically Recurrent Prostate Cancer

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Condition or disease Intervention/treatment Phase
Prostate Cancer Recurrent Prostate Cancer Prostate Adenocarcinoma Drug: Epidiolex Oral Liquid Product Phase 1

Cannabinoids (CBD) have been widely used in medicines for centuries to control pain, nausea or vomiting, and to stimulate appetite, especially in cancer patients. Both cannabinoids receptor 1(CB1) and cannabinoids receptor 2 (CB2) were highly expressed in cultured prostate cancer cells compared to normal prostate cell lines. CBD inhibits tumor growth in xenograft model.

Clinicians have been challenged to improve the treatment of biochemically recurrent (BCR) prostate cancer in which prostatic specific antigen (PSA) rises without radiological or clinical progression years after localized treatment (radical prostatectomy or radiation therapy) with or without hormonal treatment. Approximately 50-90% of men with high-risk prostate cancer will experience a BCR. Based on the abovementioned preclinical observations of CBD’s effect on prostate cancer and its safety data in two non-cancer populations, a phase I study of CBD in men with biochemically recurrent prostate cancer will be conducted.

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Study Type : Interventional (Clinical Trial)
Estimated Enrollment : 18 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase I/Ib Study on the Safety of Epidiolex in Patients With Prostate Cancer With Rising PSA After Localized Therapy With Either Surgery or Radiation
Actual Study Start Date : August 3, 2020
Estimated Primary Completion Date : July 2022
Estimated Study Completion Date : July 2022

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: Male
Gender Based Eligibility: Yes
Gender Eligibility Description: prostate cancer only occurs in male
Accepts Healthy Volunteers: No
  • Completion of localized therapy (prostatectomy or radiotherapy) for prostate adenocarcinoma (either histologically or cytologically confirmed)
  • Biochemical (PSA) recurrence, defined as: * PSA of >= 0.2 ng/ml that has increased above nadir following radical prostatectomy OR * PSA increase of 2.0 ng/ml above post-therapy nadir after radiotherapy NOTE: PSA measured at two consecutive time points (separated by 4 or more weeks) is required in order to demonstrate the requisite increase in PSA
  • Eastern Cooperative Oncology Group (ECOG) performance status = = 1,500/microliters (at baseline [pre-study])
  • Platelets >= 80,000/microliters (at baseline [pre-study])
  • Total bilirubin = = 30 mL/min/1.73 m^2 using the Cockcroft-Gault formula (at baseline [pre-study])
  • Patients with a prior or concurrent malignancy (non-prostate) whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen as determined by the treating physician are eligible
  • Given that worsening of an underlying state of mental depression or suicidal ideation has been reported with Epidiolex, patients should be carefully screened for depression at baseline and if there are indications or a history of depression it is strongly recommended that these patients be closely followed together with behavioral health or psychiatric medical support. Patients with an established diagnosis of depression that, in the assessment of the investigator may make the administration of Epidiolex hazardous, should not be enrolled on this protocol
  • Concurrent use of over-the-counter CBD oil, Marinol or marijuana is not permitted. Patients with a history of current over-the-counter CBD oil, Marinol or marijuana use for any reason are eligible only if they do the following: * Complete a one-week washout period prior to study initiation * Refrain from non-study related CBD oil, Marinol or marijuana use while on-study
  • Ability to understand and the willingness to sign a written informed consent document
  • History of hypersensitivity to Epidiolex (cannabidiol) or sesame seeds (one of the inactive ingredients in Epidiolex)
  • Any radiological evidence of metastatic disease (determined by standard of care computed tomography [CT] scans of abdomen. pelvis, chest, whole body bone scan or Axium positron emission tomography scan). Questionable lesions on bone scan will be confirmed by standard of care methods such as plain X-rays or Axium positron emission tomography scan, if not previously performed
  • Receipt of prior cytotoxic chemotherapy for recurrent prostate cancer
  • Use of androgen deprivation therapy (for example, bicalutamide, flutamide, nilutamide, or leuprolide acetate) concurrently or within the previous 3 months.
  • Uncontrolled intercurrent illness such as active infections. Other illnesses will be evaluated and eligibility status determined at the discretion of the treating physician and the investigator
  • Psychiatric illness/social situations that would limit compliance with study requirements
  • Concomitant use of valproate or clobazam
  • Concurrent use of over-the-counter CBD oil, Marinol or marijuana
  • Epidiolex is a moderate inhibitor of CYP2C19 and a moderate/strong inhibitor of CYP3A4, therefore concurrent use of CYP2C19 substrates is not allowed

Epidiolex (CBD) in Patients With Biochemically Recurrent Prostate Cancer The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing