NCT04337580 · Wake Forest University Health Sciences
Fatty Acid Synthase Inhibition in Castration Refractory Prostate Cancer
(FASN)
What this study is about
The purpose of this research study is to find out what effects (good and bad) omeprazole and cabazitaxel, or omeprazole and docetaxel, has on participants and their condition. Investigators believe omeprazole may help the other medications work.
View original scientific description
The purpose of this research study is to find out what effects (good and bad) omeprazole and cabazitaxel, or omeprazole and docetaxel, has on participants and their condition. Investigators believe omeprazole may help the other medications work.
Interventions
DRUG
Omeprazole 80 mg twice daily
Participants will be treated with omeprazole 80 mg twice daily on Day 0. Within 10 days of starting omeprazole, participants will be treated with standard prostate cancer dosing of every three week docetaxel or cabazitaxel based on package insert. Participants that have only had docetaxel will be retreated with docetaxel along with concurrent omeprazole. Patients that have had both docetaxel and cabazitaxel will be retreated with either cabazitaxel or docetaxel (investigators choice) along with concurrent omeprazole. However investigators encourage investigator to choose cabazitaxel in patients previously treated with cabazitaxel.
Primary outcome measures
Change Radiographic Response - RECIST 1.1
Time frame: Up to approximately 2 years
Response will be defined by RECIST 1.1 as defined by Prostate Cancer Clinical Trials Working Group 3 definition for complete response (CR) - disappearance of all target lesions); partial response (PR) (at least a 30% decrease in the sum of diameters of target lesions); progressive disease (PD) (at least a 20% increase in the sum of diameters or target lesions); stable disease (SD) (neither sufficient shrinkage to qualify for partial response nor sufficient to qualify for progressive disease); or not evaluable (NE).
Change in Bone Metastasis Response - Prostate Cancer Clinical Trials Working Group 3 (PCWG3)
Time frame: Up to approximately 2 years
Response will be defined by Prostate Cancer Clinical Trials Working Group 3 (PCWG3) for complete response (CR), partial response (PR), progressive disease (PD), stable disease (SD) or not evaluable (NE).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Patients must have castrate refractory prostate cancer with prior taxane treatment (docetaxel or cabazitaxel) which was used in the castrate refractory setting
- Cancer Progression as defined by PCWG3
- Age 18 or older.
- ECOG 0, 1, or 2
- Life expectancy of greater than 2 months
- Men must agree to use adequate contraception (barrier method of birth control; abstinence) prior to study entry and for the duration of study participation.
- Ability to understand and the willingness to sign an IRB-approved informed consent document (either directly or via a legally authorized representative).
- Organ \& marrow function as defined below: Absolute neutrophil count \>1,200/mcL Platelets \>75,000/mcL; total bilirubin= within normal institutional limits; AST(SGOT)/ALT(SGPT) \<2.5 X institutional upper limit of normal; creatinine \<2.5 X institutional upper limit of normal
Exclusion criteria
- Patients may not be receiving any other investigational agents.
Where
- Salisbury, North Carolina
- Winston-Salem, North Carolina
Collaborators
National Cancer Institute (NCI)
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Apr 13, 2026 · Source of record for eligibility and locations