Testing the Effects of Low Dose Apalutamide on Prostate-Specific Antigen (PSA) Levels in Men Scheduled for Removal of the Prostate Gland
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|ClinicalTrials.gov Identifier: NCT04530552|
Recruitment Status : Recruiting
First Posted : August 28, 2020
Last Update Posted : December 6, 2022
|Condition or disease||Intervention/treatment||Phase|
|Localized Prostate Carcinoma Prostate Adenocarcinoma Stage I Prostate Cancer AJCC v8 Stage II Prostate Cancer AJCC v8 Stage IIIA Prostate Cancer AJCC v8 Stage IIIB Prostate Cancer AJCC v8||Drug: Apalutamide Procedure: Biospecimen Collection Other: Quality-of-Life Assessment||Phase 2|
I. To determine the effects of low dose apalutamide on circulating levels of prostate specific antigen (PSA).
I. To determine the effect of low dose apalutamide on:
Ia. Reversibility of testosterone levels 7-14 days post intervention; Ib. Post-intervention plasma trough apalutamide concentration; Ic. Health-related quality of life.
I. To determine the effects of apalutamide on intra-prostatic immune cell infiltration and Gleason score as exploratory endpoints.
Patients receive apalutamide orally (PO) on study. Patients also undergo collection of blood samples throughout the study.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||40 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||Clinical Study of Bioactivity of Low Dose Apalutamide in Prostate Cancer Patients Scheduled for Prostatectomy|
|Actual Study Start Date :||June 1, 2021|
|Estimated Primary Completion Date :||August 31, 2024|
|Estimated Study Completion Date :||August 31, 2024|
Experimental: Treatment (apalutamide)
Patients receive apalutamide PO on study. Patients also undergo collection of blood samples throughout the study.
Procedure: Biospecimen Collection
Undergo collection of blood samples
Other: Quality-of-Life Assessment
Other Name: Quality of Life Assessment
- Change in prostate specific antigen (PSA) levels [ Time Frame: Baseline up to end of treatment ]The proportion of participants with >= 25% decline in PSA levels (from baseline to end-of-intervention) will be reported along with the 97.5% credible interval for the response rate based on the posterior distribution of the response rate derived from a non-informative prior for the response rate, which is consistent with the Bayesian approach.
- Reversibility of testosterone levels [ Time Frame: Baseline, and at 7-14 days post-intervention (post-operative) ]The post-operative testosterone levels will be compared with the levels at baseline and end-of-intervention within each dose cohort. Paired t test will be performed on the changes in testosterone to evaluate the effects of low dose apalutamide for each dose group. A 95% CI will be reported for each of the two dose groups.
- Post-intervention plasma trough apalutamide concentrations [ Time Frame: Up to 7-14 days after prostate surgery ]Post-intervention plasma trough apalutamide concentrations will be quantified by a sensitive and specific liquid chromatography mass spectrometry assay. The correlation between plasma trough apalutamide and the change of PSA levels will be assessed. Pearson correlation coefficient will be derived to evaluate the correlation between the plasma trough apalutamide levels and the change of PSA levels. A 95% CI will be reported for each of the two dose groups.
- Health-related quality of life (HRQOL) [ Time Frame: Baseline, until end of intervention ]HRQOL will be assessed by a validated questionnaire (Expanded Prostate Cancer Index Composite for Clinical Practice [EPIC-CP]) to allow for efficient and accurate measurement of urinary incontinence, urinary irritation, bowel, sexual, and hormonal HRQOL in prostate cancer patients. Changes (from baseline to end-of-intervention) in the overall score and subscore for each measure will be assessed for each dose group. Changes in EPIC-CP (from baseline to end-of-intervention) in the overall score and sub-score for each measure will be derived and paired t test will be performed to evaluate the change for each dose group. A 95% CI will be reported for each of the two dose groups.
- Gleason score of pre- and post-intervention tumor(s) with matched location [ Time Frame: Up to 7-14 days after prostate surgery ]Changes (from most recent biopsy to prostatectomy) in the Gleason score of pre- and post-intervention tumor(s) with matched location will be assessed for each dose group. Linear mixed effects model with a random intercept accounting within-subject dependence will be performed to compare the change in Gleason score of pre- and post-intervention tumor(s) with matched location since a participant can have more than one tumor. A 95% CI will be reported for each of the two dose groups.
- Intra-prostatic immune cell infiltration [ Time Frame: Up to 7-14 days after prostate surgery ]CD8+, CD4+, and CD56+ positive cells in the prostate tissues will be assessed by immunohistochemistry. Changes (from most recent biopsy to prostatectomy) in these immune cells will be assessed for each dose group. Changes in immune cell infiltration will also be assessed in a subgroup of participants where materials are available from pre- and post-intervention tumor(s) with matched location. Changes (from most recent biopsy to prostatectomy) in these immune cells will be assessed for each dose group by paired t test. A 95% CI will be reported for each of the two dose groups.
- Effects of tobacco/alcohol use [ Time Frame: Baseline, every 7-10 during study, within 3 days prior to surgery, and 7-14 days after surgery ]Will be assessed by examining the associations between tobacco and alcohol consumption and the effects of apalutamide on the study endpoints.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04530552
|United States, Arizona|
|University of Arizona Cancer Center - Prevention Research Clinic||Recruiting|
|Tucson, Arizona, United States, 85719|
|Contact: Hsiao-Hui (Sherry) Chow 520-626-3358 firstname.lastname@example.org|
|Principal Investigator: Hsiao-Hui (Sherry) Chow|
|United States, California|
|USC / Norris Comprehensive Cancer Center||Recruiting|
|Los Angeles, California, United States, 90033|
|Contact: Mike M. Nguyen 323-865-3041 Mike.Nguyen@med.usc.edu|
|Principal Investigator: Mike M. Nguyen|
|UC San Diego Medical Center - Hillcrest||Not yet recruiting|
|San Diego, California, United States, 92103|
|Contact: John K. Parsons 858-822-7874 K0parsons@mail.ucsd.edu|
|Principal Investigator: John K. Parsons|
|United States, District of Columbia|
|George Washington University Medical Center||Not yet recruiting|
|Washington, District of Columbia, United States, 20037|
|Contact: Michael J. Whalen 202-741-3121 email@example.com|
|Principal Investigator: Michael J. Whalen|
|United States, Maryland|
|Johns Hopkins University/Sidney Kimmel Cancer Center||Recruiting|
|Baltimore, Maryland, United States, 21287|
|Contact: Christian P. Pavlovich 410-550-3338 firstname.lastname@example.org|
|Principal Investigator: Christian P. Pavlovich|
|NCI - Center for Cancer Research||Recruiting|
|Bethesda, Maryland, United States, 20892|
|Contact: Peter A. Pinto 301-496-6353 email@example.com|
|Principal Investigator: Peter A. Pinto|
|Principal Investigator:||Juan Chipollini||University of Arizona Cancer Center - Prevention Research Clinic|