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Completed

NCT Number: NCT05764330

Weight Loss Interventions to Reduce Cancer Progression in Prostate Cancer Patients Under Active Surveillance

This clinical trial examines weight loss interventions in reducing cancer progression in prostate cancer patients under active surveillance. Intensive lifestyle interventions that recommend modest reductions in daily caloric intake (i.e. continuous calorie energy reduction [CER]) are the gold-standard for weight loss, and have been tested in cancer survivors, including prostate cancer patients. However, few interventions have been developed for low-risk prostate cancer patients on active surveillance. Intermittent fasting (IF) may be superior to CER in the context of prostate cancer progression given its dual role in weight loss and metabolic switching from the use of glucose as a fuel source to the use of fatty acids and ketone bodies. This study may help researchers determine which weight loss strategies can reduce their risk of prostate cancer recurrence, and other negative health effects of being overweight or obese.

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Key information

Conditions

Prostate Carcinoma Genital Diseases Genital Diseases, Male Genital Neoplasms, Male Male Urogenital Diseases Neoplasms Neoplasms by Site Prostatic Diseases Prostatic Neoplasms Urogenital Diseases Urogenital Neoplasms

Age range

18 year and older

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Roswell Park Cancer Institute

Buffalo, New York, 14263, United States

About this study

PRIMARY OBJECTIVES:

I. Develop two evidence-based behavioral weight loss intervention programs (IF and CER) with a goal to cause weight loss in prostate cancer (PCa) patients on active surveillance (AS).

II. Determine the initial comparative effectiveness of two intervention programs (IF and CER) on weight loss and PCa progression outcomes.

SECONDARY OBJECTIVE:

I. Compare the effects of the interventions on biomarkers underlying obesity and PCa to provide mechanistic insights and potential surrogate biomarkers for PCa prognosis.

OUTLINE: Patients are randomized to 1 of 2 arms.

ARM I: Patients undergo the CER intervention consisting of remote lessons containing information and behavioral strategies about weight loss, session with study interventionist to review lessons, and self-monitoring of body weight, physical activity and dietary intake. Patients also undergo collection of blood samples throughout the trial.

ARM II: Patients undergo IF intervention consisting of remote lesson containing information and behavioral strategies about fasting, session with study interventionist to review lessons, and self-monitoring of fasting. Patients will undergo fasting 2 days per week and eat according to the National Cancer Institute (NCI) guidelines the remaining 5 days. Patients also undergo collection of blood samples throughout the trial.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age 18 years old or older (no upper limit)
  • Body mass index (BMI) >= 25 kg/m^2
  • English speaking
  • Not currently on weight loss medications
  • Prostate cancer patients who are under active surveillance (including observation) and actively followed at Roswell Park
  • Not under active treatment for other cancer diagnosis
  • Free of medical problems that might contraindicate participation in a behavioral weight reduction program containing an exercise component
  • Has not lost at least 10% of their body weight in the last 6 months
  • Has not had bariatric surgery in the last 10 years
  • Able to walk unassisted and continuously for 10 minutes
  • Participant must understand the investigational nature of this study and sign an Independent Ethics Committee/Institutional Review Board approved written informed consent form prior to receiving any study related procedure

Exclusion criteria

  • Unable to consent
  • Unwilling or unable to follow protocol requirements
  • Unable to complete study measures in English
  • Adults who have had a myocardial infarction (heart attack) or stroke without medical clearance from their primary care physician to participate in the study
  • Adults who currently have type 1 or type 2 diabetes without medical clearance from their primary care physician to participate in the study
  • History of partial or radical prostatectomy

Treatment and study plan

Biospecimen Collection

Procedure

Undergo collection of blood samples

Other names: Biological Sample Collection, Biospecimen Collected, Specimen Collection

Dietary Intervention

Other

Undergo CER intervention

Other names: Dietary Modification, intervention, dietary, Nutrition Intervention, Nutrition Interventions, Nutritional Interventions

Fasting

Behavioral

Undergo fasting

Other names: Fast

Primary outcomes

  1. Change in Body weight

    Time frame: Up to 6 months

    Weight will be measured using a body composition monitor.

  2. Changes in prostate cancer (PCa) progression

    Time frame: Up to 6 months

    Will assess changes in PCa progression indicated by serum prostate specific antigen (PSA) doubling time, and biopsy tumor upgrading and/or upstaging if required clinically, between the timepoints prior and post to the intervention. The timing of the intervention and data collection visits will be scheduled to correspond with the PCa patient's regular management check-up with their physician to allow their scheduled PSA test fall within at least a 6-month time window. For patients if prostate biopsy per clinical guidance is scheduled within 6 months after the intervention, the results from the biopsy post to the intervention as well as the nearest biopsy prior to the intervention will be requested. PSA test results (level and doubling time) and pathology reports on biopsies tissues (stage and grade) will be requested from the Biomedical Research Informatics Shared Resource for both baseline and follow-up visits and defined based on clinical criteria.

Secondary outcomes

  1. Dietary intake

    Time frame: Up to 6 months

    Will confirm the extent changes in body weight are due to changes in caloric intake. Dietary intake will be assessed by the interview administered Nutrition Data System for Research.

  2. Physical activity

    Time frame: Up to 6 months

    Will be assessed using the Paffenbarger Physical Activity Questionnaire (PAQ). The PAQ provides an estimate of calories expended per week in overall leisure time activity and in activities of light (5 kcal/min), medium (7.5 kcal/min) and high (19 kcal/min) intensity.

  3. Change from baseline in Prostate Cancer related biomarkers

    Time frame: Up to 6 months

    Correlation of weight loss and PCa biomarkers.

  4. Change in Urinary functions

    Time frame: Up to 6 months

    urinary function changes will be tracked using a validated questionnaire, the International Prostate Symptom Score

  5. Improvement of Quality of life

    Time frame: Up to 6 months

    Self-reported outcomes routinely collected at each follow up clinic visit using validated questionnaire - UCLA PCI for quality of life.The UCLA PCI domain is scored on a scale of 0-100 points with higher values representing better outcomes.

  6. Change in Sexual functions

    Time frame: Up to 6 months

    Sexual health inventory for men (SHIM). The total score is obtained by adding all five item scores, and can range from 5 to 25. Higher scores indicate higher level of sexual function and less erectile dysfunction.

Sponsors and collaborators

Lead sponsor

Roswell Park Cancer Institute

Other

Registry information

Important dates

Study start
2024
Primary completion
2025
Study completion
2025
First posted
Mar 10, 2023
Registry last updated
Aug 6, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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