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Testing the Effects of Exercise on Colorectal Cancer Development After Treatment With Pelvic Radiation Therapy for Prostate Cancer

The Effects of Exercise on Colorectal Cancer Promotion Following Pelvic Radiotherapy for Prostate Cancer

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07790718
Enrollment
30
Registered
2026-08-27
Start date
2026-12-16
Completion date
2027-06-12
Last updated
2026-08-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colon Polyp, Colorectal Carcinoma, Localized Prostate Carcinoma, Stage I Prostate Cancer AJCC v8, Stage II Prostate Cancer AJCC v8, Stage III Prostate Cancer AJCC v8

Brief summary

This clinical trial evaluates the effects of exercise therapy on signs of colorectal cancer in colon tissue and blood in people who completed pelvic radiation therapy for prostate cancer. People who get radiation in the pelvic area have a higher chance of developing colon cancer years later. This is because radiation can cause new mutations and inflammation. Research shows that exercise lowers colon cancer risk by about 30%. The results of this trial may help researchers better understand how exercise affects the development of colorectal cancer in patients who were treated with pelvic radiation therapy for prostate cancer.

Detailed description

PRIMARY OBJECTIVE: I. Determine the effects of exercise on mitigating molecular features in collected normal mucosa sample and any polyps identified. SECONDARY OBJECTIVES: I. Study longitudinal changes in predictors of colon cancer risk. II. Evaluate accrual and retention rates, as well as exercise compliance and safety. EXPLORATORY OBJECTIVE: I. Bank tissue from standard of care colonoscopies/flex sigmoidoscopies for exploratory biological analyses (e.g., immune cell infiltration, mutational signature analysis). OUTLINE: STAGE 1: Patients undergo standard of care (SOC) colonoscopy/flex sigmoidoscopy with tissue biopsy, have their Apple Health physical activity data collected and analyzed, and complete a survey. Patients determined to have low physical activity over the previous 12 months may proceed to Stage 2. STAGE 2: Patients participate in individualized walking sessions over 10-70 minutes each, 5 times per week (225 minutes total per week), for 6 months. Patients also undergo collection of a blood sample on study and undergo SOC colonoscopy/flex sigmoidoscopy with tissue biopsy during follow-up. After completion of study intervention, patients are followed up within 2 weeks, or up to 3 months, for completion of follow-up SOC colonoscopy/flex sigmoidoscopy.

Interventions

OTHERAerobic Exercise

Participate in individualized walking sessions

PROCEDUREBiopsy Procedure

Undergo biopsy

PROCEDUREBiospecimen Collection

Undergo collection of blood sample

PROCEDUREColonoscopy

Undergo SOC colonoscopy

OTHERData Collection

Undergo collection of Apple Health data

OTHERPhysical Performance Testing

Ancillary studies

OTHERQuestionnaire Administration

Ancillary studies

PROCEDURESigmoidoscopy

Undergo SOC flex sigmoidoscopy

OTHERSurvey Administration

Complete survey

Sponsors

City of Hope Medical Center
Lead SponsorOTHER
National Cancer Institute (NCI)
CollaboratorNIH

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
SUPPORTIVE_CARE
Masking
NONE

Eligibility

Sex/Gender
MALE
Age
40 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

* Documented informed consent of the participant and/or legally authorized representative * Assent, when appropriate, will be obtained per institutional guidelines * Agreement to allow the use of archival tissue from diagnostic tumor biopsies * If unavailable, exceptions may be granted with study principal investigator (PI) approval * Age: 40-80 years * Body mass index (BMI): \> 25 kg/m\^2 * Has Apple Health application (app) on personal device with valid iOS operating software (i.e., iOS 15.0 or higher) * Has a registered MyChart/MyCityofHope account (or be willing to register for one) and the app downloaded onto personal device * Ability to read and understand English to review MyChart/MyCityofHope on-screen instructions to sync and share Apple Health data, and for safety during exercise testing * Previously diagnosed with localized prostate cancer * Completed pelvic radiotherapy 12-20 months ago * Presence of abnormalities (e.g., polyps, lesions) in the colon * Assessed for exercise participation as per pre-screening clearance via the Physical Activity Readiness Questionnaire (PAR-Q+) (stage 2 only) * Low physical activity, defined by \< 5,000 steps/day over the last 12 months as per Apple Health data (stage 2 only)

Exclusion criteria

* Enrollment in any other program (e.g., weight loss program) that may alter the impact of exercise on outcomes * Presence of any other concurrent, actively treated malignancy * Distant metastatic malignancy of any kind * Any other condition that would, in the Investigator's judgment, contraindicate the patient's participation in the clinical study due to safety concerns with clinical study procedures * Prospective participants who, in the opinion of the investigator, may not be able to comply with all study procedures (including compliance issues related to feasibility/logistics)

Design outcomes

Primary

MeasureTime frameDescription
Colon tissue molecular profiles - Whole genome sequencingFrom baseline up to completion of follow-up colonoscopy/flex sigmoidoscopy (up to 3 months)Whole genome sequencing will be measured in colonic mucosa. Will be compared from baseline to 6 months post-intervention using the paired Wilcoxon signed rank test and McNemar's test for numeric and categorical features, respectively.
Colon tissue molecular profiles - Single-cell ribonucleic acid sequencingFrom baseline up to completion of follow-up colonoscopy/flex sigmoidoscopy (up to 3 months)Single-cell ribonucleic acid sequencing will be measured in colonic mucosa. Will be compared from baseline to 6 months post-intervention using the paired Wilcoxon signed rank test and McNemar's test for numeric and categorical features, respectively.
Colon tissue molecular profiles - Associated molecular assaysFrom baseline up to completion of follow-up colonoscopy/flex sigmoidoscopy (up to 3 months)Associated molecular assays will be measured in colonic mucosa. Will be compared from baseline to 6 months post-intervention using the paired Wilcoxon signed rank test and McNemar's test for numeric and categorical features, respectively.

Secondary

MeasureTime frameDescription
Blood-based biomarkers - blood immune-inflammatory profileFrom baseline to 6 months post-intervention (up to 6 months)Blood-based biomarkers - blood immune-inflammatory profile will be measured. Will be compared from baseline to 6 months post-intervention using the paired Wilcoxon signed rank test and McNemar's test for numeric and categorical features, respectively.
Blood-based biomarkers - ambient deoxyribonucleic acid damageFrom baseline to 6 months post-intervention (up to 6 months)Blood-based biomarkers - ambient deoxyribonucleic acid damage in circulating peripheral blood mononuclear cells will be measured. Will be compared from baseline to 6 months post-intervention using the paired Wilcoxon signed rank test and McNemar's test for numeric and categorical features, respectively.
Blood-based biomarkers - accumulation of colorectal cancer associated metabolites including deoxycholic bile acidFrom baseline to 6 months post-intervention (up to 6 months)Blood-based biomarkers - accumulation of colorectal cancer associated metabolites including deoxycholic bile acid will be measured. Will be compared from baseline to 6 months post-intervention using the paired Wilcoxon signed rank test and McNemar's test for numeric and categorical features, respectively.

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORGregory Idos

City of Hope Medical Center

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 29, 2026