7-Days Water-Only Fasting Trial in Prostate Cancer

NCT ID: NCT06826924

Last Updated: 2025-07-08

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 10 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-06-03
• Study Completion Date: 2026-06-03

Brief Summary

Activating the immune system to kill cancer cells is a promising therapeutic strategy for some patients with cancer. Unfortunately, current immune-targeting treatments do not work for patients with prostate cancer. In animal models of cancer, fasting can reprogram the body's metabolism and immune cell function to help immune cells kill cancer cells. The purpose of this study is to determine whether 7 days of water-only fasting or a very low-calorie diet is safe and feasible for patients with metastatic prostate cancer. This will help the investigators develop future studies to test whether incorporating periods of fasting or very low calorie diets into treatment plans for prostate cancer can improve outcomes from this disease.

Detailed Description

Seven days of water-only fasting is safe and feasible in healthy adults. Fasting enhances anti-tumor immunity in animal models of cancer. The primary objective of this study is to determine if 7 days of water-only fasting or a ketogenic very low-calorie diet is safe and feasible in patients with metastatic prostate cancer. Patients with metastatic prostate cancer will be instructed to perform a 7-day water-only fast followed by a 3-day refeeding protocol to evaluate safety and feasibility. Eligible patients are those with metastatic prostate adenocarcinoma. Patients will perform a 7-day water-only fast followed by a 3-day refeeding protocol. Patients will be monitored by regular labs and a clinic visit on Day 3. Patients may deviate to a ketogenic very low-calorie diet at any time between Day 1 and Day 7.

Conditions

Metastatic Prostate Cancer

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Fasting

7-day water-only fast followed by a 3-day refeeding

Group Type: EXPERIMENTAL

Fasting

Intervention Type: BEHAVIORAL

7 days of water-only fasting

Interventions

Fasting

7 days of water-only fasting

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

1. Eastern Cooperative Oncology Group (ECOG) Performance Status 0 or 1

2. Age ≥18 years

3. Diagnosis of metastatic adenocarcinoma of the prostate

4. Must have a soft tissue metastasis amenable to biopsy

5. Prostate-specific antigen (PSA) is not currently declining, as determined by most recent 2 measurements taken at least 1 week apart in previous 2 months.

6. BMI between 20 and 35 kg/m2

7. Prior treatment with any prostate cancer therapy is permitted if >2 weeks from last dose. Patients are not required to have received prior treatment for prostate cancer.

8. Prior treatment with steroids is permitted if >2 weeks from last dose. Patients who cannot be weaned off steroids are not eligible.

9. Acceptable liver function:

1. Bilirubin < 2.5 times institutional upper limit of normal (ULN)

2. Aspartate transaminase (AST) (SGOT) and Alanine transaminase (ALT) (SGPT) < 2.5 times ULN

10. Acceptable renal function: glomerular filtration rate (GFR) of 50 mL/min/1.73 m2 or higher. GFR will be estimated by the 2021 chronic kidney disease epidemiology (CKD-EPI) creatinine equation1 using the online calculator found on UpToDate.com

11. Acceptable hematologic status:

1. Absolute neutrophil count (ANC) ≥ 1500 cells/mm3 (1.5 ×109/L)

2. Platelet count ≥ 100,000 platelet/mm3 (100 ×109/L)

3. Hemoglobin ≥ 8 g/dL.

12. Acceptable electrolyte and acid/base status:

1. Sodium 135-148 millimoles (mM) per litre

2. Potassium 3.5-5.1mM

3. Carbon Dioxide 21-31mM

4. Phosphorus 2.7-4.5mM

5. Magnesium ≥1.6mM

6. Lactate ≤2mM

13. Ability to understand and willingness to sign a written informed consent document

Exclusion Criteria

1. ECOG Performance status ≥2

2. Unintentional weight loss greater than or equal to 5% in previous 3 months

3. Diabetes mellitus, defined as HbA1c ≥6.5% or use of medications for diabetes

4. Active uncontrolled infection. Patients with a history of HIV/AIDS may be eligible if cluster of differentiation 4 (CD4)+ T cell counts are ≥ 350 cell/ul, the patient have had no opportunistic infection within the past 12 months, the patient have been on established antiretroviral therapy (ART) for at least four weeks, and the HIV viral load is less than 400 copies/ml prior to enrollment. Patients with a history of hepatitis C virus (HCV) infection are eligible if the patient have completed curative antiviral treatment and the HCV viral load is below the limit of quantification.

5. Use of immunosuppressive medications including steroids

6. Use of diuretics or beta blockers

7. History of cardiac arrythmia, myocardial infarction, valvular heart disease, or pulmonary hypertension

8. Abnormal screening EKG

9. Daily alcohol consumption

10. Any condition or mental impairment that may compromise the ability to give informed consent, patient's safety or compliance with study requirements as determined by the investigator

• Minimum Eligible Age: 18 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: No

Sponsors

Abott Lingo Wearables

UNKNOWN

Sponsor Role: collaborator

Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Laura Sena, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

SKCCC Johns Hopkins Medical Institution

Locations

Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins

Baltimore, Maryland, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

Laura Sena, MD, PhD

Role: CONTACT

laura.sena@jhmi.edu

410-502-3825

Facility Contacts

Laura Sena

Role: primary

Laura.Sena@jhmi.edu

Other Identifiers

IRB00456089

Identifier Type: OTHER

Identifier Source: secondary_id

J2487

Identifier Type: -

Identifier Source: org_study_id