Does Protein Restriction Inhibit Prostrate Cancer Growth

March 24, 2021 updated by: Washington University School of Medicine

The Purpose of the Protein Study is to investigate whether a reduced protein diet can inhibit the growth of prostate cancer in humans.

The Investigators hypothesis is that a reduced protein diet will inhibit expression of genes that are involved in the growth of prostate cancer.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The primary objective of this study is to determine whether or not a low protein diet has an inhibitory effect on prostate cancer cell growth.

The primary outcome measures relative to the investigators primary objectives are:

For Group 1 the expression of genes and proteins of the PI-3K/Akt/mTOR pathway. For Group 2 the PSA values obtained every three months.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
65

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Missouri
      • Saint Louis, Missouri, United States, 63110
        • Washington University School of Medicine

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

Inclusion Criteria:

group 1

  1. Patient must have a diagnosis of prostate cancer confirmed by pathology.
  2. Patient must be scheduled to undergo radical prostatectomy no sooner than 6 weeks from date of enrollment (to allow for a minimum of 4 weeks on the low protein diet).
  3. Patient must have adequate baseline protein intake (screening 4-day food record shows protein > 1.0 g/kg FFM)
  4. Patient must be able to understand the English-language instructions.
  5. Patient must be able to comply with the low protein diet (as evaluated by the dietitian and other study team members).
  6. Patient must be able to understand and willing to sign an IRB-approved written informed consent document.

5.2.2 Inclusion Criteria - Group 2

  1. Patient must have a diagnosis of prostate cancer.
  2. Patient must have previously undergone a radical prostatectomy for treatment of prostate cancer.
  3. Patient must have a detectable PSA (defined as PSA ≥ 0.1) in at least two consecutive measurements, taken at least one month apart, with no therapy between the PSA measurements. If the patient has had additional therapy after the radical prostatectomy, there must be evidence of a rising PSA (i.e., two consecutive measurements at least one month apart) after the patient has completed the intervening therapy (meaning that the patient must have failed treatment).
  4. Patient must have adequate baseline protein intake (screening 4-day food record shows protein > 1.0 g/kg FFM).
  5. Patient must have adequate baseline caloric intake (screening 4-day food record shows caloric intake of > 1500 kcal/day).
  6. Patient must be able to understand the English-language instructions.
  7. Patient must be able to comply with the low protein diet (as evaluated by the dietitian and other study team members).
  8. Patient must be able to understand and willing to sign an IRB-approved written informed consent document.

Exclusion Criteria:

  1. Patient must not currently be receiving any therapy for prostate cancer.
  2. Patient must not have any serious chronic illness such as unstable angina, any uncontrolled metabolic disorder, or any immunologic disorder.
  3. Patient must not have a history of any previous malignancy (with the exception of squamous or basal cell carcinoma of the skin) in the 5 years prior to enrollment (for Group 1) or 12 months prior to enrollment (for Group 2).
  4. Patient must not have a previous history of a stroke.
  5. Patient must not be taking any medications that might confound the study results (anabolic agents (such as androgen, androgen precursor, rhGH) in the 6 months prior to enrollment; corticosteroids (other than nasal) in the 6 months prior to enrollment; or finasteride or dutasteride).
  6. Patient must not have dementia or any other cognitive impairment.

  7. Patient must not have a lifestyle or fixed diet pattern that would interfere with participation in or interpretation of the results of this study

    -

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
No Intervention: Control
No changes in dietary group
Experimental: Protein restrictive diet
reduced protein diet
Other: Protein restrictive diet
To begin a reduced protein diet

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Group1--Expression of genes and proteins of the PI-3K/Akt/mTOR pathway. Group 2--PSA values obtained every three months
Time Frame: group 1- (4-6 weeks), group 2 -(52 weeks)
The investigators will be looking at the increase or decrease of PSA values between control and protein restricted diet participants obtained for the length of study.
group 1- (4-6 weeks), group 2 -(52 weeks)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Washington University School of Medicine

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Valeria Tosti, MD, Washington University School of Medicine
  • Principal Investigator: Luigi Fontana, MD,PhD, Washington University School of Medicine

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2011

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
March 1, 2015

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 1, 2015

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 7, 2012

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 20, 2012

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 25, 2012

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 26, 2021

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 24, 2021

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 201011804

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Plan to publish

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings