Effects of Low Protein Formula on Renal Function, Oxidative Stress and Antioxidant Capacities in CKD Patients

November 25, 2013 updated by: Taichung Veterans General Hospital

The Effects of Low Protein Formula on Renal Function, Oxidative Stress and Antioxidant Capacities in Patients With Chronic Kidney Disease

Chronic renal disease is now the tenth leading cause of mortality Taiwan. It is worth to study the effect of low protein formula on the retardation of failing renal function, decrease plasma homocysteine and oxidative stress and further increase antioxidant capacities in patients with chronic kidney disease. The purpose of this study is going to investigate the effects of protein formula on renal function, homocysteine , oxidative stress and antioxidant capacities in patients with chronic kidney disease. One hundred and twenty patients with end stage renal disease (stage 2~4) who meet the inclusion criteria will be recruited from Taichung General Veterans Hospital, Taichung. Participant patients will be blinded and randomly assigned to either the placebo (n = 60) or low protein formula (n = 60) for 12 weeks. Data on demography, anthropometry and medical history will be collected, and fasting blood samples and 24 h urine samples will be obtained at week 0, 12 and 24 during intervention period. The levels of hematological, plasma and erythrocyte PLP, plasma pyridoxal and 4-pyridoxic acid, serum and erythrocyte folate, serum vitamin B-12, homocysteine, lipid peroxidation indicators, glutathione, total antioxidant capacity and antioxidant enzymatic will be measured. Twenty-four hour urine volume will be recorded and urine creatinine and urea nitrogen will be analyzed. Creatinine clearance rate will be measured. Hopefully, the results of this study could provide more pictures on beneficial effects of low protein formula on renal function, plasma homocysteine, oxidative stress and antioxidant capacities in patients with chronic kidney disease.

Study Overview

Status

Status

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

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

Chronic renal disease is now the tenth leading cause of mortality Taiwan. It is worth to study the effect of low protein formula on the retardation of failing renal function, decrease plasma homocysteine and oxidative stress and further increase antioxidant capacities in patients with chronic kidney disease. The purpose of this study is going to investigate the effects of protein formula on renal function, homocysteine , oxidative stress and antioxidant capacities in patients with chronic kidney disease. This protocol is designed as a hospital-based blinded randomized placebo-controlled intervention trial. One hundred and twenty patients with end stage renal disease who meet the inclusion criteria will be recruited from Taichung General Veterans Hospital, Taichung. Participant patients will be blinded and randomly assigned to either the placebo (n = 60) or low protein formula (n = 60) for 12 weeks. Data on demography, anthropometry and medical history will be collected, and fasting blood samples and 24 h urine samples will be obtained at week 0, 12 and 24 during intervention period. The levels of hematological (red blood cell, hemoglobin, albumin, creatinine, urea nitrogen, total cholesterol, triglyceride, high and low density lipoprotein), plasma and erythrocyte PLP, plasma pyridoxal and 4-pyridoxic acid, serum and erythrocyte folate, serum vitamin B-12, homocysteine, lipid peroxidation indicators (serum malondialdehyde and oxidized low density lipoprotein), glutathione, total antioxidant capacity and antioxidant enzymatic activities (superoxide dismutase, glutathione peroxidase, glutathione S-transferase, glutathione reductase) will be measured. Twenty-four hour urine volume will be recorded and urine creatinine and urea nitrogen will be analyzed. Creatinine clearance rate will be measured. Hopefully, the results of this study could provide more pictures on beneficial effects of low protein formula on renal function, plasma homocysteine, oxidative stress and antioxidant capacities in patients with chronic kidney disease.

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 (Anticipated)

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.
120

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 Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Yi-Chia Huang, PhD
  • Phone Number: 12198 +886424730022
  • Email: ych@csmu.edu.tw

Study Locations

  • Taiwan
      • Taichung, Taiwan, 40705
        • Taichung Veterans General Hospital

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

16 years to 81 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

1) Diagnosed as stage 2 ~ 3 chronic kidney disease

Exclusion Criteria:

  1. clinical unstable (i.e., systolic blood pressure < 90 mmHg, mean arterial blood pressure < 65 mmHg, fatal arrhythmia or the requirement of vasopressor to maintain blood pressure) or unconscious at any point during the study.
  2. chronic diseases (i.e. liver disease, gastrointestinal diseases, alcoholism, cancer); or 3) being in pregnant or lactation.

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: Supportive Care
  • 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: Observational group
No intervention
Experimental: Dietary supplement
Low protein formula formula (28.5 g) twice a day
Dietary supplement: Low protein formula group
Low protein formula formula (28.5 g) twice a day

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
Time Frame
Creatinine clearance rate
Time Frame: 6 months
6 months

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.
Taichung Veterans General Hospital

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

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.
December 1, 2013

Primary Completion (Anticipated)

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.
December 1, 2014

Study Completion (Anticipated)

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.
December 1, 2014

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).
November 20, 2013

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.
November 25, 2013

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.
December 3, 2013

Study Record Updates

Last Update Posted (Estimate)

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.
December 3, 2013

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.
November 25, 2013

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.
November 1, 2013

More Information

Terms related to this study

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.
  • SF13223

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.

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