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Effect of a High Protein Diet on the 24-hour Profile of Ghrelin, GH (Growth Hormone) and IGF-1 (Insulin-like Growth Factor-1)

This study has been completed.
Information provided by (Responsible Party):
Department of Veterans Affairs Identifier:
First received: April 14, 2005
Last updated: June 30, 2014
Last verified: June 2014

In this study we tested the hypothesis that an increase in protein content of the diet will result in an increase in the 24-hour integrated circulating growth hormone (GH) and insulin-like growth factor-1 (IGF-1) concentrations and an increase in lean body mass in people with untreated type 2 diabetes.

Condition Intervention
Diabetes Mellitus, Type 2
Other: LoBag Diet - test phase
Other: LoBAG Diet - control phase

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Crossover Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: 2895 Effect of a High Protein Diet on the 24-hr Profile of Ghrelin, GH and IGF-1

Resource links provided by NLM:

Further study details as provided by Department of Veterans Affairs:

Primary Outcome Measures:
  • IGF-1, GH, Body Composition [ Time Frame: 5 weeks ] [ Designated as safety issue: No ]

Enrollment: 8
Study Start Date: July 2004
Study Completion Date: May 2009
Primary Completion Date: December 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Arm 1
30% carbohydrate, 30% protein, 40% fat
Other: LoBag Diet - test phase
A Low Biologically Available Glucose (LOBAG30), weight maintaining diet consisting of 30% carbohydrate, 30% protein, 40% fat will be provided to subjects for 5 weeks.
Placebo Comparator: Arm 2
55% carbohydrate, 15% protein, 30% fat
Other: LoBAG Diet - control phase
A control, weight maintaining diet consisting of 55% carbohydrate, 15% protein, 30% fat will be provided to subjects for 5 weeks

Detailed Description:

Subjects with untreated type 2 diabetes were studied using a randomized crossover design. The study began with an initial two-week observation period. Subjects then were randomly assigned to one arm of the study for 5 weeks. The carbohydrate:protein:fat ratio for the control diet is 55:15:30 whereas for the test diet it is 40:30:30. Following a five-week washout period, subjects were assigned to the other arm of the study. All meals were provided by the SDTU. A six-day rotating meal plan has been devised. At the beginning and end of the 5-week diet period, the subject was admitted to the SDTU (Special Diagnostic and Treatment Unit), was provided with the meals appropriate for the test or control arm of the study, and had blood drawn at various times during a 24-hour period. In addition to measurement of GH and IGF-1, IGF-binding proteins 1 and 3, ghrelin, and body composition were determined.


Ages Eligible for Study:   55 Years to 75 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • People ages 55 - 75 years old with type 2 diabetes, not receiving oral hypoglycemic agents or insulin.
  • Fasting plasma glucose < 250 mg/dl (<14 mM) (tGHb < 14%).

Exclusion Criteria:

  • Subjects will be screened for hematological abnormalities, liver disease, kidney disease, macroalbuminuria (>300 mg/24 hours), untreated thyroid disease, congestive heart failure, angina, life-threatening malignancies, proliferative retinopathy, diabetic neuropathy, peripheral vascular disease, serious psychological disorders, a body mass index > 35, and a fasting triglyceride of > 400 mg/dl.
  • Presence of any of the above will be considered exclusion criteria.
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Please refer to this study by its identifier: NCT00108225

United States, Minnesota
VA Medical Center, Minneapolis
Minneapolis, Minnesota, United States, 55417
Sponsors and Collaborators
Principal Investigator: Mary Gannon, PhD Minneapolis Veterans Affairs Medical Center
  More Information

Responsible Party: Department of Veterans Affairs Identifier: NCT00108225     History of Changes
Other Study ID Numbers: 03448-A
Study First Received: April 14, 2005
Last Updated: June 30, 2014
Health Authority: United States: Federal Government

Keywords provided by Department of Veterans Affairs:
Creatinine Clearance
High Protein Diet

Additional relevant MeSH terms:
Diabetes Mellitus, Type 2
Diabetes Mellitus
Endocrine System Diseases
Glucose Metabolism Disorders
Metabolic Diseases processed this record on March 03, 2015