Effect of Low-Glycemic Index Mediterranean Diet on AGEs (Nutri_AGEs)

January 30, 2015 updated by: Alberto R Osella, Azienda Ospedaliera Specializzata in Gastroenterologia Saverio de Bellis

Effect of a Low Glycemic Index Mediterranean Diet on AGEs. A Randomized Clinical Trial

Advanced glycation end products (AGE) result from a chemical reaction between the carbonyl group of reducing sugar and the nucleophilic NH2 of a free amino acid or a protein; lysine and arginine being the main reactive amino acids on proteins. Following this first step, a molecular rearrangement occurs, rearrangement of Amadori resulting to the formation of Maillard products.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Specialized receptors (RAGE, Galectin 3…) bind AGE. The binding to the receptor causes the formation of free radicals, which have a deleterious effect because they are powerful oxidizing agents, but also play the role of intracellular messenger, altering the cell functions.

This role is especially true at the level of endothelial cells as the attachment of AGE to RAGE receptor causes an increase in vascular permeability. AGE binding to endothelium RAGE and to monocytes-macrophages, led to the production of cytokines, growth factors, to the expression of adhesion molecules, and the production of procoagulant activity. Increased permeability, facilitation of leukocyte migration, the production of reactive oxygen species, cytokines and VEGF suggest that the AGE could be an element of a cascade of reactions responsible for the diabetic angiopathy and vascular damages observed during aging and chronic renal failure. Recently, It's been proposed that balanced diets can limit the deleterious effect of AGE. For these reasons, the interest in preventive approaches complementary or alternative to cholesterol reduction should be one of the main objectives of cardiovascular research in the years to come. Already in the '70s the very low incidence of atherosclerotic diseases in Mediterranean countries (Greece and Southern Italy) and the importance of the "dietary factor" in such protection were noticed. Diets for people in these countries are, among other components, very rich in oleic acid, the main constituent of olive oil, with about 29% of daily caloric intake derived from monounsaturated fatty acids. Aim of this trial is to estimate the effect of a Low Glycemic Index Mediterranean Diet on AGE products.

Study Type

Interventional

Enrollment (Actual)

50

Phase

  • 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

  • Italy
    • BA
      • Castellana Grotte, BA, Italy, 70013
        • Laboratory of Epidemiology and Biostatistics, IRCCS Saverio de Bellis
      • Castellana Grotte, BA, Italy, 70013
        • Laboratory of Epidemiology and Biostatistics

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

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Subject enrolled in the Nutriep cohort assembled in 2005-2007

Exclusion Criteria:

  • Not enrolled in the Nutriep cohort
  • Pregnancy

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: INRAM guidelines' diet
Intervention in this arm consists in some general dietary advice about healthy dietary components, serving size and frequency of servings following the Italian official guidelines.
Other: INRAM Guidelines' diet
Prescription of INRAM guidelines' diet
Active Comparator: Low Glycemic Index Mediterranean Diet
Intervention in this arm consists in a Low Glycemic Index Mediterranean Diet with indication about type of foods than can be consumed frequently (green foods), sometimes (yellow foods) and never (red foods)
Behavioral: Low Glycemic Index Mediterranean Diet
Prescription of a Low Glycemic Index (less than 50) Mediterranean Diet with no more than 10% of total daily calories coming from saturated fats, high in monounsaturated fatty acids (MUFA) from olive oil and omega-3 polyunsaturated fatty acids (ω3PUFA), from both plant and marine sources

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Advanced glycation end products levels
Time Frame: Six months
Blood and skin levels of AGEs
Six months

Collaborators and Investigators

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

Sponsor

Azienda Ospedaliera Specializzata in Gastroenterologia Saverio de Bellis

Investigators

  • Study Director: Giovanni Misciagna, MD, PhD, IRCCS Saverio de Bellis. Laboratorio di Epidemiologia e Biostatistica
  • Study Chair: Rosa Reddavide, Bsc Sc, IRCCS Saverio de Bellis. Laboratorio di Epidemiologia e Biostatistica

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

February 1, 2011

Primary Completion (Actual)

October 1, 2011

Study Completion (Actual)

November 1, 2011

Study Registration Dates

First Submitted

January 28, 2015

First Submitted That Met QC Criteria

January 30, 2015

First Posted (Estimate)

February 2, 2015

Study Record Updates

Last Update Posted (Estimate)

February 2, 2015

Last Update Submitted That Met QC Criteria

January 30, 2015

Last Verified

January 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Nutri_AGEs

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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