Effect of Low-Glycemic Index Mediterranean Diet on AGEs

Obesity Clinical Trial

— Nutri_AGEs  

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02353416
• Other study ID #: Nutri_AGEs
• Status: Completed
• Phase: N/A
• First received: January 28, 2015
• Last updated: January 30, 2015
• Start date: February 2011
• Est. completion date: November 2011

Study information

• Verified date: January 2015
• Source: Azienda Ospedaliera Specializzata in Gastroenterologia Saverio de Bellis
• Contact: n/a
• Is FDA regulated: No
• Health authority: Italy: Ministry of Health
• Study type: Interventional

Clinical Trial Summary

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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 50
• Est. completion date: November 2011
• Est. primary completion date: October 2011
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

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

Exclusion Criteria:

• Not enrolled in the Nutriep cohort

• Pregnancy

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Outcomes Assessor), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Cardiovascular Disease
• Cardiovascular Diseases
• Insulin Resistance
• Obesity
• Type 2 Diabetes

Intervention

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 (?3PUFA), from both plant and marine sources

Other:
• INRAM Guidelines' diet
Prescription of INRAM guidelines' diet

Locations

Country	Name	City	State
Italy	Laboratory of Epidemiology and Biostatistics	Castellana Grotte	BA
Italy	Laboratory of Epidemiology and Biostatistics, IRCCS Saverio de Bellis	Castellana Grotte	BA

Sponsors (1)

Lead Sponsor	Collaborator
Azienda Ospedaliera Specializzata in Gastroenterologia Saverio de Bellis

Country where clinical trial is conducted

Italy, 

References & Publications (1)

Cozzolongo R, Osella AR, Elba S, Petruzzi J, Buongiorno G, Giannuzzi V, Leone G, Bonfiglio C, Lanzilotta E, Manghisi OG, Leandro G; NUTRIHEP Collaborating Group, Donnaloia R, Fanelli V, Mirizzi F, Parziale L, Crupi G, Detomaso P, Labbate A, Zizzari S, Depalma M, Polignano A, Lopinto D, Daprile G. Epidemiology of HCV infection in the general population: a survey in a southern Italian town. Am J Gastroenterol. 2009 Nov;104(11):2740-6. doi: 10.1038/ajg.2009.428. Epub 2009 Jul 28. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Advanced glycation end products levels	Blood and skin levels of AGEs	Six months	No