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Beneficial Effects of Exercise and Healthy Diets on Muscle and Adipose Tissue

This study has been terminated.

Serious difficulties for patient recruitment

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Fondo Nacional de Desarrollo Científico y Tecnológico, Chile
Information provided by (Responsible Party):
MARIA PIA DE LA MAZA, University of Chile Identifier:
First received: February 11, 2013
Last updated: October 24, 2016
Last verified: October 2016
Both dietary caloric restriction (CR) and physical exercise (PE) exert beneficial effects, which retard or prevent age-related diseases and prolong life span. Subjects with the metabolic syndrome age prematurely, therefore preventive measures should be initiated early. The present study intends to demonstrate that physical exercise and/or Mediterranean diet, in middle aged volunteers with the metabolic syndrome, preserve adequate adipose tissue functionality and retard skeletal muscle aging (assessed by mitochondrial biogenesis and accumulation of ROS), by activating several pathways, homologous to CR. The investigators plan to study this by using two approaches: 1) A cross- sectional model, in which the expression of the mentioned metabolic mediators, indicators of muscle mitochondrial biogenesis and muscle oxidative damage will be compared between men with different body compositions, fat distribution, muscle strength and exercise capacity (VO2max). Also, in these men the investigators will assess the expression of uncoupling protein 1 (UCP1) in subcutaneous white adipose tissue (as a measure of adaptive thermogenesis), and inflammatory markers (Interleukin 1-6, Interleukin 1ß and CCL2 chemokine (C-C motif ligand 2)) in preperitoneal adipose tissue, plus inflammation and adipogenesis potential of their cultured preadipocytes. Moreover, in vitro studies will evaluate the functional effects of exposure of a cell lyne of human adipocyte cells (LS14)to factors secreted by media conditioned by the patients´ adipose tissue explants. 2) A prospective intervention in overweight/moderately obese middle aged volunteers that will be assigned to a weight-maintenance period (as a control group), and then randomly y assigned to a Mediterranean diet, exercise training or diet plus training. Before and after 3 months of intervention the investigators will obtain muscle tissue samples to study the expression of Peroxisome proliferator activated receptor (PPAR) gamma coactivator 1 alpha (PGC1), uncoupling protein 3 (UCP3), AMP activated protein kinase (AMPK), Sirtuin 1 (SIRT-1), mitochondrial DNA and oxidative damage indicators (8-oxo-7,8-dihydro-2-deoxyguanosine (oxodG), carboxymethyllysine (CML and its receptor (RAGE)). In vitro studies will evaluate the effect of circulating factors from the patients (serum) on LS14 inflammatory and adipogenic potential, at baseline and after 3 months of intervention.

Condition Intervention
Metabolic Syndrome
Behavioral: Control period
Behavioral: Diet Group
Behavioral: Exercise group
Behavioral: Diet + Exercise

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: Mitochondrial Biogenesis, Reduction of Muscle Oxidative Damage and Improvement in Adipose Tissue Functional Profile, Account for the Beneficial Effects of Exercise and Healthy Diets

Resource links provided by NLM:

Further study details as provided by MARIA PIA DE LA MAZA, University of Chile:

Primary Outcome Measures:
  • Change in mitochondrial density in muscle tissue [ Time Frame: 3 months ]
    As described in the methodology section

Secondary Outcome Measures:
  • Change in Oxidative damage in muscle tissue [ Time Frame: 3 months ]
    As described in the methodology section

Estimated Enrollment: 115
Study Start Date: July 2013
Study Completion Date: October 2016
Primary Completion Date: October 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Sham Comparator: control period
control period with no intervention. Comparison of parameters at entrance and one month later without any intervention
Behavioral: Control period
Analysis at recruitment and after a month without any intervention
Other Name: Before randomization
Experimental: Diet group
Mediterranean diet prescription during 3 months
Behavioral: Diet Group
selected subjects will adopt a Mediterranean low-AGE diet. We will not include red wine in the Mediterranean diet (7 Kilocalories (KCal)/g), in order to attain more weight loss. Each subject will be instructed to reduce 500 Kcal of their estimated total daily energy requirements, so theoretically they will be able to reduce 5 - 10 % of their body weight in 3 months.
Other Name: Mediterranean diet
Experimental: Exercise group
Subjects will be trained 3 times a week during 3 months
Behavioral: Exercise group
The intervention will consist of 3 weekly 1 hour sessions (5 minutes of preconditioning, followed by 20 minutes cycling, brisk walking or jogging at 65-70 % maximal aerobic capacity, then 25 minutes resistance weight-lifting exercises and finally 10 minutes of stretching). Exercise intensity will be increased weekly according to the Borg Scale intensity. The exercise intervention will be supervised by physical education teachers, registering attendance at every session.
Experimental: Diet + Exercise
Both a dietary prescription plus exercise training during 3 months
Behavioral: Diet + Exercise
these patients will be incorporated to receive both Mediterranean diet plus exercise interventions

  Show Detailed Description


Ages Eligible for Study:   25 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

CROSS SECTIONAL: male sex, age 25 -50 years, with BMI ranging from 20 to 35 kg/mt2. INTERVENTION STUDY: Overweight or obese men and women aged 25 - 50 years interested in losing weight,will

Exclusion Criteria:

CROSS SECTIONAL : diabetes mellitus, chronic neuromuscular or neurological deficits precluding normal physical activity, heavy smoking (> 5 cigarettes per day), alcohol intake > 30 g/day and chronic diseases such as cancer, HIV-AIDS, renal, pulmonary, cardiac or hepatic conditions.

INTERVENTION STUDY: weight fluctuations (> 3 k in the last 3 months), diabetes mellitus, chronic neuromuscular or neurologic diseases, heavy smoking (> 5 cigarettes per day) and alcohol intake > 30 g/day, and chronic diseases such as cancer, HIV, renal, pulmonary, cardiac or hepatic conditions.

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Please refer to this study by its identifier: NCT01793896

Institute of Nutrition & Food Technology (INTA)
Santiago, Metropolitan Region, Chile, 7830490
Sponsors and Collaborators
University of Chile
Fondo Nacional de Desarrollo Científico y Tecnológico, Chile
Principal Investigator: Maria Pia de la Maza, Professor University of Chile
  More Information

Responsible Party: MARIA PIA DE LA MAZA, Professor, University of Chile Identifier: NCT01793896     History of Changes
Other Study ID Numbers: Fondecyt 1130284
INSTITUTE OF NUTRITION 2013 ( Other Identifier: INTA )
Study First Received: February 11, 2013
Last Updated: October 24, 2016

Keywords provided by MARIA PIA DE LA MAZA, University of Chile:
Metabolic syndrome
Mitochondrial density
Oxidative damage
Inflammatory mediators

Additional relevant MeSH terms:
Metabolic Syndrome X
Insulin Resistance
Glucose Metabolism Disorders
Metabolic Diseases processed this record on May 25, 2017