Relationships Between Quality of Ageing and Age-related Degenerated Disease (Compalimage) (Compalimage)

Chronic Micro-inflammation and Bone and Muscular Status in Elderly

This project aims to assess the impact of chronic micro-inflammation on age-related loss of muscle (sarcopenia) and bone (osteopenia). The hypothesis is that chronic micro-inflammation and oxidative stress, which prevalence increases during ageing, may participate in the pathogenesis of both sarcopenia and osteopenia.

Study Overview

• Status: Unknown
• Conditions: Age-related Degenerated Disease
• Intervention / Treatment: Other: Measurement of muscle protein synthesis using stable isotopes and muscle biopsies.

Detailed Description

In order to explore the effect of a moderate chronic inflammation on skeletal muscle function and protein metabolism and on bone status, two groups of 16 subjects each will be selected according to their inflammatory status ie non-inflamed versus micro-inflamed. The volunteers will be sampled twice at week 0 and week 6 in order to quantify plasma concentration of C reactive protein (CRP) using the ultra sensitive assay. The subjects exhibiting CRP lower than 1 mg/l twice will be included in the non-inflamed group and the subjects exhibiting CRP higher than 3 and lower than 15 mg/l will be included in the micro-inflamed group.

During the two weeks before the metabolic studies dietary intakes, DEXA, muscle function, VO2 max and biomarkers of bone remodelling will be assessed. Volunteers will then be submitted to a diet controlled for its protein content, for 4 days (1 g protein/kg/day and 30 kcal/kg/day) before metabolic investigations. One day before, urine will be collected for metabolomics. On the day of metabolic investigations, after an overnight fast, blood samples will be collected for albumin, fibrinogen, inflammatory cytokine and adipokine determination. Then, the subjects will be perfused with L-[1-13C] leucine for 8 hours (post absorptive sate then post prandial satte) during which expired gas and blood samples will be taken, as well as 2 muscle biopsies. Isotopic enrichments in expired gas, in plasma cetoiscaproate and in free or protein-bound leucine in muscle will be measured to determine proteolysis and proteosynthesis rate of muscle proteins.

• Study Type: Interventional
• Enrollment (Anticipated): 32
• Phase: Not Applicable

Contacts and Locations

Study Locations

• France
  • Clermont-Ferrand, France, 63003
    • Recruiting
    • CHU clermont-ferrand
    • Contact: Patrick Lacarin; Phone Number: 04.73.75.11.95; Email: placarin@chu-clermont-ferrand.fr

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 65 years and older (Older Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

• Male
• Body mass index 21 BMI 30 kg/m2
• Affiliated to National Health Insurance
• Subject giving his written informed consent
• Subject considered as normal after clinical examination and medical questionnaire.

Exclusion Criteria:

• Positive serologies to HIV or HCV, determined on blood samples
• Previous medical and/or surgery judged by the investigator as incompatible with this study
• Chronic pathologies : Diabetes, cardiovascular diseases, cancer, chronic inflammation diseases, renal, pulmonary impairments Reported xylocaïne allergy
• Osteoporosis
• Prostate hypertrophy
• Glaucoma
• Heavy consumer of alcohol
• Practising intensive physical exercise
• Being under someone's supervision
• Refusal to be registered on the National Volunteers Data file
• Dietary habits unreliable to controlled food intake
• Being in exclusion on the National Volunteers Data file

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Isotopic enrichments in expired gas, in plasma cetoisocaproate and in free or protein-bound leucine in muscle will be measured to determine proteolysis and proteosynthesis rate of muscle proteins.	at week 0 and week 6

Secondary Outcome Measures

Outcome Measure	Time Frame
Splanchnic extraction of amino acids, bone metabolism, muscular strength, global metabolism and quality of life.	at week 0 and week 6

Collaborators and Investigators

• Sponsor: University Hospital, Clermont-Ferrand
• Collaborators: Institut National de la Santé Et de la Recherche Médicale, France; Centre de Recherche en Nutrition Humaine d'Auvergne; Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
• Investigators: Principal Investigator: Noël CANO, University Hospital, Clermont-Ferrand; Study Director: Dominique Dardevet, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement

Study record dates

Study Major Dates

• Study Start: January 1, 2009
• Primary Completion (Anticipated): July 1, 2010
• Study Completion (Anticipated): January 1, 2011

Study Registration Dates

• First Submitted: March 12, 2009
• First Submitted That Met QC Criteria: March 16, 2009
• First Posted (Estimate): March 17, 2009

Study Record Updates

• Last Update Posted (Estimate): September 29, 2010
• Last Update Submitted That Met QC Criteria: September 28, 2010
• Last Verified: September 1, 2010

More Information

Terms related to this study

• Keywords: Inflammation; Ageing; Sarcopenia; Osteopenia; Muscle protein synthesis
• Other Study ID Numbers: CHU-0048; IDRCB 2008-A00593-52; AU750