Clinical trial NCT00690781: Protein Nutrition During Weight Loss
Official title: Effect of Milk Proteins and Protein Feeding Pattern on Body Composition and Protein Metabolism in Energy Restricted Obese Subjects
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Obesity
Keywords: casein
milk soluble proteins
protein feeding pattern
overweight
obesity
energy restriction
protein metabolism
lean body mass
body composition
nitrogen balance
protein synthesis
proteolysis
spread
pulse
Lead sponsor: Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
Sponsor class: OTHER
Collaborators: name: Centre de Recherche en Nutrition Humaine d'Auvergne
name: ANRS, Emerging Infectious Diseases
name: Université d'Auvergne
First posted: 2008-06-05
Enrollment: 48
Sex: ALL
Minimum age (years): 18
Maximum age (years): 40
Standard ages: ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: SUPPORTIVE_CARE

Brief summary: The purpose of this study is to minimize the loss of lean body mass that occurs during a weight-loss program in obese people by changing the nature of ingested protein and the pattern of protein feeding

Detailed description: In most physiological situations, the adequate amount of protein necessary to promote health is more and more well known. However, for an adequate protein intake, it was shown that the kinetic of amino acid delivery to the organism has an influence on the efficiency of protein utilization. In particular, caseins, slowly digested milk proteins, promote a better protein balance than rapidly digested milk soluble proteins in young subjects (Boirie et al., 1997). In addition, changing protein feeding pattern (80% of daily protein consumed at noon vs 25%) significantly affect protein balance (Arnal et al., 2000). In young healthy individuals, the best protein efficiency is obtained by spreading protein absorption over time (casein, and/or 4 isoproteic meal per day). On the contrary, in older individuals, due to alteration in the sensitivity of protein metabolism to feeding, it is better to use rapidly digested proteins (Dangin et al., 2003), and / or to have a protein-rich meal once a day (Arnal et al., 1999).

Another physiological situation that was not studied in this regard is obesity. Obesity incidence is rapidly increasing around the world. When body mass index (weight / height2) becomes too high (\>30), it is often suggested to restrict energy intake. However, severe energy restriction leads to fat mass loss, but also to lean body mass loss, which should be prevented. Our aim is to test whether for an adequate amount of total protein, it is possible to preserve lean body mass by using either casein, or milk soluble proteins, or by changing protein feeding pattern.

Eligibility criteria: Inclusion Criteria:

* BMI\>30
* sedentary
* normal TSH

Exclusion Criteria:

* any serious health problem

Primary outcomes:
measure: Lean body mass
timeFrame: 6 weeks
Secondary outcomes:
measure: Nitrogen balance
timeFrame: 6 weeks
measure: whole body leucine turnover
timeFrame: 6 weeks
Other outcomes:
Locations:
city: Clermont-Ferrand
country: France
facility: Unité d'Exploration Nutritionnelle (Nutritional Exploration Unit)
Study officials:
affiliation: Université d'Auvergne, CHU de Clermont-Ferrand, Institut National de la Recherche Agronomique
name: Yves Boirie, MD, Ph D, Professor
role: PRINCIPAL_INVESTIGATOR
References:
citation: Arnal MA, Mosoni L, Boirie Y, Houlier ML, Morin L, Verdier E, Ritz P, Antoine JM, Prugnaud J, Beaufrere B, Mirand PP. Protein pulse feeding improves protein retention in elderly women. Am J Clin Nutr. 1999 Jun;69(6):1202-8. doi: 10.1093/ajcn/69.6.1202.
citation: Arnal MA, Mosoni L, Boirie Y, Houlier ML, Morin L, Verdier E, Ritz P, Antoine JM, Prugnaud J, Beaufrere B, Mirand PP. Protein feeding pattern does not affect protein retention in young women. J Nutr. 2000 Jul;130(7):1700-4. doi: 10.1093/jn/130.7.1700.
citation: Boirie Y, Dangin M, Gachon P, Vasson MP, Maubois JL, Beaufrere B. Slow and fast dietary proteins differently modulate postprandial protein accretion. Proc Natl Acad Sci U S A. 1997 Dec 23;94(26):14930-5. doi: 10.1073/pnas.94.26.14930.
citation: Dangin M, Guillet C, Garcia-Rodenas C, Gachon P, Bouteloup-Demange C, Reiffers-Magnani K, Fauquant J, Ballevre O, Beaufrere B. The rate of protein digestion affects protein gain differently during aging in humans. J Physiol. 2003 Jun 1;549(Pt 2):635-44. doi: 10.1113/jphysiol.2002.036897. Epub 2003 Mar 28.
citation: Dardevet D, Sornet C, Bayle G, Prugnaud J, Pouyet C, Grizard J. Postprandial stimulation of muscle protein synthesis in old rats can be restored by a leucine-supplemented meal. J Nutr. 2002 Jan;132(1):95-100. doi: 10.1093/jn/132.1.95.
citation: Lacroix M, Bos C, Leonil J, Airinei G, Luengo C, Dare S, Benamouzig R, Fouillet H, Fauquant J, Tome D, Gaudichon C. Compared with casein or total milk protein, digestion of milk soluble proteins is too rapid to sustain the anabolic postprandial amino acid requirement. Am J Clin Nutr. 2006 Nov;84(5):1070-9. doi: 10.1093/ajcn/84.5.1070.