1
|
DiVito D, Wellik A, Burfield J, Peterson J, Flickinger J, Tindall A, Albanowski K, Vishnubhatt S, MacMullen L, Martin I, Muraresku C, McCormick E, George-Sankoh I, McCormack S, Goldstein A, Ganetzky R, Yudkoff M, Xiao R, Falk MJ, R Mascarenhas M, Zolkipli-Cunningham Z. Optimized Nutrition in Mitochondrial Disease Correlates to Improved Muscle Fatigue, Strength, and Quality of Life. Neurotherapeutics 2023; 20:1723-1745. [PMID: 37723406 PMCID: PMC10684455 DOI: 10.1007/s13311-023-01418-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/26/2023] [Indexed: 09/20/2023] Open
Abstract
We sought to prospectively characterize the nutritional status of adults ≥ 19 years (n = 22, 27% males) and children (n = 38, 61% male) with genetically-confirmed primary mitochondrial disease (PMD) to guide development of precision nutritional support strategies to be tested in future clinical trials. We excluded subjects who were exclusively tube-fed. Daily caloric requirements were estimated using World Health Organization (WHO) equations to predict resting energy expenditure (REE) multiplied by an activity factor (AF) based on individual activity levels. We developed a Mitochondrial Disease Activity Factors (MOTIVATOR) score to encompass the impact of muscle fatigue typical of PMD on physical activity levels. PMD cohort daily diet intake was estimated to be 1,143 ± 104.1 kcal in adults (mean ± SEM, 76.2% of WHO-MOTIVATOR predicted requirement), and 1,114 ± 62.3 kcal in children (86.4% predicted). A total of 11/22 (50%) adults and 18/38 (47.4%) children with PMD consumed ≤ 75% predicted daily Kcal needs. Malnutrition was identified in 16/60 (26.7%) PMD subjects. Increased protein and fat intake correlated with improved muscle strength in those with insufficient daily Kcal intake (≤ 75% predicted); higher protein and fat intake correlated with decreased muscle fatigue; and higher protein, fat, and carbohydrate intake correlated with improved quality of life (QoL). These data demonstrate the frequent occurrence of malnutrition in PMD and emphasize the critical need to devise nutritional interventions to optimize clinical outcomes.
Collapse
Affiliation(s)
- Donna DiVito
- Clinical Nutrition Department, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Amanda Wellik
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Jessica Burfield
- Clinical Nutrition Department, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - James Peterson
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Jean Flickinger
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Alyssa Tindall
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Division of Gastroenterology and Nutrition, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Kimberly Albanowski
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Shailee Vishnubhatt
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Laura MacMullen
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Isaac Martin
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Colleen Muraresku
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Elizabeth McCormick
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Ibrahim George-Sankoh
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Shana McCormack
- Division of Endocrinology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Amy Goldstein
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Rebecca Ganetzky
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Marc Yudkoff
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Rui Xiao
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Marni J Falk
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Maria R Mascarenhas
- Division of Gastroenterology and Nutrition, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Zarazuela Zolkipli-Cunningham
- Department of Pediatrics, Division of Human Genetics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
| |
Collapse
|
2
|
Barbé C, Salles J, Chambon C, Giraudet C, Sanchez P, Patrac V, Denis P, Boirie Y, Walrand S, Gueugneau M. Characterization of the Skeletal Muscle Proteome in Undernourished Old Rats. Int J Mol Sci 2022; 23:ijms23094762. [PMID: 35563153 PMCID: PMC9101871 DOI: 10.3390/ijms23094762] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/10/2022] [Accepted: 04/15/2022] [Indexed: 12/04/2022] Open
Abstract
Aging is associated with a progressive loss of skeletal muscle mass and function termed sarcopenia. Various metabolic alterations that occur with aging also increase the risk of undernutrition, which can worsen age-related sarcopenia. However, the impact of undernutrition on aged skeletal muscle remains largely under-researched. To build a deeper understanding of the cellular and molecular mechanisms underlying age-related sarcopenia, we characterized the undernutrition-induced changes in the skeletal muscle proteome in old rats. For this study, 20-month-old male rats were fed 50% or 100% of their spontaneous intake for 12 weeks, and proteomic analysis was performed on both slow- and fast-twitch muscles. Proteomic profiling of undernourished aged skeletal muscle revealed that undernutrition has profound effects on muscle proteome independently of its effect on muscle mass. Undernutrition-induced changes in muscle proteome appear to be muscle-type-specific: slow-twitch muscle showed a broad pattern of differential expression in proteins important for energy metabolism, whereas fast-twitch muscle mainly showed changes in protein turnover between undernourished and control rats. This first proteomic analysis of undernourished aged skeletal muscle provides new molecular-level insight to explain phenotypic changes in undernourished aged muscle. We anticipate this work as a starting point to define new biomarkers associated with undernutrition-induced muscle loss in the elderly.
Collapse
Affiliation(s)
- Caroline Barbé
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
| | - Jérôme Salles
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
| | - Christophe Chambon
- Animal Products Quality Unit (QuaPA), INRAE, 63122 Clermont-Ferrand, France;
- Metabolomic and Proteomic Exploration Facility, Clermont Auvergne University, INRAE, 63122 Clermont-Ferrand, France
| | - Christophe Giraudet
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
| | - Phelipe Sanchez
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
| | - Véronique Patrac
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
| | - Philippe Denis
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
| | - Yves Boirie
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
- Department of Clinical Nutrition, Clermont-Ferrand University Hospital Center, 63000 Clermont-Ferrand, France
| | - Stéphane Walrand
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
- Department of Clinical Nutrition, Clermont-Ferrand University Hospital Center, 63000 Clermont-Ferrand, France
| | - Marine Gueugneau
- Human Nutrition Unit, INRAE, Auvergne Human Nutrition Research Center, Clermont Auvergne University, 63000 Clermont-Ferrand, France; (C.B.); (J.S.); (C.G.); (P.S.); (V.P.); (P.D.); (Y.B.); (S.W.)
- Correspondence: ; Tel.: +33-4-73-60-82-65
| |
Collapse
|
3
|
Hirabayashi T, Nakanishi R, Tanaka M, Nisa BU, Maeshige N, Kondo H, Fujino H. Reduced metabolic capacity in fast and slow skeletal muscle via oxidative stress and the energy-sensing of AMPK/SIRT1 in malnutrition. Physiol Rep 2021; 9:e14763. [PMID: 33650806 PMCID: PMC7923585 DOI: 10.14814/phy2.14763] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 01/05/2021] [Accepted: 01/06/2021] [Indexed: 11/24/2022] Open
Abstract
The effects of malnutrition on skeletal muscle result in not only the loss of muscle mass but also fatigue intolerance. It remains unknown whether the metabolic capacity is related to the fiber type composition of skeletal muscle under malnourished condition although malnutrition resulted in preferential atrophy in fast muscle. The purpose of the present study was to investigate the effects of metabolic capacity in fast and slow muscles via the energy-sensing of AMPK and SIRT1 in malnutrition. Wistar rats were randomly divided into control and malnutrition groups. The rats in the malnutrition group were provided with a low-protein diet, and daily food intake was limited to 50% for 12 weeks. Malnutrition with hypoalbuminemia decreased the body weight and induced the loss of plantaris muscle mass, but there was little change in the soleus muscle. An increase in the superoxide level in the plasma and a decrease in SOD-2 protein expression in both muscles were observed in the malnutrition group. In addition, the expression level of AMPK in the malnutrition group increased in both muscles. Conversely, the expression level of SIRT1 decreased in both muscles of the malnutrition group. In addition, malnutrition resulted in a decrease in the expression levels of PGC-1α and PINK protein, and induced a decrease in the levels of two key mitochondrial enzymes (succinate dehydrogenase and citrate synthase) and COX IV protein expression in both muscles. These results indicate that malnutrition impaired the metabolic capacity in both fast and slow muscles via AMPK-independent SIRT1 inhibition induced by increased oxidative stress.
Collapse
Affiliation(s)
- Takumi Hirabayashi
- Department of Rehabilitation ScienceKobe University Graduate School of Health SciencesKobeJapan
- Department of RehabilitationNose HospitalKobeJapan
| | - Ryosuke Nakanishi
- Department of Rehabilitation ScienceKobe University Graduate School of Health SciencesKobeJapan
- Faculty of RehabilitationKobe International UniversityKobeJapan
| | - Minoru Tanaka
- Department of Rehabilitation ScienceKobe University Graduate School of Health SciencesKobeJapan
- Department of Rehabilitation ScienceOsaka Health Science UniversityOsakaJapan
| | - Badur un Nisa
- Department of Rehabilitation ScienceKobe University Graduate School of Health SciencesKobeJapan
| | - Noriaki Maeshige
- Department of Rehabilitation ScienceKobe University Graduate School of Health SciencesKobeJapan
| | - Hiroyo Kondo
- Department of Rehabilitation ScienceKobe University Graduate School of Health SciencesKobeJapan
- Department of Food Science and NutritionNagoya Women’s UniversityNagoyaJapan
| | - Hidemi Fujino
- Department of Rehabilitation ScienceKobe University Graduate School of Health SciencesKobeJapan
| |
Collapse
|
4
|
Salles J, Chanet A, Berry A, Giraudet C, Patrac V, Domingues-Faria C, Rocher C, Guillet C, Denis P, Pouyet C, Bonhomme C, Le Ruyet P, Rolland Y, Boirie Y, Walrand S. Fast digestive, leucine-rich, soluble milk proteins improve muscle protein anabolism, and mitochondrial function in undernourished old rats. Mol Nutr Food Res 2017; 61. [PMID: 28758352 DOI: 10.1002/mnfr.201700287] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 07/03/2017] [Accepted: 07/20/2017] [Indexed: 12/16/2022]
Abstract
SCOPE One strategy to manage malnutrition in older patients is to increase protein and energy intake. Here, we evaluate the influence of protein quality during refeeding on improvement in muscle protein and energy metabolism. METHODS AND RESULTS Twenty-month-old male rats (n = 40) were fed 50% of their spontaneous intake for 12 weeks to induce malnutrition, then refed ad libitum with a standard diet enriched with casein or soluble milk proteins (22%) for 4 weeks. A 13C-valine was infused to measure muscle protein synthesis and expression of MuRF1, and MAFbx was measured to evaluate muscle proteolysis. mTOR pathway activation and mitochondrial function were assessed in muscle. Malnutrition was associated with a decrease in body weight, fat mass, and lean mass, particularly muscle mass. Malnutrition decreased muscle mTOR pathway activation and protein FSR associated with increased MuRF1 mRNA levels, and decreased mitochondrial function. The refeeding period partially restored fat mass and lean mass. Unlike the casein diet, the soluble milk protein diet improved muscle protein metabolism and mitochondrial function in old malnourished rats. CONCLUSIONS These results suggest that providing better-quality proteins during refeeding may improve efficacy of renutrition in malnourished older patients.
Collapse
Affiliation(s)
- Jérôme Salles
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | - Audrey Chanet
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | - Alexandre Berry
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | - Christophe Giraudet
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | - Véronique Patrac
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | - Carla Domingues-Faria
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | | | - Christelle Guillet
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | - Philippe Denis
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | - Corinne Pouyet
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| | - Cécile Bonhomme
- Lactalis Nutrition Santé, Torcé, France
- Lactalis Research and Development, Retiers, France
| | - Pascale Le Ruyet
- Lactalis Nutrition Santé, Torcé, France
- Lactalis Research and Development, Retiers, France
| | - Yves Rolland
- Gérontopôle de Toulouse, Institut du Vieillissement, Centre Hospitalo-Universitaire de Toulouse (CHU Toulouse), Toulouse, France
- UMR INSERM 1027, University of Toulouse III, Toulouse, France
| | - Yves Boirie
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
- CHU Clermont-Ferrand, Clinical Nutrition Department, Clermont-Ferrand, France
| | - Stéphane Walrand
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, Clermont-Ferrand, France
| |
Collapse
|
5
|
Bharadwaj S, Ginoya S, Tandon P, Gohel TD, Guirguis J, Vallabh H, Jevenn A, Hanouneh I. Malnutrition: laboratory markers vs nutritional assessment. Gastroenterol Rep (Oxf) 2016; 4:272-280. [PMID: 27174435 PMCID: PMC5193064 DOI: 10.1093/gastro/gow013] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 02/26/2016] [Accepted: 03/16/2016] [Indexed: 12/24/2022] Open
Abstract
Malnutrition is an independent risk factor for patient morbidity and mortality and is associated with increased healthcare-related costs. However, a major dilemma exists due to lack of a unified definition for the term. Furthermore, there are no standard methods for screening and diagnosing patients with malnutrition, leading to confusion and varying practices among physicians across the world. The role of inflammation as a risk factor for malnutrition has also been recently recognized. Historically, serum proteins such as albumin and prealbumin (PAB) have been widely used by physicians to determine patient nutritional status. However, recent focus has been on an appropriate nutrition-focused physical examination (NFPE) for diagnosing malnutrition. The current consensus is that laboratory markers are not reliable by themselves but could be used as a complement to a thorough physical examination. Future studies are needed to identify serum biomarkers in order to diagnose malnutrition unaffected by inflammatory states and have the advantage of being noninvasive and relatively cost-effective. However, a thorough NFPE has an unprecedented role in diagnosing malnutrition.
Collapse
Affiliation(s)
- Shishira Bharadwaj
- Department of Gastroenterology/Hepatology, McMaster University, Hamilton, Ontario, Canada
| | - Shaiva Ginoya
- Department of Gastroenterology/Hepatology, McMaster University, Hamilton, Ontario, Canada
| | - Parul Tandon
- Department of Gastroenterology/Hepatology, McMaster University, Hamilton, Ontario, Canada
| | - Tushar D Gohel
- Department of Gastroenterology/Hepatology, McMaster University, Hamilton, Ontario, Canada
| | - John Guirguis
- Department of Gastroenterology/Hepatology, McMaster University, Hamilton, Ontario, Canada
| | - Hiren Vallabh
- Department of Gastroenterology/Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Andrea Jevenn
- Department of Gastroenterology/Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Ibrahim Hanouneh
- Department of Gastroenterology/Hepatology, Cleveland Clinic, Cleveland, OH, USA
| |
Collapse
|
6
|
Thibault R, Chanséaume S, Azarnoush K, Guillet C, Giraudet C, Patrac V, Lusson JR, Cano N, Boirie Y, Walrand S. Mitochondrial protein synthesis is increased in oxidative skeletal muscles of rats with cardiac cachexia. Nutr Res 2014; 34:250-7. [PMID: 24655492 DOI: 10.1016/j.nutres.2013.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 12/19/2013] [Accepted: 12/31/2013] [Indexed: 11/30/2022]
Abstract
Since cardiac cachexia could be associated with alterations in muscular mitochondrial metabolism, we hypothesized that the expected alterations in the activities of mitochondrial oxidative enzymes could be associated with changes in mitochondrial protein synthesis in oxidative skeletal muscles. Cardiac cachexia was provoked in male rats by the ligation of the left coronary artery. Six cachectic and 6 control rats were age-paired, and their food intake was observed. The synthesis of mitochondrial proteins was measured by [1-13C]-valine infusion in soleus, tibilais, myocardium, and liver. Muscles (soleus, gastrocnemius, and tibialis anterior), heart, kidneys, liver, and visceral adipose tissue were weighed. Mitochondrial cytochrome c oxydase IV as well as citrate synthase and myosin ATPase activities were measured. As expected, decreased food intake was observed in the cachectic group. Heart, kidney, and liver weights were higher in the cachectic group, while the visceral adipose tissue weight was lower (P < .01). No changes in muscle weights were observed. Soleus mitochondrial proteins fractional synthesis rate was higher in the cachectic group (P = .054). Cytochrome c oxydase IV activity was reduced (P = .009) and increased (P = .038) in the soleus and liver of the cachectic rats, respectively. No change in citrate synthase activity was observed. Myosin ATPase activity was reduced in the gastrocnemius of the cachectic group (P < .01). Mitochondrial protein synthesis is increased in the soleus of rats with cardiac cachexia, suggesting a compensatory mechanism of the impaired oxidative mitochondrial function. Further work should assess whether the mitochondrial protein synthesis is altered in chronic heart failure patients with cardiac cachexia, and whether this is the cause or the consequence of cachexia.
Collapse
Affiliation(s)
- Ronan Thibault
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 CLERMONT-FERRAND, Cedex, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 CLERMONT-FERRAND, Cedex, France; CHU Clermont-Ferrand, Service de Nutrition Clinique, F-63003 CLERMONT-FERRAND, Cedex, France; Nutrition Unit, Geneva University Hospital, Geneva, Switzerland
| | - Sylvain Chanséaume
- CHU Clermont-Ferrand, Service de Cardiologie, F-63003 CLERMONT-FERRAND, Cedex, France
| | - Kasra Azarnoush
- CHU Clermont-Ferrand, Service de Chirurgie Vasculaire, F-63003 CLERMONT-FERRAND, Cedex, France
| | - Christelle Guillet
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 CLERMONT-FERRAND, Cedex, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 CLERMONT-FERRAND, Cedex, France
| | - Christophe Giraudet
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 CLERMONT-FERRAND, Cedex, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 CLERMONT-FERRAND, Cedex, France
| | - Véronique Patrac
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 CLERMONT-FERRAND, Cedex, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 CLERMONT-FERRAND, Cedex, France
| | | | - Noël Cano
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 CLERMONT-FERRAND, Cedex, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 CLERMONT-FERRAND, Cedex, France; CHU Clermont-Ferrand, Service de Nutrition Clinique, F-63003 CLERMONT-FERRAND, Cedex, France
| | - Yves Boirie
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 CLERMONT-FERRAND, Cedex, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 CLERMONT-FERRAND, Cedex, France; CHU Clermont-Ferrand, Service de Nutrition Clinique, F-63003 CLERMONT-FERRAND, Cedex, France
| | - Stéphane Walrand
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 CLERMONT-FERRAND, Cedex, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 CLERMONT-FERRAND, Cedex, France.
| |
Collapse
|
7
|
De-Mateo-Silleras B, Alonso-Torre SR, Redondo-del-Río P, Jeejeebhoy K, Miján-de-la-Torre A. Effect of nutritional support on mitochondrial complex I activity in malnourished patients with anorexia nervosa. Appl Physiol Nutr Metab 2013; 38:1093-8. [DOI: 10.1139/apnm-2013-0082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previous studies have shown a reduction in lymphocyte mitochondrial complex I activity (CIA) in malnourished patients, which is restored after refeeding. Our aim was to evaluate the usefulness of CIA as an indicator of nutritional status in anorexia nervosa patients. Twelve malnourished anorexia nervosa females (mean age, 24.5 years) were admitted to the Eating Disorders Unit. Basal and weekly anthropometrics, bioelectric impedance (BIA), body composition, and CIA were performed until discharge. Patients were matched to 25 healthy females and refeeding was adjusted according to the Unit’s protocol. Statistics were used as appropriated and significance was reached at p < 0.05. Patients showed a significant reduction in body mass index, fat mass and fat free mass (FFM), triceps skinfold, and waist circumference on admission as compared with the control group. Parameters improved during hospitalization, but they failed to reach normal values at discharge. Compared with controls, CIA was significantly lower in patients on admission (2.16 vs. 5.68 nmol·min−1·mg protein−1). Refeeding and weight gain did not restore CIA. A positive association (r2= 0.69) was found between FFM and CIA in patients at discharge. Malnourished females with anorexia nervosa have lower CIA than controls that is not recovered after refeeding. This could be because of a low FFM exacerbated by physical inactivity while in hospital.
Collapse
Affiliation(s)
- Beatriz De-Mateo-Silleras
- Research Unit, Complejo Asistencial Universitario de Burgos, C/Islas Baleares 3, 09006 – Burgos, Spain
| | - Sara R. Alonso-Torre
- Nutrition and Bromatology Area, Faculty of Sciences, University of Burgos, Plaza de Misael Bañuelos s/n, 09001 – Burgos, Spain
| | - Paz Redondo-del-Río
- Nutrition and Bromatology Area, Faculty of Medicine, University of Valladolid, C/Ramón y Cajal 7, 47005 – Valladolid, Spain
| | | | - Alberto Miján-de-la-Torre
- Nutrition and Bromatology Area, Faculty of Medicine, University of Valladolid, C/Ramón y Cajal 7, 47005 – Valladolid, Spain
- Service of Internal Medicine–Unit of Clinical Nutrition, Complejo Asistencial Universitario de Burgos, C/Islas Baleares 3, 09006 – Burgos, Spain
| |
Collapse
|
8
|
Mohamed TM, Salama AF, El Nimr TM, El Gamal DM. Effects of phytate on thyroid gland of rats intoxicated with cadmium. Toxicol Ind Health 2013; 31:1258-68. [PMID: 23796758 DOI: 10.1177/0748233713485887] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cadmium (Cd) is one of the most dangerous occupational and environmental toxins. The objective of the present study is to examine the potential prophylactic effects of phytic acid (PA) on thyroid hormones of male rats intoxicated with Cd. The male albino rats were divided into five groups: group I (control) was fed with the basal diet, group II was intoxicated with Cd in drinking water, groups III, IV, and V were intoxicated with Cd in drinking water and fed with the diet containing 3.5, 7, and 10 g of PA/kg, respectively. The results indicated that the serum calcium, iron (Fe), and total Fe binding capacity levels and serum T3 and T4 in Cd-treated rats of group II were decreased when compared with the control group, while PA-administered groups with Cd showed a significant improvement when compared with the Cd-treated rats only. Serum thyroid stimulating hormone (TSH) level was significantly increased in Cd-treated rats compared with the control group, while the addition of PA in diet decreased the high levels of TSH. These results indicated a prophylactic effect of PA against Cd-induced toxicity in rats.
Collapse
Affiliation(s)
- Tarek Mostafa Mohamed
- Biochemistry Division, Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
| | - Afrah F Salama
- Biochemistry Division, Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
| | - Tarek M El Nimr
- Biophysics Division, Physics Department, Faculty of Science, Tanta University, Tanta, Egypt
| | - Doaa M El Gamal
- Biochemistry Division, Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
| |
Collapse
|
9
|
Norman K, Stobäus N, Gonzalez MC, Schulzke JD, Pirlich M. Hand grip strength: outcome predictor and marker of nutritional status. Clin Nutr 2010; 30:135-42. [PMID: 21035927 DOI: 10.1016/j.clnu.2010.09.010] [Citation(s) in RCA: 605] [Impact Index Per Article: 43.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 09/10/2010] [Accepted: 09/23/2010] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS Among all muscle function tests, measurement of hand grip strength has gained attention as a simple, non-invasive marker of muscle strength of upper extremities, well suitable for clinical use. This review outlines the prognostic relevance of grip strength in various clinical and epidemiologic settings and investigates its suitability as marker of nutritional status in cross-sectional as well as intervention studies. METHODS Studies investigating grip strength as prognostic marker or nutritional parameter in cross-sectional or intervention studies were summarized. RESULTS AND CONCLUSIONS Numerous clinical and epidemiological studies have shown the predictive potential of hand grip strength regarding short and long-term mortality and morbidity. In patients, impaired grip strength is an indicator of increased postoperative complications, increased length of hospitalization, higher rehospitalisation rate and decreased physical status. In elderly in particular, loss of grip strength implies loss of independence. Epidemiological studies have moreover demonstrated that low grip strength in healthy adults predicts increased risk of functional limitations and disability in higher age as well as all-cause mortality. As muscle function reacts early to nutritional deprivation, hand grip strength has also become a popular marker of nutritional status and is increasingly being employed as outcome variable in nutritional intervention studies.
Collapse
Affiliation(s)
- Kristina Norman
- Department of Gastroenterology, Hepatology and Endocrinology, Charité-University Medicine Berlin, Berlin, Germany.
| | | | | | | | | |
Collapse
|
10
|
Novaes RD, Miranda ASD, Silva JDO, Tavares BVF, Dourado VZ. Equações de referência para a predição da força de preensão manual em brasileiros de meia idade e idosos. FISIOTERAPIA E PESQUISA 2009. [DOI: 10.1590/s1809-29502009000300005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
O objetivo deste estudo foi avaliar os valores normais da força de preensão manual do membro superior dominante (FPM-D) e não dominante (FPM-ND) em sujeitos de meia idade e idosos assintomáticos e elaborar equações de referência para a predição da FPM. Foram investigados 54 voluntários (51,9% homens) com idade >50 anos, medindo-se massa corporal, estatura e perimetria do braço direito e esquerdo, e calculando-se o índice de massa corporal. A FPM-D e FPM -ND foram avaliadas por dinamometria mecânica. O índice de atividade física habitual (IAF) foi avaliado pelo questionário de Baecke. A FPM-D foi superior à FPM-ND em ambos os sexos e em todas as idades (p<0,05). Foram encontradas correlações significativas entre a FPM e idade, estatura, massa corporal e perimetria do braço. As melhores equações de referência foram as seguintes: FPM-Dkgf =39,996 - (0,382 x idade anos)+(0,174 x peso kg)+(13,628 x sexo homens=1;mulheres=0) (R²ajustado=0,677); e FPM-NDkgf=44,968- (0,420 x idade anos)+(0,110 x peso kg)+(9,274 x sexo homens=1;mulheres=0) (R²ajustado=0,546) A diferença consistente entre a FPM-D e FPM-ND torna necessário o uso de dados normativos específicos para cada mão. Atributos simples de serem obtidos, tais como idade, estatura, massa corporal, perimetria do braço e sexo, podem pois prever adequadamente os valores esperados da FPM para adultos e idosos assintomáticos.
Collapse
|
11
|
Awad S, Constantin-Teodosiu D, Macdonald IA, Lobo DN. Short-term starvation and mitochondrial dysfunction - a possible mechanism leading to postoperative insulin resistance. Clin Nutr 2009; 28:497-509. [PMID: 19446932 DOI: 10.1016/j.clnu.2009.04.014] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Revised: 03/27/2009] [Accepted: 04/10/2009] [Indexed: 12/15/2022]
Abstract
BACKGROUND Preoperative starvation results in the development of insulin resistance. Measures to attenuate the development of insulin resistance, such as preoperative carbohydrate loading, lead to clinical benefits. However, the mechanisms that underlie the development of insulin resistance during starvation and its attenuation by preoperative carbohydrate loading remain to be defined. Insulin resistance associated with type 2 diabetes and ageing has been linked to mitochondrial dysfunction. The metabolic consequences of preoperative starvation and carbohydrate loading and mechanisms linking insulin resistance to impaired mitochondrial function are discussed. METHODS Searches of the Medline and Science Citation Index databases were performed using various key words in combinations with the Boolean operators AND, OR and NOT. Key journals, nutrition and metabolism textbooks and the reference lists of key articles were also hand searched. RESULTS Animal studies have shown that short-term energy deprivation decreases mitochondrial ATP synthesis capacity and complex activity, and increases oxidative injury. Furthermore, evidence from human studies suggests that the development of insulin resistance during starvation may be linked to impaired mitochondrial function. CONCLUSIONS There is evidence from animal studies that short-term starvation causes mitochondrial dysfunction. Future studies should investigate whether mitochondrial dysfunction underlies the development of insulin resistance in patients undergoing elective surgery.
Collapse
Affiliation(s)
- Sherif Awad
- Division of Gastrointestinal Surgery, Nottingham Digestive Diseases Centre Biomedical Research Unit, Nottingham University Hospitals, Queen's Medical Centre, Nottingham, UK
| | | | | | | |
Collapse
|
12
|
Kasanen IHE, Inhilä KJ, Nevalainen JI, Väisänen SB, Mertanen AMO, Mering SM, Nevalainen TO. A novel dietary restriction method for group-housed rats: weight gain and clinical chemistry characterization. Lab Anim 2009; 43:138-48. [DOI: 10.1258/la.2008.008023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Laboratory rodents are usually fed ad libitum. Moderate dietary restriction decreases mortality and morbidity compared with ad libitum feeding. There are, however, problems in achieving dietary restriction. Traditional methods of restricted feeding may interfere with the diurnal rhythms of the animals and are not compatible with group-housing of rodents. We have invented a novel method, the diet board, for restricting the feed intake of laboratory rats. The use of the diet board moderately decreased weight gain of rats when compared with ad libitum-fed animals. The diet board retarded skeletal growth only minimally, whereas major differences were found in body fat depositions. Serum free fatty acid, triglyceride and cholesterol values were lower in diet-restricted rats, while the opposite was true for serum creatine kinase. There were no differences in total protein, albumin or alanine aminotransferase. Moreover, differences in interindividual variances in parameters were not detected between the groups; hence this study could not combine the diet board with reduction potential. The diet board provides mild to moderate dietary restriction for group-housed rats and is unlikely to interfere with the diurnal eating rhythm. The diet board can also be seen as a cage furniture item, dividing the open cage space and increasing the structural complexity of the environment. In conclusion, the diet board appears to possess refinement potential when compared with traditional methods of dietary restriction.
Collapse
Affiliation(s)
- I H E Kasanen
- National Laboratory Animal Center, University of Kuopio, PO Box 1627, FI-70211, Kuopio, Finland
| | - K J Inhilä
- National Laboratory Animal Center, University of Kuopio, PO Box 1627, FI-70211, Kuopio, Finland
| | - J I Nevalainen
- Tampere School of Public Health, University of Tampere, Tampere, Finland
| | - S B Väisänen
- Eastern Finland Laboratory Center, Kuopio, Finland
| | - A M O Mertanen
- National Laboratory Animal Center, University of Kuopio, PO Box 1627, FI-70211, Kuopio, Finland
| | - S M Mering
- National Laboratory Animal Center, University of Kuopio, PO Box 1627, FI-70211, Kuopio, Finland
| | - T O Nevalainen
- National Laboratory Animal Center, University of Kuopio, PO Box 1627, FI-70211, Kuopio, Finland
- Department of Basic Veterinary Sciences, University of Helsinki, Helsinki, Finland
| |
Collapse
|
13
|
Calderón-Cortés E, Cortés-Rojo C, Clemente-Guerrero M, Manzo-Avalos S, Villalobos-Molina R, Boldogh I, Saavedra-Molina A. Changes in mitochondrial functionality and calcium uptake in hypertensive rats as a function of age. Mitochondrion 2008; 8:262-72. [PMID: 18541459 DOI: 10.1016/j.mito.2008.04.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2007] [Revised: 03/13/2008] [Accepted: 04/28/2008] [Indexed: 11/28/2022]
Abstract
We studied whether mitochondrial functions and Ca2+ metabolism were altered in Wistar Kyoto normotensive (WKY) and spontaneous hypertensive rats (SHR). Ca2+ uptake was decreased in SHR compared to WKY rats. Accumulation of Ca2+ was more efficient in WKY than in SHR rats. mDeltaPsi was lower in SHR compared to WKY rats. Basal complex IV activity was higher in SHR than WKY rats, whereas basal L-citrulline production, an indicator of nitric oxide synthesis, was decreased in SHR and dependent on Ca2+ concentration (p<0.05). Impact of Ca2+ was counteracted by EGTA. These data show an age-dependent decreased mitochondrial functions in brain mitochondria during hypertension.
Collapse
Affiliation(s)
- E Calderón-Cortés
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B-3. C.U., Morelia, Mich. 58030, Mexico
| | | | | | | | | | | | | |
Collapse
|
14
|
Varma H, Cheng R, Voisine C, Hart AC, Stockwell BR. Inhibitors of metabolism rescue cell death in Huntington's disease models. Proc Natl Acad Sci U S A 2007; 104:14525-30. [PMID: 17726098 PMCID: PMC1964858 DOI: 10.1073/pnas.0704482104] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Huntington's disease (HD) is a fatal inherited neurodegenerative disorder. HD is caused by polyglutamine expansions in the huntingtin (htt) protein that result in neuronal loss and contribute to HD pathology. The mechanisms of neuronal loss in HD are elusive, and there is no therapy to alleviate HD. To find small molecules that slow neuronal loss in HD, we screened 1,040 biologically active molecules to identify suppressors of cell death in a neuronal cell culture model of HD. We found that inhibitors of mitochondrial function or glycolysis rescued cell death in this cell culture and in in vivo HD models. These inhibitors prevented cell death by activating prosurvival ERK and AKT signaling but without altering cellular ATP levels. ERK and AKT inhibition through the use of specific chemical inhibitors abrogated the rescue, whereas their activation through the use of growth factors rescued cell death, suggesting that this activation could explain the protective effect of metabolic inhibitors. Both ERK and AKT signaling are disrupted in HD, and activating these pathways is protective in several HD models. Our results reveal a mechanism for activating prosurvival signaling that could be exploited for treating HD and possibly other neurodegenerative disorders.
Collapse
Affiliation(s)
| | | | - Cindy Voisine
- Department of Pathology, Massachusetts General Hospital Center for Cancer Research and Harvard Medical School, Charlestown, MA 02129
| | - Anne C. Hart
- Department of Pathology, Massachusetts General Hospital Center for Cancer Research and Harvard Medical School, Charlestown, MA 02129
| | - Brent R. Stockwell
- Departments of *Biological Sciences and
- Chemistry, Fairchild Center, MC 2406, Columbia University, 1212 Amsterdam Avenue, New York, NY 10027; and
- To whom correspondence should be addressed. E-mail:
| |
Collapse
|
15
|
Colom B, Alcolea MP, Valle A, Oliver J, Roca P, García-Palmer FJ. Skeletal muscle of female rats exhibit higher mitochondrial mass and oxidative-phosphorylative capacities compared to males. Cell Physiol Biochem 2007; 19:205-12. [PMID: 17310114 DOI: 10.1159/000099208] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2006] [Indexed: 01/26/2023] Open
Abstract
The effect of gender and caloric restriction on mitochondrial content and oxidative-phosphorylative capacities has been investigated in rat gastrocnemius muscle. Muscle protein, mitochondrial protein and DNA contents, enzymatic activities of mitochondrial oxidative and phosphorylative system, mitochondrial antioxidant enzymes, protein levels of complex IV (subunit I and IV) and ATPase, and the gene and protein expression of mitochondrial transcription factor A (TFAM), involved in mitochondrial replication and transcription, were measured in rats of both genders fed ad libitum and subjected to three months of 40% caloric restriction. Compared to males, gastrocnemius muscle of female rats showed higher mitochondrial DNA and protein contents, TFAM protein level, oxidative and phosphorylative machinery and activities, and glutathione peroxidase activity. In conclusion, the present data show a clear gender dimorphism in rat muscle mitochondrial features, which could explain the higher facility of females to adapt to altered metabolic energy situations.
Collapse
Affiliation(s)
- Bartomeu Colom
- Grup de Metabolisme Energètic i Nutrició. Departament de Biología Fonamental i Ciències de la Salut. Institut Universitari d'Investigació en Ciències de la Salut (IUNICS). Universitat de les Illes Balears, E-07122 Palma de Mallorca, Spain
| | | | | | | | | | | |
Collapse
|
16
|
Johnson G, Roussel D, Dumas JF, Douay O, Malthièry Y, Simard G, Ritz P. Influence of intensity of food restriction on skeletal muscle mitochondrial energy metabolism in rats. Am J Physiol Endocrinol Metab 2006; 291:E460-7. [PMID: 16621897 DOI: 10.1152/ajpendo.00258.2005] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Variable durations of food restriction (FR; lasting weeks to years) and variable FR intensities are applied to animals in life span-prolonging studies. A reduction in mitochondrial proton leak is suggested as a putative mechanism linking such diet interventions and aging retardation. Early mechanisms of mitochondrial metabolic adaptation induced by FR remain unclear. We investigated the influence of different degrees of FR over 3 days on mitochondrial proton leak and mitochondrial energy metabolism in rat hindlimb skeletal muscle. Animals underwent 25, 50, and 75% and total FR compared with control rats. Proton leak kinetics and mitochondrial functions were investigated in two mitochondrial subpopulations, intermyofibrillar (IMF) and subsarcolemmal (SSM) mitochondria. Regardless of the degree of restriction, skeletal muscle mass was not affected by 3 days of FR. Mitochondrial basal proton conductance was significantly decreased in 50% restricted rats in both mitochondrial subpopulations (46 and 40% for IMF and SSM, respectively) but was unaffected in other groups compared with controls. State 3 and uncoupled state 3 respiration rates were decreased in SSM mitochondria only for 50% restricted rats when pyruvate + malate was used as substrate (-34.5 and -38.9% compared with controls, P < 0.05). IMF mitochondria respiratory rates remained unchanged. Three days of FR, particularly at 50% FR, were sufficient to lower mitochondria energetic metabolism in both mitochondrial populations. Our study highlights an early step in mitochondrial adaptation to FR and the influence of the severity of restriction on this adaptation. This step may be involved in an aging-retardation process.
Collapse
Affiliation(s)
- Gyasi Johnson
- Institut National de la Santé et de la Recherche Médicale, Unité 694, Université d'Angers, F-49033 Angers Cedex 01, France
| | | | | | | | | | | | | |
Collapse
|
17
|
Guillet C, Zangarelli A, Mishellany A, Rousset P, Sornet C, Dardevet D, Boirie Y. Mitochondrial and sarcoplasmic proteins, but not myosin heavy chain, are sensitive to leucine supplementation in old rat skeletal muscle. Exp Gerontol 2004; 39:745-51. [PMID: 15130669 DOI: 10.1016/j.exger.2004.02.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2003] [Revised: 02/16/2004] [Accepted: 02/20/2004] [Indexed: 10/26/2022]
Abstract
Leucine has a major anabolic impact on muscle protein synthesis in young as in old animals. However, myosin heavy chain (MHC), sarcoplasmic and mitochondrial proteins may differently respond to anabolic factors, especially during aging. To test this hypothesis, fractional synthesis rates (FSR) of the three muscle protein fractions were measured using a flooding dose of [1-(13)C] phenylalanine, in gastrocnemius muscle of adult (8 months) and old (22 months) rats, either in postabsorptive state (PA), or 90-120 min after ingestion of a alanine-supplemented meal (PP+A) or a leucine-supplemented meal (PP+L). In adult and old rats, in comparison with PA, leucine stimulated mitochondrial (adult: 0.260+/-0.011 vs 0.238+/-0.012%h(-1); old: 0.289+/-0.010 vs 0.250+/-0.010%h(-1); PP+L vs PA, P<0.05) and sarcoplasmic (adult: 0.182+/-0.011 vs 0.143+/-0.006%h(-1); old: 0.195+/-0.010 vs 0.149+/-0.008%h(-1); PP+L vs PA, P<0.05) protein FSR, but not MHC synthesis in old rats (0.101+/-0.009 vs 0.137+/-0.018%h(-1); PP+L vs PA, P=NS). In conclusion, synthesis of specific muscle protein is activated by leucine supplementation, but MHC may be less sensitive to anabolic factors with aging.
Collapse
Affiliation(s)
- Christelle Guillet
- Laboratoire de Nutrition Humaine, Centre de Recherche en Nutrition Humaine, Unité du Métabolisme Protéino-Energétique, UMR Université d'Auvergne-INRA, Centre Hospitalier Universitaire, BP 321, 58 rue Montalembert, 63009 Clermont-Ferrand cedex 1, France
| | | | | | | | | | | | | |
Collapse
|