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Li C, Yang Q, Zhang L. Identification of putative allosteric inhibitors of BCKDK via virtual screening and biological evaluation. J Enzyme Inhib Med Chem 2024; 39:2290458. [PMID: 38059302 DOI: 10.1080/14756366.2023.2290458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 11/21/2023] [Indexed: 12/08/2023] Open
Abstract
Abnormal accumulation of branched-chain amino acids (BCAAs) can lead to metabolic diseases and cancers. Branched-chain α-keto acid dehydrogenase kinase (BCKDK) is a key negative regulator of BCAA catabolism, and targeting BCKDK provides a promising therapeutic approach for diseases caused by BCAA accumulation. Here, we screened PPHN and POAB as novel putative allosteric inhibitors by integrating allosteric binding site prediction, large-scale ligand database virtual screening, and bioactivity evaluation assays. Both of them showed a high binding affinity to BCKDK, with Kd values of 3.9 μM and 1.86 μM, respectively. In vivo experiments, the inhibitors demonstrated superior kinase inhibitory activity and notable antiproliferative and proapoptotic effects on diverse cancer cells. Finally, bulk RNA-seq analysis revealed that PPHN and POAB suppressed cell growth through a range of signalling pathways. Taken together, our findings highlight two novel BCKDK inhibitors as potent therapeutic candidates for metabolic diseases and cancers associated with BCAA dysfunctional metabolism.
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Affiliation(s)
- Chunqiong Li
- Genomics Center, Chinese Institute for Brain Research, Beijing, China
| | - Quanjun Yang
- Department of Pharmacy, Shanghai Sixth People's Hospital Affiliated Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li Zhang
- Genomics Center, Chinese Institute for Brain Research, Beijing, China
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2
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Li Z, Tong X, Ma Y, Bao T, Yue J. Association between the triglyceride glucose index and low skeletal muscle mass: a cross-sectional study. BMJ Open 2024; 14:e077484. [PMID: 38195175 PMCID: PMC10806592 DOI: 10.1136/bmjopen-2023-077484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 12/21/2023] [Indexed: 01/11/2024] Open
Abstract
OBJECTIVES Triglyceride glucose (TyG) represents a consistent surrogate biomarker and index of insulin resistance (IR), IR has also been linked to skeletal muscle mass loss (SMM-L). Here, we evaluated the association between SMM-L and the TyG index (TyGi). DESIGN An analytical cross-sectional study. SETTING Tertiary care hospitals. PARTICIPANTS 36 275 participants who underwent health checks between 1 January 2013 and 31 December 2020. PRIMARY AND SECONDARY OUTCOME MEASURES A bioelectrical impedance analysis was used to assess the body composition, SMM-L was defined as low ASMI (total limb lean mass/height2) and TyGi was calculated as ln(triglycerides (mg/dL)×fasting blood glucose (mg/dL)/2). RESULTS A total of 36 275 subjects were included in the study, of which 58.46% were male, with a mean age of 43.74±12.33 years. The prevalence of low skeletal muscle mass (SMM) was 17.7% and the mean TyGi was 8.56±0.64. TyGi was found to be significantly correlated with low SMM in all subjects (OR 1.87, 95% CI 1.75 to 2.00, p<0.001), with higher correlations seen in younger subjects (OR 1.97, 95% CI 1.77 to 2.20, p<0.001), and remaining significant in middle age (OR 1.95, 95% CI 1.77 to 2.14, p<0.001), old age (OR 1.73, 95% CI 1.38 to 1.16, p<0.001), men (OR 1.60, 95% CI 1.46 to 1.76, p<0.001) and women (OR 2.59, 95% CI 2.39 to 2.87, p<0.001). CONCLUSIONS These data demonstrated a significant independent interaction between TyGi and low SMM in all subjects regardless of sex and age subgroups in the general population.
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Affiliation(s)
- Zhenzhen Li
- Health Management Center, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Xiang Tong
- Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Yao Ma
- Department of Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Ting Bao
- Health Management Center, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Jirong Yue
- Department of Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan, China
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3
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Paczkowska K, Rachoń D, Berg A, Rybka J, Kapczyńska K, Bolanowski M, Daroszewski J. Alteration of Branched-Chain and Aromatic Amino Acid Profile as a Novel Approach in Studying Polycystic Ovary Syndrome Pathogenesis. Nutrients 2023; 15:4153. [PMID: 37836437 PMCID: PMC10574162 DOI: 10.3390/nu15194153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/14/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is a common endocrine disorder that affects reproductive-age women and predisposes them to the development of metabolic disturbances. Recent research has shown that several metabolic factors may play a role in PCOS pathogenesis, and it has been suggested that an alteration in the amino acid profile might be a predictive sign of metabolic disorders. Metabolically healthy obesity (MHO) and metabolically unhealthy obesity (MUO) are concepts that have attracted scientific attention; however, a universal definition has not been established yet for these terms. Already existing definitions of MHO involve the coexistence of obesity with the absence or minimal presence of other metabolic syndrome parameters. A group of 326 women, 209 diagnosed with PCOS and 117 healthy individuals, participated in this study. Multiple parameters were assessed, including anthropometrical, biochemical, and hormonal ones, and gas-liquid chromatography, combined with tandem mass spectrometry, was used to investigate the amino acid profile. Statistical analysis revealed noticeably higher levels of all aromatic amino acids in PCOS women compared to the control group: phenylalanine 47.37 ± 7.0 vs. 45.4 ± 6.09 nmol/mL (p = 0.01), tyrosine 61.69 ± 9.56 vs. 58.08 ± 8.89 nmol/mL (p < 0.01), and tryptophan 53.66 ± 11.42 vs. 49.81 ± 11.18 nmol/mL (p < 0.01); however, there was no significant difference in the "tryptophan ratio" between the PCOS and control group (p = 0.88). A comparison of MHO and MUO PCOS women revealed that LAP, leucine, and isoleucine concentrations were significantly higher among the MUO subgroup: respectively, 101.98 ± 34.74 vs. 55.80 ± 24.33 (p < 0.001); 153.26 ± 22.26 vs. 137.25 ± 25.76 nmol/mL (p = 0.04); and 92.92 ± 16.09 vs. 82.60 ± 18.70 nmol/mL (p = 0.02). No significant differences in BMI, fasting glucose, and HOMA-IR between MHO and MUO were found: respectively, 35.0 ± 4.8 vs. 36.1 ± 4.6 kg/m2 (p = 0.59); 88.0 ± 6.0 vs. 87.73 ± 6.28 mg/dL (p = 0.67); and 3.36 ± 1.70 vs. 4.17 ± 1.77 (p = 0.1). The identification of altered amino acid profiles in PCOS holds potential clinical implications. Amino acids may serve as biomarkers for diagnosing and monitoring the metabolic status of individuals with PCOS. The alteration of BCAAs and AAAs may be involved in PCOS pathogenesis, but the underlying mechanism should be further investigated.
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Affiliation(s)
- Katarzyna Paczkowska
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, 50-367 Wroclaw, Poland; (K.P.)
| | - Dominik Rachoń
- Department of Clinical and Experimental Endocrinology, Medical University of Gdansk, 80-211 Gdansk, Poland
| | - Andrzej Berg
- Department of Pharmaceutical Chemistry, Medical University of Gdansk, 80-416 Gdansk, Poland
| | - Jacek Rybka
- Laboratory of Medical Microbiology, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wroclaw, Poland
| | - Katarzyna Kapczyńska
- Laboratory of Medical Microbiology, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wroclaw, Poland
| | - Marek Bolanowski
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, 50-367 Wroclaw, Poland; (K.P.)
| | - Jacek Daroszewski
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, 50-367 Wroclaw, Poland; (K.P.)
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4
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Nasri M, Adibhesami G, Mahdavifard S, Babaeenezhad E, Ahmadvand H. Exogenous glutamine ameliorates diabetic nephropathy in a rat model of type 2 diabetes mellitus through its antioxidant and anti-inflammatory activities. Arch Physiol Biochem 2023; 129:363-372. [PMID: 33021829 DOI: 10.1080/13813455.2020.1828478] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This study aimed to evaluate the effects of glutamine (Gln) on diabetic nephropathy and other complications in a rat model of type 2 diabetes mellitus. Streptozotocin/nicotinamide induced diabetic rats were enrolled as an animal model of type 2 diabetes mellitus. Animals were divided into control, diabetic, and Gln (1000 mg/l in drinking water, eight weeks) treated diabetic groups. Gln alleviated renal inflammatory and oxidative stress biomarkers (tumour necrosis factor-alpha, interleukin 6, glutathione peroxidase, total superoxide dismutase, and glutathione), decreased serum uric acid and creatinine, and restored renal histopathological changes (glomerular volume, sclerosis, and leukocyte infiltration). Additionally, Gln ameliorated other complications, including systemic oxidative stress (serum malondialdehyde and nitric oxide, serum and liver glutathione, glutathione peroxidase, and total superoxide dismutase, and liver catalase), insulin resistance, hyperglycaemia, and hyperlipidaemia. Collectively, Gln attenuates diabetic nephropathy and other complications in type 2 diabetes mellitus in rats through its antioxidant and anti-inflammatory activities.
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Affiliation(s)
- Maryam Nasri
- Razi Herbal Medicine Research Center, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
- Department of Biochemistry and Genetics, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Glavizh Adibhesami
- Department of Biochemistry and Genetics, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Sina Mahdavifard
- Department of Clinical Biochemistry, Faculty of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Esmaeel Babaeenezhad
- Department of Biochemistry, School of Medicine, Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hassan Ahmadvand
- Razi Herbal Medicine Research Center, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
- Department of Biochemistry and Genetics, Lorestan University of Medical Sciences, Khorramabad, Iran
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5
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Sanches JM, Zhao LN, Salehi A, Wollheim CB, Kaldis P. Pathophysiology of type 2 diabetes and the impact of altered metabolic interorgan crosstalk. FEBS J 2023; 290:620-648. [PMID: 34847289 DOI: 10.1111/febs.16306] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 10/14/2021] [Accepted: 11/29/2021] [Indexed: 02/06/2023]
Abstract
Diabetes is a complex and multifactorial disease that affects millions of people worldwide, reducing the quality of life significantly, and results in grave consequences for our health care system. In type 2 diabetes (T2D), the lack of β-cell compensatory mechanisms overcoming peripherally developed insulin resistance is a paramount factor leading to disturbed blood glucose levels and lipid metabolism. Impaired β-cell functions and insulin resistance have been studied extensively resulting in a good understanding of these pathways but much less is known about interorgan crosstalk, which we define as signaling between tissues by secreted factors. Besides hormones and organokines, dysregulated blood glucose and long-lasting hyperglycemia in T2D is associated with changes in metabolism with metabolites from different tissues contributing to the development of this disease. Recent data suggest that metabolites, such as lipids including free fatty acids and amino acids, play important roles in the interorgan crosstalk during the development of T2D. In general, metabolic remodeling affects physiological homeostasis and impacts the development of T2D. Hence, we highlight the importance of metabolic interorgan crosstalk in this review to gain enhanced knowledge of the pathophysiology of T2D, which may lead to new therapeutic approaches to treat this disease.
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Affiliation(s)
| | - Li Na Zhao
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Albert Salehi
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Claes B Wollheim
- Department of Clinical Sciences, Lund University, Malmö, Sweden.,Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
| | - Philipp Kaldis
- Department of Clinical Sciences, Lund University, Malmö, Sweden
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6
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Trinh B, Peletier M, Simonsen C, Plomgaard P, Karstoft K, Pedersen BK, van Hall G, Ellingsgaard H. Amino Acid Metabolism and Protein Turnover in Lean and Obese Humans During Exercise-Effect of IL-6 Receptor Blockade. J Clin Endocrinol Metab 2022; 107:1854-1864. [PMID: 35442403 DOI: 10.1210/clinem/dgac239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Indexed: 11/19/2022]
Abstract
CONTEXT Interleukin-6 (IL-6) is implicated in skeletal muscle wasting and in regulating skeletal muscle hypertrophy in the healthy state. OBJECTIVE This work aimed to determine the role of IL-6 in regulating systemic protein and amino acid metabolism during rest, exercise, and recovery in lean and obese humans. METHODS In a nonrandomized, single-blind design, 12 lean and 9 obese individuals were infused first with 0.9% saline (Saline), secondly with the IL-6 receptor antibody tocilizumab (Acute IL-6R ab), and 21 days later with saline while still under tocilizumab influence (Chronic IL-6R ab). Outcome measures were determined before, during, and after 90 minutes of exercise at 40% Wattmax by isotope dilution technique, using primed continuous infusion of L-[ring-D5]phenylalanine and L-[D2]tyrosine. Main outcomes measures included systemic protein turnover and plasma amino acid concentrations. RESULTS We saw no effect of acute or chronic IL-6 receptor blockade on protein turnover. In lean individuals, chronic IL-6 receptor blockade increased plasma concentrations of total amino acids (rest Δ + 186 μmol/L; 95% CI, 40-332; recovery Δ + 201 μmol/L; 95% CI, 55-347) and essential amino acids (rest Δ + 43 μmol/L; 95% CI, 12-76; recovery Δ + 45 μmol/L; 95% CI, 13-77) independently of exercise but had no such effect in obese individuals (total amino acids rest Δ + 63 μmol/L; 95% CI, -170 to 295, recovery Δ - 23 μmol/L, 95% CI, -256 to 210; essential amino acids rest Δ + 26 μmol/L; 95% CI, -21 to 73, recovery Δ + 11 μmol/L; 95% CI, -36 to 58). CONCLUSION IL-6 receptor blockade has no effect on protein turnover in fasting lean and obese humans during rest, exercise, and recovery. Chronic IL-6 receptor blockade increases total and essential amino acid concentrations only in lean individuals.
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Affiliation(s)
- Beckey Trinh
- The Centre for Physical Activity Research, Rigshospitalet, Section 7641, Copenhagen 2100, Denmark
| | - Merel Peletier
- The Centre for Physical Activity Research, Rigshospitalet, Section 7641, Copenhagen 2100, Denmark
| | - Casper Simonsen
- The Centre for Physical Activity Research, Rigshospitalet, Section 7641, Copenhagen 2100, Denmark
| | - Peter Plomgaard
- The Centre for Physical Activity Research, Rigshospitalet, Section 7641, Copenhagen 2100, Denmark
- Department of Clinical Biochemistry, Rigshospitalet, Copenhagen 2100, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen 2100, Denmark
| | - Kristian Karstoft
- The Centre for Physical Activity Research, Rigshospitalet, Section 7641, Copenhagen 2100, Denmark
- Department of Clinical Pharmacology, Bispebjerg-Frederiksberg Hospital, Copenhagen 2400, Denmark
| | - Bente Klarlund Pedersen
- The Centre for Physical Activity Research, Rigshospitalet, Section 7641, Copenhagen 2100, Denmark
| | - Gerrit van Hall
- Department of Clinical Biochemistry, Rigshospitalet, Copenhagen 2100, Denmark
- Clinical Metabolomics Core Facility, Rigshospitalet, Copenhagen 2100, Denmark
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Helga Ellingsgaard
- The Centre for Physical Activity Research, Rigshospitalet, Section 7641, Copenhagen 2100, Denmark
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7
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Bishop CA, Machate T, Henning T, Henkel J, Püschel G, Weber D, Grune T, Klaus S, Weitkunat K. Detrimental effects of branched-chain amino acids in glucose tolerance can be attributed to valine induced glucotoxicity in skeletal muscle. Nutr Diabetes 2022; 12:20. [PMID: 35418570 PMCID: PMC9008040 DOI: 10.1038/s41387-022-00200-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 03/25/2022] [Accepted: 03/29/2022] [Indexed: 12/04/2022] Open
Abstract
Objective Current data regarding the roles of branched-chain amino acids (BCAA) in metabolic health are rather conflicting, as positive and negative effects have been attributed to their intake. Methods To address this, individual effects of leucine and valine were elucidated in vivo (C57BL/6JRj mice) with a detailed phenotyping of these supplementations in high-fat (HF) diets and further characterization with in vitro approaches (C2C12 myocytes). Results Here, we demonstrate that under HF conditions, leucine mediates beneficial effects on adiposity and insulin sensitivity, in part due to increasing energy expenditure—likely contributing partially to the beneficial effects of a higher milk protein intake. On the other hand, valine feeding leads to a worsening of HF-induced health impairments, specifically reducing glucose tolerance/insulin sensitivity. These negative effects are driven by an accumulation of the valine-derived metabolite 3-hydroxyisobutyrate (3-HIB). Higher plasma 3-HIB levels increase basal skeletal muscle glucose uptake which drives glucotoxicity and impairs myocyte insulin signaling. Conclusion These data demonstrate the detrimental role of valine in an HF context and elucidate additional targetable pathways in the etiology of BCAA-induced obesity and insulin resistance. ![]()
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Affiliation(s)
- Christopher A Bishop
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany. .,University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany.
| | - Tina Machate
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany.,University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Thorsten Henning
- University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany.,Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Janin Henkel
- University of Potsdam, Institute of Nutrition Science, Nutritional Biochemistry Dept, Nuthetal, 14558, Germany.,University of Bayreuth, Faculty of Life Science, Department of Nutritional Biochemistry, Kulmbach, 95326, Germany
| | - Gerhard Püschel
- University of Potsdam, Institute of Nutrition Science, Nutritional Biochemistry Dept, Nuthetal, 14558, Germany
| | - Daniela Weber
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Tilman Grune
- University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany.,Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Susanne Klaus
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany.,University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Karolin Weitkunat
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany
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Rondanelli M, Peroni G, Giacosa A, Fazia T, Bernardinelli L, Naso M, Faliva MA, Tartara A, Gasparri C, Perna S. Effectiveness of Rice Germ Supplementation on Body Composition, Metabolic Parameters, Satiating Capacity, and Amino Acid Profiles in Obese Postmenopausal Women: A Randomized, Controlled Clinical Pilot Trial. Nutrients 2021; 13:nu13020439. [PMID: 33572825 PMCID: PMC7911912 DOI: 10.3390/nu13020439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 01/21/2021] [Accepted: 01/25/2021] [Indexed: 11/29/2022] Open
Abstract
Rice germ (RG) may be a safe and effective dietary supplement for obesity in menopause, considering its high protein content and considerable amounts of essential amino acids, good fatty acids, and fiber. This pilot randomized, blinded, parallel-group, placebo-controlled pilot trial investigated the effectiveness of 4-weeks RG supplementation (25 g twice a day) on body composition, as primary outcome, measured by Dual Energy X-Ray Absorptiometry (DXA), and metabolic parameters, as secondary outcomes, like amino acid profiles and satiating capacity, in obese postmenopausal women following a tailored hypocaloric diet (25–30% less than daily energy requirements). Twenty-seven women were randomly assigned to the supplemented group (14) or placebo group (13). There was a significant interaction between time and group for body mass index (BMI) (p < 0.0001), waist (p = 0.002) and hip circumferences (p = 0.01), total protein (0.008), albumin (0.005), Homeostasis Model Assessment index score (p = 0.04), glycine (p = 0.002), glutamine (p = 0.004), and histidine (p = 0.007). Haber’s means over time showed a clearly greater feeling of satiety for the supplemented compared to the placebo group. These findings indicate that RG supplementation in addition to a tailored diet counterbalanced the metabolic changes typical of menopause, with improvements in BMI, body composition, insulin resistance, amino acid profiles, and satiety.
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Affiliation(s)
- Mariangela Rondanelli
- IRCCS Mondino Foundation, 27100 Pavia, Italy;
- Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
| | - Gabriella Peroni
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona ‘‘Istituto Santa Margherita’’, University of Pavia, 27100 Pavia, Italy; (M.N.); (M.A.F.); (A.T.); (C.G.)
- Correspondence: ; Tel.: +39-0382381739
| | - Attilio Giacosa
- Department of Gastroenterology and Clinical Nutrition, Policlinico di Monza, via Amati 111, 20900 Monza, Italy;
| | - Teresa Fazia
- Department of Brain and Behavioral Science, University of Pavia, 27100 Pavia, Italy; (T.F.); (L.B.)
| | - Luisa Bernardinelli
- Department of Brain and Behavioral Science, University of Pavia, 27100 Pavia, Italy; (T.F.); (L.B.)
| | - Maurizio Naso
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona ‘‘Istituto Santa Margherita’’, University of Pavia, 27100 Pavia, Italy; (M.N.); (M.A.F.); (A.T.); (C.G.)
| | - Milena Anna Faliva
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona ‘‘Istituto Santa Margherita’’, University of Pavia, 27100 Pavia, Italy; (M.N.); (M.A.F.); (A.T.); (C.G.)
| | - Alice Tartara
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona ‘‘Istituto Santa Margherita’’, University of Pavia, 27100 Pavia, Italy; (M.N.); (M.A.F.); (A.T.); (C.G.)
| | - Clara Gasparri
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona ‘‘Istituto Santa Margherita’’, University of Pavia, 27100 Pavia, Italy; (M.N.); (M.A.F.); (A.T.); (C.G.)
| | - Simone Perna
- Department of Biology, College of Science, University of Bahrain, Sakhir Campus, Sakhir 32038, Bahrain;
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9
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Kim JA, Hwang SY, Yu JH, Roh E, Hong SH, Lee YB, Kim NH, Yoo HJ, Seo JA, Kim NH, Kim SG, Baik SH, Choi KM. Association of the triglyceride and glucose index with low muscle mass: KNHANES 2008-2011. Sci Rep 2021; 11:450. [PMID: 33432036 PMCID: PMC7801612 DOI: 10.1038/s41598-020-80305-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 12/18/2020] [Indexed: 12/13/2022] Open
Abstract
The triglyceride-glucose (TyG) index is a simple surrogate marker of insulin resistance. We evaluated the association of the TyG index with low muscle mass using a nationwide population-based representative data. This is a cross-sectional study that included 9477 participants aged ≥ 40 years from the Korea National Health and Nutrition Examination Survey between 2008 and 2011. The TyG index was calculated as ln[triglyceride (mg/dL) × fasting plasma glucose (mg/dL)/2]. Dual-energy X-ray absorptiometry was used to measure appendicular lean mass (ALM). Low muscle mass was defined an ALM/weight of 2 standard deviations (SD) below of young participants. The overall prevalence of low muscle mass was 4.7%. The prevalence of low muscle mass increased linearly with the quartiles of the TyG index, 2.5%, 4.2%, 5.6%, and 6.7% in Q1–Q4, respectively. The TyG index was negatively associated with ALM/weight both in men (r = − 0.302) and women (r = − 0.230). The odds ratio (OR) for low muscle mass was 2.08 in the highest quartile compared to the lowest quartile. High TyG index was associated with an increased risk of low muscle mass (OR for 1SD increase: 1.13). Increased TyG index was associated with the risk of low muscle mass independent of confounding factors.
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Affiliation(s)
- Jung A Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Soon Young Hwang
- Department of Biostatistics, Korea University College of Medicine, Seoul, Republic of Korea
| | - Ji Hee Yu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Eun Roh
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - So-Hyeon Hong
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - You-Bin Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Nam Hoon Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Hye Jin Yoo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Ji A Seo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Nan Hee Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Sin Gon Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Sei Hyun Baik
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Kyung Mook Choi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Korea University, Seoul, Republic of Korea.
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10
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Morgan PT, Smeuninx B, Breen L. Exploring the Impact of Obesity on Skeletal Muscle Function in Older Age. Front Nutr 2020; 7:569904. [PMID: 33335909 PMCID: PMC7736105 DOI: 10.3389/fnut.2020.569904] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 11/06/2020] [Indexed: 12/16/2022] Open
Abstract
Sarcopenia is of important clinical relevance for loss of independence in older adults. The prevalence of obesity in combination with sarcopenia ("sarcopenic-obesity") is increasing at a rapid rate. However, whilst the development of sarcopenia is understood to be multi-factorial and harmful to health, the role of obesity from a protective and damaging perspective on skeletal muscle in aging, is poorly understood. Specifically, the presence of obesity in older age may be accompanied by a greater volume of skeletal muscle mass in weight-bearing muscles compared with lean older individuals, despite impaired physical function and resistance to anabolic stimuli. Collectively, these findings support a potential paradox in which obesity may protect skeletal muscle mass in older age. One explanation for these paradoxical findings may be that the anabolic response to weight-bearing activity could be greater in obese vs. lean older individuals due to a larger mechanical stimulus, compensating for the heightened muscle anabolic resistance. However, it is likely that there is a complex interplay between muscle, adipose, and external influences in the aging process that are ultimately harmful to health in the long-term. This narrative briefly explores some of the potential mechanisms regulating changes in skeletal muscle mass and function in aging combined with obesity and the interplay with sarcopenia, with a particular focus on muscle morphology and the regulation of muscle proteostasis. In addition, whilst highly complex, we attempt to provide an updated summary for the role of obesity from a protective and damaging perspective on muscle mass and function in older age. We conclude with a brief discussion on treatment of sarcopenia and obesity and a summary of future directions for this research field.
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Affiliation(s)
- Paul T. Morgan
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Benoit Smeuninx
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
- Cellular & Molecular Metabolism Laboratory, Monash Institute of Pharmacological Sciences, Monash University, Parkville, VIC, Australia
| | - Leigh Breen
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
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11
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Coussa A, Bassil M, Gougeon R, Marliss EB, Morais JA. Glucose and protein metabolic responses to an energy- but not protein- restricted diet in type 2 diabetes. Diabetes Obes Metab 2020; 22:1278-1285. [PMID: 32166852 DOI: 10.1111/dom.14026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 03/04/2020] [Accepted: 03/09/2020] [Indexed: 11/28/2022]
Abstract
AIMS To test the effect of energy restriction with maintained protein intake on body composition and on insulin sensitivity of glucose and protein metabolism in adults with type 2 diabetes (T2D). MATERIALS AND METHODS After 3 days of an isoenergetic diet with 1.2 g/kg/d protein, obese adults with T2D (three women, two men) followed a 5-week diet providing 60% of energy requirements with 45% carbohydrate, and with protein maintained at pre-intervention level. Isotopic tracers were used to quantify whole-body glucose (3-3 H-glucose) and protein (13 C-leucine) metabolism pre- (day 4) and post-intervention (day 39), in the postabsorptive state and during a hyperinsulinaemic, isoglycaemic, isoaminoacidaemic clamp. Body composition was measured using dual-energy x-ray absorptiometry. RESULTS After energy restriction, 6% weight loss occurred via total body (11%) and visceral fat losses (25%), but lean mass was preserved. Fasting glucose level, serum insulin level, homeostatic model assessment of insulin resistance index and C-peptide level decreased significantly (29%, 38%, 54% and 38%, respectively) as did other cardiometabolic risk factors. Between clamp studies, postabsorptive protein turnover and oxidation rates decreased (12% and 32%), resulting in less negative net balance, consistent with protein conservation. The rates of glucose turnover decreased, and glucose metabolic clearance rate improved (24%). During the clamp, protein flux was lower (9%) and breakdown suppressed (12%), and net balance became less negative but not different. Although glucose turnover did not differ, metabolic clearance improved by 47%. CONCLUSIONS In obese adults with T2D, an energy-restricted diet with maintained protein intake of ~1.2 g/kg/d improved the kinetics of protein metabolism (particularly in the postabsorptive state), and preserved lean body mass and increased glucose metabolic clearance rate.
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Affiliation(s)
- Ayla Coussa
- Crabtree Nutrition Laboratories, Research Institute and Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - Maya Bassil
- Crabtree Nutrition Laboratories, Research Institute and Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - Réjeanne Gougeon
- Crabtree Nutrition Laboratories, Research Institute and Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - Errol B Marliss
- Crabtree Nutrition Laboratories, Research Institute and Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - José A Morais
- Crabtree Nutrition Laboratories, Research Institute and Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada
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12
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Mantha OL, Huneau JF, Mathé V, Hermier D, Khodorova N, Mariotti F, Fouillet H. Differential changes to splanchnic and peripheral protein metabolism during the diet-induced development of metabolic syndrome in rats. Am J Physiol Endocrinol Metab 2020; 319:E175-E186. [PMID: 32459526 DOI: 10.1152/ajpendo.00061.2020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Little is known about the effects of the development of metabolic syndrome (MS) on protein and amino acid (AA) metabolism. During this study, we took advantage of the variability in interindividual susceptibility to high fat diet-induced MS to study the relationships between MS, protein synthesis, and AA catabolism in multiple tissues in rats. After 4 mo of high-fat feeding, an MS score (ZMS) was calculated as the average of the z-scores for individual MS components [weight, adiposities, homeostasis model for the assessment of insulin resistance (HOMA-IR), and triglycerides]. In the small intestine, liver, plasma, kidneys, heart, and muscles, tissue protein synthesis was measured by 2H2O labeling, and we evaluated the proportion of tissue AA catabolism (relative to protein synthesis) and nutrient routing to nonindispensable AAs in tissue proteins using natural nitrogen and carbon isotopic distances between tissue proteins and nutrients (Δ15N and Δ13C), respectively. In the liver, protein mass and synthesis increased, whereas the proportion of AA catabolism decreased with ZMS. By contrast, in muscles, we found no association between ZMS and protein mass, protein synthesis (except for a weak positive association in the gastrocnemius muscle only), and proportion of AA catabolism. The development of MS was also associated with altered metabolic flexibility and fatty acid oxidation, as shown by less routing of dietary lipids to nonindispensable AA synthesis in liver and muscle. In conclusion, MS development is associated with a greater gain of both fat and protein masses, with higher protein anabolism that mainly occurs in the liver, whereas muscles probably develop anabolic resistance due to insulin resistance.
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Affiliation(s)
- O L Mantha
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, 75005, Paris, France
| | - J-F Huneau
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, 75005, Paris, France
| | - V Mathé
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, 75005, Paris, France
| | - D Hermier
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, 75005, Paris, France
| | - N Khodorova
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, 75005, Paris, France
| | - F Mariotti
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, 75005, Paris, France
| | - H Fouillet
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, 75005, Paris, France
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13
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Han X, Møller LLV, De Groote E, Bojsen-Møller KN, Davey J, Henríquez-Olguin C, Li Z, Knudsen JR, Jensen TE, Madsbad S, Gregorevic P, Richter EA, Sylow L. Mechanisms involved in follistatin-induced hypertrophy and increased insulin action in skeletal muscle. J Cachexia Sarcopenia Muscle 2019; 10:1241-1257. [PMID: 31402604 PMCID: PMC7663972 DOI: 10.1002/jcsm.12474] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 05/07/2019] [Accepted: 06/12/2019] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Skeletal muscle wasting is often associated with insulin resistance. A major regulator of muscle mass is the transforming growth factor β (TGF-β) superfamily, including activin A, which causes atrophy. TGF-β superfamily ligands also negatively regulate insulin-sensitive proteins, but whether this pathway contributes to insulin action remains to be determined. METHODS To elucidate if TGF-β superfamily ligands regulate insulin action, we used an adeno-associated virus gene editing approach to overexpress an activin A inhibitor, follistatin (Fst288), in mouse muscle of lean and diet-induced obese mice. We determined basal and insulin-stimulated 2-deoxy-glucose uptake using isotopic tracers in vivo. Furthermore, to evaluate whether circulating Fst and activin A concentrations are associated with obesity, insulin resistance, and weight loss in humans, we analysed serum from morbidly obese subjects before, 1 week, and 1 year after Roux-en-Y gastric bypass (RYGB). RESULTS Fst288 muscle overexpression markedly increased in vivo insulin-stimulated (but not basal) glucose uptake (+75%, P < 0.05) and increased protein expression and intracellular insulin signalling of AKT, TBC1D4, PAK1, pyruvate dehydrogenase-E1α, and p70S6K, while decreasing TBC1D1 signaling (P < 0.05). Fst288 increased both basal and insulin-stimulated protein synthesis, but no correlation was observed between the Fst288-driven hypertrophy and the increase in insulin-stimulated glucose uptake. Importantly, Fst288 completely normalized muscle glucose uptake in insulin-resistant diet-induced obese mice. RYGB surgery doubled circulating Fst and reduced activin A (-24%, P < 0.05) concentration 1 week after surgery before any significant weight loss in morbidly obese normoglycemic patients, while major weight loss after 1 year did not further change the concentrations. CONCLUSIONS We here present evidence that Fst is a potent regulator of insulin action in muscle, and in addition to AKT and p70S6K, we identify TBC1D1, TBC1D4, pyruvate dehydrogenase-E1α, and PAK1 as Fst targets. Circulating Fst more than doubled post-RYGB surgery, a treatment that markedly improved insulin sensitivity, suggesting a role for Fst in regulating glycaemic control. These findings demonstrate the therapeutic potential of inhibiting TGF-β superfamily ligands to improve insulin action and Fst's relevance to muscle wasting-associated insulin-resistant conditions in mice and humans.
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Affiliation(s)
- Xiuqing Han
- Section of Molecular Physiology, Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Lisbeth Liliendal Valbjørn Møller
- Section of Molecular Physiology, Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Estelle De Groote
- Faculty of Motor Science, Institute of Neuroscience, Université Catholique de Louvain, Ottignies-Louvain-la-Neuve, Belgium
| | | | - Jonathan Davey
- Center for Muscle Research, Department of Physiology, University of Melbourne, Melbourne, Australia
| | - Carlos Henríquez-Olguin
- Section of Molecular Physiology, Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Zhencheng Li
- Section of Molecular Physiology, Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Jonas Roland Knudsen
- Section of Molecular Physiology, Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Elbenhardt Jensen
- Section of Molecular Physiology, Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Sten Madsbad
- Department of Endocrinology, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Paul Gregorevic
- Center for Muscle Research, Department of Physiology, University of Melbourne, Melbourne, Australia
| | - Erik Arne Richter
- Section of Molecular Physiology, Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Lykke Sylow
- Section of Molecular Physiology, Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
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14
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Dev R, Bruera E, Dalal S. Insulin resistance and body composition in cancer patients. Ann Oncol 2019; 29 Suppl 2:ii18-ii26. [PMID: 29506229 DOI: 10.1093/annonc/mdx815] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cancer cachexia, weight loss with altered body composition, is a multifactorial syndrome propagated by symptoms that impair caloric intake, tumor byproducts, chronic inflammation, altered metabolism, and hormonal abnormalities. Cachexia is associated with reduced performance status, decreased tolerance to chemotherapy, and increased mortality in cancer patients. Insulin resistance as a consequence of tumor byproducts, chronic inflammation, and endocrine dysfunction has been associated with weight loss in cancer patients. Insulin resistance in cancer patients is characterized by increased hepatic glucose production and gluconeogenesis, and unlike type 2 diabetes, normal fasting glucose with high, normal or low levels of insulin. Cancer cachexia results in altered body composition with the loss of lean muscle mass with or without the loss of adipose tissue. Alteration in visceral adiposity, accumulation of intramuscular adipose tissue, and secretion of adipocytokines from adipose cells may play a role in promoting the metabolic derangements associated with cachexia including a proinflammatory environment and insulin resistance. Increased production of ghrelin, testosterone deficiency, and low vitamin D levels may also contribute to altered metabolism of glucose. Cancer cachexia cannot be easily reversed by standard nutritional interventions and identifying and treating cachexia at the earliest stage of development is advocated. Experts advocate for multimodal therapy to address symptoms that impact caloric intake, reduce chronic inflammation, and treat metabolic and endocrine derangements, which propagate the loss of weight. Treatment of insulin resistance may be a critical component of multimodal therapy for cancer cachexia and more research is needed.
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Affiliation(s)
- R Dev
- Department of Symptom Control & Palliative Medicine, University of Texas MD Anderson Cancer Center, Houston, USA
| | - E Bruera
- Department of Symptom Control & Palliative Medicine, University of Texas MD Anderson Cancer Center, Houston, USA
| | - S Dalal
- Department of Symptom Control & Palliative Medicine, University of Texas MD Anderson Cancer Center, Houston, USA
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15
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Meex RCR, Blaak EE, van Loon LJC. Lipotoxicity plays a key role in the development of both insulin resistance and muscle atrophy in patients with type 2 diabetes. Obes Rev 2019; 20:1205-1217. [PMID: 31240819 PMCID: PMC6852205 DOI: 10.1111/obr.12862] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 12/12/2022]
Abstract
Insulin resistance and muscle mass loss often coincide in individuals with type 2 diabetes. Most patients with type 2 diabetes are overweight, and it is well established that obesity and derangements in lipid metabolism play an important role in the development of insulin resistance in these individuals. Specifically, increased adipose tissue mass and dysfunctional adipose tissue lead to systemic lipid overflow and to low-grade inflammation via altered secretion of adipokines and cytokines. Furthermore, an increased flux of fatty acids from the adipose tissue may contribute to increased fat storage in the liver and in skeletal muscle, resulting in an altered secretion of hepatokines, mitochondrial dysfunction, and impaired insulin signalling in skeletal muscle. Recent studies suggest that obesity and lipid derangements in adipose tissue can also lead to the development of muscle atrophy, which would make insulin resistance and muscle atrophy two sides of the same coin. Unfortunately, the exact relationship between lipid accumulation, type 2 diabetes, and muscle atrophy remains largely unexplored. The aim of this review is to discuss the relationship between type 2 diabetes and muscle loss and to discuss some of the joint pathways through which lipid accumulation in organs may affect peripheral insulin sensitivity and muscle mass.
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Affiliation(s)
- Ruth C R Meex
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Ellen E Blaak
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Luc J C van Loon
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
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16
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Kouw IWK, van Dijk JW, Horstman AMH, Kramer IF, Goessens JPB, van Dielen FMH, Verdijk LB, van Loon LJC. Basal and Postprandial Myofibrillar Protein Synthesis Rates Do Not Differ between Lean and Obese Middle-Aged Men. J Nutr 2019; 149:1533-1542. [PMID: 31174213 PMCID: PMC6736155 DOI: 10.1093/jn/nxz104] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/28/2019] [Accepted: 04/25/2019] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Excess lipid availability has been associated with the development of anabolic resistance. As such, obesity may be accompanied by impairments in muscle protein metabolism. OBJECTIVE We hypothesized that basal and postprandial muscle protein synthesis rates are lower in obese than in lean men. METHODS Twelve obese men [mean ± SEM age: 48 ± 2 y; BMI (in kg/m2): 37.0 ± 1.5; body fat: 32 ± 2%] and 12 age-matched lean controls (age: 43 ± 3 y; BMI: 23.4 ± 0.4; body fat: 21 ± 1%) received primed continuous L-[ring-2H5]-phenylalanine and L-[ring-3,5-2H2]-tyrosine infusions and ingested 25 g intrinsically L-[1-13C]-phenylalanine labeled whey protein. Repeated blood and muscle samples were obtained to assess protein digestion and amino acid absorption kinetics, and basal and postprandial myofibrillar protein synthesis rates. RESULTS Exogenous phenylalanine appearance rates increased after protein ingestion in both groups (P < 0.001), with a total of 53 ± 1% and 53 ± 2% of dietary protein-derived phenylalanine appearing in the circulation over the 5-h postprandial period in lean and obese men, respectively (P = 0.82). After protein ingestion, whole-body protein synthesis and oxidation rates increased to a greater extent in lean men than in the obese (P-interaction < 0.05), resulting in a higher whole-body protein net balance in the lean than in the obese (7.1 ± 0.2 and 4.6 ± 0.4 µmol phenylalanine · h-1 · kg-1, respectively; P-interaction < 0.001). Myofibrillar protein synthesis rates increased from 0.030 ± 0.002 and 0.028 ± 0.003%/h in the postabsorptive period to 0.034 ± 0.002 and 0.035 ± 0.003%.h-1 in the 5-h postprandial period (P = 0.03) in lean and obese men, respectively, with no differences between groups (P-interaction = 0.58). CONCLUSIONS Basal, postabsorptive myofibrillar protein synthesis rates do not differ between lean and obese middle-aged men. Postprandial protein handling, including protein digestion and amino acid absorption, and the postprandial muscle protein synthetic response after the ingestion of 25 g whey protein are not impaired in obese men. This trial was registered at www.trialregister.nl as NTR4060.
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Affiliation(s)
- Imre W K Kouw
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands,Top Institute Food and Nutrition, Wageningen, Netherlands
| | - Jan Willem van Dijk
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands,Top Institute Food and Nutrition, Wageningen, Netherlands
| | - Astrid M H Horstman
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands,Top Institute Food and Nutrition, Wageningen, Netherlands
| | - Irene Fleur Kramer
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands,Top Institute Food and Nutrition, Wageningen, Netherlands
| | - Joy P B Goessens
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands
| | | | - Lex B Verdijk
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands,Top Institute Food and Nutrition, Wageningen, Netherlands
| | - Luc J C van Loon
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands,Top Institute Food and Nutrition, Wageningen, Netherlands,Address correspondence to LJCvL (e-mail: )
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17
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De Luca A, Bernardo K, Frasquet-Darrieux M, Christin P, Schiphorst AM, Grand M, Ingrand P, Robins RJ, Hankard R. Maternal obesity does not influence human milk protein 15N natural isotope abundance. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES 2019; 55:385-393. [PMID: 31132878 DOI: 10.1080/10256016.2019.1620229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 05/01/2019] [Indexed: 06/09/2023]
Abstract
Obesity increases protein metabolism with a potential effect on nitrogen isotope fractionation. The aim of this study was to test the influence of obesity on human milk extracted protein 15N natural isotope abundance (NIA) at one month post-partum and to compare human milk extracted protein 15N NIA and bulk infant hair 15N NIA. This cross-sectional observational study involved 16 obese mothers (body mass index (BMI) ≥ 30 kg m-2 before pregnancy) matched with 16 normal-weight mothers (18.5 kg m-2 ≤ BMI < 25 kg m-2) for age and pregnancy characteristics. Human milk extracted protein and bulk infant hair 15N NIA were determined by isotope ratio monitoring by mass spectrometry interfaced to an elemental analyser (IRM-EA/MS). No significant difference was found in human milk protein 15N NIA values between obese and normal-weight mothers (8.93 ± 0.48 ‰ vs. 8.95 ± 0.27 ‰). However, human milk protein 15N NIA was significantly lower than bulk infant hair 15N NIA: 8.94 ± 0.38 ‰ vs. 9.66 ± 0.69 ‰, respectively. On the basis of these results, it is concluded that human milk protein 15N NIA measured at one month post-partum is not influenced by maternal obesity. These findings suggest that 15N NIA may be exploited to study metabolism without considering maternal obesity as a confounder.
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Affiliation(s)
- Arnaud De Luca
- a Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1069 , Tours , France
- b Nutrition Unit, University Hospital of Tours , Tours , France
| | - Karine Bernardo
- a Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1069 , Tours , France
- b Nutrition Unit, University Hospital of Tours , Tours , France
| | | | - Patricia Christin
- c Pediatrics and Child Nutrition, University Hospital , Poitiers , France
- d Maternity Ward, General Hospital , Chatellerault , France
| | - Anne-Marie Schiphorst
- e Elucidation of Biosynthesis by Isotopic Spectrometry Group, CEISAM, CNRS-University of Nantes, UMR 6230 , Nantes , France
| | - Mathilde Grand
- e Elucidation of Biosynthesis by Isotopic Spectrometry Group, CEISAM, CNRS-University of Nantes, UMR 6230 , Nantes , France
| | - Pierre Ingrand
- f Institut National de la Santé Et de la Recherche Médicale (INSERM) CIC 1402 , Poitiers , France
- g Institute of Public Health, Poitiers University , Poitiers , France
| | - Richard J Robins
- e Elucidation of Biosynthesis by Isotopic Spectrometry Group, CEISAM, CNRS-University of Nantes, UMR 6230 , Nantes , France
| | - Regis Hankard
- a Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1069 , Tours , France
- b Nutrition Unit, University Hospital of Tours , Tours , France
- h Faculty of Medicine, F Rabelais University , Tours , France
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18
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Daurio NA, Wang Y, Chen Y, Zhou H, Carballo-Jane E, Mane J, Rodriguez CG, Zafian P, Houghton A, Addona G, McLaren DG, Zhang R, Shyong BJ, Bateman K, Downes DP, Webb M, Kelley DE, Previs SF. Spatial and temporal studies of metabolic activity: contrasting biochemical kinetics in tissues and pathways during fasted and fed states. Am J Physiol Endocrinol Metab 2019; 316:E1105-E1117. [PMID: 30912961 DOI: 10.1152/ajpendo.00459.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The regulation of nutrient homeostasis, i.e., the ability to transition between fasted and fed states, is fundamental in maintaining health. Since food is typically consumed over limited (anabolic) periods, dietary components must be processed and stored to counterbalance the catabolic stress that occurs between meals. Herein, we contrast tissue- and pathway-specific metabolic activity in fasted and fed states. We demonstrate that knowledge of biochemical kinetics that is obtained from opposite ends of the energetic spectrum can allow mechanism-based differentiation of healthy and disease phenotypes. Rat models of type 1 and type 2 diabetes serve as case studies for probing spatial and temporal patterns of metabolic activity via [2H]water labeling. Experimental designs that capture integrative whole body metabolism, including meal-induced substrate partitioning, can support an array of research surrounding metabolic disease; the relative simplicity of the approach that is discussed here should enable routine applications in preclinical models.
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Affiliation(s)
- Natalie A Daurio
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Yichen Wang
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Ying Chen
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Haihong Zhou
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Ester Carballo-Jane
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Joel Mane
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Carlos G Rodriguez
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Peter Zafian
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Andrea Houghton
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - George Addona
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - David G McLaren
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Rena Zhang
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Bao Jen Shyong
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Kevin Bateman
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Daniel P Downes
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Maria Webb
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - David E Kelley
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
| | - Stephen F Previs
- Merck Research Laboratories, Merck & Company, Incorporated, Kenilworth, New Jersey
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19
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Gadéa E, Thivat E, Dubray-Longeras P, Arbre M, Van-Praagh I, Mouret-Reynier MA, Herviou P, Dohou J, Ginzac A, Duclos M, Morio B, Durando X. Prospective Study on Body Composition, Energy Balance and Biological Factors Changes in Post-menopausal Women with Breast Cancer Receiving Adjuvant Chemotherapy Including Taxanes. Nutr Cancer 2018; 70:997-1006. [PMID: 30235012 DOI: 10.1080/01635581.2018.1502330] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In breast cancer patients, weight and fat mass changes observed after chemotherapy have been related to poor prognosis but some recent works using modern chemotherapy failed to find this correlation with weight gain. In this study, the extent of changes in weight and body composition (DEXA, impedance) was characterized until six months after current chemotherapy, in 50 post-menopausal women with breast cancer. The evolution of factors contributing to the energy balance and some biological factors were also described. During chemotherapy, 20% of women lost weight due to both fat (-13.1% ± 10.3) and lean soft tissue mass loss (-3.6% ± 4.6). Twenty percent of women gained weight. No significant fat mass gain was observed in these women but significant water gain was highlighted. Six months later, women who gained weight presented a gain in fat mass (15.4% ± 19.0), especially in the abdominal region. Age and initial BMI were negatively correlated with fat mass in multivariate analyzes (r = 0.486, P = 0.0030). No significant variation of the glucose homeostasis, triglycerides, and HDL-Cholesterol was found six months after chemotherapy. These results do not suggest major adverse metabolic disturbances six months after modern chemotherapy and only a mild fat mass gain was observed in women who gained weight.
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Affiliation(s)
- Emilie Gadéa
- a Clinical Research Unit , CH Emile Roux , Le Puy-en-Velay , France.,b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France
| | - Emilie Thivat
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France.,c Centre d'Investigation Clinique , Clermont - Ferrand , France
| | - Pascale Dubray-Longeras
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France.,c Centre d'Investigation Clinique , Clermont - Ferrand , France
| | - Marie Arbre
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France
| | - Isabelle Van-Praagh
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France.,c Centre d'Investigation Clinique , Clermont - Ferrand , France
| | - Marie-Ange Mouret-Reynier
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France.,c Centre d'Investigation Clinique , Clermont - Ferrand , France
| | - Pauline Herviou
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France.,d Department of Pharmacology , CHU Clermont-Ferrand , Clermont-Ferrand , France
| | - Joyce Dohou
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France.,e Universite d'Auvergne , Clermont-Ferrand , France
| | - Angeline Ginzac
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France.,e Universite d'Auvergne , Clermont-Ferrand , France
| | - Martine Duclos
- f Department of Sport Medicine and Functional Explorations , CHU Clermont-Ferrand , Clermont-Ferrand , France.,g Human Nutrition Unit, INRA , Clermont-Ferrand , France
| | - Béatrice Morio
- e Universite d'Auvergne , Clermont-Ferrand , France.,g Human Nutrition Unit, INRA , Clermont-Ferrand , France
| | - Xavier Durando
- b Clinical Research Unit, Centre Jean Perrin , Clermont-Ferrand , France.,c Centre d'Investigation Clinique , Clermont - Ferrand , France
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20
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Early changes in tissue amino acid metabolism and nutrient routing in rats fed a high-fat diet: evidence from natural isotope abundances of nitrogen and carbon in tissue proteins. Br J Nutr 2018; 119:981-991. [PMID: 29502540 DOI: 10.1017/s0007114518000326] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Little is known about how diet-induced obesity and insulin resistance affect protein and amino acid (AA) metabolism in tissues. The natural relative abundances of the heavy stable isotopes of C (δ 13C) and N (δ 15N) in tissue proteins offer novel and promising biomarkers of AA metabolism. They, respectively, reflect the use of dietary macronutrients for tissue AA synthesis and the relative metabolic use of tissue AA for oxidation v. protein synthesis. In this study, δ 13C and δ 15N were measured in the proteins of various tissues in young adult rats exposed perinatally and/or fed after weaning with a normal- or a high-fat (HF) diet, the aim being to characterise HF-induced tissue-specific changes in AA metabolism. HF feeding was shown to increase the routing of dietary fat to all tissue proteins via non-indispensable AA synthesis, but did not affect AA allocation between catabolic and anabolic processes in most tissues. However, the proportion of AA directed towards oxidation rather than protein synthesis was increased in the small intestine and decreased in the tibialis anterior muscle and adipose tissue. In adipose tissue, the AA reallocation was observed in the case of perinatal or post-weaning exposure to HF, whereas in the small intestine and tibialis anterior muscle the AA reallocation was only observed after HF exposure that covered both the perinatal and post-weaning periods. In conclusion, HF exposure induced an early reorganisation of AA metabolism involving tissue-specific effects, and in particular a decrease in the relative allocation of AA to oxidation in several peripheral tissues.
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21
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Gar C, Rottenkolber M, Prehn C, Adamski J, Seissler J, Lechner A. Serum and plasma amino acids as markers of prediabetes, insulin resistance, and incident diabetes. Crit Rev Clin Lab Sci 2017; 55:21-32. [PMID: 29239245 DOI: 10.1080/10408363.2017.1414143] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Presently, routine screening misses many cases of prediabetes and early type 2 diabetes (T2D). Therefore, better biomarkers are needed for a simple and early detection of abnormalities of glucose metabolism and prediction of future T2D. Possible candidates for this include plasma or serum amino acids because glucose and amino acid metabolism are closely connected. This review presents the available evidence of this connectivity and discusses its clinical implications. First, we examine the underlying physiological, pre-analytical, and analytical issues. Then, we summarize results of human studies that evaluate amino acid levels as markers for insulin resistance, prediabetes, and future incident T2D. Finally, we illustrate the interconnection of amino acid levels and metabolic syndrome with our own data from a deeply phenotyped human cohort. We also discuss how amino acids may contribute to the pathophysiology of T2D. We conclude that elevated branched-chain amino acids and reduced glycine are currently the most robust and consistent amino acid markers for prediabetes, insulin resistance, and future T2D. Yet, we are cautious regarding the clinical potential even of these parameters because their discriminatory power is insufficient and their levels depend not only on glycemia, but also on other components of the metabolic syndrome. The identification of more precise intermediates of amino acid metabolism or combinations with other biomarkers will, therefore, be necessary to obtain in order to develop laboratory tests that can improve T2D screening.
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Affiliation(s)
- C Gar
- a Diabetes Research Group , Medizinische Klinik und Poliklinik IV, Klinikum der Universität München , Munich , Germany.,b Clinical Cooperation Group Type 2 Diabetes , Helmholtz Zentrum München , Neuherberg , Germany.,c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany
| | - M Rottenkolber
- a Diabetes Research Group , Medizinische Klinik und Poliklinik IV, Klinikum der Universität München , Munich , Germany.,b Clinical Cooperation Group Type 2 Diabetes , Helmholtz Zentrum München , Neuherberg , Germany.,c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany
| | - C Prehn
- d Institute of Experimental Genetics, Genome Analysis Center , Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany
| | - J Adamski
- c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany.,d Institute of Experimental Genetics, Genome Analysis Center , Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany.,e Lehrstuhl fu¨r Experimentelle Genetik , Technische Universität München , Freising , Germany
| | - J Seissler
- a Diabetes Research Group , Medizinische Klinik und Poliklinik IV, Klinikum der Universität München , Munich , Germany.,b Clinical Cooperation Group Type 2 Diabetes , Helmholtz Zentrum München , Neuherberg , Germany.,c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany
| | - A Lechner
- a Diabetes Research Group , Medizinische Klinik und Poliklinik IV, Klinikum der Universität München , Munich , Germany.,b Clinical Cooperation Group Type 2 Diabetes , Helmholtz Zentrum München , Neuherberg , Germany.,c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany
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22
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Okekunle AP, Li Y, Liu L, Du S, Wu X, Chen Y, Li Y, Qi J, Sun C, Feng R. Abnormal circulating amino acid profiles in multiple metabolic disorders. Diabetes Res Clin Pract 2017; 132:45-58. [PMID: 28783532 DOI: 10.1016/j.diabres.2017.07.023] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 06/02/2017] [Accepted: 07/13/2017] [Indexed: 01/15/2023]
Abstract
AIM To evaluate circulating amino acids (AA) profiles in obesity, type 2 diabetes (T2D) and metabolic syndrome (MetS). METHODS Serum AA were profiled among 200; healthy, obese, T2D and MetS subjects matched by sex, age and BMI using ultra-high performance liquid chromatography tandem quadruple mass spectrometry (UPLC-TQ-MS). A meta-analysis, including 47 case-control studies (including the current study) on serum AA in obesity, T2D and MetS searched through October 2016 was conducted to explore the AA differences in obesity, T2D and MetS. RESULTS In comparison with healthy controls, 14 AA (10 increased and 4 decreased) were significantly altered (P<0.05) in all non-healthy subjects. Also, mean differences of valine (obese: 34.13 [27.70, 40.56]µmol/L, P<0.001, T2D: 19.49 [3.31, 35.68]µmol/L, P<0.05, MetS: 29.18 [16.04, 42.33]µmol/L, P<0.001), glutamic acid (obese: 18.62 [11.64, 25.61]µmol/L, P<0.001, T2D: 19.94 [0.28, 39.61]µmol/L, P<0.05, MetS: 12.45 [3.98, 20.91]µmol/L, P<0.001), proline (obese: 16.72 [6.20, 27.24]µmol/L, P<0.001, T2D: 20.72 [15.82, 25.61]µmol/L, P<0.001, MetS: 29.95 [25.18, 34.71]µmol/L, P<0.001) and isoleucine (obese: 11.39 [8.54, 14.24]µmol/L, P<0.001, T2D: 7.37 [1.52, 13.22]µmol/L, P<0.05, MetS: 10.40 [4.90, 15.89]µmol/L, P<0.001) were significantly higher compared to healthy controls. Similarly, mean differences of glycine (obese: -30.99 [-39.69, -22.29]µmol/L, P<0.001, T2D: -30.37 [-41.80, -18.94]µmol/L, P<0.001 and MetS: -35.24 [-39.28, -31.21]µmol/L, P<0.001) were significantly lower compared to healthy controls. CONCLUSION In both the case-control study and meta-analysis, obesity was related to the most circulating AA changes, followed by MetS and T2D. Valine, isoleucine, glutamic acid and proline increased, while Glycine decreased in all metabolic disorders.
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Affiliation(s)
- Akinkunmi Paul Okekunle
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China
| | - Ying Li
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China
| | - Liyan Liu
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China
| | - Shanshan Du
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China
| | - Xiaoyan Wu
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China
| | - Yang Chen
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China
| | - Yanchuan Li
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China
| | - Jiayue Qi
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China
| | - Changhao Sun
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China.
| | - Rennan Feng
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang Province 150081, People's Republic of China.
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23
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Smeuninx B, Mckendry J, Wilson D, Martin U, Breen L. Age-Related Anabolic Resistance of Myofibrillar Protein Synthesis Is Exacerbated in Obese Inactive Individuals. J Clin Endocrinol Metab 2017; 102:3535-3545. [PMID: 28911148 PMCID: PMC5587073 DOI: 10.1210/jc.2017-00869] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 07/11/2017] [Indexed: 12/27/2022]
Abstract
CONTEXT A diminished muscle anabolic response to protein nutrition may underpin age-associated muscle loss. OBJECTIVE To determine how chronological and biological aging influence myofibrillar protein synthesis (MyoPS). DESIGN Cross-sectional comparison. SETTING Clinical research facility. PARTICIPANTS Ten older lean [OL: 71.7 ± 6 years; body mass index (BMI) ≤25 kg ⋅ m-2], 7 older obese (OO: 69.1 ± 2 years; BMI ≥30 kg ⋅ m-2), and 18 young lean (YL) individuals (25.5 ± 4 years; BMI ≤25 kg ⋅ m-2). INTERVENTION Skeletal muscle biopsies obtained during a primed-continuous infusion of l-[ring-13C6]-phenylalanine. MAIN OUTCOME MEASURES Anthropometrics, insulin resistance, inflammatory markers, habitual diet, physical activity, MyoPS rates, and fiber-type characteristics. RESULTS Fat mass, insulin resistance, inflammation, and type II fiber intramyocellular lipid were greater, and daily step count lower, in OO compared with YL and OL. Postprandial MyoPS rates rose above postabsorptive values by ∼81% in YL (P < 0.001), ∼38% in OL (P = 0.002, not different from YL), and ∼9% in OO (P = 0.11). Delta change in postprandial MyoPS from postabsorptive values was greater in YL compared with OL (P = 0.032) and OO (P < 0.001). Absolute postprandial MyoPS rates and delta postprandial MyoPS change were associated with step count (r2 = 0.33; P = 0.015) and leg fat mass (r2 = 0.4; P = 0.006), respectively, in older individuals. Paradoxically, lean mass was similar between groups, and muscle fiber area was greater in OO vs OL (P = 0.002). CONCLUSION Age-related muscle anabolic resistance is exacerbated in obese inactive individuals, with no apparent detriment to muscle mass.
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Affiliation(s)
- Benoit Smeuninx
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
- MRC Arthritis Research UK Centre for Musculoskeletal Ageing Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - James Mckendry
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
- MRC Arthritis Research UK Centre for Musculoskeletal Ageing Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Daisy Wilson
- MRC Arthritis Research UK Centre for Musculoskeletal Ageing Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
- Queen Elizabeth Hospital Birmingham, University Hospitals Birmingham NHS Foundation Trust, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Una Martin
- Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Leigh Breen
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
- MRC Arthritis Research UK Centre for Musculoskeletal Ageing Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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24
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Labonte CC, Farsijani S, Marliss EB, Gougeon R, Morais JA, Pereira S, Bassil M, Winter A, Murphy J, Combs TP, Chevalier S. Plasma Amino Acids vs Conventional Predictors of Insulin Resistance Measured by the Hyperinsulinemic Clamp. J Endocr Soc 2017; 1:861-873. [PMID: 29264537 PMCID: PMC5686697 DOI: 10.1210/js.2016-1108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 04/21/2017] [Indexed: 12/27/2022] Open
Abstract
Context: Specific plasma amino acid (AA) profiles including elevated postabsorptive branched-chain amino acids (BCAAs) have been associated with insulin resistance (IR), mostly estimated by homeostatic model assessment. This study assessed the associations of postabsorptive AAs with IR directly measured by insulin-mediated glucose disposal and determined the quantitative value of AAs and conventional IR predictors. Design: Fifty-one healthy, 31 overweight or obese (Ow/Ob), and 52 men and women with type 2 diabetes (T2D) were studied retrospectively. The main outcome measures were the glucose disposal (M/I) index (using 3-[3H]-glucose) during a hyperinsulinemic–euglycemic clamp and whole-body protein turnover (using 1-[13C]-leucine). Results: Compared with healthy participants, M/I was lower in Ow/Ob participants and lowest in those with T2D. BCAAs, glutamate, and lysine were higher in the Ow/Ob and T2D groups than in healthy participants; glycine and threonine were lower. Most AAs were higher in men. Principal component analysis identified component 1 (C1: BCAAs, methionine) and C3 (glycine, threonine, serine). Glutamate, C1, ornithine, lysine, methionine, and tyrosine correlated negatively with M/I; C3 and glycine correlated positively. Waist circumference and sex strongly influenced AA–IR relationships; only glutamate correlated after these factors were controlled for. From regression analysis, waist circumference, fasting glucose, insulin, and free fatty acids (FFAs) negatively predicted 64% of the M/I variance; glutamate added 2% more. In nondiabetic participants, IR was predicted by waist circumference, insulin, and FFAs, without contribution from AAs. Conclusion: Several postabsorptive AAs correlated with IR but added limited predictive value to conventional markers because levels were determined largely by abdominal adiposity. Data suggest a sex-specific regulation of AA metabolism by excess adiposity, particularly the BCAAs, warranting investigation.
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Affiliation(s)
- Cherise C Labonte
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Samaneh Farsijani
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada.,Research Institute of the McGill University Health Centre, Montreal, Quebec H3A 0G4, Canada
| | - Errol B Marliss
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada.,Research Institute of the McGill University Health Centre, Montreal, Quebec H3A 0G4, Canada.,Department of Medicine, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Réjeanne Gougeon
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada.,Research Institute of the McGill University Health Centre, Montreal, Quebec H3A 0G4, Canada.,Department of Medicine, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - José A Morais
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada.,Research Institute of the McGill University Health Centre, Montreal, Quebec H3A 0G4, Canada.,Department of Medicine, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Sandra Pereira
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Maya Bassil
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Aaron Winter
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Jessica Murphy
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Terry P Combs
- Research Institute of the McGill University Health Centre, Montreal, Quebec H3A 0G4, Canada.,Department of Medicine, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Stéphanie Chevalier
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec H3A 0G4, Canada.,Research Institute of the McGill University Health Centre, Montreal, Quebec H3A 0G4, Canada.,Department of Medicine, McGill University, Montreal, Quebec H3A 0G4, Canada
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25
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Campbell LE, Langlais PR, Day SE, Coletta RL, Benjamin TR, De Filippis EA, Madura JA, Mandarino LJ, Roust LR, Coletta DK. Identification of Novel Changes in Human Skeletal Muscle Proteome After Roux-en-Y Gastric Bypass Surgery. Diabetes 2016; 65:2724-31. [PMID: 27207528 PMCID: PMC5001187 DOI: 10.2337/db16-0004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Accepted: 04/29/2016] [Indexed: 12/18/2022]
Abstract
The mechanisms of metabolic improvements after Roux-en-Y gastric bypass (RYGB) surgery are not entirely clear. Therefore, the aim of our study was to investigate the role of obesity and RYGB on the human skeletal muscle proteome. Basal muscle biopsies were obtained from seven obese (BMI >40 kg/m(2)) female subjects (45.1 ± 3.6 years) pre- and 3 months post-RYGB, and euglycemic-hyperinsulinemic clamps were used to assess insulin sensitivity. Four age-matched (48.5 ± 4.7 years) lean (BMI <25 kg/m(2)) females served as control subjects. We performed quantitative mass spectrometry and microarray analyses on protein and RNA isolated from the muscle biopsies. Significant improvements in fasting plasma glucose (104.2 ± 7.8 vs. 86.7 ± 3.1 mg/dL) and BMI (42.1 ± 2.2 vs. 35.3 ± 1.8 kg/m(2)) were demonstrated in the pre- versus post-RYGB, both P < 0.05. Proteomic analysis identified 2,877 quantifiable proteins. Of these, 395 proteins were significantly altered in obesity before surgery, and 280 proteins differed significantly post-RYGB. Post-RYGB, 49 proteins were returned to normal levels after surgery. KEGG pathway analysis revealed a decreased abundance in ribosomal and oxidative phosphorylation proteins in obesity, and a normalization of ribosomal proteins post-RYGB. The transcriptomic data confirmed the normalization of the ribosomal proteins. Our results provide evidence that obesity and RYGB have a dynamic effect on the skeletal muscle proteome.
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Affiliation(s)
| | | | - Samantha E Day
- School of Life Sciences, Arizona State University, Tempe, AZ
| | - Richard L Coletta
- School for the Science of Health Care Delivery, Arizona State University, Phoenix, AZ
| | | | | | | | - Lawrence J Mandarino
- Mayo Clinic, Scottsdale, AZ School for the Science of Health Care Delivery, Arizona State University, Phoenix, AZ
| | | | - Dawn K Coletta
- Mayo Clinic, Scottsdale, AZ School for the Science of Health Care Delivery, Arizona State University, Phoenix, AZ Department of Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ
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26
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Takashina C, Tsujino I, Watanabe T, Sakaue S, Ikeda D, Yamada A, Sato T, Ohira H, Otsuka Y, Oyama-Manabe N, Ito YM, Nishimura M. Associations among the plasma amino acid profile, obesity, and glucose metabolism in Japanese adults with normal glucose tolerance. Nutr Metab (Lond) 2016; 13:5. [PMID: 26788116 PMCID: PMC4717594 DOI: 10.1186/s12986-015-0059-5] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 12/22/2015] [Indexed: 11/10/2022] Open
Abstract
Background Amino acids (AAs) are emerging as a new class of effective molecules in the etiology of obesity and diabetes mellitus. However, most investigations have focused on subjects with obesity and/or impaired glucose regulation; the possible involvement of AAs in the initial phase of glucose dysregulation remains poorly understood. Furthermore, little attention has been given to possible associations between the pattern/degree of fat deposition and the plasma AA profile. Our objective was therefore to determine the relationships between plasma AA concentrations and the type/degree of obesity and glucose regulation in Japanese adults with normal glucose tolerance. Methods Eighty-three subjects with normal glucose tolerance were classified as obese or nonobese and as visceral obesity or nonvisceral obesity. Correlations between the plasma levels of 23 AAs and somatometric measurements, visceral fat area (VFA), subcutaneous fat area (SFA), and 75-g oral glucose tolerance test results were analyzed. Results Obesity or visceral obesity was associated with higher levels of branched-chain AAs (isoleucine, leucine, and valine), lysine, tryptophan, cystine, and glutamate but lower levels of asparagine, citrulline, glutamine, glycine, and serine (p < 0.04). Age- and gender-adjusted analyses indicated that VFA was positively correlated with tryptophan and glutamate levels, whereas VFA and SFA were negatively correlated with citrulline, glutamine, and glycine levels (p < 0.05). The fasting and 2-h plasma glucose levels or the homeostasis model assessment of insulin resistance were positively correlated with valine, glutamate, and tyrosine levels but negatively correlated with citrulline, glutamine, and glycine levels. The homeostasis model assessment for the β-cell function index was positively correlated with leucine, tryptophan, valine, and glutamate levels but negatively correlated with citrulline, glutamine, glycine, and serine levels (p < 0.05). Conclusions The present study identified specific associations between 10 AAs and the type/degree of obesity, and indices of glucose/insulin regulation, in Japanese adults with preserved glucose metabolism. With the growing concern about the increasing prevalence of obesity and diabetes, the possible roles of these AAs as early markers and/or precursors warrant further investigation. Electronic supplementary material The online version of this article (doi:10.1186/s12986-015-0059-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Chisa Takashina
- First Department of Medicine, Hokkaido University Hospital, North 14, West 5, Kita-ku, Sapporo, 060-8648 Japan
| | - Ichizo Tsujino
- First Department of Medicine, Hokkaido University Hospital, North 14, West 5, Kita-ku, Sapporo, 060-8648 Japan
| | - Taku Watanabe
- First Department of Medicine, Hokkaido University Hospital, North 14, West 5, Kita-ku, Sapporo, 060-8648 Japan
| | - Shinji Sakaue
- First Department of Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Daisuke Ikeda
- First Department of Medicine, Hokkaido University Hospital, North 14, West 5, Kita-ku, Sapporo, 060-8648 Japan
| | - Asuka Yamada
- First Department of Medicine, Hokkaido University Hospital, North 14, West 5, Kita-ku, Sapporo, 060-8648 Japan
| | - Takahiro Sato
- First Department of Medicine, Hokkaido University Hospital, North 14, West 5, Kita-ku, Sapporo, 060-8648 Japan
| | - Hiroshi Ohira
- First Department of Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Yoshinori Otsuka
- Department of Human Developmental Science, Faculty of Education, Hokkaido University, Sapporo, Japan
| | - Noriko Oyama-Manabe
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan
| | - Yoichi M Ito
- Department of Biostatistics, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Masaharu Nishimura
- First Department of Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Morphological and Biochemical Effects on the Skeletal Muscle of Ovariectomized Old Female Rats Submitted to the Intake of Diets with Vegetable or Animal Protein and Resistance Training. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:9251064. [PMID: 26885253 PMCID: PMC4738956 DOI: 10.1155/2016/9251064] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 12/05/2015] [Accepted: 12/07/2015] [Indexed: 12/25/2022]
Abstract
Introduction. Sarcopenia is a process characterized by reduction in protein mass and muscle strength with increasing age, especially in the postmenopausal period, resulting in functional limitations and with great impact on the physical autonomy of the elderly. Objective. To evaluate the effects of diets with vegetable proteins (VP) or animal proteins (AP) associated with resistance training (RT) on the structural and biochemical parameters of the medial gastrocnemius muscle in Wistar rats with sarcopenia. Methods. An experimental model with ovariectomized rats was used to induce sarcopenia and resistance training. The histochemical technique was used for the typing of muscle fibers, the cross-sectional area of myocytes, and volume densities of myocytes and interstitium; the technique of Picrosirius stain was used to highlight the collagen fibers. Results. The VP diet was not able to minimize the effects of sarcopenia in the medial gastrocnemius of sedentary animals and when associated with RT, it promoted maintenance of the CSA, attenuating the atrophy of type IIB fibers in the medial gastrocnemius. The AP diet in sedentary animals protected the type I fibers. When combined with RT, the AP promoted muscle remodeling, with reduction in volume density of type I and IIA fibers, and increase of IIB fibers, together with an increase in collagen volume density. Conclusion. The data suggest a tendency to better results of hypertrophy in animal groups that consumed the AP diet, even the sedentary animals, although more evident in those trained.
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Effect of 10% dietary protein intake on whole body protein kinetics in type 2 diabetic adults. Clin Nutr 2015; 34:1115-21. [DOI: 10.1016/j.clnu.2014.12.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 12/11/2014] [Accepted: 12/29/2014] [Indexed: 12/25/2022]
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Williamson DL, Dungan CM, Mahmoud AM, Mey JT, Blackburn BK, Haus JM. Aberrant REDD1-mTORC1 responses to insulin in skeletal muscle from Type 2 diabetics. Am J Physiol Regul Integr Comp Physiol 2015; 309:R855-63. [PMID: 26269521 PMCID: PMC4666944 DOI: 10.1152/ajpregu.00285.2015] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 08/04/2015] [Indexed: 11/22/2022]
Abstract
The objective of this study was to establish whether alterations in the REDD1-mTOR axis underlie skeletal muscle insensitivity to insulin in Type 2 diabetic (T2D), obese individuals. Vastus lateralis muscle biopsies were obtained from lean, control and obese, T2D subjects under basal and after a 2-h hyperinsulinemic (40 mU·m(-2)·min(-1))-euglycemic (5 mM) clamp. Muscle lysates were examined for total REDD1, and phosphorylated Akt, S6 kinase 1 (S6K1), 4E-BP1, ERK1/2, and MEK1/2 via Western blot analysis. Under basal conditions [(-) insulin], T2D muscle exhibited higher S6K1 and ERK1/2 and lower 4E-BP1 phosphorylation (P < 0.05), as well as elevations in blood cortisol, glucose, insulin, glycosylated hemoglobin (P < 0.05) vs. lean controls. Following insulin infusion, whole body glucose disposal rates (GDR; mg/kg/min) were lower (P < 0.05) in the T2D vs. the control group. The basal-to-insulin percent change in REDD1 expression was higher (P < 0.05) in muscle from the T2D vs. the control group. Whereas, the basal-to-insulin percent change in muscle Akt, S6K1, ERK1/2, and MEK1/2 phosphorylation was significantly lower (P < 0.05) in the T2D vs. the control group. Findings from this study propose a REDD1-regulated mechanism in T2D skeletal muscle that may contribute to whole body insulin resistance and may be a target to improve insulin action in insulin-resistant individuals.
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Affiliation(s)
- David L Williamson
- Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, New York; and
| | - Cory M Dungan
- Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, New York; and
| | - Abeer M Mahmoud
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois
| | - Jacob T Mey
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois
| | - Brian K Blackburn
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois
| | - Jacob M Haus
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois
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Murphy J, Chevalier S, Gougeon R, Goulet ÉD, Morais JA. Effect of obesity and type 2 diabetes on protein anabolic response to insulin in elderly women. Exp Gerontol 2015; 69:20-6. [DOI: 10.1016/j.exger.2015.06.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 06/04/2015] [Accepted: 06/05/2015] [Indexed: 12/25/2022]
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Garibotto G, Sofia A, Russo R, Paoletti E, Bonanni A, Parodi EL, Viazzi F, Verzola D. Insulin sensitivity of muscle protein metabolism is altered in patients with chronic kidney disease and metabolic acidosis. Kidney Int 2015; 88:1419-1426. [PMID: 26308671 PMCID: PMC4678169 DOI: 10.1038/ki.2015.247] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/05/2015] [Accepted: 06/25/2015] [Indexed: 12/23/2022]
Abstract
An emergent hypothesis is that a resistance to the anabolic drive by insulin may contribute to loss of strength and muscle mass in patients with chronic kidney disease (CKD). We tested whether insulin resistance extends to protein metabolism using the forearm perfusion method with arterial insulin infusion in 7 patients with CKD and metabolic acidosis (bicarbonate 19 mmol/l) and 7 control individuals. Forearm glucose balance and protein turnover (2H-phenylalanine kinetics) were measured basally and in response to insulin infused at different rates for 2 h to increase local forearm plasma insulin concentration by approximately 20 and 50 μU/ml. In response to insulin, forearm glucose uptake was significantly increased to a lesser extent (−40%) in patients with CKD than controls. In addition, whereas in the controls net muscle protein balance and protein degradation were decreased by both insulin infusion rates, in patients with CKD net protein balance and protein degradation were sensitive to the high (0.035 mU/kg per min) but not the low (0.01 mU/kg per min) insulin infusion. Besides blunting muscle glucose uptake, CKD and acidosis interfere with the normal suppression of protein degradation in response to a moderate rise in plasma insulin. Thus, alteration of protein metabolism by insulin may lead to changes in body tissue composition which may become clinically evident in conditions characterized by low insulinemia.
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Affiliation(s)
- Giacomo Garibotto
- Department of Internal Medicine, Division of Nephrology, Dialysis and Transplantation, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
| | - Antonella Sofia
- Department of Internal Medicine, Division of Nephrology, Dialysis and Transplantation, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
| | - Rodolfo Russo
- Department of Internal Medicine, Division of Nephrology, Dialysis and Transplantation, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
| | - Ernesto Paoletti
- Department of Internal Medicine, Division of Nephrology, Dialysis and Transplantation, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
| | - Alice Bonanni
- Department of Internal Medicine, Division of Nephrology, Dialysis and Transplantation, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
| | - Emanuele L Parodi
- Department of Internal Medicine, Division of Nephrology, Dialysis and Transplantation, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
| | - Francesca Viazzi
- Department of Internal Medicine, Division of Nephrology, Dialysis and Transplantation, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
| | - Daniela Verzola
- Department of Internal Medicine, Division of Nephrology, Dialysis and Transplantation, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
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Park S, Sadanala KC, Kim EK. A Metabolomic Approach to Understanding the Metabolic Link between Obesity and Diabetes. Mol Cells 2015; 38:587-96. [PMID: 26072981 PMCID: PMC4507023 DOI: 10.14348/molcells.2015.0126] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 05/22/2015] [Accepted: 05/26/2015] [Indexed: 12/19/2022] Open
Abstract
Obesity and diabetes arise from an intricate interplay between both genetic and environmental factors. It is well recognized that obesity plays an important role in the development of insulin resistance and diabetes. Yet, the exact mechanism of the connection between obesity and diabetes is still not completely understood. Metabolomics is an analytical approach that aims to detect and quantify small metabolites. Recently, there has been an increased interest in the application of metabolomics to the identification of disease biomarkers, with a number of well-known biomarkers identified. Metabolomics is a potent approach to unravel the intricate relationships between metabolism, obesity and progression to diabetes and, at the same time, has potential as a clinical tool for risk evaluation and monitoring of disease. Moreover, metabolomics applications have revealed alterations in the levels of metabolites related to obesity-associated diabetes. This review focuses on the part that metabolomics has played in elucidating the roles of metabolites in the regulation of systemic metabolism relevant to obesity and diabetes. It also explains the possible metabolic relation and association between the two diseases. The metabolites with altered profiles in individual disorders and those that are specifically and similarly altered in both disorders are classified, categorized and summarized.
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Affiliation(s)
- Seokjae Park
- Department of Brain & Cognitive Sciences, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
- Neurometabolomics Research Center, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
| | - Krishna Chaitanya Sadanala
- Neurometabolomics Research Center, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
| | - Eun-Kyoung Kim
- Department of Brain & Cognitive Sciences, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
- Neurometabolomics Research Center, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
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Seibert R, Abbasi F, Hantash FM, Caulfield MP, Reaven G, Kim SH. Relationship between insulin resistance and amino acids in women and men. Physiol Rep 2015; 3:3/5/e12392. [PMID: 25952934 PMCID: PMC4463823 DOI: 10.14814/phy2.12392] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Insulin resistance has been associated with higher plasma amino acid (AA) concentrations, but majority of studies have used indirect measures of insulin resistance. Our main objective was to define the relationship between plasma AA concentrations and a direct measure of insulin resistance in women and men. This was a cross-sectional study of 182 nondiabetic individuals (118 women and 64 men) who had measurement of 24 AAs and steady-state plasma glucose (SSPG) concentration (insulin resistance) using the insulin suppression test. Fourteen out of 24 AA concentrations were significantly (P < 0.05) higher in men than women; only glycine was lower in men. Majority of these AAs were positively associated with SSPG; only glycine concentration was negatively associated. Glutamic acid, isoleucine, leucine, and tyrosine concentrations had the strongest correlation with SSPG (r ≥ 0.4, P < 0.001). The degree of association was similar in women and men, independent of obesity, and similar to traditional markers of insulin resistance (e.g., glucose, triglyceride, high-density lipoprotein cholesterol). Compared with women, men tended to have a more unfavorable AA profile with higher concentration of AAs associated with insulin resistance and less glycine. However, the strength of association between a direct measurement of insulin resistance and AA concentrations were similar between sexes and equivalent to several traditional markers of insulin resistance.
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Affiliation(s)
- Ryan Seibert
- Department of Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Fahim Abbasi
- Department of Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Feras M Hantash
- Quest Diagnostics Nichols Institute, San Juan Capistrano, California, USA
| | | | - Gerald Reaven
- Department of Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Sun H Kim
- Department of Medicine, Stanford University School of Medicine, Stanford, California, USA
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Stephens FB, Chee C, Wall BT, Murton AJ, Shannon CE, van Loon LJC, Tsintzas K. Lipid-induced insulin resistance is associated with an impaired skeletal muscle protein synthetic response to amino acid ingestion in healthy young men. Diabetes 2015; 64:1615-20. [PMID: 25524913 DOI: 10.2337/db14-0961] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 12/11/2014] [Indexed: 11/13/2022]
Abstract
The ability to maintain skeletal muscle mass appears to be impaired in insulin-resistant conditions, such as type 2 diabetes, that are characterized by muscle lipid accumulation. The current study investigated the effect of acutely increasing lipid availability on muscle protein synthesis. Seven healthy young male volunteers underwent a 7-h intravenous infusion of l-[ring-(2)H5]phenylalanine on two randomized occasions combined with 0.9% saline or 10% Intralipid at 100 mL/h. After a 4-h "basal" period, a 21-g bolus of amino acids was administered and a 3-h hyperinsulinemic-euglycemic clamp was commenced ("fed" period). Muscle biopsy specimens were obtained from the vastus lateralis at 1.5, 4, and 7 h. Lipid infusion reduced fed whole-body glucose disposal by 20%. Furthermore, whereas the mixed muscle fractional synthetic rate increased from the basal to the fed period during saline infusion by 2.2-fold, no change occurred during lipid infusion, despite similar circulating insulin and leucine concentrations. This "anabolic resistance" to insulin and amino acids with lipid infusion was associated with a complete suppression of muscle 4E-BP1 phosphorylation. We propose that increased muscle lipid availability may contribute to anabolic resistance in insulin-resistant conditions by impairing translation initiation.
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Affiliation(s)
- Francis B Stephens
- Medical Research Council/Arthritis Research UK Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Nottingham, U.K.
| | - Carolyn Chee
- Medical Research Council/Arthritis Research UK Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Nottingham, U.K
| | - Benjamin T Wall
- School for Nutrition, Toxicology and Metabolism, Maastricht University, Maastricht, the Netherlands
| | - Andrew J Murton
- Division of Nutritional Sciences, School of Biosciences, University of Nottingham, Nottingham, U.K
| | - Chris E Shannon
- Medical Research Council/Arthritis Research UK Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Nottingham, U.K
| | - Luc J C van Loon
- School for Nutrition, Toxicology and Metabolism, Maastricht University, Maastricht, the Netherlands
| | - Kostas Tsintzas
- Medical Research Council/Arthritis Research UK Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Nottingham, U.K
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Neis EPJG, Dejong CHC, Rensen SS. The role of microbial amino acid metabolism in host metabolism. Nutrients 2015; 7:2930-46. [PMID: 25894657 PMCID: PMC4425181 DOI: 10.3390/nu7042930] [Citation(s) in RCA: 532] [Impact Index Per Article: 59.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 03/21/2015] [Accepted: 04/01/2015] [Indexed: 12/12/2022] Open
Abstract
Disruptions in gut microbiota composition and function are increasingly implicated in the pathogenesis of obesity, insulin resistance, and type 2 diabetes mellitus. The functional output of the gut microbiota, including short-chain fatty acids and amino acids, are thought to be important modulators underlying the development of these disorders. Gut bacteria can alter the bioavailability of amino acids by utilization of several amino acids originating from both alimentary and endogenous proteins. In turn, gut bacteria also provide amino acids to the host. This could have significant implications in the context of insulin resistance and type 2 diabetes mellitus, conditions associated with elevated systemic concentrations of certain amino acids, in particular the aromatic and branched-chain amino acids. Moreover, several amino acids released by gut bacteria can serve as precursors for the synthesis of short-chain fatty acids, which also play a role in the development of obesity. In this review, we aim to compile the available evidence on the contribution of microbial amino acids to host amino acid homeostasis, and to assess the role of the gut microbiota as a determinant of amino acid and short-chain fatty acid perturbations in human obesity and type 2 diabetes mellitus.
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Affiliation(s)
- Evelien P J G Neis
- Department of Surgery, Maastricht University Medical Center, PO Box 616, 6200 MD Maastricht, The Netherlands.
| | - Cornelis H C Dejong
- Department of Surgery, Maastricht University Medical Center, PO Box 616, 6200 MD Maastricht, The Netherlands.
| | - Sander S Rensen
- Department of Surgery, Maastricht University Medical Center, PO Box 616, 6200 MD Maastricht, The Netherlands.
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Chevalier S, Burgos SA, Morais JA, Gougeon R, Bassil M, Lamarche M, Marliss EB. Protein and glucose metabolic responses to hyperinsulinemia, hyperglycemia, and hyperaminoacidemia in obese men. Obesity (Silver Spring) 2015; 23:351-8. [PMID: 25452199 DOI: 10.1002/oby.20943] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 09/29/2014] [Indexed: 12/28/2022]
Abstract
OBJECTIVE In insulin-resistant states, resistance of protein anabolism occurs concurrently with that of glucose, but can be compensated for by abundant amino acid (AA) provision. This effect and its mechanism were sought in obesity. METHODS Pancreatic clamps were performed in 8 lean and 11 obese men, following 5-h postabsorptive, 3-h infusions of octreotide, basal glucagon, and growth hormone, with clamped postprandial-level insulin, glucose, and AA. Whole-body [1-(13) C]-leucine and [3-(3) H]-glucose kinetics, skeletal muscle protein ((2) H5 -phenylalanine) fractional synthesis rates, and insulin signaling were determined. RESULTS Clamp Δ insulin and Δ branched-chain AA did not differ; fasting glucagon and growth hormone were maintained. Glucose uptake was 20% less in obese concurrent with less Akt(Ser473) , but also less IRS-1(Ser636/639) phosphorylation. Stimulation of whole-body, myofibrillar, and sarcoplasmic protein synthesis was similar. Whole-body protein catabolism suppression tended to be less (P=0.06), resulting in lesser net balance (1.09 ± 0.07 vs. 1.31 ± 0.08 μmol [kg FFM(-1) ] min(-1) , P=0.048). Increments in muscle S6K1(Thr389) phosphorylation were less in the obese, but 4E-BP1(Ser65) did not differ. CONCLUSIONS Hyperaminoacidemia with hyperinsulinemia stimulated protein synthesis (possibly via nutrient signaling) normally in obesity, but suppression of proteolysis may be compromised. Whether long-term high protein intakes could compensate for the insulin resistance of protein anabolism remains to be determined.
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Affiliation(s)
- Stéphanie Chevalier
- Crabtree Nutrition Laboratories, Department of Medicine, McGill University, and Research Institute of the McGill University Health Centre, Montreal, Quebec City, Canada
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Liebau F, Jensen MD, Nair KS, Rooyackers O. Upper-body obese women are resistant to postprandial stimulation of protein synthesis. Clin Nutr 2014; 33:802-7. [PMID: 24269078 PMCID: PMC4019711 DOI: 10.1016/j.clnu.2013.11.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 10/18/2013] [Accepted: 11/01/2013] [Indexed: 01/01/2023]
Abstract
BACKGROUND & AIMS Upper-body, i.e. visceral, obesity is associated with insulin resistance and impaired protein synthesis. It is unclear whether postprandial stimulation of protein synthesis is affected by body fat distribution. We investigated the postprandial protein anabolic response in a cohort of obese women. METHODS Participants were studied after an overnight fast and after a mixed meal, grouped as upper-body obese (UBO, waist-to-hip ratio, WHR, >0.85, n = 6) vs. lower-body obese (LBO, WHR <0.80, n = 7). Lipid and carbohydrate metabolism were assessed by measurements of plasma free fatty acids (FFA), insulin and glucose plasma concentrations, and calculation of the Quicki index from fasting glucose and insulin values. Different labels of stable isotopes of phenylalanine were administered intravenously and orally, and leg and whole-body protein breakdown and synthesis were calculated from phenylalanine/tyrosine isotopic enrichments in femoral arterial and venous blood, using equations for steady-state kinetics. Data are denoted as mean ± SD. RESULTS Age (38 vs. 40, p = 0.549) and body-mass index (33.7 ± 1.9 vs. 35.0 ± 1.8, p = 0.241) were similar in both groups. UBO subjects had more visceral fat (p = 0.002) and higher fat-free body mass (FFM) (p = 0.015). Plasma insulin concentrations were greater in UBO than LBO women (p = 0.013), and UBO were less insulin sensitive (Quicki = 0.32 ± 0.01 vs. 0.36 ± 0.02, p = 0.005). Protein kinetics across the leg were not different between groups. Fasting whole body protein balance was similarly negative in both groups (UBO -6.5 ± 2.4 vs. LBO -7.6 ± 0.9 μmol/kgFFM/h, p = 1.0). Postprandially, whole body protein balance became less positive in UBO than in LBO (14.8 ± 3.7 vs. 20.2 ± 3.7 μmol/kgFFM/h, p = 0.017). CONCLUSIONS Whole-body protein balance following a meal is less positive in upper-body obese, insulin-resistant, women than in lower-body obese women.
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Affiliation(s)
- Felix Liebau
- Department of Anesthesiology and Intensive Care, Karolinska University Hospital Huddinge and Karolinska Institutet, Stockholm, Sweden.
| | | | | | - Olav Rooyackers
- Department of Anesthesiology and Intensive Care, Karolinska University Hospital Huddinge and Karolinska Institutet, Stockholm, Sweden.
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Adegoke OAJ, Bates HE, Kiraly MA, Vranic M, Riddell MC, Marliss EB. Exercise in ZDF rats does not attenuate weight gain, but prevents hyperglycemia concurrent with modulation of amino acid metabolism and AKT/mTOR activation in skeletal muscle. Eur J Nutr 2014; 54:751-9. [PMID: 25120109 DOI: 10.1007/s00394-014-0754-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 08/01/2014] [Indexed: 10/24/2022]
Abstract
PURPOSE Protein metabolism is altered in obesity, accompanied by elevated plasma amino acids (AA). Previously, we showed that exercise delayed progression to type 2 diabetes in obese ZDF rats with maintenance of β cell function and reduction in hyperglucocorticoidemia. We hypothesized that exercise would correct the abnormalities we found in circulating AA and other indices of skeletal muscle protein metabolism. METHODS Male obese prediabetic ZDF rats (7-10/group) were exercised (swimming) 1 h/day, 5 days/week from ages 6-19 weeks, and compared with age-matched obese sedentary and lean ZDF rats. RESULTS Food intake and weight gain were unaffected. Protein metabolism was altered in obese rats as evidenced by increased plasma concentrations of essential AA, and increased muscle phosphorylation (ph) of Akt(ser473) (187%), mTOR(ser2448) (140%), eIF4E-binding protein 1 (4E-BP1) (111%), and decreased formation of 4E-BP1*eIF4E complex (75%, 0.01 ≤ p ≤ 0.05 for all measures) in obese relative to lean rats. Exercise attenuated the increase in plasma essential AA concentrations and muscle Akt and mTOR phosphorylation. Exercise did not modify phosphorylation of S6K1, S6, and 4E-BP1, nor the formation of 4E-BP1*eIF4E complex, mRNA levels of ubiquitin or the ubiquitin ligase MAFbx. Positive correlations were observed between ph-Akt and fed circulating branched-chain AA (r = 0.56, p = 0.008), postprandial glucose (r = 0.42, p = 0.04) and glucose AUC during an IPGTT (r = 0.44, p = 0.03). CONCLUSION Swimming exercise-induced attenuation of hyperglycemia in ZDF rats is independent of changes in body weight and could result in part from modulation of muscle AKT activation acting via alterations of systemic AA metabolism.
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Affiliation(s)
- Olasunkanmi A J Adegoke
- Crabtree Nutrition Laboratories, Division of Endocrinology and Metabolism, Department of Medicine, McGill University Health Centre, Montreal, Canada,
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Chevalier S, Farsijani S. Cancer cachexia and diabetes: similarities in metabolic alterations and possible treatment. Appl Physiol Nutr Metab 2013; 39:643-53. [PMID: 24869969 DOI: 10.1139/apnm-2013-0369] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cancer cachexia is a metabolic syndrome featuring many alterations typical of type 2 diabetes (T2D). While muscle wasting is a hallmark of cachexia, epidemiological evidence also supports an accelerated age-related muscle loss in T2D. Insulin resistance manifests in both conditions and impairs glucose disposal and protein anabolism by tissues. A greater contribution of gluconeogenesis to glucose production may limit amino acid availability for muscle protein synthesis, further aggravating muscle loss. In the context of inter-dependence between glucose and protein metabolism, the present review summarizes the current state of knowledge on alterations that may lead to muscle wasting in human cancer. By highlighting the similarities with T2D, a disease that has been more extensively studied, the objective of this review is to provide a better understanding of the pathophysiology of cancer cachexia and to consider potential treatments usually targeted for T2D. Nutritional approaches aimed at stimulating protein anabolism might include specially formulated food with optimal protein and amino acid composition. Because the gradual muscle loss in T2D may be attenuated by diabetes treatment, anti-diabetic drugs might be considered in cachexia treatment. Metformin emerges as a choice candidate as it acts both on reducing gluconeogenesis and improving insulin sensitivity, and has demonstrated tumour suppressor properties in multiple cancer types. Such a multimodal approach to slow or reverse muscle wasting in cachexia warrants further investigation.
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Affiliation(s)
- Stéphanie Chevalier
- a Department of Medicine and School of Dietetics and Human Nutrition, Crabtree Nutrition Laboratories, McGill University Health Centre-Royal Victoria Hospital, 687 ave des Pins Ouest, room H6.61, Montreal, QC H3A 1A1, Canada
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Deger SM, Sundell MB, Siew ED, Egbert P, Ellis CD, Sha F, Ikizler TA, Hung AM. Insulin resistance and protein metabolism in chronic hemodialysis patients. J Ren Nutr 2013; 23:e59-66. [PMID: 23194840 PMCID: PMC3852904 DOI: 10.1053/j.jrn.2012.08.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 08/14/2012] [Accepted: 08/18/2012] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVE Loss of lean body mass (sarcopenia) is associated with increased morbidity and mortality in patients receiving chronic hemodialysis (CHD). Insulin resistance (IR), which is highly prevalent in patients receiving CHD, has been proposed to play a critical role in the development of sarcopenia. The aim of this study was to examine the effect of IR on amino acid metabolism in patients receiving CHD. DESIGN This was a cross-sectional study. SUBJECTS The study included 12 prevalent (i.e., patients that have been on dialysis for more than 90 days) African American patients receiving CHD. METHODS IR was measured as glucose disposal rate (GDR) determined from hyperinsulinemic euglycemic clamp (HGEC) studies performed 3 consecutive times. Plasma amino acid (AA) concentrations were measured by real-time high-performance liquid chromatography (HPLC) throughout the clamp study. The primary outcome was percentage change in leucine concentrations during the clamp study. The main predictor was the GDR measured simultaneously during the HGEC studies. Mixed model analysis was used to account for repeated measures. RESULTS All individual AA concentrations declined significantly in response to high-dose insulin administration (P < .001). There was a significant direct association between GDR by HECG studies and the percentage change in leucine concentration (P = .02). Although positive correlations were observed between GDR values and concentration changes from baseline for other AAs, these associations did not reach statistical significance. CONCLUSIONS Our results suggest that the severity of IR of carbohydrate metabolism is associated with a lesser decline in plasma leucine concentrations, suggesting a similar resistance to protein anabolism. Insulin resistance represents a potential mechanism for sarcopenia commonly observed in patients receiving CHD.
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Affiliation(s)
- Serpil M. Deger
- Division of Nephrology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Mary B. Sundell
- Division of Nephrology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Edward D. Siew
- Division of Nephrology, Vanderbilt University Medical Center, Nashville, Tennessee
- Division of Nephrology, Clinical Science Research & Development, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee
| | - Phyllis Egbert
- Division of Nephrology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Charles D. Ellis
- Division of Nephrology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Feng Sha
- Division of Nephrology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - T. Alp Ikizler
- Division of Nephrology, Vanderbilt University Medical Center, Nashville, Tennessee
- Division of Nephrology, Clinical Science Research & Development, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee
| | - Adriana M. Hung
- Division of Nephrology, Vanderbilt University Medical Center, Nashville, Tennessee
- Division of Nephrology, Clinical Science Research & Development, Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee
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41
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Gougeon R. Insulin resistance of protein metabolism in type 2 diabetes and impact on dietary needs: a review. Can J Diabetes 2013; 37:115-20. [PMID: 24070802 DOI: 10.1016/j.jcjd.2013.01.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 10/17/2012] [Accepted: 01/14/2013] [Indexed: 02/06/2023]
Abstract
Evidence shows that the metabolism of protein is altered in type 2 diabetes mellitus and insulin resistance not only applies to glucose and lipid but protein metabolism as well. Population surveys report greater susceptibility to loss of lean tissue and muscle strength with aging in diabetes. Prevention of sarcopenia requires that protein receives more attention in dietary prescriptions. Protein intake of 1-1.2 g/kg of body weight (with weight at a body mass index of 25 kg/m(2))/day may be distributed equally among 3 meals a day, including breakfast, to optimize anabolism. Adopting a dietary pattern that provides a high plant-to-animal ratio and greater food volume favouring consumption of vegetables, legumes, fruits, complemented with fish, low fat dairy and meat (preferably cooked slowly in moisture), soy and nuts may assist with metabolic and weight control. Depending on the magnitude of energy restriction, usual protein intake should be maintained or increased, and the caloric deficit taken from fat and carbohydrate foods. Exercise before protein-rich meals improves skeletal muscle protein anabolism. Because high levels of amino acids lower glucose uptake in individuals without diabetes, the challenge remains to define the optimal protein intake and exercise regimen to protect from losses of muscle mass and strength while maintaining adequate glucose control in type 2 diabetes.
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Affiliation(s)
- Réjeanne Gougeon
- McGill Nutrition and Food Science Centre, McGill University Health Centre, McGill University, Montreal, QC, Canada.
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Abstract
PURPOSE OF REVIEW Protein anabolism is abnormal in human type 2 diabetes (T2DM). We review studies of anabolic stimuli that identify potential causes. If uncorrected, and combined with aging effects, they will compromise muscle function and mass. Knowing causes can guide studies of preventive and treatment measures. RECENT FINDINGS T2DM accelerates age-related decreases in muscle mass. This could be related to insulin resistance of whole-body protein anabolism demonstrated in hyperglycemic obese men. In contrast, their protein anabolic response to hyperaminoacidemia suggested that ample amino acid administration, especially branched chain amino acids might overcome such insulin resistance. One study of chronic leucine supplementation in elderly T2DM patients did not increase muscle mass. However, they lacked sarcopenia and had adequate dietary protein intake, so may be atypical. Exercise induced similar increases in muscle protein synthesis, mass and strength in healthy and T2DM patients suggesting that physical activity might also overcome insulin resistance of protein anabolism. SUMMARY Muscle protein anabolism in T2DM is resistant to the action of insulin but perhaps not to amino acid supply or exercise. Whether leucine supplementation improves muscle mass and function in persons with T2DM (especially elderly) with reduced protein intake or muscle mass needs to be determined.
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Affiliation(s)
- Maya S Bassil
- School of Arts and Sciences, Natural Science Division, Lebanese American University, Beirut, Lebanon
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43
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Guillet C, Masgrau A, Walrand S, Boirie Y. Impaired protein metabolism: interlinks between obesity, insulin resistance and inflammation. Obes Rev 2012; 13 Suppl 2:51-7. [PMID: 23107259 DOI: 10.1111/j.1467-789x.2012.01037.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Metabolic and structural changes in skeletal muscle that accompany obesity are often associated with the development of insulin resistance. The first events in the pathogenesis of this disorder are considered as an accumulation of lipids within skeletal muscle due to blunted muscle capacity to oxidize fatty acids. Fat infiltration is also associated with muscle fibre typology modification, decrease in muscle mass and impairments in muscle strength. Thus, as a result of obesity, mobility and quality of life are affected, and this is in part due to quantitative and qualitative impairments in skeletal muscle. In addition, the insulin resistance related to obesity results not only in defective insulin-stimulated glucose disposal but has also detrimental consequences on protein metabolism at the skeletal muscle level and whole-body level. This review highlights the involvement of fat accumulation and insulin resistance in metabolic disorders occurring in skeletal muscle during the development of obesity, and the impairments in the regulation of protein metabolism and protein turnover in the links between obesity, metabolic inflammation and insulin resistance.
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Affiliation(s)
- C Guillet
- Clermont Université, Université d'Auvergne/INRA, Unité de Nutrition Humaine, 58 rue Montalembert, Clermont-Ferrand, France.
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Lawlor DA, Relton C, Sattar N, Nelson SM. Maternal adiposity--a determinant of perinatal and offspring outcomes? Nat Rev Endocrinol 2012; 8:679-88. [PMID: 23007319 DOI: 10.1038/nrendo.2012.176] [Citation(s) in RCA: 133] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Experimental and animal data suggest that maternal obesity during pregnancy adversely affects offspring health in the short-term and the long-term. Whether these effects occur in humans and influence population health is less clear. This Review explores evidence from intervention studies and observational studies that have used designs (such as family-based comparisons and Mendelian randomization) that might help improve understanding of the causal effects of maternal obesity in humans. Collectively, human studies provide evidence that maternal overweight and obesity is causally related to pregnancy complications, increased offspring weight and adiposity at birth, and the difficulties associated with delivery of large-for-gestational-age infants. The underlying mechanisms for these effects probably involve maternal and fetal dysregulation of glucose, insulin, lipid and amino acid metabolism. Some evidence exists that extreme maternal obesity (BMI ≥40 kg/m(2)) is causally related to a long-term increase in offspring adiposity, but further exploration of this relationship is needed. High gestational weight gain may result in a long-term increase in offspring adiposity if women are already overweight or have obesity at the start of pregnancy. To date, little high-quality human evidence exists that any of these effects are mediated by epigenetic mechanisms, but approaches to appropriately test this possibility are being developed.
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Affiliation(s)
- Debbie A Lawlor
- MRC Centre for Causal Analyses in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK.
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45
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Normal protein anabolic response to hyperaminoacidemia in insulin-resistant patients with lung cancer cachexia. Clin Nutr 2012; 31:765-73. [DOI: 10.1016/j.clnu.2012.05.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 04/19/2012] [Accepted: 05/05/2012] [Indexed: 11/30/2022]
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46
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Levine ME, Crimmins EM. The impact of insulin resistance and inflammation on the association between sarcopenic obesity and physical functioning. Obesity (Silver Spring) 2012; 20:2101-6. [PMID: 22310233 PMCID: PMC3527629 DOI: 10.1038/oby.2012.20] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Age associated increases in visceral adiposity and decreases in muscle mass (sarcopenia) have been shown to contribute to disability in late life. Furthermore, there is evidence that obesity-related physiological states, such as insulin resistance and systemic inflammation, may exacerbate physical functioning problems. Both conditions have been shown to prompt hypercatabolism and impair the anabolic effect of muscles, ultimately stimulating protein breakdown and suppressing muscle synthesis. This cross-sectional study investigates whether insulin resistance and inflammation partially account for the associations between decreased physical functioning and sarcopenic obesity. Subjects include 2,287 males and females aged 60 and older without diagnosed diabetes from the National Health and Nutrition Examination Survey (NHANES 1999-2004). Body composition measurements indicating waist circumference and appendicular skeletal muscle mass, measured by dual-energy X-ray absorptiometry (DXA), were used to construct four body composition categories--healthy, sarcopenic nonobese, nonsarcopenic obese, and sarcopenic obese. Physical functioning was measured using self-reports of difficulty performing six activities. The homeostasis model assessment (IR(HOMA)) was used to measure insulin resistance, while inflammatory state was assessed through measurement of serum C-reactive protein (CRP). Modified Poisson regression models were used to examine the association between physical functioning and body composition, and to evaluate whether differences in insulin resistance or inflammation partially explained this relationship. In the analysis, we controlled for possible confounders such as age, education, sex, height, and race/ethnicity. Findings suggest that physical functioning problems are increased in those with sarcopenic obesity, sarcopenic nonobesity and nonsarcopenic obesity. Furthermore, these associations may be influenced by differences in insulin resistance among different body composition phenotypes.
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Affiliation(s)
- Morgan E Levine
- Department of Gerontology, Davis School of Gerontology, University of Southern California, Los Angeles, California, USA.
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Davalli AM, Perego C, Folli FB. The potential role of glutamate in the current diabetes epidemic. Acta Diabetol 2012; 49:167-83. [PMID: 22218826 DOI: 10.1007/s00592-011-0364-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 12/19/2011] [Indexed: 12/27/2022]
Abstract
In the present article, we propose the perspective that abnormal glutamate homeostasis might contribute to diabetes pathogenesis. Previous reports and our recent data indicate that chronically high extracellular glutamate levels exert direct and indirect effects that might participate in the progressive loss of β-cells occurring in both T1D and T2D. In addition, abnormal glutamate homeostasis may impact all the three accelerators of the "accelerator hypothesis" and could partially explain the rising frequency of T1D and T2D.
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Affiliation(s)
- Alberto M Davalli
- Diabetes and Endocrinology Unit, Department of Internal Medicine, San Raffaele Scientific Institute, 20132, Milan, Italy.
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48
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Alemany M. Regulation of adipose tissue energy availability through blood flow control in the metabolic syndrome. Free Radic Biol Med 2012; 52:2108-19. [PMID: 22542444 DOI: 10.1016/j.freeradbiomed.2012.03.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 03/12/2012] [Accepted: 03/13/2012] [Indexed: 12/25/2022]
Abstract
Maintenance of blood flow rate is a critical factor for tissue oxygen and substrate supply. The potentially large mass of adipose tissue deeply influences the body distribution of blood flow. This is due to increased peripheral resistance in obesity and the role of this tissue as the ultimate destination of unused excess of dietary energy. However, adipose tissue cannot grow indefinitely, and the tissue must defend itself against the avalanche of nutrients provoking inordinate growth and inflammation. In the obese, large adipose tissue masses show lower blood flow, limiting the access of excess circulating substrates. Blood flow restriction is achieved by vasoconstriction, despite increased production of nitric oxide, the vasodilatation effects of which are overridden by catecholamines (and probably also by angiotensin II and endothelin). Decreased blood flow reduces the availability of oxygen, provoking massive glycolysis (hyperglycemic conditions), which results in the production of lactate, exported to the liver for processing. However, this produces local acidosis, which elicits the rapid dissociation of oxyhemoglobin, freeing bursts of oxygen in localized zones of the tissue. The excess of oxygen (and of nitric oxide) induces the production of reactive oxygen species, which deeply affect the endothelial, blood, and adipose cells, inducing oxidative and nitrosative damage and eliciting an increased immune response, which translates into inflammation. The result of the defense mechanism for adipose tissue, localized vasoconstriction, may thus help develop a more generalized pathologic response within the metabolic syndrome parameters, extending its effects to the whole body.
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Affiliation(s)
- Marià Alemany
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain.
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49
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Wahl S, Yu Z, Kleber M, Singmann P, Holzapfel C, He Y, Mittelstrass K, Polonikov A, Prehn C, Römisch-Margl W, Adamski J, Suhre K, Grallert H, Illig T, Wang-Sattler R, Reinehr T. Childhood obesity is associated with changes in the serum metabolite profile. Obes Facts 2012; 5:660-70. [PMID: 23108202 DOI: 10.1159/000343204] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Accepted: 06/29/2012] [Indexed: 12/23/2022] Open
Abstract
OBJECTIVE The human serum metabolite profile is reflective of metabolic processes, including pathophysiological changes characteristic of diseases. Therefore, investigation of serum metabolite concentrations in obese children might give new insights into biological mechanisms associated with childhood obesity. METHODS Serum samples of 80 obese and 40 normal-weight children between 6 and 15 years of age were analyzed using a mass spectrometry-based metabolomics approach targeting 163 metabolites. Metabolite concentrations and metabolite ratios were compared between obese and normal-weight children as well as between children of different pubertal stages. RESULTS Metabolite concentration profiles of obese children could be distinguished from those of normal-weight children. After correction for multiple testing, we observed 14 metabolites (glutamine, methionine, proline, nine phospholipids, and two acylcarnitines, p < 3.8 × 10⁻⁴) and 69 metabolite ratios (p < 6.0 × 10⁻⁶) to be significantly altered in obese children. The identified metabolite markers are indicative of oxidative stress and of changes in sphingomyelin metabolism, in β-oxidation, and in pathways associated with energy expenditure. In contrast, pubertal stage was not associated with metabolite concentration differences. CONCLUSION Our study shows that childhood obesity influences the composition of the serum metabolome. If replicated in larger studies, the altered metabolites might be considered as potential biomarkers in the generation of new hypotheses on the biological mechanisms behind obesity.
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Affiliation(s)
- Simone Wahl
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
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50
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Laferrère B, Reilly D, Arias S, Swerdlow N, Gorroochurn P, Bawa B, Bose M, Teixeira J, Stevens RD, Wenner BR, Bain JR, Muehlbauer MJ, Haqq A, Lien L, Shah SH, Svetkey LP, Newgard CB. Differential metabolic impact of gastric bypass surgery versus dietary intervention in obese diabetic subjects despite identical weight loss. Sci Transl Med 2011; 3:80re2. [PMID: 21525399 DOI: 10.1126/scitranslmed.3002043] [Citation(s) in RCA: 288] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Glycemic control is improved more after gastric bypass surgery (GBP) than after equivalent diet-induced weight loss in patients with morbid obesity and type 2 diabetes mellitus. We applied metabolomic profiling to understand the mechanisms of this better metabolic response after GBP. Circulating amino acids (AAs) and acylcarnitines (ACs) were measured in plasma from fasted subjects by targeted tandem mass spectrometry before and after a matched 10-kilogram weight loss induced by GBP or diet. Total AAs and branched-chain AAs (BCAAs) decreased after GBP, but not after dietary intervention. Metabolites derived from BCAA oxidation also decreased only after GBP. Principal components (PC) analysis identified two major PCs, one composed almost exclusively of ACs (PC1) and another with BCAAs and their metabolites as major contributors (PC2). PC1 and PC2 were inversely correlated with pro-insulin concentrations, the C-peptide response to oral glucose, and the insulin sensitivity index after weight loss, whereas PC2 was uniquely correlated with levels of insulin resistance (HOMA-IR). These data suggest that the enhanced decrease in circulating AAs after GBP occurs by mechanisms other than weight loss and may contribute to the better improvement in glucose homeostasis observed with the surgical intervention.
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Affiliation(s)
- Blandine Laferrère
- New York Obesity Nutrition Research Center, St. Luke's Roosevelt Hospital Center, New York, NY 10025, USA.
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