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Jun L, Knight E, Broderick TL, Al-Nakkash L, Tobin B, Geetha T, Babu JR. Moderate-Intensity Exercise Enhances Mitochondrial Biogenesis Markers in the Skeletal Muscle of a Mouse Model Affected by Diet-Induced Obesity. Nutrients 2024; 16:1836. [PMID: 38931191 PMCID: PMC11206830 DOI: 10.3390/nu16121836] [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: 04/17/2024] [Revised: 05/24/2024] [Accepted: 06/07/2024] [Indexed: 06/28/2024] Open
Abstract
Skeletal muscle is composed of bundles of muscle fibers with distinctive characteristics. Oxidative muscle fiber types contain higher mitochondrial content, relying primarily on oxidative phosphorylation for ATP generation. Notably, as a result of obesity, or following prolonged exposure to a high-fat diet, skeletal muscle undergoes a shift in fiber type toward a glycolytic type. Mitochondria are highly dynamic organelles, constantly undergoing mitochondrial biogenesis and dynamic processes. Our study aims to explore the impact of obesity on skeletal muscle mitochondrial biogenesis and dynamics and also ascertain whether the skeletal muscle fiber type shift occurs from the aberrant mitochondrial machinery. Furthermore, we investigated the impact of exercise in preserving the oxidative muscle fiber types despite obesity. Mice were subjected to a normal standard chow and water or high-fat diet with sugar water (HFS) with or without exercise training. After 12 weeks of treatment, the HFS diet resulted in a noteworthy reduction in the markers of mitochondrial content, which was recovered by exercise training. Furthermore, higher mitochondrial biogenesis markers were observed in the exercised group with a subsequent increase in the mitochondrial fission marker. In conclusion, these findings imply a beneficial impact of moderate-intensity exercise on the preservation of oxidative capacity in the muscle of obese mouse models.
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Affiliation(s)
- Lauren Jun
- Department of Nutritional Sciences, Auburn University, Auburn, AL 36849, USA; (L.J.)
| | - Emily Knight
- Department of Nutritional Sciences, Auburn University, Auburn, AL 36849, USA; (L.J.)
| | - Tom L. Broderick
- Department of Physiology, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
| | - Layla Al-Nakkash
- Department of Physiology, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
| | - Brielle Tobin
- The Arizona College of Osteopathic Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Thangiah Geetha
- Department of Nutritional Sciences, Auburn University, Auburn, AL 36849, USA; (L.J.)
- Boshell Metabolic Diseases and Diabetes Program, Auburn University, Auburn, AL 36849, USA
| | - Jeganathan Ramesh Babu
- Department of Nutritional Sciences, Auburn University, Auburn, AL 36849, USA; (L.J.)
- Boshell Metabolic Diseases and Diabetes Program, Auburn University, Auburn, AL 36849, USA
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Kircher K, Chaudry O, Nagel AM, Ghasemikaram M, Uder M, Jakob F, Kohl M, Kemmler W, Engelke K. Effects of high-intensity training on fatty infiltration in paraspinal muscles in elderly males with osteosarcopenia - the randomized controlled FrOST study. BMC Geriatr 2024; 24:141. [PMID: 38326734 PMCID: PMC10851592 DOI: 10.1186/s12877-024-04736-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 01/22/2024] [Indexed: 02/09/2024] Open
Abstract
BACKGROUND Osteosarcopenia is a common geriatric syndrome with an increasing prevalence with age, leading to secondary diseases and complex consequences such as falls and fractures, as well as higher mortality and frailty rates. There is a great need for prevention and treatment strategies. METHODS In this analysis, we used magnetic resonance imaging (MRI) data from the randomised controlled FrOST trial, which enrolled community-dwelling osteosarcopenic men aged > 72 years randomly allocated to 16 months of twice-weekly high-intensity resistance training (HIRT) or a non-training control group. MR Dixon imaging was used to quantify the effects of HIRT on muscle fat infiltration in the paraspinal muscles, determined as changes in muscle tissue, fat faction and intermuscular adipose tissue (IMAT) in the erector spinae and psoas major muscles. Intention-to-treat analysis with multiple imputation was used to analyse the data set. RESULTS After 16 months of intervention, 15 men from the HIRT and 16 men from the CG were included in the MRI analysis. In summary, no positive effects on the fat infiltration of the erector spinae and psoas major muscles were observed. CONCLUSIONS The previously reported positive effects on lumbar spine bone mineral density (BMD) suggest that mechanotransduction induces tropic effects on bone, but that fat infiltration of the erector spinae and psoas major muscles are either irreversible or, for some unknown reason, resistant to exercise. Because of the beneficial effects on spinal BMD, HIRT is still recommended in osteosarcopenic older men, but further research is needed to confirm appropriate age-specific training exercises for the paraspinal muscles. The potential of different MRI sequences to quantify degenerative and metabolic changes in various muscle groups must be better characterized. TRIAL REGISTRATIONS FrOST was approved by the University Ethics Committee of the Friedrich-Alexander University of Erlangen-Nürnberg (number 67_15b and 4464b) and the Federal Office for Radiation Projection (BfS, number Z 5-2,246,212 - 2017-002). Furthermore, it fully complies with the Declaration of Helsinki and is registered at ClinicalTrials.gov: NCT03453463 (05/03/2018). JAMA 310:2191-2194, 2013.
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Affiliation(s)
- Kaja Kircher
- Institute of Medical Physics, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Henkestr. 91, 91052, Erlangen, Germany.
- Department of Medicine III, Friedrich-Alexander University of Erlangen-Nürnberg, University Hospital Erlangen, Ulmenweg 18, 91054, Erlangen, Germany.
- Institute of Radiology, Friedrich-Alexander-University of Erlangen-Nürnberg and University Hospital Erlangen, Maximiliansplatz 3, 91054, Erlangen, Germany.
| | - Oliver Chaudry
- Department of Medicine III, Friedrich-Alexander University of Erlangen-Nürnberg, University Hospital Erlangen, Ulmenweg 18, 91054, Erlangen, Germany
| | - Armin M Nagel
- Institute of Radiology, Friedrich-Alexander-University of Erlangen-Nürnberg and University Hospital Erlangen, Maximiliansplatz 3, 91054, Erlangen, Germany
| | - Mansour Ghasemikaram
- Institute of Medical Physics, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Henkestr. 91, 91052, Erlangen, Germany
| | - Michael Uder
- Institute of Radiology, Friedrich-Alexander-University of Erlangen-Nürnberg and University Hospital Erlangen, Maximiliansplatz 3, 91054, Erlangen, Germany
| | - Franz Jakob
- Bernhard-Heine-Center for Locomotion Research, University of Würzburg, Brettreichstrasse 11, 97074, Würzburg, Germany
| | - Matthias Kohl
- Faculty Medical and Life Sciences, University of Furtwangen, Neckarstrasse 1, 78054, Villingen-Schwenningen, Germany
| | - Wolfgang Kemmler
- Institute of Medical Physics, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Henkestr. 91, 91052, Erlangen, Germany
- Institute of Radiology, Friedrich-Alexander-University of Erlangen-Nürnberg and University Hospital Erlangen, Maximiliansplatz 3, 91054, Erlangen, Germany
| | - Klaus Engelke
- Institute of Medical Physics, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Henkestr. 91, 91052, Erlangen, Germany
- Department of Medicine III, Friedrich-Alexander University of Erlangen-Nürnberg, University Hospital Erlangen, Ulmenweg 18, 91054, Erlangen, Germany
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Kaneva AM, Bojko ER. Fatty liver index (FLI): more than a marker of hepatic steatosis. J Physiol Biochem 2024; 80:11-26. [PMID: 37875710 DOI: 10.1007/s13105-023-00991-z] [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: 07/21/2023] [Accepted: 10/12/2023] [Indexed: 10/26/2023]
Abstract
Fatty liver index (FLI) was developed as a simple and accurate marker of hepatic steatosis. FLI is derived from an algorithm based on body mass index, waist circumference, and levels of triglycerides and gamma-glutamyltransferase, and it is widely used in clinical and epidemiological studies as a screening tool for discriminating between healthy and nonalcoholic fatty liver disease (NAFLD) subjects. However, a systematic review of the literature regarding FLI revealed that this index has more extensive relationships with biochemical and physiological parameters. FLI is associated with key parameters of lipid, protein and carbohydrate metabolism, hormones, vitamins and markers of inflammation, or oxidative stress. FLI can be a predictor or risk factor for a number of metabolic and nonmetabolic diseases and mortality. FLI is also used as an indicator for determining the effects of health-related prevention interventions, medications, and toxic substances on humans. Although in most cases, the exact mechanisms underlying these associations have not been fully elucidated, they are most often assumed to be mediated by insulin resistance, inflammation, and oxidative stress. Thus, FLI may be a promising marker of metabolic health due to its multiple associations with parameters of physiological and pathological processes. In this context, the present review summarizes the data from currently available literature on the associations between FLI and biochemical variables and physiological functions. We believe that this review will be of interest to researchers working in this area and can provide new perspectives and directions for future studies on FLI.
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Affiliation(s)
- Anastasiya M Kaneva
- Institute of Physiology of Кomi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, 50 Pervomayskaya str., 167982, Syktyvkar, Russia.
| | - Evgeny R Bojko
- Institute of Physiology of Кomi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, 50 Pervomayskaya str., 167982, Syktyvkar, Russia
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Pasco JA, Berk M, Penninx B, Hyde NK, Holloway-Kew KL, West EC, Kotowicz MA, Anderson KB, O’Neil A, Rufus-Membere PG, Williams LJ. Obesity and sarcopenic obesity characterized by low-grade inflammation are associated with increased risk for major depression in women. Front Nutr 2023; 10:1222019. [PMID: 37841401 PMCID: PMC10568313 DOI: 10.3389/fnut.2023.1222019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 09/04/2023] [Indexed: 10/17/2023] Open
Abstract
Background We aimed to determine women's risk of major depressive disorder (MDD) in relation to obesity phenotypes characterized by levels of circulating high-sensitivity C-reactive protein (hsCRP). Methods This population-based retrospective cohort study comprised 808 women (ages 20-84 y) recruited 1994-1997 and followed for a median 16.1 y (IQR 11.9-16.8). At baseline, body fat and lean tissue mass were measured by whole body dual-energy x-ray absorptiometry (DXA). Obesity was identified as high fat mass index (>12.9 kg/m2), body fat percentage (≥35%) and body mass index (≥30 kg/m2); sarcopenic obesity referred to a high ratio fat mass/fat-free mass (≥0.80). Systemic inflammation was operationalized as serum hsCRP concentration in the upper tertile (>2.99 mg/L). Obesity phenotypes were: non-obese + lowCRP, non-obese + highCRP, obese + lowCRP, and obese + highCRP. During follow-up, the Structured Clinical Interview for DSM-IV-TR (SCID-I/NP) was used to identify lifetime history of MDD and age of onset. Poisson regression models were used to estimate the MDD rate for each obesity phenotype during follow-up. Demographic, health and lifestyle factors were tested as potential confounders. Results During 11,869 p-y of follow-up, 161 (19.9%) women experienced an MDD episode. For obesity phenotypes based on fat mass index, models adjusted for baseline age and prior MDD, and non-obese + lowCRP as reference, RR for non-obese + highCRP was 1.21 (95% CI 0.80, 1.82), obese + lowCRP 1.46 (0.86, 2.47) and obese + highCRP 1.56 (1.03, 2.37). Patterns were similar for obesity by body fat percentage, body mass index and sarcopenic obesity. Conclusion Consistently across different obesity definitions, this longitudinal study reports that women with both obesity and systemic inflammation are at increased risk of subsequent MDD. Future research should examine whether tackling this metabolically unhealthy obesity type - through, for example, lifestyle or medication approaches - can reduce depression risk.
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Affiliation(s)
- Julie A. Pasco
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
- Department of Medicine–Western Health, The University of Melbourne, St. Albans, VIC, Australia
- Department of Preventive Medicine, Monash University, Melbourne, VIC, Australia
| | - Michael Berk
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
- The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
- Orygen, The National Centre of Excellence in Youth Mental Health, Parkville, VIC, Australia
| | - Brenda Penninx
- Department of Psychiatry, Amsterdam Neuroscience and Amsterdam Public Health Research Institute, VU University Medical Centre, Amsterdam, Netherlands
| | - Natalie K. Hyde
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
| | - Kara L. Holloway-Kew
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
| | - Emma C. West
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
| | - Mark A. Kotowicz
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
- Department of Medicine–Western Health, The University of Melbourne, St. Albans, VIC, Australia
| | - Kara B. Anderson
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
| | - Adrienne O’Neil
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
| | - Pamela G. Rufus-Membere
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
| | - Lana J. Williams
- Deakin University, IMPACT – Institute for Mental and Physical Health and Clinical Translation, Barwon Health, Geelong, VIC, Australia
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Musio A, Perazza F, Leoni L, Stefanini B, Dajti E, Menozzi R, Petroni ML, Colecchia A, Ravaioli F. Osteosarcopenia in NAFLD/MAFLD: An Underappreciated Clinical Problem in Chronic Liver Disease. Int J Mol Sci 2023; 24:ijms24087517. [PMID: 37108675 PMCID: PMC10139188 DOI: 10.3390/ijms24087517] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/07/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Chronic liver disease (CLD), including non-alcoholic fatty liver disease (NAFLD) and its advanced form, non-alcoholic steatohepatitis (NASH), affects a significant portion of the population worldwide. NAFLD is characterised by fat accumulation in the liver, while NASH is associated with inflammation and liver damage. Osteosarcopenia, which combines muscle and bone mass loss, is an emerging clinical problem in chronic liver disease that is often underappreciated. The reductions in muscle and bone mass share several common pathophysiological pathways; insulin resistance and chronic systemic inflammation are the most crucial predisposing factors and are related to the presence and gravity of NAFLD and to the worsening of the outcome of liver disease. This article explores the relationship between osteosarcopenia and NAFLD/MAFLD, focusing on the diagnosis, prevention and treatment of this condition in patients with CLD.
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Affiliation(s)
- Alessandra Musio
- Department of Medical and Surgical Sciences, IRCCS-Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Federica Perazza
- Department of Medical and Surgical Sciences, IRCCS-Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Laura Leoni
- Department of Medical and Surgical Sciences, IRCCS-Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
- Division of Metabolic Diseases and Clinical Nutrition, Department of Specialistic Medicines, University Hospital of Modena and Reggio Emilia, Largo del Pozzo 71, 41125 Modena, Italy
| | - Bernardo Stefanini
- Department of Medical and Surgical Sciences, IRCCS-Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Elton Dajti
- Department of Medical and Surgical Sciences, IRCCS-Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Renata Menozzi
- Division of Metabolic Diseases and Clinical Nutrition, Department of Specialistic Medicines, University Hospital of Modena and Reggio Emilia, Largo del Pozzo 71, 41125 Modena, Italy
| | - Maria Letizia Petroni
- Department of Medical and Surgical Sciences, IRCCS-Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Antonio Colecchia
- Gastroenterology Unit, Department of Medical Specialties, University Hospital of Modena, University of Modena & Reggio Emilia, 41121 Modena, Italy
| | - Federico Ravaioli
- Department of Medical and Surgical Sciences, IRCCS-Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
- Gastroenterology Unit, Department of Medical Specialties, University Hospital of Modena, University of Modena & Reggio Emilia, 41121 Modena, Italy
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Frigerio F, De Marinis M, Camardella F, Cantisani V, Pinto A, Bernardi M, Lubrano C, Gnessi L, Federici M, Donini LM, Poggiogalle E. Dynapenia, Muscle Quality, and Hepatic Steatosis in Patients with Obesity and Sarcopenic Obesity. Biomedicines 2023; 11:biomedicines11020472. [PMID: 36831008 PMCID: PMC9953547 DOI: 10.3390/biomedicines11020472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/09/2023] Open
Abstract
Accumulating evidence supports a connection between sarcopenic obesity (SO) and NAFLD. The extent to which fatty liver contributes to impaired muscle contractility is not yet well established. The aim of our study was to investigate the effect of NAFLD on dynapenia in patients with SO. In this study, 71 non-diabetic subjects (age 55 (7.8) years, BMI 35.2 kg/m2 (32.6-38.8)) were classified as having SO and non-sarcopenic obesity (NSO). SO patients displayed worse serum lipid profiles, higher body fat, and lower skeletal muscle mass (both total and appendicular) than NSO patients, despite the absence of any significant differences in body weight, glycometabolic parameters, and hepatic steatosis prevalence. A positive correlation between disposition index and muscle quality index (MQI) (r = 0.393, p = 0.013) emerged after controlling for menopause and body fat percentage. Based on multiple linear regression analysis, MQI was significantly positively associated with the disposition index (β: 0.059, SE: 0.002, p = 0.006) after adjustment for menopause, body fat percentage, and the presence of hepatic steatosis according to the hepatorenal index (HRI). Similar findings emerged when including liver enzyme levels in place of hepatic steatosis. Muscle quality was positively associated with β-cell function corrected for insulin resistance among patients with obesity and sarcopenic obesity, irrespective of the presence of fatty liver disease.
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Affiliation(s)
- Francesco Frigerio
- Department of Experimental Medicine, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Maria De Marinis
- Department of Experimental Medicine, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Francesca Camardella
- Department of Experimental Medicine, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Vito Cantisani
- Department of Radiological, Oncological and Pathobiological Sciences, Sapienza University of Rome, 00144 Rome, Italy
| | - Alessandro Pinto
- Department of Experimental Medicine, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Marco Bernardi
- Department of Clinical, Internal Medicine, Anesthesiology and Cardiovascular Sciences, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Carla Lubrano
- Department of Experimental Medicine, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Lucio Gnessi
- Department of Experimental Medicine, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Massimo Federici
- Department of Systems Medicine, University of Rome Tor Vergata, Center for Atherosclerosis, Policlinico Tor Vergata, Via Montpellier, 1, 00133 Rome, Italy
| | - Lorenzo Maria Donini
- Department of Experimental Medicine, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Eleonora Poggiogalle
- Department of Experimental Medicine, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy
- Correspondence:
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Freer CL, George ES, Tan SY, Abbott G, Dunstan DW, Daly RM. Effect of progressive resistance training with weight loss compared with weight loss alone on the fatty liver index in older adults with type 2 diabetes: secondary analysis of a 12-month randomized controlled trial. BMJ Open Diabetes Res Care 2022; 10:e002950. [PMID: 36220197 PMCID: PMC9557256 DOI: 10.1136/bmjdrc-2022-002950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 08/31/2022] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Non-alcoholic fatty liver disease (NAFLD) is highly prevalent (~75%) in people with type 2 diabetes (T2D). Since exercise and weight loss (WL) are recommended for the management of both NAFLD and T2D, this study examined whether progressive resistance training (PRT) plus WL could lead to greater improvements in the fatty liver index (FLI), an indicator of NAFLD, compared with WL alone in older adults with T2D. RESEARCH DESIGN AND METHODS This study represents a secondary analysis of a 12-month, two-arm randomised controlled trial including 36 overweight and obese adults (60-80 years) with T2D randomly allocated to supervised PRT plus WL (hypocaloric diet) (n=19) or WL plus sham (stretching) (n=17) for 6 months (phase I), followed by 6-months home-based training with ad libitum diet (phase II). FLI, which is an algorithm based on waist circumference, body mass index, triglycerides and gamma-glutamyl transferase, was assessed at baseline and every 3 months. Linear mixed models were used to analyse between-group differences over time, adjusting for baseline values. RESULTS At baseline, the mean±SD FLI was 76.6±18.5 and the likelihood of NAFLD (FLI >60) in all participants was 86%. Following phase I, both groups had similar statistically significant improvements in FLI (mean change (95% CI): PRT+WL, -12 (-20 to -4); WL, -9 (-15 to -4)), with no significant between-group difference. After the subsequent 6-month home-based phase, the improvements in FLI tended to persist in both groups (PRT+WL, -7 (-11 to -2); WL, -4 (-10 to 1)), with no between-group differences. CONCLUSIONS In older overweight adults with T2D, PRT did not enhance the benefits of WL on FLI, a predictor of NAFLD. TRIAL REGISTRATION NUMBER ACTRN12622000640707.
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Affiliation(s)
- Christine L Freer
- Institute for Physical Activity and Nutrition, Deakin University Faculty of Health, Geelong, Victoria, Australia
| | - Elena S George
- Institute for Physical Activity and Nutrition, Deakin University Faculty of Health, Geelong, Victoria, Australia
| | - Sze-Yen Tan
- Institute for Physical Activity and Nutrition, Deakin University Faculty of Health, Geelong, Victoria, Australia
| | - Gavin Abbott
- Institute for Physical Activity and Nutrition, Deakin University Faculty of Health, Geelong, Victoria, Australia
| | - David W Dunstan
- Institute for Physical Activity and Nutrition, Deakin University Faculty of Health, Geelong, Victoria, Australia
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Robin M Daly
- Institute for Physical Activity and Nutrition, Deakin University Faculty of Health, Geelong, Victoria, Australia
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Xiao P, Liang P, Gao P, Wu J. Sex- and region-specific associations of skeletal muscle mass with metabolic dysfunction-associated fatty liver disease. Front Endocrinol (Lausanne) 2022; 13:1057261. [PMID: 36531457 PMCID: PMC9755203 DOI: 10.3389/fendo.2022.1057261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 11/21/2022] [Indexed: 12/03/2022] Open
Abstract
INTRODUCTION Metabolic dysfunction-associated fatty liver disease (MAFLD) is known to be the most common chronic liver disease worldwide, and accumulating evidence suggests that skeletal muscle might play an important role in metabolic health. However, the association between skeletal muscle and MAFLD is poorly understood so far. Therefore, we aimed to evaluate the associations of skeletal muscle with MAFLD and significant fibrosis. METHODS A cross-sectional analysis was conducted using data obtained from the 2017-2018 US National Health and Nutrition Examination Survey. The whole-body, appendicular, and trunk skeletal muscle mass index (SMI) were assessed by dual-energy x-ray absorptiometry. MAFLD and significant fibrosis were assessed by transient elastography. Survey-weight adjusted multivariable logistic regressions were used to determine the associations. The area under the receiver operating characteristic curve (AUC) and variable importance scores from the random forest and logistic regression model were calculated to assess the predictive capability of variables and models. RESULTS Of the 2065 participants, those with appendicular SMI in the highest quartile were associated with a lower risk for MAFLD in both sexes (male, OR[95%CI]: 0.46 [0.25~0.84]; female, OR[95%CI]: 0.32 [0.13~0.82]), but with a significantly different scale of the associations between sexes (P interaction = 0.037). However, females with trunk SMI in the highest quartile had an increased risk of significant fibrosis (OR[95%CI]: 7.82 [1.86~32.77]). Trunk SMI and appendicular SMI ranked the third contributor to MAFLD in random forest and logistic regression models, respectively. Taking appendicular and trunk SMI into consideration, the AUCs for MAFLD were 0.890 and 0.866 in random forest and logistic regression models, respectively. DISCUSSION The distribution of skeletal muscle mass differently affects MAFLD and significant fibrosis in the sex groups. Higher appendicular skeletal muscle mass was associated with a lower risk of MAFLD, while the risk of significant fibrosis in females was increased with the trunk skeletal muscle mass.
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Affiliation(s)
- Pei Xiao
- Center for Non-Communicable Disease Management, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Pu Liang
- Beijing Key Laboratory of Emerging Infectious Diseases, Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Infectious Diseases, Beijing, China
- National Center for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
- *Correspondence: Pu Liang,
| | - Panjun Gao
- Department of Health, Ethics & Society, CAPHRI Care and Public Health Research Institute, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, Netherlands
| | - Jinyi Wu
- Department of Public Health, Wuhan Fourth Hospital, Wuhan, China
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