1
|
Pandey A, Patel KV, Segar MW, Ayers C, Linge J, Leinhard OD, Anker SD, Butler J, Verma S, Joshi PH, Neeland IJ. Effect of liraglutide on thigh muscle fat and muscle composition in adults with overweight or obesity: Results from a randomized clinical trial. J Cachexia Sarcopenia Muscle 2024. [PMID: 38561962 DOI: 10.1002/jcsm.13445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/28/2024] [Accepted: 02/11/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Excess muscle fat is observed in obesity and associated with greater burden of cardiovascular risk factors and higher risk of mortality. Liraglutide reduces total body weight and visceral fat but its effect on muscle fat and adverse muscle composition is unknown. METHODS This is a pre-specified secondary analysis of a randomized, double-blind, placebo-controlled trial that examined the effects of liraglutide plus a lifestyle intervention on visceral adipose tissue and ectopic fat among adults without diabetes with body mass index ≥30 kg/m2 or ≥27 kg/m2 and metabolic syndrome. Participants were randomly assigned to a once-daily subcutaneous injection of liraglutide (target dose 3.0 mg) or matching placebo for 40 weeks. Body fat distribution and muscle composition was assessed by magnetic resonance imaging at baseline and 40-week follow-up. Muscle composition was described by the combination of thigh muscle fat and muscle volume. Treatment difference (95% confidence intervals [CI]) was calculated by least-square means adjusted for baseline thigh muscle fat. The association between changes in thigh muscle fat and changes in body weight were assessed using Spearman correlation coefficients. The effect of liraglutide versus placebo on adverse muscle composition, denoted by high thigh muscle fat and low thigh muscle volume, was explored. RESULTS Among the 128 participants with follow-up imaging (92.2% women, 36.7% Black), median muscle fat at baseline was 7.8%. The mean percent change in thigh muscle fat over median follow-up of 36 weeks was -2.87% among participants randomized to liraglutide (n = 73) and 0.05% in the placebo group (absolute change: -0.23% vs. 0.01%). The estimated treatment difference adjusted for baseline thigh muscle fat was -0.24% (95% CI, -0.41 to -0.06, P-value 0.009). Longitudinal change in thigh muscle fat was significantly associated with change in body weight in the placebo group but not the liraglutide group. The proportion of participants with adverse muscle composition decreased from 11.0% to 8.2% over follow-up with liraglutide, but there was no change with placebo. CONCLUSIONS In a cohort of predominantly women with overweight or obesity in the absence of diabetes, once-daily subcutaneous liraglutide was associated with a reduction in thigh muscle fat and adverse muscle composition compared with placebo. The contribution of muscle fat improvement to the cardiometabolic benefits of liraglutide requires further study.
Collapse
Affiliation(s)
- Ambarish Pandey
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Kershaw V Patel
- Department of Cardiology, Houston Methodist DeBakey Heart & Vascular Center, Houston, TX, USA
| | - Matthew W Segar
- Department of Cardiology, Texas Heart Institute, Houston, TX, USA
| | - Colby Ayers
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jennifer Linge
- AMRA Medical and Linköping University, Linköping, Sweden
- Department of Health, Medicine and Caring Sciences, Division of Diagnostics and Specialist Medicine, Linköping University, Linköping, Sweden
| | - Olof D Leinhard
- AMRA Medical and Linköping University, Linköping, Sweden
- Department of Health, Medicine and Caring Sciences, Division of Diagnostics and Specialist Medicine, Linköping University, Linköping, Sweden
| | - Stefan D Anker
- Department of Cardiology (CVK), Berlin Institute of Health Center for Regenerative Therapies (BCRT), and German Centre for Cardiovascular Research (DZHK) Partner Site Berlin, Charité Universitätsmedizin, Berlin, Germany
| | - Javed Butler
- Baylor Heart and Vascular Institute, Baylor University Medical Center, Dallas, TX, USA
- Department of Medicine, University of Mississippi School of Medicine, Jackson, MS, USA
| | - Subodh Verma
- St. Michael's Hospital, University of Toronto, Toronto, ON, Canada
| | - Parag H Joshi
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ian J Neeland
- Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center and Case Western Reserve University School of Medicine, Cleveland, OH, USA
| |
Collapse
|
2
|
Yu X, Huang YH, Feng YZ, Cheng ZY, Wang CC, Cai XR. Association of Muscle Fat Content and Muscle Mass With Impaired Lung Function in Young Adults With Obesity: Evaluation With MRI. Acad Radiol 2024; 31:9-18. [PMID: 36966071 DOI: 10.1016/j.acra.2023.02.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/18/2023] [Accepted: 02/26/2023] [Indexed: 03/27/2023]
Abstract
RATIONALE AND OBJECTIVES Although low muscle mass is associated with decreased lung function, studies exploring the relationship between muscle fat content and lung function impairment are scarce. This study aimed to evaluate the association of muscle mass and fatty infiltration with lung function in young adults with obesity. MATERIALS AND METHODS We performed a retrospective cross-sectional study of patients aged 18-45 years with obesity who had impaired pulmonary function (case group, n = 66) and those with normal pulmonary function (control group, n = 198) by matching age, sex, body mass index (BMI), and height to assess whether muscle characteristics differed. Muscle mass and muscle fat content were assessed by MRI using a chemical shift-encoded sequence (IDEAL-IQ). RESULTS A total of 264 patients were enrolled (124 females; mean age 32.0 years). The case group had lower muscle mass than the control group (p = 0.012), and there was an association between low muscle mass and lung function impairment (odds ratio (OR), 3.74; 95% confidence interval (CI), 1.57-8.93). Furthermore, muscle fat content was significantly higher in cases compared to controls (7.4 (2.7) % vs. 6.2 (2.5) %, p = 0.001). Multiple logistic regression analysis showed that muscle fat content was associated with a higher risk of impaired lung function (OR, 2.10; 95% CI, 1.65-2.66), regardless of adiposity and muscle mass. CONCLUSION Both muscle fat content and muscle mass are associated with impaired lung function in young adults with obesity.
Collapse
Affiliation(s)
- Xin Yu
- Medical Imaging Center, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yan-Hao Huang
- Medical Imaging Center, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - You-Zhen Feng
- Medical Imaging Center, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Zhong-Yuan Cheng
- Medical Imaging Center, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Cun-Chuan Wang
- Department of General Surgery, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Xiang-Ran Cai
- Medical Imaging Center, First Affiliated Hospital of Jinan University, Guangzhou, China.
| |
Collapse
|
3
|
Heidari B, Ahmad A, Al-Hijji MA, Aoun J, Singh M, Moynagh MR, Takahashi N, Lerman LO, Alkhouli MA, Lerman A. Muscle fat index is associated with frailty and length of hospital stay following transcatheter aortic valve replacement in high-risk patients. Int J Cardiol 2021; 348:33-38. [PMID: 34871623 DOI: 10.1016/j.ijcard.2021.11.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 10/29/2021] [Accepted: 11/29/2021] [Indexed: 11/05/2022]
Abstract
BACKGROUND Aging is associated with progressive loss of muscle mass, as well as replacement of muscle with fat and fibrous tissue. We studied the contribution of muscle fat content, a surrogate marker of biological aging, to frailty and Length of Hospital Stay (LOS) following Transcatheter Aortic Valve Replacement (TAVR). METHODS We evaluated 415 patients who underwent TAVR from February 2012 to December 2016 at Mayo Clinic, MN, USA. Densities between -190 to -30 Hounsfield Units within the abdominal muscle area were determined as muscle fat. Muscle Fat Index (MFI) was defined as muscle fat mass divided by height squared. LOS was considered as the primary outcome. Stepwise multivariable linear regression was used to identify the predictors of LOS. RESULTS Mean age ± SD of the study population was 81.2 ± 9.6 years and 58.07% were male. Seventy-two patients (17.35%) had frailty. Median (IQR) LOS was 4 (3-6) days. MFI was higher in patients with frailty (median (IQR); 18.1 [13.8-24.2] vs 14.4 [10.6-18.7], p < 0.001) and was positively correlated with LOS (r = 0.129, p = 0.009). In multivariable analysis of predictors of LOS, MFI (β = 0.06, p = 0.022), pre-TAVR atrial fibrillation/flutter (β = 0.5, p = 0.015), and post-TAVR complications (β = 0.91, p < 0.001) were directly, and femoral access route (β = -1.13, p < 0.001) and pre-TAVR hemoglobin (β = -0.35, p = 0.002) were inversely associated with LOS. CONCLUSIONS MFI can be determined from pre-TAVR CT scans and is a novel predictor of LOS following TAVR. This objective indicator can potentially be used in a pre-TAVR clinic to plan for rehabilitation programs in selected patients.
Collapse
Affiliation(s)
- Behnam Heidari
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States of America
| | - Ali Ahmad
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States of America
| | - Mohammed A Al-Hijji
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States of America; Department of Cardiovascular Medicine, Heart Hospital, Hamad Medical Cooperation, Doha, Qatar
| | - Joe Aoun
- Department of Cardiovascular Medicine, DeBakey Heart and Vascular Center, Houston Methodist Hospital, Houston, TX, United States of America
| | - Mandeep Singh
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States of America
| | - Michael R Moynagh
- Department of Radiology, Mayo Clinic, Rochester, MN, United States of America
| | - Naoki Takahashi
- Department of Radiology, Mayo Clinic, Rochester, MN, United States of America
| | - Lilach O Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, United States of America
| | - Mohamad A Alkhouli
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States of America
| | - Amir Lerman
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States of America.
| |
Collapse
|
4
|
Nachit M, Lanthier N, Rodriguez J, Neyrinck AM, Cani PD, Bindels LB, Hiel S, Pachikian BD, Trefois P, Thissen JP, Delzenne NM. A dynamic association between myosteatosis and liver stiffness: Results from a prospective interventional study in obese patients. JHEP Rep 2021; 3:100323. [PMID: 34355155 PMCID: PMC8321935 DOI: 10.1016/j.jhepr.2021.100323] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 05/14/2021] [Accepted: 05/24/2021] [Indexed: 12/12/2022] Open
Abstract
Background & Aims Retrospective cross-sectional studies linked sarcopenia and myosteatosis with metabolic dysfunction-associated fatty liver disease (MAFLD). Here, we wanted to clarify the dynamic relationship between sarcopenia, myosteatosis, and MAFLD. Methods A cohort of 48 obese patients was randomised for a dietary intervention consisting of 16 g/day of inulin (prebiotic) or maltodextrin (placebo) supplementation. Before and after the intervention, we evaluated liver steatosis and stiffness with transient elastography (TE); we assessed skeletal muscle index (SMI) and skeletal muscle fat index (SMFI) (a surrogate for absolute fat content in muscle) using computed tomography (CT) and bioelectrical impedance analysis (BIA). Results At baseline, sarcopenia was uncommon in patients with MAFLD (4/48, 8.3%). SMFI was higher in patients with high liver stiffness than in those with low liver stiffness (640.6 ± 114.3 cm2/ Hounsfield unit [HU] vs. 507.9 ± 103.0 cm2/HU, p = 0.001). In multivariate analysis, SMFI was robustly associated with liver stiffness even when adjusted for multiple confounders (binary logistic regression, p <0.05). After intervention, patients with inulin supplementation lost weight, but this was not associated with a decrease in liver stiffness. Remarkably, upon intervention (being inulin or maltodextrin), patients who lowered their SMFI, but not those who increased SMI, had a 12.7% decrease in liver stiffness (before = 6.36 ± 2.15 vs. after = 5.55 ± 1.97 kPa, p = 0.04). Conclusions Myosteatosis, but not sarcopenia, is strongly and independently associated with liver stiffness in obese patients with MAFLD. After intervention, patients in which the degree of myosteatosis decreased reduced their liver stiffness, irrespective of body weight loss or prebiotic treatment. The potential contribution of myosteatosis to liver disease progression should be investigated. Clinical Trials registration number NCT03852069. Lay summary The fat content in skeletal muscles (or myosteatosis) is strongly associated with liver stiffness in obese patients with MAFLD. After a dietary intervention, patients in which the degree of myosteatosis decreased also reduced their liver stiffness. The potential contribution of myosteatosis to liver disease progression should be investigated. Low-radiation CT scan enables muscle evaluation (quantity and composition). Muscle mass is not low in patients with MAFLD and high liver stiffness. In contrast, myosteatosis is strongly associated with liver stiffness. Lower myosteatosis after dietary intervention is associated with improved MAFLD.
Collapse
Key Words
- ALM, appendicular lean mass
- ALT, alanine aminotransferase
- AST, aspartate aminotransferase
- BIA, bioelectrical impedance analysis
- BMI, body mass index
- CAP, controlled attenuation parameter
- CT scan
- CT, computed tomography
- CTDIvol, volume CT dose index
- DEXA, dual-energy X-ray absorptiometry
- DLP, dose–length product
- FFM, fat-free mass
- HT, hypertension
- HU, Hounsfield unit
- HbA1c, haemoglobin A1c
- ITF, inulin-type fructans
- L3, third lumbar level
- Liver
- M0, baseline
- M3, end of the 3-month intervention
- MAFL, metabolic associated fatty liver
- MAFLD, metabolic dysfunction-associated fatty liver disease
- MRI, magnetic resonance imaging
- Muscle fat
- Myosteatosis
- NASH, non-alcoholic steatohepatitis
- PMI, psoas muscle index
- SMD, skeletal muscle density
- SMDpsoas, psoas muscle density
- SMFI, skeletal muscle fat index
- SMFIpsoas, psoas fat index
- SMI, skeletal muscle index
- SMIbw, SMI scaled on body weight
- SMIht2, SMI scaled on height squared
- Sarcopenia
- TE, transient elastography
- γGT, γ-glutamyl transferase
Collapse
Affiliation(s)
- Maxime Nachit
- Laboratory of Hepato-Gastroenterology, Institut de Recherche Expérimentale et Clinique, UCLouvain, Université catholique de Louvain, Brussels, Belgium.,Department of Imaging and Pathology, KU Leuven, Leuven, Belgium
| | - Nicolas Lanthier
- Laboratory of Hepato-Gastroenterology, Institut de Recherche Expérimentale et Clinique, UCLouvain, Université catholique de Louvain, Brussels, Belgium.,Service d'Hépato-Gastroentérologie, Cliniques universitaires Saint-Luc, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Julie Rodriguez
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Audrey M Neyrinck
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Patrice D Cani
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium.,WELBIO - Walloon Excellence in Life Sciences and BIOtechnology, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Laure B Bindels
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Sophie Hiel
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Barbara D Pachikian
- Centre d'Investigation Clinique en Nutrition, UCLouvain, Université catholique de Louvain, Louvain-La-Neuve, Belgium
| | - Pierre Trefois
- Medical Imaging Department, Cliniques universitaires St-Luc, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Jean-Paul Thissen
- Pole of Endocrinology, Diabetes and Nutrition, Institut de Recherche Expérimentale et Clinique, UCLouvain, Université catholique de Louvain, Brussels, Belgium.,Service d'Endocrinologie, diabétologie et nutrition, Cliniques universitaires Saint-Luc, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Nathalie M Delzenne
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| |
Collapse
|
5
|
Nachit M, De Rudder M, Thissen JP, Schakman O, Bouzin C, Horsmans Y, Vande Velde G, Leclercq IA. Myosteatosis rather than sarcopenia associates with non-alcoholic steatohepatitis in non-alcoholic fatty liver disease preclinical models. J Cachexia Sarcopenia Muscle 2021; 12:144-158. [PMID: 33244884 PMCID: PMC7890270 DOI: 10.1002/jcsm.12646] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 09/29/2020] [Accepted: 10/12/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Non-alcoholic fatty liver (NAFL) disease (NAFLD) is the most common chronic liver disease in the world. While most subjects have 'inert' NAFL, a subset will progress to non-alcoholic steatohepatitis (NASH) and its life-threatening complications. A substantial body of literature supports that a low muscle mass, low strength, and/or muscle fatty infiltration (myosteatosis) are associated with NAFLD severity. Here, we evaluated the muscle compartment in NASH preclinical models to decipher the kinetics of muscle alterations in relation with liver disease progression. METHODS We developed and validated a micro-computed tomography-based methodology to prospectively study skeletal muscle mass and density in muscle and liver (i.e. reflecting fatty infiltration) in a high-throughput and non-invasive manner in three preclinical NAFLD/NASH rodent models: fat aussie (FOZ) mice fed a high-fat diet (FOZ HF), wild-type (WT) mice fed a high-fat high-fructose diet (WT HFF), and WT mice fed a high-fat diet (WT HF). We compared them with WT mice fed a normal diet (WT ND) used as controls. RESULTS -FOZ HF with fibrosing NASH had sarcopenia characterized by a reduced muscle strength when compared with WT HF and WT HFF with early NASH and WT ND controls (165.2 ± 5.2 g vs. 237.4 ± 11.7 g, 256 ± 5.7 g, and 242.9 ± 9.3 g, respectively, P 60; 0.001). Muscle mass or strength was not lower in FOZ HF, WT HF, and WT HFF with early NASH than in controls. Myosteatosis was present in FOZ HF with fibrosing NASH, but also in FOZ HF, WT HF, and WT HFF with early NASH (muscle density = 0.50 ± 0.02, 0.62 ± 0.02, 0.70 ± 0.05, and 0.75 ± 0.03, respectively, with P 60; 0.001 when compared with respective controls). Myosteatosis degree was strongly correlated with NAFLD activity score (r = -0.87, n = 67, P 60; 0.001). In multivariate analysis, the association between myosteatosis and NASH was independent from homeostatic model assessment of insulin resistance and visceral fat area (P 60; 0.05). Myosteatosis degree powerfully discriminated NASH from benign NAFL and normal liver (area under the receiver operating characteristic = 0.96, n = 67, P 60; 0.001). CONCLUSIONS Taken together, our data support that there is no sarcopenia in obese mice with early NASH. In contrast, the severity of myosteatosis reflects on hepatocellular damage and inflammation during early NASH development. This observation prompts us to exploit myosteatosis as a novel non-invasive marker of NASH.
Collapse
Affiliation(s)
- Maxime Nachit
- Laboratory of Hepato-Gastroenterology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium.,Department of Imaging and Pathology, KU Leuven, Leuven, Belgium
| | - Maxime De Rudder
- Laboratory of Hepato-Gastroenterology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Jean-Paul Thissen
- Pole of Endocrinology, Diabetes and Nutrition, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | | | | | - Yves Horsmans
- Service d'Hépato-Gastro-Entérologie, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Greetje Vande Velde
- Department of Imaging and Pathology, KU Leuven, Leuven, Belgium.,Molecular Small Animal Imaging Center (MoSAIC), KU Leuven, Leuven, Belgium
| | - Isabelle Anne Leclercq
- Laboratory of Hepato-Gastroenterology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| |
Collapse
|
6
|
Pedroso MG, de Almeida AC, Aily JB, de Noronha M, Mattiello SM. Fatty infiltration in the thigh muscles in knee osteoarthritis: a systematic review and meta-analysis. Rheumatol Int 2019; 39:627-635. [PMID: 30852623 DOI: 10.1007/s00296-019-04271-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 03/02/2019] [Indexed: 12/23/2022]
Abstract
Knee osteoarthritis is a chronic degenerative joint disease, influenced by inflammatory, mechanical and metabolic processes. Current literature shows that thigh muscles of people with knee osteoarthritis can have increased infiltration of fat, both between and within the muscles (inter- and intramuscular fat). The fatty infiltration in the thigh in this population is correlated to systemic inflammation, poor physical function, and muscle impairment and leads to metabolic impairments and muscle disfunction. The objective of this study is to systematically review the literature comparing the amount of fatty infiltration between people with knee osteoarthritis and healthy controls. A literature search on the databases MEDLINE, Embase, CINAHL SPORTDiscuss, Web of Science and Scopus from insertion to December 2018, resulted in 1035 articles, from which 7 met inclusion/exclusion criteria and were included in the review. All included studies analyzed the difference in intermuscular fat and only one study analyzed intramuscular fat. A meta-analysis (random effects model) transforming data into standardized mean difference was performed for intermuscular fat (six studies). The meta-analysis showed a standardized mean difference of 0.39 (95% confidence interval from 0.25 to 0.53), showing that people with knee osteoarthritis have more intermuscular fat than healthy controls. The single study analyzing intramuscular fat shows that people with knee osteoarthritis have more intramuscular fat fraction than healthy controls. People with knee osteoarthritis have more fatty infiltration around the thigh than people with no knee osteoarthritis. That conclusion is stronger for intermuscular fat than intramuscular fat, based on the quality and number of studies analyzed.
Collapse
Affiliation(s)
- Maria Gabriela Pedroso
- Department of Physical Therapy, Center of Biological and Health Sciences, Federal University of São Carlos, Washington Luiz Road, km 235, SP-310, Mailbox: 676, São Carlos, São Paulo, 13565-905, Brazil.
| | - Aline Castilho de Almeida
- Department of Physical Therapy, Center of Biological and Health Sciences, Federal University of São Carlos, Washington Luiz Road, km 235, SP-310, Mailbox: 676, São Carlos, São Paulo, 13565-905, Brazil
| | - Jéssica Bianca Aily
- Department of Physical Therapy, Center of Biological and Health Sciences, Federal University of São Carlos, Washington Luiz Road, km 235, SP-310, Mailbox: 676, São Carlos, São Paulo, 13565-905, Brazil
| | - Marcos de Noronha
- Community and Allied Health Department, Rural Health School, La Trobe University, Bendigo, VIC, 3660, Australia
| | - Stela Marcia Mattiello
- Department of Physical Therapy, Center of Biological and Health Sciences, Federal University of São Carlos, Washington Luiz Road, km 235, SP-310, Mailbox: 676, São Carlos, São Paulo, 13565-905, Brazil
| |
Collapse
|
7
|
Abbott R, Peolsson A, West J, Elliott JM, Åslund U, Karlsson A, Leinhard OD. The qualitative grading of muscle fat infiltration in whiplash using fat and water magnetic resonance imaging. Spine J 2018; 18:717-725. [PMID: 28887274 PMCID: PMC8845185 DOI: 10.1016/j.spinee.2017.08.233] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 06/30/2017] [Accepted: 08/09/2017] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT The development of muscle fat infiltration (MFI) in the neck muscles is associated with poor functional recovery following whiplash injury. Custom software and time-consuming manual segmentation of magnetic resonance imaging (MRI) is required for quantitative analysis and presents as a barrier for clinical translation. PURPOSE The purpose of this work was to establish a qualitative MRI measure for MFI and evaluate its ability to differentiate between individuals with severe whiplash-associated disorder (WAD), mild or moderate WAD, and healthy controls. STUDY DESIGN/SETTING This is a cross-sectional study. PATIENT SAMPLE Thirty-one subjects with WAD and 31 age- and sex-matched controls were recruited from an ongoing randomized controlled trial. OUTCOME MEASURES The cervical multifidus was visually identified and segmented into eighths in the axial fat/water images (C4-C7). Muscle fat infiltration was assessed on a visual scale: 0 for no or marginal MFI, 1 for light MFI, and 2 for distinct MFI. The participants with WAD were divided in two groups: mild or moderate and severe based on Neck Disability Index % scores. METHODS The mean regional MFI was compared between the healthy controls and each of the WAD groups using the Mann-Whitney U test. Receiver operator characteristic (ROC) analyses were carried out to evaluate the validity of the qualitative method. RESULTS Twenty (65%) patients had mild or moderate disability and 11 (35%) were considered severe. Inter- and intra-rater reliability was excellent when grading was averaged by level or when frequency of grade II was considered. Statistically significant differences (p<.05) in regional MFI were particularly notable between the severe WAD group and healthy controls. The ROC curve, based on detection of distinct MFI, showed an area-under-the curve of 0.768 (95% confidence interval 0.59-0.94) for discrimination of WAD participants. CONCLUSIONS These preliminary results suggest a qualitative MRI measure for MFI is reliable and valid, and may prove useful toward the classification of WAD in radiology practice.
Collapse
Affiliation(s)
- Rebecca Abbott
- Department of Physical Therapy and Human Movement Sciences, NU-PTHMS, Feinberg School of Medicine, Northwestern University, 645 North Michigan Ave, Suite 1100, Chicago, IL, 60611 USA
| | - Anneli Peolsson
- Department of Medical and Health Sciences, Physiotherapy, IMH kansli, Sandbacksgatan 7, 3 tr, Campus US, Linköping University, 58183 Linköping, Sweden
| | - Janne West
- Department of Medical and Health Sciences and Center for Medical Image Science and Visualization (CMIV)/ Division of Radiological Services, IMH, Linköping University, SE-581 85 Linköping, Sweden
| | - James M. Elliott
- Department of Physical Therapy and Human Movement Sciences, NU-PTHMS, Feinberg School of Medicine, Northwestern University, 645 North Michigan Ave, Suite 1100, Chicago, IL, 60611 USA,School of Health and Rehabilitation Sciences, The University of Queensland, Australia,Zurich University of Applied Sciences, Gertrudstrasse 15, 8400 Winterthur, Switzerland
| | - Ulrika Åslund
- Department of Medical and Health Sciences, Physiotherapy, IMH kansli, Sandbacksgatan 7, 3 tr, Campus US, Linköping University, 58183 Linköping, Sweden
| | - Anette Karlsson
- Center for Medical Image Science and Visualization (CMIV)/ Department of Biomedical Engineering, Linköping University, SE 58183 Linköping, Sweden
| | - Olof Dahlqvist Leinhard
- Department of Medical and Health Sciences, and Center for Medical Image Science and Visualization (CMIV)/Division of Radiological Sciences, IMH, Linköping University, SE-581 85 Linköping, Sweden.
| |
Collapse
|
8
|
Li J, Mihalcioiu M, Li L, Zakikhani M, Camirand A, Kremer R. Vitamin D prevents lipid accumulation in murine muscle through regulation of PPARγ and perilipin-2 expression. J Steroid Biochem Mol Biol 2018; 177:116-124. [PMID: 29037825 DOI: 10.1016/j.jsbmb.2017.10.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 10/01/2017] [Accepted: 10/10/2017] [Indexed: 02/06/2023]
Abstract
Vitamin D plays an important role in regulation of skeletal muscle tone and contraction. Serum vitamin D status is linked to muscle power and force in adolescent girls, and vitamin D deficiency is associated with myopathies in children and poorer physical performance in the elderly. We previously reported that vitamin D deficiency is linked to a significant increase in muscle fatty infiltration in healthy young women, and studies in patients with neuromuscular disorders also associate muscle weakening and lipid content. In order to better understand the link between vitamin D status and skeletal muscle lipid metabolism, we compared the effect of a low (25IU/kg) or normal (1000IU/kg) vitamin D3 diet on muscle fat in female FVB mice maintained in a room without UVB lighting to minimize endogenous vitamin D production. Animals on low vitamin D diet displayed lower circulating 25(OH)D levels and a dramatic increase (287±52% compared to normal diet, p<0.0001) in lipid deposition in skeletal muscle accompanied by muscle fiber disorganization. Lipid droplet staining increased by 242±23% (p<0.0001) in low vitamin D diet, and lipid droplet coat protein perilipin-2 and nuclear receptor transcription factor PPARγ expression levels were increased compared to mice fed the normal vitamin D diet: average staining for PLIN2: 0.22±0.08 (25IU/kg diet) vs 0.10±0.02 (1000IU/kg). Average staining for PPARγ: 0.24±0.06 (25IU/kg diet) vs 0.07±0.04 (1000IU/kg) p<0.0001. Tissue mass spectrometry imaging revealed major differences in muscle phospholipids profile depending on diet. In vitro, 1,25(OH)2D3 treatment of 3T3-L1 pre-adipocytes inhibited appearance of lipid droplets by 79±9.3%, and caused a 80±10% and 25±8% (p=0.001) reduction in PPARγ and perilipin-2 mRNA levels (by qPCR) compared to control cells. In summary, we report here the first in vivo model illustrating the important structural muscle fiber disorganization and fat accumulation inside and outside muscle fibers that accompany vitamin D deficiency. Furthermore, we show that the underlying mechanisms involve PPARγ and perilipin-2.
Collapse
Affiliation(s)
- Jiarong Li
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Milton Mihalcioiu
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Lifeng Li
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Mahvash Zakikhani
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Anne Camirand
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Richard Kremer
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| |
Collapse
|
9
|
Zappaterra M, Deserti M, Mazza R, Braglia S, Zambonelli P, Davoli R. A gene and protein expression study on four porcine genes related to intramuscular fat deposition. Meat Sci 2016; 121:27-32. [PMID: 27236338 DOI: 10.1016/j.meatsci.2016.05.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 04/27/2016] [Accepted: 05/06/2016] [Indexed: 11/21/2022]
Abstract
Intramuscular fat (IMF) content has a prominent role in meat quality, affecting sensory attributes such as flavour and texture. In the present research, we studied in samples of porcine Semimembranosus muscle four genes related to lipid metabolism and whose gene expressions have been associated to IMF deposition: FASN, SCD, LIPE and LPL. We analysed both mRNA and protein expressions in two groups of Italian Large White pigs divergent for Semimembranosus IMF deposition, with the aim of comparing the levels of four genes and enzymes between the two groups and identifying possible coexpression links. The obtained results suggest a prominent role of LIPE enzyme in IMF hydrolysis, as the samples with low IMF deposition show a significantly higher amount of this lipase. Finally, a poorly known correlation was found between LIPE and FASN enzymes only in female individuals. These results provide new information for the understanding of IMF deposition.
Collapse
|