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Yoshiko A, Shiozawa K, Niwa S, Takahashi H, Koike T, Watanabe K, Katayama K, Akima H. Association of skeletal muscle oxidative capacity with muscle function, sarcopenia-related exercise performance, and intramuscular adipose tissue in older adults. GeroScience 2024; 46:2715-2727. [PMID: 38153667 PMCID: PMC10828458 DOI: 10.1007/s11357-023-01043-6] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/10/2023] [Indexed: 12/29/2023] Open
Abstract
Muscle function and exercise performance measures, such as muscle endurance capacity, maximal strength, chair stand score, gait speed, and Timed Up and Go score, are evaluated to diagnose sarcopenia and frailty in older individuals. Furthermore, intramuscular adipose tissue (IntraMAT) content increases with age. Skeletal muscle oxidative capacity determines muscle metabolism and maintains muscle performance. This study aimed to investigate the association of skeletal muscle oxidative capacity with muscle function, exercise performance, and IntraMAT content in older individuals. Thirteen older men and women participated in this study. Skeletal muscle oxidative capacity was assessed by the recovery speed of muscle oxygen saturation after exercise using near-infrared spectroscopy from the medial gastrocnemius. We assessed two muscle functions, peak torque and time to task failure, and four sarcopenia-related exercise performances: handgrip strength, gait speed, 30-s chair stand, and Timed Up and Go. The IntraMAT content was measured using axial magnetic resonance imaging. The results showed a relationship between skeletal muscle oxidative capacity and gait speed but not with muscle functions and other exercise performance measures. Skeletal muscle oxidative capacity was not related to IntraMAT content. Skeletal muscle oxidative capacity, which may be indicative of the capacity of muscle energy production in the mitochondria, is related to locomotive functions but not to other functional parameters or skeletal fat infiltration.
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Affiliation(s)
- Akito Yoshiko
- Faculty of Liberal Arts and Sciences, Chukyo University, Toyota, Japan.
| | - Kana Shiozawa
- Department of Exercise and Sports Physiology, Graduate School of Medicine, Nagoya University, Nagoya, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| | - Shiori Niwa
- Department of Nursing, Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Hideyuki Takahashi
- Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan
| | - Teruhiko Koike
- Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan
- Department of Sports Medicine, Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Kohei Watanabe
- School of Health and Sport Sciences, Chukyo University, Toyota, Japan
| | - Keisho Katayama
- Department of Exercise and Sports Physiology, Graduate School of Medicine, Nagoya University, Nagoya, Japan
- Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan
| | - Hiroshi Akima
- Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan
- Graduate School of Education and Human Development, Nagoya University, Nagoya, Japan
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Isanejad M, Steffen LM, Terry JG, Shikany JM, Zhou X, So-YunYi, Jacobs DR, Carr JJ, Steffen BT. Diet quality is associated with adipose tissue and muscle mass: the Coronary Artery Risk Development in Young Adults (CARDIA) study. J Cachexia Sarcopenia Muscle 2024; 15:425-433. [PMID: 38086784 PMCID: PMC10834311 DOI: 10.1002/jcsm.13399] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 10/16/2023] [Accepted: 11/06/2023] [Indexed: 02/03/2024] Open
Abstract
BACKGROUND Aging is associated with changes in body composition, and preventing loss of muscle mass and accumulation of excess adipose tissue in middle-aged adults may reduce age-related conditions at older ages. Dietary intake is one lifestyle factor shown to improve or maintain body composition. However, few studies have examined the Healthy Eating Index2015 (HEI2015), a measure of diet quality, and the association with body composition in adult men and women. METHODS Participant data (n = 3017) from the Coronary Artery Risk Development in Young Adults (CARDIA) study were used to examine the associations of the HEI2015 with body composition measures at Year 25 (Y25), including (1) 25 year-change in weight, body mass index (BMI), and waist circumference and (2) a computed tomography (CT) scan at Y25 measured muscle mass, muscle quality (better quality = less lipid within the muscle), and adipose tissue depots visceral adipose tissue (VAT), subcutaneous adipose tissue (SAT), and adipose within skeletal muscle (intermuscular adipose tissue; IMAT). Dietary intake was assessed by a diet history three times over 20 years, at years 0, 7, and 20. HEI2015, averaged over three exams, was created and categorized into quintiles. Multiple regression analysis evaluated the associations of body composition stratified across quintiles of HEI2015 adjusted for demographic characteristics, energy intake, lifestyle factors, and baseline anthropometric measures as appropriate. Race-sex interaction was tested (Pinteraction > 0.30). RESULTS Over 25 years of follow-up, averaged HEI2015 was significantly and inversely associated with weight gain (Quintile 1 (Q1) 37.3 lb vs. 32.9 in Q5; Ptrend = 0.01), change in BMI (Q1 5.8 kg/m2 vs. 5.0 in Q5; Ptrend = 0.005), and change in waist circumference (Q1 17.5 cm vs. 15.2 cm in Q5; Ptrend < 0.001). By Y25, HEI2015 was inversely associated with VAT Q1 136.8 cm3 vs. 116.6 in Q5; Ptrend < 0.001) and IMAT volumes (Q1 9.52 vs. 8.12 cm3 in Q5; Ptrend < 0.001). Although total muscle volume declined (Ptrend = 0.03), lean muscle mass volume was similar across quintiles (Ptrend = 0.55). The IMAT/total muscle mass ratio declined across HEI2015 quintiles (Ptrend < 0.001). Finally, higher HEI2015 was associated with better muscle quality at Y25 (higher value = less lipid within the muscle; Q1 41.1 vs. 42.2 HU in Q5; Ptrend = 0.002). HEI2015 was nonlinearly, but inversely, associated with SAT (nonlinear P = 0.011). CONCLUSIONS Improving diet quality in young to middle-aged adults is a recommended strategy to promote better measures of body composition. Our study findings suggest that healthier food choices may influence body composition.
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Affiliation(s)
- Masoud Isanejad
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
| | - Lyn M Steffen
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - James G Terry
- Department of Radiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - James M Shikany
- Division of Preventive Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Xia Zhou
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - So-YunYi
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - David R Jacobs
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - John Jeffrey Carr
- Department of Radiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Brian T Steffen
- Division of Computational Health Science, Department of Surgery, School of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
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Akazawa N, Funai K, Hino T, Tsuji R, Tamura W, Tamura K, Hioka A, Moriyama H. Increased intramuscular adipose tissue of the quadriceps at admission is more strongly related to activities of daily living recovery at discharge compared to muscle mass loss in older patients with aspiration pneumonia. BMC Geriatr 2024; 24:107. [PMID: 38287269 PMCID: PMC10826265 DOI: 10.1186/s12877-024-04718-7] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 01/17/2024] [Indexed: 01/31/2024] Open
Abstract
BACKGROUND Recent studies reported that an increase in intramuscular adipose tissue of the quadriceps in older patients negatively affects the recovery of activities of daily living (ADL) more than the loss of muscle mass. However, whether intramuscular adipose tissue of the quadriceps in older patients with aspiration pneumonia is related to ADL recovery remains unclear. This study aimed to determine the relationship between intramuscular adipose tissue of the quadriceps and ADL recovery in older patients with aspiration pneumonia. METHODS Thirty-nine older inpatients who were diagnosed with aspiration pneumonia participated in this prospective study. The main outcome of this study was ADL at discharge. ADL were assessed using the Barthel Index (BI). The intramuscular adipose tissue and muscle mass of the quadriceps were evaluated at admission using echo intensity and muscle thickness observed on ultrasound images. A multiple linear regression analysis was performed to confirm whether the quadriceps echo intensity was related to the BI score at discharge, even after adjusting for confounding factors. RESULTS The medians [interquartile range] of the BI score at admission and discharge were 15.0 [0.0-35.0] and 20.0 [5.0-55.0], respectively. The BI score at discharge was significantly higher than that at admission (p = 0.002). The quadriceps echo intensity (β = - 0.374; p = 0.036) and BI score at admission (β = 0.601; p < 0.001) were independently and significantly related to the BI score at discharge (R2 = 0.718; f2 = 2.546; statistical power = 1.000). In contrast, the quadriceps thickness (β = - 0.216; p = 0.318) was not independently and significantly related to the BI score at discharge. CONCLUSIONS Increased intramuscular adipose tissue of the quadriceps at admission is more strongly and negatively related to ADL recovery at discharge than the loss of muscle mass among older patients with aspiration pneumonia. Interventions targeting the intramuscular adipose tissue of the quadriceps may improve ADL among these patients.
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Affiliation(s)
- Naoki Akazawa
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Hoji 180, Nishihama, Yamashiro-Cho, Tokushima-City, Tokushima, 770-8514, Japan.
| | - Keita Funai
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Toshikazu Hino
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Ryota Tsuji
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Wataru Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Kimiyuki Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Akemi Hioka
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Hoji 180, Nishihama, Yamashiro-Cho, Tokushima-City, Tokushima, 770-8514, Japan
| | - Hideki Moriyama
- Life and Medical Sciences Area, Health Sciences Discipline, Kobe University, Kobe, Hyogo, Japan
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Wang L, Gao P, Li C, Liu Q, Yao Z, Li Y, Zhang X, Sun J, Simintiras C, Welborn M, McMillin K, Oprescu S, Kuang S, Fu X. A single-cell atlas of bovine skeletal muscle reveals mechanisms regulating intramuscular adipogenesis and fibrogenesis. J Cachexia Sarcopenia Muscle 2023; 14:2152-2167. [PMID: 37439037 PMCID: PMC10570087 DOI: 10.1002/jcsm.13292] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 11/17/2022] [Revised: 04/23/2023] [Accepted: 05/22/2023] [Indexed: 07/14/2023] Open
Abstract
BACKGROUND Intramuscular fat (IMF) and intramuscular connective tissue (IMC) are often seen in human myopathies and are central to beef quality. The mechanisms regulating their accumulation remain poorly understood. Here, we explored the possibility of using beef cattle as a novel model for mechanistic studies of intramuscular adipogenesis and fibrogenesis. METHODS Skeletal muscle single-cell RNAseq was performed on three cattle breeds, including Wagyu (high IMF), Brahman (abundant IMC but scarce IMF), and Wagyu/Brahman cross. Sophisticated bioinformatics analyses, including clustering analysis, gene set enrichment analyses, gene regulatory network construction, RNA velocity, pseudotime analysis, and cell-cell communication analysis, were performed to elucidate heterogeneities and differentiation processes of individual cell types and differences between cattle breeds. Experiments were conducted to validate the function and specificity of identified key regulatory and marker genes. Integrated analysis with multiple published human and non-human primate datasets was performed to identify common mechanisms. RESULTS A total of 32 708 cells and 21 clusters were identified, including fibro/adipogenic progenitor (FAP) and other resident and infiltrating cell types. We identified an endomysial adipogenic FAP subpopulation enriched for COL4A1 and CFD (log2FC = 3.19 and 1.92, respectively; P < 0.0001) and a perimysial fibrogenic FAP subpopulation enriched for COL1A1 and POSTN (log2FC = 1.83 and 0.87, respectively; P < 0.0001), both of which were likely derived from an unspecified subpopulation. Further analysis revealed more progressed adipogenic programming of Wagyu FAPs and more advanced fibrogenic programming of Brahman FAPs. Mechanistically, NAB2 drives CFD expression, which in turn promotes adipogenesis. CFD expression in FAPs of young cattle before the onset of intramuscular adipogenesis was predictive of IMF contents in adulthood (R2 = 0.885, P < 0.01). Similar adipogenic and fibrogenic FAPs were identified in humans and monkeys. In aged humans with metabolic syndrome and progressed Duchenne muscular dystrophy (DMD) patients, increased CFD expression was observed (P < 0.05 and P < 0.0001, respectively), which was positively correlated with adipogenic marker expression, including ADIPOQ (R2 = 0.303, P < 0.01; and R2 = 0.348, P < 0.01, respectively). The specificity of Postn/POSTN as a fibrogenic FAP marker was validated using a lineage-tracing mouse line. POSTN expression was elevated in Brahman FAPs (P < 0.0001) and DMD patients (P < 0.01) but not in aged humans. Strong interactions between vascular cells and FAPs were also identified. CONCLUSIONS Our study demonstrates the feasibility of beef cattle as a model for studying IMF and IMC. We illustrate the FAP programming during intramuscular adipogenesis and fibrogenesis and reveal the reliability of CFD as a predictor and biomarker of IMF accumulation in cattle and humans.
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Affiliation(s)
- Leshan Wang
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Peidong Gao
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Chaoyang Li
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Qianglin Liu
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Zeyang Yao
- Department of Computer ScienceOld Dominion UniversityNorfolkVAUSA
| | - Yuxia Li
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Xujia Zhang
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Jiangwen Sun
- Department of Computer ScienceOld Dominion UniversityNorfolkVAUSA
| | | | - Matthew Welborn
- School of Veterinary MedicineLouisiana State UniversityBaton RougeLAUSA
| | - Kenneth McMillin
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | | | - Shihuan Kuang
- Department of Animal SciencesPurdue UniversityWest LafayetteINUSA
| | - Xing Fu
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
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Akazawa N, Kishi M, Hino T, Tsuji R, Tamura K, Hioka A, Moriyama H. Longitudinal relationship between muscle mass and intramuscular adipose tissue of the quadriceps in older inpatients at different activities of daily living levels. Clin Nutr ESPEN 2023; 53:175-181. [PMID: 36657911 DOI: 10.1016/j.clnesp.2022.12.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 10/01/2022] [Revised: 11/14/2022] [Accepted: 12/08/2022] [Indexed: 12/23/2022]
Abstract
BACKGROUND & AIMS Whether there is a longitudinal relationship between muscle mass and intramuscular adipose tissue of the quadriceps at different activities of daily living (ADL) levels remains unclear. This study aimed to examine the longitudinal relationship between muscle mass and intramuscular adipose tissue of the quadriceps in older inpatients at different ADL levels. METHODS This prospective cohort study was hospital-based and included 198 inpatients aged ≥65 years. Ultrasound images were acquired using B-mode ultrasound imaging. Muscle mass and intramuscular adipose tissue of the quadriceps were assessed based on muscle thickness and echo intensity, respectively. The changes in quadriceps thickness and echo intensity were calculated by subtracting these baseline values from these values at discharge. ADL were assessed at admission using the Barthel Index (BI). The participants were divided into the low BI (BI score <60) and high BI (BI score ≥60) groups in accordance with the BI score. Multiple regression analysis was performed to examine whether the change in quadriceps echo intensity was independently and significantly related to change in quadriceps thickness, even after adjusting for confounding factors in the total participants and high and low BI groups. RESULTS The number of the high and low BI groups were 54 and 144. Change in quadriceps echo intensity was independently and significantly related to changes in quadriceps thickness of the total participants (β = -0.53, p < 0.01) and low BI (β = - 0.51, p < 0.01) and high BI (β = -0.70, p < 0.01) groups. CONCLUSIONS The results of this study indicate that there is a longitudinal negative relationship between muscle mass and intramuscular adipose tissue of the quadriceps in older inpatients regardless of ADL level. Intramuscular adipose tissue may be an important contributing factor for muscle mass.
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Affiliation(s)
- Naoki Akazawa
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan.
| | - Masaki Kishi
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Toshikazu Hino
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Ryota Tsuji
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Kimiyuki Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Akemi Hioka
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan
| | - Hideki Moriyama
- Life and Medical Sciences Area, Health Sciences Discipline, Kobe University, Kobe, Hyogo, Japan
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Yoshiko A, Ando R, Akima H. Passive muscle stiffness is correlated with the intramuscular adipose tissue in young individuals. Eur J Appl Physiol 2023; 123:1081-1090. [PMID: 36637509 DOI: 10.1007/s00421-023-05137-z] [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] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 01/05/2023] [Indexed: 01/14/2023]
Abstract
PURPOSE We investigated the relationship between intramuscular adipose tissue (IntraMAT) and muscle stiffness (passive and mechanical) and lengthening in young individuals, hypothesizing that (1) passive muscle stiffness is negatively correlated with the IntraMAT content, and (2) the IntraMAT content is negatively correlated with mechanical changes in muscle stiffness and fascicle length during passive dorsiflexion. METHODS Twenty men and women (20.3 ± 1.3 years) participated in this study. Axial T1-weighted magnetic resonance imaging was performed at the thickest point of the medial gastrocnemius (MG) to measure the IntraMAT cross-sectional area (CSA) and muscle tissue CSA (units; cm2). The shear wave velocity (SWV) and fascicle length at the three ankle joint angles, namely 15° with plantarflexion (PF15), 0° with neutral position (NP), and 15° with dorsiflexion (DF15), were measured as parameters of muscle stiffness (unit; m/s) and lengthening (unit; cm) using ultrasound shear wave elastography and B-mode imaging. We further calculated the changes in SWV and fascicle length from PF15 to NP and from NP to DF15 as mechanical muscle stiffness and lengthening, respectively. RESULTS There was a relationship between IntraMAT CSA and absolute SWV at DF15 (r = - 0.47, P < 0.05). Further, a relationship was observed between IntraMAT CSA and change in SWV and fascicle length from NP to DF15 (r = - 0.47 and r = 0.59, P < 0.05); whereas no relationship was observed between changes in fascicle length and muscle SWV (r = - 0.23, P = 0.33). CONCLUSION These results may indicate biomechanical and/or physiological associations between IntraMAT CSA and passive muscle stiffness.
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Affiliation(s)
- Akito Yoshiko
- Faculty of Liberal Arts and Sciences, Chukyo University, Toyota, Aichi, Japan
| | - Ryosuke Ando
- Department of Sport Science and Research, Japan Institute of Sports Sciences (JISS), 3-15-1, Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan. .,Center for General Education, Tokyo Keizai University, Kokubunji, Tokyo, Japan.
| | - Hiroshi Akima
- Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Aichi, Japan.,Graduate School of Education and Human Development, Nagoya University, Nagoya, Aichi, Japan
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Akazawa N, Kishi M, Hino T, Tsuji R, Tamura K, Hioka A, Moriyama H. Need for detailed analysis of quadriceps intramuscular adipose tissue and nutritional status. Clin Nutr 2022; 41:3124-3125. [PMID: 36336643 DOI: 10.1016/j.clnu.2022.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 10/19/2022] [Indexed: 01/27/2023]
Affiliation(s)
- Naoki Akazawa
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan.
| | - Masaki Kishi
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Toshikazu Hino
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Ryota Tsuji
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Kimiyuki Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Akemi Hioka
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan
| | - Hideki Moriyama
- Life and Medical Sciences Area, Health Sciences Discipline, Kobe University, Kobe, Hyogo, Japan
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Abstract
BACKGROUND In response to chronic injury, the muscles of the rotator cuff (RC) experience a unique degeneration characterized by extensive fatty infiltration and loss of contractile function. Human studies suggest this degeneration is also a feature of RC sarcopenia and may precede RC injury. In this study, we investigated whether RC muscles exhibit a similar unique sarcopenia in the mouse. METHODS Male and female mice were subdivided into four age groups: 3, 9, 18, and 24 months. The supraspinatus (SS) and infraspinatus muscles of the RC and the tibialis anterior (TA) muscle of the hindlimb were assessed. Muscle mass, contractile function, fibre cross-sectional areas and numbers, fatty infiltration, and fibrosis were assessed at each time point. Targeted transcriptional analyses were performed to assess the role of metabolic and inflammatory derangement in the pathology. RESULTS The 24-month-aged female mice exhibited decreased mass (25% lower than at 9 and 18 months, P < 0.01) in all muscles tested. However, only RC muscles also exhibited decreased contractile tension at this time point (20% lower than at 18 months, P < 0.005). Similarly, only female RC muscles exhibited increased fatty infiltration at 24 months (20% higher than 9 months, P < 0.05) and had elevated transcriptional markers of adipogenesis (2.4-fold higher Pparg and 3.8-fold higher Adipoq expression compared with 9 months, P < 0.001). Unbiased metabolic transcriptional profiling identified up-regulation of the antigen presentation (Z scores of 2.3 and 1.9 for SS and TA, respectively) and cytokine and chemokine signalling (Z scores of 3.1 and 2.4 for SS and TA, respectively) pathways in 24 month female muscle compared with 9. Further transcriptional analysis supported increased expression of pro-adipogenic inflammatory signals (6.3-fold increase in Il6 and 5.0-fold increase in Anxa2, P < 0.01) and increased presence of fibro-adipogenic progenitors (2.5-fold) in the 24-month-aged female RC compared with 9 months that together exacerbate fatty infiltration. CONCLUSIONS These data indicate that female mice replicate the unique sarcopenic pathology in the ageing human RC. Furthermore, they suggest that the exacerbated fatty infiltration is due to an interaction between higher resident fibro-adipogenic progenitor numbers and an elevated systemic inflammation in aged female mice. We conclude that female mouse RC muscle is a novel system to study both human RC degeneration and the signals that regulate sarcopenic fatty infiltration in general, which is prevalent in humans but largely absent from the rodent hindlimb.
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Affiliation(s)
- Gretchen A Meyer
- Program in Physical Therapy, Washington University, St. Louis, MO, USA.,Departments of Orthopaedic Surgery, Neurology and Biomedical Engineering, Washington University, St. Louis, MO, USA
| | - Karen C Shen
- Program in Physical Therapy, Washington University, St. Louis, MO, USA
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Akazawa N, Kishi M, Hino T, Tsuji R, Tamura K, Hioka A, Moriyama H. Longitudinal relationship between intramuscular adipose tissue of the quadriceps and activities of daily living in older inpatients. J Cachexia Sarcopenia Muscle 2021; 12:2231-2237. [PMID: 34704384 PMCID: PMC8718049 DOI: 10.1002/jcsm.12842] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 09/27/2021] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND The longitudinal relationship between intramuscular adipose tissue of the quadriceps and activities of daily living (ADL) in older inpatients remains unclear. This study aimed to examine whether decrease of intramuscular adipose tissue of the quadriceps in older inpatients is related to the recovery of ADL than increase of muscle mass. METHODS This longitudinal study included 202 inpatients aged ≥65 years [median age: 83.0 (77.0-88.0), 56.4% female]. Recovery of ADL during hospital stay was assessed using the change in Barthel index (BI) score (i.e. BI score at discharge minus BI score at admission) and BI score at discharge. Intramuscular adipose tissue and muscle mass of the quadriceps were assessed using echo intensity and muscle thickness on ultrasound images, respectively. Higher echo intensity indicates greater intramuscular adipose tissue. Multiple regression analysis was performed to identify the factors independently associated with the change in BI score and BI score at discharge. Changes in quadriceps echo intensity and thickness and subcutaneous fat thickness of the thigh, quadriceps echo intensity and thickness, and subcutaneous fat thickness of the thigh at admission, age, sex, days from onset disease, BI score at admission, and disease were set as independent variables. RESULTS The means of the change in quadriceps echo intensity and thickness were -2.3 ± 15.7 and 0.1 ± 0.4 cm, respectively. The median of the change in BI score was 15.0 (0.0-30.0). The quadriceps echo intensity at discharge was significantly lower than at admission (P = 0.043). The quadriceps thickness (P = 0.004) and BI score at discharge (P < 0.001) were significantly higher than those at admission. Change in quadriceps echo intensity was independently and significantly associated with the change in BI score (β = -0.25, P = 0.006) and BI score at discharge (β = -0.18, P = 0.006). In contrast, change in quadriceps thickness was not independently and significantly associated with the change in BI score (β = 0.09, P = 0.244) and BI score at discharge (β = 0.06, P = 0.244). CONCLUSIONS Our study indicates that a decrease of intramuscular adipose tissue of the quadriceps is related to the recovery of ADL than an increase of muscle mass in older inpatients. Intramuscular adipose tissue of the quadriceps in older inpatients is considered to be a predictor for the recovery of ADL, and intervening for intramuscular adipose tissue may be important for improving ADL in older inpatients.
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Affiliation(s)
- Naoki Akazawa
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan
| | - Masaki Kishi
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Toshikazu Hino
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Ryota Tsuji
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Kimiyuki Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Akemi Hioka
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan
| | - Hideki Moriyama
- Life and Medical Sciences Area, Health Sciences Discipline, Kobe University, Kobe, Japan
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Shang G, Han L, Wang Z, Song M, Wang D, Tan Y, Li Y, Li Y, Zhang W, Zhong M. Pim1 knockout alleviates sarcopenia in aging mice via reducing adipogenic differentiation of PDGFRα + mesenchymal progenitors. J Cachexia Sarcopenia Muscle 2021; 12:1741-1756. [PMID: 34435457 PMCID: PMC8718082 DOI: 10.1002/jcsm.12770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/01/2021] [Accepted: 07/10/2021] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Sarcopenia widely exists in elderly people and triggers numerous age-related events. The essential pathologic change lies in the increased intramuscular adipose tissue after aging with no exception to non-obese objects. Pim1 appears to be associated with adipogenic differentiation in recent studies, inspiring us to explore whether it regulates adipogenesis in aging muscles and affects sarcopenia. METHODS Wild-type and Pim1 knockout C57/BL6J mice were randomized into young and old groups. Histo-pathological and molecular biological methods were applied to assess the intramuscular adipose tissue content, the atrophy and regeneration, and the expressions of Pim1 and adipogenic transcription factors. PDGFRα+ mesenchymal progenitors were separated and their replicative aging model were established. Different time of adipogenic induction and different amounts of Pim1 inhibitor were applied, after which the adipogenic potency were evaluated. The expressions of Pim1 and adipogenic transcription factors were measured through western blotting. RESULTS The aging mice demonstrated decreased forelimb grip strength (P = 0.0003), hanging impulse (P < 0.0001), exhaustive running time (P < 0.0001), tetanic force (P = 0.0298), lean mass (P = 0.0008), and percentage of gastrocnemius weight in body weight (P < 0.0001), which were improved by Pim1 knockout (P = 0.0015, P = 0.0222, P < 0.0001, P = 0.0444, P = 0.0004, and P = 0.0003, respectively). To elucidate the mechanisms, analyses showed that Pim1 knockout decreased the fat mass (P = 0.0005) and reduced the intramuscular adipose tissue content (P = 0.0008) by inhibiting the C/EBPδ pathway (P = 0.0067) in aging mice, resulting in increased cross-sectional area of all and fast muscle fibres (P = 0.0017 and 0.0024 respectively), decreased levels of MuRF 1 and atrogin 1 (P = 0.0001 and 0.0329 respectively), and decreased content of Pax7 at the basal state (P = 0.0055). In vitro, senescent PDGFRα+ mesenchymal progenitors showed significantly increased the intracellular adipose tissue content (OD510) compared with young cells after 6 days of adipogenic induction (P < 0.0001). The Pim1 expression was elevated during adipogenic differentiation, and Pim1 inhibition significantly reduced the OD510 in senescent cells (P = 0.0040) by inhibiting the C/EBPδ pathway (P = 0.0047). CONCLUSIONS Pim1 knockout exerted protective effects in sarcopenia by inhibiting the adipogenic differentiation of PDGFRα+ mesenchymal progenitors induced by C/EBPδ activation and thus reducing the intramuscular adipose tissue content in aging mice. These results provide a potential target for the treatment of sarcopenia.
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Affiliation(s)
- Guo‐kai Shang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Lu Han
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
- Department of General Practice, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Zhi‐hao Wang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of MedicineShandong University; Shandong key Laboratory of Cardiovascular ProteomicsJinanShandongChina
| | - Ming Song
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Di Wang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Yan‐min Tan
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Yi‐hui Li
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
- Department of Critical Care Medicine, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Yu‐lin Li
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Wei Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Ming Zhong
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
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Rom H, Tamir S, Van Vugt JLA, Berger Y, Perl G, Morgenstern S, Tovar A, Brenner B, Benchimol D, Kashtan H, Sadot E. Sarcopenia as a Predictor of Survival in Patients with Pancreatic Adenocarcinoma After Pancreatectomy. Ann Surg Oncol 2021; 29:1553-1563. [PMID: 34716836 DOI: 10.1245/s10434-021-10995-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 06/22/2021] [Accepted: 10/06/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To determine whether sarcopenia can potentially predict worse survival after resection of pancreatic ductal adenocarcinoma. BACKGROUND Sarcopenia is correlated with poor outcomes in hepatopancreatobiliary malignancies, but the relationship of both its qualitative and quantitative features with patient survival after pancreatectomy has not been investigated in a western population. PATIENTS AND METHODS Preoperative cross-sectional computed tomography scans of consecutive patients who underwent pancreatectomy in 2005-2017 were evaluated for skeletal muscle index (SMI), intramuscular adipose tissue content (IMAC), and visceral-to-subcutaneous adipose tissue area ratio (VSR). Sex-specific categorical cut-offs were determined. Findings were correlated with outcome. RESULTS The study included 111 patients, 47% of whom were female, with a median age of 67 years (range: 35-87 years), and median body mass index of 23 kg/m2 (range: 16-40 kg/m2); 77% had a Whipple procedure and 66% received adjuvant chemotherapy. Low SMI correlated with poor overall survival (OS) (P = 0.007), disease-specific survival (DSS) (P = 0.006), and recurrence-free survival (RFS) (P = 0.01). High IMAC correlated with poor OS (P = 0.04). Patients with high IMAC tended to have a shorter DSS (P = 0.09), with no correlation with RFS (P = 0.6). VSR was not associated with survival. Multivariable analysis yielded an independent association of low SMI with OS (HR = 1.7, 95%CI: 1.1-2.8, P = 0.02), DSS (HR = 1.8, 95%CI: 1.03-3.2, P = 0.04), and RFS (HR = 1.8, 95%CI: 1.1-2.8, P = 0.01), and of high IMAC with OS (HR = 1.9, 95%CI: 1.1-3.1, P = 0.01). CONCLUSION Both qualitative and quantitative measures of skeletal muscle were independently associated with impaired survival in patients with resectable PDAC. Sarcopenia might serve as an early radiographic surrogate of aggressive tumor behavior, with potential implications for clinical decision-making and future study.
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Affiliation(s)
- Hadass Rom
- Department of Surgery, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shlomit Tamir
- Department of Radiology, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Jeroen L A Van Vugt
- Department of Surgery, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Yael Berger
- Department of Surgery, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Gali Perl
- Department of Oncology, Davidoff Cancer Center, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel
| | - Sara Morgenstern
- Institute of Pathology, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel
| | - Ana Tovar
- Institute of Pathology, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel
| | - Baruch Brenner
- Department of Oncology, Davidoff Cancer Center, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel
| | - Daniel Benchimol
- Department of Surgery, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel
| | - Hanoch Kashtan
- Department of Surgery, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Eran Sadot
- Department of Surgery, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel. .,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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Akazawa N, Kishi M, Hino T, Tsuji R, Tamura K, Hioka A, Moriyama H. Intramuscular adipose tissue in the quadriceps is more strongly related to recovery of activities of daily living than muscle mass in older inpatients. J Cachexia Sarcopenia Muscle 2021; 12:891-899. [PMID: 33998169 PMCID: PMC8350216 DOI: 10.1002/jcsm.12713] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 03/24/2021] [Accepted: 04/19/2021] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND The relationship between intramuscular adipose tissue at admission and recovery of activities of daily living (ADL) remains unclear. This study aimed to examine the relationship between intramuscular adipose tissue in the quadriceps at admission and recovery of ADL in older inpatients. METHODS This prospective study included 404 inpatients aged ≥65 years (54.7% female). Recovery of ADL during hospital stay was assessed using the Barthel Index (BI) score at discharge, BI score change, and BI efficiency. Higher BI at discharge, BI score change, and BI efficiency indicate more improvement in ADL. Intramuscular adipose tissue and muscle mass of the quadriceps were assessed using echo intensity and muscle thickness on ultrasound images, respectively. Multiple regression analysis was performed to identify factors independently associated with BI score at discharge, BI score change, and BI efficiency. The independent variables were BI score at admission, echo intensity and muscle thickness of the quadriceps, age, sex, number of medications, C-reactive protein concentration, updated Charlson Comorbidity Index score, Food Intake Level Scale, Geriatric Nutritional Risk Index score, days from onset disease, length of hospital stay, number of units of rehabilitation therapy, and subcutaneous fat thickness of the thigh. RESULTS The medians (inter-quartile range) of the BI score at discharge, BI score change, and BI efficiency were 60.0 (35.0-80.0), 10.0 (0.0-25.0), and 0.11 (0.00-0.37), respectively. The median (inter-quartile range) of the length of hospital stay (days) and days from onset disease were 58.0 (39.0-92.0) and 79.0 (49.0-112.0), respectively. Quadriceps echo intensity was independently and significantly associated with the BI score at discharge (β = -0.13, P < 0.01), BI score change (β = -0.23, P < 0.01), and BI efficiency (β = -0.21, P < 0.01). Quadriceps thickness was not independently and significantly associated with the BI score at discharge (β = -0.02, P = 0.68), BI score change (β = -0.02, P = 0.79), and BI efficiency (β = 0.03, P = 0.67). CONCLUSIONS Our study indicates that greater intramuscular adipose tissue in the quadriceps at admission is more strongly related to worse recovery of ADL than less muscle mass in older inpatients. Greater intramuscular adipose tissue in the quadriceps in older inpatients is considered to be a predictor of worse recovery of ADL, and intervening for greater intramuscular adipose tissue may be important for improving ADL in older inpatients.
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Affiliation(s)
- Naoki Akazawa
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Yamashiro-cho, Tokushima, Tokushima, Japan
| | - Masaki Kishi
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Toshikazu Hino
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Ryota Tsuji
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Kimiyuki Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Akemi Hioka
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Yamashiro-cho, Tokushima, Tokushima, Japan
| | - Hideki Moriyama
- Life and Medical Sciences Area, Health Sciences Discipline, Kobe University, Kobe, Hyogo, Japan
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Akazawa N, Kishi M, Hino T, Tsuji R, Tamura K, Hioka A, Moriyama H. Intramuscular adipose tissue of the quadriceps is more strongly related to recovery of swallowing ability than is muscle mass in older inpatients: A prospective study. Nutrition 2021; 91-92:111364. [PMID: 34246889 DOI: 10.1016/j.nut.2021.111364] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 03/07/2021] [Revised: 05/06/2021] [Accepted: 05/23/2021] [Indexed: 12/30/2022]
Abstract
OBJECTIVES This study aimed to examine whether intramuscular adipose tissue of the quadriceps at admission is related to the recovery of swallowing ability during a hospital stay in older inpatients. METHODS This prospective study included 344 inpatients ages ≥ 65 y. Those who had stroke that was the obvious cause of dysphagia were excluded. Recovery of swallowing ability was assessed using Food Intake Level Scale (FILS) score at discharge and FILS change. Ultrasound images were acquired at admission. Intramuscular adipose tissue and muscle mass of the quadriceps were assessed based on echo intensity and muscle thickness, respectively. Multiple regression analysis was performed to examine whether quadriceps echo intensity is independently associated with FILS score at discharge and FILS change. The independent variables were quadriceps echo intensity and thickness, subcutaneous fat thickness of the thigh, Barthel Index score at admission, age, sex, number of medications, C-reactive protein, updated Charlson Comorbidity Index, FILS score at admission, Geriatric Nutritional Risk Index, days from disease onset, length of hospital stay, and units of rehabilitation therapy. RESULTS Quadriceps echo intensity was independently and significantly associated with FILS score at discharge (β = -0.15, P < 0.01) and FILS change (β = -0.19, P < 0.01). Quadriceps thickness was not independently and significantly associated with FILS score at discharge or FILS change. CONCLUSIONS The present study revealed that intramuscular adipose tissue of the quadriceps in older inpatients is more strongly related to recovery of swallowing ability than is muscle mass.
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Affiliation(s)
- Naoki Akazawa
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Japan.
| | - Masaki Kishi
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Toshikazu Hino
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Ryota Tsuji
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Kimiyuki Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Japan
| | - Akemi Hioka
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Japan
| | - Hideki Moriyama
- Life and Medical Sciences Area, Health Sciences Discipline, Kobe University, Kobe, Japan
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Akazawa N, Kishi M, Hino T, Tsuji R, Tamura K, Hioka A, Moriyama H. Increased intramuscular adipose tissue of the quadriceps is related to decreased activities of daily living in patients who have had a stroke. Nutrition 2021; 90:111277. [PMID: 34010746 DOI: 10.1016/j.nut.2021.111277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 12/26/2020] [Revised: 03/18/2021] [Accepted: 04/02/2021] [Indexed: 02/06/2023]
Abstract
OBJECTIVE This study examined the relationships between intramuscular adipose tissue of the quadriceps on the paretic and non-paretic sides at admission and activities of daily living (ADL) at discharge in patients who had a stroke. METHODS This prospective cohort study included 44 stroke inpatients. ADL were assessed at discharge using the Barthel index (BI) score. Ultrasound images were acquired at admission using B-mode ultrasound imaging. Intramuscular adipose tissue and muscle mass of the quadriceps were assessed based on echo intensity and muscle thickness, respectively. Relationships between BI score at discharge and quadriceps echo intensity or thickness on the paretic and non-paretic sides were assessed using partial correlation coefficients. Age, sex, days from onset of stroke, Fugl-Meyer assessment lower extremity score, and subcutaneous fat thickness of the thigh were used as the control variables in the partial correlation analysis. RESULTS BI score at discharge was significantly related to quadriceps echo intensity on the paretic (partial correlation coefficient = -0.377, P = 0.018) and non-paretic (partial correlation coefficient = -0.364, P = 0.023) sides. By contrast, quadriceps thickness on the paretic (partial correlation coefficient = 0.284, P = 0.075) and non-paretic (partial correlation coefficient = 0.278, P = 0.083) sides were not significantly related to BI score at discharge. CONCLUSIONS The present study revealed the negative relationship between intramuscular adipose tissue of the quadriceps on the paretic and non-paretic sides at admission and ADL at discharge. Assessments and interventions of intramuscular adipose tissue in the quadriceps may be essential for predicting and improving ADL of patients who have had a stroke.
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Affiliation(s)
- Naoki Akazawa
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan.
| | - Masaki Kishi
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Toshikazu Hino
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Ryota Tsuji
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Kimiyuki Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Akemi Hioka
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan
| | - Hideki Moriyama
- Life and Medical Sciences Area, Health Sciences Discipline, Kobe University, Kobe, Hyogo, Japan
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15
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Peng DQ, Smith SB, Lee HG. Vitamin A regulates intramuscular adipose tissue and muscle development: promoting high-quality beef production. J Anim Sci Biotechnol 2021; 12:34. [PMID: 33663602 PMCID: PMC7934359 DOI: 10.1186/s40104-021-00558-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 01/18/2021] [Indexed: 01/07/2023] Open
Abstract
During growth in cattle, the development of intramuscular adipose tissue and muscle is dependent upon cell hyperplasia (increased number of adipocytes) and hypertrophy (increased size of adipocytes). Based on the results of previous studies, other adipose tissue depots (e.g., perirenal and subcutaneous) develop from the fetal stage primarily as brown adipose tissue. The hyperplastic stage of intramuscular adipose is considered to develop from late pregnancy, but there is no evidence indicating that intramuscular adipose tissue develops initially as brown adipose tissue. Hyperplastic growth of intramuscular adipose continues well into postweaning and is dependent on the timing of the transition to grain-based diets; thereafter, the late-stage development of intramuscular adipose tissue is dominated by hypertrophy. For muscle development, hyperplasia of myoblasts lasts from early (following development of somites in the embryo) to middle pregnancy, after which growth of muscle is the result of hypertrophy of myofibers. Vitamin A is a fat-soluble compound that is required for the normal immunologic function, vision, cellular proliferation, and differentiation. Here we review the roles of vitamin A in intramuscular adipose tissue and muscle development in cattle. Vitamin A regulates both hyperplasia and hypertrophy in in vitro experiments. Vitamin A supplementation at the early stage and restriction at fattening stage generate opposite effects in the beef cattle. Appropriate vitamin A supplementation and restriction strategy increase intramuscular adipose tissue development (i.e., marbling or intramuscular fat) in some in vivo trials. Besides, hyperplasia and hypertrophy of myoblasts/myotubes were affected by vitamin A treatment in in vitro trials. Additionally, some studies reported an interaction between the alcohol dehydrogenase-1C (ADH1C) genotype and vitamin A feed restriction for the development of marbling and/or intramuscular adipose tissue, which was dependent on the timing and level of vitamin A restriction. Therefore, the feed strategy of vitamin A has the visible impact on the marbling and muscle development in the cattle, which will be helpful to promote the quality of the beef.
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Affiliation(s)
- Dong Qiao Peng
- Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul, 05029, South Korea
| | - Stephen B Smith
- Department of Animal Science, Texas A&M University, College Station, TX, 77843, USA
| | - Hong Gu Lee
- Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul, 05029, South Korea.
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Akazawa N, Kishi M, Hino T, Tsuji R, Tamura K, Hioka A, Moriyama H. Relationship Between Aging and Intramuscular Adipose Tissue in Older Inpatients. J Am Med Dir Assoc 2020; 22:1287-1291.e1. [PMID: 33127329 DOI: 10.1016/j.jamda.2020.09.017] [Citation(s) in RCA: 12] [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] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/09/2020] [Accepted: 09/14/2020] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Although older inpatients are known to develop various conditions, whether aging affects intramuscular adipose tissue in older inpatients remains unclear. In particular, an increase in intramuscular adipose tissue in persons aged ≥85 years has previously not been revealed in either older inpatients or community-dwelling older individuals. This study therefore aimed to examine whether aging affects intramuscular adipose tissue in older inpatients. DESIGN Cross-sectional study. SETTING AND PARTICIPANTS This study was clinical-based and included 404 inpatients aged ≥65 years. METHODS We divided the participants into the following age groups: 65-74 years (n = 63), 75-84 years (n = 171), and ≥85 years (n = 170). B-mode ultrasound imaging was performed, and the intramuscular adipose tissue of the quadriceps was assessed based on echo intensity. One-way analysis of variance and analysis of covariance were used to compare the echo intensity of the quadriceps between the 65-74-year, 75-84-year, and ≥85-year groups. RESULTS The median (25th-75th percentile) ages of the 65-74-year group, 75-84-year group, and ≥85-year group were 70.0 (68.0-73.0), 80.0 (77.0-82.0), and 89.0 (87.0-91.0), respectively. In the one-way analysis of variance, the quadriceps echo intensity of the ≥85-year group was significantly higher than that of the 65-74-year and 75-84-year groups. In addition, the ≥85-year group had significantly higher quadriceps echo intensity than the 65-74-year group, even after adjusting for other confounding factors. CONCLUSIONS AND IMPLICATIONS The current study revealed that intramuscular adipose tissue in older inpatients increases with age, and the levels of intramuscular adipose tissue of older inpatients aged ≥85 years is higher than those of older inpatients aged 65-74 years.
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Affiliation(s)
- Naoki Akazawa
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan.
| | - Masaki Kishi
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Toshikazu Hino
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Ryota Tsuji
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Kimiyuki Tamura
- Department of Rehabilitation, Kasei Tamura Hospital, Wakayama, Wakayama, Japan
| | - Akemi Hioka
- Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University, Tokushima, Tokushima, Japan
| | - Hideki Moriyama
- Life and Medical Sciences Area, Health Sciences Discipline, Kobe University, Kobe, Hyogo, Japan
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Kimura Y, Yamada M, Ohji S, Ishiyama D, Nishio N, Otobe Y, Koyama S, Suzuki M, Ichikawa T, Ito D, Maehori N, Nagae H. Presence of sarcopenic obesity and evaluation of the associated muscle quality in Japanese older men with prostate cancer undergoing androgen deprivation therapy. J Geriatr Oncol 2019; 10:835-838. [PMID: 30956136 DOI: 10.1016/j.jgo.2019.03.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 03/19/2019] [Accepted: 03/25/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Yosuke Kimura
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, Japan; Department of Rehabilitation, Tokyo Shinjuku Medical Center, Japan Community Health care Organization, 5-1 Tukudocho, Shinjuku-ku, Tokyo 162-8543, Japan.
| | - Minoru Yamada
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, Japan
| | - Shunsuke Ohji
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, Japan
| | - Daisuke Ishiyama
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, Japan
| | - Naohito Nishio
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, Japan
| | - Yuhei Otobe
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, Japan
| | - Shingo Koyama
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, Japan
| | - Mizue Suzuki
- Department of Rehabilitation, Tokyo Shinjuku Medical Center, Japan Community Health care Organization, 5-1 Tukudocho, Shinjuku-ku, Tokyo 162-8543, Japan
| | - Takeo Ichikawa
- Department of Rehabilitation, Tokyo Shinjuku Medical Center, Japan Community Health care Organization, 5-1 Tukudocho, Shinjuku-ku, Tokyo 162-8543, Japan
| | - Daisuke Ito
- Department of Rehabilitation, Tokyo Shinjuku Medical Center, Japan Community Health care Organization, 5-1 Tukudocho, Shinjuku-ku, Tokyo 162-8543, Japan
| | - Naomi Maehori
- Nagae Prostate Clinic, 7172-2619 Hosoecho Nakagawa, Kita-ku, Hamamatsu-City, Shizuoka 431-1304, Japan
| | - Hiroshi Nagae
- Nagae Prostate Clinic, 7172-2619 Hosoecho Nakagawa, Kita-ku, Hamamatsu-City, Shizuoka 431-1304, Japan
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18
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Yoshiko A, Yamauchi K, Kato T, Ishida K, Koike T, Oshida Y, Akima H. Effects of post-fracture non-weight-bearing immobilization on muscle atrophy, intramuscular and intermuscular adipose tissues in the thigh and calf. Skeletal Radiol 2018; 47:1541-1549. [PMID: 29948037 DOI: 10.1007/s00256-018-2985-6] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 05/22/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Disuse and/or a non-weight-bearing condition changes muscle composition, with decreased skeletal muscle tissue and increased fat within (intramuscular adipose tissue, IntraMAT) and between (intermuscular adipose tissue, InterMAT) given muscles. Excessive adipose tissue contributes to dysfunctional and metabolically impaired muscle. How these adipose tissues change during orthopedic treatment (e.g., cast immobilization, daily use of crutches) is not well documented. This study aimed to quantify changes in IntraMAT, InterMAT, and thigh and calf muscle tissue during orthopedic treatment. MATERIALS AND METHODS We studied 8 patients with fifth metatarsal bone or fibular fractures. The ankle joint involved underwent plaster casting for approximately 4 weeks, with crutches used during that time. Axial T1-weighted MRI at the mid-thigh and a 30% proximal site at the calf were obtained to measure IntraMAT and InterMAT cross-sectional areas (CSAs) and skeletal muscle tissue CSA before treatment and 4 weeks afterward. RESULTS Thigh and calf muscle tissue CSAs were significantly decreased from before to after treatment: thigh, 85.8 ± 7.6 to 77.1 ± 7.3 cm2; calf, 53.3 ± 5.5 to 48.9 ± 5.0 cm2 (p < 0.05). None of the IntraMAT or InterMAT changes was statistically significant. There was a relation between the percentage change of thigh IntraMAT CSA and muscle tissue CSA (rs = -0.86, p < 0.01). CONCLUSIONS The 4 weeks of treatment primarily induced skeletal muscle atrophy with less of an effect on IntraMAT or InterMAT. There is a risk of increasing IntraMAT relatively by decreasing skeletal muscle tissue size during orthopedic treatment.
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Affiliation(s)
- Akito Yoshiko
- Graduate School of Medicine, Nagoya University, Nagoya, Japan.
| | - Koun Yamauchi
- Graduate School of Medicine, Nagoya University, Nagoya, Japan
- Department of Orthopedic Surgery, Akita Hospital, Chiryu, Japan
| | - Takayuki Kato
- Department of Orthopedic Surgery, Akita Hospital, Chiryu, Japan
| | - Koji Ishida
- Graduate School of Medicine, Nagoya University, Nagoya, Japan
- Research Center of Health, Physical Fitness & Sports, Nagoya University, Nagoya, Japan
| | - Teruhiko Koike
- Graduate School of Medicine, Nagoya University, Nagoya, Japan
- Research Center of Health, Physical Fitness & Sports, Nagoya University, Nagoya, Japan
| | - Yoshiharu Oshida
- Graduate School of Medicine, Nagoya University, Nagoya, Japan
- Research Center of Health, Physical Fitness & Sports, Nagoya University, Nagoya, Japan
| | - Hiroshi Akima
- Research Center of Health, Physical Fitness & Sports, Nagoya University, Nagoya, Japan
- Graduate School of Education and Human Development, Nagoya University, Nagoya, Japan
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19
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Harimoto N, Hoshino H, Muranushi R, Hagiwara K, Yamanaka T, Ishii N, Tsukagoshi M, Igarashi T, Watanabe A, Kubo N, Araki K, Shirabe K. Skeletal Muscle Volume and Intramuscular Adipose Tissue Are Prognostic Predictors of Postoperative Complications After Hepatic Resection. Anticancer Res 2018; 38:4933-4939. [PMID: 30061272 DOI: 10.21873/anticanres.12810] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 06/04/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Recently, skeletal muscle quality was important in patients with malignant tumors to predict the surgical outcome. The relationship between postoperative complications of Clavien-Dindo grade III or more and prognosis in patients who have undergone hepatic resection for hepatic malignancies were investigated. PATIENTS AND METHODS Patient data were retrospectively collected for 146 consecutive patients who underwent curative hepatic resection in the Department of Hepatobiliary and Pancreatic Surgery, Gunma University, Japan, for hepatic malignancy. The patients were assigned to two groups according to the presence of postoperative complications. The clinicopathological and surgical outcomes were analyzed. Skeletal muscle area (SMA) and intramuscular adipose tissue content (IMAC) were also evaluated. RESULTS No hospital deaths occurred. Postoperative complications were identified in 12 patients (8.2%). Univariate and multivariate analyses revealed that the independent risk factors for postoperative complications were hemodialysis, psychiatric disorder, high CONUT (controlling nutritional status) score and patients both with low SMA and high IMAC. CONCLUSION Intensive surgical care is necessary for high-risk patients with hemodialysis, psychiatric disorder, high CONUT count and/or low skeletal muscle quality to reduce postoperative complication.
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Affiliation(s)
- Norifumi Harimoto
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Hiroki Hoshino
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Ryo Muranushi
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Kei Hagiwara
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Takahiro Yamanaka
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Norihiro Ishii
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Mariko Tsukagoshi
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Takamichi Igarashi
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Akira Watanabe
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Norio Kubo
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Kenichirou Araki
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Ken Shirabe
- Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan
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20
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Gorski T, Mathes S, Krützfeldt J. Uncoupling protein 1 expression in adipocytes derived from skeletal muscle fibro/adipogenic progenitors is under genetic and hormonal control. J Cachexia Sarcopenia Muscle 2018; 9:384-399. [PMID: 29399988 PMCID: PMC5879989 DOI: 10.1002/jcsm.12277] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 09/29/2017] [Accepted: 11/20/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Intramuscular fatty infiltration is generally associated with the accumulation of white adipocytes in skeletal muscle and unfavourable metabolic outcomes. It is, however, still unclear whether intramuscular adipocytes could also acquire a brown-like phenotype. Here, we detected intramuscular expression of brown adipocyte markers during fatty infiltration in an obesity-resistant mouse strain and extensively compared the potential of two different stem cell populations residing in skeletal muscle to differentiate into brown-like adipocytes. METHODS Fatty infiltration was induced using intramuscular glycerol or cardiotoxin injection in the tibialis anterior muscles of young or aged 129S6/SvEvTac (Sv/129) mice or interleukin-6 (IL-6) knockout mice, and the expression of general and brown adipocyte markers was assessed after 4 weeks. Fibro/adipogenic progenitors (FAPs) and myogenic progenitors were prospectively isolated using fluorescence-activated cell sorting from skeletal muscle of male and female C57Bl6/6J and Sv/129 mice, and monoclonal and polyclonal cultures were treated with brown adipogenic medium. Additionally, FAPs were differentiated with medium supplemented or not with triiodothyronine. RESULTS Although skeletal muscle expression of uncoupling protein 1 (Ucp1) was barely detectable in uninjected tibialis anterior muscle, it was drastically induced following intramuscular adipogenesis in Sv/129 mice and further increased in response to beta 3-adrenergic stimulation. Intramuscular Ucp1 expression did not depend on IL-6 and was preserved in aged skeletal muscle. Myogenic progenitors did not form adipocytes neither in polyclonal nor monoclonal cultures. Fibro/adipogenic progenitors, on the other hand, readily differentiated into brown-like, UCP1+ adipocytes. Uncoupling protein 1 expression in differentiated FAPs was regulated by genetic background, sex, and triiodothyronine treatment independently of adipogenic differentiation levels. CONCLUSIONS Intramuscular adipogenesis is associated with increased Ucp1 expression in skeletal muscle from obesity-resistant mice. Fibro/adipogenic progenitors provide a likely source for intramuscular adipocytes expressing UCP1 under control of both genetic and hormonal factors. Therefore, FAPs constitute a possible target for therapies aiming at the browning of intramuscular adipose tissue and the metabolic improvement of skeletal muscle affected by fatty infiltration.
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Affiliation(s)
- Tatiane Gorski
- Division of Endocrinology, Diabetes, and Clinical NutritionUniversity Hospital ZürichRämistrasse 100Zürich8091Switzerland
- Competence Center Personalized Medicine UZH/ETHETH Zürich and University of ZürichZürichSwitzerland
| | - Sebastian Mathes
- Division of Endocrinology, Diabetes, and Clinical NutritionUniversity Hospital ZürichRämistrasse 100Zürich8091Switzerland
- Zürich Center for Integrative Human PhysiologyUniversity of ZürichZürichSwitzerland
| | - Jan Krützfeldt
- Division of Endocrinology, Diabetes, and Clinical NutritionUniversity Hospital ZürichRämistrasse 100Zürich8091Switzerland
- Competence Center Personalized Medicine UZH/ETHETH Zürich and University of ZürichZürichSwitzerland
- Zürich Center for Integrative Human PhysiologyUniversity of ZürichZürichSwitzerland
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21
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Akima H, Hioki M, Yoshiko A, Koike T, Sakakibara H, Takahashi H, Oshida Y. Intramuscular adipose tissue determined by T1-weighted MRI at 3T primarily reflects extramyocellular lipids. Magn Reson Imaging 2015; 34:397-403. [PMID: 26743430 DOI: 10.1016/j.mri.2015.12.038] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [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: 05/21/2015] [Accepted: 12/27/2015] [Indexed: 12/14/2022]
Abstract
PURPOSE The purpose of this study was to assess relationships between intramuscular adipose tissue (IntraMAT) content determined by MRI and intramyocellular lipids (IMCL) and extramyocellular lipids (EMCL) determined by (1)H magnetic resonance spectroscopy ((1)H MRS) or echo intensity determined by B-mode ultrasonography of human skeletal muscles. METHODS Thirty young and elderly men and women were included. T1-weighted MRI was taken from the right mid-thigh to measure IntraMAT content of the vastus lateralis (VL) and biceps femoris (BF) using a histogram shape-based thresholding technique. IMCL and EMCL were measured from the VL and BF at the right mid-thigh using (1)H MRS. Ultrasonographic images were taken from the VL and BF of the right mid-thigh to measure echo intensity based on gray-scale level for quantitative analysis. RESULTS There was a significant correlation between IntraMAT content by MRI and EMCL of the VL and BF (VL, r=0.506, P<0.01; BF, r=0.591, P<0.001) and between echo intensity and EMCL of the VL and BF (VL, r=0.485, P<0.05; BF, r=0.648, P<0.01). IntraMAT content was also significantly correlated with echo intensity of the VL and BF (VL, r=0.404, P<0.05; BF, r=0.493, P<0.01). CONCLUSION Our study suggests that IntraMAT content determined by T1-weighted MRI at 3T primarily reflects extramyocellular lipids, not intramyocellular lipids, in human skeletal muscles.
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Affiliation(s)
- Hiroshi Akima
- Research Center of Health, Physical Fitness & Sports, 1 Furo, Chikusa, Nagoya, Aichi, 4648601, Japan; Graduate School of Education & Human Development, Nagoya University, 1 Furo, Chikusa, Nagoya, Aichi, 4648601, Japan.
| | - Maya Hioki
- Graduate School of Medicine, Nagoya University, 65 Tsurumai, Showa, Nagoya, Aichi 4668550, Japan
| | - Akito Yoshiko
- Graduate School of Medicine, Nagoya University, 65 Tsurumai, Showa, Nagoya, Aichi 4668550, Japan
| | - Teruhiko Koike
- Research Center of Health, Physical Fitness & Sports, 1 Furo, Chikusa, Nagoya, Aichi, 4648601, Japan; Graduate School of Medicine, Nagoya University, 65 Tsurumai, Showa, Nagoya, Aichi 4668550, Japan
| | - Hisataka Sakakibara
- Graduate School of Medicine, Nagoya University, 65 Tsurumai, Showa, Nagoya, Aichi 4668550, Japan
| | - Hideyuki Takahashi
- Japan Institute of Sports Sciences, 3-15-1 Nishigaoka, Kita, Tokyo 1150056, Japan
| | - Yoshiharu Oshida
- Research Center of Health, Physical Fitness & Sports, 1 Furo, Chikusa, Nagoya, Aichi, 4648601, Japan; Graduate School of Medicine, Nagoya University, 65 Tsurumai, Showa, Nagoya, Aichi 4668550, Japan
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22
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Karampatos S, Papaioannou A, Beattie KA, Maly MR, Chan A, Adachi JD, Pritchard JM. The reliability of a segmentation methodology for assessing intramuscular adipose tissue and other soft-tissue compartments of lower leg MRI images. MAGMA 2015; 29:237-44. [PMID: 26702939 DOI: 10.1007/s10334-015-0510-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 10/06/2015] [Accepted: 11/06/2015] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Determine the reliability of a magnetic resonance (MR) image segmentation protocol for quantifying intramuscular adipose tissue (IntraMAT), subcutaneous adipose tissue, total muscle and intermuscular adipose tissue (InterMAT) of the lower leg. MATERIALS AND METHODS Ten axial lower leg MRI slices were obtained from 21 postmenopausal women using a 1 Tesla peripheral MRI system. Images were analyzed using sliceOmatic™ software. The average cross-sectional areas of the tissues were computed for the ten slices. Intra-rater and inter-rater reliability were determined and expressed as the standard error of measurement (SEM) (absolute reliability) and intraclass coefficient (ICC) (relative reliability). RESULTS Intra-rater and inter-rater reliability for IntraMAT were 0.991 (95% confidence interval [CI] 0.978-0.996, p < 0.05) and 0.983 (95% CI 0.958-9.993, p < 0.05), respectively. For the other soft tissue compartments, the ICCs were all >0.90 (p < 0.05). The absolute intra-rater and inter-rater reliability (expressed as SEM) for segmenting IntraMAT were 22.19 mm(2) (95% CI 16.97-32.04) and 78.89 mm(2) (95% CI 60.36-113.92), respectively. CONCLUSION This is a reliable segmentation protocol for quantifying IntraMAT and other soft-tissue compartments of the lower leg. A standard operating procedure manual is provided to assist users, and SEM values can be used to estimate sample size and determine confidence in repeated measurements in future research.
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Affiliation(s)
- Sarah Karampatos
- Department of Medicine, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada. .,Juravinski Research Centre, Geriatric Education and Research in the Aging Sciences (GERAS) Centre, 88 Maplewood Avenue, Hamilton, ON, L8M 1W9, Canada. .,Department of Rehabilitation Sciences, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada.
| | - Alexandra Papaioannou
- Department of Medicine, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada.,Juravinski Research Centre, Geriatric Education and Research in the Aging Sciences (GERAS) Centre, 88 Maplewood Avenue, Hamilton, ON, L8M 1W9, Canada.,Department of Biostatistics and Epidemiology, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada
| | - Karen A Beattie
- Department of Medicine, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada
| | - Monica R Maly
- Department of Rehabilitation Sciences, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada
| | - Adrian Chan
- Faculty of Health Sciences, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada
| | - Jonathan D Adachi
- Department of Medicine, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada
| | - Janet M Pritchard
- Department of Medicine, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada.,Juravinski Research Centre, Geriatric Education and Research in the Aging Sciences (GERAS) Centre, 88 Maplewood Avenue, Hamilton, ON, L8M 1W9, Canada
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