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Original Articles
Carnitine Metabolite as a Potential Circulating Biomarker for Sarcopenia in Men
Je Hyun Seo, Jung-Min Koh, Han Jin Cho, Hanjun Kim, Young‑Sun Lee, Su Jung Kim, Pil Whan Yoon, Won Kim, Sung Jin Bae, Hong-Kyu Kim, Hyun Ju Yoo, Seung Hun Lee
Received July 28, 2024  Accepted October 7, 2024  Published online November 28, 2024  
DOI: https://doi.org/10.3803/EnM.2024.2117    [Epub ahead of print]
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Sarcopenia, a multifactorial disorder involving metabolic disturbance, suggests potential for metabolite biomarkers. Carnitine (CN), essential for skeletal muscle energy metabolism, may be a candidate biomarker. We investigated whether CN metabolites are biomarkers for sarcopenia.
Methods
Associations between the CN metabolites identified from an animal model of sarcopenia and muscle cells and sarcopenia status were evaluated in men from an age-matched discovery (72 cases, 72 controls) and a validation (21 cases, 47 controls) cohort.
Results
An association between CN metabolites and sarcopenia showed in mouse and cell studies. In the discovery cohort, plasma C5-CN levels were lower in sarcopenic men (P=0.005). C5-CN levels in men tended to be associated with handgrip strength (HGS) (P=0.098) and were significantly associated with skeletal muscle mass (P=0.003). Each standard deviation increase in C5-CN levels reduced the odds of low muscle mass (odd ratio, 0.61; 95% confidence interval [CI], 0.42 to 0.89). The area under the receiver operating characteristic curve (AUROC) of CN score using a regression equation of C5-CN levels, for sarcopenia was 0.635 (95% CI, 0.544 to 0.726). In the discovery cohort, addition of CN score to HGS significantly improved AUROC from 0.646 (95% CI, 0.575 to 0.717; HGS only) to 0.727 (95% CI, 0.643 to 0.810; P=0.006; HGS+CN score). The improvement was confirmed in the validation cohort (AUROC=0.563; 95% CI, 0.470 to 0.656 for HGS; and AUROC=0.712; 95% CI, 0.569 to 0.855 for HGS+CN score; P=0.027).
Conclusion
C5-CN, indicative of low muscle mass, is a potential circulating biomarker for sarcopenia in men. Further studies are required to confirm these results and explore sarcopenia-related metabolomic changes.
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Miscellaneous
Differences in Type 2 Fiber Composition in the Vastus Lateralis and Gluteus Maximus of Patients with Hip Fractures
Jingwen Tian, Minchul Song, Kyu Jeong Cho, Ho Yeop Lee, Sang Hyeon Ju, Jung Ryul Lim, Ha Thi Nga, Thi Linh Nguyen, Ji Sun Moon, Hyo Ju Jang, Jung-Mo Hwang, Hyon-Seung Yi
Endocrinol Metab. 2024;39(3):521-530.   Published online June 11, 2024
DOI: https://doi.org/10.3803/EnM.2024.1935
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Aging leads to sarcopenia, which is characterized by reduced muscle mass and strength. Many factors, including altered muscle protein turnover, diminished neuromuscular function, hormonal changes, systemic inflammation, and the structure and composition of muscle fibers, play a crucial role in age-related muscle decline. This study explored differences in muscle fiber types contributing to overall muscle function decline in aging, focusing on individuals with hip fractures from falls.
Methods
A pilot study at Chungnam National University Hospital collected muscle biopsies from hip fracture patients aged 20 to 80 undergoing surgical treatment. Muscle biopsies from the vastus lateralis and gluteus maximus were obtained during hip arthroplasty or internal fixation. Handgrip strength, calf and thigh circumference, and bone mineral density were evaluated in individuals with hip fractures from falls. We analyzed the relationships between each clinical characteristic and muscle fiber type.
Results
In total, 26 participants (mean age 67.9 years, 69.2% male) were included in this study. The prevalence of sarcopenia was 53.8%, and that of femoral and lumbar osteoporosis was 19.2% and 11.5%, respectively. Vastus lateralis analysis revealed an age-related decrease in type IIx fibers, a higher proportion of type IIa fibers in women, and an association between handgrip strength and type IIx fibers in men. The gluteus maximus showed no significant correlations with clinical parameters.
Conclusion
This study identified complex associations between age, sex, handgrip strength, and muscle fiber composition in hip fracture patients, offering insights crucial for targeted interventions combating age-related muscle decline and improving musculoskeletal health.

Citations

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  • Tourniquet Use During ACL Reconstruction Is Associated With Postoperative Quadriceps Atrophy and Pain but No Negative Effects in the Long Term: A Systematic Review
    Caleb V. Hayes, Saad M. Ibrahim, Anna E. Crawford, James R. Jones, Mathew D. Hargreaves, Clay A. Rahaman, Eugene W. Brabston, Thomas B. Evely, Aaron J. Casp, Kevin E. Wilk, Amit M. Momaya
    Arthroscopy, Sports Medicine, and Rehabilitation.2024; : 101040.     CrossRef
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Calcium & bone metabolism
Familial Correlation and Heritability of Hand Grip Strength in Korean Adults (Korea National Health and Nutrition Examination Survey 2014 to 2019)
Seong Hee Ahn, Eun Byeol Park, Seongha Seo, Yongin Cho, Da Hea Seo, So Hun Kim, Young Ju Suh, Seongbin Hong
Endocrinol Metab. 2023;38(6):709-719.   Published online November 7, 2023
DOI: https://doi.org/10.3803/EnM.2023.1740
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  • 1 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
The onset and progression of sarcopenia are highly variable among individuals owing to genetic and environmental factors. However, there are a limited number of studies measuring the heritability of muscle strength in large numbers of parent-adult offspring pairs. We aimed to investigate the familial correlation and heritability of hand grip strength (HGS) among Korean adults.
Methods
This family-based cohort study on data from the Korea National Health and Nutrition Examination Survey (2014 to 2019) included 5,004 Koreans aged ≥19 years from 1,527 families. HGS was measured using a digital grip strength dynamometer. Familial correlations of HGS were calculated in different pairs of relatives. Variance component methods were used to estimate heritability.
Results
The heritability estimate of HGS among Korean adults was 0.154 (standard error, 0.066). Correlation coefficient estimates for HGS between parent-offspring, sibling, and spouse pairs were significant at 0.07, 0.10, and 0.23 (P<0.001, P=0.041, and P<0.001, respectively). The total variance in the HGS phenotype was explained by additive genetic (15.4%), shared environmental (11.0%), and unique environmental (73.6%) influences. The odds of weak HGS significantly increased in the offspring of parents with weak HGS (odds ratio [OR], 1.69–3.10; P=0.027–0.038), especially in daughters (OR, 2.04–4.64; P=0.029–0.034).
Conclusion
HGS exhibits a familial correlation and significant heritable tendency in Korean adults. Therefore, Asian adults, especially women, who have parents with weak HGS, need to pay special attention to their muscle health with the help of healthy environmental stimuli.

Citations

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  • Malnutrition and Handgrip Strength are Correlated in Community Dwelling Elderly
    Mehmet Göl, Ayse Elkoca, İbrahim Halil Türkbeyler, Melek Tarakçıoğlu, Alican Çelik, Kazım Ersin Altınsoy
    STED / Sürekli Tıp Eğitimi Dergisi.2024;[Epub]     CrossRef
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Calcium & bone metabolism
Higher Plasma Stromal Cell-Derived Factor 1 Is Associated with Lower Risk for Sarcopenia in Older Asian Adults
Sunghwan Ji, Kyunggon Kim, So Jeong Park, Jin Young Lee, Hee-Won Jung, Hyun Ju Yoo, Il-Young Jang, Eunju Lee, Ji Yeon Baek, Beom-Jun Kim
Endocrinol Metab. 2023;38(6):701-708.   Published online October 18, 2023
DOI: https://doi.org/10.3803/EnM.2023.1783
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Despite the protective effects of stromal cell-derived factor 1 (SDF-1) in stimulating muscle regeneration shown in experimental research, there is a lack of clinical studies linking circulating SDF-1 concentrations with muscle phenotypes. In order to elucidate the role of SDF-1 as a potential biomarker reflecting human muscle health, we investigated the association of plasma SDF-1 levels with sarcopenia in older adults.
Methods
This cross-sectional study included 97 community-dwelling participants who underwent a comprehensive geriatric assessment at a tertiary hospital in South Korea. Sarcopenia was defined by specific cutoff values applicable to the Asian population, whereas plasma SDF-1 levels were determined using an enzyme immunoassay.
Results
After accounting for sex, age, and body mass index, participants with sarcopenia and low muscle mass exhibited plasma SDF-1 levels that were 21.8% and 18.3% lower than those without these conditions, respectively (P=0.008 and P=0.009, respectively). Consistently, higher plasma SDF-1 levels exhibited a significant correlation with higher skeletal muscle mass index (SMI) and gait speed (both P=0.043), and the risk of sarcopenia and low muscle mass decreased by 58% and 55% per standard deviation increase in plasma SDF-1 levels, respectively (P=0.045 and P=0.030, respectively). Furthermore, participants in the highest SDF-1 tertile exhibited significantly higher SMI compared to those in the lowest tertile (P=0.012).
Conclusion
These findings clinically corroborate earlier experimental discoveries highlighting the muscle anabolic effects of SDF- 1 and support the potential role of circulating SDF-1 as a biomarker reflecting human muscle health in older adults.

Citations

Citations to this article as recorded by  
  • Unlocking diagnosis of sarcopenia: The role of circulating biomarkers – A clinical systematic review
    F. Veronesi, F. Salamanna, V. Borsari, A. Ruffilli, C. Faldini, G. Giavaresi
    Mechanisms of Ageing and Development.2024; 222: 112005.     CrossRef
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Miscellaneous
Association between N-Terminal Prohormone Brain Natriuretic Peptide and Decreased Skeletal Muscle Mass in a Healthy Adult Population: A Cross-Sectional Study
Tae Kyung Yoo, Marie Yung-Chen Wu, Moon Soo Kim, Mi-Yeon Lee, Yong-Taek Lee, Kyung Jae Yoon, Chul-Hyun Park
Endocrinol Metab. 2023;38(2):269-276.   Published online March 13, 2023
DOI: https://doi.org/10.3803/EnM.2022.1588
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AbstractAbstract PDFPubReader   ePub   
Background
Although an inverse association between the N-terminal prohormone brain natriuretic peptide (NT-proBNP) and obesity exists, only few major studies have assessed the association between NT-proBNP levels and skeletal muscle mass in asymptomatic healthy adults. Therefore, this cross-sectional study was conducted.
Methods
We assessed participants who underwent health examinations at Kangbuk Samsung Hospital in South Korea from January 2012 to December 2019. Appendicular skeletal muscle mass was measured using a bioelectrical impedance analyzer, and the skeletal muscle mass index (SMI) was calculated. Participants were divided into the control, mildly low skeletal muscle mass (LMM) (−2 standard deviation [SD] < SMI ≤−1 [SD]), and severely LMM groups (SD ≤−2) based on their SMI. The association between elevated NT-proBNP level (≥125 pg/mL) and skeletal muscle mass was assessed using multivariable logistic regression analysis with adjustment for confounding factors.
Results
This study enrolled 15,013 participants (mean age, 37.52±9.52; men, 54.24%; control, n=12,827; mildly LMM, n=1,998; severely LMM, n=188). Prevalence of elevated NT-proBNP was higher in mildly and severely LMM groups than in the control group (control, 1.19%; mildly LMM, 1.4%; severely LMM, 4.26%; P=0.001). The adjusted odds ratio (OR) of elevated NT-proBNP was significantly higher in severely LMM (OR, 2.87; 95% confidence interval [CI], 1.3 to 6.37) than in control (OR, 1.00; reference) or mildly LMM groups (OR, 1.24; 95% CI, 0.81 to 1.89).
Conclusion
Our results showed that NT-proBNP elevation were more prevalent in participants with LMM. In addition, our study showed an association between skeletal muscle mass and NT-proBNP level in a relatively young and healthy adult population.

Citations

Citations to this article as recorded by  
  • Differences in the Evaluation of Malnutrition and Body Composition Using Bioelectrical Impedance Analysis, Nutritional Ultrasound, and Dual-Energy X-ray Absorptiometry in Patients with Heart Failure
    Ana Benitez-Velasco, Carlos Alzas-Teomiro, Carmen Zurera Gómez, Concepción Muñoz Jiménez, José López Aguilera, Manuel Crespin, Juan Antonio Vallejo-Casas, María Ángeles Gálvez-Moreno, María José Molina Puerta, Aura D. Herrera-Martínez
    Nutrients.2024; 16(10): 1535.     CrossRef
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Miscellaneous
Protective Effect of Delta-Like 1 Homolog Against Muscular Atrophy in a Mouse Model
Ji Young Lee, Minyoung Lee, Dong-Hee Lee, Yong-ho Lee, Byung-Wan Lee, Eun Seok Kang, Bong-Soo Cha
Endocrinol Metab. 2022;37(4):684-697.   Published online August 29, 2022
DOI: https://doi.org/10.3803/EnM.2022.1446
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Muscle atrophy is caused by an imbalance between muscle growth and wasting. Delta-like 1 homolog (DLK1), a protein that modulates adipogenesis and muscle development, is a crucial regulator of myogenic programming. Thus, we investigated the effect of exogenous DLK1 on muscular atrophy.
Methods
We used muscular atrophy mouse model induced by dexamethasone (Dex). The mice were randomly divided into three groups: (1) control group, (2) Dex-induced muscle atrophy group, and (3) Dex-induced muscle atrophy group treated with DLK1. The effects of DLK1 were also investigated in an in vitro model using C2C12 myotubes.
Results
Dex-induced muscular atrophy in mice was associated with increased expression of muscle atrophy markers and decreased expression of muscle differentiation markers, while DLK1 treatment attenuated these degenerative changes together with reduced expression of the muscle growth inhibitor, myostatin. In addition, electron microscopy revealed that DLK1 treatment improved mitochondrial dynamics in the Dex-induced atrophy model. In the in vitro model of muscle atrophy, normalized expression of muscle differentiation markers by DLK1 treatment was mitigated by myostatin knockdown, implying that DLK1 attenuates muscle atrophy through the myostatin pathway.
Conclusion
DLK1 treatment inhibited muscular atrophy by suppressing myostatin-driven signaling and improving mitochondrial biogenesis. Thus, DLK1 might be a promising candidate to treat sarcopenia, characterized by muscle atrophy and degeneration.
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Calcium & Bone Metabolism
Decreased Serum Level of Sclerostin in Older Adults with Sarcopenia
Seong Hee Ahn, Hee-Won Jung, Eunju Lee, Ji Yeon Baek, Il-Young Jang, So Jeong Park, Jin Young Lee, Eunah Choi, Yun Sun Lee, Seongbin Hong, Beom-Jun Kim
Endocrinol Metab. 2022;37(3):487-496.   Published online May 27, 2022
DOI: https://doi.org/10.3803/EnM.2022.1428
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  • 13 Web of Science
  • 11 Crossref
AbstractAbstract PDFPubReader   ePub   
Background
Although muscles and bones interact with each other through various secretory factors, the role of sclerostin, an osteocyte-secreted factor, on muscle metabolism has not been well studied. We investigated the levels of serum sclerostin in Korean older adults with sarcopenia.
Methods
Blood samples were collected from 129 participants who underwent evaluation of muscle mass and function in an outpatient geriatric clinic of a teaching hospital. Sarcopenia and related parameters were determined using cutoff values for the Asian population. Serum sclerostin levels were measured using an enzyme-linked immunosorbent assay.
Results
The mean age of the participants was 69.6 years, and 20 participants (15.5%) were classified as having sarcopenia. After adjusting for age, sex, and body mass index, serum sclerostin levels were significantly lower in participants with sarcopenia, low muscle mass, or weak muscle strength (P=0.003 to 0.045). Serum sclerostin levels were positively associated with skeletal muscle index and grip strength after adjusting for confounders (P=0.001 and P=0.003), whereas sarcopenic phenotype score showed a negative association (P=0.006). These increases in muscle mass and strength were also dose dependent as serum sclerostin levels increased (P for trends=0.003 and P for trends=0.015). Higher serum sclerostin levels were associated with lower odds ratio (ORs) for sarcopenia, low muscle mass, and weak muscle strength after adjusting for confounders (OR, 0.27 to 0.50; P<0.001 to 0.025).
Conclusion
Higher serum sclerostin levels were associated with a lower risk of sarcopenia, low muscle mass, and weak muscle strength in Korean older adults.

Citations

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  • Mechanism and physical activities in bone-skeletal muscle crosstalk
    Zhonghan Zhao, Kai Yan, Qiao Guan, Qiang Guo, Can Zhao
    Frontiers in Endocrinology.2024;[Epub]     CrossRef
  • Musculoskeletal disorders and coronary artery disease —promising molecular markers: literature review
    Viktoria N. Karetnikova, Anastasiya G. Neeshpapa, Evgenia I. Carpova, Olga L. Barbarash
    CardioSomatics.2024; 15(1): 55.     CrossRef
  • Differences in Type 2 Fiber Composition in the Vastus Lateralis and Gluteus Maximus of Patients with Hip Fractures
    Jingwen Tian, Minchul Song, Kyu Jeong Cho, Ho Yeop Lee, Sang Hyeon Ju, Jung Ryul Lim, Ha Thi Nga, Thi Linh Nguyen, Ji Sun Moon, Hyo Ju Jang, Jung-Mo Hwang, Hyon-Seung Yi
    Endocrinology and Metabolism.2024; 39(3): 521.     CrossRef
  • Determinants of bone mass in older adults with normal- and overweight derived from the crosstalk with muscle and adipose tissue
    Carina O. Walowski, Catrin Herpich, Janna Enderle, Wiebke Braun, Marcus Both, Mario Hasler, Manfred J. Müller, Kristina Norman, Anja Bosy-Westphal
    Scientific Reports.2023;[Epub]     CrossRef
  • Role of the Osteocyte in Musculoskeletal Disease
    Anika Shimonty, Lynda F. Bonewald, Fabrizio Pin
    Current Osteoporosis Reports.2023; 21(3): 303.     CrossRef
  • The role of sclerostin in lipid and glucose metabolism disorders
    Hewen Jiang, Dijie Li, Ying Han, Nanxi Li, Xiaohui Tao, Jin Liu, Zongkang Zhang, Yuanyuan Yu, Luyao Wang, Sifan Yu, Ning Zhang, Huan Xiao, Xin Yang, Yihao Zhang, Ge Zhang, Bao-Ting Zhang
    Biochemical Pharmacology.2023; 215: 115694.     CrossRef
  • Cytokines and exosomal miRNAs in skeletal muscle–adipose crosstalk
    Liu Guo, Menchus Quan, Weijun Pang, Yulong Yin, Fengna Li
    Trends in Endocrinology & Metabolism.2023; 34(10): 666.     CrossRef
  • Sclerostin: clinical insights in muscle–bone crosstalk
    Antimo Moretti, Giovanni Iolascon
    Journal of International Medical Research.2023;[Epub]     CrossRef
  • Anti-sclerostin antibodies: a new frontier in fragility fractures treatment
    Giovanni Iolascon, Sara Liguori, Marco Paoletta, Giuseppe Toro, Antimo Moretti
    Therapeutic Advances in Musculoskeletal Disease.2023;[Epub]     CrossRef
  • Sclerostin as a Putative Myokine in Sarcopenia
    Hyon-Seung Yi
    Endocrinology and Metabolism.2022; 37(3): 430.     CrossRef
  • Organokines, Sarcopenia, and Metabolic Repercussions: The Vicious Cycle and the Interplay with Exercise
    Giulia Minniti, Letícia Maria Pescinini-Salzedas, Guilherme Almeida dos Santos Minniti, Lucas Fornari Laurindo, Sandra Maria Barbalho, Renata Vargas Sinatora, Lance Alan Sloan, Rafael Santos de Argollo Haber, Adriano Cressoni Araújo, Karina Quesada, Jesse
    International Journal of Molecular Sciences.2022; 23(21): 13452.     CrossRef
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Calcium & Bone Metabolism
Association between Elevated Plasma Homocysteine and Low Skeletal Muscle Mass in Asymptomatic Adults
Jae-Hyeong Choi, Jin-Woo Seo, Mi-Yeon Lee, Yong-Taek Lee, Kyung Jae Yoon, Chul-Hyun Park
Endocrinol Metab. 2022;37(2):333-343.   Published online February 8, 2022
DOI: https://doi.org/10.3803/EnM.2021.1202
  • 9,647 View
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  • 8 Web of Science
  • 10 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Homocysteine has been drawing attention with a closed linkage with skeletal muscle. However, the association of hyperhomocysteinemia with decreased skeletal muscle mass remains unclear. We aimed to investigate the association of hyperhomocysteinemia with low skeletal muscle mass (LMM) in asymptomatic adults.
Methods
This was a cross-sectional study of 114,583 community-dwelling adults without cancer, stroke, or cardiovascular diseases who underwent measurements of plasma homocysteine and body composition analysis from 2012 to 2018. Hyperhomocysteinemia was defined as >15 μmol/L. Skeletal muscle mass index (SMI) was calculated based on appendicular muscle mass (kg)/height (m)2. Participants were classified into three groups based on SMI: “normal,” “mildly low,” and “severely low.”
Results
The prevalence of hyperhomocysteinemia was the highest in subjects with severely LMM (12.9%), followed by those with mildly LMM (9.8%), and those with normal muscle mass (8.5%) (P for trend <0.001). In a multivariable logistic regression model, hyperhomocysteinemia was significantly associated with having a mildly LMM (odds ratio [OR], 1.305; 95% confidence interval [CI], 1.224 to 1.392) and severely LMM (OR, 1.958; 95% CI, 1.667 to 2.286), respectively. One unit increment of log-transformed homocysteine was associated with 1.360 and 2.169 times higher risk of having mildly LMM and severely LMM, respectively.
Conclusion
We demonstrated that elevated homocysteine has an independent association with LMM in asymptomatic adults, supporting that hyperhomocysteinemia itself can be a risk for decline in skeletal musculature.

Citations

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  • The role of the mitochondrial trans-sulfuration in cerebro-cardio renal dysfunction during trisomy down syndrome
    Sathnur Pushpakumar, Mahavir Singh, Utpal Sen, N. Tyagi, Suresh C. Tyagi
    Molecular and Cellular Biochemistry.2024; 479(4): 825.     CrossRef
  • Association of vitamins B1 and B2 intake with early-onset sarcopenia in the general adult population of the US: a cross-sectional study of NHANES data from 2011 to 2018
    Sha Yang, Zhenyu Dong, Jiaqi Zhao, Lijia Yuan, Yao Xiao, Xing Luo, Zhuyang Zhao, Xia Kang, Kanglai Tang, Ming Chen, Liu Feng
    Frontiers in Nutrition.2024;[Epub]     CrossRef
  • Differences in Type 2 Fiber Composition in the Vastus Lateralis and Gluteus Maximus of Patients with Hip Fractures
    Jingwen Tian, Minchul Song, Kyu Jeong Cho, Ho Yeop Lee, Sang Hyeon Ju, Jung Ryul Lim, Ha Thi Nga, Thi Linh Nguyen, Ji Sun Moon, Hyo Ju Jang, Jung-Mo Hwang, Hyon-Seung Yi
    Endocrinology and Metabolism.2024; 39(3): 521.     CrossRef
  • Impact of Hyperhomocysteinemia on Cytokine and Matrix Metalloproteinases Contents in Rat Skeletal Muscle
    Olha Kravchenko, Raksha Nataliia, Kostiuk Oleksandra, Liashevska Oleksandra, Tiron Oksana, Maievskyi Oleksandr
    Biomedical and Biotechnology Research Journal.2024; 8(3): 387.     CrossRef
  • The Relevance of Plant-Based Diets and Micronutrient Supplementation for Body Composition: Data from the VeggieNutri Cross-Sectional Study
    Cátia Pinheiro, Flávia Silva, Inês Rocha, Carina Martins, Liliana Giesteira, Bruna Dias, Ana Lucas, Ana Margarida Alexandre, Catarina Ferreira, Bruna Viegas, Isabella Bracchi, Juliana Guimarães, Joana Amaro, Teresa F. Amaral, Cláudia Camila Dias, Andreia
    Nutrients.2024; 16(19): 3322.     CrossRef
  • The unique presentation of the relationship between red blood cell folate and appendicular skeletal muscle mass: a cross-sectional study
    Liangchuan Zhang, Yating Peng, Yuan Kong, Xue Zhang, Zetian Li, Hong Jia
    Scientific Reports.2024;[Epub]     CrossRef
  • Association of Triglyceride-Glucose Index with the Risk of Hyperhomocysteinemia Among Chinese Male Bus Drivers: A Longitudinal Study
    Juan Xiong, Yanxia Wu, Lingling Huang, Xujuan Zheng
    International Journal of General Medicine.2023; Volume 16: 2857.     CrossRef
  • Relationship between hyperhomocysteinemia and coexisting obesity with low skeletal muscle mass in asymptomatic adult population
    Tae Kyung Yoo, Hye Chang Rhim, Yong-Taek Lee, Kyung Jae Yoon, Chul-Hyun Park
    Scientific Reports.2022;[Epub]     CrossRef
  • Causal effects of homocysteine levels on the components of sarcopenia: A two-sample mendelian randomization study
    Hongwei Yu, Gan Luo, Tianwei Sun, Qiong Tang
    Frontiers in Genetics.2022;[Epub]     CrossRef
  • Association between serum homocysteine and sarcopenia among hospitalized older Chinese adults: a cross-sectional study
    Bing Lu, Lingyu Shen, Haiqiong Zhu, Ling Xi, Wei Wang, Xiaojun Ouyang
    BMC Geriatrics.2022;[Epub]     CrossRef
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Calcium & Bone Metabolism
Comparison of Two DXA Systems, Hologic Horizon W and GE Lunar Prodigy, for Assessing Body Composition in Healthy Korean Adults
Seung Shin Park, Soo Lim, Hoyoun Kim, Kyoung Min Kim
Endocrinol Metab. 2021;36(6):1219-1231.   Published online December 16, 2021
DOI: https://doi.org/10.3803/EnM.2021.1274
  • 6,101 View
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  • 8 Web of Science
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Dual-energy X-ray absorptiometry (DXA) is the most widely used method for evaluating muscle masses. The aim of this study was to investigate the agreement between muscle mass values assessed by two different DXA systems.
Methods
Forty healthy participants (20 men, 20 women; age range, 23 to 71 years) were enrolled. Total and regional body compositional values for fat and lean masses were measured consecutively with two DXA machines, Hologic Horizon and GE Lunar Prodigy. Appendicular lean mass (ALM) was calculated as the sum of the lean mass of four limbs.
Results
In both sexes, the ALM values measured by the GE Lunar Prodigy (24.8±4.3 kg in men, 15.8±2.9 kg in women) were significantly higher than those assessed by Hologic Horizon (23.0±4.0 kg in men, 14.8±3.2 kg in women). Furthermore, BMI values or body fat (%), either extremely higher or lower levels, contributed greater differences between two systems. Bland-Altman analyses revealed a significant bias between ALM values assessed by the two systems. Linear regression analyses were performed to develop equations to adjust for systematic differences (men: Horizon ALM [kg]=0.915×Lunar Prodigy ALM [kg]+0.322, R2=0.956; women: Horizon ALM [kg]=1.066×Lunar Prodigy ALM [kg]–2.064, R2=0.952).
Conclusion
Although measurements of body composition including muscle mass by the two DXA systems correlated strongly, significant differences were observed. Calibration equations should enable mutual conversion between different DXA systems.

Citations

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  • Glycaemic Response to a Nut-Enriched Diet in Asian Chinese Adults with Normal or High Glycaemia: The Tū Ora RCT
    Ivana R. Sequeira-Bisson, Louise W. Lu, Marta P. Silvestre, Lindsay D. Plank, Nikki Middleditch, Alejandra Acevedo-Fani, Amber Parry-Strong, Kieren G. Hollingsworth, Alexander Tups, Jennifer L. Miles-Chan, Jeremy D. Krebs, Meika Foster, Sally D. Poppitt
    Nutrients.2024; 16(13): 2103.     CrossRef
  • The usefulness of total body protein mass models for adolescent athletes
    Analiza M. Silva, Francesco Campa, Luís B. Sardinha
    Frontiers in Nutrition.2024;[Epub]     CrossRef
  • Standardization of body composition parameters between GE Lunar iDXA and Hologic Horizon A and their clinical impact
    Colin Vendrami, Guillaume Gatineau, Elena Gonzalez Rodriguez, Olivier Lamy, Didier Hans, Enisa Shevroja
    JBMR Plus.2024;[Epub]     CrossRef
  • Impaired Muscle Parameters in Individuals With Premature Ovarian Insufficiency: A Pilot Study
    Navira Samad, Wei Ling Chiu, Hanh H Nguyen, Zhong X Lu, Margaret Zacharin, Peter R Ebeling, Helena Teede, David Scott, Frances Milat, Amanda J Vincent
    Journal of the Endocrine Society.2024;[Epub]     CrossRef
  • Comparison of bioelectrical impedance analysis and dual-energy X-ray absorptiometry for the diagnosis of sarcopenia in the older adults with metabolic syndrome: equipment-specific equation development
    Younji Kim, Jaewon Beom, Sang Yoon Lee, Hak Chul Jang, Keewon Kim, Miji Kim, Ga Yang Shim, Chang Won Won, Jae-Young Lim
    Aging Clinical and Experimental Research.2024;[Epub]     CrossRef
  • Total and regional appendicular skeletal muscle mass prediction from dual-energy X-ray absorptiometry body composition models
    Cassidy McCarthy, Grant M. Tinsley, Anja Bosy-Westphal, Manfred J. Müller, John Shepherd, Dympna Gallagher, Steven B. Heymsfield
    Scientific Reports.2023;[Epub]     CrossRef
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    Mícheál Ó Breasail, Ramatoulie Janha, Ayse Zengin, Camille Pearse, Landing Jarjou, Ann Prentice, Kate A. Ward
    Calcified Tissue International.2023; 112(5): 573.     CrossRef
  • Estimation of Absolute and Relative Body Fat Content Using Noninvasive Surrogates: Can DXA Be Bypassed?
    David J. Greenblatt, Christopher D. Bruno, Jerold S. Harmatz, Bess Dawson‐Hughes, Qingchen Zhang, Chunhui Li, Christina R. Chow
    The Journal of Clinical Pharmacology.2023;[Epub]     CrossRef
Close layer
Calcium & Bone Metabolism
Computed Tomography-Derived Skeletal Muscle Radiodensity Is an Early, Sensitive Marker of Age-Related Musculoskeletal Changes in Healthy Adults
Yeon Woo Jung, Namki Hong, Joon Chae Na, Woong Kyu Han, Yumie Rhee
Endocrinol Metab. 2021;36(6):1201-1210.   Published online December 13, 2021
DOI: https://doi.org/10.3803/EnM.2021.1206
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
A decrease in computed tomography (CT)-derived skeletal muscle radiodensity (SMD) reflects age-related ectopic fat infiltration of muscle, compromising muscle function and metabolism. We investigated the age-related trajectory of SMD and its association with vertebral trabecular bone density in healthy adults.
Methods
In a cohort of healthy adult kidney donors aged 19 to 69 years (n=583), skeletal muscle index (SMI, skeletal muscle area/height2), SMD, and visceral-to-subcutaneous fat (V/S) ratio were analyzed at the level of L3 from preoperative CT scans. Low bone mass was defined as an L1 trabecular Hounsfield unit (HU) <160 HU.
Results
L3SMD showed constant decline from the second decade (annual change –0.38% and –0.43% in men and women), whereas the decline of L3SMI became evident only after the fourth decade of life (–0.37% and –0.18% in men and women). One HU decline in L3SMD was associated with elevated odds of low bone mass (adjusted odds ratio, 1.07; 95% confidence interval, 1.02 to 1.13; P=0.003), independent of L3SMI, age, sex, and V/S ratio, with better discriminatory ability compared to L3SMI (area under the receiver-operating characteristics curve 0.68 vs. 0.53, P<0.001). L3SMD improved the identification of low bone mass when added to age, sex, V/S ratio, and L3SMI (category-free net reclassification improvement 0.349, P<0.001; integrated discrimination improvement 0.015, P=0.0165).
Conclusion
L3SMD can be an early marker for age-related musculoskeletal changes showing linear decline throughout life from the second decade in healthy adults, with potential diagnostic value for individuals with low bone mass.

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  • Changes in thoracic radio density after living donor liver transplantation
    Atsushi Miki, Yasunaru Sakuma, Yukihiro Sanada, Jun Watanabe, Yasuharu Onishi, Noriki Okada, Toshio Horiuchi, Takahiko Omameuda, Takumi Teratani, Alan K. Lefor, Joji Kitayama, Naohiro Sata
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  • The Impact of Persevering Home Full-Body In-Bed Gym Exercise on Body Muscles in Aging: A Case Report by Quantitative Radio-Densitometric Study Using 3D and 2D Color CT
    Riccardo Forni, Paolo Gargiulo, Gabriele Boretti, Marco Quadrelli, Tommaso Baccaglini, Aldo Morra, Barbara Ravara, Sandra Zampieri, Amber Pond, Ugo Carraro, Maria Chiara Maccarone, Stefano Masiero
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    James W. Wang, Jiarong Chen, Alison H. McGregor, Matthew Williams
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    Kyoung Jin Kim, Serhim Son, Kyeong Jin Kim, Sin Gon Kim, Nam Hoon Kim
    Journal of Cachexia, Sarcopenia and Muscle.2023; 14(5): 2196.     CrossRef
Close layer
Adrenal Gland
Aldosterone Inhibits In Vitro Myogenesis by Increasing Intracellular Oxidative Stress via Mineralocorticoid Receptor
Jin Young Lee, Da Ae Kim, Eunah Choi, Yun Sun Lee, So Jeong Park, Beom-Jun Kim
Endocrinol Metab. 2021;36(4):865-874.   Published online July 30, 2021
DOI: https://doi.org/10.3803/EnM.2021.1108
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AbstractAbstract PDFPubReader   ePub   
Background
Despite clinical evidence indicating poor muscle health in subjects with primary aldosteronism (PA), it is still unclear whether the role of aldosterone in muscle metabolism is direct or mediated indirectly via factors, such as electrolyte imbalance or impaired glucose uptake. As one approach to clarify this issue, we investigated the effect of aldosterone on in vitro myogenesis and the potential mechanism explaining it.
Methods
Myogenesis was induced in mouse C2C12 myoblasts with 2% horse serum. Immunofluorescence, quantitative reversetranscription polymerase chain reaction, Western blot, viability, and migration analyses were performed for experimental research.
Results
Recombinant aldosterone treatment suppressed muscle differentiation from mouse C2C12 myoblasts in a dose-dependent manner, and consistently reduced the expression of myogenic differentiation markers. Furthermore, aldosterone significantly increased intracellular reactive oxygen species (ROS) levels in myotubes, and treatment with N-acetyl cysteine, a potent biological thiol antioxidant, reversed the decrease of myotube area, myotube area per myotube, nucleus number per myotube, and fusion index due to aldosterone through decreasing oxidative stress. A binding enzyme-linked immunosorbent assay confirmed that mineralocorticoid receptor (MR) interacted with aldosterone in C2C12 myoblasts, while eplerenone, an MR inhibitor, blocked aldosterone-stimulated intracellular ROS generation during myogenesis and markedly attenuated the suppression of in vitro myogenesis by aldosterone.
Conclusion
These findings support the hypothesis that hypersecretion of aldosterone, like PA, directly contributes to muscular deterioration and suggest that antioxidants and/or MR antagonists could be effective therapeutic options to reduce the risk of sarcopenia in these patients.

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  • Molecular mechanisms underlying sarcopenia in heart failure
    Cody A. Rutledge
    The Journal of Cardiovascular Aging.2024;[Epub]     CrossRef
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    Jorge E. Aedo, Rodrigo Zuloaga, Daniela Aravena-Canales, Alfredo Molina, Juan Antonio Valdés
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    Yasuhiro Izumiya
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    Jeonghoon Ha, Jung Hwan Park, Kyoung Jin Kim, Jung Hee Kim, Kyong Yeun Jung, Jeongmin Lee, Jong Han Choi, Seung Hun Lee, Namki Hong, Jung Soo Lim, Byung Kwan Park, Jung-Han Kim, Kyeong Cheon Jung, Jooyoung Cho, Mi-kyung Kim, Choon Hee Chung
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    Sunghwan Ji, Kyunggon Kim, So Jeong Park, Jin Young Lee, Hee-Won Jung, Hyun Ju Yoo, Il-Young Jang, Eunju Lee, Ji Yeon Baek, Beom-Jun Kim
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  • The Role of Aldosterone in OSA and OSA-Related Hypertension
    Yi Wang, Chuan Xiang Li, Ying Ni Lin, Li Yue Zhang, Shi Qi Li, Liu Zhang, Ya Ru Yan, Fang Ying Lu, Ning Li, Qing Yun Li
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    Daiji Kawanami, Yuichi Takashi, Yoshimi Muta, Naoki Oda, Dai Nagata, Hiroyuki Takahashi, Makito Tanabe
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Close layer
Review Article
Diabetes, Obesity and Metabolism
Receptor-Mediated Muscle Homeostasis as a Target for Sarcopenia Therapeutics
Jong Hyeon Yoon, Ki-Sun Kwon
Endocrinol Metab. 2021;36(3):478-490.   Published online June 28, 2021
DOI: https://doi.org/10.3803/EnM.2021.1081
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AbstractAbstract PDFPubReader   ePub   
Sarcopenia is a disease characterized by age-related decline of skeletal muscle mass and function. The molecular mechanisms of the pathophysiology of sarcopenia form a complex network due to the involvement of multiple interconnected signaling pathways. Therefore, signaling receptors are major targets in pharmacological strategies in general. To provide a rationale for pharmacological interventions for sarcopenia, we herein describe several druggable signaling receptors based on their role in skeletal muscle homeostasis and changes in their activity with aging. A brief overview is presented of the efficacy of corresponding drug candidates under clinical trials. Strategies targeting the androgen receptor, vitamin D receptor, Insulin-like growth factor-1 receptor, and ghrelin receptor primarily focus on promoting anabolic action using natural ligands or mimetics. Strategies involving activin receptors and angiotensin receptors focus on inhibiting catabolic action. This review may help to select specific targets or combinations of targets in the future.

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Close layer
Original Articles
Diabetes, Obesity and Metabolism
Reference Values for Skeletal Muscle Mass at the Third Lumbar Vertebral Level Measured by Computed Tomography in a Healthy Korean Population
Ja Kyung Yoon, Sunyoung Lee, Kyoung Won Kim, Ji Eun Lee, Jeong Ah Hwang, Taeyong Park, Jeongjin Lee
Endocrinol Metab. 2021;36(3):672-677.   Published online June 8, 2021
DOI: https://doi.org/10.3803/EnM.2021.1041
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  • 14 Crossref
AbstractAbstract PDFPubReader   ePub   
Background
Sarcopenia is defined as the loss of skeletal muscle mass and is associated with negative clinical outcomes. This study aimed to establish sex-specific cutoff values for the skeletal muscle area (SMA) and skeletal muscle index (SMI) at the third lumbar vertebral (L3) level using computed tomography (CT) imaging to identify sarcopenia in healthy Korean liver donors.
Methods
This retrospective study included 659 healthy liver donors (408 men and 251 women) aged 20 to 60 years who had undergone abdominal CT examinations between January 2017 and December 2018. Assessment of body composition was performed with an automated segmentation technique using a deep-learning system. Sex-specific SMA and SMI distributions were assessed, and cutoff values for determining sarcopenia were defined as values at either two standard deviations (SDs) below the mean reference value or below the fifth percentile.
Results
Using the SD definition, cutoff values for SMA and SMI were 117.04 cm2 and 39.33 cm2/m2, respectively, in men and 71.39 cm2 and 27.77 cm2/m2, respectively, in women. Using the fifth percentile definition, cutoff values for SMA and SMI were 126.88 cm2 and 40.96 cm2/m2, respectively, in men and 78.85 cm2 and 30.60 cm2/m2, respectively, in women.
Conclusion
Our data provide sex-specific cutoff values for the SMA and SMI at the L3 level measured by CT imaging in a healthy Korean population, which may be applicable for identifying sarcopenia in this population.

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    Jie Chen, Yue Li, Chengjie Li, Turun Song
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    Valerio Nardone, Alfonso Reginelli, Vittorio Patanè, Angelo Sangiovanni, Roberta Grassi, Anna Russo, Pierpaolo Correale, Diego Sandro Giordano, Carmine Zaccaria, Maria Paola Belfiore, Salvatore Cappabianca
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    Oana-Elena Branea, Sanda Maria Copotoiu, Diana Andreea Becica, AnaMaria Romina Budeanu, Razvan Gabriel Budeanu, Mihai Emanuel Becica, Dragos Constantin Cucoranu, Septimiu Voidazan, Monica Chis, Alexandra Elena Lazar
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Close layer
Endocrine Research
Effect of CCL11 on In Vitro Myogenesis and Its Clinical Relevance for Sarcopenia in Older Adults
Da Ae Kim, So Jeong Park, Jin Young Lee, Jeoung Hee Kim, Seungjoo Lee, Eunju Lee, Il-Young Jang, Hee-Won Jung, Jin Hoon Park, Beom-Jun Kim
Endocrinol Metab. 2021;36(2):455-465.   Published online April 14, 2021
DOI: https://doi.org/10.3803/EnM.2020.942
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  • 5 Web of Science
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
The C-C motif chemokine ligand 11 (CCL11) has been receiving attention as a potential pro-aging factor. Accordingly, it may be involved in muscle metabolism and sarcopenia, a key component of aging phenotypes. To clarify this potential, we investigated the effects of CCL11 on in vitro muscle biology and its clinical relevance for sarcopenia parameters in older adults.
Methods
Myogenesis was induced in mouse C2C12 myoblasts with 2% horse serum. Human blood samples were collected from 79 participants who underwent a functional assessment. Thereafter, CCL11 level was measured using a quantikine ELISA kit. Sarcopenia was defined using the Asian-specific guideline.
Results
Recombinant CCL11 treatment significantly stimulated myogenesis in a dose-dependent manner, and consistently increased the expression of myogenic differentiation markers. Among the C-C chemokine receptors (CCRs), CCR5, not CCR2 and CCR3, was predominantly expressed in muscle cells. Further, the CCR5 inhibitor blocked recombinant CCL11-stimulated myogenesis. In a clinical study, serum CCL11 level was not significantly different according to the status of sarcopenia, low muscle mass, weak muscle strength, and poor physical performance, and was not associated with skeletal muscle index, grip strength, short physical performance battery score, gait speed, and time to complete 5 chair stands, after adjusting for sex, age, and body mass index.
Conclusion
Contrary to expectations, CCL11 exerted beneficial effects on muscle metabolism at least in vitro system. However, its impact on human muscle health was not evident, suggesting that circulating CCL11 may not be a useful biomarker for sarcopenia risk assessment in older adults.

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    Mingchong Liu, Xiao Fu, Daqian Yu, Meng Li, Yutao Pan, Chensong Yang, Guixin Sun
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  • C–C motif chemokine CCL11 is a novel regulator and a potential therapeutic target in non-alcoholic fatty liver disease
    Zhiwen Fan, Xinyue Sun, Xuelian Chen, Huimin Liu, Xiulian Miao, Yan Guo, Yong Xu, Jie Li, Xiaoping Zou, Zilong Li
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  • Lumican Inhibits Osteoclastogenesis and Bone Resorption by Suppressing Akt Activity
    Jin-Young Lee, Da-Ae Kim, Eun-Young Kim, Eun-Ju Chang, So-Jeong Park, Beom-Jun Kim
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Close layer
Review Article
Miscellaneous
Sarcopenia and Muscle Aging: A Brief Overview
Tam Dao, Alexander E. Green, Yun A Kim, Sung-Jin Bae, Ki-Tae Ha, Karim Gariani, Mi-ra Lee, Keir J. Menzies, Dongryeol Ryu
Endocrinol Metab. 2020;35(4):716-732.   Published online December 23, 2020
DOI: https://doi.org/10.3803/EnM.2020.405
  • 32,270 View
  • 1,590 Download
  • 108 Web of Science
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AbstractAbstract PDFPubReader   ePub   
The world is facing the new challenges of an aging population, and understanding the process of aging has therefore become one of the most important global concerns. Sarcopenia is a condition which is defined by the gradual loss of skeletal muscle mass and function with age. In research and clinical practice, sarcopenia is recognized as a component of geriatric disease and is a current target for drug development. In this review we define this condition and provide an overview of current therapeutic approaches. We further highlight recent findings that describe key pathophysiological phenotypes of this condition, including alterations in muscle fiber types, mitochondrial function, nicotinamide adenine dinucleotide (NAD+) metabolism, myokines, and gut microbiota, in aged muscle compared to young muscle or healthy aged muscle. The last part of this review examines new therapeutic avenues for promising treatment targets. There is still no accepted therapy for sarcopenia in humans. Here we provide a brief review of the current state of research derived from various mouse models or human samples that provide novel routes for the development of effective therapeutics to maintain muscle health during aging.

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