Aferição da circunferência da panturrilha no rastreio da sarcopenia em idosos / Assessment of the scope circumference in the screening of sarcopenia in elderly people / Medición de la circunferencia de la pantorrilla en el cribado de sarcopenia en ancianos

Objetivo: Analisar a prática do enfermeiro da atenção primária à saúde acerca da aferição da circunferência da panturrilha no rastreio da sarcopenia em idosos. Métodos: Estudo descritivo de abordagem qualitativa, realizado com enfermeiros que atuam na atenção primária à saúde. As entrevistas foram realizadas mediante utilização de roteiro semiestruturado, nos meses de maio a julho de 2019. Resultados: Participaram do estudo 24 enfermeiros com idade média de 31,4 anos, predominantemente do sexo feminino. O tempo de formação dos participantes variou de cinco meses a 15 anos e, a maioria dos entrevistados relatou possuir pós-graduação (n=18), principalmente nas áreas de saúde da família e urgência e emergência. A maioria não utilizava em sua prática diária a avaliação da circunferência da panturrilha e alguns a realizavam apenas em idosos hipertensos e diabéticos. Conclusão: Há uma escassa utilização da aferição da circunferência da panturrilha na prática clínica do enfermeiro, o que compromete o rastreio da sarcopenia, e consequentemente dificulta a realização de ações que minimizam as complicações desta doença. (AU)

Objective: To analyze the practice of nurses in primary health care about measuring the circumference of the calf in screening for sarcopenia in the elderly. Methods: Descriptive study with a qualitative approach, carried out with nurses who work in primary health care. The interviews were conducted using a semi-structured script, from May to July 2019. Results: 24 nurses with a mean age of 31.4 years, predominantly female, participated in the study. Participants' training time ranged from five months to 15 years, and most respondents reported having a postgraduate degree (n=18), mainly in the areas of family health and urgency and emergency. Most did not use calf circumference assessment in their daily practice and some performed it only in hypertensive and diabetic elderly. Conclusion: There is little use of calf circumference measurement in clinical nursing practice, which compromises sarcopenia screening and, consequently, makes it difficult to carry out actions that minimize the complications of this disease. (AU)

Objetivo: Analizar la práctica de enfermeras de atención primaria de salud sobre la medición de la circunferencia de la pantorrilla en el cribado de sarcopenia en el anciano. Métodos: Estudio descriptivo con abordaje cualitativo, realizado con enfermeras que laboran en la atención primaria de salud. Las entrevistas se realizaron mediante un guión semiestructurado, de mayo a julio de 2019. Resultados: Participaron del estudio 24 enfermeras con una edad promedio de 31,4 años, predominantemente mujeres. El tiempo de formación de los participantes osciló entre cinco meses y 15 años, y la mayoría de los encuestados informó tener un título de posgrado (n = 18), principalmente en las áreas de salud familiar y urgencia y emergencia. La mayoría no utilizó la evaluación de la circunferencia de la pantorrilla en su práctica diaria y algunos la realizaron solo en ancianos hipertensos y diabéticos. Conclusión: La medición del perímetro de la pantorrilla es escasa en la práctica clínica de enfermería, lo que compromete el cribado de sarcopenia y, en consecuencia, dificulta la realización de acciones que minimicen las complicaciones de esta enfermedad. (AU)

Standing-Long-Jump Test Application in Identifying Female Adolescents at Risk of Sarcopenic Obesity / Aplicación de la Prueba de Salto de Longitud de Pie para Identificar a Adolescentes con Riesgo de Obesidad Sarcopénica

SUMMARY: The identification of children and adolescents who are at risk of sarcopenic obesity development often requires specialized equipment and expensive test procedures. Therefore, the establishment of cheaper and faster methods would be greatly useful, especially if they could be applied in the field. The study's objective was to establish if identification of female adolescents who suffer the risk of developing sarcopenic obesity can be obtained through the standing-long-jump test application. To achieve the research objectives, various anthropometric and body composition measurements were performed and lower limb explosive strength was assessed using the standing long jump fitness test. The research was conducted on a sample of 535 female respondents randomly selected from 9 elementary schools in the Skopje region of the Republic of North Macedonia. The respondents were divided into quintiles according to BMI z-scores, and the arithmetic means and SD about muscle-to-fat ratio were calculated for each quintile. The cutoff was determined based on the mean and standard deviation of the muscle-to-fat ratio for the 3rd quintile of BMI and the percentage of respondents with sarcopenic obesity was examined. The optimal cut-off value of the long jump fitness test results for predicting sarcopenic obesity in an adolescent girl showed that the area under the ROC curve was 0.781 (95 % CI 0.743-0.815). The standing-long-jump test values, on grounds of odds ratio (OR 95 % CI) about the girls at risk of sarcopenic obesity development, which was identified on muscle-to-fat ratio base, were 8.76 (4.39 - 17.54, p 0.001). It can be used to predict sarcopenic obesity presence in female adolescents, which can be vital in case of health intervention.

La identificación de niños y adolescentes que corren riesgo de desarrollar obesidad sarcopénica a menudo requiere equipos especializados y procedimientos de pruebas costosos. Por lo tanto, el establecimiento de métodos más baratos y rápidos sería de gran utilidad, especialmente si pudieran aplicarse en el campo. El objetivo del estudio fue establecer si la identificación de mujeres adolescentes que sufren riesgo de desarrollar obesidad sarcopénica se puede obtener mediante la aplicación de la prueba de salto de longitud de pie. Para lograr los objetivos de la investigación, se realizaron diversas mediciones antropométricas y de composición corporal y se evaluó la fuerza explosiva de los miembros inferiores mediante la prueba de aptitud de salto de longitud de pie. La investigación se realizó con una muestra de 535 mujeres encuestadas seleccionadas al azar de 9 escuelas primarias de la región de Skopje, en la República de Macedonia del Norte. Los encuestados se dividieron en quintiles según las puntuaciones z del IMC, y se calcularon las medias aritméticas y la DE sobre la relación músculo-grasa para cada quintil. El límite se determinó en función de la media y la desviación estándar de la relación músculo-grasa para el tercer quintil del IMC y se examinó el porcentaje de encuestados con obesidad sarcopénica. El valor de corte óptimo de los resultados de la prueba de condición física de salto de longitud para predecir la obesidad sarcopénica en una adolescente mostró que el área bajo la curva ROC fue 0,781 (IC del 95 %: 0,743-0,815). Los valores de la prueba de salto de longitud de pie, sobre la base del odds ratio (OR IC del 95 %) sobre las niñas en riesgo de desarrollar obesidad sarcopénica, que se identificó sobre la base del ratio músculo-grasa, fueron 8,76 (4,39 - 17,54, p. 0,001). Puede utilizarse para predecir la presencia de obesidad sarcopénica en adolescentes, lo que puede ser vital en caso de intervención sanitaria.

Dimensions of quality of life in patients with heart failure and sarcopenia: a scoping review protocol / Dimensões da qualidade de vida em pacientes com insuficiência cardíaca e sarcopenia: um protocolo de revisão de escopo

Objective: To map the dimensions of quality of life in patients with heart failure (HF) and sarcopenia. Methods: The scoping review will adhere to the JBI Manual for Evidence Synthesis methodology and will be reported following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR). Searches will encompass MEDLINE/PubMed, SCOPUS, EMBASE/Elsevier, LILACS, IBECS, BDENF (BVS), SciELO, Core Collection (Clarivate Analytics), CINAHL, Academic Search Premier (EBSCO), PsycINFO (APA), Cochrane Library, Epistemonikos, and academic search engines: Google Scholar and Bielefeld Academic Search Engine (BASE), without language or date restrictions. Inclusion criteria: Population ­ adults with HF and sarcopenia; Concept ­ Dimensions of quality of life including mobility, self-care, usual activities, pain/discomfort, and anxiety/depression ­ defined based on the EQ-5D-3L questionnaire; Context ­ any health care setting. Two independent reviewers will select studies and extract data, with a third reviewer consulted in cases of discrepancies. Findings will be presented graphically with a narrative summary. Expected results: We aim to uncover key dimensions of quality of life in individuals with HF and sarcopenia through this scoping review. Anticipated outcomes include insights into mobility, self-care, usual activities, pain/discomfort, and anxiety/depression across diverse health care settings. Relevance: This review sheds light on the interplay between HF and sarcopenia and its impact on quality of life. The findings may guide interventions, inform evidence-based decision-making, and contribute to targeted strategies to improve the wellbeing of individuals managing both conditions. Review registration: Open Science Framework [https://archive.org/details/osf-registrations-jn387-v1]. (AU)

Interrelationship of Sarcopenia and Cardiovascular Diseases: A review of potential mechanisms and management / Journal of the ASEAN Federation of Endocrine Societies

@#Sarcopenia refers to an age-related reduction of lean body mass. It showed a reciprocal relationship with cardiovascular diseases. Thus, it is imperative to explore pathophysiological mechanisms explaining the relationship between sarcopenia and cardiovascular diseases, along with the clinical assessment, and associated management. In this review, we discuss how processes such as inflammation, oxidative stress, endothelial dysfunction, neural and hormonal modifications, as well as other metabolic disturbances influence sarcopenia as well as its association with cardiovascular diseases. Moreover, this review provides an overview of both non-pharmacological and pharmacological management for patients with sarcopenia and cardiovascular diseases, with a focus on the potential role of cardiovascular drugs to mitigate sarcopenia.

The roles of non-pharmacologic and emerging pharmacologic management of non-alcoholic fatty liver disease and sarcopenia: A narrative review / Journal of the ASEAN Federation of Endocrine Societies

@#Non-alcoholic fatty liver disease (NAFLD) is one of the most prevalent causes of chronic liver disease worldwide which is often seen in patients with metabolic abnormalities such as those with obesity and insulin resistance. On the other hand, sarcopenia is a generalized and progressive skeletal muscle disorder characterized by low muscle strength, low muscle quality, low physical performance, or a combination of the three. Both disease entities share several underlying risk factors and pathophysiologic mechanisms. These include: (1) cardiometabolic overlaps such as insulin resistance, chronic systemic inflammation, decreased vitamin D levels, sex hormone modifications; (2) muscle-related factors such as those mitigated by myostatin signaling, and myokines (i.e., irisin); and (3) liver-dysfunction related factors such as those associated with growth hormone/insulin-like growth factor 1 Axis, hepatokines (i.e., selenoprotein P and leukocyte cell-derived chemotaxin-2), fibroblast growth factors 21 and 19 (FGF21 and FGF19), and hyperammonemia. This narrative review will examine the pathophysiologic overlaps that can explain the links between NAFLD and sarcopenia. Furthermore, this review will explore the emerging roles of nonpharmacologic (e.g., weight reduction, diet, alcohol, and smoking cessation, and physical activity) and pharmacologic management (e.g., roles of β-hydroxy-β-methylbutyrate, branched-chain amino acid supplements, and testosterone therapy) to improve care, intervention sustainability, and acceptability for patients with sarcopenia-associated NAFLD.

Avaliação do risco de sarcopenia em pacientes diabéticos tipo 2 / Assessment of the risk of sarcopenia in individuals with type 2 diabetes

Introdução: Diabéticos podem apresentar perda de força e massa muscular de forma acentuada. Assim, as triagens SARC-F e SARC-CALF são úteis na investigação do risco de sarcopenia. Objetivo: Associar o risco de sarcopenia em pacientes diabéticos com as variáveis sociodemográficas, econômicas, clínicas, antropométricas e de estilo de vida. Método: Estudo do tipo série de casos realizado com adultos diabéticos tipo 2, de ambos os sexos, com idade entre 20 e 59 anos. A avaliação do risco de sarcopenia se deu pela aplicação dos questionários SARC-F e SARC-CALF. Para caracterização da amostra e associação com o risco de sarcopenia, foram coletados dados sociodemográficos e econômicos, medidas antropométricas, condições clínicas e estilo de vida. Resultados: A amostra foi composta por 69 pacientes, com média de idade de 53±7,5 anos e maior proporção de mulheres (63,8%; IC95%: 50,7-75,4). A frequência do risco positivo para sarcopenia segundo o SARC-F e o SARC-CALF foi de 43,48% e 46,38%, respectivamente. O SARC-F não mostrou associação significativa com as variáveis estudadas; já o SARC-CALF associou-se com índice de massa corporal (p <0,001), circunferência da cintura (p <0,001) e hábito de fumar (p = 0,027). Conclusão: O risco de sarcopenia foi observado em aproximadamente metade dos pacientes avaliados. O instrumento SARC-CALF apresentou associação com as variáveis antropométricas e o hábito de fumar, podendo ser considerado satisfatório para avaliar o risco de sarcopenia e intervir de forma precoce e efetiva.

Introduction: Individuals with diabetes often experience an accentuated loss of muscle mass and strength. Thus, the SARC-F and SARC-CALF screening tools are useful for the investigation of the risk of sarcopenia. Objective: Associate the risk of sarcopenia with sociodemographic, economic, clinical, anthropometric and lifestyle variables in individuals with diabetes. Methods: A case-series study was conducted involving male and female adults with type 2 diabetes between 20 and 59 years of age. The assessment of the risk of diabetes was performed using the SARC-F and SARC-CALF instruments. Data were collected on sociodemographic-economic variables, anthropometric measures, clinical conditions and lifestyle for the characterization of the sample and to test associations with the risk of sarcopenia. Results: The sample was composed of 69 patients, with a mean age of 53 ± 7.5 years and a predominance of women (63.8%; 95%CI: 50.7-75.4). The prevalence of risk of sarcopenia was 43.48% and 46.38% based on the SARC-F and SARC-CALF, respectively. Using the SARC-F, no significant associations were found with the variables of interest. Using the SARC-CALF, however, the risk of sarcopenia was associated with body mass index (p < 0.001), waist circumference (p < 0.001) and smoking habit (p = 0.027). Conclusion: Approximately half of the individuals analyzed were at risk of sarcopenia. The SARC-CALF questionnaire was associated with anthropometric variables and the smoking habit and can be considered adequate for the assessment of the risk of sarcopenia, enabling early, effective interventions.

Skeletal muscle mass obtained by anthropometric equation and presence of sarcopenia in postmenopausal women

Abstract Objective: To analyze the amount of muscle and the presence of sarcopenia in postmenopausal women using different methods, verifying the agreement between them as to skeletal muscle mass (SMM). Methods: This cross-sectional observational study was conducted with postmenopausal women aged ≥ 50 years. SMM was obtained from a predictive equation, Bioelectrical Impedance (BIA), and Dual Energy X-Ray Absorptiometry (DXA). The skeletal muscle mass index (SMI) and the appendicular skeletal muscle mass index (ASMI) were calculated. The cut-off point of SMI was determined for the population itself. The agreement between the SMI obtained using the different methods was verified. Sarcopenia was diagnosed according to the criteria proposed by the European Working Group on Sarcopenia in Older People 2 (EWGSOP2). The significance level adopted for all tests was 5.0%. Results: A total of 112 women were evaluated, with an average age of 66.1 ± 5.65 years. Among them, 51.8% were sufficiently active and 43.8% were overweight and obese. The SMI cut-offs were 6.46 kg/m2 for the predictive equation and 7.66 kg/m2 for BIA, with high sensitivity and specificity. There was an excellent agreement in the identification of SMM by the predictive equation (0.89 [0.824-0.917], p < 0.001) and BIA (0.92 [0.883-0.945], p < 0.001), in reference to DXA. The prevalence of sarcopenia was 0.9%, 1.8%, and 2.7% according to BIA, DXA, and the predictive equation, respectively. Conclusion: The predictive equation showed the expected agreement in estimating skeletal muscle mass in postmenopausal women, offering a viable and accurate alternative.

Application of Global Leadership Initiative on Malnutrition criteria in patients with liver cirrhosis / 中华医学杂志(英文版)

BACKGROUND@#The Global Leadership Initiative on Malnutrition (GLIM) criteria were published to build a global consensus on nutritional diagnosis. Reduced muscle mass is a phenotypic criterion with strong evidence to support its inclusion in the GLIM consensus criteria. However, there is no consensus regarding how to accurately measure and define reduced muscle mass in clinical settings. This study aimed to investigate the optimal reference values of skeletal muscle mass index for diagnosing sarcopenia and GLIM-defined malnutrition, as well as the prevalence of GLIM-defined malnutrition in hospitalized cirrhotic patients.@*METHODS@#This retrospective study was conducted on 1002 adult patients with liver cirrhosis between January 1, 2018, and February 28, 2022, at Beijing You-An Hospital, Capital Medical University. Adult patients with a clinical diagnosis of liver cirrhosis and who underwent an abdominal computed tomography (CT) examination during hospitalization were included in the study. These patients were randomly divided into a modeling group (cohort 1, 667 patients) and a validation group (cohort 2, 335 patients). In cohort 1, optimal cut-off values of skeletal muscle index at the third lumbar skeletal muscle index (L3-SMI) were determined using receiver operating characteristic analyses against in-hospital mortality in different gender groups. Next, patients in cohort 2 were screened for nutritional risk using the Nutritional Risk Screening 2002 (NRS-2002), and malnutrition was diagnosed by GLIM criteria. Additionally, the reference values of reduced muscle mass in GLIM criteria were derived from the L3-SMI values from cohort 1. Multivariate logistic regression analysis was used to analyze the association between GLIM-defined malnutrition and clinical outcomes.@*RESULTS@#The optimal cut-off values of L3-SMI were 39.50 cm 2 /m 2 for male patients and 33.06 cm 2 /m 2 for female patients. Based on the cut-off values, 31.63% (68/215) of the male patients and 23.3% (28/120) of the female patients had CT-determined sarcopenia in cohort 2. The prevalence of GLIM-defined malnutrition in cirrhotic patients was 34.3% (115/335) and GLIM-defined malnutrition was an independent risk factor for in-hospital mortality in patients with liver cirrhosis ( Wald = 6.347, P  = 0.012).@*CONCLUSIONS@#This study provided reference values for skeletal muscle mass index and the prevalence of GLIM-defined malnutrition in hospitalized patients with liver cirrhosis. These reference values will contribute to applying the GLIM criteria in cirrhotic patients.

Deep learning-based radiomics allows for a more accurate assessment of sarcopenia as a prognostic factor in hepatocellular carcinoma / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

Hepatocellular carcinoma (HCC) is one of the most common malignancies and is a major cause of cancer-related mortalities worldwide (Forner et al., 2018; He et al., 2023). Sarcopenia is a syndrome characterized by an accelerated loss of skeletal muscle (SM) mass that may be age-related or the result of malnutrition in cancer patients (Cruz-Jentoft and Sayer, 2019). Preoperative sarcopenia in HCC patients treated with hepatectomy or liver transplantation is an independent risk factor for poor survival (Voron et al., 2015; van Vugt et al., 2016). Previous studies have used various criteria to define sarcopenia, including muscle area and density. However, the lack of standardized diagnostic methods for sarcopenia limits their clinical use. In 2018, the European Working Group on Sarcopenia in Older People (EWGSOP) renewed a consensus on the definition of sarcopenia: low muscle strength, loss of muscle quantity, and poor physical performance (Cruz-Jentoft et al., 2019). Radiological imaging-based measurement of muscle quantity or mass is most commonly used to evaluate the degree of sarcopenia. The gold standard is to measure the SM and/or psoas muscle (PM) area using abdominal computed tomography (CT) at the third lumbar vertebra (L3), as it is linearly correlated to whole-body SM mass (van Vugt et al., 2016). According to a "North American Expert Opinion Statement on Sarcopenia," SM index (SMI) is the preferred measure of sarcopenia (Carey et al., 2019). The variability between morphometric muscle indexes revealed that they have different clinical relevance and are generally not applicable to broader populations (Esser et al., 2019).

Síndrome de la Fragilidad y sarcopenia en ancianos con y sin diabetes mellitus tipo 2 del municipio de Sinop, Mato Grosso: un estudio epidemiológico / Frailty Syndrome and sarcopenia in older adults with and without type 2 diabetes mellitus in the municipality of Sinop, Mato Grosso: an epidemiological study / Síndrome da Fragilidade e sarcopenia em idosos com e sem diabetes mellitus tipo 2 do município de Sinop, Mato Grosso: um estudo epidemiológico

Objetivo: relacionar el Síndrome de la Fragilidad y la sarcopenia en ancianos con y sin diabetes mellitus tipo 2; e identificar los potenciales factores de riesgo para la fragilidad y sarcopenia. Método: estudio epidemiológico descriptivo realizado en 140 ancianos del municipio de Sinop, Mato Grosso, Brasil. Para evaluar el Síndrome de la Fragilidad se utilizó el fenotipo de fragilidad y para la evaluación de la sarcopenia el cuestionario de evaluación física con medida de la circunferencia de la pantorrilla. Resultados: en lo que se refiere al Síndrome de la Fragilidad se obtuvo un mayor porcentaje para ancianos con diabetes mellitus tipo 2, cuando comparados con aquellos sin la enfermedad (p = 0,00). En relación a la presencia de sarcopenia, los ancianos con y sin diabetes mellitus tipo 2 presentaron valores semejantes, sin significación estadística (p = 0,74). El Síndrome de la Fragilidad presentó asociación con: inactividad física (IC95%: 3,29-56,55); intervalo etario superior a 75 años (IC95%: 3,30-27,82); baja renta familiar (IC95%: 1,80-50,98); y, comorbilidades (IC95%: 4,9-5,4). Entre tanto, la sarcopenia fue asociada a la presencia de la inactividad física (IC95%: 1,26-10,44), al bajo peso/eutrófico (IC95%: 3,32- 26,76) y a la desnutrición/riesgo nutricional (IC95%: 1,30-7,70), en los ancianos con y sin diabetes mellitus tipo 2. Conclusión: los ancianos diabéticos tienen mayor vulnerabilidad para desarrollar el Síndrome de Fragilidad, lo que requiere la adopción de medidas preventivas en la atención primaria a la salud.

Objective: to relate Frailty Syndrome and sarcopenia in older adults with and without type 2 diabetes mellitus and identify potential risk factors for frailty and sarcopenia. Method: this descriptive epidemiological study was conducted with 140 older adults in the municipality of Sinop, Mato Grosso, Brazil. The frailty phenotype was used for the assessment of Frailty Syndrome, and a physical assessment questionnaire with calf circumference measurement was used for the assessment of sarcopenia. Results: regarding Frailty Syndrome, a higher percentage was observed in older adults with type 2 diabetes mellitus compared to those without the disease (p = 0.00). Concerning the presence of sarcopenia, older adults with and without type 2 diabetes mellitus showed similar values, with no statistical significance (p = .74). Frailty Syndrome was associated with physical inactivity (95%CI: 3.29-56.55), age over 75 years (95%CI: 3.30- 27.82), low family income (95%CI: 1.80-50.98), and comorbidities (95%CI: 4.90-5.40). However, sarcopenia was associated with the presence of physical inactivity (95%CI: 1.26-10.44), low weight/ eutrophic (95%CI: 3.32-26.76), and malnutrition/nutritional risk (95%CI: 1.30-7.70) for older adults with and without type 2 diabetes mellitus. Conclusion: older adults with diabetes have a higher vulnerability to develop Frailty Syndrome, necessitating the adoption of preventive measures in primary healthcare.

Objetivo: relacionar a Síndrome da Fragilidade e a sarcopenia em idosos com e sem diabetes mellitus tipo 2; e identificar os potenciais fatores de risco para fragilidade e sarcopenia. Método: estudo epidemiológico descritivo realizado com 140 idosos do município de Sinop, Mato Grosso, Brasil. Para a avaliação da Síndrome da Fragilidade, utilizou-se o fenótipo de fragilidade, e, para a avaliação da sarcopenia, o questionário de avaliação física com medida de circunferência da panturrilha. Resultados: quanto à Síndrome da Fragilidade, obteve-se maior percentual para idosos com diabetes mellitus tipo 2 quando comparado àqueles sem a doença (p = 0,00). Em relação à presença de sarcopenia, os idosos com e sem diabetes mellitus tipo 2 apresentaram valores semelhantes, sem significância estatística (p = 0,74). Síndrome da Fragilidade apresentou associação com inatividade física (IC95%: 3,29-56,55), faixa etária superior a 75 anos (IC95%: 3,30-27,82), baixa renda familiar (IC95%: 1,80-50,98) e comorbidades (IC95%: 4,9-5,4). Entretanto, a sarcopenia foi associada à presença da inatividade física (IC95%: 1,26-10,44), baixo peso/eutrófico (IC95%: 3,32-26,76) e desnutrição/risco nutricional (IC95%: 1,30-7,70) para os idosos com e sem diabetes mellitus tipo 2. Conclusão: os idosos diabéticos têm maior vulnerabilidade para desenvolver a Síndrome de Fragilidade, requerendo a adoção de medidas preventivas na atenção primária à saúde.

Marcadores bioquímicos propuestos para el estudio de la sarcopenia / Proposed biochemical markers for the study of sarcopenia

La sarcopenia asociada a la edad es una condición clínica caracterizada por una disminución en la fuerza, calidad y cantidad de masa muscular así como también en la función muscular. Un biomarcador se define como una característica que es medible objetivamente y evaluable como indicador de un proceso biológico normal, patológico o respuesta terapéutica a una intervención farmacológica. Los marcadores bioquímicos propuestos para el estudio de la sarcopenia pueden ser categorizados en dos grupos. El primero de ellos evalúa el estatus musculoesquelético; este panel de marcadores está formado por miostatina/folistatina, procolágeno aminoterminal tipo III e índice de sarcopenia. El segundo grupo de marcadores bioquímicos evalúa factores causales, para lo cual se sugiere medir el factor de crecimiento insulino-símil tipo 1 (IGF-1), dehidroepiandrosterona (DHEAS), cortisol, facto-res inflamatorios [proteína C reactiva (PCR), interleuquina 6 (IL-6) y factor de necrosis tu-moral (TNF-a)]. Las recomendaciones realiza-das están basadas en la evidencia científica disponible en la actualidad y la disponibilidad de la metodología apropiada para cada uno de los biomarcadores. (AU)

Sarcopenia is a progressive and generalized skeletal muscle disorder defined by decrease in the strength, quality and quantity of muscle mass as well as in muscle function. A biomarker is defined as a feature objectively measured and evaluated as an indicator of a normal biologic process, a pathogenic process or a pharmacologic response to therapeutic intervention. The biochemical markers proposed for the study of sarcopenia may be classified in two groups. The first group evaluates the musculoskeletal status, made up by myostatin/follistatin, N-terminal Type III Procollagen and the sarcopenia index. The second evaluates causal factors, where the measurement of the following is suggested: hormones insulin-like growth factor-1 (IGF-I), dehydroepiandrosterone sulphate (DHEAS), cortisol, inflammatory factors [C-reactive protein (CRP), interleukin-6 (IL-6), and tumor necrosis factor-a (TNF-a)]. The recommendations made are based on scientific evidence currently available and the appropriate methodology availability for each biomarker. (AU)

Sarcopenia em pacientes de 40 a 64 anos hospitalizados por insuficiência cardíaca / Sarcopenia in patients aged 40­64 years hospitalized for heart failure

Introdução: a insuficiência cardíaca (IC) e a sarcopenia são condições prevalentes e inter-relacionadas, figurando como importantes causas de limitações funcionais. Objetivo: avaliar critérios de sarcopenia, e suas relações com parâmetros cardiometabólicos, em pacientes de 40 a 64 anos hospitalizados por IC. Metodologia: estudo de corte transversal com caráter analítico envolvendo indivíduos com IC confirmada. A massa muscular apendicular (MMA) foi avaliada através da absorciometria por raios-X de dupla energia (DXA), considerando-se baixa MMA mulheres com MMA/altura² <5,5 kg/m² ou MMA/índice de massa corporal (IMC) <0,512 e homens com MMA/altura² <7,0 kg/m² ou MMA/IMC <0,789. Baixa força de preensão manual (FPM) foi considerada quando <16 kg em mulheres e <27 kg em homens. Resultados: avaliou-se 109 pacientes (50,5% mulheres), com mediana de idade de 58 anos. Constatou-se baixa MMA em 41,3% e baixa FPM em 64,2%, não havendo correlação significativa entre FPM e MMA em nenhum dos gêneros. Baixa MMA se associou ao gênero masculino (68,9% versus 35,9%; p=0,001), a maiores idades (60,0 [53,0-63,0] versus 57,0 [51,3-60,0] anos; p=0,039) e maiores níveis séricos de paratormônio (48,0 [30,5-94,4] versus 29,9 [23,0-54,1] pg/mL; p=0,009). Baixa FPM se associou a maior sintomatologia cardíaca (75,7% com baixa FPM tinham classificação funcional da New York Heart Association III-IV, versus 51,3% daqueles com FPM normal; p=0,009). Conclusões: há uma relevante prevalência de sarcopenia em pacientes de 40 a 64 anos hospitalizados por IC, observando-se maior frequência de baixa MMA nos homens, associação entre baixa FPM e sintomatologia cardíaca, e maiores níveis de paratormônio naqueles com perda muscular.

Introduction: heart failure (HF) and sarcopenia are prevalent and interrelated conditions, being important causes of functional limitations. Objective: to evaluate sarcopenia criteria, and their relationship with cardiometabolic parameters, in patients aged 40­64 years hospitalized for HF. Methodology: Cross-sectional study including patients with established HF. Appendicular skeletal muscle mass (ASMM) was assessed using dual-energy X-ray absorptiometry (DXA), considering low ASMM women with ASMM/height² <5.5 kg/m² or ASMM/body mass index (BMI) <0.512 and men with ASMM/height² <7.0 kg/m² or ASMM/BMI <0.789. Low handgrip strength (HGS) was considered when <16 kg in women and <27 kg in men. Results: we evaluated 109 patients (50.5% women), with a median age of 58 years. Low ASMM was found in 41.3% and low HGS in 64.2%, with no significant correlation between HGS and ASMM in either gender. Low ASMM was associated with male gender (68.9% versus 35.9%; p=0.001), older age (60.0 [53.0-63.0] versus 57.0 [51.3-60, 0] years; p=0.039) and higher serum parathyroid hormone (48.0 [30.5-94.4] versus 29.9 [23.0-54.1] pg/mL; p=0.009). Low HGS was associated with greater cardiac symptoms (75.7% with low HGS had a New York Heart Association III-IV functional classification, versus 51.3% of those with normal HGS; p=0.009). Conclusions: there is a relevant prevalence of sarcopenia in patients aged 40­64 years hospitalized for HF, observing a higher frequency of low ASMM in men, an association between low HGS and cardiac symptoms, and higher levels of parathyroid hormone in those with muscle wasting.

Use of the SARC-F Score as an Aid in Fragility Fractures Prevention / O uso do escore SARC-F como auxiliar na prevenção de fraturas por fragilidade

Abstract Objective The present study aimed to relate the strength, assistance with walking, rising from a chair, climbing stairs, and falls (SARC-F) score with the presence or absence of fragility fracture in the population over 60 years of age. Methods The risk of sarcopenia was determined through the application of the SARC-F questionnaire, and the patients were divided into 2 groups, according to the occurrence or not of fragility fracture (n = 100). Results Thirty-two cases of distal radius fractures and eighteen cases of proximal femur fractures were identified. A higher score on the SARC-F is determinant between having or not a fragility fracture, estimating that for each point in the score there is a 70% increase in the chance of a patient having a fracture, regardless of age, gender, and body mass index (BMI). Conclusion There was a direct correlation between a higher score on the SARC-F and an increase in the chance of fragility fracture.

Resumo Objetivo O presente estudo teve como objetivo relacionar o escore strength, assistance with walking, rising from a chair, climbing stairs, and falls (SARC-F) com a presença ou não de fratura por fragilidade na população acima de 60 anos. Métodos O risco de sarcopenia foi determinado por meio da aplicação do questionário SARC-F, sendo os pacientes divididos em 2 grupos, de acordo com a ocorrência ou não de fratura por fragilidade (n = 100). Resultados Foram levantados 32 casos de fratura de rádio distal e 18 casos de fratura de fêmur proximal. Uma maior pontuação no SARC-F determina bem entre ter ou não ter fratura por fragilidade, estimando que a cada ponto a mais no escore há um acréscimo de 70% na chance de o paciente ter fratura, independentemente da idade, sexo e índice de massa corporal (IMC). Conclusão Houve correlação direta entre uma maior pontuação no SARC-F e aumento na chance de fratura por fragilidade.

Nutrition impact symptoms, sarcopenia, and malnutrition in hospitalized patients / Sintomas de impacto nutricional, sarcopenia e desnutrição em pacientes hospitalizados

INTRODUCTION: Nutrition Impact Symptoms (NIS) are common in hospitalized patients and can be aggravated in the presence of malnutrition. OBJECTIVE: To verify the presence of NIS and its association with sociodemographic and clinical variables, sarcopenia phenotype, and nutritional status of individuals hospitalized. METHODS: This is a cross-sectional study with hospitalized patients, of both sexes and ≥50 years old. Patient-Generated Subjective Global Assessment (PG-SGA), handgrip strength (HGS), gait speed GS), and anthropometric measurements were performed up to 48 hours after admission. NIS was obtained through PG-SGA and stratified into two groups: <3 and ≥3 symptoms. The chi-square test (χ2) was performed, and a 5% significance level was adopted. RESULTS: A total of 90 patients (65.4±9.67 years) were studied, with the majority of men (56.7%), older people (70.0%), married (68.9%), low economic class (72.2%), without work activity (70.5%), with two previous diseases (60.0%), overweight by body mass index (46.7%) and adequate adductor pollicis muscle thickness (83.3%). The most prevalent NIS were "dry mouth", "anorexia", and "smells sick" respectively 31.1%, 30.0%, and 16.7%. There was an association between NIS and SARC-F score (p=0.002), handgrip strength (p=0.016), the status of sarcopenia (p=0.020), PG-SGA (p<0.001), and economic status (p=0.020). CONCLUSION: The identification of NIS is common, and may infer negative nutritional status and functional performance of patients. The use of protocols to identify NIS during hospitalization should be considered to minimize the negative impact on nutritional status.

INTRODUÇÃO: Sintomas de impacto nutricional (SIN) são comuns em pacientes hospitalizados e estes podem ser agravados na presença da desnutrição. OBJETIVO: Verificar a presença de SIN e sua associação com as variáveis sociodemográficas, clínicas, fenótipo de sarcopenia e estado nutricional de indivíduos hospitalizados. MÉTODOS: Trata-se de estudo transversal com pacientes internados, de ambos os sexos e idade ≥ 50 anos. Realizou-se Avaliação Subjetiva Global produzida pelo Paciente (ASG-PPP), força de preensão palmar (FPP), velocidade de caminhada (VC) e medidas antropométricas até 48 horas da admissão. Os SIN foram obtidos por meio da ASG-PPP e compilados em <3 ou ≥3 sintomas. Realizou-se o teste de qui-quadrado (χ2). Adotou-se nível de significância de 5%. RESULTADOS: Um total de 90 pacientes (65,4±9,67 anos), sendo a maioria homem (56,7%), idoso (70,0%), casado (68,9%), classe econômica baixa (72,2%), sem atividade de trabalho (70,5%), com uma a duas doenças pregressas (60,0%), excesso de peso ao índice de massa corporal (46,7%) e adequada espessura do músculo adutor do polegar (83,3%). Os SIN "boca seca", "anorexia" e "cheiros enjoam" foram os mais prevalentes, respectivamente 31,1%, 30,0% e 16,7%. Houve associação dos SIN com as variáveis que compõem o fenótipo de sarcopenia: o escore SARC-F (p=0,002) e FPP (p=0,016), status de sarcopenia (p=0,020), ASG-PPP (p<0,001) e classe econômica (p=0,020). CONCLUSÃO: A identificação de SIN é comum, podendo inferir negativamente no estado nutricional e desempenho funcional dos pacientes. Considerar o uso de protocolos para identificação dos SIN durante a hospitalização a fim de minimizar a repercussão negativa no estado nutricional.

Research progress of sarcopenic obesity and chronic liver disease / 中华肝脏病杂志

Sarcopenia has attracted increasing attention with the study of nutrition in patients with liver disease. Sarcopenia is an independent risk factor for a poor prognosis of liver disease and is becoming increasingly common in patients with liver disease. Studies have shown that patients with liver disease and sarcopenic obesity have a worse prognosis than patients with liver disease and simple sarcopenia or obesity. In clinical practice, it is easy to recognize patients with malnutrition and decreased muscle mass, but we often ignore those patients with normal body weight or even obesity who will likewise experience muscle mass loss. Simply relying on the monitoring of body mass and body mass index to assess the nutritional and muscle status of patients with liver disease is not accurate. At present, our understanding of the relationship between chronic liver disease and sarcopenic obesity is still poorly understood. In this paper, the research progress on chronic liver disease, sarcopenia, and sarcopenic obesity in recent years is reviewed so as to provide a theoretical basis for improving the clinical prognosis of patients with liver disease.

Sarcopenia, chronic pain, and perceived health of older: a cross-sectional study / Sarcopenia, dor crônica e percepção de saúde do idoso: um estudo transversal

Abstract Introduction Aging is a dynamic and progressive process that can be associated with the presence of morbidities, such as chronic diseases, and functional decline, characteristic of sarcopenia, which directly affects the self-perceived health of the older. Objective To test the hypothesis that there is an association between sarcopenia, chronic pain, and perceived health in the older. Methods The study used a quantitative approach and enrolled 43 sarcopenic elderly individuals registered in the University of The Third Age Program (UATI) at Universidade do Estado da Bahia, in Brazil, between November and December 2019. Data included patients' sociodemographic and anthropometric characteristics, self-reported morbidities, multimorbidity, history of chronic pain and perceived health. The data were subjected to descriptive statistical analyses. Crossing of data was performed using Pearson's chi-square test, and the correlation coefficient was assessed using Cramer's Phi and V tests. Results There was an association of sarcopenia with chronic pain (p = 0.027) and with age group (p = 0.016), however not with perceived health (p = 0.09). There was also no association between age range and chronic pain (p > 0.05). Conclusion According to the findings of this study, it can be concluded that sarcopenia is associated with the presence of chronic pain and the age of the elderly, not being associated with the perception of health. However, the age of the elderly was not associated with the presence of chronic pain.

Resumo Introdução O envelhecimento é um processo dinâmico e progressivo que pode estar associado à presença de morbidades, como doenças crônicas, e ao declínio funcional, característico da sarcopenia, que afeta diretamente a autopercepção de saúde do idoso. Objetivo Testar a hipótese de que existe associação entre sarcopenia, dor crônica e percepção de saúde em idosos. Métodos O estudo utilizou uma abordagem quantitativa e envolveu 43 idosos sarcopênicos cadastrados na Universidade Aberta da Terceira Idade (UATI) da Universidade do Estado da Bahia, no Brasil, entre novembro e dezembro de 2019. Dados incluíram características sociodemográficas e antropométricas dos pacientes, morbidades autorreferidas, multimorbidade, história de dor crônica e percepção de saúde. Os dados foram submetidos a análises estatísticas descritivas. O cruzamento dos dados foi feito pelo teste de qui-quadrado de Pearson e o coeficiente de correlação foi avaliado pelos testes Phi e V de Cramer. Resultados Houve associação da sarcopenia com dor crônica (p = 0,027) e com faixa etária (p = 0,016), porém não houve associação com a percepção de saúde (p = 0,09). Também não houve associação entre faixa etária e dor crônica (p > 0,05). Conclusão De acordo com os achados deste estudo, pode-se concluir que a sarcopenia está associada à presença de dor crônica e à idade do idoso, não estando associada à percepção de saúde. No entanto, a idade dos idosos não foi associada à presença de dor crônica.

Utilidad de la medición de los músculos psoas y paraespinales mediante tomografía computarizada y resonancia magnética / Usefulness of the measurement of the psoas and paraspinal muscles by computed tomography and magnetic resonance

Introducción: La sarcopenia está revistiendo importancia en el estudio de diferentes enfermedades para predecir la morbimortalidad en el perioperatorio. Los objetivos de este estudio fueron evaluar la eficacia de la tomografía y la resonancia en la medición de la musculatura del psoas y los paraespinales, y comparar estos índices con la edad, el sexo y la enfermedad. materiales y métodos: Se utilizaron las tomografías computarizadas y las resonancias magnéticas de pacientes ambulatorios. La medición de los músculos se realizó en los pedículos de L3 y L4. Resultados: El estudio incluyó 18 tomografías y 34 resonancias. El rango de edad de los pacientes era de 15 a 80 años, divididos en grupos etarios. En los promedios globales, en ambos estudios, el sexo masculino estaba por encima del promedio global. Con respecto a los rangos etarios, se observó que el primer grupo (15-29 años) tenía un mayor volumen muscular y de unidades Hounsfield en el psoas comparado con el grupo >60 años. Los pacientes que consultaron por espondilolistesis tenían menos masa muscular que aquellos con discopatías. Conclusiones: No existe diferencia entre la resonancia magnética y la tomografía computarizada en cuanto a la medición de los músculos paraespinales y psoas. Queda en evidencia que la disminución del volumen muscular es común en pacientes de mayor edad y con enfermedades que afectan el balance espinal. Nivel de Evidencia: IV

background: Sarcopenia is becoming increasingly significant in the research of various diseases to predict morbidity and mortal-ity in the perioperative period. Objectives: The objectives of this study were to evaluate the efficacy of computed tomography and magnetic resonance imaging in measuring the psoas and paraspinal muscles and to compare these indexes with age, sex, and pathology. materials and methods: Computed tomography and magnetic resonance imaging of outpatients were used. Muscle measurements were taken at the L3 and L4 pedicles. Results: The study included 18 CT and 34 MRI scans. The patients were divided into groups based on their age range, which was 15 to 80 years. In the overall averages, males were above the global average in both studies. Regarding age ranges, it was observed that the first group (15-29 years) had a higher muscle volume and Hounsfield units in the psoas compared to the >60 age group. Patients consulting for spondylolisthesis had less muscle mass than those with discopathy. Conclusions: There is no difference between magnetic resonance imaging and computed tomography in measuring the paraspinal and psoas muscles. It is evident that the decrease in muscle volume is common in older patients and those with diseases that affect spinal balance. Level of Evidence: IV

Cholic and deoxycholic acids induce mitochondrial dysfunction, impaired biogenesis and autophagic flux in skeletal muscle cells

BACKGROUND: Skeletal muscle is sensitive to bile acids (BA) because it expresses the TGR5 receptor for BA. Cholic (CA) and deoxycholic (DCA) acids induce a sarcopenia-like phenotype through TGR5-dependent mechanisms. Besides, a mouse model of cholestasis-induced sarcopenia was characterised by increased levels of serum BA and muscle weakness, alterations that are dependent on TGR5 expression. Mitochondrial alterations, such as decreased mitochondrial potential and oxygen consumption rate (OCR), increased mitochondrial reactive oxygen species (mtROS) and unbalanced biogenesis and mitophagy, have not been studied in BA-induced sarcopenia.METHODS: We evaluated the effects of DCA and CA on mitochondrial alterations in C2C12 myotubes and a mouse model of cholestasis-induced sarcopenia. We measured mitochondrial mass by TOM20 levels and mitochondrial DNA; ultrastructural alterations by transmission electronic microscopy; mitochondrial biogenesis by PGC-1α plasmid reporter activity and protein levels by western blot analysis; mitophagy by the co-localisation of the MitoTracker and LysoTracker fluorescent probes; mitochondrial potential by detecting the TMRE probe signal; protein levels of OXPHOS complexes and LC3B by western blot analysis; OCR by Seahorse measures; and mtROS by MitoSOX probe signals. RESULTS: DCA and CA caused a reduction in mitochondrial mass and decreased mitochondrial biogenesis. Interestingly, DCA and CA increased LC3II/LC3I ratio and decreased autophagic flux concordant with raised mitophagosome-like structures. In addition, DCA and CA decreased mitochondrial potential and reduced protein levels in OXPHOS complexes I and II. The results also demonstrated that DCA and CA decreased basal, ATP-linked, FCCP-induced maximal respiration and spare OCR. DCA and CA also reduced the number of cristae. In addition, DCA and CA increased the mtROS. In mice with cholestasis-induced sarcopenia, TOM20, OXPHOS complexes I, II and III, and OCR were diminished. Interestingly, the OCR and OXPHOS complexes were correlated with muscle strength and bile acid levels. CONCLUSION: Our results showed that DCA and CA decreased mitochondrial mass, possibly by reducing mitochondrial biogenesis, which affects mitochondrial function, thereby altering potential OCR and mtROS generation. Some mitochondrial alterations were also observed in a mouse model of cholestasis-induced sarcopenia characterised by increased levels of BA, such as DCA and CA.

Ursodeoxycholic acid induces sarcopenia associated with decreased protein synthesis and autophagic flux

BACKGROUND: Skeletal muscle generates force and movements and maintains posture. Under pathological conditions, muscle fibers suffer an imbalance in protein synthesis/degradation. This event causes muscle mass loss and decreased strength and muscle function, a syndrome known as sarcopenia. Recently, our laboratory described secondary sarcopenia in a chronic cholestatic liver disease (CCLD) mouse model. Interestingly, the administration of ursodeoxycholic acid (UDCA), a hydrophilic bile acid, is an effective therapy for cholestatic hepatic alterations. However, the effect of UDCA on skeletal muscle mass and functionality has never been evaluated, nor the possible involved mechanisms. METHODS: We assessed the ability of UDCA to generate sarcopenia in C57BL6 mice and develop a sarcopenic-like phenotype in C2C12 myotubes and isolated muscle fibers. In mice, we measured muscle strength by a grip strength test, muscle mass by bioimpedance and mass for specific muscles, and physical function by a treadmill test. We also detected the fiber's diameter and content of sarcomeric proteins. In C2C12 myotubes and/or isolated muscle fibers, we determined the diameter and troponin I level to validate the cellular effect. Moreover, to evaluate possible mechanisms, we detected puromycin incorporation, p70S6K, and 4EBP1 to evaluate protein synthesis and ULK1, LC3 I, and II protein levels to determine autophagic flux. The mitophagosome-like structures were detected by transmission electron microscopy. RESULTS: UDCA induced sarcopenia in healthy mice, evidenced by decreased strength, muscle mass, and physical function, with a decline in the fiber's diameter and the troponin I protein levels. In the C2C12 myotubes, we observed that UDCA caused a reduction in the diameter and content of MHC, troponin I, puromycin incorporation, and phosphorylated forms of p70S6K and 4EBP1. Further, we detected increased levels of phosphorylated ULK1, the LC3II/LC3I ratio, and the number of mitophagosome-like structures. These data suggest that UDCA induces a sarcopenic-like phenotype with decreased protein synthesis and autophagic flux. CONCLUSIONS: Our results indicate that UDCA induces sarcopenia in mice and sarcopenic-like features in C2C12 myotubes and/or isolated muscle fibers concomitantly with decreased protein synthesis and alterations in autophagic flux.