Association between Circulating Osteoprogenitor Cells and Sarcopenia

Gerontology ◽  
2021 ◽  
pp. 1-6
Author(s):  
Ahmed Al Saedi ◽  
Steven Phu ◽  
Sara Vogrin ◽  
Piumali Gunawardene ◽  
Gustavo Duque
Keyword(s):  
Gait Speed ◽  
Muscle Function ◽  
Older Persons ◽  
Clinical Utility ◽  
Handgrip Strength ◽  
Community Dwelling ◽  
Gait Velocity ◽  
Cut Points ◽  
Potential Biomarker ◽  
Marrow Mesenchymal Stem Cells

<b><i>Background:</i></b> Circulating osteoprogenitor (COP) cells are a surrogate of the bone marrow mesenchymal stem cells with high levels observed in osteoporosis and the initial stages of fracture healing. Conversely, a low percentage of COP cells (%COP) is strongly associated with frailty and disability. However, it is unknown whether %COP is associated with sarcopenia, a musculoskeletal disease closely related to frailty. <b><i>Objectives:</i></b> This study sought to determine the associations between %COP and sarcopenia defined using the Sarcopenia Definitions and Outcomes Consortium (SDOC) criteria. <b><i>Methods:</i></b> Data from a random sample of 73 community-dwelling older persons enrolled in the Nepean Osteoporosis and Frailty study (median age 74 years; 60% female) were analyzed. %COP was quantified by flow cytometry using selective gating of CD45/osteocalcin (OCN) + cells. Sarcopenia was defined using handgrip strength and gait speed with cut points as per the SDOC criteria. Linear regression was used for analysis. <b><i>Results:</i></b> Sarcopenia was identified in 19% of participants, all of whom were frail. After adjusting for age, sex, and interleukin 6, sarcopenic participants had 36% lower %COP (95% confidence interval [CI] −56%, −6%, <i>p =</i> 0.024). Both grip strength and gait speed showed associations with %COP (<i>p =</i> 0.065 and 0.002, respectively); however, after adjusting for age and frailty, only gait speed remained associated with %COP (0.1 m/s increase in gait velocity was associated with a 5% increase in %COP cells (95% CI 0%, 10%, <i>p =</i> 0.052). <b><i>Conclusions:</i></b> High levels of %COP are associated with better muscle function. Future longitudinal studies are required to elucidate the clinical utility of %COP as a potential biomarker or disease stratifier for sarcopenia.

scholarly journals Instrumented Assessment of Physical Activity Is Associated With Muscle Function but Not With Muscle Mass in a General Population

2017 ◽  
Vol 30 (9) ◽  
pp. 1462-1481 ◽  
Author(s):  
Anna G. M. Rojer ◽  
Esmee M. Reijnierse ◽  
Marijke C. Trappenburg ◽  
Rob C. van Lummel ◽  
Martijn Niessen ◽  
...  
Keyword(s):  
Physical Activity ◽  
General Population ◽  
Muscle Mass ◽  
Gait Speed ◽  
Muscle Function ◽  
Handgrip Strength ◽  
Group Discussion ◽  
Community Dwelling ◽  
Self Report ◽  
Middle Aged

Objectives: Self-reported physical activity has shown to affect muscle-related parameters. As self-report is likely biased, this study aimed to assess the association between instrumented assessment of physical activity (I-PA) and muscle-related parameters in a general population. Method: Included were 156 young-to-middle-aged and 80 older community-dwelling adults. Seven days of trunk accelerometry (DynaPort MoveMonitor, McRoberts B.V.) quantified daily physical activity (i.e., active/inactive duration, number and mean duration of active/inactive periods, and number of steps per day). Muscle-related parameters included muscle mass, handgrip strength, and gait speed. Results: I-PA was associated with handgrip strength in young-to-middle-aged adults and with gait speed in older adults. I-PA was not associated with muscle mass in either age group. Discussion: The association between I-PA and muscle-related parameters was age dependent. The lack of an association between I-PA and muscle mass indicates the relevance of muscle function rather than muscle mass.

GAIT SPEED AS A PREDICTOR OF RESPIRATORY MUSCLE FUNCTION, STRENGTH, AND FRAILTY SYNDROME IN COMMUNITY-DWELLING ELDERLY PEOPLE

2015 ◽  
pp. 1-5
Author(s):  
A.N. PARENTONI ◽  
V.A. MENDONÇA ◽  
K.D. DOS SANTOS ◽  
L.F. SÁ ◽  
F.O. FERREIRA ◽  
...  
Keyword(s):  
Elderly People ◽  
Gait Speed ◽  
Muscle Function ◽  
Handgrip Strength ◽  
Statistical Significance ◽  
Multivariate Model ◽  
Community Dwelling ◽  
Inspiratory Pressure ◽  
Frailty Syndrome ◽  
Maximal Inspiratory Pressure

Background: Gait speed is considered a predictor of adverse health outcomes and functional decline in the elderly. This decline is also identified in respiratory muscles. Objective: To assess the impact of gait speed in maximal inspiratory pressure, maximal expiratory pressure, handgrip strength, and the different types of frailty syndrome in community-dwelling elderly people. Design: Cross-sectional study. Participants: Women (aged ≥ 65 years) were classified into different frailty phenotypes (n = 106). Measurements: Gait speed (10 m), handgrip strength (Jamar dynamometer), and maximum inspiratory and expiratory pressures (GerAr manovacuometer, MV-150/300 model) were measured. Linear regression analyses were conducted to determine the influence of gait speed and age on handgrip strength, maximal inspiratory pressure, and maximal expiratory pressure. Logistic regression was performed to assess the influence of gait speed and frailty age (α = 0.05). Results: A total of 106 elderly women participated in the study (73.96 ± 6.91 years). Thirty-two subjects were not frail, 42 were pre-frail, and 32 were frail. Gait speed and age significantly predicted handgrip strength and frailty (p < 0.05). In the multivariate model, gait speed had the greatest contribution, while age lost statistical significance. Regarding maximal inspiratory and maximal expiratory pressures, gait speed and age were significant explanatory variables (p < 0.05). In the multivariate model, gait speed lost statistical significance to predict maximal inspiratory pressure. Conclusion: Gait speed was confirmed to be a predictor of some health outcomes, including respiratory muscle function. The results suggest that interventions to increase gait speed may contribute to improve respiratory function and muscle strength, and decrease the risk of frailty among elderly people

OBESITY DEFINITIONS IN SARCOPENIC OBESITY: DIFFERENCES IN PREVALENCE, AGREEMENT AND ASSOCIATION WITH MUSCLE FUNCTION

2019 ◽  
pp. 1-7
Author(s):  
E.Q. Khor ◽  
J.P. Lim ◽  
L. Tay ◽  
A. Yeo ◽  
S. Yew ◽  
...  
Keyword(s):  
Older Adults ◽  
Body Composition ◽  
Physical Performance ◽  
Gait Speed ◽  
Muscle Function ◽  
Handgrip Strength ◽  
Community Dwelling ◽  
Sarcopenic Obesity ◽  
Consensus Definition ◽  
The Impact

Background: Sarcopenic obesity (SO) is associated with poorer physical performance in the elderly and will increase in relevance with population ageing and the obesity epidemic. The lack of a consensus definition for SO has resulted in variability in its reported prevalence, poor inter-definitional agreement, and disagreement on its impact on physical performance, impeding further development in the field. While sarcopenia definitions have been compared, the impact of obesity definitions in SO has been less well-studied. Objectives: To compare 3 widely-adopted definitions of obesity in terms of SO prevalence, inter-definitional agreement, and association with muscle function. Design: Cross-sectional. Setting: GERILABS study, Singapore Participants: 200 community-dwelling, functionally-independent older adults. Measurements: We utilized three commonly-used definitions of obesity: body mass index (BMI), waist circumference (WC) and DXA-derived fat mass percentage (FM%). Sarcopenia was defined using Asian Working Group for Sarcopenia criteria. For muscle function, we assessed handgrip strength, gait speed and Short Physical Performance Battery (SPPB). Subjects were classified into 4 body composition phenotypes (normal, obese, sarcopenic and SO), and outcomes were compared between groups. Results: The prevalence rate for SO was lowest for BMI (0.5%) compared to FM% (10.0%) and WC (10.5%). Inter-definitional agreement was lowest between BMI and WC (κ=0.364), and at best moderate between FM% and WC (κ=0.583). SO performed the worst amongst body composition phenotypes in handgrip strength, gait speed and SPPB (all p<0.01) only when defined using WC. In regression analyses, SO was associated with decreased SPPB scores (β=-0.261, p=0.001) only for the WC definition. Conclusion: There is large variation in the prevalence of SO across different obesity definitions, with low-to-moderate agreement between them. Our results corroborate recent evidence that WC, and thus central obesity, is best associated with poorer muscle function in SO. Thus, WC should be further explored in defining obesity for accurate and early characterization of SO among older adults in Asian populations.

GAIT SPEED AND HANDGRIP STRENGTH AS PREDICTORS OF INCIDENT DISABILITY IN MEXICAN OLDER ADULTS

2014 ◽  
pp. 1-4
Author(s):  
T. LOPEZ-TEROS ◽  
L.M. GUTIERREZ-ROBLEDO ◽  
M.U. PEREZ-ZEPEDA
Keyword(s):  
Older Adults ◽  
Gait Speed ◽  
Daily Living ◽  
Handgrip Strength ◽  
Statistical Significance ◽  
Adverse Outcomes ◽  
Community Dwelling ◽  
Performance Tests ◽  
One Year

Physical performance tests are associated with different adverse outcomes in older people. Theobjective of this study was to test the association between handgrip strength and gait speed with incidentdisability in community-dwelling, well-functioning, Mexican older adults (age ≥70 years). Incident disability wasdefined as the onset of any difficulty in basic or instrumental activities of daily living. Of a total of 133participants, 52.6% (n=70) experienced incident disability during one year of follow-up. Significant associationsof handgrip strength (odds ratio [OR] 0.96, 95% confidence interval [95%CI] 0.93-0.99) and gait speed (OR0.27, 95%CI 0.07-0.99) with incident disability were reported. The inclusion of covariates in the models reducedthe statistical significance of the associations without substantially modifying the magnitude of them. Handgripstrength and gait speed are independently associated with incident disability in Mexican older adults.

scholarly journals Reliability of two gait speed tests of different timed phases and equal non-timed phases in community-dwelling older persons

Medwave ◽  
2019 ◽  
Vol 19 (03) ◽  
pp. e7611-e7611 ◽  
Author(s):  
Lincoyán Fernández-Huerta ◽  
Karen Córdova-León
Keyword(s):  
Gait Speed ◽  
Older Persons ◽  
Community Dwelling

scholarly journals Circulating MicroRNA-486 and MicroRNA-146a Serve as Potential Biomarkers of Sarcopenia in the Elderly

2020 ◽  
Author(s):  
Huang-Chun Liu ◽  
Der‐Sheng Han ◽  
Chih-Chin Hsu ◽  
Jong-Shyan Wang
Keyword(s):  
Gait Speed ◽  
Handgrip Strength ◽  
Quantitative Polymerase Chain Reaction ◽  
Area Under The Curve ◽  
The Elderly ◽  
Community Dwelling ◽  
Circulating Microrna ◽  
Characteristic Analysis ◽  
Age Related ◽  
Muscular Function

Abstract Background: Age-related sarcopenia meaningfully increases the risks of functional limitations and mortality in the elderly. Although circulating microRNAs (c-miRNAs) are associated with aging-related cellular senescence and inflammation, the relationships between c-miRNAs and sarcopenia in the elderly remain unclear. This study investigates whether circulating myo-miRNAs and inflammation-related miRNAs are associated with sarcopenia in the elderly. Methods: This investigation recruited 77 eligible subjects (41 males and 36 females) from 597 community-dwelling older adults, and then divided into normal (n=24), dynapenic (loss of muscular function without mass, n=35), and sarcopenic groups (loss of muscular function with mass, n=18). Moreover, myo- (c-miRNA-133a and c-miRNA-486) and inflammation- (c-miRNA-21 and c-miRNA-146a) related miRNAs, as well as, inflammatory-related cytokine and peroxide levels in plasma were determined using quantitative polymerase chain reaction and ELISA, respectively. Results: Sarcopenic group exhibited lesser skeletal muscle mass index (SMI), handgrip strength, and gait speed, as well as, lower c-miR-486 and c-miR-146a levels, compared to those of normal and dynapenic groups. Moreover, c-miR-486 level was positively related to SMI (r=0.334, P=0.003), whereas c-miR-146a level was positively associated with SMI (r=0.240, P=0.035) and handgrip strength (r=0.253, P=0.027). In the receiver operating characteristic analysis for predicting sarcopenia, the area under the curve in c-miR-486 was 0.708 (95% confidence interval: 0.561-0.855, P=0.008) and c-miR-146a was 0.676 (95% CI: 0.551-0.801, P=0.024). However, no significant relationships were observed between SMI/handgrip strength/gait speed and plasma myeloperoxidase/interleukin-1𝛽/interleukin-6 levels. Conclusions: Myo-miRNA (c-miR-486) and inflammation-related miRNA (c-miR-146a) are superior to inflammatory peroxide/cytokines in plasma for serving as critical biomarkers of age-related sarcopenia.

scholarly journals The Diagnostic Value of the Short Physical Performance Battery for Sarcopenia

2020 ◽  
Author(s):  
Steven Phu ◽  
Ben Kirk ◽  
Ebrahim Bani Hassan ◽  
Sara Vogrin ◽  
Jesse Zanker ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Physical Performance ◽  
Older Persons ◽  
High Sensitivity ◽  
Diagnostic Value ◽  
Community Dwelling ◽  
Short Physical Performance Battery ◽  
Clinical Settings ◽  
Cut Points ◽  
Cut Point

Abstract BACKGROUND: Sarcopenia is defined as the age-related loss of muscle mass, strength and physical performance. The original European Working Group on Sarcopenia in Older Persons (EWGSOP1) definition, and its revision (EWGSOP2), provide new cut-points and alternate measures for sarcopenia diagnosis. However, sarcopenia is rarely diagnosed in clinical settings owing to its labour-intensive screening process. Given the Short Physical Performance Battery (SPPB) is a quick, easily administrable and objective measure of muscle strength and physical performance, both of which are key components of sarcopenia, this study examined the diagnostic value of the SPPB for this muscle disease.METHODS: A cross-sectional analysis of 294 community-dwelling older persons (≥65 years) was conducted. Appendicular lean body mass [(ALM) divided by height squared (ALM/h 2 )], muscle strength (handgrip/sit to stand), and physical performance [gait speed, timed up and go (TUG) and SPPB] were assessed using validated procedures, while participants were diagnosed with sarcopenia following the EWGSOP1 and EWGSOP2 criteria. Diagnostic ability of the SPPB independently and combined with ALM/h 2 for sarcopenia was determined using area under the curve (AUC). Potential cut-points were identified, and sensitivity and specificity calculated.RESULTS: Prevalence of sarcopenia ranged from 4 to 16% depending on the definition. The SPPB demonstrated moderate (AUC = 0.644-0.770) value in diagnosing sarcopenia, and a cut-point of ≤8points in SPPB performance resulted in high sensitivity (82-100%) but low specificity (36-41%) for diagnosing those with severe sarcopenia.CONCLUSIONS: The SPPB displayed acceptable value in diagnosing older adults with severe sarcopenia. Moreover, the high sensitivity of the SPPB when using the cut-point of ≤8 suggests it may be a favourable screening tool for sarcopenia in clinical settings where ALM measurements are not available.

Associations of Impaired Renal Function With Declines in Muscle Strength and Muscle Function in Older Men: Findings From the CHAMP Study

2019 ◽  
Vol 74 (11) ◽  
pp. 1812-1820 ◽  
Author(s):  
Tadashi Toyama ◽  
Oliver van den Broek-Best ◽  
Toshiaki Ohkuma ◽  
David Handelsman ◽  
Louise M Waite ◽  
...  
Keyword(s):  
Renal Function ◽  
Muscle Strength ◽  
Renal Impairment ◽  
Grip Strength ◽  
Lean Mass ◽  
Gait Speed ◽  
Muscle Function ◽  
Older Men ◽  
Community Dwelling ◽  
Physical Parameters

Abstract Background Advanced kidney disease is associated with reduced muscle strength and physical performance. However, associations between early stages of renal impairment and physical outcomes are unclear. Methods The Concord Health and Ageing in Men Project is a prospective study of 1,705 community-dwelling men aged 70 years and older. Participants with estimated glomerular filtration rate (eGFR) more than 30 mL/min/1.73 m2 were included and further divided into four eGFR categories. Physical parameters including grip strength, gait speed, appendicular lean mass (ALM, a sum of skeletal mass of arms and legs), ALM adjusted for body mass index (ALMBMI), and muscle function (measured using grip strength divided by arm lean mass) were assessed at both baseline and 5-year follow-up. Associations between kidney function and changes in physical parameters were analyzed using linear and logistic regression models. Results Our study included 789 men with a median age of 75 years and median eGFR of 72 mL/min/1.73 m2 at baseline. Over 5 years, grip strength, gait speed, ALMBMI, and muscle function all declined in the whole cohort, compared with baseline. The multivariable analyses showed that poorer renal function was associated with more rapid declines in grip strength, gait speed, and muscle function in participants with mild-to-moderate renal impairment (GFR category stage G3, eGFR < 60 mL/min/1.73 m2) (p = .01, p < .01, p = .02, respectively) but less so in those with eGFR more than 60 mL/min/1.73 m2, whereas eGFR category did not have a significant impact on declines in ALMBMI. These results remained unchanged with or without adjustment for age. Conclusions In community-dwelling older men, mild-to-moderate renal impairment at baseline was associated with declines in grip strength, gait speed, and muscle function over time despite preservation of muscle mass.

scholarly journals Relation between leg extension power and 30-s sit-to-stand muscle power in older adults: validation and translation to functional performance

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Julian Alcazar ◽  
Rikke S. Kamper ◽  
Per Aagaard ◽  
Bryan Haddock ◽  
Eva Prescott ◽  
...  
Keyword(s):  
Physical Performance ◽  
Lower Limb ◽  
Gait Speed ◽  
Muscle Power ◽  
Handgrip Strength ◽  
Community Dwelling ◽  
Leg Extension ◽  
Sit To Stand ◽  
Significant Difference ◽  
Leg Extension Power

Abstract This study aimed to assess the validity and functional relevance of a standardized procedure to assess lower limb muscle power by means of the 30-s sit-to-stand (STS) test when compared to leg extension power (LEP), traditional STS performance and handgrip strength. A total of 628 community-dwelling older subjects (60–93 years) from the Copenhagen Sarcopenia Study were included. Physical performance was assessed by the 30-s STS and 10-m maximal gait speed tests. Handgrip strength and LEP were recorded by a hand-held dynamometer and the Nottingham power rig, respectively. STS muscle power was calculated using the subjects’ body mass and height, chair height and the number of repetitions completed in the 30-s STS test. We found a small albeit significant difference between LEP and unilateral STS power in older men (245.5 ± 88.8 vs. 223.4 ± 81.4 W; ES = 0.26; p < 0.05), but not in older women (135.9 ± 51.9 vs. 138.5 ± 49.6 W; ES = 0.05; p > 0.05). Notably, a large positive correlation was observed between both measures (r = 0.75; p < 0.001). Relative STS power was more strongly related with maximal gait speed than handgrip strength, repetition-based STS performance and relative LEP after adjusting for age (r = 0.53 vs 0.35–0.45; p < 0.05). In conclusion, STS power obtained from the 30-s STS test appeared to provide a valid measure of bilateral lower limb power and was more strongly related with physical performance than maximal handgrip strength, repetition-based STS performance and LEP.

scholarly journals Thyroid hormone signaling is associated with physical performance, muscle mass, and strength in a cohort of oldest-old: results from the Mugello study

GeroScience ◽  
2020 ◽  
Author(s):  
Angelo Di Iorio ◽  
Roberto Paganelli ◽  
Michele Abate ◽  
Giovanni Barassi ◽  
Alex Ireland ◽  
...  
Keyword(s):  
Muscle Mass ◽  
Physical Performance ◽  
Muscle Function ◽  
Handgrip Strength ◽  
Oldest Old ◽  
Central Italy ◽  
Community Dwelling ◽  
Cross Sectional ◽  
Skeletal Muscle Index ◽  
Muscle Aging

AbstractThyroid hormones (THs) play a crucial role in the homeostasis of muscle function, such as myogenesis and energy metabolism, suggesting that the thyroid may be also involved in the entropic processes of muscle aging. The aim of the present study is to evaluate the effect of TH signaling on physical performance, muscle mass, and strength in a cohort of community-dwelling oldest-old subjects (> 90 years). The study population was selected in a rural area of central Italy (Mugello, Tuscany), and the design was cross-sectional. Four hundred seventy-five subjects (130 males and 345 females) were enrolled, representing about 65% of all the nonagenarians living in the Mugello area. After adjusting for multiple confounding factors (sex, age, diabetes, and levothyroxine administration), the lowest quartile of FT3/FT4 ratio distribution showed lower physical performance compared to the other quartiles (β ± SE: − 0.49 ± 0.12; p < 0.001), whereas the highest quartile of FT3/FT4 ratio was associated with higher skeletal muscle index (β ± SE: 1.11 ± 0.42; p = 0.009). In addition, the lowest quartile of FT4 showed a statistically significant higher handgrip strength (β ± SE: 1.78 ± 0.68; p = 0.009) compared to all other quartiles. This study demonstrates that nonagenarians with higher FT3/FT4 ratios had better preserved muscle function, therefore successfully overcoming the imbalance of homeostatic and entropic processes involved in muscle aging. However, we could not establish a cause-effect relationship due to the cross-sectional design of the study.

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