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Sharma AR, Chatterjee S, Lee YH, Lee SS. Targeting Crosstalk of Signaling Pathways among Muscles-Bone-Adipose Tissue: A Promising Therapeutic Approach for Sarcopenia. Aging Dis 2024; 15:1619-1645. [PMID: 37815907 PMCID: PMC11272187 DOI: 10.14336/ad.2023.00903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 09/03/2023] [Indexed: 10/12/2023] Open
Abstract
The aging process is associated with the development of a wide range of degenerative disorders in mammals. These diseases are characterized by a progressive decline in function at multiple levels, including the molecular, cellular, tissue, and organismal. Furthermore, it is responsible for various healthcare costs in developing and developed countries. Sarcopenia is the deterioration in the quality and functionality of muscles, which is extremely concerning as it manages many functions in the human body. This article reviews the molecular crosstalk involved in sarcopenia and the specific roles of many mediator molecules in establishing cross-talk between muscles, bone, and fatty tissues, eventually leading to sarcopenia. Besides, the involvement of various etiological factors, such as neurology, endocrinology, lifestyle, etc., makes it exceedingly difficult for clinicians to develop a coherent hypothesis that may lead to the well-organized management system required to battle this debilitating disease. The several hallmarks contributing to the progression of the disease is a vital question that needs to be addressed to ensure an efficient treatment for sarcopenia patients. Also, the intricate molecular mechanism involved in developing this disease requires more studies. The direct relationship of cellular senescence with aging is one of the pivotal issues contributing to disease pathophysiology. Some patented treatment strategies have been discussed, including drugs undergoing clinical trials and emerging options like miRNA and protein-enclosed extracellular vesicles. A clear understanding of the secretome, including the signaling pathways involved between muscles, bone, and fatty tissues, is extremely beneficial for developing novel therapeutics for curing sarcopenia.
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Affiliation(s)
| | | | | | - Sang-Soo Lee
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon-si, 24252, Gangwon-do, Republic of Korea
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Negro M, Crisafulli O, D'Antona G. Effects of essential amino acid (EAA) and glutamine supplementation on skeletal muscle wasting in acute, subacute, and postacute conditions. Clin Nutr ESPEN 2024; 62:224-233. [PMID: 38843393 DOI: 10.1016/j.clnesp.2024.05.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 05/24/2024] [Accepted: 05/25/2024] [Indexed: 06/22/2024]
Abstract
Under optimal physiological conditions, muscle mass maintenance is ensured by dietary protein, which balances the amino acid loss during the post-absorption period and preserves the body's protein homeostasis. Conversely, in critical clinical conditions (acute, subacute or postacute), particularly those related to hypomobility or immobility, combined with malnutrition, and local/systemic inflammation, the loss of muscle mass and strength can be quantitatively significant. A decline of more than 1% in muscle mass and of more than 3% in muscle strength has been registered in subjects with aged 20-37 yr after just five days of bed rest, similarly to those observed during one year of age-related decline in individuals over the age of 50. Loss of muscle mass and strength can have a dramatic effect on subjects' functional capacities, on their systemic metabolic control and on the amino acid reserve function, all of which are fundamental for the maintenance of other organs' and tissues' cell processes. References available indicate that the average 1%-2% reduction per day of muscle mass in patients in the intensive care unit (ICU) could represent an independent predictor of hospital mortality and physical disability in the five years following hospitalization. After just a few days or weeks of administration, supplementation with EAAs and glutamine has shown significant effects in maintaining muscle size and strength, which are typically negatively affected by some acute/subacute or postacute critical conditions (muscle recovery after surgery, oncology patients, ICU treatments), especially in the elderly or in those with pre-existing degenerative diseases. In this review, we focused on the theoretical bases and the most relevant clinical studies of EAA and glutamine supplementation as a single compound, with the aim of clarifying whether their combined use in a blend (EAAs-glutamine) could be potentially synergistic to prevent disease-related muscle wasting and its impact on the duration and quality of patients' clinical course.
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Affiliation(s)
- Massimo Negro
- Centro di Ricerca Interdipartimentale nelle Attività Motorie e Sportive (CRIAMS) - Sport Medicine Centre, University of Pavia, Voghera, Italy
| | - Oscar Crisafulli
- Centro di Ricerca Interdipartimentale nelle Attività Motorie e Sportive (CRIAMS) - Sport Medicine Centre, University of Pavia, Voghera, Italy
| | - Giuseppe D'Antona
- Centro di Ricerca Interdipartimentale nelle Attività Motorie e Sportive (CRIAMS) - Sport Medicine Centre, University of Pavia, Voghera, Italy; Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy.
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3
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Qian XX, Chau PH, Fong DYT, Ho M, Woo J. Identifying factors associated with post-hospital falls in older patients: a territory-wide cohort study. Public Health 2024; 235:1-7. [PMID: 39032191 DOI: 10.1016/j.puhe.2024.06.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 05/07/2024] [Accepted: 06/15/2024] [Indexed: 07/22/2024]
Abstract
OBJECTIVES Post-hospital falls impose a substantial healthcare burden on older adults, yet contributing factors remain inadequately examined. This study aimed to investigate underinvestigated factors associated with post-hospital falls. STUDY DESIGN Retrospective territory-wide cohort study. METHODS We examined the electronic medical records of patients aged ≥65 who were discharged from public hospitals in Hong Kong (2007-2018). During the 12 months following discharge, participants were monitored to identify falls based on diagnosis codes or clinical notes from inpatient episodes, the emergency department (ED) visits, and death records. Falls were categorized into two groups: those only requiring ED visits and those requiring hospitalizations. Binary logistic and multinomial logistic regressions examined the associated factors for post-hospital falls and subcategories of falls, respectively. RESULTS Among 606,392 older patients, 28,593 (4.71%; 95% CI = 4.66%-4.77%) experienced falls within 12 months after discharge. Of those, 8438 (29.5%) only required ED visits, and 20,147 (70.5%) required hospitalizations. Discharge from non-surgical wards, length of stay over two weeks, receiving the Geriatric Day Hospital and Rehabilitation Day Program, advancing age, being female, having more comorbidities, taking more fall risk increasing drugs, previous admission for falls, and living in Hong Kong Island were associated with increased fall risk. Receiving allied health service or nurse service was associated with reduced risk. The same factors were more associated with falls requiring hospitalizations rather than falls only requiring ED visits. CONCLUSIONS Older patients with identified factors were particularly vulnerable to post-hospital falls leading to rehospitalizations. Fall risk assessment and tailored prevention should prioritize this group.
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Affiliation(s)
- X X Qian
- School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - P H Chau
- School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
| | - D Y T Fong
- School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - M Ho
- School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - J Woo
- Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
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Back T, Taconeli CA, Schieferdecker MEM. Association between calf circumference and mortality in people receiving home enteral nutrition: A retrospective cohort study. JPEN J Parenter Enteral Nutr 2024. [PMID: 38963146 DOI: 10.1002/jpen.2671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 06/10/2024] [Accepted: 06/16/2024] [Indexed: 07/05/2024]
Abstract
BACKGROUND Among the anthropometric measurements, calf circumference has been widely used as a simple and practical method to diagnose low muscle mass and sarcopenia. However, the association between this measurement and clinical outcomes in people receiving home enteral nutrition is still unknown. Therefore, this study aimed to investigate the association of calf circumference with mortality, discharge from home enteral nutrition, continuity in home enteral nutrition, and new hospitalizations in adult and older adult people. METHODS This retrospective cohort study used secondary data, including people aged ≥18 years receiving home enteral nutrition. The association between calf circumference and the outcomes of mortality, discharge from home enteral nutrition, and continuity in home enteral nutrition was analyzed using multinomial logistic regression. The association between calf circumference and the occurrence of new hospitalizations was investigated using binary logistic regression. RESULTS Among the 899 people included in the study, 470 were men (52.3%), the median age was 72 years (interquartile range, 56.5-82), and 850 had inadequate calf circumference (94.5%). As calf circumference increased, the odds of mortality decreased and the probability of discharge from home enteral nutrition and continuity in home enteral nutrition increased. Furthermore, in people with oncologic diagnoses, the odds of new hospitalizations were reduced by 71.9% for each additional centimeter in calf circumference. CONCLUSION These findings underline the importance of using calf circumference as part of the nutrition assessment because it is a simple, easy, and cost-effective method that can also be used as a tool to predict clinical outcomes.
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Affiliation(s)
- Thamara Back
- Clinical Hospital Complex, Federal University of Paraná, Curitiba, Paraná, Brazil
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Jung W, Juang U, Gwon S, Nguyen H, Huang Q, Lee S, Lee B, Kim SH, Ryu S, Park J, Park J. Identifying the potential therapeutic effects of miR‑6516 on muscle disuse atrophy. Mol Med Rep 2024; 30:119. [PMID: 38757344 PMCID: PMC11129540 DOI: 10.3892/mmr.2024.13243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 03/27/2024] [Indexed: 05/18/2024] Open
Abstract
Muscle atrophy is a debilitating condition with various causes; while aging is one of these causes, reduced engagement in routine muscle‑strengthening activities also markedly contributes to muscle loss. Although extensive research has been conducted on microRNAs (miRNAs/miRs) and their associations with muscle atrophy, the roles played by miRNA precursors remain underexplored. The present study detected the upregulation of the miR‑206 precursor in cell‑free (cf)RNA from the plasma of patients at risk of sarcopenia, and in cfRNAs from the muscles of mice subjected to muscle atrophy. Additionally, a decline in the levels of the miR‑6516 precursor was observed in mice with muscle atrophy. The administration of mimic‑miR‑6516 to mice immobilized due to injury inhibited muscle atrophy by targeting and inhibiting cyclin‑dependent kinase inhibitor 1b (Cdkn1b). Based on these results, the miR‑206 precursor appears to be a potential biomarker of muscle atrophy, whereas miR‑6516 shows promise as a therapeutic target to alleviate muscle deterioration in patients with muscle disuse and atrophy.
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Affiliation(s)
- Woohyeong Jung
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Uijin Juang
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Suhwan Gwon
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Hounggiang Nguyen
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Qingzhi Huang
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Soohyeon Lee
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Beomwoo Lee
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Seon-Hwan Kim
- Department of Neurosurgery, Institute for Cancer Research, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Sunyoung Ryu
- Mitos Biomedical Institute, Mitos Therapeutics Inc., Daejeon 34134, Republic of Korea
| | - Jisoo Park
- Mitos Biomedical Institute, Mitos Therapeutics Inc., Daejeon 34134, Republic of Korea
| | - Jongsun Park
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
- Mitos Biomedical Institute, Mitos Therapeutics Inc., Daejeon 34134, Republic of Korea
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Hyngstrom AS, Nguyen JN, Gutterman DD, Schmit BD, Klevenow EA, Durand MJ. Noninvasive estimation of skeletal muscle oxygen consumption rate and microvascular reactivity in chronic stroke survivors using near-infrared spectroscopy. J Appl Physiol (1985) 2024; 137:23-31. [PMID: 38601999 DOI: 10.1152/japplphysiol.00093.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/12/2024] Open
Abstract
Understanding post-stroke changes in skeletal muscle oxidative metabolism and microvascular reactivity could help create therapeutic targets that optimize rehabilitative interventions. Due to disuse atrophy, we hypothesized that basal muscle oxygen consumption rate and microvascular endothelial function would be impaired in the tibialis anterior (TA) muscle of the affected leg of chronic stroke survivors compared with the nonaffected leg and versus matched controls. Fifteen chronic stroke survivors (10 females) and 15 matched controls (9 females) completed this study. A near-infrared spectroscopy oximeter measured tissue oxygen saturation (StO2) of the TA in both legs of stroke survivors and the dominant leg of controls. A cuff was placed around the thigh and inflated to 225 mmHg for 5 min while StO2 was continuously measured. The rate of change in StO2 was calculated during cuff occlusion and immediately post-cuff release. The rate of oxygen desaturation was similar between the legs of the stroke survivors (paretic -0.12 ± 0.04%·s-1 vs. nonparetic -0.16 ± 011%·s-1; P = 0.49), but the paretic leg had a reduced desaturation rate versus controls (-0.25 ± 0.18%·s-1; P = 0.007 vs. paretic leg). After cuff release, there was a greater oxygen resaturation rate in the nonparetic leg compared with the paretic leg (3.13 ± 2.08%·s-1 vs. 1.60 ± 1.11%·s-1, respectively; P = 0.01). The control leg had a similar resaturation rate versus the nonparetic leg (control = 3.41 ± 1.79%·s-1; P = 0.69) but was greater than the paretic leg (P = 0.003). The TA in the paretic leg had an impaired muscle oxygen consumption rate and reduced microvascular endothelial function compared with controls.NEW & NOTEWORTHY Secondary consequences of stroke are not well described. In this study, we show that basal muscle oxidative consumption and microvascular endothelial function are reduced in the paretic tibialis anterior muscle of chronic stroke survivors compared with matched controls using near-infrared spectroscopy and the vascular occlusion technique. There was a moderately strong correlation between microvascular endothelial function and paretic leg strength.
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Affiliation(s)
- Allison S Hyngstrom
- Department of Physical Therapy, Marquette University, Milwaukee, Wisconsin, United States
| | - Jennifer N Nguyen
- Department of Physical Medicine and Rehabilitation, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
| | - David D Gutterman
- Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
| | - Brian D Schmit
- Department of Biomedical Engineering, Marquette University and the Medical College of Wisconsin, Milwaukee, Wisconsin, United States
| | - Emilie A Klevenow
- Department of Physical Therapy, Marquette University, Milwaukee, Wisconsin, United States
| | - Matthew J Durand
- Department of Physical Medicine and Rehabilitation, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
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Lee Satcher R, Fiedler B, Ghali A, Dirschl DR. Effect of Spaceflight and Microgravity on the Musculoskeletal System: A Review. J Am Acad Orthop Surg 2024; 32:535-541. [PMID: 38652883 DOI: 10.5435/jaaos-d-23-00954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 03/11/2024] [Indexed: 04/25/2024] Open
Abstract
With National Aeronautics and Space Administration's plans for longer distance, longer duration spaceflights such as missions to Mars and the surge in popularity of space tourism, the need to better understand the effects of spaceflight on the musculoskeletal system has never been more present. However, there is a paucity of information on how spaceflight affects orthopaedic health. This review surveys existing literature and discusses the effect of spaceflight on each aspect of the musculoskeletal system. Spaceflight reduces bone mineral density at rapid rates because of multiple mechanisms. While this seems to be recoverable upon re-exposure to gravity, concern for fracture in spaceflight remains as microgravity impairs bone strength and fracture healing. Muscles, tendons, and entheses similarly undergo microgravity adaptation. These changes result in decreased muscle mass, increased tendon laxity, and decreased enthesis stiffness, thus decreasing the strength of the muscle-tendon-enthesis unit with variable recovery upon gravity re-exposure. Spaceflight also affects joint health; unloading of the joints facilitates changes that thin and atrophy cartilage similar to arthritic phenotypes. These changes are likely recoverable upon return to gravity with exercise. Multiple questions remain regarding effects of longer duration flights on health and implications of these findings on terrestrial medicine, which should be the target of future research.
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Affiliation(s)
- Robert Lee Satcher
- From the Department of Orthopedic Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX (Lee Satcher), and the Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX (Fiedler, Ghali, and Dirschl)
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Ganse B. Methods to accelerate fracture healing - a narrative review from a clinical perspective. Front Immunol 2024; 15:1384783. [PMID: 38911851 PMCID: PMC11190092 DOI: 10.3389/fimmu.2024.1384783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 05/14/2024] [Indexed: 06/25/2024] Open
Abstract
Bone regeneration is a complex pathophysiological process determined by molecular, cellular, and biomechanical factors, including immune cells and growth factors. Fracture healing usually takes several weeks to months, during which patients are frequently immobilized and unable to work. As immobilization is associated with negative health and socioeconomic effects, it would be desirable if fracture healing could be accelerated and the healing time shortened. However, interventions for this purpose are not yet part of current clinical treatment guidelines, and there has never been a comprehensive review specifically on this topic. Therefore, this narrative review provides an overview of the available clinical evidence on methods that accelerate fracture healing, with a focus on clinical applicability in healthy patients without bone disease. The most promising methods identified are the application of axial micromovement, electromagnetic stimulation with electromagnetic fields and direct electric currents, as well as the administration of growth factors and parathyroid hormone. Some interventions have been shown to reduce the healing time by up to 20 to 30%, potentially equivalent to several weeks. As a combination of methods could decrease the healing time even further than one method alone, especially if their mechanisms of action differ, clinical studies in human patients are needed to assess the individual and combined effects on healing progress. Studies are also necessary to determine the ideal settings for the interventions, i.e., optimal frequencies, intensities, and exposure times throughout the separate healing phases. More clinical research is also desirable to create an evidence base for clinical guidelines. To make it easier to conduct these investigations, the development of new methods that allow better quantification of fracture-healing progress and speed in human patients is needed.
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Affiliation(s)
- Bergita Ganse
- Innovative Implant Development (Fracture Healing), Clinics and Institutes of Surgery, Saarland University, Homburg, Germany
- Department of Trauma, Hand and Reconstructive Surgery, Clinics and Institutes of Surgery, Saarland University, Homburg, Germany
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Murgia M, Rittweger J, Reggiani C, Bottinelli R, Mann M, Schiaffino S, Narici MV. Spaceflight on the ISS changed the skeletal muscle proteome of two astronauts. NPJ Microgravity 2024; 10:60. [PMID: 38839773 PMCID: PMC11153545 DOI: 10.1038/s41526-024-00406-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 05/22/2024] [Indexed: 06/07/2024] Open
Abstract
Skeletal muscle undergoes atrophy and loss of force during long space missions, when astronauts are persistently exposed to altered gravity and increased ionizing radiation. We previously carried out mass spectrometry-based proteomics from skeletal muscle biopsies of two astronauts, taken before and after a mission on the International Space Station. The experiments were part of an effort to find similarities between spaceflight and bed rest, a ground-based model of unloading, focused on proteins located at the costameres. We here extend the data analysis of the astronaut dataset and show compartment-resolved changes in the mitochondrial proteome, remodeling of the extracellular matrix and of the antioxidant response. The astronauts differed in their level of onboard physical exercise, which correlated with their respective preservation of muscle mass and force at landing in previous analyses. We show that the mitochondrial proteome downregulation during spaceflight, particularly the inner membrane and matrix, was dramatic for both astronauts. The expression of autophagy regulators and reactive oxygen species scavengers, however, showed partially opposite expression trends in the two subjects, possibly correlating with their level of onboard exercise. As mitochondria are primarily affected in many different tissues during spaceflight, we hypothesize that reactive oxygen species (ROS) rather than mechanical unloading per se could be the primary cause of skeletal muscle mitochondrial damage in space. Onboard physical exercise might have a strong direct effect on the prevention of muscle atrophy through mechanotransduction and a subsidiary effect on mitochondrial quality control, possibly through upregulation of autophagy and anti-oxidant responses.
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Affiliation(s)
- Marta Murgia
- Department of Biomedical Sciences, University of Padova, 35131, Padua, Italy.
- Max-Planck-Institute of Biochemistry, 82152, Martinsried, Germany.
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University Hospital Cologne, Cologne, Germany
| | - Carlo Reggiani
- Department of Biomedical Sciences, University of Padova, 35131, Padua, Italy
- Science and Research Center Koper, Institute for Kinesiology Research, 6000, Koper, Slovenia
| | - Roberto Bottinelli
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
- IRCCS Policlinico San Matteo Foundation, Pavia, Italy
| | - Matthias Mann
- Department of Biomedical Sciences, University of Padova, 35131, Padua, Italy
- NNF Center for Protein Research, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Marco V Narici
- Department of Biomedical Sciences, University of Padova, 35131, Padua, Italy
- Science and Research Center Koper, Institute for Kinesiology Research, 6000, Koper, Slovenia
- CIR-MYO Myology Center, 35121, Padua, Italy
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Zeng H, Zeng X, Liu N, Ding Y, Wu J, Zhang F, Xiong N. Development and validation of a nomogram for tracheotomy decannulation in individuals in a persistent vegetative state: A multicentre study. Ann Phys Rehabil Med 2024; 67:101849. [PMID: 38830320 DOI: 10.1016/j.rehab.2024.101849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/12/2024] [Accepted: 03/20/2024] [Indexed: 06/05/2024]
Abstract
BACKGROUND Decannulation for people in a persistent vegetative state (PVS) is challenging and relevant predictors of successful decannulation have yet to be identified. OBJECTIVE This study aimed to explore the predictors of tracheostomy decannulation outcomes in individuals in PVS and to develop a nomogram. METHOD In 2022, 872 people with tracheostomy in PVS were retrospectively enrolled and their data was randomly divided into a training set and a validation set in a 7:3 ratio. Univariate and multivariate regression analyses were performed on the training set to explore the influencing factors for decannulation and nomogram development. Internal validation was performed using 5-fold cross-validation. External validation was performed using receiver operating characteristic (ROC) curves, calibration curves, and decision curve analysis (DCA) on both the training and validation sets. RESULT Data from 610 to 262 individuals were used for the training and validation sets, respectively. The multivariate regression analysis found that duration of tracheostomy tube placement≥30 days (Odds Ratio [OR] 0.216, 95 % CI 0.151-0.310), pulmonary infection (OR 0.528, 95 %CI 0.366-0.761), hypoproteinemia (OR 0.669, 95 % CI 0.463-0.967), no passive standing training (OR 0.372, 95 % CI 0.253-0.547), abnormal swallowing reflex (OR 0.276, 95 % CI 0.116-0.656), mechanical ventilation (OR 0.658, 95 % CI 0.461-0.940), intensive care unit (ICU) duration>4 weeks (OR 0.517, 95 % CI 0.332-0.805), duration of endotracheal tube (OR 0.855, 95 % CI 0.803-0.907), older age (OR 0.981, 95 % CI 0.966-0.996) were risk factors for decannulation failure. Conversely, peroral feeding (OR 1.684, 95 % CI 1.178-2.406), passive standing training≥60 min (OR 1.687, 95 % CI 1.072-2.656), private caregiver (OR 1.944, 95 % CI 1.350-2.799) and ICU duration<2 weeks (OR 1.758, 95 % CI 1.173-2.634) were protective factors conducive to successful decannulation. The 5-fold cross-validation revealed a mean area under the curve of 0.744. The ROC curve C-indexes for the training and validation sets were 0.784 and 0.768, respectively, and the model exhibited good stability and accuracy. The DCA revealed a net benefit when the risk threshold was between 0 and 0.4. CONCLUSION The nomogram can help adjust the treatment and reduce decannulation failure. REGISTRATION Clinical registration is not mandatory for retrospective studies.
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Affiliation(s)
- Hongji Zeng
- School of Public Health, Zhengzhou University, No. 100 Science Avenue, Zhengzhou City, Henan Province 450000, China
| | - Xi Zeng
- Department of Rehabilitation Medicine III, The First Affiliated Hospital of Zhengzhou University, No.169-10 Nanyang Road, Zhengzhou City, Henan Province 450000, China; The NHC Key Laboratory of Prevention and Treatment of Cerebrovascular Disease, No.1 Jianshe East Road, Zhengzhou City, Henan Province 450000, China.
| | - Nanxi Liu
- Sanquan College, No. 688, East Section of Shixiangyang Road, Xinxiang City, Henan Province 453000, China
| | - Yu Ding
- Department of Neurology, The Second Medical Center, PLA General Hospital, No. 28 Fuxing Road, Beijing City 100000, China
| | - Junfa Wu
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, No. 433 Huashan Road, Shanghai City 200000, China
| | - Fangquan Zhang
- Department of Rehabilitation Medicine, Xinyang Central Hospital, No.1 Siyi Road, Xinyang City, Henan Province 464000, China
| | - Nana Xiong
- Peking University Sixth Hospital, No. 51 Huayuan North Road, Beijing City 101499, China
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11
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Mackenzie SW, Smith CP, Tremblay MF, Day BL, Reynolds RF. Bed rest impairs the vestibular control of balance. J Physiol 2024; 602:2985-2998. [PMID: 38766932 DOI: 10.1113/jp285834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 04/18/2024] [Indexed: 05/22/2024] Open
Abstract
Prolonged bed rest impairs standing balance but the underlying mechanisms are uncertain. Previous research suggests strength loss is not the cause, leaving impaired sensorimotor control as an alternative. Here we examine vestibular control of posture in 18 male volunteers before and after 60 days of bed rest. Stochastic vestibular stimulation (SVS) was used to evoke sway responses before, 1 and 6 days after bed rest under different head yaw orientations. The directional accuracy and precision of these responses were calculated from ground reaction force vectors. Bed rest caused up to 63% increases in spontaneous standing sway and 31% reductions in leg strength, changes which were uncorrelated. The increase in sway was exacerbated when the eyes were closed. Mean directions of SVS-evoked sway responses were unaffected, being directed towards the anodal ear and rotating in line with head orientation in the same way before and after bed rest. However, individual trial analysis revealed 25%-30% increases in directional variability, which were significantly correlated with the increase in spontaneous sway (r = 0.48-0.71; P ≤ 0.044) and were still elevated on day 6 post-bed rest. This reveals that individual sway responses may be inappropriately oriented, a finding masked by the averaging process. Our results confirm that impaired balance following prolonged bedrest is not related to loss of strength. Rather, they demonstrate that the sensorimotor transformation process which converts vestibular feedback into appropriately directed balance responses is impaired. KEY POINTS: Prolonged inactivity impairs balance but previous research suggests this is not caused by loss of strength. Here we investigated vestibular control of balance before and after 60 days of bed rest using electrical vestibular stimulation (EVS) to evoke sway responses. Spontaneous sway significantly increased and muscle strength reduced following bed rest, but, in keeping with previous research, these two effects were not correlated. While the overall accuracy of EVS-evoked sway responses was unaffected, their directional variability significantly increased following bed rest, and this was correlated with the increases in spontaneous sway. We have shown that the ability to transform head-centred vestibular feedback into an appropriately directed body sway response is negatively affected by prolonged inactivity; this may contribute to the impaired balance commonly observed following bed rest.
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Affiliation(s)
- Stuart W Mackenzie
- School of Sport, Exercise & Rehabilitation Sciences, University of Birmingham, Birmingham, UK
| | - Craig P Smith
- School of Sport, Exercise & Rehabilitation Sciences, University of Birmingham, Birmingham, UK
| | - Malcom F Tremblay
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, Canada
| | - Brian L Day
- Department of Clinical and Movement Neurosciences, University College London, London, UK
| | - Raymond F Reynolds
- School of Sport, Exercise & Rehabilitation Sciences, University of Birmingham, Birmingham, UK
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Trappe TA, Minchev K, Perkins RK, Lavin KM, Jemiolo B, Ratchford SM, Claiborne A, Lee GA, Finch WH, Ryder JW, Ploutz-Snyder L, Trappe SW. NASA SPRINT exercise program efficacy for vastus lateralis and soleus skeletal muscle health during 70 days of simulated microgravity. J Appl Physiol (1985) 2024; 136:1015-1039. [PMID: 38328821 DOI: 10.1152/japplphysiol.00489.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 12/21/2023] [Accepted: 02/05/2024] [Indexed: 02/09/2024] Open
Abstract
The efficacy of the NASA SPRINT exercise countermeasures program for quadriceps (vastus lateralis) and triceps surae (soleus) skeletal muscle health was investigated during 70 days of simulated microgravity. Individuals completed 6° head-down-tilt bedrest (BR, n = 9), bedrest with resistance and aerobic exercise (BRE, n = 9), or bedrest with resistance and aerobic exercise and low-dose testosterone (BRE + T, n = 8). All groups were periodically tested for muscle (n = 9 times) and aerobic (n = 4 times) power during bedrest. In BR, surprisingly, the typical bedrest-induced decrements in vastus lateralis myofiber size and power were either blunted (myosin heavy chain, MHC I) or eliminated (MHC IIa), along with no change (P > 0.05) in %MHC distribution and blunted quadriceps atrophy. In BRE, MHC I (vastus lateralis and soleus) and IIa (vastus lateralis) contractile performance was maintained (P > 0.05) or increased (P < 0.05). Vastus lateralis hybrid fiber percentage was reduced (P < 0.05) and energy metabolism enzymes and capillarization were generally maintained (P > 0.05), while not all of these positive responses were observed in the soleus. Exercise offsets 100% of quadriceps and approximately two-thirds of soleus whole muscle mass loss. Testosterone (BRE + T) did not provide any benefit over exercise alone for either muscle and for some myocellular parameters appeared detrimental. In summary, the periodic testing likely provided a partial exercise countermeasure for the quadriceps in the bedrest group, which is a novel finding given the extremely low exercise dose. The SPRINT exercise program appears to be viable for the quadriceps; however, refinement is needed to completely protect triceps surae myocellular and whole muscle health for astronauts on long-duration spaceflights.NEW & NOTEWORTHY This study provides unique exercise countermeasures development information for astronauts on long-duration spaceflights. The NASA SPRINT program was protective for quadriceps myocellular and whole muscle health, whereas the triceps surae (soleus) was only partially protected as has been shown with other programs. The bedrest control group data may provide beneficial information for overall exercise dose and targeting fast-twitch muscle fibers. Other unique approaches for the triceps surae are needed to supplement existing exercise programs.
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Affiliation(s)
- Todd A Trappe
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Kiril Minchev
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Ryan K Perkins
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Kaleen M Lavin
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Bozena Jemiolo
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Stephen M Ratchford
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Alex Claiborne
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Gary A Lee
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - W Holmes Finch
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Jeffrey W Ryder
- Universities Space Research Association, NASA Johnson Space Center, Houston, Texas, United States
| | - Lori Ploutz-Snyder
- Universities Space Research Association, NASA Johnson Space Center, Houston, Texas, United States
| | - Scott W Trappe
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
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13
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Rothaus K, Brown C. Evaluation of a Combination Approach to Improving Muscle Tone and Decreasing Subcutaneous Tissue Thickness Using a Sequential, Dual-Modality, Energy-Based Device. Aesthet Surg J Open Forum 2024; 6:ojae024. [PMID: 38938929 PMCID: PMC11210056 DOI: 10.1093/asjof/ojae024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024] Open
Abstract
Background The body shaping market has long been at the forefront of the aesthetic industry. With technological advances, patient demand for body sculpting in terms of reduction in subcutaneous tissue and enhancement of muscle has seen continual growth. Several devices have emerged in the space; however, few achieve both subcutaneous tissue reduction (SQR) and voluntary muscle increase (VMI) as measured by thickness, during the same treatment session. Objectives This article presents the results of a pilot study on a unique approach to subcutaneous tissue reduction and increasing muscle thickness using a dual-modality, energy-based device. Methods Twelve compliant patients (8 females and 4 males with an average age of 40 years) were enrolled in this single center, prospective study. All patients were treated with the dual-modality device (850 nm superluminescent diode matrix and electrical muscle stimulation), with external applicators being placed over the lower abdomen. The patients received 5 weekly treatments. Ultrasound measurements, photographs, weight, and waist measurements were taken at baseline, prior to the start of the fifth treatment, and at the 2-week and 2-month follow-up visits. Results At the 2-month follow-up visit, the average SQR was 34.03% and the VMI measured 22.97% in all patients who completed the study. All patient and physician evaluations rated the results as satisfactory or better. There were no complications. Conclusions Preliminary data show this dual-modality, electrical muscle stimulation/superluminescent diode matrix system provides both a safe and effective treatment for the reduction of subcutaneous tissue thickness and an increase in muscle definition and thickness. Objective and subjective evaluations demonstrated high levels of efficacy and satisfaction in all patients. Level of Evidence 2
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Affiliation(s)
- Kenneth Rothaus
- Corresponding Author: Dr Kenneth Rothaus, 325 East 72nd Street, New York, NY 10021, USA. E-mail: ; Instagram: @rothaus_md
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Bonmatí-Carrión MÁ, Santhi N, Atzori G, Mendis J, Kaduk S, Dijk DJ, Archer SN. Effect of 60 days of head down tilt bed rest on amplitude and phase of rhythms in physiology and sleep in men. NPJ Microgravity 2024; 10:42. [PMID: 38553471 PMCID: PMC10980770 DOI: 10.1038/s41526-024-00387-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 03/13/2024] [Indexed: 04/02/2024] Open
Abstract
Twenty-four-hour rhythms in physiology and behaviour are shaped by circadian clocks, environmental rhythms, and feedback of behavioural rhythms onto physiology. In space, 24 h signals such as those associated with the light-dark cycle and changes in posture, are weaker, potentially reducing the robustness of rhythms. Head down tilt (HDT) bed rest is commonly used to simulate effects of microgravity but how HDT affects rhythms in physiology has not been extensively investigated. Here we report effects of -6° HDT during a 90-day protocol on 24 h rhythmicity in 20 men. During HDT, amplitude of light, motor activity, and wrist-temperature rhythms were reduced, evening melatonin was elevated, while cortisol was not affected during HDT, but was higher in the morning during recovery when compared to last session of HDT. During recovery from HDT, time in Slow-Wave Sleep increased. EEG activity in alpha and beta frequencies increased during NREM and REM sleep. These results highlight the profound effects of head-down-tilt-bed-rest on 24 h rhythmicity.
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Affiliation(s)
- María-Ángeles Bonmatí-Carrión
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK.
- Chronobiology Laboratory, Department of Physiology, IMIB-Arrixaca, University of Murcia, Murcia, Spain.
- CIBER de Fragilidad y Envejecimiento Saludable, Instituto de Salud Carlos III, Madrid, Spain.
| | - Nayantara Santhi
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
- Department of Psychology, Northumbria University, Newcastle Upon Tyne, UK
| | - Giuseppe Atzori
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Jeewaka Mendis
- Surrey Clinical Trials Unit, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Sylwia Kaduk
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Derk-Jan Dijk
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
- UK Dementia Research Institute Care Research and Technology Centre, Imperial College London and the University of Surrey, Guildford, UK
| | - Simon N Archer
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK.
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Clouette J, Potvin-Desrochers A, Seo F, Churchward-Venne TA, Paquette C. Reorganization of Brain Resting-state Functional Connectivity Following 14 Days of Elbow Immobilization in Young Females. Neuroscience 2024; 540:77-86. [PMID: 38246474 DOI: 10.1016/j.neuroscience.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 12/12/2023] [Accepted: 01/09/2024] [Indexed: 01/23/2024]
Abstract
Limb immobilization is known to cause significant decreases in muscle strength and muscle mass as early as two days following the onset of immobilization. However, the decline in strength surpasses the decline in muscle mass, suggesting that factors in addition to muscle loss, such as neuroplasticity, contribute to the decrease in force production. However, little is known regarding immobilization-induced neural changes, although sensorimotor regions seem to be the most affected. The present study aimed to determine whether brain functional organization is altered following 14 days of unilateral elbow immobilization. Functional organization was quantified using resting-state functional connectivity, a measure of the synchronicity of the spontaneous discharge of different brain regions at rest. Data was obtained from twelve healthy young females before and after completing the immobilization period. A seed-to-voxel analysis was performed using seeds associated with cortical, subcortical, and cerebellar sensorimotor regions of the brain. The results showed changes predominantly involving cerebellar connectivity. For example, the immobilization period caused a decrease in connectivity between the motor cerebellar region of the immobilized arm and the left temporal lobe, and an increase between the same cerebellar region and the supplementary motor area. Overall, changes in connectivity occurred in regions typically associated with error detection and motor learning, suggesting a potential functional reorganization of the brain within 14 days of elbow immobilization.
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Affiliation(s)
- Julien Clouette
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Ave., Montreal, Quebec, Canada; Centre for Interdisciplinary Research in Rehabilitation, 6363 Hudson Road, Montreal, Quebec, Canada
| | - Alexandra Potvin-Desrochers
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Ave., Montreal, Quebec, Canada; Integrated Program in Neuroscience, McGill University, 1033 Pine Ave., Montreal, Quebec, Canada; Centre for Interdisciplinary Research in Rehabilitation, 6363 Hudson Road, Montreal, Quebec, Canada
| | - Freddie Seo
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Ave., Montreal, Quebec, Canada
| | - Tyler A Churchward-Venne
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Ave., Montreal, Quebec, Canada; Division of Geriatric Medicine, McGill University, 1650 Cedar Ave., Montreal, Quebec, Canada; Research Institute of the McGill University Health Centre, 1001 Decarie Boulevard, Montreal, Quebec, Canada
| | - Caroline Paquette
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Ave., Montreal, Quebec, Canada; Integrated Program in Neuroscience, McGill University, 1033 Pine Ave., Montreal, Quebec, Canada; Centre for Interdisciplinary Research in Rehabilitation, 6363 Hudson Road, Montreal, Quebec, Canada.
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16
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Buescher FM, Schmitz MT, Frett T, Kramme J, de Boni L, Elmenhorst EM, Mulder E, Moestl S, Heusser K, Frings-Meuthen P, Jordan J, Rittweger J, Pesta D. Effects of 30 days bed rest and exercise countermeasures on PBMC bioenergetics. Acta Physiol (Oxf) 2024; 240:e14102. [PMID: 38294173 DOI: 10.1111/apha.14102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/27/2023] [Accepted: 01/08/2024] [Indexed: 02/01/2024]
Abstract
AIM Altered mitochondrial function across various tissues is a key determinant of spaceflight-induced physical deconditioning. In comparison to tissue biopsies, blood cell bioenergetics holds promise as a systemic and more readily accessible biomarker, which was evaluated during head-down tilt bed rest (HDTBR), an established ground-based analog for spaceflight-induced physiological changes in humans. More specifically, this study explored the effects of HDTBR and an exercise countermeasure on mitochondrial respiration in peripheral blood mononuclear cells (PBMCs). METHODS We subjected 24 healthy participants to a strict 30-day HDTBR protocol. The control group (n = 12) underwent HDTBR only, while the countermeasure group (n = 12) engaged in regular supine cycling exercise followed by veno-occlusive thigh cuffs post-exercise for 6 h. We assessed routine blood parameters 14 days before bed rest, the respiratory capacity of PBMCs via high-resolution respirometry, and citrate synthase activity 2 days before and at day 30 of bed rest. We confirmed PBMC composition by flow cytometry. RESULTS The change of the PBMC maximal oxidative phosphorylation capacity (OXPHOS) amounted to an 11% increase in the countermeasure group, while it decreased by 10% in the control group (p = 0.04). The limitation of OXPHOS increased in control only while other respiratory states were not affected by either intervention. Correlation analysis revealed positive associations between white blood cells, lymphocytes, and basophils with PBMC bioenergetics in both groups. CONCLUSION This study reveals that a regular exercise countermeasure has a positive impact on PBMC mitochondrial function, confirming the potential application of blood cell bioenergetics for human spaceflight.
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Affiliation(s)
- F-M Buescher
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - M T Schmitz
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
- Institute of Medical Biometry, Informatics and Epidemiology, Medical Faculty, University of Bonn, Bonn, Germany
| | - T Frett
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - J Kramme
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
- Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Cologne, Germany
| | - L de Boni
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - E M Elmenhorst
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - E Mulder
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - S Moestl
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - K Heusser
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - P Frings-Meuthen
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - J Jordan
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
- Medical Faculty, University of Cologne, Cologne, Germany
| | - J Rittweger
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - D Pesta
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
- Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Cologne, Germany
- Medical Faculty, University of Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
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Zampieri S, Bersch I, Smeriglio P, Barbieri E, Boncompagni S, Maccarone MC, Carraro U. Program with last minute abstracts of the Padua Days on Muscle and Mobility Medicine, 27 February - 2 March, 2024 (2024Pdm3). Eur J Transl Myol 2024; 34:12346. [PMID: 38305708 PMCID: PMC11017178 DOI: 10.4081/ejtm.2024.12346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 02/01/2024] [Indexed: 02/03/2024] Open
Abstract
During the 2023 Padua Days on Muscle and Mobility Medicine the 2024 meeting was scheduled from 28 February to 2 March 2024 (2024Pdm3). During autumn 2023 the program was expanded with Scientific Sessions which will take place over five days (in 2024 this includes February 29), starting from the afternoon of 27 February 2024 in the Conference Rooms of the Hotel Petrarca, Thermae of Euganean Hills (Padua), Italy. As per consolidated tradition, the second day will take place in Padua, for the occasion in the Sala San Luca of the Monastery of Santa Giustina in Prato della Valle, Padua, Italy. Confirming the attractiveness of the Padua Days on Muscle and Mobility Medicine, over 100 titles were accepted until 15 December 2023 (many more than expected), forcing the organization of parallel sessions on both 1 and 2 March 2024. The five days will include lectures and oral presentations of scientists and clinicians from Argentina, Austria, Belgium, Brazil, Bulgaria, Canada, Denmark, Egypt, France, Germany, Iceland, Ireland, Italy, Romania, Russia, Slovenia, Switzerland, UK and USA. Only Australia, China, India and Japan are missing from this edition. But we are confident that authors from those countries who publish articles in the PAGEpress: European Journal of Translational Myology (EJTM: 2022 ESCI Clarivate's Impact Factor: 2.2; SCOPUS Cite Score: 3.2) will decide to join us in the coming years. Together with the program established by 31 January 2024, the abstracts will circulate during the meeting only in the electronic version of the EJTM Issue 34 (1) 2024. See you soon in person at the Hotel Petrarca in Montegrotto Terme, Padua, for the inauguration scheduled the afternoon of 27 February 2024 or on-line for free via Zoom. Send us your email address if you are not traditional participants listed in Pdm3 and EJTM address books.
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Affiliation(s)
- Sandra Zampieri
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padua, Italy; Department of Biomedical Sciences, University of Padova, Padua, Italy; Interdepartmental Research Centre of Myology, University of Padova, Padua, Italy; Armando Carraro & Carmela Mioni-Carraro Foundation for Translational Myology, Padua.
| | - Ines Bersch
- Swiss Paraplegic Centre Nottwil, Nottwil, Switzerland; International FES Centre®, Swiss Paraplegic Centre Nottwil, Nottwil.
| | - Piera Smeriglio
- Sorbonne Université, INSERM, Institut de Myologie, Centre de Recherche en Myologie, Paris.
| | - Elena Barbieri
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino (PU).
| | - Simona Boncompagni
- Center for Advanced Studies and Technology, University G. d'Annunzio of Chieti-Pescara, Chieti, Italy; Department of Neuroscience, Imaging and Clinical Sciences, University G. d'Annunzio of Chieti-Pescara, Chieti.
| | | | - Ugo Carraro
- Department of Biomedical Sciences, University of Padova, Padua, Italy; Interdepartmental Research Centre of Myology, University of Padova, Padua, Italy; Armando Carraro & Carmela Mioni-Carraro Foundation for Translational Myology, Padua.
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Dams K, De Meyer GR, Jacobs R, Schepens T, Perkisas S, Moorkens G, Jorens P. Combined ultrasound of m. quadriceps and diaphragm to determine the occurrence of sarcopenia and prolonged ventilation in a COVID-19 ICU cohort: The COVID-SARCUS trial. Nutrition 2024; 117:112250. [PMID: 37918311 DOI: 10.1016/j.nut.2023.112250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/29/2023] [Accepted: 09/27/2023] [Indexed: 11/04/2023]
Abstract
OBJECTIVE The aim of this study was to determine the development of sarcopenia in a COVID-19 intensive care unit population by sequential quadriceps and diaphragm ultrasound and its relationship with hospital outcomes. METHODS We assessed muscle thickness, cross-sectional area, fascicle length, pennation angle, and echo intensity within 48 h after intubation, at days 5 and 10 and at discharge from the intensive care unit in 30 critically ill patients with confirmed COVID-19. RESULTS A different evolution of muscle thickness of the diaphragm and m. rectus femoris was observed; the changes between the two muscles were not correlated (Pearson's χ2 3.91, P = 0.419). The difference in muscle thickness was linked to the outcome for both m. rectus femoris and diaphragm, with the best survival seen in the group with stable muscle thickness. The greatest loss of muscle thickness occurred between days 5 and 10. The echo intensity was higher in the patients with increased muscle thickness, who also had a worse prognosis. There was a correlation between cross-sectional area on day 5 and handgrip strength (r = 0.290, P = 0.010). Only 31% of patients were able to return to their preadmission residence without any additional rehabilitation. CONCLUSIONS Muscle atrophy and decline in muscle strength appear in the earliest stages after admission to the intensive care unit and are related to functional outcome.
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Affiliation(s)
- Karolien Dams
- Intensive Care Department, Antwerp University Hospital, Edegem, Belgium; Laboratory of Experimental Medicine and Paediatrics (LEMP), Faculty of Medicine and Health Sciences, Antwerp, Belgium.
| | - Gregory Ra De Meyer
- Intensive Care Department, Antwerp University Hospital, Edegem, Belgium; Laboratory of Experimental Medicine and Paediatrics (LEMP), Faculty of Medicine and Health Sciences, Antwerp, Belgium; Department of Anaesthesiology, Antwerp University Hospital, Edegem, Belgium
| | - Rita Jacobs
- Intensive Care Department, Antwerp University Hospital, Edegem, Belgium
| | - Tom Schepens
- Intensive Care Department, Antwerp University Hospital, Edegem, Belgium; Department of Intensive Care Medicine, Ghent University Hospital, Ghent, Belgium; Department of Internal Medicine and Paediatrics, Ghent University, Ghent, Belgium
| | - Stany Perkisas
- University Centre of Geriatrics, University of Antwerp, Antwerp, Belgium
| | - Greta Moorkens
- Department of Internal Medicine, Antwerp University Hospital, Edegem, Belgium
| | - Philippe Jorens
- Intensive Care Department, Antwerp University Hospital, Edegem, Belgium; Laboratory of Experimental Medicine and Paediatrics (LEMP), Faculty of Medicine and Health Sciences, Antwerp, Belgium
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Zhang Y, Chen K, Liu K, Wang Q, Ma Y, Pang B, Huang L, Ma Y. New prediction equations for knee isokinetic strength in young and middle-aged non-athletes. BMC Public Health 2023; 23:2558. [PMID: 38129858 PMCID: PMC10734189 DOI: 10.1186/s12889-023-17478-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023] Open
Abstract
BACKGROUND This study aimed to develop alternative prediction equations to predict isokinetic muscle strength at 60°/s based on anthropometric characteristics, including body mass, height, age, and sex for young and middle-aged non-athlete populations. METHODS Three hundred and thirty-two healthy non-athletic participants (174 females, 158 males) between 20 and 59 years underwent a 60°/s isokinetic knee joint concentric contraction test. Forty people were randomly selected for retesting to assess the reliability of the isokinetic instrument. Multivariate linear regression was used to establish extension peak torque (EPT) and flexion peak torque (FPT) prediction equations. Sixty extra participants were used individually to validate the prediction equations, and Bland Altman plots were constructed to assess the agreement of predicted values with actual measurements. RESULTS The result demonstrated that the instrument we used has excellent reliability. The multivariable linear regression model showed that body mass, age, and sex were significant predictors of PT (EPT: Adjusted R2 = 0.804, p < 0.001; FPT: Adjusted R2 = 0.705, p < 0.001). Furthermore, the equations we established had higher prediction accuracy than those of Gross et al. and Harbo et al. CONCLUSION: The equations developed in this study provided relatively low bias, thus providing a more suitable reference value for the knee isokinetic strength of young and middle-aged non-athletes.
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Affiliation(s)
- Ye Zhang
- Department of Rehabilitation Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Kang Chen
- Department of Rehabilitation Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Kun Liu
- Department of Rehabilitation Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Qingliang Wang
- Department of Rehabilitation Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Yuhui Ma
- Department of Rehabilitation Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Bo Pang
- Department of Rehabilitation Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Lihua Huang
- Department of Rehabilitation Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China.
| | - Yanhong Ma
- Department of Rehabilitation Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China.
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Papadopetraki A, Giannopoulos A, Maridaki M, Zagouri F, Droufakou S, Koutsilieris M, Philippou A. The Role of Exercise in Cancer-Related Sarcopenia and Sarcopenic Obesity. Cancers (Basel) 2023; 15:5856. [PMID: 38136400 PMCID: PMC10741686 DOI: 10.3390/cancers15245856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/03/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
One of the most common adverse effects of cancer and its therapeutic strategies is sarcopenia, a condition which is characterised by excess muscle wasting and muscle strength loss due to the disrupted muscle homeostasis. Moreover, cancer-related sarcopenia may be combined with the increased deposition of fat mass, a syndrome called cancer-associated sarcopenic obesity. Both clinical conditions have significant clinical importance and can predict disease progression and survival. A growing body of evidence supports the claim that physical exercise is a safe and effective complementary therapy for oncology patients which can limit the cancer- and its treatment-related muscle catabolism and promote the maintenance of muscle mass. Moreover, even after the onset of sarcopenia, exercise interventions can counterbalance the muscle mass loss and improve the clinical appearance and quality of life of cancer patients. The aim of this narrative review was to describe the various pathophysiological mechanisms, such as protein synthesis, mitochondrial function, inflammatory response, and the hypothalamic-pituitary-adrenal axis, which are regulated by exercise and contribute to the management of sarcopenia and sarcopenic obesity. Moreover, myokines, factors produced by and released from exercising muscles, are being discussed as they appear to play an important role in mediating the beneficial effects of exercise against sarcopenia.
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Affiliation(s)
- Argyro Papadopetraki
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (A.P.)
| | - Antonios Giannopoulos
- Section of Sports Medicine, Department of Community Medicine & Rehabilitation, Umeå University, 901 87 Umeå, Sweden;
- National Centre for Sport and Exercise Medicine (NCSEM), School of Sport, Exercise and Health Sciences, Loughborough University, Leicestershire LE11 3TU, UK
| | - Maria Maridaki
- Faculty of Physical Education and Sport Science, National and Kapodistrian University of Athens, 172 37 Dafne, Greece
| | - Flora Zagouri
- Department of Clinical Therapeutics, Alexandra Hospital, Medical School, National and Kapodistrian University of Athens, 115 28 Athens, Greece
| | | | - Michael Koutsilieris
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (A.P.)
| | - Anastassios Philippou
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (A.P.)
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21
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Hughes DC, Goodman CA, Baehr LM, Gregorevic P, Bodine SC. A critical discussion on the relationship between E3 ubiquitin ligases, protein degradation, and skeletal muscle wasting: it's not that simple. Am J Physiol Cell Physiol 2023; 325:C1567-C1582. [PMID: 37955121 PMCID: PMC10861180 DOI: 10.1152/ajpcell.00457.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/07/2023] [Accepted: 11/07/2023] [Indexed: 11/14/2023]
Abstract
Ubiquitination is an important post-translational modification (PTM) for protein substrates, whereby ubiquitin is added to proteins through the coordinated activity of activating (E1), ubiquitin-conjugating (E2), and ubiquitin ligase (E3) enzymes. The E3s provide key functions in the recognition of specific protein substrates to be ubiquitinated and aid in determining their proteolytic or nonproteolytic fates, which has led to their study as indicators of altered cellular processes. MuRF1 and MAFbx/Atrogin-1 were two of the first E3 ubiquitin ligases identified as being upregulated in a range of different skeletal muscle atrophy models. Since their discovery, the expression of these E3 ubiquitin ligases has often been studied as a surrogate measure of changes to bulk protein degradation rates. However, emerging evidence has highlighted the dynamic and complex regulation of the ubiquitin proteasome system (UPS) in skeletal muscle and demonstrated that protein ubiquitination is not necessarily equivalent to protein degradation. These observations highlight the potential challenges of quantifying E3 ubiquitin ligases as markers of protein degradation rates or ubiquitin proteasome system (UPS) activation. This perspective examines the usefulness of monitoring E3 ubiquitin ligases for determining specific or bulk protein degradation rates in the settings of skeletal muscle atrophy. Specific questions that remain unanswered within the skeletal muscle atrophy field are also identified, to encourage the pursuit of new research that will be critical in moving forward our understanding of the molecular mechanisms that govern protein function and degradation in muscle.
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Affiliation(s)
- David C Hughes
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States
| | - Craig A Goodman
- Centre for Muscle Research (CMR), Department of Anatomy and Physiology, The University of Melbourne, Parkville, Victoria, Australia
| | - Leslie M Baehr
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States
| | - Paul Gregorevic
- Centre for Muscle Research (CMR), Department of Anatomy and Physiology, The University of Melbourne, Parkville, Victoria, Australia
- Department of Neurology, The University of Washington School of Medicine, Seattle, Washington, United States
| | - Sue C Bodine
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States
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22
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Trappe TA, Tesch P, Alkner B, Trappe S. Microgravity-induced skeletal muscle atrophy in women and men: implications for long-duration spaceflights to the Moon and Mars. J Appl Physiol (1985) 2023; 135:1115-1119. [PMID: 37795533 PMCID: PMC10979826 DOI: 10.1152/japplphysiol.00412.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/28/2023] [Accepted: 09/28/2023] [Indexed: 10/06/2023] Open
Abstract
The inclusion of women on spaceflights has historically been limited. Recently, the first woman who will travel to the Moon was selected, and more women are participating in long-duration spaceflights. However, physiological data from real and simulated microgravity exposure are limited in women. This investigation studied women (n = 8, 34 ± 1 yr) and men (n = 9, 32 ± 1 yr) who underwent 2 (women) or 3 (men) mo of simulated microgravity (6° head-down tilt bed rest). Quadriceps and triceps surae muscle volumes were assessed via MRI before bed rest, bed rest day 29 (BR29, women and men), bed rest day 57 (BR57, women), and bed rest day 89 (BR89, men). Volume of both muscle groups decreased (P < 0.05) in women and men at all bed rest timepoints. Quadriceps muscle volume loss in women was greater than men at 1 mo (BR29: -17% vs. -10%, P < 0.05) and this 1-mo loss for women was similar to men at 3 mo (BR89: -18%, P > 0.05). In addition, the loss in women at 2 mo (BR57: -21%) exceeded men at 3 mo (P < 0.05). For the triceps surae, there was a trend for greater muscle volume loss in women compared with men at 1 mo (BR29: -18% vs. -16%, P = 0.08), and loss in women at 2 mo was similar to men at 3 mo (BR57: -29%, BR89: -29%, P > 0.05). The collective evidence suggests that women experience greater lower limb muscle atrophy than men at least through the first 4 mo of microgravity exposure. More sex-specific microgravity studies are needed to help protect the health of women traveling on long-duration orbital and interplanetary spaceflights.NEW & NOTEWORTHY This study adds to the limited evidence regarding sex-specific responses to real or simulated microgravity exposure, which collectively suggests a sex-specific muscle atrophy profile, with women losing more than men at least through the first 4 mo of weightlessness. Considering the increase in women being selected for space missions, including the first women to travel to the Moon, more physiological data on women in response to microgravity are needed.
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Affiliation(s)
- Todd A Trappe
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
| | - Per Tesch
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Björn Alkner
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Scott Trappe
- Human Performance Laboratory, Ball State University, Muncie, Indiana, United States
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23
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Spiering BA, Weakley J, Mujika I. Effects of Bed Rest on Physical Performance in Athletes: A Systematic and Narrative Review. Sports Med 2023; 53:2135-2146. [PMID: 37495758 PMCID: PMC10587175 DOI: 10.1007/s40279-023-01889-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2023] [Indexed: 07/28/2023]
Abstract
BACKGROUND Athletes can face scenarios in which they are confined to bed rest (e.g., due to injury or illness). Existing research in otherwise healthy individuals indicates that those entering bed rest with the greatest physical performance level might experience the greatest performance decrements, which indirectly suggests that athletes might be more susceptible to the detrimental consequences of bed rest than general populations. Therefore, a comprehensive understanding of the effects of bed rest might help guide the medical care of athletes during and following bed rest. OBJECTIVE This systematic and narrative review aimed to (1) establish the evidence for the effects of bed rest on physical performance in athletes; (2) discuss potential countermeasures to offset these negative consequences; and (3) identify the time-course of recovery following bed rest to guide return-to-sport rehabilitation. METHODS This review was performed using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Four databases were searched (SPORTDiscus, Web of Science, Scopus, and MEDLINE/PubMed) in October of 2022, and studies were included if they were peer-reviewed investigations, written in English, and investigated the effects of horizontal bed rest on changes in physical capacities and qualities in athletes (defined as Tier 3-5 participants). The reporting quality of the research was assessed using a modified version of the Downs & Black checklist. Furthermore, findings from studies that involved participants in Tiers 1-2 were presented and synthesized using a narrative approach. RESULTS Our systematic review of the literature using a rigorous criterion of 'athletes' revealed zero scientific publications. Nevertheless, as a by-product of our search, seven studies were identified that involved apparently healthy individuals who performed specific exercise training prior to bed rest. CONCLUSIONS Based on the limited evidence from studies involving non-athletes who were otherwise healthy prior to bed rest, we generally conclude that (1) bed rest rapidly (within 3 days) decreases upright endurance exercise performance, likely due to a rapid loss in plasma volume; whereas strength is reduced within 5 days, likely due to neural factors as well as muscle atrophy; (2) fluid/salt supplementation may be an effective countermeasure to protect against decrements in endurance performance during bed rest; while a broader array of potentially effective countermeasures exists, the efficacy of these countermeasures for previously exercise-trained individuals requires further study; and (3) athletes likely require at least 2-4 weeks of progressive rehabilitation following bed rest of ≤ 28 days, although the timeline of recovery might need to be extended depending on the underlying reason for bed rest (e.g., injury or illness). Despite these general conclusions from studies involving non-athletes, our primary conclusion is that substantial effort and research is still required to quantify the effects of bed rest on physical performance, identify effective countermeasures, and provide return-to-sport timelines in bona fide athletes. TRIAL REGISTRATION NUMBER AND DATE OF REGISTRATION Registration ID: osf.io/d3aew; Date: October 24, 2022.
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Affiliation(s)
- Barry A Spiering
- Sports Research Laboratory, New Balance Athletics, Inc., Boston, MA, USA
| | - Jonathon Weakley
- School of Behavioural and Health Sciences, Australian Catholic University, McAuley at Banyo, Brisbane, QLD, Australia.
- Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Brisbane, QLD, Australia.
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds, UK.
| | - Iñigo Mujika
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country, Leioa, Basque Country, Spain
- Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Universidad Finis Terrae, Santiago, Chile
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24
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Smeuninx B, Elhassan YS, Sapey E, Rushton AB, Morgan PT, Korzepa M, Belfield AE, Philp A, Brook MS, Gharahdaghi N, Wilkinson D, Smith K, Atherton PJ, Breen L. A single bout of prior resistance exercise attenuates muscle atrophy and declines in myofibrillar protein synthesis during bed-rest in older men. J Physiol 2023. [PMID: 37856286 DOI: 10.1113/jp285130] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 10/05/2023] [Indexed: 10/21/2023] Open
Abstract
Impairments in myofibrillar protein synthesis (MyoPS) during bed rest accelerate skeletal muscle loss in older adults, increasing the risk of adverse secondary health outcomes. We investigated the effect of prior resistance exercise (RE) on MyoPS and muscle morphology during a disuse event in 10 healthy older men (65-80 years). Participants completed a single bout of unilateral leg RE the evening prior to 5 days of in-patient bed-rest. Quadriceps cross-sectional area (CSA) was determined prior to and following bed-rest. Serial muscle biopsies and dual stable isotope tracers were used to determine rates of integrated MyoPS (iMyoPS) over a 7 day habitual 'free-living' phase and the bed-rest phase, and rates of acute postabsorptive and postprandial MyoPS (aMyoPS) at the end of bed rest. Quadriceps CSA at 40%, 60% and 80% of muscle length significantly decreased in exercised (EX) and non-exercised control (CTL) legs with bed-rest. The decline in quadriceps CSA at 40% and 60% of muscle length was attenuated in EX compared with CTL. During bed-rest, iMyoPS rates decreased from habitual values in CTL, but not EX, and were significantly different between legs. Postprandial aMyoPS rates increased above postabsorptive values in EX only. The change in iMyoPS over bed-rest correlated with the change in quadriceps CSA in CTL, but not EX. A single bout of RE attenuated the decline in iMyoPS rates and quadriceps atrophy with 5 days of bed-rest in older men. Further work is required to understand the functional and clinical implications of prior RE in older patient populations. KEY POINTS: Age-related skeletal muscle deterioration, linked to numerous adverse health outcomes, is driven by impairments in muscle protein synthesis that are accelerated during periods of disuse. Resistance exercise can stimulate muscle protein synthesis over several days of recovery and therefore could counteract impairments in this process that occur in the early phase of disuse. In the present study, we demonstrate that the decline in myofibrillar protein synthesis and muscle atrophy over 5 days of bed-rest in older men was attenuated by a single bout of unilateral resistance exercise performed the evening prior to bed-rest. These findings suggest that concise resistance exercise intervention holds the potential to support muscle mass retention in older individuals during short-term disuse, with implications for delaying sarcopenia progression in ageing populations.
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Affiliation(s)
- Benoit Smeuninx
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK
- Cellular & Molecular Metabolism Laboratory, Monash University, Melbourne, Victoria, Australia
| | - Yasir S Elhassan
- Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
- Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK
| | - Elizabeth Sapey
- Birmingham Acute Care Research Group, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK
| | - Alison B Rushton
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK
| | - Paul T Morgan
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK
| | - Marie Korzepa
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK
| | - Archie E Belfield
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK
| | - Andrew Philp
- Centre for Healthy Ageing, Centenary Institute, Camperdown, New South Wales, Australia
| | - Matthew S Brook
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, University of Nottingham, Derby, UK
| | - Nima Gharahdaghi
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, University of Nottingham, Derby, UK
| | - Daniel Wilkinson
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, University of Nottingham, Derby, UK
| | - Kenneth Smith
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, University of Nottingham, Derby, UK
| | - Philip J Atherton
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, University of Nottingham, Derby, UK
| | - Leigh Breen
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK
- MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Birmingham, Birmingham, UK
- NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, UK
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25
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Hajj-Boutros G, Sonjak V, Faust A, Hedge E, Mastrandrea C, Lagacé JC, St-Martin P, Naz Divsalar D, Sadeghian F, Chevalier S, Liu-Ambrose T, Blaber AP, Dionne IJ, Duchesne S, Hughson R, Kontulainen S, Theou O, Morais JA. Impact of 14 Days of Bed Rest in Older Adults and an Exercise Countermeasure on Body Composition, Muscle Strength, and Cardiovascular Function: Canadian Space Agency Standard Measures. Gerontology 2023; 69:1284-1294. [PMID: 37717560 PMCID: PMC10634275 DOI: 10.1159/000534063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 09/01/2023] [Indexed: 09/19/2023] Open
Abstract
INTRODUCTION Head-down bed rest (HDBR) has long been used as an analog to microgravity, and it also enables studying the changes occurring with aging. Exercise is the most effective countermeasure for the deleterious effects of inactivity. The aim of this study was to investigate the efficacy of an exercise countermeasure in healthy older participants on attenuating musculoskeletal deconditioning, cardiovascular fitness level, and muscle strength during 14 days of HDBR as part of the standard measures of the Canadian Space Agency. METHODS Twenty-three participants (12 males and 11 females), aged 55-65 years, were admitted for a 26-day inpatient stay at the McGill University Health Centre. After 5 days of baseline assessment tests, they underwent 14 days of continuous HDBR followed by 7 days of recovery with repeated tests. Participants were randomized to passive physiotherapy or an exercise countermeasure during the HDBR period consisting of 3 sessions per day of either high-intensity interval training (HIIT) or low-intensity cycling or strength exercises for the lower and upper body. Peak aerobic power (V̇O2peak) was determined using indirect calorimetry. Body composition was assessed by dual-energy X-ray absorptiometry, and several muscle group strengths were evaluated using an adjustable chair dynamometer. A vertical jump was used to assess whole-body power output, and a tilt test was used to measure cardiovascular and orthostatic challenges. Additionally, changes in various blood parameters were measured as well as the effects of exercise countermeasure on these measurements. RESULTS There were no differences at baseline in main characteristics between the control and exercise groups. The exercise group maintained V̇O2peak levels similar to baseline, whereas it decreased in the control group following 14 days of HDBR. Body weight significantly decreased in both groups. Total and leg lean masses decreased in both groups. However, total body fat mass decreased only in the exercise group. Isometric and isokinetic knee extension muscle strength were significantly reduced in both groups. Peak velocity, flight height, and flight time were significantly reduced in both groups with HDBR. CONCLUSION In this first Canadian HDBR study in older adults, an exercise countermeasure helped maintain aerobic fitness and lean body mass without affecting the reduction of knee extension strength. However, it was ineffective in protecting against orthostatic intolerance. These results support HIIT as a promising approach to preserve astronaut health and functioning during space missions, and to prevent deconditioning as a result of hospitalization in older adults.
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Affiliation(s)
- Guy Hajj-Boutros
- Research Institute of the McGill University Health Centre, Montréal, Québec, Canada,
| | - Vita Sonjak
- Research Institute of the McGill University Health Centre, Montréal, Québec, Canada
| | - Andréa Faust
- Research Institute of the McGill University Health Centre, Montréal, Québec, Canada
| | - Eric Hedge
- Department of Kinesiology, Schlegel-University of Waterloo Research Institute for Aging, Waterloo, Ontario, Canada
| | - Carmelo Mastrandrea
- Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, Ontario, Canada
| | - Jean-Christophe Lagacé
- Faculté des Sciences de l'activité Physique, Centre de Recherche sur le Vieillissement, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Philippe St-Martin
- Faculté des Sciences de l'activité Physique, Centre de Recherche sur le Vieillissement, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Donya Naz Divsalar
- Department of Biomedical Physiology and Kinesiology, Aerospace Physiology Laboratory, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Farshid Sadeghian
- Department of Biomedical Physiology and Kinesiology, Aerospace Physiology Laboratory, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Stéphanie Chevalier
- Research Institute of the McGill University Health Centre, Montréal, Québec, Canada
- School of Human Nutrition, McGill University, Montreal, Québec, Canada
| | - Teresa Liu-Ambrose
- Aging, Mobility and Cognitive Neuroscience Laboratory, Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Andrew P Blaber
- Department of Biomedical Physiology and Kinesiology, Aerospace Physiology Laboratory, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Isabelle J Dionne
- Faculté des Sciences de l'activité Physique, Centre de Recherche sur le Vieillissement, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Simon Duchesne
- Department of Radiology and Nuclear Medicine, Université Laval, Quebec City, Québec, Canada
- CERVO Brain Research Center, Quebec City, Québec, Canada
| | - Richard Hughson
- Department of Kinesiology, Schlegel-University of Waterloo Research Institute for Aging, Waterloo, Ontario, Canada
| | - Saija Kontulainen
- College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Olga Theou
- Division of Geriatric Medicine, Queen Elizabeth II Health Sciences Centre, Nova Scotia Health, Halifax, Nova Scotia, Canada
| | - José A Morais
- Research Institute of the McGill University Health Centre, Montréal, Québec, Canada
- Division of Geriatric Medicine, Faculty of Medicine, McGill University, Montreal, Québec, Canada
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26
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Mills G, Daynes E, McAuley HJ, Greening NJ, Briggs-Price S, Baldwin MM, Singh SJ. Resistance Training in Post-COVID Recovery: Rationale and Current Evidence. J Frailty Sarcopenia Falls 2023; 8:188-194. [PMID: 37663156 PMCID: PMC10472035 DOI: 10.22540/jfsf-08-188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/18/2023] [Indexed: 09/05/2023] Open
Abstract
During hospitalisation with COVID-19, individuals may experience prolonged periods of immobilisation. Combined with the inflammatory effects of the virus, this may lead to a significant reduction in both muscle mass and strength. Data from several long-term studies suggest that these symptoms may not fully resolve within one year. Owing to its effectiveness at inducing muscle fibre hypertrophy and improving neuromuscular efficiency, resistance training is of great interest in the rehabilitation of this population. This narrative review aims to identify the rationale and potential efficacy of resistance training for restoring physical function following infection with SARS-CoV-2, as well as evidence of its use in clinical practice. The studies included in this narrative review consisted mostly of multi-component rehabilitation trials. Of these, widespread improvements in muscle strength were reported using intensities of up to 80% of participants' 1-repetition-maximum. Evidence thus far indicates that resistance training may be safe and effective in patients following COVID-19, although its individual contribution is difficult to discern. Future exercise intervention studies investigating the efficacy of resistance training as a sole modality are needed.
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Affiliation(s)
- George Mills
- Centre of Exercise and Rehabilitation Science, NIHR Biomedical Research Centre – Respiratory, University Hospitals Leicester, Leicester, UK
| | - Enya Daynes
- Centre of Exercise and Rehabilitation Science, NIHR Biomedical Research Centre – Respiratory, University Hospitals Leicester, Leicester, UK
- Department of Respiratory Sciences, University of Leicester, Leicester, UK
| | - Hamish J.C. McAuley
- Centre of Exercise and Rehabilitation Science, NIHR Biomedical Research Centre – Respiratory, University Hospitals Leicester, Leicester, UK
- Department of Respiratory Sciences, University of Leicester, Leicester, UK
| | - Neil J. Greening
- Centre of Exercise and Rehabilitation Science, NIHR Biomedical Research Centre – Respiratory, University Hospitals Leicester, Leicester, UK
- Department of Respiratory Sciences, University of Leicester, Leicester, UK
| | - Samuel Briggs-Price
- Centre of Exercise and Rehabilitation Science, NIHR Biomedical Research Centre – Respiratory, University Hospitals Leicester, Leicester, UK
- Department of Respiratory Sciences, University of Leicester, Leicester, UK
| | - Molly M. Baldwin
- Centre of Exercise and Rehabilitation Science, NIHR Biomedical Research Centre – Respiratory, University Hospitals Leicester, Leicester, UK
| | - Sally J. Singh
- Centre of Exercise and Rehabilitation Science, NIHR Biomedical Research Centre – Respiratory, University Hospitals Leicester, Leicester, UK
- Department of Respiratory Sciences, University of Leicester, Leicester, UK
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27
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Klassen PN, Baracos V, Ghosh S, Martin L, Sawyer MB, Mazurak VC. Muscle and Adipose Wasting despite Disease Control: Unaddressed Side Effects of Palliative Chemotherapy for Pancreatic Cancer. Cancers (Basel) 2023; 15:4368. [PMID: 37686641 PMCID: PMC10486774 DOI: 10.3390/cancers15174368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/21/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023] Open
Abstract
Muscle and adipose wasting during chemotherapy for advanced pancreatic cancer (aPC) are associated with poor outcomes. We aimed to quantify the contributions of chemotherapy regimen and tumour progression to muscle and adipose wasting and evaluate the prognostic value of each tissue loss. Of all patients treated for aPC from 2013-2019 in Alberta, Canada (n = 504), computed-tomography (CT)-defined muscle and adipose tissue index changes (∆SMI, ∆ATI, cm2/m2) were measured for patients with CT images available both prior to and 12 ± 4 weeks after chemotherapy initiation (n = 210). Contributions of regimen and tumour response to tissue change were assessed with multivariable linear regression. Survival impacts were assessed with multivariable Cox's proportional hazards models. Tissue changes varied widely (∆SMI: -17.8 to +7.3 cm2/m2, ∆ATI: -106.1 to +37.7 cm2/m2) over 116 (27) days. Tumour progression contributed to both muscle and adipose loss (-3.2 cm2/m2, p < 0.001; -12.4 cm2/m2, p = 0.001). FOLFIRINOX was associated with greater muscle loss (-1.6 cm2/m2, p = 0.013) and GEM/NAB with greater adipose loss (-11.2 cm2/m2, p = 0.002). The greatest muscle and adipose losses were independently associated with reduced survival (muscle: HR 1.72, p = 0.007; adipose: HR 1.73, p = 0.012; tertile 1 versus tertile 3). Muscle and adipose losses are adverse effects of chemotherapy and may require regimen-specific management strategies.
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Affiliation(s)
- Pamela N. Klassen
- Department of Agricultural, Food & Nutritional Sciences, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Vickie Baracos
- Department of Oncology, University of Alberta, Edmonton, AB T6G 2P5, Canada
| | - Sunita Ghosh
- Department of Oncology, University of Alberta, Edmonton, AB T6G 2P5, Canada
| | - Lisa Martin
- Nutrition Services, Alberta Health Services, Edmonton, AB T5J 3E4, Canada
| | - Michael B. Sawyer
- Department of Oncology, University of Alberta, Edmonton, AB T6G 2P5, Canada
| | - Vera C. Mazurak
- Department of Agricultural, Food & Nutritional Sciences, University of Alberta, Edmonton, AB T6G 2R3, Canada
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28
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Šlosar L, Peskar M, Pišot R, Marusic U. Environmental enrichment through virtual reality as multisensory stimulation to mitigate the negative effects of prolonged bed rest. Front Aging Neurosci 2023; 15:1169683. [PMID: 37674784 PMCID: PMC10477372 DOI: 10.3389/fnagi.2023.1169683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 08/07/2023] [Indexed: 09/08/2023] Open
Abstract
Prolonged bed rest causes a multitude of deleterious physiological changes in the human body that require interventions even during immobilization to prevent or minimize these negative effects. In addition to other interventions such as physical and nutritional therapy, non-physical interventions such as cognitive training, motor imagery, and action observation have demonstrated efficacy in mitigating or improving not only cognitive but also motor outcomes in bedridden patients. Recent technological advances have opened new opportunities to implement such non-physical interventions in semi- or fully-immersive environments to enable the development of bed rest countermeasures. Extended Reality (XR), which covers augmented reality (AR), mixed reality (MR), and virtual reality (VR), can enhance the training process by further engaging the kinesthetic, visual, and auditory senses. XR-based enriched environments offer a promising research avenue to investigate the effects of multisensory stimulation on motor rehabilitation and to counteract dysfunctional brain mechanisms that occur during prolonged bed rest. This review discussed the use of enriched environment applications in bedridden patients as a promising tool to improve patient rehabilitation outcomes and suggested their integration into existing treatment protocols to improve patient care. Finally, the neurobiological mechanisms associated with the positive cognitive and motor effects of an enriched environment are highlighted.
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Affiliation(s)
- Luka Šlosar
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
- Alma Mater Europaea – ECM, Department of Health Sciences, Maribor, Slovenia
| | - Manca Peskar
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
- Biological Psychology and Neuroergonomics, Department of Psychology and Ergonomics, Faculty V: Mechanical Engineering and Transport Systems, Technische Universität Berlin, Berlin, Germany
| | - Rado Pišot
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
| | - Uros Marusic
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
- Alma Mater Europaea – ECM, Department of Health Sciences, Maribor, Slovenia
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Thomasius F, Pesta D, Rittweger J. Adjuvant pharmacological strategies for the musculoskeletal system during long-term space missions. Br J Clin Pharmacol 2023. [PMID: 37559171 DOI: 10.1111/bcp.15877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/29/2023] [Accepted: 08/01/2023] [Indexed: 08/11/2023] Open
Abstract
Despite 2 h of daily exercise training, muscle wasting and bone loss are still present after 6-month missions to the international space station. Some crew members lose bone much faster than others. In preparation for missions to the Moon and Mars, space agencies are therefore reviewing their countermeasure portfolios. Here, we discuss the potential of current pharmacological strategies. Bone loss in space is fuelled by bone resorption. Alendronate, an oral bisphosphonate, reduced bone losses in experimental bed rest and space. However, gastrointestinal side effects precluded its further utilization in space. Zoledronate (a potent bisphosphonate), denosumab (RANKL antagonist) and romosozumab (sclerostin antagonist) are all administered via injection. They effectively suppress bone resorption and are routinely prescribed against osteoporosis. Their serious adverse effects, namely, osteonecrosis of the jaw and atypical femur fractures occur very rarely when the usage is limited to 1 or 2 years. Hence, utilization of one of these compounds may outweigh the bone risks of space travelling, in particular in those with high bone resorption rates. Muscle wasting in space is likely due to hampered muscle protein synthesis. Even though this might theoretically be countered by the synthesis-boosting effects of anabolic steroids, the practical grounds for such recommendation are currently weak. Moreover, they reveal their full potential only when combined with an anabolic exercise stimulus, for example, via strength training. It therefore seems that a combination of exercise and pharmacological countermeasures should be considered for musculoskeletal health on the way to the Moon and Mars and back.
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Affiliation(s)
| | - Dominik Pesta
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
- Centre for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University Hospital Cologne, Cologne, Germany
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Stratis D, Trudel G, Rocheleau L, Pelchat M, Laneuville O. The transcriptome response of astronaut leukocytes to long missions aboard the International Space Station reveals immune modulation. Front Immunol 2023; 14:1171103. [PMID: 37426644 PMCID: PMC10324659 DOI: 10.3389/fimmu.2023.1171103] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/18/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Spaceflight leads to the deconditioning of multiple body systems including the immune system. We sought to characterize the molecular response involved by capturing changes in leukocyte transcriptomes from astronauts transitioning to and from long-duration spaceflight. Methods Fourteen male and female astronauts with ~6-month- long missions aboard the International Space Station (ISS) had 10 blood samples collected throughout the three phases of the study: one pre-flight (PF), four in-flight (IF) while onboard the ISS, and five upon return to Earth (R). We measured gene expression through RNA sequencing of leukocytes and applied generalized linear modeling to assess differential expression across all 10 time points followed by the analysis of selected time points and functional enrichment of changing genes to identify shifts in biological processes. Results Our temporal analysis identified 276 differentially expressed transcripts grouped into two clusters (C) showing opposite profiles of expression with transitions to and from spaceflight: (C1) decrease-then-increase and (C2) increase-then-decrease. Both clusters converged toward average expression between ~2 and ~6 months in space. Further analysis of spaceflight transitions identified the decrease-then-increase pattern with most changes: 112 downregulated genes between PF and early spaceflight and 135 upregulated genes between late IF and R. Interestingly, 100 genes were both downregulated when reaching space and upregulated when landing on Earth. Functional enrichment at the transition to space related to immune suppression increased cell housekeeping functions and reduced cell proliferation. In contrast, egress to Earth is related to immune reactivation. Conclusion The leukocytes' transcriptome changes describe rapid adaptations in response to entering space followed by opposite changes upon returning to Earth. These results shed light on immune modulation in space and highlight the major adaptive changes in cellular activity engaged to adapt to extreme environments.
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Affiliation(s)
- Daniel Stratis
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, ON, Canada
| | - Guy Trudel
- Bone and Joint Research Laboratory, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- Department of Medicine, Division of Physiatry, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Lynda Rocheleau
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Martin Pelchat
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Odette Laneuville
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, ON, Canada
- Bone and Joint Research Laboratory, Ottawa Hospital Research Institute, Ottawa, ON, Canada
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Kara JAS, Zange J, Hoffman F, Tank J, Jordan J, Semler O, Schönau E, Rittweger J, Seefried L. Impaired Physical Performance in X-linked Hypophosphatemia Is not Caused by Depleted Muscular Phosphate Stores. J Clin Endocrinol Metab 2023; 108:1634-1645. [PMID: 37043477 DOI: 10.1210/clinem/dgad210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/19/2023] [Accepted: 04/10/2023] [Indexed: 04/13/2023]
Abstract
CONTEXT X-linked hypophosphatemia (XLH) is a rare genetic disease, characterized by renal phosphate wasting and complex musculoskeletal manifestations including decreased physical performance. OBJECTIVE To characterize muscular deficits in patients with XLH and investigate phosphate stores in muscles. METHODS Case-control study (Muscle fatigability in X-linked Hypophosphatemia [MuXLiH]) with a 1-time assessment at the German Aerospace Center (DLR), Cologne, from May to December 2019, including patients with XLH cared for at the Osteology Department, University of Wuerzburg. Thirteen patients with XLH and 13 age/sex/body weight-matched controls aged 18-65 years were included. The main outcome measure was 31P-magnetic resonance spectroscopy (31P-MRS)-based assessment of phosphate metabolites in the soleus muscle at rest. Further analyses included magnetic resonance imaging-based muscle volume measurement, laboratory testing, isokinetic maximum voluntary contraction (MVC), fatigue testing, and jumping mechanography. RESULTS By means of 31P-MRS, no significant differences were observed between XLH and controls regarding phosphate metabolites except for a slightly increased phosphocreatine to inorganic phosphate (PCr/Pi) ratio (XLH: 13.44 ± 3.22, control: 11.01 ± 2.62, P = .023). Quadriceps muscle volume was reduced in XLH (XLH: 812.1 ± 309.0 mL, control: 1391.1 ± 306.2 mv, P < .001). No significant differences were observed regarding isokinetic maximum torque (MVC) adjusted to quadriceps muscle volume. Jumping peak power and jump height were significantly reduced in XLH vs controls (both P < .001). CONCLUSION The content of phosphoric compounds within the musculature of patients with XLH was not observed to be different from controls. Volume-adjusted muscle strength and fatiguability were not different either. Reduced physical performance in patients with XLH may result from long-term adaptation to reduced physical activity due to skeletal impairment.
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Affiliation(s)
| | - Jochen Zange
- German Aerospace Center, Institute of Aerospace Medicine, 51147 Cologne, Germany
| | - Fabian Hoffman
- German Aerospace Center, Institute of Aerospace Medicine, 51147 Cologne, Germany
| | - Jens Tank
- German Aerospace Center, Institute of Aerospace Medicine, 51147 Cologne, Germany
| | - Jens Jordan
- German Aerospace Center, Institute of Aerospace Medicine, 51147 Cologne, Germany
| | - Oliver Semler
- Department of Pediatrics and Adolescent Medicine, University of Cologne, University Hospital Cologne, 50937 Cologne, Germany
| | - Eckhard Schönau
- Department of Pediatrics and Adolescent Medicine, University of Cologne, University Hospital Cologne, 50937 Cologne, Germany
| | - Jörn Rittweger
- German Aerospace Center, Institute of Aerospace Medicine, 51147 Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University of Cologne, University Hospital Cologne, 50937 Cologne, Germany
| | - Lothar Seefried
- Osteology and Clinical Trial Unit, Orthopedic Department, Julius Maximillian University Würzburg, 97074 Würzburg, Germany
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Deng J, Cohen DJ, Berger MB, Sabalewski EL, McClure MJ, Boyan BD, Schwartz Z. Osseointegration of Titanium Implants in a Botox-Induced Muscle Paralysis Rat Model Is Sensitive to Surface Topography and Semaphorin 3A Treatment. Biomimetics (Basel) 2023; 8:biomimetics8010093. [PMID: 36975323 PMCID: PMC10046785 DOI: 10.3390/biomimetics8010093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 02/06/2023] [Accepted: 02/22/2023] [Indexed: 03/03/2023] Open
Abstract
Reduced skeletal loading associated with many conditions, such as neuromuscular injuries, can lead to bone fragility and may threaten the success of implant therapy. Our group has developed a botulinum toxin A (botox) injection model to imitate disease-reduced skeletal loading and reported that botox dramatically impaired the bone formation and osseointegration of titanium implants. Semaphorin 3A (sema3A) is an osteoprotective factor that increases bone formation and inhibits bone resorption, indicating its potential therapeutic role in improving osseointegration in vivo. We first evaluated the sema3A effect on whole bone morphology following botox injections by delivering sema3A via injection. We then evaluated the sema3A effect on the osseointegration of titanium implants with two different surface topographies by delivering sema3A to cortical bone defect sites prepared for implant insertion and above the implants after insertion using a copper-free click hydrogel that polymerizes rapidly in situ. Implants had hydrophobic smooth surfaces (PT) or multiscale biomimetic micro/nano topography (SLAnano). Sema3A rescued the botox-impaired bone formation. Furthermore, biomimetic Ti implants improved the bone-to-implant contact (BIC) and mechanical properties of the integrated bone in the botox-treated rats, which sema3A enhanced. This study demonstrated the value of biomimetic approaches combining multiscale topography and biologics in improving the clinical outcomes of implant therapy.
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Affiliation(s)
- Jingyao Deng
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
- VCU DaVinci Center for Innovation, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - D. Joshua Cohen
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Michael B. Berger
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Eleanor L. Sabalewski
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Michael J. McClure
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Barbara D. Boyan
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Correspondence: ; Fax: +1-804-828-9866
| | - Zvi Schwartz
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
- Department of Periodontics, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
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Vangelov B, Bauer J, Moses D, Smee R. Comparison of Skeletal Muscle Changes at Three Vertebral Levels Following Radiotherapy in Patients With Oropharyngeal Carcinoma. Nutr Cancer 2023; 75:572-581. [PMID: 36308327 DOI: 10.1080/01635581.2022.2138468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Evaluation of skeletal muscle (SM) depletion, or sarcopenia, utilizes the cross-sectional area (CSA) of computed tomography (CT) scans at the lumbar level L3. However, alternate vertebral landmarks are used in patients with head and neck cancer due to scan unavailability. Muscle changes following radiotherapy at cervical (C3) and thoracic (T2) levels were compared to L3 in patients with oropharyngeal carcinoma. Muscle density data were derived retrospectively from diagnostic PET-CT scans at C3, T2 and L3 pretreatment, and up to six months post. CSA changes were compared to L3 in scans of 33 patients (88% male, mean age 61 (SD 8.5) years). On matched pair analysis; mean L3-CSA change -12.1 cm2 (SD 9.7, 95%CI -15.5 to -8.6, and p < 0.001), T2-CSA -30.5 cm2 (SD 34.8, 95%CI -42.8 to -18.1, and p < 0.001) and C3-CSA +2.1 cm2 (SD 4.1, 95%CI 0.63 to 3.5, and p < 0.00). No difference was found in the percentage change of T2-CSA with L3-CSA (mean -2.2%, SD 10.6, 95%CI -6.0 to 1.6, and p = 0.240), however, was significantly different to C3-CSA (mean 13.2%, SD 11.6, 95%CI 9.1 to 17.3, and p < 0.001). Results suggest SM at C3 does not change proportionately and may not be a reliable representation of whole-body SM change over time.
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Affiliation(s)
- Belinda Vangelov
- Department of Radiation Oncology, Nelune Comprehensive Cancer Centre, Prince of Wales Hospital and Community Health Services, Randwick, New South Wales, Australia.,Prince of Wales Clinical School, Faculty of Medicine, University of New South Wales, Randwick, New South Wales, Australia
| | - Judith Bauer
- Department of Nutrition, Dietetics and Food, School of Clinical Sciences, Monash University, Clayton, Victoria, Australia
| | - Daniel Moses
- Graduate School of Biomedical Engineering, University of New South Wales, Randwick, New South Wales, Australia.,Department of Radiology, Prince of Wales Hospital and Community Health Services, Randwick, New South Wales, Australia
| | - Robert Smee
- Department of Radiation Oncology, Nelune Comprehensive Cancer Centre, Prince of Wales Hospital and Community Health Services, Randwick, New South Wales, Australia.,Prince of Wales Clinical School, Faculty of Medicine, University of New South Wales, Randwick, New South Wales, Australia.,Department of Radiation Oncology, Tamworth Base Hospital, Tamworth, New South Wales, Australia
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Impact of early postoperative factors on changes in skeletal muscle mass after esophagectomy in older patients with esophageal cancer. Eur Geriatr Med 2023; 14:203-210. [PMID: 36586085 PMCID: PMC9902305 DOI: 10.1007/s41999-022-00735-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 12/19/2022] [Indexed: 01/01/2023]
Abstract
BACKGROUND Loss of skeletal muscle mass, measured by the skeletal muscle mass index (SMI), after esophagectomy negatively impacts prognosis. However, the information to develop novel supportive care options for preventing loss of skeletal muscle mass is limited. The purpose of this retrospective cohort study was to investigate the impact of early postoperative factors on change in SMI 4 months after curative esophagectomy in older patients with esophageal cancer. METHODS This study included 113 subjects who underwent esophagectomy between 2015 and 2020. Preoperative and postoperative SMI (cm2/m2) were calculated from computed tomography images. The percentage change in SMI 4 months after surgery (SMI%) was calculated as follows: ([postoperative SMI - preoperative SMI] ÷ preoperative SMI) × 100. Potential factors affecting percentage change of SMI after surgery were analyzed by multiple regression. RESULTS The mean SMI% was - 5.6%. The percentage change (per 1%) in quadriceps muscle strength in the first month after surgery (standardized β = 0.190, p = 0.048) impacted the SMI%, which was independent of age, sex, preoperative SMI, comorbidity, pathological stage, and neoadjuvant chemotherapy. CONCLUSION Quadriceps muscle weakness in the first month after esophagectomy impacted the SMI% in a dose-dependent relationship.
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Zhang Y, Zhang T, Yin W, Zhang L, Xiang J. Diagnostic Value of Sarcopenia Computed Tomography Metrics for Older Patients with or without Cancers with Gastrointestinal Disorders. J Am Med Dir Assoc 2023; 24:220-227.e4. [PMID: 36463968 DOI: 10.1016/j.jamda.2022.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 10/11/2022] [Accepted: 10/28/2022] [Indexed: 12/04/2022]
Abstract
OBJECTIVES The diagnostic utility of poor body composition measures in sarcopenia remains unclear. We hypothesize that the skeletal muscle gauge [combination of skeletal muscle index (SMI) and skeletal muscle density (SMD); SMG = SMI × SMD] would have significant diagnostic and predictive value in certain muscle regions and populations. DESIGN Prospective cross-sectional study. SETTING AND PARTICIPANTS We examined inpatients age ≥60 years with or without cancer and with gastrointestinal disorders. METHODS We used computed tomography (CT) image metrics in the 12th thoracic (T12), third lumbar (L3), erector spinae muscle (ESM), and psoas muscle (PM) regions to establish correlations with the 2019 Asian Working Group for Sarcopenia Consensus and used receiver operating characteristic area under the curve (AUC) to compare differences between metrics. Associations between CT metrics and mortality were reported as relative risk after adjustments. RESULTS We evaluated 385 patients (median age, 69.0 years; 60.8% men) and found consistent trends in cancer (49.6%) and noncancer (50.4%) cohorts. SMG had a stronger correlation with muscle mass than SMD [mean rho: 0.68 (range, 0.59‒0.73) vs 0.39 (range, 0.28‒0.48); all P < .01] in T12, L3, and PM regions and a stronger correlation with muscle function than SMI [mean rho: 0.60 (range, 0.50‒0.77) vs 0.36 (range, 0.22‒0.58); all P < .05] in T12, ESM, and L3 regions. SMG outperformed SMI in diagnostic accuracy in all regions, particularly for L3 (AUC: 0.87‒0.88 vs 0.80‒0.82; both P < .05). PMG (PM gauge) and L3SMG did not differ, whereas EMG (ESM gauge) or T12SMG and L3SMG did (AUC: 0.80‒0.82 vs 0.87‒0.88; all P < .05). L3SMI, L3SMD, T12SMG, EMG, and PMG showed no association with 1-year cancer-related mortality after adjusting for confounders; however, L3SMG [relative risk = 0.92 (0.85‒0.99); P = .023) was. CONCLUSIONS AND IMPLICATIONS L3SMG covers all features of sarcopenia with more diagnostic value than other metrics, allowing a complete sarcopenia assessment with CT alone and not just in populations with cancer.
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Affiliation(s)
- Yunyun Zhang
- The Second School of Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China; Department of Rehabilitation, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Ting Zhang
- Department of Rehabilitation, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China; Medical Technology School, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Wenjing Yin
- The Second School of Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China; Department of Rehabilitation, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Lei Zhang
- Department of Medical Imaging, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jie Xiang
- The Second School of Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China; Department of Rehabilitation, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China; Medical Technology School, Xuzhou Medical University, Xuzhou, Jiangsu, China.
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Sirago G, Pellegrino MA, Bottinelli R, Franchi MV, Narici MV. Loss of neuromuscular junction integrity and muscle atrophy in skeletal muscle disuse. Ageing Res Rev 2023; 83:101810. [PMID: 36471545 DOI: 10.1016/j.arr.2022.101810] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 11/25/2022] [Accepted: 11/25/2022] [Indexed: 11/27/2022]
Abstract
Physical inactivity (PI) is a major risk factor of chronic diseases. A major aspect of PI is loss of muscle mass and strength. The latter phenomenon significantly impacts daily life and represent a major issue for global health. Understandably, skeletal muscle itself has been the major focus of studies aimed at understanding the mechanisms underlying loss of mass and strength. Relatively lesser attention has been given to the contribution of alterations in somatomotor control, despite the fact that these changes can start very early and can occur at multiple levels, from the cortex down to the neuromuscular junction (NMJ). It is well known that exposure to chronic inactivity or immobilization causes a disproportionate loss of force compared to muscle mass, i.e. a loss of specific or intrinsic whole muscle force. The latter phenomenon may be partially explained by the loss of specific force of individual muscle fibres, but several other players are very likely to contribute to such detrimental phenomenon. Irrespective of the length of the disuse period, the loss of force is, in fact, more than two-fold greater than that of muscle size. It is very likely that somatomotor alterations may contribute to this loss in intrinsic muscle force. Here we review evidence that alterations of one component of somatomotor control, namely the neuromuscular junction, occur in disuse. We also discuss some of the novel players in NMJ stability (e.g., homer, bassoon, pannexin) and the importance of new established and emerging molecular markers of neurodegenerative processes in humans such as agrin, neural-cell adhesion molecule and light-chain neurofilaments.
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Affiliation(s)
- Giuseppe Sirago
- Department of Biomedical Sciences, University of Padova, Padova 35131, Italy.
| | - Maria A Pellegrino
- Department of Molecular Medicine, University of Pavia, Pavia 27100, Italy
| | - Roberto Bottinelli
- Department of Molecular Medicine, University of Pavia, Pavia 27100, Italy; IRCCS Mondino Foundation, Pavia 27100, Italy
| | - Martino V Franchi
- Department of Biomedical Sciences, University of Padova, Padova 35131, Italy
| | - Marco V Narici
- Department of Biomedical Sciences, University of Padova, Padova 35131, Italy; CIR-MYO Myology Center, University of Padova, Padova 35131, Italy.
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Hendrickse PW, Wüst RCI, Ganse B, Giakoumaki I, Rittweger J, Bosutti A, Degens H. Capillary rarefaction during bed rest is proportionally less than fibre atrophy and loss of oxidative capacity. J Cachexia Sarcopenia Muscle 2022; 13:2712-2723. [PMID: 36102002 PMCID: PMC9745458 DOI: 10.1002/jcsm.13072] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 07/19/2022] [Accepted: 07/24/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Muscle disuse from bed rest or spaceflight results in losses in muscle mass, strength and oxidative capacity. Capillary rarefaction may contribute to muscle atrophy and the reduction in oxidative capacity during bed rest. Artificial gravity may attenuate the negative effects of long-term space missions or bed rest. The aim of the present study was to assess (1) the effects of bed rest on muscle fibre size, fibre type composition, capillarization and oxidative capacity in the vastus lateralis and soleus muscles after 6 and 55 days of bed rest and (2) the effectiveness of artificial gravity in mitigating bed-rest-induced detriments to these parameters. METHODS Nineteen participants were assigned to a control group (control, n = 6) or an intervention group undergoing 30 min of centrifugation (n = 13). All underwent 55 days of head-down tilt bed rest. Vastus lateralis and soleus biopsies were taken at baseline and after 6 and 55 days of bed rest. Fibre type composition, fibre cross-sectional area, capillarization indices and oxidative capacity were determined. RESULTS After just 6 days of bed rest, fibre atrophy (-23.2 ± 12.4%, P < 0.001) and reductions in capillary-to-fibre ratio (C:F; 1.97 ± 0.57 vs. 1.56 ± 0.41, P < 0.001) were proportional in both muscles as reflected by a maintained capillary density. Fibre atrophy proceeded at a much slower rate between 6 and 55 days of bed rest (-11.6 ± 12.1% of 6 days, P = 0.032) and was accompanied by a 19.1% reduction in succinate dehydrogenase stain optical density (P < 0.001), without any further significant decrements in C:F (1.56 ± 0.41 vs. 1.49 ± 0.37, P = 0.459). Consequently, after 55 days of bed rest, the capillary supply-oxidative capacity ratio of a fibre had increased by 41.9% (P < 0.001), indicating a capillarization in relative excess of oxidative capacity. Even though the heterogeneity of capillary spacing (LogR SD) was increased after 55 days by 12.7% (P = 0.004), tissue oxygenation at maximal oxygen consumption of the fibres was improved after 55 days bed rest. Daily centrifugation failed to blunt the bed-rest-induced reductions in fibre size and oxidative capacity and capillary rarefaction. CONCLUSIONS The relationship between fibre size and oxidative capacity with the capillary supply of a fibre is uncoupled during prolonged bed rest as reflected by a rapid loss of muscle mass and capillaries, followed at later stages by a more than proportional loss of mitochondria without further capillary loss. The resulting excessive capillary supply of the muscle after prolonged bed rest is advantageous for the delivery of substrates needed for subsequent muscle recovery.
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Affiliation(s)
- Paul William Hendrickse
- Research Centre for Musculoskeletal Science & Sports Medicine, Department of Life Sciences, Manchester Metropolitan University, Manchester, UK.,School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Rob C I Wüst
- Laboratory for Myology, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Bergita Ganse
- Werner Siemens Foundation Endowed Chair for Innovative Implant Development (Fracture Healing), Saarland University, Saarbrücken, Germany
| | - Ifigeneia Giakoumaki
- Research Centre for Musculoskeletal Science & Sports Medicine, Department of Life Sciences, Manchester Metropolitan University, Manchester, UK.,Apis Assay Technologies Ltd., Manchester, UK
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.,Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
| | | | - Hans Degens
- Research Centre for Musculoskeletal Science & Sports Medicine, Department of Life Sciences, Manchester Metropolitan University, Manchester, UK.,Lithuanian Sports University, Kaunas, Lithuania
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Hardy EJO, Inns TB, Hatt J, Doleman B, Bass JJ, Atherton PJ, Lund JN, Phillips BE. The time course of disuse muscle atrophy of the lower limb in health and disease. J Cachexia Sarcopenia Muscle 2022; 13:2616-2629. [PMID: 36104842 PMCID: PMC9745468 DOI: 10.1002/jcsm.13067] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 07/01/2022] [Accepted: 07/20/2022] [Indexed: 12/15/2022] Open
Abstract
Short, intermittent episodes of disuse muscle atrophy (DMA) may have negative impact on age related muscle loss. There is evidence of variability in rate of DMA between muscles and over the duration of immobilization. As yet, this is poorly characterized. This review aims to establish and compare the time-course of DMA in immobilized human lower limb muscles in both healthy and critically ill individuals, exploring evidence for an acute phase of DMA and differential rates of atrophy between and muscle groups. MEDLINE, Embase, CINHAL and CENTRAL databases were searched from inception to April 2021 for any study of human lower limb immobilization reporting muscle volume, cross-sectional area (CSA), architecture or lean leg mass over multiple post-immobilization timepoints. Risk of bias was assessed using ROBINS-I. Where possible meta-analysis was performed using a DerSimonian and Laird random effects model with effect sizes reported as mean differences (MD) with 95% confidence intervals (95% CI) at various time-points and a narrative review when meta-analysis was not possible. Twenty-nine studies were included, 12 in healthy volunteers (total n = 140), 18 in patients on an Intensive Therapy Unit (ITU) (total n = 516) and 3 in patients with ankle fracture (total n = 39). The majority of included studies are at moderate risk of bias. Rate of quadriceps atrophy over the first 14 days was significantly greater in the ITU patients (MD -1.01 95% CI -1.32, -0.69), than healthy cohorts (MD -0.12 95% CI -0.49, 0.24) (P < 0.001). Rates of atrophy appeared to vary between muscle groups (greatest in triceps surae (-11.2% day 28), followed by quadriceps (-9.2% day 28), then hamstrings (-6.5% day 28), then foot dorsiflexors (-3.2% day 28)). Rates of atrophy appear to decrease over time in healthy quadriceps (-6.5% day 14 vs. -9.1% day 28) and triceps surae (-7.8% day 14 vs. -11.2% day 28), and ITU quadriceps (-13.2% day 7 vs. -28.2% day 14). There appears to be variability in the rate of DMA between muscle groups, and more rapid atrophy during the earliest period of immobilization, indicating different mechanisms being dominant at different timepoints. Rates of atrophy are greater amongst critically unwell patients. Overall evidence is limited, and existing data has wide variability in the measures reported. Further work is required to fully characterize the time course of DMA in both health and disease.
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Affiliation(s)
- Edward J O Hardy
- Department of General Surgery, Royal Derby Hospital, Derby, UK.,Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
| | - Thomas B Inns
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK.,MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research (CMAR) and NIHR Nottingham Biomedical Research Centre, Nottingham, UK
| | - Jacob Hatt
- Department of General Surgery, Royal Derby Hospital, Derby, UK.,Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
| | - Brett Doleman
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK.,Department of Anaesthetics, Royal Derby Hospital, Derby, UK
| | - Joseph J Bass
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK.,MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research (CMAR) and NIHR Nottingham Biomedical Research Centre, Nottingham, UK
| | - Philip J Atherton
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK.,MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research (CMAR) and NIHR Nottingham Biomedical Research Centre, Nottingham, UK
| | - Jonathan N Lund
- Department of General Surgery, Royal Derby Hospital, Derby, UK.,Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
| | - Bethan E Phillips
- Centre Of Metabolism, Ageing and Physiology (COMAP), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK.,MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research (CMAR) and NIHR Nottingham Biomedical Research Centre, Nottingham, UK
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39
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Soendenbroe C. Neuromuscular function in experimental disuse - a prime suspect? J Physiol 2022; 600:4539-4540. [PMID: 36161657 PMCID: PMC9828185 DOI: 10.1113/jp283800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Accepted: 09/20/2022] [Indexed: 01/12/2023] Open
Affiliation(s)
- Casper Soendenbroe
- Department of Orthopaedic SurgeryInstitute of Sports Medicine CopenhagenCopenhagen University Hospital Bispebjerg and FrederiksbergCopenhagenDenmark
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40
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Hedge ET, Patterson CA, Mastrandrea CJ, Sonjak V, Hajj-Boutros G, Faust A, Morais JA, Hughson RL. Implementation of exercise countermeasures during spaceflight and microgravity analogue studies: Developing countermeasure protocols for bedrest in older adults (BROA). Front Physiol 2022; 13:928313. [PMID: 36017336 PMCID: PMC9395735 DOI: 10.3389/fphys.2022.928313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 06/27/2022] [Indexed: 12/18/2022] Open
Abstract
Significant progress has been made in the development of countermeasures to attenuate the negative consequences of prolonged exposure to microgravity on astronauts’ bodies. Deconditioning of several organ systems during flight includes losses to cardiorespiratory fitness, muscle mass, bone density and strength. Similar deconditioning also occurs during prolonged bedrest; any protracted time immobile or inactive, especially for unwell older adults (e.g., confined to hospital beds), can lead to similar detrimental health consequences. Due to limitations in physiological research in space, the six-degree head-down tilt bedrest protocol was developed as ground-based analogue to spaceflight. A variety of exercise countermeasures have been tested as interventions to limit detrimental changes and physiological deconditioning of the musculoskeletal and cardiovascular systems. The Canadian Institutes of Health Research and the Canadian Space Agency recently provided funding for research focused on Understanding the Health Impact of Inactivity to study the efficacy of exercise countermeasures in a 14-day randomized clinical trial of six-degree head-down tilt bedrest study in older adults aged 55–65 years old (BROA). Here we will describe the development of a multi-modality countermeasure protocol for the BROA campaign that includes upper- and lower-body resistance exercise and head-down tilt cycle ergometry (high-intensity interval and continuous aerobic exercise training). We provide reasoning for the choice of these modalities following review of the latest available information on exercise as a countermeasure for inactivity and spaceflight-related deconditioning. In summary, this paper sets out to review up-to-date exercise countermeasure research from spaceflight and head-down bedrest studies, whilst providing support for the proposed research countermeasure protocols developed for the bedrest study in older adults.
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Affiliation(s)
- Eric T. Hedge
- Schlegel-University of Waterloo Research Institute for Aging, Waterloo, ON, Canada
- Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, ON, Canada
| | | | | | - Vita Sonjak
- Research Institute of McGill University Health Centre, McGill University, Montréal, QC, Canada
| | - Guy Hajj-Boutros
- Research Institute of McGill University Health Centre, McGill University, Montréal, QC, Canada
| | - Andréa Faust
- Research Institute of McGill University Health Centre, McGill University, Montréal, QC, Canada
| | - José A. Morais
- Research Institute of McGill University Health Centre, McGill University, Montréal, QC, Canada
- Division of Geriatric Medicine, McGill University Health Centre, McGill University, Montréal, QC, Canada
| | - Richard L. Hughson
- Schlegel-University of Waterloo Research Institute for Aging, Waterloo, ON, Canada
- *Correspondence: Richard L. Hughson,
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41
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Swain P, Mortreux M, Laws JM, Kyriacou H, De Martino E, Winnard A, Caplan N. Skeletal muscle deconditioning during partial weight-bearing in rodents - A systematic review and meta-analysis. LIFE SCIENCES IN SPACE RESEARCH 2022; 34:68-86. [PMID: 35940691 DOI: 10.1016/j.lssr.2022.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/16/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
Space agencies are planning to send humans back to the Lunar surface, in preparation for crewed exploration of Mars. However, the effect of hypogravity on human skeletal muscle is largely unknown. A recently established rodent partial weight-bearing model has been employed to mimic various levels of hypogravity loading and may provide valuable insights to better understanding how human muscle might respond to this environment. The aim of this study was to perform a systematic review regarding the effects of partial weight-bearing on the morphology and function of rodent skeletal muscle. Five online databases were searched with the following inclusion criteria: population (rodents), intervention (partial weight-bearing for ≥1 week), control (full weight-bearing), outcome(s) (skeletal muscle morphology/function), and study design (animal intervention). Of the 2,993 studies identified, eight were included. Partial weight-bearing at 20%, 40%, and 70% of full loading caused rapid deconditioning of skeletal muscle morphology and function within the first one to two weeks of exposure. Calf circumference, hindlimb wet muscle mass, myofiber cross-sectional area, front/rear paw grip force, and nerve-stimulated plantarflexion force were reduced typically by medium to very large effects. Higher levels of partial weight-bearing often attenuated deconditioning but failed to entirely prevent it. Species and sex mediated the deconditioning response. Risk of bias was low/unclear for most studies. These findings suggest that there is insufficient stimulus to mitigate muscular deconditioning in hypogravity settings highlighting the need to develop countermeasures for maintaining astronaut/cosmonaut muscular health on the Moon and Mars.
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Affiliation(s)
- Patrick Swain
- Aerospace Medicine and Rehabilitation Laboratory, Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, United Kingdom.
| | - Marie Mortreux
- Harvard Medical School, Department of Neurology, Beth Israel Deaconess Medical Center Boston, Massachusetts, United States
| | - Jonathan M Laws
- Aerospace Medicine and Rehabilitation Laboratory, Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Harry Kyriacou
- School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Enrico De Martino
- Aerospace Medicine and Rehabilitation Laboratory, Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Andrew Winnard
- Aerospace Medicine and Rehabilitation Laboratory, Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Nick Caplan
- Aerospace Medicine and Rehabilitation Laboratory, Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, United Kingdom
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42
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Karim A, Iqbal MS, Muhammad T, Ahmad F, Qaisar R. Elevated plasma zonulin and CAF22 are correlated with sarcopenia and functional dependency at various stages of Alzheimer’s diseases. Neurosci Res 2022; 184:47-53. [DOI: 10.1016/j.neures.2022.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 08/01/2022] [Accepted: 08/04/2022] [Indexed: 10/31/2022]
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43
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Joint Cartilage in Long-Duration Spaceflight. Biomedicines 2022; 10:biomedicines10061356. [PMID: 35740378 PMCID: PMC9220015 DOI: 10.3390/biomedicines10061356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/05/2022] [Accepted: 06/06/2022] [Indexed: 12/14/2022] Open
Abstract
This review summarizes the current literature available on joint cartilage alterations in long-duration spaceflight. Evidence from spaceflight participants is currently limited to serum biomarker data in only a few astronauts. Findings from analogue model research, such as bed rest studies, as well as data from animal and cell research in real microgravity indicate that unloading and radiation exposure are associated with joint degeneration in terms of cartilage thinning and changes in cartilage composition. It is currently unknown how much the individual cartilage regions in the different joints of the human body will be affected on long-term missions beyond the Low Earth Orbit. Given the fact that, apart from total joint replacement or joint resurfacing, currently no treatment exists for late-stage osteoarthritis, countermeasures might be needed to avoid cartilage damage during long-duration missions. To plan countermeasures, it is important to know if and how joint cartilage and the adjacent structures, such as the subchondral bone, are affected by long-term unloading, reloading, and radiation. The use of countermeasures that put either load and shear, or other stimuli on the joints, shields them from radiation or helps by supporting cartilage physiology, or by removing oxidative stress possibly help to avoid OA in later life following long-duration space missions. There is a high demand for research on the efficacy of such countermeasures to judge their suitability for their implementation in long-duration missions.
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44
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Arribas L, Sabaté-Llobera A, Domingo MC, Taberna M, Sospedra M, Martin L, González-Tampán AR, Pallarés N, Mesía R, Baracos VE. Assessing dynamic change in muscle during treatment of patients with cancer: precision testing standards. Clin Nutr 2022; 41:1059-1065. [DOI: 10.1016/j.clnu.2022.03.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 03/02/2022] [Accepted: 03/05/2022] [Indexed: 11/24/2022]
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45
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Trinity JD, Drummond MJ, Fermoyle CC, McKenzie AI, Supiano MA, Richardson RS. Cardiovasomobility: an integrative understanding of how disuse impacts cardiovascular and skeletal muscle health. J Appl Physiol (1985) 2022; 132:835-861. [PMID: 35112929 PMCID: PMC8934676 DOI: 10.1152/japplphysiol.00607.2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cardiovasomobility is a novel concept that encompasses the integration of cardiovascular and skeletal muscle function in health and disease with critical modification by physical activity, or lack thereof. Compelling evidence indicates that physical activity improves health while a sedentary, or inactive, lifestyle accelerates cardiovascular and skeletal muscle dysfunction and hastens disease progression. Identifying causative factors for vascular and skeletal muscle dysfunction, especially in humans, has proven difficult due to the limitations associated with cross-sectional investigations. Therefore, experimental models of physical inactivity and disuse, which mimic hospitalization, injury, and illness, provide important insight into the mechanisms and consequences of vascular and skeletal muscle dysfunction. This review provides an overview of the experimental models of disuse and inactivity and focuses on the integrated responses of the vasculature and skeletal muscle in response to disuse/inactivity. The time course and magnitude of dysfunction evoked by various models of disuse/inactivity are discussed in detail, and evidence in support of the critical roles of mitochondrial function and oxidative stress are presented. Lastly, strategies aimed at preserving vascular and skeletal muscle dysfunction during disuse/inactivity are reviewed. Within the context of cardiovasomobility, experimental manipulation of physical activity provides valuable insight into the mechanisms responsible for vascular and skeletal muscle dysfunction that limit mobility, degrade quality of life, and hasten the onset of disease.
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Affiliation(s)
- Joel D Trinity
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
| | - Micah J Drummond
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah.,Department of Physical Therapy, University of Utah, Salt Lake City, Utah
| | - Caitlin C Fermoyle
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Alec I McKenzie
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Mark A Supiano
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Russell S Richardson
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
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46
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Soares MN, Eggelbusch M, Naddaf E, Gerrits KHL, van der Schaaf M, van den Borst B, Wiersinga WJ, van Vugt M, Weijs PJM, Murray AJ, Wüst RCI. Skeletal muscle alterations in patients with acute Covid-19 and post-acute sequelae of Covid-19. J Cachexia Sarcopenia Muscle 2022; 13:11-22. [PMID: 34997689 PMCID: PMC8818659 DOI: 10.1002/jcsm.12896] [Citation(s) in RCA: 111] [Impact Index Per Article: 55.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 11/11/2021] [Accepted: 11/22/2021] [Indexed: 12/14/2022] Open
Abstract
Skeletal muscle-related symptoms are common in both acute coronavirus disease (Covid)-19 and post-acute sequelae of Covid-19 (PASC). In this narrative review, we discuss cellular and molecular pathways that are affected and consider these in regard to skeletal muscle involvement in other conditions, such as acute respiratory distress syndrome, critical illness myopathy, and post-viral fatigue syndrome. Patients with severe Covid-19 and PASC suffer from skeletal muscle weakness and exercise intolerance. Histological sections present muscle fibre atrophy, metabolic alterations, and immune cell infiltration. Contributing factors to weakness and fatigue in patients with severe Covid-19 include systemic inflammation, disuse, hypoxaemia, and malnutrition. These factors also contribute to post-intensive care unit (ICU) syndrome and ICU-acquired weakness and likely explain a substantial part of Covid-19-acquired weakness. The skeletal muscle weakness and exercise intolerance associated with PASC are more obscure. Direct severe acute respiratory syndrome coronavirus (SARS-CoV)-2 viral infiltration into skeletal muscle or an aberrant immune system likely contribute. Similarities between skeletal muscle alterations in PASC and chronic fatigue syndrome deserve further study. Both SARS-CoV-2-specific factors and generic consequences of acute disease likely underlie the observed skeletal muscle alterations in both acute Covid-19 and PASC.
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Affiliation(s)
- Madu N Soares
- Laboratory for Myology, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Moritz Eggelbusch
- Laboratory for Myology, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Department of Nutrition and Dietetics, Amsterdam UMC, Location VUmc, Amsterdam Movement Sciences, Amsterdam, The Netherlands.,Faculty of Sports and Nutrition, Center of Expertise Urban Vitality, Amsterdam University of Applied Sciences, Amsterdam, The Netherlands
| | - Elie Naddaf
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Karin H L Gerrits
- Laboratory for Myology, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Merem Medical Rehabilitation, Hilversum, The Netherlands
| | - Marike van der Schaaf
- Department of Rehabilitation, Amsterdam UMC, University of Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands.,Faculty of Health, Center of Expertise Urban Vitality, Amsterdam University of Applied Sciences, Amsterdam, The Netherlands
| | - Bram van den Borst
- Department of Pulmonary Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - W Joost Wiersinga
- Center for Experimental and Molecular Medicine (CEMM), Amsterdam University Medical Centers - Location AMC, University of Amsterdam, Amsterdam, The Netherlands.,Department of Internal Medicine, Division of Infectious Diseases, Amsterdam University Medical Centers - Location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Michele van Vugt
- Department of Internal Medicine, Division of Infectious Diseases, Amsterdam University Medical Centers - Location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Peter J M Weijs
- Department of Nutrition and Dietetics, Amsterdam UMC, Location VUmc, Amsterdam Movement Sciences, Amsterdam, The Netherlands.,Faculty of Sports and Nutrition, Center of Expertise Urban Vitality, Amsterdam University of Applied Sciences, Amsterdam, The Netherlands
| | - Andrew J Murray
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - Rob C I Wüst
- Laboratory for Myology, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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47
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Divjak M, Sedej G, Murks N, Gerževič M, Marusic U, Pišot R, Šimunič B, Holobar A. Inter-Person Differences in Isometric Coactivations of Triceps Surae and Tibialis Anterior Decrease in Young, but Not in Older Adults After 14 Days of Bed Rest. Front Physiol 2022; 12:809243. [PMID: 35153817 PMCID: PMC8832055 DOI: 10.3389/fphys.2021.809243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 12/24/2021] [Indexed: 11/13/2022] Open
Abstract
We examined activation patterns of the gastrocnemius medialis (GM), gastrocnemius lateralis (GL), soleus (SO), and tibialis anterior (TA) muscles in eight older (58.4 ± 3.3 years) and seven young (23.1 ± 2.9 years) participants, before and after 14 days of horizontal bed rest. Visual feedback on the exerted muscle torque was provided to the participants. The discharge patterns of individual motor units (MUs) were studied in three repetitions of isometric plantar flexion at 30 and 60% of Maximum Voluntary Contraction (MVC), before, and 1 day after the 14-day bed rest, respectively. In the GL and GM muscles, the older participants demonstrated higher MU discharge rates than the young, regardless of the contraction level, both before and after the bed rest. In the TA and SO muscles, the differences between the older and young participants were less consistent. Detailed analysis revealed person-specific changes in the MU discharge rates after the bed rest. To quantify the coactivation patterns we calculated the correlation coefficients between the cumulative spike trains of identified MUs from each muscle, and measured the root mean square difference of the correlation coefficients between the trials of the same session (intra-session variability) and between different sessions (inter-session variability) in each participant (intra-person comparison) and across participants (inter-person comparison). In the intra-person comparison, the inter-session variability was higher than the intra-session variability, either before or after the bed rest. At 60% MVC torque, the young demonstrated higher inter-person variability of coactivation than the older participants, but this variability decreased significantly after the bed rest. In older participants, inter-person variability was consistently lower at 60% than at 30% MVC torque. In young participants, inter-person variability became lower at 60% than at 30% MVC torque only after the bed rest. Precaution is required when analyzing the MU discharge and coactivation patterns, as individual persons demonstrate individual adaptations to aging or bed rest.
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Affiliation(s)
- Matjaž Divjak
- System Software Laboratory, Institute of Computer Science, Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia
| | - Gašper Sedej
- System Software Laboratory, Institute of Computer Science, Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia
| | - Nina Murks
- System Software Laboratory, Institute of Computer Science, Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia
| | - Mitja Gerževič
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
- Department of Health Sciences, Alma Mater Europaea – ECM, Maribor, Slovenia
| | - Uros Marusic
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
- Department of Health Sciences, Alma Mater Europaea – ECM, Maribor, Slovenia
| | - Rado Pišot
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
| | - Boštjan Šimunič
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
| | - Aleš Holobar
- System Software Laboratory, Institute of Computer Science, Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia
- *Correspondence: Aleš Holobar,
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48
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Bolsterlee B. A new framework for analysis of three-dimensional shape and architecture of human skeletal muscles from in vivo imaging data. J Appl Physiol (1985) 2022; 132:712-725. [PMID: 35050794 DOI: 10.1152/japplphysiol.00638.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A new framework is presented for comprehensive analysis of the three-dimensional shape and architecture of human skeletal muscles from magnetic resonance and diffusion tensor imaging data. The framework comprises three key features: (1) identification of points on the surface of and inside a muscle that have a correspondence to points on and inside another muscle, (2) reconstruction of average muscle shape and average muscle fibre orientations, and (3) utilization of data on between-muscle variation to visualize and make statistical inferences about changes or differences in muscle shape and architecture. The general use of the framework is demonstrated by its application to three case studies. Analysis of data obtained before and after eight weeks of strength training revealed there was little regional variation in hypertrophy of the vastus medialis and vastus lateralis, and no systematic change in pennation angle. Analysis of passive muscle lengthening revealed heterogeneous changes in shape of the medial gastrocnemius, and confirmed the ability of the methods to detect subtle changes in muscle fibre orientation. Analysis of the medial gastrocnemius of children with unilateral cerebral palsy showed that muscles in the more-affected limb were shorter, thinner and less wide than muscles in the less-affected limb, and had slightly more pennate muscle fibres in the central and proximal part of the muscle. Amongst other applications, the framework can be used to explore the mechanics of muscle contraction, investigate adaptations of muscle architecture, build anatomically realistic computational models of skeletal muscles, and compare muscle shape and architecture between species.
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Affiliation(s)
- Bart Bolsterlee
- Neuroscience Research Australia (NeuRA), Randwick, Sydney, New South Wales, Australia.,University of New South Wales, Randwick, New South Wales, Australia.,Queensland University of Technology, Brisbane, Queensland, Australia
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49
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Physical inactivity – The human health’s greatest enemy. Zdr Varst 2021; 61:1-5. [PMID: 35111260 PMCID: PMC8776290 DOI: 10.2478/sjph-2022-0002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 12/02/2021] [Indexed: 12/03/2022] Open
Abstract
For decades, research has been highlighting the positive impact of physical activity on health. Despite the immense efforts made by many professional and scientific organizations to raise individual and societal awareness about the role of a sufficient quantity and intensity of physical activity in everyday life and to increase the level of adherence, the situation is still very worrying. Even more worrying is the fact that increasingly prolonged periods of physical inactivity are insidiously and aggressively taking over modern people’s lives – at school, at work, at home, even at leisure. It is probably incomprehensible and difficult for many to accept, but physical inactivity is becoming the first and worst enemy of health in today’s society.
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50
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Mortreux M, Rosa‐Caldwell ME, Stiehl ID, Sung D, Thomas NT, Fry CS, Rutkove SB. Hindlimb suspension in Wistar rats: Sex-based differences in muscle response. Physiol Rep 2021; 9:e15042. [PMID: 34612585 PMCID: PMC8493566 DOI: 10.14814/phy2.15042] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 08/27/2021] [Accepted: 08/27/2021] [Indexed: 12/16/2022] Open
Abstract
Ground-based animal models have been used extensively to understand the effects of microgravity on various physiological systems. Among them, hindlimb suspension (HLS), developed in 1979 in rats, remains the gold-standard and allows researchers to study the consequences of total unloading of the hind limbs while inducing a cephalic fluid shift. While this model has already brought valuable insights to space biology, few studies have directly compared functional decrements in the muscles of males and females during HLS. We exposed 28 adult Wistar rats (14 males and 14 females) to 14 days of HLS or normal loading (NL) to better assess how sex impacts disuse-induced muscle deconditioning. Females better maintained muscle function during HLS than males, as shown by a more moderate reduction in grip strength at 7 days (males: -37.5 ± 3.1%, females: -22.4 ± 6.5%, compared to baseline), that remains stable during the second week of unloading (males: -53.3 ± 5.7%, females: -22.4 ± 5.5%, compared to day 0) while the males exhibit a steady decrease over time (effect of sex × loading p = 0.0002, effect of sex × time × loading p = 0.0099). This was further supported by analyzing the force production in response to a tetanic stimulus. Further functional analyses using force production were also shown to correspond to sex differences in relative loss of muscle mass and CSA. Moreover, our functional data were supported by histomorphometric analyzes, and we highlighted differences in relative muscle loss and CSA. Specifically, female rats seem to experience a lesser muscle deconditioning during disuse than males thus emphasizing the need for more studies that will assess male and female animals concomitantly to develop tailored, effective countermeasures for all astronauts.
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Affiliation(s)
- Marie Mortreux
- Department of NeurologyHarvard Medical School – Beth Israel Deaconess Medical CenterBostonMassachusettsUSA
| | - Megan E. Rosa‐Caldwell
- Department of NeurologyHarvard Medical School – Beth Israel Deaconess Medical CenterBostonMassachusettsUSA
| | - Ian D. Stiehl
- Department of NeurologyHarvard Medical School – Beth Israel Deaconess Medical CenterBostonMassachusettsUSA
- Department of Physics and AstronomyDartmouth CollegeHanoverNew HampshireUSA
| | - Dong‐Min Sung
- Department of NeurologyHarvard Medical School – Beth Israel Deaconess Medical CenterBostonMassachusettsUSA
| | - Nicholas T. Thomas
- Department of Athletic Training and Clinical NutritionUniversity of KentuckyLexingtonKentuckyUSA
| | - Christopher S. Fry
- Department of Athletic Training and Clinical NutritionUniversity of KentuckyLexingtonKentuckyUSA
| | - Seward B. Rutkove
- Department of NeurologyHarvard Medical School – Beth Israel Deaconess Medical CenterBostonMassachusettsUSA
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