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Warneke K, Behm DG, Alizadeh S, Hillebrecht M, Konrad A, Wirth K. Discussing Conflicting Explanatory Approaches in Flexibility Training Under Consideration of Physiology: A Narrative Review. Sports Med 2024; 54:1785-1799. [PMID: 38819597 PMCID: PMC11258068 DOI: 10.1007/s40279-024-02043-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2024] [Indexed: 06/01/2024]
Abstract
The mechanisms underlying range of motion enhancements via flexibility training discussed in the literature show high heterogeneity in research methodology and study findings. In addition, scientific conclusions are mostly based on functional observations while studies considering the underlying physiology are less common. However, understanding the underlying mechanisms that contribute to an improved range of motion through stretching is crucial for conducting comparable studies with sound designs, optimising training routines and accurately interpreting resulting outcomes. While there seems to be no evidence to attribute acute range of motion increases as well as changes in muscle and tendon stiffness and pain perception specifically to stretching or foam rolling, the role of general warm-up effects is discussed in this paper. Additionally, the role of mechanical tension applied to greater muscle lengths for range of motion improvement will be discussed. Thus, it is suggested that physical training stressors can be seen as external stimuli that control gene expression via the targeted stimulation of transcription factors, leading to structural adaptations due to enhanced protein synthesis. Hence, the possible role of serial sarcomerogenesis in altering pain perception, reducing muscle stiffness and passive torque, or changes in the optimal joint angle for force development is considered as well as alternative interventions with a potential impact on anabolic pathways. As there are limited possibilities to directly measure serial sarcomere number, longitudinal muscle hypertrophy remains without direct evidence. The available literature does not demonstrate the necessity of only using specific flexibility training routines such as stretching to enhance acute or chronic range of motion.
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Affiliation(s)
- Konstantin Warneke
- Institute of Human Movement Science, Sport and Health, University of Graz, Graz, Austria.
- Department of Movement Sciences, Institute of Sport Science, University of Klagenfurt, Universitatsstraße 65, 9020, Klagenfurt Am Wörthersee, Austria.
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada.
| | - David G Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Shahab Alizadeh
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada
- Human Performance Lab, Department of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - Martin Hillebrecht
- University Sports Center, Carl Von Ossietzky University Oldenburg, Oldenburg, Germany
| | - Andreas Konrad
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada
- University Sports Center, Carl Von Ossietzky University Oldenburg, Oldenburg, Germany
| | - Klaus Wirth
- University of Applied Sciences Wiener Neustadt, Vienna, Austria
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2
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Rahimibarghani S, Aghaghazvini L, Shirzad N, Fateh HR. Botulinum toxin therapy for isolated first dorsal interosseous muscle pain and hypertrophy: A case report. Clin Case Rep 2024; 12:e9094. [PMID: 38915929 PMCID: PMC11194289 DOI: 10.1002/ccr3.9094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 05/17/2024] [Accepted: 06/01/2024] [Indexed: 06/26/2024] Open
Abstract
Botulinum toxin (BTX) injection can be an effective treatment for persistent pain and functional impairment associated with hypertrophy of the first dorsal interosseous muscle. It offers a non-surgical and minimally invasive alternative for those who have failed conservative treatment, showcasing the therapeutic promise of BTX for addressing similar musculoskeletal conditions.
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Affiliation(s)
- Sarvenaz Rahimibarghani
- Physical Medicine and Rehabilitation DepartmentShariati Hospital, Tehran University of Medical SciencesTehranIran
| | - Leila Aghaghazvini
- Department of RadiologyShariati Hospital, Tehran University of Medical SciencesTehranIran
| | - Niloofar Shirzad
- Physical Medicine and Rehabilitation DepartmentShariati Hospital, Tehran University of Medical SciencesTehranIran
| | - Hamid R. Fateh
- Physical Medicine and Rehabilitation DepartmentShariati Hospital, Tehran University of Medical SciencesTehranIran
- Neuromuscular Research CenterTehran University of Medical SciencesTehranIran
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3
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Wohlann T, Warneke K, Kalder V, Behm DG, Schmidt T, Schiemann S. Influence of 8-weeks of supervised static stretching or resistance training of pectoral major muscles on maximal strength, muscle thickness and range of motion. Eur J Appl Physiol 2024; 124:1885-1893. [PMID: 38240811 PMCID: PMC11129965 DOI: 10.1007/s00421-023-05413-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 12/29/2023] [Indexed: 05/28/2024]
Abstract
OBJECTIVES Current research suggests static stretch-induced maximal strength increases and muscle hypertrophy with potential to substitute resistance-training routines. However, most studies investigated the plantar flexors. This study explored the effects of a static stretching program on maximal strength, hypertrophy and flexibility of the pectoralis major and compared the effects with those of traditional resistance training. METHODS Eighty-one (81) active participants were allocated to either a static stretching, strength-training or control group. Pectoralis stretching was applied 15 min/day, 4 days per week for 8 weeks, while resistance training trained 3 days per week, 5 × 12 repetitions. RESULTS There was an increase in all parameters (strength: p < 0.001, ƞ2 = 0.313, muscle thickness: p < 0.001, ƞ2 = 0.157-0.264, flexibility: p < 0.001, ƞ2 = 0.316) and a time*group interaction (strength: p = 0.001, ƞ2 = 0.154, muscle thickness: p = 0.008-0.001, ƞ2 = 0.117-0.173, flexibility: p < 0.001, ƞ2 = 0.267). Post-hoc testing showed no difference between both intervention groups regarding maximal strength and muscle thickness (p = 0.905-0.983, d = 0.036-0.087), while flexibility increased in the stretching group (p = 0.001, d = 0.789). CONCLUSION Stretching showed increases in maximal strength and hypertrophy, which were comparable with commonly used resistance training. Based on current literature, the influence of mechanical tension as the underlying mechanism is discussed. Furthermore, as equipment and comparatively long stretching durations are requested to induce meaningful strength increases in recreationally active participants, practical application seems limited to special circumstances.
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Affiliation(s)
- Tim Wohlann
- Institute for Exercise, Sport and Health, Leuphana University, Lüneburg, Germany.
- Institute of Sport Science, University of Oldenburg, Oldenburg, Germany.
| | - Konstantin Warneke
- Institute of Sport Science, Alpen-Adria-University Klagenfurt, Klagenfurt Am Wörthersee, Austria
| | - Vincent Kalder
- Institute of Sport Science, University of Oldenburg, Oldenburg, Germany
| | - David G Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Tobias Schmidt
- Department of Sport Science, Medical School Hamburg, Hamburg, Germany
| | - Stephan Schiemann
- Institute for Exercise, Sport and Health, Leuphana University, Lüneburg, Germany
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4
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Millward DJ. Post-natal muscle growth and protein turnover: a narrative review of current understanding. Nutr Res Rev 2024; 37:141-168. [PMID: 37395180 DOI: 10.1017/s0954422423000124] [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] [Indexed: 07/04/2023]
Abstract
A model explaining the dietary-protein-driven post-natal skeletal muscle growth and protein turnover in the rat is updated, and the mechanisms involved are described, in this narrative review. Dietary protein controls both bone length and muscle growth, which are interrelated through mechanotransduction mechanisms with muscle growth induced both from stretching subsequent to bone length growth and from internal work against gravity. This induces satellite cell activation, myogenesis and remodelling of the extracellular matrix, establishing a growth capacity for myofibre length and cross-sectional area. Protein deposition within this capacity is enabled by adequate dietary protein and other key nutrients. After briefly reviewing the experimental animal origins of the growth model, key concepts and processes important for growth are reviewed. These include the growth in number and size of the myonuclear domain, satellite cell activity during post-natal development and the autocrine/paracrine action of IGF-1. Regulatory and signalling pathways reviewed include developmental mechanotransduction, signalling through the insulin/IGF-1-PI3K-Akt and the Ras-MAPK pathways in the myofibre and during mechanotransduction of satellite cells. Likely pathways activated by maximal-intensity muscle contractions are highlighted and the regulation of the capacity for protein synthesis in terms of ribosome assembly and the translational regulation of 5-TOPmRNA classes by mTORC1 and LARP1 are discussed. Evidence for and potential mechanisms by which volume limitation of muscle growth can occur which would limit protein deposition within the myofibre are reviewed. An understanding of how muscle growth is achieved allows better nutritional management of its growth in health and disease.
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Affiliation(s)
- D Joe Millward
- Department of Nutritional Sciences, School of Biosciences & Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
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5
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Nguyen J, Gilbert PM. Decoding the forces that shape muscle stem cell function. Curr Top Dev Biol 2024; 158:279-306. [PMID: 38670710 DOI: 10.1016/bs.ctdb.2024.02.009] [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] [Indexed: 04/28/2024]
Abstract
Skeletal muscle is a force-producing organ composed of muscle tissues, connective tissues, blood vessels, and nerves, all working in synergy to enable movement and provide support to the body. While robust biomechanical descriptions of skeletal muscle force production at the body or tissue level exist, little is known about force application on microstructures within the muscles, such as cells. Among various cell types, skeletal muscle stem cells reside in the muscle tissue environment and play a crucial role in driving the self-repair process when muscle damage occurs. Early evidence indicates that the fate and function of skeletal muscle stem cells are controlled by both biophysical and biochemical factors in their microenvironments, but much remains to accomplish in quantitatively describing the biophysical muscle stem cell microenvironment. This book chapter aims to review current knowledge on the influence of biophysical stresses and landscape properties on muscle stem cells in heath, aging, and diseases.
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Affiliation(s)
- Jo Nguyen
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada; Donnelly Centre, University of Toronto, Toronto, ON, Canada
| | - Penney M Gilbert
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada; Donnelly Centre, University of Toronto, Toronto, ON, Canada; Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada.
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Businari GB, Brigatto FA, de Camargo JBB, Soares EG, Braz TV, Batista DR, Col LO, Dias WG, Rosolem JM, Prestes J, Marchetti PH, Lopes CR. Chronic Effects of Inter-Set Static Stretching on Morphofunctional Outcomes in Recreationally Resistance-Trained Male and Female. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2024; 95:10-23. [PMID: 36638500 DOI: 10.1080/02701367.2022.2134547] [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: 03/17/2021] [Accepted: 09/11/2022] [Indexed: 06/17/2023]
Abstract
Purpose: The purpose of this study was to compare the effects of resistance training (RT) with inter-set static stretching (IS) versus traditional RT (TRT) on morphofunctional outcomes in recreationally resistance-trained male and female. Methods: Twenty-two recreationally-trained subjects were allocated to IS group (n = 12) or TRT (n = 10) and completed eight weeks of RT. The only difference between the groups was that IS group included static stretching between sets, while the TRT rested between the sets. Ultrasound images, dynamic and isometric strength tests for the elbow flexors and elbow extensors were evaluated pre- and post-intervention period. Results: Total training volume (TTV) was greater in TRT than IS (p = .031). TRT and IS caused similar increases in maximal dynamic and isometric strength. Fascicle length of the brachialis increased following TRT (p = .033); muscle thickness and the pennation angle of the distal portion of the triceps brachii increased following IS (p = .035 and p = .007, respectively). There were no significant changes in thickness and architecture for biceps brachii in either group. There were no significant differences between groups for any muscle strength and morphology outcome. Conclusion: IS negatively affects TTV but does not affect muscle strength and architecture of recreationally resistance-trained male and female.
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Whitlock JM. Muscle Progenitor Cell Fusion in the Maintenance of Skeletal Muscle. Results Probl Cell Differ 2024; 71:257-279. [PMID: 37996682 DOI: 10.1007/978-3-031-37936-9_13] [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] [Indexed: 11/25/2023]
Abstract
Skeletal muscle possesses a resident, multipotent stem cell population that is essential for its repair and maintenance throughout life. Here I highlight the role of this stem cell population in muscle repair and regeneration and review the genetic control of the process; the mechanistic steps of activation, migration, recognition, adhesion, and fusion of these cells; and discuss the novel recognition of the membrane signaling that coordinates myogenic cell-cell fusion, as well as the identification of a two-part fusogen system that facilitates it.
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Affiliation(s)
- Jarred M Whitlock
- Section on Membrane Biology, Eunice Kennedy Shrive National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
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8
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Davids CJ, Roberts LA, Bjørnsen T, Peake JM, Coombes JS, Raastad T. Where Does Blood Flow Restriction Fit in the Toolbox of Athletic Development? A Narrative Review of the Proposed Mechanisms and Potential Applications. Sports Med 2023; 53:2077-2093. [PMID: 37578669 PMCID: PMC10587223 DOI: 10.1007/s40279-023-01900-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/24/2023] [Indexed: 08/15/2023]
Abstract
Blood flow-restricted exercise is currently used as a low-intensity time-efficient approach to reap many of the benefits of typical high-intensity training. Evidence continues to lend support to the notion that even highly trained individuals, such as athletes, still benefit from this mode of training. Both resistance and endurance exercise may be combined with blood flow restriction to provide a spectrum of adaptations in skeletal muscle, spanning from myofibrillar to mitochondrial adjustments. Such diverse adaptations would benefit both muscular strength and endurance qualities concurrently, which are demanded in athletic performance, most notably in team sports. Moreover, recent work indicates that when traditional high-load resistance training is supplemented with low-load, blood flow-restricted exercise, either in the same session or as a separate training block in a periodised programme, a synergistic and complementary effect on training adaptations may occur. Transient reductions in mechanical loading of tissues afforded by low-load, blood flow-restricted exercise may also serve a purpose during de-loading, tapering or rehabilitation of musculoskeletal injury. This narrative review aims to expand on the current scientific and practical understanding of how blood flow restriction methods may be applied by coaches and practitioners to enhance current athletic development models.
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Affiliation(s)
- Charlie J Davids
- Sport, Performance, and Nutrition Research Group, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, Australia.
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD, Australia.
- Sport Performance Innovation and Knowledge Excellence (SPIKE), Queensland Academy of Sport, Brisbane, QLD, Australia.
| | - Llion A Roberts
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD, Australia
- Sport Performance Innovation and Knowledge Excellence (SPIKE), Queensland Academy of Sport, Brisbane, QLD, Australia
- School of Health Sciences and Social Work, Griffith University, Gold Coast, QLD, Australia
| | - Thomas Bjørnsen
- Department of Sport Science and Physical Education, University of Agder, Kristiansand, Norway
- Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway
| | - Jonathan M Peake
- Sport Performance Innovation and Knowledge Excellence (SPIKE), Queensland Academy of Sport, Brisbane, QLD, Australia
- School of Biomedical Science, Queensland University of Technology, Brisbane, QLD, Australia
| | - Jeff S Coombes
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Truls Raastad
- Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway
- Department of Physical Performance, Norwegian School of Sport Science, Oslo, Norway
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9
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Warneke K, Lohmann LH, Lima CD, Hollander K, Konrad A, Zech A, Nakamura M, Wirth K, Keiner M, Behm DG. Physiology of Stretch-Mediated Hypertrophy and Strength Increases: A Narrative Review. Sports Med 2023; 53:2055-2075. [PMID: 37556026 PMCID: PMC10587333 DOI: 10.1007/s40279-023-01898-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/22/2023] [Indexed: 08/10/2023]
Abstract
Increasing muscle strength and cross-sectional area is of crucial importance to improve or maintain physical function in musculoskeletal rehabilitation and sports performance. Decreases in muscular performance are experienced in phases of reduced physical activity or immobilization. These decrements highlight the need for alternative, easily accessible training regimens for a sedentary population to improve rehabilitation and injury prevention routines. Commonly, muscle hypertrophy and strength increases are associated with resistance training, typically performed in a training facility. Mechanical tension, which is usually induced with resistance machines and devices, is known to be an important factor that stimulates the underlying signaling pathways to enhance protein synthesis. Findings from animal studies suggest an alternative means to induce mechanical tension to enhance protein synthesis, and therefore muscle hypertrophy by inducing high-volume stretching. Thus, this narrative review discusses mechanical tension-induced physiological adaptations and their impact on muscle hypertrophy and strength gains. Furthermore, research addressing stretch-induced hypertrophy is critically analyzed. Derived from animal research, the stretching literature exploring the impact of static stretching on morphological and functional adaptations was reviewed and critically discussed. No studies have investigated the underlying physiological mechanisms in humans yet, and thus the underlying mechanisms remain speculative and must be discussed in the light of animal research. However, studies that reported functional and morphological increases in humans commonly used stretching durations of > 30 min per session of the plantar flexors, indicating the importance of high stretching volume, if the aim is to increase muscle mass and maximum strength. Therefore, the practical applicability seems limited to settings without access to resistance training (e.g., in an immobilized state at the start of rehabilitation), as resistance training seems to be more time efficient. Nevertheless, further research is needed to generate evidence in different human populations (athletes, sedentary individuals, and rehabilitation patients) and to quantify stretching intensity.
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Affiliation(s)
- Konstantin Warneke
- Institute for Exercise, Sport and Health, Leuphana University, Universitätsallee 1, 21335, Lüneburg, Deutschland, Germany.
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada.
- Institute of Sport Science, Alpen-Adria University Klagenfurt, Klagenfurt, Germany.
| | - Lars H Lohmann
- University Sports Center, Carl von Ossietzky University Oldenburg, Oldenburg, Germany
| | - Camila D Lima
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Karsten Hollander
- Institute of Interdisciplinary Exercise Science and Sports Medicine, MSH Medical School Hamburg, Hamburg, Germany
| | - Andreas Konrad
- Institute of Human Movement Science, Sport and Health, University of Graz, Graz, Austria
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Astrid Zech
- Department of Human Motion Science and Exercise Physiology, Friedrich Schiller University, Jena, Germany
| | - Masatoshi Nakamura
- Faculty of Rehabilitation Sciences, Nishi Kyushu University, Ozaki, Kanzaki, Saga, Japan
| | - Klaus Wirth
- Institute of Sport Science, University of Applied Sciences Wiener Neustadt, Wiener Neustadt, Austria
| | - Michael Keiner
- Department of Sport Science, German University of Health and Sport, Ismaning, Germany
| | - David G Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada
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10
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Warneke K, Wirth K, Keiner M, Lohmann LH, Hillebrecht M, Brinkmann A, Wohlann T, Schiemann S. Comparison of the effects of long-lasting static stretching and hypertrophy training on maximal strength, muscle thickness and flexibility in the plantar flexors. Eur J Appl Physiol 2023; 123:1773-1787. [PMID: 37029826 PMCID: PMC10363083 DOI: 10.1007/s00421-023-05184-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 03/16/2023] [Indexed: 04/09/2023]
Abstract
Maximal strength measured via maximal voluntary contraction is known as a key factor in competitive sports performance as well as injury risk reduction and rehabilitation. Maximal strength and hypertrophy are commonly trained by performing resistance training programs. However, literature shows that long-term, long-lasting static stretching interventions can also produce significant improvements in maximal voluntary contraction. The aim of this study is to compare increases in maximal voluntary contraction, muscle thickness and flexibility after 6 weeks of stretch training and conventional hypertrophy training. Sixty-nine (69) active participants (f = 30, m = 39; age 27.4 ± 4.4 years, height 175.8 ± 2.1 cm, and weight 79.5 ± 5.9 kg) were divided into three groups: IG1 stretched the plantar flexors continuously for one hour per day, IG2 performed hypertrophy training for the plantar flexors (5 × 10-12 reps, three days per week), while CG did not undergo any intervention. Maximal voluntary contraction, muscle thickness, pennation angle and flexibility were the dependent variables. The results of a series of two-way ANOVAs show significant interaction effects (p < 0.05) for maximal voluntary contraction (ƞ2 = 0.143-0.32, p < 0.006), muscle thickness (ƞ2 = 0.11-0.14, p < 0.021), pennation angle (ƞ2 = 0.002-0.08, p = 0.077-0.625) and flexibility (ƞ2 = 0.089-0.21, p < 0.046) for both the stretch and hypertrophy training group without significant differences (p = 0.37-0.99, d = 0.03-0.4) between both intervention groups. Thus, it can be hypothesized that mechanical tension plays a crucial role in improving maximal voluntary contraction and muscle thickness irrespective whether long-lasting stretching or hypertrophy training is used. Results show that for the calf muscle, the use of long-lasting stretching interventions can be deemed an alternative to conventional resistance training if the aim is to increase maximal voluntary contraction, muscle thickness and flexibility. However, the practical application seems to be strongly limited as a weekly stretching duration of up to 7 h a week is opposed by 3 × 15 min of common resistance training.
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Affiliation(s)
- Konstantin Warneke
- Institute for Exercise, Sport and Health, Leuphana University, 21335, Lüneburg, Germany.
| | - Klaus Wirth
- University of Applied Sciences Wiener Neustadt, Wiener Neustadt, Austria
| | - Michael Keiner
- Department of Sport Science, German University of Health and Sport, 85737, Ismaning, Germany
| | - Lars H Lohmann
- Institute of Sports Science, Carl von Ossietzky University of Oldenburg, 26129, Oldenburg, Germany
| | - Martin Hillebrecht
- University Sports Center, Carl von Ossietzky University of Oldenburg, 26129, Oldenburg, Germany
| | - Anna Brinkmann
- Assistive Systems and Medical Device Technology, Carl von Ossietzky University of Oldenburg, 26129, Oldenburg, Germany
| | - Tim Wohlann
- Institute for Exercise, Sport and Health, Leuphana University, 21335, Lüneburg, Germany
| | - Stephan Schiemann
- Institute for Exercise, Sport and Health, Leuphana University, 21335, Lüneburg, Germany
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11
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Khuu S, Fernandez JW, Handsfield GG. Delayed skeletal muscle repair following inflammatory damage in simulated agent-based models of muscle regeneration. PLoS Comput Biol 2023; 19:e1011042. [PMID: 37023170 PMCID: PMC10128985 DOI: 10.1371/journal.pcbi.1011042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 04/25/2023] [Accepted: 03/21/2023] [Indexed: 04/08/2023] Open
Abstract
Healthy skeletal muscle undergoes repair in response to mechanically localised strains during activities such as exercise. The ability of cells to transduce the external stimuli into a cascade of cell signalling responses is important to the process of muscle repair and regeneration. In chronic myopathies such as Duchenne muscular dystrophy and inflammatory myopathies, muscle is often subject to chronic necrosis and inflammation that perturbs tissue homeostasis and leads to non-localised, widespread damage across the tissue. Here we present an agent-based model that simulates muscle repair in response to both localised eccentric contractions similar to what would be experienced during exercise, and non-localised widespread inflammatory damage that is present in chronic disease. Computational modelling of muscle repair allows for in silico exploration of phenomena related to muscle disease. In our model, widespread inflammation led to delayed clearance of tissue damage, and delayed repair for recovery of initial fibril counts at all damage levels. Macrophage recruitment was delayed and significantly higher in widespread compared to localised damage. At higher damage percentages of 10%, widespread damage led to impaired muscle regeneration and changes in muscle geometry that represented alterations commonly observed in chronic myopathies, such as fibrosis. This computational work offers insight into the progression and aetiology of inflammatory muscle diseases, and suggests a focus on the muscle regeneration cascade in understanding the progression of muscle damage in inflammatory myopathies.
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Affiliation(s)
- Stephanie Khuu
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
| | - Justin W Fernandez
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
- Department of Engineering Science, The University of Auckland, Auckland, New Zealand
| | - Geoffrey G Handsfield
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
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12
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Krauss RS, Kann AP. Muscle stem cells get a new look: Dynamic cellular projections as sensors of the stem cell niche. Bioessays 2023; 45:e2200249. [PMID: 36916774 PMCID: PMC10170654 DOI: 10.1002/bies.202200249] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/16/2023] [Accepted: 02/20/2023] [Indexed: 03/15/2023]
Abstract
Cellular mechanisms whereby quiescent stem cells sense tissue injury and transition to an activated state are largely unknown. Quiescent skeletal muscle stem cells (MuSCs, also called satellite cells) have elaborate, heterogeneous projections that rapidly retract in response to muscle injury. They may therefore act as direct sensors of their niche environment. Retraction is driven by a Rac-to-Rho GTPase activity switch that promotes downstream MuSC activation events. These and other observations lead to several hypotheses: (1) projections are morphologically dynamic at quiescence, providing a surveillance function for muscle damage; (2) quiescent projection dynamics are regulated by the relative balance of Rac and Rho activities promoted by niche-derived cues; (3) projections, particularly their associated filopodia, sense tissue damage via changes to the biomechanical properties of the niche and/or detection of signaling cues released by damaged myofibers; and (4) the dynamic nature of projections result in a population of MuSCs with heterogeneous functional properties. These concepts may extend to other types of quiescent stem cells, as well as prove useful in translational research settings.
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Affiliation(s)
- Robert S Krauss
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Allison P Kann
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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13
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Goncharuk O, Savosko S, Tykhomyrov A, Guzyk M, Medvediev V, Tsymbaliuk V, Chaikovsky Y. Matrix Metalloproteinase-9 is Involved in the Fibrotic Process in Denervated Muscles after Sciatic Nerve Trauma and Recovery. J Neurol Surg A Cent Eur Neurosurg 2023; 84:116-122. [PMID: 34496416 DOI: 10.1055/s-0041-1731750] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Fibrosis of the injured muscles is a problem of recovery from trauma and denervation. The aim of the work was to investigate the interconnection of matrix metalloproteinase-9 (ММР-9) activity in denervated muscles with fibrosis and to estimate its role in nerve restoration by the epineurial suture, fibrin-based glue, and polyethylene glycol hydrogel. The activity of matrix metalloproteinases was estimated by gelatin zymography. Collagen density in muscles was determined histochemically. An increased level of the active MMP-9 is associated with the fibrous changes in the denervated skeletal muscles and after an epineurial suture. The use of fibrin glue and polyethylene glycol hydrogel resulted in a lower level of collagen and ММР-9 activity, which may be a therapeutic target in the treatment of neuromuscular lesions, and has value in fibrosis analysis following microsurgical intervention for peripheral nerve reconstruction.
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Affiliation(s)
- Oleksii Goncharuk
- Department of Neurosurgery, Bogomolets National Medical University, Kyiv, Ukraine
| | - Serhii Savosko
- Department of Histology and Embryology, Bogomolets National Medical University, Kyiv, Ukraine
| | - Artem Tykhomyrov
- Department of Neurosurgery, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine (NASU), Kyiv, Ukraine
| | - Mykhailo Guzyk
- Department of Neurosurgery, Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine (NASU), Kyiv, Ukraine
| | - Volodymyr Medvediev
- Department of Neurosurgery, Bogomolets National Medical University, Kyiv, Ukraine
| | - Vitaliy Tsymbaliuk
- Department of Neurosurgery, Bogomolets National Medical University, Kyiv, Ukraine
| | - Yuri Chaikovsky
- Department of Histology and Embryology, Bogomolets National Medical University, Kyiv, Ukraine
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14
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Tomasch J, Maleiner B, Hromada C, Szwarc-Hofbauer D, Teuschl-Woller AH. Cyclic Tensile Stress Induces Skeletal Muscle Hypertrophy and Myonuclear Accretion in a 3D Model. Tissue Eng Part A 2023; 29:257-268. [PMID: 36606693 DOI: 10.1089/ten.tea.2022.0182] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Skeletal muscle is highly adaptive to mechanical stress due to its resident stem cells and the pronounced level of myotube plasticity. Herein, we study the adaptation to mechanical stress and its underlying molecular mechanisms in a tissue-engineered skeletal muscle model. We subjected differentiated 3D skeletal muscle-like constructs to cyclic tensile stress using a custom-made bioreactor system, which resulted in immediate activation of stress-related signal transducers (Erk1/2, p38). Cell cycle re-entry, increased proliferation, and onset of myogenesis indicated subsequent myoblast activation. Furthermore, elevated focal adhesion kinase and β-catenin activity in mechanically stressed constructs suggested increased cell adhesion and migration. After 3 days of mechanical stress, gene expression of the fusogenic markers MyoMaker and MyoMixer, myotube diameter, myonuclear accretion, as well as S6 activation, were significantly increased. Our results highlight that we established a promising tool to study sustained adaptation to mechanical stress in healthy, hypertrophic, or regenerating skeletal muscle.
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Affiliation(s)
- Janine Tomasch
- Department Life Science Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Babette Maleiner
- Department Life Science Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Carina Hromada
- Department Life Science Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Dorota Szwarc-Hofbauer
- Department Life Science Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Andreas H Teuschl-Woller
- Department Life Science Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
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15
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Wohlann T, Warneke K, Hillebrecht M, Petersmann A, Ferrauti A, Schiemann S. Effects of daily static stretch training over 6 weeks on maximal strength, muscle thickness, contraction properties, and flexibility. Front Sports Act Living 2023; 5:1139065. [PMID: 37139297 PMCID: PMC10149921 DOI: 10.3389/fspor.2023.1139065] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 03/06/2023] [Indexed: 05/05/2023] Open
Abstract
Purpose Static stretch training (SST) with long stretching durations seems to be sufficient to increase flexibility, maximum strength (MSt) and muscle thickness (MTh). However, changes in contraction properties and effects on muscle damage remain unclear. Consequently, the objective of the study was to investigate the effects of a 6-week self-performed SST on MSt, MTh, contractile properties, flexibility, and acute response of creatine kinase (CK) 3 days after SST. Methods Forty-four participants were divided into a control (CG, n = 22) and an intervention group (IG, n = 22), who performed a daily SST for 5 min for the lower limb muscle group. While isometric MSt was measured in leg press, MTh was examined via sonography and flexibility by functional tests. Muscle stiffness and contraction time were measured by tensiomyography on the rectus femoris. Additionally, capillary blood samples were taken in the pretest and in the first 3 days after starting SST to measure CK. Results A significant increase was found for MSt (p < 0.001, η 2 = 0.195) and flexibility in all functional tests (p < 0.001, η 2 > 0.310). Scheffé post hoc test did not show significant differences between the rectus femoris muscle inter- and intragroup comparisons for MTh nor for muscle stiffness and contraction time (p > 0.05, η 2 < 0.100). Moreover, CK was not significantly different between IG and CG with p > 0.05, η 2 = 0.032. Discussion In conclusion, the increase in MSt cannot be exclusively explained by muscular hypertrophy or the increased CK-related repair mechanism after acute stretching. Rather, neuronal adaptations have to be considered. Furthermore, daily 5-min SST over 6 weeks does not seem sufficient to change muscle stiffness or contraction time. Increases in flexibility tests could be attributed to a stretch-induced change in the muscle-tendon complex.
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Affiliation(s)
- Tim Wohlann
- Institute for Exercise, Sport and Health, Leuphana University, Lüneburg, Germany
- Correspondence: Tim Wohlann
| | - Konstantin Warneke
- Institute for Exercise, Sport and Health, Leuphana University, Lüneburg, Germany
| | - Martin Hillebrecht
- University Sports Centre, Carl von University of Oldenburg, Oldenburg, Germany
| | - Astrid Petersmann
- University Institute for Clinical Chemistry and Laboratory Medicine, University Medicine Oldenburg, Oldenburg, Germany
- Institute for Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Greifswald, Germany
| | | | - Stephan Schiemann
- Institute for Exercise, Sport and Health, Leuphana University, Lüneburg, Germany
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16
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Elgaabari A, Imatomi N, Kido H, Seki M, Tanaka S, Matsuyoshi Y, Nakashima T, Sawano S, Mizunoya W, Suzuki T, Nakamura M, Anderson JE, Tatsumi R. A pilot study on nitration/dysfunction of NK1 segment of myogenic stem cell activator HGF. Biochem Biophys Rep 2022; 31:101295. [PMID: 35721345 PMCID: PMC9198319 DOI: 10.1016/j.bbrep.2022.101295] [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: 04/24/2022] [Revised: 05/29/2022] [Accepted: 05/31/2022] [Indexed: 11/30/2022] Open
Abstract
Protein tyrosine residue (Y) nitration, a post-translational chemical-modification mode, has been associated with changes in protein activity and function; hence the accumulation of specific nitrated proteins in tissues may be used to monitor the onset and progression of pathological disorders. To verify the possible impact of nitration on postnatal muscle growth and regeneration, a pilot study was designed to examine the nitration/dysfunction of hepatocyte growth factor (HGF), a key ligand that is released from the extracellular tethering and activates myogenic stem satellite cells to enter the cell cycle upon muscle stretch and injury. Exposure of recombinant HGF (a hetero-dimer of α- and β-chains) to peroxynitrite induces Y nitration in HGF α-chain under physiological conditions. Physiological significance of this finding was emphasized by Western blotting that showed the NK1 segment of HGF (including a K1 domain critical for signaling-receptor c-met binding) undergoes nitration with a primary target of Y198. Peroxynitrite treatment abolished HGF-agonistic activity of the NK1 segment, as revealed by in vitro c-met binding and bromodeoxyuridine-incorporation assays. Importantly, direct-immunofluorescence microscopy of rat lower hind-limb muscles from two aged-groups (2-month-old “young” and 12-month-old “retired/adult”) provided in vivo evidence for age-related nitration of extracellular HGF (Y198). Overall, findings provide the insight that HGF/NK1 nitration/dysfunction perturbs myogenic stem cell dynamics and homeostasis; hence NK1 nitration may stimulate progression of muscular disorders and diseases including sarcopenia. NK1 segment of hepatocyte growth factor (HGF) undergoes tyrosine (Y) nitration. Y198 was identified as a primary target for nitration of NK1. NK1 nitration may abolish HGF-agonistic activity that activates myogenic stem cells. Nitration of extracellular HGF-Y198 was detected in vivo at early aging-phase of rat. Findings may provide a possible strategy to combat progressive muscle-atrophy.
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Affiliation(s)
- Alaa Elgaabari
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
- Department of Physiology, Faculty of Veterinary Medicine, Kafrelsheikh University, El-Geish Street, Kafrelsheikh 33516, Egypt
| | - Nana Imatomi
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Hirochika Kido
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Miyumi Seki
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Sakiho Tanaka
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Yuji Matsuyoshi
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Takashi Nakashima
- Department of Bioscience and Biotechnology, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Shoko Sawano
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Wataru Mizunoya
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Takahiro Suzuki
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Mako Nakamura
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Judy E. Anderson
- Department of Biological Sciences, Faculty of Science, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Ryuichi Tatsumi
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
- Corresponding author. Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture (West#5 bldg.), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan.
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17
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Warneke K, Brinkmann A, Hillebrecht M, Schiemann S. Influence of Long-Lasting Static Stretching on Maximal Strength, Muscle Thickness and Flexibility. Front Physiol 2022; 13:878955. [PMID: 35694390 PMCID: PMC9174468 DOI: 10.3389/fphys.2022.878955] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/28/2022] [Indexed: 12/02/2022] Open
Abstract
Background: In animal studies long-term stretching interventions up to several hours per day have shown large increases in muscle mass as well as maximal strength. The aim of this study was to investigate the effects of a long-term stretching on maximal strength, muscle cross sectional area (MCSA) and range of motion (ROM) in humans. Methods: 52 subjects were divided into an Intervention group (IG, n = 27) and a control group (CG, n = 25). IG stretched the plantar flexors for one hour per day for six weeks using an orthosis. Stretching was performed on one leg only to investigate the contralateral force transfer. Maximal isometric strength (MIS) and 1RM were both measured in extended knee joint. Furthermore, we investigated the MCSA of IG in the lateral head of the gastrocnemius (LG) using sonography. Additionally, ROM in the upper ankle was investigated via the functional “knee to wall stretch” test (KtW) and a goniometer device on the orthosis. A two-way ANOVA was performed in data analysis, using the Scheffé Test as post-hoc test. Results: There were high time-effects (p = 0.003, ƞ² = 0.090) and high interaction-effect (p < 0.001, ƞ²=0.387) for MIS and also high time-effects (p < 0.001, ƞ²=0.193) and interaction-effects (p < 0.001, ƞ²=0,362) for 1RM testing. Furthermore, we measured a significant increase of 15.2% in MCSA of LG with high time-effect (p < 0.001, ƞ²=0.545) and high interaction-effect (p=0.015, ƞ²=0.406). In ROM we found in both tests significant increases up to 27.3% with moderate time-effect (p < 0.001, ƞ²=0.129) and high interaction-effect (p < 0.001, ƞ²=0.199). Additionally, we measured significant contralateral force transfers in maximal strength tests of 11.4% (p < 0.001) in 1RM test and 1.4% (p=0.462) in MIS test. Overall, there we no significant effects in control situations for any parameter (CG and non-intervened leg of IG). Discussion: We hypothesize stretching-induced muscle damage comparable to effects of mechanical load of strength training, that led to hypertrophy and thus to an increase in maximal strength. Increases in ROM could be attributed to longitudinal hypertrophy effects, e.g., increase in serial sarcomeres. Measured cross-education effects could be explained by central neural adaptations due to stimulation of the stretched muscles.
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Affiliation(s)
- Konstantin Warneke
- Department for Exercise, Sport and Health, Leuphana University, Lüneburg, Germany
- *Correspondence: Konstantin Warneke,
| | - Anna Brinkmann
- Assistive Systems and Medical Device Technology, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
- University Sports Center, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Martin Hillebrecht
- Assistive Systems and Medical Device Technology, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
- University Sports Center, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Stephan Schiemann
- Department for Exercise, Sport and Health, Leuphana University, Lüneburg, Germany
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18
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Kim E, Wu F, Lim D, Zeuthen C, Zhang Y, Allen J, Muraine L, Trollet C, Vest KE, Choo HJ. Fibroadipogenic Progenitors Regulate the Basal Proliferation of Satellite Cells and Homeostasis of Pharyngeal Muscles via HGF Secretion. Front Cell Dev Biol 2022; 10:875209. [PMID: 35669512 PMCID: PMC9164287 DOI: 10.3389/fcell.2022.875209] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 04/25/2022] [Indexed: 11/13/2022] Open
Abstract
Skeletal muscle stem cells, known as satellite cells (SCs), are quiescent in normal adult limb muscles. Injury stimulates SC proliferation, differentiation, and fusion to regenerate muscle structure. In pharyngeal muscles, which are critical for swallowing foods and liquids, SCs proliferate and fuse in the absence of injury. It is unknown what factors drive increased basal activity of pharyngeal SCs. Here, we determined how niche factors influence the status of pharyngeal versus limb SCs. In vivo, a subset of pharyngeal SCs present features of activated SCs, including large cell size and increased mitochondrial content. In this study, we discovered that the pharyngeal muscle contains high levels of active hepatocyte growth factor (HGF), which is known to activate SCs in mice and humans. We found that fibroadipogenic progenitors (FAPs) are the major cell type providing HGF and are thus responsible for basal proliferation of SCs in pharyngeal muscles. Lastly, we confirmed the critical role of FAPs for pharyngeal muscle function and maintenance. This study gives new insights to explain the distinctive SC activity of pharyngeal muscles.
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Affiliation(s)
- Eunhye Kim
- Department of Cell Biology, School of Medicine, Emory University, Atlanta, GA, United States
- Laboratory of Molecular Diagnostics and Cell Biology, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Fang Wu
- Department of Cell Biology, School of Medicine, Emory University, Atlanta, GA, United States
| | - Danbi Lim
- Department of Cell Biology, School of Medicine, Emory University, Atlanta, GA, United States
| | - Christopher Zeuthen
- Department of Cell Biology, School of Medicine, Emory University, Atlanta, GA, United States
| | - Yiming Zhang
- Department of Cell Biology, School of Medicine, Emory University, Atlanta, GA, United States
| | - James Allen
- Department of Cell Biology, School of Medicine, Emory University, Atlanta, GA, United States
| | - Laura Muraine
- Sorbonne Université, Inserm, Institut de Myologie, U974, Centre de Recherche en Myologie, Paris, France
| | - Capucine Trollet
- Sorbonne Université, Inserm, Institut de Myologie, U974, Centre de Recherche en Myologie, Paris, France
| | - Katherine E. Vest
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Hyojung J. Choo
- Department of Cell Biology, School of Medicine, Emory University, Atlanta, GA, United States
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19
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Cordingley DM, Anderson JE, Cornish SM. Myokine Response to Blood-Flow Restricted Resistance Exercise in Younger and Older Males in an Untrained and Resistance-Trained State: A Pilot Study. JOURNAL OF SCIENCE IN SPORT AND EXERCISE 2022. [PMCID: PMC9099348 DOI: 10.1007/s42978-022-00164-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Purpose The purpose of this study was to examine the response of myokines to blood-flow restricted resistance-exercise (BFR-RE) in younger and older males before and after completing a 12-week resistance-training program. Methods There were 8 younger (24.8 ± 3.9 yrs) and 7 older (68.3 ± 5.0 yrs) untrained male participants completed this study. Anthropometric and maximal strength (1RM) measurements were collected before and after a 12-week, supervised, progressive full-body resistance-training program. As well, an acute bout of full-body BFR-RE was performed with venipuncture blood samples collected before and immediately following the BFR-RE, followed by sampling at 3, 6, 24 and 48 h. Results The 12-week training program stimulated a 32.2% increase in average strength and 30% increase in strength per kg of fat free mass. The response of particular myokines to the acute bout of BFR-RE was influenced training status (IL-4, untrained = 78.1 ± 133.2 pg/mL vs. trained = 59.8 ± 121.6 pg/mL, P = 0.019; IL-7, untrained = 3.46 ± 1.8 pg/mL vs. trained = 2.66 ± 1.3 pg/mL, P = 0.047) or both training and age (irisin, P = 0.04; leukemia inhibitory factor, P < 0.001). As well, changes in strength per kg of fat free mass were correlated with area under the curve for IL-4 (r = 0.537; P = 0.039), IL-6 (r = 0. 525; P = 0.044) and LIF (r = − 0.548; P = 0.035) in the untrained condition. Conclusion This study identified that both age and training status influence the myokine response to an acute bout of BFR-RE with the release of IL-4, IL-6 and LIF in the untrained state being associated with changes in strength per kg of fat free mass.
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Affiliation(s)
- Dean M. Cordingley
- Applied Health Sciences, University of Manitoba, Winnipeg, MB R3T 2N2 Canada
- Pan Am Clinic Foundation, 75 Poseidon Bay, Winnipeg, MB R3M 3E4 Canada
| | | | - Stephen M. Cornish
- Applied Health Sciences, University of Manitoba, Winnipeg, MB R3T 2N2 Canada
- Faculty of Kinesiology and Recreation Management, University of Manitoba, 110 Frank Kennedy Centre, Winnipeg, MB R3T 2N2 Canada
- Centre for Aging, University of Manitoba, Winnipeg, MB R3T 2N2 Canada
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20
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Anderson JE. Key concepts in muscle regeneration: muscle "cellular ecology" integrates a gestalt of cellular cross-talk, motility, and activity to remodel structure and restore function. Eur J Appl Physiol 2022; 122:273-300. [PMID: 34928395 PMCID: PMC8685813 DOI: 10.1007/s00421-021-04865-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 11/10/2021] [Indexed: 12/21/2022]
Abstract
This review identifies some key concepts of muscle regeneration, viewed from perspectives of classical and modern research. Early insights noted the pattern and sequence of regeneration across species was similar, regardless of the type of injury, and differed from epimorphic limb regeneration. While potential benefits of exercise for tissue repair was debated, regeneration was not presumed to deliver functional restoration, especially after ischemia-reperfusion injury; muscle could develop fibrosis and ectopic bone and fat. Standard protocols and tools were identified as necessary for tracking injury and outcomes. Current concepts vastly extend early insights. Myogenic regeneration occurs within the environment of muscle tissue. Intercellular cross-talk generates an interactive system of cellular networks that with the extracellular matrix and local, regional, and systemic influences, forms the larger gestalt of the satellite cell niche. Regenerative potential and adaptive plasticity are overlain by epigenetically regionalized responsiveness and contributions by myogenic, endothelial, and fibroadipogenic progenitors and inflammatory and metabolic processes. Muscle architecture is a living portrait of functional regulatory hierarchies, while cellular dynamics, physical activity, and muscle-tendon-bone biomechanics arbitrate regeneration. The scope of ongoing research-from molecules and exosomes to morphology and physiology-reveals compelling new concepts in muscle regeneration that will guide future discoveries for use in application to fitness, rehabilitation, and disease prevention and treatment.
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Affiliation(s)
- Judy E Anderson
- Department of Biological Sciences, Faculty of Science, University of Manitoba, 50 Sifton Road, Winnipeg, MB, R3T 2N2, Canada.
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21
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Haroon M, Boers HE, Bakker AD, Bloks NGC, Hoogaars WMH, Giordani L, Musters RJP, Deldicque L, Koppo K, Le Grand F, Klein-Nulend J, Jaspers RT. Reduced growth rate of aged muscle stem cells is associated with impaired mechanosensitivity. Aging (Albany NY) 2022; 14:28-53. [PMID: 35023852 PMCID: PMC8791224 DOI: 10.18632/aging.203830] [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: 02/24/2021] [Accepted: 01/03/2022] [Indexed: 11/25/2022]
Abstract
Aging-associated muscle wasting and impaired regeneration are caused by deficiencies in muscle stem cell (MuSC) number and function. We postulated that aged MuSCs are intrinsically impaired in their responsiveness to omnipresent mechanical cues through alterations in MuSC morphology, mechanical properties, and number of integrins, culminating in impaired proliferative capacity. Here we show that aged MuSCs exhibited significantly lower growth rate and reduced integrin-α7 expression as well as lower number of phospho-paxillin clusters than young MuSCs. Moreover, aged MuSCs were less firmly attached to matrigel-coated glass substrates compared to young MuSCs, as 43% of the cells detached in response to pulsating fluid shear stress (1 Pa). YAP nuclear localization was 59% higher than in young MuSCs, yet YAP target genes Cyr61 and Ctgf were substantially downregulated. When subjected to pulsating fluid shear stress, aged MuSCs exhibited reduced upregulation of proliferation-related genes. Together these results indicate that aged MuSCs exhibit impaired mechanosensitivity and growth potential, accompanied by altered morphology and mechanical properties as well as reduced integrin-α7 expression. Aging-associated impaired muscle regenerative capacity and muscle wasting is likely due to aging-induced intrinsic MuSC alterations and dysfunctional mechanosensitivity.
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Affiliation(s)
- Mohammad Haroon
- Laboratory for Myology, Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HZ, The Netherlands
| | - Heleen E Boers
- Laboratory for Myology, Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HZ, The Netherlands
| | - Astrid D Bakker
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 LA, The Netherlands
| | - Niek G C Bloks
- Laboratory for Myology, Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HZ, The Netherlands
| | - Willem M H Hoogaars
- Laboratory for Myology, Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HZ, The Netherlands
| | - Lorenzo Giordani
- Sorbonne Université, INSERM UMRS974, Center for Research in Myology, Paris 75013, France
| | - René J P Musters
- Department of Physiology, Amsterdam University Medical Center VUmc, Amsterdam Cardiovascular Sciences, Amsterdam 1081 HZ, The Netherlands
| | - Louise Deldicque
- Institute of Neuroscience, Université Catholique de Louvain, Louvain-la-Neuve 1348, Belgium
| | - Katrien Koppo
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven 3001, Belgium
| | - Fabien Le Grand
- Faculty of Medicine and Pharmacy, NeuroMyoGène UCBL-CNRS UMR 5310, INSERM U1217, Lyon 69008, France
| | - Jenneke Klein-Nulend
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 LA, The Netherlands
| | - Richard T Jaspers
- Laboratory for Myology, Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HZ, The Netherlands
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22
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Kaneshige A, Kaji T, Zhang L, Saito H, Nakamura A, Kurosawa T, Ikemoto-Uezumi M, Tsujikawa K, Seno S, Hori M, Saito Y, Matozaki T, Maehara K, Ohkawa Y, Potente M, Watanabe S, Braun T, Uezumi A, Fukada SI. Relayed signaling between mesenchymal progenitors and muscle stem cells ensures adaptive stem cell response to increased mechanical load. Cell Stem Cell 2021; 29:265-280.e6. [PMID: 34856120 DOI: 10.1016/j.stem.2021.11.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 09/24/2021] [Accepted: 11/09/2021] [Indexed: 11/29/2022]
Abstract
Adaptation to mechanical load, leading to enhanced force and power output, is a characteristic feature of skeletal muscle. Formation of new myonuclei required for efficient muscle hypertrophy relies on prior activation and proliferation of muscle stem cells (MuSCs). However, the mechanisms controlling MuSC expansion under conditions of increased load are not fully understood. Here we demonstrate that interstitial mesenchymal progenitors respond to mechanical load and stimulate MuSC proliferation in a surgical mouse model of increased muscle load. Mechanistically, transcriptional activation of Yes-associated protein 1 (Yap1)/transcriptional coactivator with PDZ-binding motif (Taz) in mesenchymal progenitors results in local production of thrombospondin-1 (Thbs1), which, in turn, drives MuSC proliferation through CD47 signaling. Under homeostatic conditions, however, CD47 signaling is insufficient to promote MuSC proliferation and instead depends on prior downregulation of the Calcitonin receptor. Our results suggest that relayed signaling between mesenchymal progenitors and MuSCs through a Yap1/Taz-Thbs1-CD47 pathway is critical to establish the supply of MuSCs during muscle hypertrophy.
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Affiliation(s)
- Akihiro Kaneshige
- Project for Muscle Stem Cell Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan; Biological/Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan; Laboratory of Molecular and Cellular Physiology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Takayuki Kaji
- Project for Muscle Stem Cell Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Lidan Zhang
- Project for Muscle Stem Cell Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Hayato Saito
- Project for Muscle Stem Cell Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Ayasa Nakamura
- Project for Muscle Stem Cell Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Tamaki Kurosawa
- Muscle Aging and Regenerative Medicine, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi, Tokyo 173-0015, Japan; Laboratory of Veterinary Pharmacology, Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, Tokyo University, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Madoka Ikemoto-Uezumi
- Muscle Aging and Regenerative Medicine, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi, Tokyo 173-0015, Japan
| | - Kazutake Tsujikawa
- Laboratory of Molecular and Cellular Physiology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Shigeto Seno
- Department of Bioinformatic Engineering, Graduate School of Information Science and Technology, Osaka University, 1-5 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Masatoshi Hori
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, Tokyo University, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yasuyuki Saito
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
| | - Takashi Matozaki
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
| | - Kazumitsu Maehara
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan
| | - Yasuyuki Ohkawa
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan
| | - Michael Potente
- Angiogenesis & Metabolism Laboratory, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany; Berlin Institute of Health at Charité (BIH) - Universitätsmedizin Berlin, 13125 Berlin, Germany; Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany
| | - Shuichi Watanabe
- Department of Cardiac Development and Remodeling, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Thomas Braun
- Department of Cardiac Development and Remodeling, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Akiyoshi Uezumi
- Muscle Aging and Regenerative Medicine, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi, Tokyo 173-0015, Japan.
| | - So-Ichiro Fukada
- Project for Muscle Stem Cell Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
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23
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Wang Y, Ikeda S, Ikoma K. Efficacy of passive repetitive stretching of skeletal muscle on myofiber hypertrophy and genetic suppression on MAFbx, MuRF1, and myostatin. J Muscle Res Cell Motil 2021; 42:443-451. [PMID: 34664159 DOI: 10.1007/s10974-021-09609-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 10/11/2021] [Indexed: 01/07/2023]
Abstract
Skeletal muscles undergo adaptations in response to mechanical stimuli such as stretching. However, there is limited evidence regarding the hypertrophic effects of passive repetitive stretching in vivo. We examined the effect of passive repetitive stretching on skeletal muscle myofiber morphology, satellite cell content, and messenger RNA expression of myogenic regulatory factors and signaling molecules involved in muscle protein synthesis and degradation. The gastrocnemius muscles of mice were stretched 15 times/min by manual ankle dorsiflexion for 15 min, 5 days a week for 2 weeks. We found that passive repetitive stretching significantly increased myofiber cross-sectional area. In stretched gastrocnemius muscles, the messenger RNA expression of p70S6K and myogenin was upregulated, whereas MuRF1, MAFbx, myostatin, and 4E-BP1 were downregulated. The phosphorylation level of p70S6K was significantly increased in stretched muscles. The number of Pax7+ cells was unaffected. Passive repetitive stretching induces muscle hypertrophy by regulating signaling pathways involved in muscle protein turnover. These findings are applicable to clinical muscle strengthening and for the maintenance of skeletal muscle mass and function in patients who are unconscious or paralyzed.
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Affiliation(s)
- Yumin Wang
- Department of Rehabilitation Medicine, Hokkaido University Graduate School of Medicine, Kita 15, Nishi 7, Kitaku, Sapporo-shi, Hokkaido, 060-8638, Japan
| | - Satoshi Ikeda
- Department of Rehabilitation Medicine, Hokkaido University Hospital, Kita 14, Nishi 5, Kitaku, Sapporo-shi, Hokkaido, 060-8648, Japan.
| | - Katsunori Ikoma
- Department of Rehabilitation Medicine, Hokkaido University Hospital, Kita 14, Nishi 5, Kitaku, Sapporo-shi, Hokkaido, 060-8648, Japan
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24
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Murach KA, Fry CS, Dupont-Versteegden EE, McCarthy JJ, Peterson CA. Fusion and beyond: Satellite cell contributions to loading-induced skeletal muscle adaptation. FASEB J 2021; 35:e21893. [PMID: 34480776 PMCID: PMC9293230 DOI: 10.1096/fj.202101096r] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 12/14/2022]
Abstract
Satellite cells support adult skeletal muscle fiber adaptations to loading in numerous ways. The fusion of satellite cells, driven by cell-autonomous and/or extrinsic factors, contributes new myonuclei to muscle fibers, associates with load-induced hypertrophy, and may support focal membrane damage repair and long-term myonuclear transcriptional output. Recent studies have also revealed that satellite cells communicate within their niche to mediate muscle remodeling in response to resistance exercise, regulating the activity of numerous cell types through various mechanisms such as secretory signaling and cell-cell contact. Muscular adaptation to resistance and endurance activity can be initiated and sustained for a period of time in the absence of satellite cells, but satellite cell participation is ultimately required to achieve full adaptive potential, be it growth, function, or proprioceptive coordination. While significant progress has been made in understanding the roles of satellite cells in adult muscle over the last few decades, many conclusions have been extrapolated from regeneration studies. This review highlights our current understanding of satellite cell behavior and contributions to adaptation outside of regeneration in adult muscle, as well as the roles of satellite cells beyond fusion and myonuclear accretion, which are gaining broader recognition.
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Affiliation(s)
- Kevin A Murach
- The Center for Muscle Biology, University of Kentucky, Lexington, Kentucky, USA.,Molecular Muscle Mass Regulation Laboratory, Exercise Science Research Center, Department of Health, Human Performance, and Recreation, University of Arkansas, Fayetteville, Arkansas, USA.,Cell and Molecular Biology Program, University of Arkansas, Fayetteville, Arkansas, USA
| | - Christopher S Fry
- The Center for Muscle Biology, University of Kentucky, Lexington, Kentucky, USA.,Department of Athletic Training and Clinical Nutrition, College of Health Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Esther E Dupont-Versteegden
- The Center for Muscle Biology, University of Kentucky, Lexington, Kentucky, USA.,Department of Physical Therapy, College of Health Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - John J McCarthy
- The Center for Muscle Biology, University of Kentucky, Lexington, Kentucky, USA.,Department of Physiology, College of Medicine, University of Kentucky, Lexington, Kentucky, USA
| | - Charlotte A Peterson
- The Center for Muscle Biology, University of Kentucky, Lexington, Kentucky, USA.,Department of Physical Therapy, College of Health Sciences, University of Kentucky, Lexington, Kentucky, USA.,Department of Physiology, College of Medicine, University of Kentucky, Lexington, Kentucky, USA
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25
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Vilchinskaya NA, Shenkman BS. Myosatellite Cells under Gravitational Unloading Conditions. J EVOL BIOCHEM PHYS+ 2021. [DOI: 10.1134/s0022093021040098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Myofiber stretch induces tensile and shear deformation of muscle stem cells in their native niche. Biophys J 2021; 120:2665-2678. [PMID: 34087215 PMCID: PMC8390894 DOI: 10.1016/j.bpj.2021.05.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 05/02/2021] [Accepted: 05/18/2021] [Indexed: 12/28/2022] Open
Abstract
Muscle stem cells (MuSCs) are requisite for skeletal muscle regeneration and homeostasis. Proper functioning of MuSCs, including activation, proliferation, and fate decision, is determined by an orchestrated series of events and communication between MuSCs and their niche. A multitude of biochemical stimuli are known to regulate MuSC fate and function. However, in addition to biochemical factors, it is conceivable that MuSCs are subjected to mechanical forces during muscle stretch-shortening cycles because of myofascial connections between MuSCs and myofibers. MuSCs respond to mechanical forces in vitro, but it remains to be proven whether physical forces are also exerted on MuSCs in their native niche and whether they contribute to the functioning and fate of MuSCs. MuSC deformation in their native niche resulting from mechanical loading of ex vivo myofiber bundles was visualized utilizing mT/mG double-fluorescent Cre-reporter mouse and multiphoton microscopy. MuSCs were subjected to 1 h pulsating fluid shear stress (PFSS) with a peak shear stress rate of 6.5 Pa/s. After PFSS treatment, nitric oxide, messenger RNA (mRNA) expression levels of genes involved in regulation of MuSC proliferation and differentiation, ERK 1/2, p38, and AKT activation were determined. Ex vivo stretching of extensor digitorum longus and soleus myofiber bundles caused compression as well as tensile and shear deformation of MuSCs in their niche. MuSCs responded to PFSS in vitro with increased nitric oxide production and an upward trend in iNOS mRNA levels. PFSS enhanced gene expression of c-Fos, Cdk4, and IL-6, whereas expression of Wnt1, MyoD, Myog, Wnt5a, COX2, Rspo1, Vangl2, Wnt10b, and MGF remained unchanged. ERK 1/2 and p38 MAPK signaling were also upregulated after PFSS treatment. We conclude that MuSCs in their native niche are subjected to force-induced deformations due to myofiber stretch-shortening. Moreover, MuSCs are mechanoresponsive, as evidenced by PFSS-mediated expression of factors by MuSCs known to promote proliferation.
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27
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Ishikawa J, Takeo M, Iwadate A, Koya J, Kihira M, Oshima M, Suzuki Y, Taniguchi K, Kobayashi A, Tsuji T. Mechanical homeostasis of liver sinusoid is involved in the initiation and termination of liver regeneration. Commun Biol 2021; 4:409. [PMID: 33828226 PMCID: PMC8027462 DOI: 10.1038/s42003-021-01936-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 02/23/2021] [Indexed: 12/12/2022] Open
Abstract
Organogenesis and regeneration are fundamental for developmental progress and are associated with morphogenesis, size control and functional properties for whole-body homeostasis. The liver plays an essential role in maintaining homeostasis of the entire body through various functions, including metabolic functions, detoxification, and production of bile, via the three-dimensional spatial arrangement of hepatic lobules and has high regenerative capacity. The regeneration occurs as hypertrophy, which strictly controls the size and lobule structure. In this study, we established a three-dimensional sinusoidal network analysis method and determined valuable parameters after partial hepatectomy by comparison to the static phase of the liver. We found that mechanical homeostasis, which is crucial for organ morphogenesis and functions in various phenomena, plays essential roles in liver regeneration for both initiation and termination of liver regeneration, which is regulated by cytokine networks. Mechanical homeostasis plays critical roles in the initiation and termination of organogenesis, tissue repair and organ regeneration in coordination with cytokine networks.
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Affiliation(s)
- Jun Ishikawa
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Hyogo, Japan
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, Japan
| | - Makoto Takeo
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Hyogo, Japan
| | - Ayako Iwadate
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, Japan
| | - Junko Koya
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, Japan
| | - Miho Kihira
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, Japan
| | - Masamitsu Oshima
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Hyogo, Japan
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - Yuki Suzuki
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, Japan
| | - Kazushi Taniguchi
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, Japan
| | - Ayaka Kobayashi
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, Japan
| | - Takashi Tsuji
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Hyogo, Japan.
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, Japan.
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Yahata K, Konrad A, Sato S, Kiyono R, Yoshida R, Fukaya T, Nunes JP, Nakamura M. Effects of a high-volume static stretching programme on plantar-flexor muscle strength and architecture. Eur J Appl Physiol 2021; 121:1159-1166. [PMID: 33502614 DOI: 10.1007/s00421-021-04608-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/17/2021] [Indexed: 02/04/2023]
Abstract
PURPOSE Static stretching (SS) is performed in various settings, but there is no consensus about the effects of SS programmes on changes in muscle morphofunction. This study aimed to investigate the effects of a high-volume SS programme on muscle strength and architecture. METHODS Sixteen healthy young male adults participated, and the dominant leg was defined as the intervention side, with the non-dominant leg as the control side. Stretching exercises were performed two times per week (6 sets of 5 min, totally 30 min per session,) for 5-week using a stretching board under the supervision of the research team. Before and after SS intervention programme, plantar-flexor strength (maximum voluntary isometric contraction, MVC-ISO; maximum voluntary concentric contraction, MVC-CON) and architecture (muscle thickness, pennation angle, and fascicle length) were measured via dynamometer and ultrasound, respectively. RESULTS Following the SS-training programme, significant increases were observed for stretching side in MVIC-ISO at neutral ankle position (p = 0.02, d = 0.31, Δ = 6.4 ± 9.9%) and MVC-CON at 120°/s (p = 0.02, d = 0.30, Δ = 7.8 ± 9.1%), with no significant change on the control side. There was no significant change in any measure of muscle architecture for both intervention and control sides. CONCLUSION Five-week high-volume SS induced positive changes on some measures of muscle strength but not hypertrophy of plantar-flexor muscles. Even with a volume much greater than already tested, the low strain offered by the SS per set seems be insufficient to induce architectural changes on skeletal muscle.
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Affiliation(s)
- Kaoru Yahata
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata, 950-3198, Japan
| | - Andreas Konrad
- Institute of Human Movement Science, Sport and Health, University of Graz, Mozartgasse 14, 8010, Graz, Austria
| | - Shigeru Sato
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata, 950-3198, Japan
| | - Ryosuke Kiyono
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata, 950-3198, Japan
| | - Riku Yoshida
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata, 950-3198, Japan
| | - Taizan Fukaya
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata, 950-3198, Japan
- Department of Rehabilitation, Kyoto Kujo Hospital, 10 Karahashirajoumoncho, Minami-ku, Kyoto, 601-8453, Japan
| | - João Pedro Nunes
- Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina, 86057-970, PR, Brazil
| | - Masatoshi Nakamura
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata, 950-3198, Japan.
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata, 950-3198, Japan.
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29
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Millward DJ. Interactions between Growth of Muscle and Stature: Mechanisms Involved and Their Nutritional Sensitivity to Dietary Protein: The Protein-Stat Revisited. Nutrients 2021; 13:729. [PMID: 33668846 PMCID: PMC7996181 DOI: 10.3390/nu13030729] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 02/15/2021] [Accepted: 02/22/2021] [Indexed: 02/07/2023] Open
Abstract
Childhood growth and its sensitivity to dietary protein is reviewed within a Protein-Stat model of growth regulation. The coordination of growth of muscle and stature is a combination of genetic programming, and of two-way mechanical interactions involving the mechanotransduction of muscle growth through stretching by bone length growth, the core Protein-Stat feature, and the strengthening of bone through muscle contraction via the mechanostat. Thus, growth in bone length is the initiating event and this is always observed. Endocrine and cellular mechanisms of growth in stature are reviewed in terms of the growth hormone-insulin like growth factor-1 (GH-IGF-1) and thyroid axes and the sex hormones, which together mediate endochondral ossification in the growth plate and bone lengthening. Cellular mechanisms of muscle growth during development are then reviewed identifying (a) the difficulties posed by the need to maintain its ultrastructure during myofibre hypertrophy within the extracellular matrix and the concept of muscle as concentric "bags" allowing growth to be conceived as bag enlargement and filling, (b) the cellular and molecular mechanisms involved in the mechanotransduction of satellite and mesenchymal stromal cells, to enable both connective tissue remodelling and provision of new myonuclei to aid myofibre hypertrophy and (c) the implications of myofibre hypertrophy for protein turnover within the myonuclear domain. Experimental data from rodent and avian animal models illustrate likely changes in DNA domain size and protein turnover during developmental and stretch-induced muscle growth and between different muscle fibre types. Growth of muscle in male rats during adulthood suggests that "bag enlargement" is achieved mainly through the action of mesenchymal stromal cells. Current understanding of the nutritional regulation of protein deposition in muscle, deriving from experimental studies in animals and human adults, is reviewed, identifying regulation by amino acids, insulin and myofibre volume changes acting to increase both ribosomal capacity and efficiency of muscle protein synthesis via the mechanistic target of rapamycin complex 1 (mTORC1) and the phenomenon of a "bag-full" inhibitory signal has been identified in human skeletal muscle. The final section deals with the nutritional sensitivity of growth of muscle and stature to dietary protein in children. Growth in length/height as a function of dietary protein intake is described in the context of the breastfed child as the normative growth model, and the "Early Protein Hypothesis" linking high protein intakes in infancy to later adiposity. The extensive paediatric studies on serum IGF-1 and child growth are reviewed but their clinical relevance is of limited value for understanding growth regulation; a role in energy metabolism and homeostasis, acting with insulin to mediate adiposity, is probably more important. Information on the influence of dietary protein on muscle mass per se as opposed to lean body mass is limited but suggests that increased protein intake in children is unable to promote muscle growth in excess of that linked to genotypic growth in length/height. One possible exception is milk protein intake, which cohort and cross-cultural studies suggest can increase height and associated muscle growth, although such effects have yet to be demonstrated by randomised controlled trials.
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Affiliation(s)
- D Joe Millward
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK
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30
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Guan F, Wu J, Li J, Liu S, Weng Y, Chen T, Yang T, Fang K. RETRACTED ARTICLE: Inducible nitric oxide synthase promotes differentiation of satellite cells and prevents stress urinary incontinence via HGF-mediated p38/MAPK signaling. World J Urol 2021; 39:633. [PMID: 32556674 DOI: 10.1007/s00345-020-03289-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/28/2020] [Indexed: 01/06/2023] Open
Affiliation(s)
- Fei Guan
- Department of Urology, The 2nd Hospital of Kunming Medical University, No. 374, Dianmian AvenueYunnan Province, Kunming, 650101, People's Republic of China
- The 4th Hospital of Changde, Changde, 415000, People's Republic of China
| | - Jing Wu
- Department of Biochemistry and Molecular Biology, The Primary Medicine School of Kunming Medical University, Kunming, 650500, People's Republic of China
| | - Jiang Li
- Department of Urology, The 1st Hospital of Qujing, Qujing, 650500, People's Republic of China
| | - Shang Liu
- Department of Urology, The 2nd Hospital of Kunming Medical University, No. 374, Dianmian AvenueYunnan Province, Kunming, 650101, People's Republic of China
| | - Yuting Weng
- Department of Urology, The 2nd Hospital of Kunming Medical University, No. 374, Dianmian AvenueYunnan Province, Kunming, 650101, People's Republic of China
| | - Tao Chen
- Department of Urology, The 2nd Hospital of Kunming Medical University, No. 374, Dianmian AvenueYunnan Province, Kunming, 650101, People's Republic of China
| | - Tongxin Yang
- Department of Urology, The 2nd Hospital of Kunming Medical University, No. 374, Dianmian AvenueYunnan Province, Kunming, 650101, People's Republic of China
| | - Kewei Fang
- Department of Urology, The 2nd Hospital of Kunming Medical University, No. 374, Dianmian AvenueYunnan Province, Kunming, 650101, People's Republic of China.
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31
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Krysztofiak H, Wleklik M, Migaj J, Dudek M, Uchmanowicz I, Lisiak M, Kubielas G, Straburzyńska-Migaj E, Lesiak M, Kałużna-Oleksy M. Cardiac Cachexia: A Well-Known but Challenging Complication of Heart Failure. Clin Interv Aging 2020; 15:2041-2051. [PMID: 33173285 PMCID: PMC7646468 DOI: 10.2147/cia.s273967] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 10/01/2020] [Indexed: 02/06/2023] Open
Abstract
Heart failure (HF) is a common complication of various cardiac diseases, and its incidence constantly increases. This is caused mainly by aging of populations and improvement in the treatment of coronary artery disease. As HF patients age, they tend to develop comorbidities, creating new problems for health-care professionals. Sarcopenia, defined as the loss of muscle mass and function, and cachexia, defined as weight loss due to an underlying illness, are muscle wasting disorders of particular relevance in the heart failure population, but they go mostly unrecognized. The coexistence of chronic HF and metabolic disorders facilitates the development of cachexia. Cachexia, in turn, significantly worsens a patient’s prognosis and quality of life. The mechanisms underlying cachexia have not been explained yet and require further research. Understanding its background is crucial in the development of treatment strategies to prevent and treat tissue wasting. There are currently no specific European guidelines or recommended therapy for cachexia treatment in HF (“cardiac cachexia”).
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Affiliation(s)
- Helena Krysztofiak
- 1st Department of Cardiology, University of Medical Sciences in Poznan, Poznan, Poland
| | - Marta Wleklik
- Department of Clinical Nursing, Wroclaw Medical University, Wroclaw, Poland
| | - Jacek Migaj
- 1st Department of Cardiology, University of Medical Sciences in Poznan, Poznan, Poland.,Poznan University of Medical Sciences Hospital of Lord's Transfiguration, Poznan, Poland
| | - Magdalena Dudek
- 1st Department of Cardiology, University of Medical Sciences in Poznan, Poznan, Poland.,Poznan University of Medical Sciences Hospital of Lord's Transfiguration, Poznan, Poland
| | | | - Magdalena Lisiak
- Department of Clinical Nursing, Wroclaw Medical University, Wroclaw, Poland
| | - Grzegorz Kubielas
- Department of Clinical Nursing, Wroclaw Medical University, Wroclaw, Poland
| | - Ewa Straburzyńska-Migaj
- 1st Department of Cardiology, University of Medical Sciences in Poznan, Poznan, Poland.,Poznan University of Medical Sciences Hospital of Lord's Transfiguration, Poznan, Poland
| | - Maciej Lesiak
- 1st Department of Cardiology, University of Medical Sciences in Poznan, Poznan, Poland.,Poznan University of Medical Sciences Hospital of Lord's Transfiguration, Poznan, Poland
| | - Marta Kałużna-Oleksy
- 1st Department of Cardiology, University of Medical Sciences in Poznan, Poznan, Poland.,Poznan University of Medical Sciences Hospital of Lord's Transfiguration, Poznan, Poland
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32
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Sato S, Hiraizumi K, Kiyono R, Fukaya T, Nishishita S, Nunes JP, Nakamura M. The effects of static stretching programs on muscle strength and muscle architecture of the medial gastrocnemius. PLoS One 2020; 15:e0235679. [PMID: 32645095 PMCID: PMC7347101 DOI: 10.1371/journal.pone.0235679] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 06/19/2020] [Indexed: 11/18/2022] Open
Abstract
Introduction Static stretching (SS) program are widely used in clinical and athletic settings. Many previous studies investigate the effect of SS program on muscle strength and muscle architecture (muscle thickness, and pennation angleh). However, no consensus has been reached about the effect of SS programs on muscle strength and muscle architecture. The aim of this study was to investigate the effects of 6-week SS programs performed at different weekly frequencies on muscle strength, muscle thickness and pennation angle at different ankle joint positions. Methods A total of 24 healthy male volunteers were performed 6-week SS programs (2,160 s of SS: 360 s/week*6 weeks) and were randomized to a group that performed SS once a week, or a group that performed SS three times per week. Total time under stretching was equated between groups. The muscle strength (maximum voluntary isometric contraction) at three different ankle joints were assessed before and after the 6-week SS program. In addition, muscle thickness and pennation angle were assessed by ultrasonography before and after 6-week SS program. Results There were no significant changes in all variables before and after the 6-week SS program, regardless of weekly frequency (p > 0.05). Conclusions Our results suggest that 6-week SS programs do not increase muscle strength or muscle architecture at different ankle joint positions, regardless of stretching frequency; however, no negative effect on these outcomes was observed, contrary to evidence on the immediate, detrimental effects of SS.
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Affiliation(s)
- Shigeru Sato
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Japan
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata City, Japan
| | - Kakeru Hiraizumi
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata City, Japan
| | - Ryosuke Kiyono
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Japan
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata City, Japan
| | - Taizan Fukaya
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Japan
- Department of Rehabilitation, Kyoto Kujo Hospital, Minami-ku, Japan
| | - Satoru Nishishita
- Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
- Institute of Rehabilitation Science, Tokuyukai Medical Corporation, Toyonaka, Japan
- Kansai Rehabilitation Hospital, Tokuyukai Medical Corporation, Toyonaka, Japan
| | - João Pedro Nunes
- Metabolism, Nutrition and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina, Brazil
| | - Masatoshi Nakamura
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Japan
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata City, Japan
- * E-mail:
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Roveimiab Z, Lin F, Anderson JE. Traction and attraction: haptotaxis substrates collagen and fibronectin interact with chemotaxis by HGF to regulate myoblast migration in a microfluidic device. Am J Physiol Cell Physiol 2020; 319:C75-C92. [PMID: 32348173 DOI: 10.1152/ajpcell.00417.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cell migration is central to development, wound healing, tissue regeneration, and immunity. Despite extensive knowledge of muscle regeneration, myoblast migration during regeneration is not well understood. C2C12 mouse myoblast migration and morphology were investigated using a triple-docking polydimethylsiloxane-based microfluidic device in which cells moved under gravity-driven laminar flow on uniform (=) collagen (CN=), fibronectin (FN=), or opposing gradients (CN-FN or FN-CN). In haptotaxis experiments, migration was faster on FN= than on CN=. At 10 h, cells were more elongated on FN-CN and migration was faster than on the CN-FN substrate. Net migration distance on FN-CN at 10 h was greater than on CN-FN, as cells rapidly entered the channel as a larger population (bulk-cell movement, wave 1). Hepatocyte growth factor (HGF) stimulated rapid chemotaxis on FN= but not CN=, increasing migration speed at 10 h early in the channel at low HGF in a steep HGF gradient. HGF accelerated migration on FN= and bulk-cell movement on both uniform substrates. An HGF gradient also slowed cells in wave 2 moving on FN-CN, not CN-FN. Both opposing-gradient substrates affected the shape, speed, and net distance of migrating cells. Gradient and uniform configurations of HGF and substrate differentially influenced migration behavior. Therefore, haptotaxis substrate configuration potently modifies myoblast chemotaxis by HGF. Innovative microfluidic experiments advance our understanding of intricate complexities of myoblast migration. Findings can be leveraged to engineer muscle-tissue volumes for transplantation after serious injury. New analytical approaches may generate broader insights into cell migration.
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Affiliation(s)
- Ziba Roveimiab
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.,Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Francis Lin
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.,Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Judy E Anderson
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
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Nunes JP, Schoenfeld BJ, Nakamura M, Ribeiro AS, Cunha PM, Cyrino ES. Does stretch training induce muscle hypertrophy in humans? A review of the literature. Clin Physiol Funct Imaging 2020; 40:148-156. [DOI: 10.1111/cpf.12622] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 12/24/2019] [Accepted: 01/22/2020] [Indexed: 12/15/2022]
Affiliation(s)
- João Pedro Nunes
- Metabolism, Nutrition, and Exercise Laboratory Physical Education and Sport Center Londrina State University Londrina Brazil
| | | | - Masatoshi Nakamura
- Institute for Human Movement and Medical Sciences Niigata University of Health and Welfare Niigata Japan
| | - Alex S. Ribeiro
- Metabolism, Nutrition, and Exercise Laboratory Physical Education and Sport Center Londrina State University Londrina Brazil
- Center for Research in Health Sciences University of Northern Paraná Londrina Brazil
| | - Paolo M. Cunha
- Metabolism, Nutrition, and Exercise Laboratory Physical Education and Sport Center Londrina State University Londrina Brazil
| | - Edilson S. Cyrino
- Metabolism, Nutrition, and Exercise Laboratory Physical Education and Sport Center Londrina State University Londrina Brazil
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Wang Y, Song J, Liu X, Liu J, Zhang Q, Yan X, Yuan X, Ren D. Multiple Effects of Mechanical Stretch on Myogenic Progenitor Cells. Stem Cells Dev 2020; 29:336-352. [PMID: 31950873 DOI: 10.1089/scd.2019.0286] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Yaqi Wang
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
| | - Jing Song
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
| | - Xinqiang Liu
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Jun Liu
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Qiang Zhang
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
| | - Xiao Yan
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
| | - Xiao Yuan
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Dapeng Ren
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
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36
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Milewska M, Domoradzki T, Majewska A, Błaszczyk M, Gajewska M, Hulanicka M, Grzelkowska-Kowalczyk K. Interleukin-6 affects pacsin3, ephrinA4 expression and cytoskeletal proteins in differentiating primary skeletal myoblasts through transcriptional and post-transcriptional mechanisms. Cell Tissue Res 2019; 380:155-172. [PMID: 31820147 DOI: 10.1007/s00441-019-03133-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 10/29/2019] [Indexed: 12/18/2022]
Abstract
Interleukin (IL)-6 is a proinflammatory cytokine released in injured and contracting skeletal muscles. In this study, we examined cellular expression of proteins associated with cytoskeleton organization and cell migration, chosen on the basis of microRNA profiling, in rat primary skeletal muscle cells (RSkMC) treated with IL-6 (1 ng/ml) for 11 days. MiRNA microarray analysis and qRT-PCR revealed increased expression of miR-154-3p and miR-338-3p in muscle cells treated with IL-6. Pacsin3 was downregulated post-transcriptionally by IL-6, but not by IGF-I. Ephrin4A protein was increased both in IL-6- and IGF-I-treated myocytes. IL-6, but not IGF-I, stimulated migratory ability of RSkMC, examined in wound healing assay. Alpha-actinin protein was slightly augmented in RSKMC treated with IL-6, similarly to IGF-I. IL-6, but not IGF-I, upregulated desmin in differentiating RSkMC. IL-6 supplementation caused accumulation of alpha-actinin and desmin in near-nuclear area of muscle cells, which was manifested by increased ratio: mean near-nuclear fluorescence/mean peripheral cytoplasm fluorescence of these proteins. We concluded that IL-6, a known proinflammatory cytokine and a physical activity-associated myokine, acting during differentiation of primary skeletal muscle cells, alters expression of nonmuscle-specific miRNAs. This cytokine causes differential effects on pacsin-3 and ephrinA4, through post-transcriptional inhibition and stimulation, respectively. IL-6-exerted modifications of cytoskeletal proteins in muscle cells include both transcriptional (desmin and dynein heavy chain 5) and post-transcriptional activation (alpha-actinin). Moreover, IL-6 augments near-nuclear distribution of cytoskeletal proteins, alpha-actinin and desmin and promotes migration of myocytes. Such effects suggest that IL-6 plays a role during skeletal muscle regeneration, acting through mechanisms independent of regulation of myogenic program.
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Affiliation(s)
- Marta Milewska
- Institute of Veterinary Medicine, Department of Physiological Sciences, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Tomasz Domoradzki
- Institute of Veterinary Medicine, Department of Physiological Sciences, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Alicja Majewska
- Institute of Veterinary Medicine, Department of Physiological Sciences, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Maciej Błaszczyk
- Institute of Veterinary Medicine, Department of Physiological Sciences, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Małgorzata Gajewska
- Institute of Veterinary Medicine, Department of Physiological Sciences, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Magdalena Hulanicka
- Institute of Veterinary Medicine, Department of Physiological Sciences, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Katarzyna Grzelkowska-Kowalczyk
- Institute of Veterinary Medicine, Department of Physiological Sciences, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776, Warsaw, Poland.
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Hwang PS, Willoughby DS. Mechanisms Behind Blood Flow-Restricted Training and its Effect Toward Muscle Growth. J Strength Cond Res 2019; 33 Suppl 1:S167-S179. [PMID: 30011262 DOI: 10.1519/jsc.0000000000002384] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hwang, P and Willoughby, DS. Mechanisms behind blood flow-restricted training and its effect toward muscle growth. J Strength Cond Res 33(7S): S167-S179, 2019-It is widely established throughout the literature that skeletal muscle can induce hypertrophic adaptations after progressive overload of moderate-to-high-intensity resistance training. However, there has recently been a growing body of research that shows that the combination of blood flow-restricted (BFR) training with low-intensity resistance exercise can induce similar gains in muscular strength and hypertrophic adaptations. The implementation of external pressure cuffs over the most proximal position of the limb extremities with the occlusion of venous outflow of blood distal to the occlusion site defines the BFR training protocol. There are various mechanisms through which BFR training may cause the stimulations for skeletal muscle hypertrophy and increases in strength. These may include increases in hormonal concentrations, increases within the components of the intracellular signaling pathways for muscle protein synthesis such as the mTOR pathway, increases within biomarkers denoting satellite cell activity and apparent patterns in fiber type recruitment. There have also been scientific findings demonstrating hypertrophic effects within both BFR limbs and non-BFR muscles during BFR training programs. The purpose behind this critical review will be to provide a comprehensive discussion on relevant literature that can help elucidate the potential underlying mechanisms leading to hypertrophic adaptations after BFR training programs. This review will also explicate the various findings within the literature that focalizes on both BFR limb and non-BFR muscle hypertrophy after bouts of BFR training. Furthermore, this critical review will also address the various needs for future research in the many components underlying the novel modality of BFR training.
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Affiliation(s)
- Paul S Hwang
- Department of Health, Human Performance, and Recreation, Exercise and Biochemical Nutrition Laboratory, Baylor University, Waco, Texas
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Nguyen JH, Chung JD, Lynch GS, Ryall JG. The Microenvironment Is a Critical Regulator of Muscle Stem Cell Activation and Proliferation. Front Cell Dev Biol 2019; 7:254. [PMID: 31737625 PMCID: PMC6828616 DOI: 10.3389/fcell.2019.00254] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 10/14/2019] [Indexed: 12/21/2022] Open
Abstract
Skeletal muscle has a remarkable capacity to regenerate following injury, a property conferred by a resident population of muscle stem cells (MuSCs). In response to injury, MuSCs must double their cellular content to divide, a process requiring significant new biomass in the form of nucleotides, phospholipids, and amino acids. This new biomass is derived from a series of intracellular metabolic cycles and alternative routing of carbon. In this review, we examine the link between metabolism and skeletal muscle regeneration with particular emphasis on the role of the cellular microenvironment in supporting the production of new biomass and MuSC proliferation.
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Affiliation(s)
- John H Nguyen
- Department of Physiology, Centre for Muscle Research, The University of Melbourne, Melbourne, VIC, Australia
| | - Jin D Chung
- Department of Physiology, Centre for Muscle Research, The University of Melbourne, Melbourne, VIC, Australia
| | - Gordon S Lynch
- Department of Physiology, Centre for Muscle Research, The University of Melbourne, Melbourne, VIC, Australia
| | - James G Ryall
- Department of Physiology, Centre for Muscle Research, The University of Melbourne, Melbourne, VIC, Australia
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Hu J, Shi D, Ding M, Huang T, Gu R, Xiao J, Xian CJ, Dong J, Wang L, Liao H. Calmodulin-dependent signalling pathways are activated and mediate the acute inflammatory response of injured skeletal muscle. J Physiol 2019; 597:5161-5177. [PMID: 31506936 DOI: 10.1113/jp278478] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 09/09/2019] [Indexed: 12/17/2022] Open
Abstract
KEY POINTS There is a close relationship between skeletal muscle physiology and Ca2+ /calmodulin (CaM) signalling. Despite the effects of Ca2+ /CaM signalling on immune and inflammatory responses having been extensively explored, few studies have investigated the role of CaM pathway activation on the post-injury muscle inflammatory response. In this study, we investigated the role of CaM-dependent signalling in muscle inflammation in cardiotoxin induced myoinjuries in mice. The Ca2+ /calmodulin-dependent protein kinase II (CaMII), Ca2+ /calmodulin-dependent protein kinase IV (CaMKIV), and nuclear factor of activated T cells (NFAT) pathways are likely to be simultaneously activated in muscle cells and in infiltrating lymphocytes and to regulate the immune behaviours of myofibres in an inflammatory environment, and these pathways ultimately affect the outcome of muscle inflammation. ABSTRACT Calcium/calmodulin (Ca2+ /CaM) signalling is essential for immune and inflammatory responses in tissues. However, it is unclear if Ca2+ /CaM signalling interferes with muscle inflammation. Here we investigated the roles of CaM-dependent signalling in muscle inflammation in mice that had acute myoinjuries in the tibialis anterior muscle induced by intramuscular cardiotoxin (CTX) injections and received intraperitoneal injections of either the CaM inhibitor calmidazolium chloride (CCL) or CaM agonist calcium-like peptide 1 (CALP1). Multiple inflammatory parameters, including muscle autoantigens and toll-like receptors, mononuclear cell infiltration, cytokines and chemokines associated with peripheral muscle inflammation, were examined after the injury and treatment. CALP1 treatment enhanced intramuscular infiltration of monocytes/macrophages into the damaged tibialis anterior muscle and up-regulated mRNA and protein levels of muscle autoantigens (Mi-2, HARS and Ku70) and Toll-like receptor 3 (TLR3), and mRNA levels of tumor necrosis factor α (TNF-α), interleukin-6 (IL-6), Monocyte chemoattractant protein-1 (MCP1), Monocyte chemoattractant protein-3 (MCP3) and Macrophage inflammatory protein-1(MIP-1α) in damaged muscle. In contrast, CCL treatment decreased the intramuscular cell infiltration and mRNA levels of the inflammatory mediators. After CALP1 treatment, a substantial up-regulation in Ca2+ /calmodulin-dependent protein kinase II (CaMKII), Ca2+ /calmodulin-dependent protein kinase IV (CaMKIV) and nuclear factor of activated T cells (NFAT) activity was detected in CD45+ cells isolated from the damaged muscle. More pro-inflammatory F4/80+ Ly-6C+ cells were detected in CD45-gated cells after CALP1 treatment than in those after CCL treatment or no treatment. Consistently, in interferon-γ-stimulated cultured myoblasts and myotubes, CALP1 treatment up-regulated the activities of CaMKII, CaMKIV and NFAT, and levels of class I/II major histocompatibility complexes (MHC-I/II) and TLR3. Our findings demonstrated that CaM-dependent signalling pathways mediate the injury-induced acute muscle inflammatory response.
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Affiliation(s)
- Jijie Hu
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Dandan Shi
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.,Hubei Key Laboratory of Embryonic Stem Cell Research, Department of Anatomy, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China
| | - Maochao Ding
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.,Department of Human Anatomy, Tissue Repair and Regenerative Medicine Research Center, Wenzhou Medical University, Wenzhou, 325035, China
| | - Tao Huang
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Ruicai Gu
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Jiangwei Xiao
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Cory J Xian
- School of Pharmacy and Medical Sciences, and UniSA Cancer Research Institute, University of South Australia, Adelaide, Australia
| | - Jianghui Dong
- School of Pharmacy and Medical Sciences, and UniSA Cancer Research Institute, University of South Australia, Adelaide, Australia
| | - Liping Wang
- School of Pharmacy and Medical Sciences, and UniSA Cancer Research Institute, University of South Australia, Adelaide, Australia
| | - Hua Liao
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
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40
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Jin J, Bakker AD, Wu G, Klein-Nulend J, Jaspers RT. Physicochemical Niche Conditions and Mechanosensing by Osteocytes and Myocytes. Curr Osteoporos Rep 2019; 17:235-249. [PMID: 31428977 PMCID: PMC6817749 DOI: 10.1007/s11914-019-00522-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF REVIEW Bone and muscle mass increase in response to mechanical loading and biochemical cues. Bone-forming osteoblasts differentiate into early osteocytes which ultimately mature into late osteocytes encapsulated in stiff calcified matrix. Increased muscle mass originates from muscle stem cells (MuSCs) enclosed between their plasma membrane and basal lamina. Stem cell fate and function are strongly determined by physical and chemical properties of their microenvironment, i.e., the cell niche. RECENT FINDINGS The cellular niche is a three-dimensional structure consisting of extracellular matrix components, signaling molecules, and/or other cells. Via mechanical interaction with their niche, osteocytes and MuSCs are subjected to mechanical loads causing deformations of membrane, cytoskeleton, and/or nucleus, which elicit biochemical responses and secretion of signaling molecules into the niche. The latter may modulate metabolism, morphology, and mechanosensitivity of the secreting cells, or signal to neighboring cells and cells at a distance. Little is known about how mechanical loading of bone and muscle tissue affects osteocytes and MuSCs within their niches. This review provides an overview of physicochemical niche conditions of (early) osteocytes and MuSCs and how these are sensed and determine cell fate and function. Moreover, we discuss how state-of-the-art imaging techniques may enhance our understanding of these conditions and mechanisms.
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Affiliation(s)
- Jianfeng Jin
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Astrid D Bakker
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Gang Wu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Jenneke Klein-Nulend
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Richard T Jaspers
- Laboratory for Myology, Faculty of Behavioral and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands.
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41
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Keller AV, Hainline C, Rees K, Krupp S, Prince D, Wood BD, Shum-Siu A, Burke DA, Petruska JC, Magnuson DSK. Nociceptor-dependent locomotor dysfunction after clinically-modeled hindlimb muscle stretching in adult rats with spinal cord injury. Exp Neurol 2019; 318:267-276. [PMID: 30880143 DOI: 10.1016/j.expneurol.2019.03.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/06/2019] [Accepted: 03/13/2019] [Indexed: 01/10/2023]
Abstract
In the course of investigating how common clinical treatments and adaptive technologies affect recovery after spinal cord injury (SCI), we discovered that a clinically-modeled hindlimb stretching protocol dramatically, but transiently, reduces locomotor function. Nociceptive sensory input is capable of altering motor output at the spinal level, and nociceptive neurons are sensitized after SCI. Here we tested the hypotheses that stretch-induced locomotor deficits are dependent on nociceptive afferents by depleting TRPV1+ sensory afferents using capsaicin injections in neonatal rats. Following maturation, animals received 25g-cm contusive SCI at T10. After plateau of locomotor recovery at 6 weeks, daily stretching was performed for 3 weeks, followed by 2 weeks without stretch, and again for two additional weeks. Animals were sacrificed 2 h after the last stretching session for histological assessments. Consistent with previous findings, stretch-induced drops in locomotor function were observed in nociceptor-intact animals but were nearly absent in nociceptor-depleted animals. These functional changes were accompanied by corresponding increases in the number of c-Fos+ nuclei throughout the lumbar enlargement. As expected, nociceptor-depleted animals had very little CGRP+ axonal innervation of the dorsal horn. Nociceptor-intact stretched animals had significantly higher levels of CGRP+ as compared to non-stretched SCI rats, suggesting that stretching promoted intraspinal CGRP+ sprouting. These results indicate that stretch-induced locomotor dysfunction in animals with incomplete SCI involves C-fibers, adding a negative post-SCI role to their adaptive roles (e.g., bladder control), and suggesting that the clinical use of muscle stretching to combat contractures and spasticity may be unintentionally detrimental to locomotor function.
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Affiliation(s)
- Anastasia V Keller
- Department of Physiology, University of Louisville, School of Medicine, HSC A 1115, 500 South Preston Street, Louisville, KY 40292, USA
| | - Casey Hainline
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, University of Louisville, 220 Abraham Flexner Way, Louisville, KY 40202, USA
| | - Kathleen Rees
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, University of Louisville, 220 Abraham Flexner Way, Louisville, KY 40202, USA
| | - Sarah Krupp
- Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, 511 South Floyd, Room 111, Louisville, KY 40202, USA
| | - Daniella Prince
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, University of Louisville, 220 Abraham Flexner Way, Louisville, KY 40202, USA
| | - Brittney D Wood
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, University of Louisville, 220 Abraham Flexner Way, Louisville, KY 40202, USA
| | - Alice Shum-Siu
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, University of Louisville, 220 Abraham Flexner Way, Louisville, KY 40202, USA
| | - Darlene A Burke
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, University of Louisville, 220 Abraham Flexner Way, Louisville, KY 40202, USA
| | - Jeffrey C Petruska
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, University of Louisville, 220 Abraham Flexner Way, Louisville, KY 40202, USA; Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, 511 South Floyd, Room 111, Louisville, KY 40202, USA
| | - David S K Magnuson
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, University of Louisville, 220 Abraham Flexner Way, Louisville, KY 40202, USA; Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, 511 South Floyd, Room 111, Louisville, KY 40202, USA; Department of Physiology, University of Louisville, School of Medicine, HSC A 1115, 500 South Preston Street, Louisville, KY 40292, USA.
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Huang T, Xiao J, Wang S, Liao Z, Huang T, Gu R, Li J, Wu G, Liao H. The thickness of poly-phenoxyethyl methacrylate brush interferes with cellular behavior and function of myofibers. J Biomed Mater Res A 2019; 107:1264-1272. [PMID: 30724032 DOI: 10.1002/jbm.a.36636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 12/19/2018] [Accepted: 12/30/2018] [Indexed: 11/07/2022]
Abstract
Introducing or grafting molecules onto biomaterial surfaces to regulate muscle cell destination via biophysical cues is one of the important steps for biomaterial design in muscle tissue engineering. Therefore, it is important to understand the interaction between myoblasts and myofibers with substrates modified by biomimetic layer with different thicknesses. In this study, we used a surface-induced atom transfer radical polymerization method to synthetize and graft poly-phenoxyethyl methacrylate (PHEMA) brushes having different lengths on the glass substrates. C2C12 myoblasts were seeded on the PHEMA brushes and differentiated using horse serum, for analyzing the sensibility of muscle cells to feel environment changing, and further investigating whether the depths of grafting layer on the biomaterial surface are important factors in regulating muscle cell behaviors. Our results demonstrated that on the thicker PHEMA brushes surface (200 and 450 nm), C2C12 myoblasts showed a better survival and proliferation and were favorable for cell fusion and myotube formation. Furthermore, myofibers survived on the thicker brushes were more functional and upregulated cytoskeleton proteins (tubulin, vimentin, and vinculin) and FAK levels, and enhanced the expression levels for mechanical stress molecules (HGF, NOS-1, and c-Met). These results suggest that grafting thickness of PHEMA layer on the substrate led to the myoblasts/myofiber behavior change, which would be valuable for the design and preparation of the modified layer on muscle tissue engineering scaffolds. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1264-1272, 2019.
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Affiliation(s)
- Tao Huang
- Department of Neurosurgery, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, 510120, China
| | - Jiangwei Xiao
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Shuhao Wang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Zhaohong Liao
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Tao Huang
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Ruicai Gu
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Junhua Li
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Gang Wu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Hua Liao
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
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Kim S, Zhang X, O'Buckley SC, Cooter M, Park JJ, Nackley AG. Acupuncture Resolves Persistent Pain and Neuroinflammation in a Mouse Model of Chronic Overlapping Pain Conditions. THE JOURNAL OF PAIN 2018; 19:1384.e1-1384.e14. [PMID: 29981376 PMCID: PMC6289709 DOI: 10.1016/j.jpain.2018.05.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 05/24/2018] [Accepted: 05/28/2018] [Indexed: 02/07/2023]
Abstract
Patients with chronic overlapping pain conditions have decreased levels of catechol-O-methyltransferase (COMT), an enzyme that metabolizes catecholamines. Consistent with clinical syndromes, we previously demonstrated that COMT inhibition in rodents produces persistent pain and heightened immune responses. Here, we sought to determine the efficacy of manual acupuncture in resolving persistent pain and neuroinflammation in the classic inbred C57BL/6 strain and the rapid-wound healing MRL/MpJ strain. Mice received subcutaneous osmotic minipumps to deliver the COMT inhibitor OR486 or vehicle for 13 days. On day 7 after pump implantation, acupuncture was performed at the Zusanli (ST36) point or a non-acupoint for 6 consecutive days. Behavioral responses to mechanical stimuli were measured throughout the experiment. Immunohistochemical analysis of spinal phosphorylated p38 mitogen-activated protein kinase, a marker of inflammation, and glial fibrillary acidic protein, a marker of astrogliosis, was performed on day 13. Results demonstrated that ST36, but not sham, acupuncture resolved mechanical hypersensitivity and reduced OR486-dependent increases in phosphorylated p38 and glial fibrillary acidic protein in both strains. The magnitude of the analgesic response was greater in MRL/MpJ mice. These findings indicate acupuncture as an effective treatment for persistent pain linked to abnormalities in catecholamine signaling and, furthermore, that analgesic efficacy may be influenced by genetic differences. PERSPECTIVE: Chronic overlapping pain conditions remain ineffectively managed by conventional pharmacotherapies. Here, we demonstrate that acupuncture alleviates persistent pain and neuroinflammation linked to heightened catecholaminergic tone. Mice with superior healing capacity exhibit greater analgesic efficacy. Findings indicate acupuncture as an effective treatment for chronic overlapping pain conditions and provide insight into treatment response variability.
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Affiliation(s)
- Seungtae Kim
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University School of Medicine, Durham, North Carolina; Division of Meridian and Structural Medicine, School of Korean Medicine, Pusan National University, Yangsan, Korea
| | - Xin Zhang
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University School of Medicine, Durham, North Carolina; Pain Management Center, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Sandra C O'Buckley
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University School of Medicine, Durham, North Carolina
| | - Mary Cooter
- Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina
| | - Jongbae J Park
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University School of Medicine, Durham, North Carolina
| | - Andrea G Nackley
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University School of Medicine, Durham, North Carolina.
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Rudar M, Fiorotto ML, Davis TA. Regulation of Muscle Growth in Early Postnatal Life in a Swine Model. Annu Rev Anim Biosci 2018; 7:309-335. [PMID: 30388025 DOI: 10.1146/annurev-animal-020518-115130] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Skeletal muscle growth during the early postnatal period is rapid in the pig and dependent on the capacity of muscle to respond to anabolic and catabolic stimuli. Muscle mass is driven by the balance between protein synthesis and degradation. Among these processes, muscle protein synthesis in the piglet is exceptionally sensitive to the feeding-induced postprandial changes in insulin and amino acids, whereas muscle protein degradation is affected only during specific catabolic states. The developmental decline in the response of muscle to feeding is associated with changes in the signaling pathways located upstream and downstream of the mechanistic target of rapamycin protein complex. Additionally, muscle growth is supported by an accretion of nuclei derived from satellite cells. Activated satellite cells undergo proliferation, differentiation, and fusion with adjacent growing muscle fibers. Enhancing early muscle growth through modifying protein synthesis, degradation, and satellite cell activity is key to maximizing performance, productivity, and lifelong pig health.
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Affiliation(s)
- Marko Rudar
- USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030, USA; , ,
| | - Marta L Fiorotto
- USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030, USA; , ,
| | - Teresa A Davis
- USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030, USA; , ,
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Wackerhage H, Schoenfeld BJ, Hamilton DL, Lehti M, Hulmi JJ. Stimuli and sensors that initiate skeletal muscle hypertrophy following resistance exercise. J Appl Physiol (1985) 2018; 126:30-43. [PMID: 30335577 DOI: 10.1152/japplphysiol.00685.2018] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
One of the most striking adaptations to exercise is the skeletal muscle hypertrophy that occurs in response to resistance exercise. A large body of work shows that a mammalian target of rapamycin complex 1 (mTORC1)-mediated increase of muscle protein synthesis is the key, but not sole, mechanism by which resistance exercise causes muscle hypertrophy. While much of the hypertrophy signaling cascade has been identified, the initiating, resistance exercise-induced and hypertrophy-stimulating stimuli have remained elusive. For the purpose of this review, we define an initiating, resistance exercise-induced and hypertrophy-stimulating signal as "hypertrophy stimulus," and the sensor of such a signal as "hypertrophy sensor." In this review we discuss our current knowledge of specific mechanical stimuli, damage/injury-associated and metabolic stress-associated triggers, as potential hypertrophy stimuli. Mechanical signals are the prime hypertrophy stimuli candidates, and a filamin-C-BAG3-dependent regulation of mTORC1, Hippo, and autophagy signaling is a plausible albeit still incompletely characterized hypertrophy sensor. Other candidate mechanosensing mechanisms are nuclear deformation-initiated signaling or several mechanisms related to costameres, which are the functional equivalents of focal adhesions in other cells. While exercise-induced muscle damage is probably not essential for hypertrophy, it is still unclear whether and how such muscle damage could augment a hypertrophic response. Interventions that combine blood flow restriction and especially low load resistance exercise suggest that resistance exercise-regulated metabolites could be hypertrophy stimuli, but this is based on indirect evidence and metabolite candidates are poorly characterized.
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Affiliation(s)
- Henning Wackerhage
- Department of Sport and Exercise Sciences, Technical University of Munich , Munich , Germany
| | | | - D Lee Hamilton
- Faculty of Health, School of Exercise and Nutrition Sciences, Deakin University , Victoria , Australia
| | - Maarit Lehti
- LIKES Research Centre for Physical Activity and Health , Jyväskylä , Finland
| | - Juha J Hulmi
- Neuromuscular Research Center, Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä , Jyväskylä , Finland
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Unraveling the Molecular Determinants of Manual Therapy: An Approach to Integrative Therapeutics for the Treatment of Fibromyalgia and Chronic Fatigue Syndrome/Myalgic Encephalomyelitis. Int J Mol Sci 2018; 19:ijms19092673. [PMID: 30205597 PMCID: PMC6164741 DOI: 10.3390/ijms19092673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/04/2018] [Accepted: 09/07/2018] [Indexed: 12/29/2022] Open
Abstract
Application of protocols without parameter standardization and appropriate controls has led manual therapy (MT) and other physiotherapy-based approaches to controversial outcomes. Thus, there is an urgency to carefully define standard protocols that elevate physiotherapy treatments to rigorous scientific demands. One way in which this can be achieved is by studying gene expression and physiological changes that associate to particular, parameter-controlled, treatments in animal models, and translating this knowledge to properly designed, objective, quantitatively-monitored clinical trials (CTs). Here, we propose a molecular physiotherapy approach (MPTA) requiring multidisciplinary teams, to uncover the scientific reasons behind the numerous reports that historically attribute health benefits to MT-treatments. The review focuses on the identification of MT-induced physiological and molecular responses that could be used for the treatment of fibromyalgia (FM) and chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME). The systemic effects associated to mechanical-load responses are considered of particular relevance, as they suggest that defined, low-pain anatomic areas can be selected for MT treatment and yet yield overall benefits, an aspect that might result in it being essential to treat FM. Additionally, MT can provide muscle conditioning to sedentary patients without demanding strenuous physical effort, which is particularly detrimental for CFS/ME patients, placing MT as a real option for integrative medicine programs to improve FM and CFS/ME.
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Maleiner B, Tomasch J, Heher P, Spadiut O, Rünzler D, Fuchs C. The Importance of Biophysical and Biochemical Stimuli in Dynamic Skeletal Muscle Models. Front Physiol 2018; 9:1130. [PMID: 30246791 PMCID: PMC6113794 DOI: 10.3389/fphys.2018.01130] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 07/30/2018] [Indexed: 12/31/2022] Open
Abstract
Classical approaches to engineer skeletal muscle tissue based on current regenerative and surgical procedures still do not meet the desired outcome for patient applications. Besides the evident need to create functional skeletal muscle tissue for the repair of volumetric muscle defects, there is also growing demand for platforms to study muscle-related diseases, such as muscular dystrophies or sarcopenia. Currently, numerous studies exist that have employed a variety of biomaterials, cell types and strategies for maturation of skeletal muscle tissue in 2D and 3D environments. However, researchers are just at the beginning of understanding the impact of different culture settings and their biochemical (growth factors and chemical changes) and biophysical cues (mechanical properties) on myogenesis. With this review we intend to emphasize the need for new in vitro skeletal muscle (disease) models to better recapitulate important structural and functional aspects of muscle development. We highlight the importance of choosing appropriate system components, e.g., cell and biomaterial type, structural and mechanical matrix properties or culture format, and how understanding their interplay will enable researchers to create optimized platforms to investigate myogenesis in healthy and diseased tissue. Thus, we aim to deliver guidelines for experimental designs to allow estimation of the potential influence of the selected skeletal muscle tissue engineering setup on the myogenic outcome prior to their implementation. Moreover, we offer a workflow to facilitate identifying and selecting different analytical tools to demonstrate the successful creation of functional skeletal muscle tissue. Ultimately, a refinement of existing strategies will lead to further progression in understanding important aspects of muscle diseases, muscle aging and muscle regeneration to improve quality of life of patients and enable the establishment of new treatment options.
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Affiliation(s)
- Babette Maleiner
- Department of Biochemical Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Janine Tomasch
- Department of Biochemical Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Philipp Heher
- The Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology/AUVA Research Center, Vienna, Austria.,Trauma Care Consult GmbH, Vienna, Austria
| | - Oliver Spadiut
- Institute of Chemical Engineering, Vienna University of Technology, Vienna, Austria
| | - Dominik Rünzler
- Department of Biochemical Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Christiane Fuchs
- Department of Biochemical Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria.,The Austrian Cluster for Tissue Regeneration, Vienna, Austria
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Zarkoob H, Chinnathambi S, Selby JC, Sander EA. Substrate deformations induce directed keratinocyte migration. J R Soc Interface 2018; 15:20180133. [PMID: 29899159 PMCID: PMC6030620 DOI: 10.1098/rsif.2018.0133] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 05/18/2018] [Indexed: 12/18/2022] Open
Abstract
Cell migration is an essential part of many (patho)physiological processes, including keratinocyte re-epithelialization of healing wounds. Physical forces and mechanical cues from the wound bed (in addition to biochemical signals) may also play an important role in the healing process. Previously, we explored this possibility and found that polyacrylamide (PA) gel stiffness affected human keratinocyte behaviour and that mechanical deformations in soft (approx. 1.2 kPa) PA gels produced by neighbouring cells appeared to influence the process of de novo epithelial sheet formation. To clearly demonstrate that keratinocytes do respond to such deformations, we conducted a series of experiments where we observed the response of single keratinocytes to a prescribed local substrate deformation that mimicked a neighbouring cell or evolving multicellular aggregate via a servo-controlled microneedle. We also examined the effect of adding either Y27632 or blebbistatin on cell response. Our results indicate that keratinocytes do sense and respond to mechanical signals comparable to those that originate from substrate deformations imposed by neighbouring cells, a finding that could have important implications for the process of keratinocyte re-epithelialization that takes place during wound healing. Furthermore, the Rho/ROCK pathway and the engagement of NM II are both essential to substrate deformation-directed keratinocyte migration.
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Affiliation(s)
- Hoda Zarkoob
- Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa City, IA, USA
| | - Sathivel Chinnathambi
- Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa City, IA, USA
| | - John C Selby
- Department of Dermatology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Edward A Sander
- Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa City, IA, USA
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Boers HE, Haroon M, Le Grand F, Bakker AD, Klein‐Nulend J, Jaspers RT. ---Mechanosensitivity of aged muscle stem cells. J Orthop Res 2018; 36:632-641. [PMID: 29094772 PMCID: PMC5888196 DOI: 10.1002/jor.23797] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 10/13/2017] [Indexed: 02/04/2023]
Abstract
During aging, skeletal muscle tissue progressively declines in mass, strength, and regenerative capacity. Decreased muscle stem cell (MuSC) number and impaired function might underlie the aging-related muscle wasting and impaired regenerative capacity. As yet, the search for factors that regulate MuSC fate and function has revealed several biochemical factors within the MuSC niche that may be responsible for the decline in MuSC regenerative capacity. This decline cannot be explained by environmental factors solely, as the MuSC potential to regenerate muscle tissue is not reversed by changing the biochemical MuSC niche composition. Here we discuss the likeliness that during physical exercise, MuSCs within their niche are subjected to mechanical loads, in particular pressure and shear stress, as well as associated deformations. We postulate that these physical cues are involved in the activation and differentiation of MuSCs as these cells contain several transmembrane sensor proteins that have been shown to be mechanosensitive in other cell types, that is, endothelial cells and osteoprogenitors. We will specifically address age-related changes in mechanosensing in MuSCs and their niche. Insight in the physical cues applied to the MuSCs in vivo, and how these cues affect MuSC fate and function, helps to develop new therapeutic interventions to counterbalance age-related muscle loss. This requires an approach combining two- and three-dimensional live cell imaging of MuSCs within contracting muscle tissue, mathematical finite element modeling, and cell biology. © 2017 The Authors. Journal of Orthopaedic Research® Published by Wiley Periodicals, Inc. on behalf of the Orthopaedic Research Society. J Orthop Res 36:632-641, 2018.
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Affiliation(s)
- Heleen E. Boers
- Laboratory for MyologyFaculty of Behavioural and Movement SciencesVrije Universiteit AmsterdamAmsterdam Movement SciencesDe Boelelaan 11081081 HZ AmsterdamThe Netherlands
| | - Mohammad Haroon
- Laboratory for MyologyFaculty of Behavioural and Movement SciencesVrije Universiteit AmsterdamAmsterdam Movement SciencesDe Boelelaan 11081081 HZ AmsterdamThe Netherlands
| | - Fabien Le Grand
- Sorbonne UniversitésUPMC Univ Paris 06INSERM UMRS974CNRS FRE3617Center for Research in Myology75013 ParisFrance
| | - Astrid D. Bakker
- Department of Oral Cell BiologyAcademic Centre for Dentistry AmsterdamUniversity of Amsterdam and Vrije Universiteit AmsterdamAmsterdam Movement SciencesAmsterdamThe Netherlands
| | - Jenneke Klein‐Nulend
- Department of Oral Cell BiologyAcademic Centre for Dentistry AmsterdamUniversity of Amsterdam and Vrije Universiteit AmsterdamAmsterdam Movement SciencesAmsterdamThe Netherlands
| | - Richard T. Jaspers
- Laboratory for MyologyFaculty of Behavioural and Movement SciencesVrije Universiteit AmsterdamAmsterdam Movement SciencesDe Boelelaan 11081081 HZ AmsterdamThe Netherlands
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50
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Zeng Y, Wu J, He X, Li L, Liu X, Liu X. Mechanical microenvironment regulation of age-related diseases involving degeneration of human skeletal and cardiovascular systems. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2017; 148:54-59. [PMID: 28958683 DOI: 10.1016/j.pbiomolbio.2017.09.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 08/24/2017] [Accepted: 09/25/2017] [Indexed: 02/05/2023]
Abstract
Age-related diseases involving degeneration of human skeletal and cardiovascular systems are now critical problems worldwide. The current review focuses on a common pathophysiological association between primary osteoporosis and vascular calcification, and reviews the mechanical response of bone cells and vascular cells to mechanical stress, as well as the coordination mechanism for intercellular signaling. With aging, calcium is lost from bones but deposited in the cardiovascular system. Bone metabolism-related molecules, such as alkaline phosphatase, matrix Gla protein, osteocalcin, osteopontin, and collagen type I; inflammatory cytokines, such as interleukin-1, -6, and tumor necrosis factor; and lipid metabolism related molecules, such as oxidized low density lipoprotein; mediate signaling in primary osteoporosis and vascular calcification. The mechanical microenvironment is a common pathophysiological basis for primary osteoporosis and vascular calcification. Mobilization of calcium from bone to vessel determines the regression rate, which could be controlled using a mechanical microenvironment. We highlight several issues: (1) linked features between primary osteoporosis and vascular calcification, and detailed changes of the mechanical microenvironment in degenerative bone or blood vessels, (2) signaling coordination mechanism between bone and vascular wall cells, and (3) calcium translocation mechanism. The degree to which these issues can be solved will help develop prevention and treatment strategies for age-related regression.
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Affiliation(s)
- Ye Zeng
- Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China.
| | - Jiang Wu
- Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xueling He
- Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China; Laboratory Animal Center of Sichuan University, Chengdu 610041, China
| | - Liang Li
- Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China.
| | - Xiaojing Liu
- Laboratory of Cardiovascular Diseases, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiaoheng Liu
- Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610041, China.
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