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Rassier DE, Månsson A. Mechanisms of myosin II force generation. Insights from novel experimental techniques and approaches. Physiol Rev 2024. [PMID: 38451233 DOI: 10.1152/physrev.00014.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 02/29/2024] [Indexed: 03/08/2024] Open
Abstract
Myosin II is a molecular motor that converts chemical energy derived from ATP hydrolysis into mechanical work. Myosin II isoforms are responsible for muscle contraction and a range of cell functions relying on the development of force and motion. When the motor attaches to actin, ATP is hydrolyzed, and inorganic phosphate (Pi) and ADP are released from its active site. These reactions are coordinated with changes in the structure of myosin, promoting the so called "power-stroke" that causes sliding of actin filaments. The general features of the myosin-actin interactions are well accepted, but there are critical issues that remain poorly understood, mostly due to technological limitations. In recent years, there has been a significant advance in structural, biochemical, and mechanical methods that have advanced the field considerably. New modeling approaches have also allowed researchers to understand actomyosin interactions at different levels of analysis. This paper reviews recent studies looking into the interaction between myosin II and actin filaments, which leads to the power stroke and force generation. It reviews studies conducted with single myosin molecules, myosins working in filaments, muscle sarcomeres, myofibrils and fibers. It also reviews the mathematical models that have been used to understand the mechanics of myosin II, in approaches focusing on single molecules to ensembles. Finally, it includes brief sections on translational aspects, and how changes in the myosin motor by mutations and/or posttranslational modifications may cause detrimental effects in diseases and aging, among other conditions, and how myosin II has become an emerging drug target.
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Affiliation(s)
- Dilson E Rassier
- Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, Canada
| | - Alf Månsson
- Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
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2
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de Winter JM, Molenaar JP, Yuen M, van der Pijl R, Shen S, Conijn S, van de Locht M, Willigenburg M, Bogaards SJ, van Kleef ES, Lassche S, Persson M, Rassier DE, Sztal TE, Ruparelia AA, Oorschot V, Ramm G, Hall TE, Xiong Z, Johnson CN, Li F, Kiss B, Lozano-Vidal N, Boon RA, Marabita M, Nogara L, Blaauw B, Rodenburg RJ, Küsters B, Doorduin J, Beggs AH, Granzier H, Campbell K, Ma W, Irving T, Malfatti E, Romero NB, Bryson-Richardson RJ, van Engelen BG, Voermans NC, Ottenheijm CA. KBTBD13 is an actin-binding protein that modulates muscle kinetics. J Clin Invest 2024; 134:e179111. [PMID: 38299595 PMCID: PMC10836800 DOI: 10.1172/jci179111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024] Open
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3
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Elkrief D, Matusovsky O, Cheng YS, Rassier DE. From amino-acid to disease: the effects of oxidation on actin-myosin interactions in muscle. J Muscle Res Cell Motil 2023; 44:225-254. [PMID: 37805961 DOI: 10.1007/s10974-023-09658-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/15/2023] [Indexed: 10/10/2023]
Abstract
Actin-myosin interactions form the basis of the force-producing contraction cycle within the sarcomere, serving as the primary mechanism for muscle contraction. Post-translational modifications, such as oxidation, have a considerable impact on the mechanics of these interactions. Considering their widespread occurrence, the explicit contributions of these modifications to muscle function remain an active field of research. In this review, we aim to provide a comprehensive overview of the basic mechanics of the actin-myosin complex and elucidate the extent to which oxidation influences the contractile cycle and various mechanical characteristics of this complex at the single-molecule, myofibrillar and whole-muscle levels. We place particular focus on amino acids shown to be vulnerable to oxidation in actin, myosin, and some of their binding partners. Additionally, we highlight the differences between in vitro environments, where oxidation is controlled and limited to actin and myosin and myofibrillar or whole muscle environments, to foster a better understanding of oxidative modification in muscle. Thus, this review seeks to encompass a broad range of studies, aiming to lay out the multi layered effects of oxidation in in vitro and in vivo environments, with brief mention of clinical muscular disorders associated with oxidative stress.
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Affiliation(s)
- Daren Elkrief
- Department of Physiology, McGill University, Montreal, QC, Canada
| | - Oleg Matusovsky
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC, Canada
| | - Yu-Shu Cheng
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC, Canada
| | - Dilson E Rassier
- Department of Physiology, McGill University, Montreal, QC, Canada.
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC, Canada.
- Simon Fraser University, Burnaby, BC, Canada.
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4
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Månsson A, Ušaj M, Moretto L, Matusovsky O, Velayuthan LP, Friedman R, Rassier DE. New paradigms in actomyosin energy transduction: Critical evaluation of non-traditional models for orthophosphate release. Bioessays 2023; 45:e2300040. [PMID: 37366639 DOI: 10.1002/bies.202300040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/30/2023] [Accepted: 06/01/2023] [Indexed: 06/28/2023]
Abstract
Release of the ATP hydrolysis product ortophosphate (Pi) from the active site of myosin is central in chemo-mechanical energy transduction and closely associated with the main force-generating structural change, the power-stroke. Despite intense investigations, the relative timing between Pi-release and the power-stroke remains poorly understood. This hampers in depth understanding of force production by myosin in health and disease and our understanding of myosin-active drugs. Since the 1990s and up to today, models that incorporate the Pi-release either distinctly before or after the power-stroke, in unbranched kinetic schemes, have dominated the literature. However, in recent years, alternative models have emerged to explain apparently contradictory findings. Here, we first compare and critically analyze three influential alternative models proposed previously. These are either characterized by a branched kinetic scheme or by partial uncoupling of Pi-release and the power-stroke. Finally, we suggest critical tests of the models aiming for a unified picture.
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Affiliation(s)
- Alf Månsson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Marko Ušaj
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Luisa Moretto
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Oleg Matusovsky
- Department of Kinesiology and Physical Education, McGill University, Montreal, Québec, Canada
| | - Lok Priya Velayuthan
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Ran Friedman
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Québec, Canada
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Cheng YS, Elkrief D, Rassier DE. Effects of blebbistatin on force production, actin motility and the force-velocity relation produced by myosin II filaments and myofibrils. Biophys J 2023; 122:116a-117a. [PMID: 36782507 DOI: 10.1016/j.bpj.2022.11.805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Affiliation(s)
- Yu-Shu Cheng
- Department of Kinesiology & Physical Education, McGill University, Montreal, QC, Canada
| | | | - Dilson E Rassier
- Department of Kinesiology & Physical Education, McGill University, Montreal, QC, Canada
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Matusovsky OS, Månsson A, Rassier DE. Cooperativity of myosin II motors in the non-regulated and regulated thin filaments investigated with high-speed AFM. J Gen Physiol 2023; 155:213801. [PMID: 36633585 PMCID: PMC9859764 DOI: 10.1085/jgp.202213190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 09/09/2022] [Accepted: 11/23/2022] [Indexed: 01/13/2023] Open
Abstract
Skeletal myosins II are non-processive molecular motors that work in ensembles to produce muscle contraction while binding to the actin filament. Although the molecular properties of myosin II are well known, there is still debate about the collective work of the motors: is there cooperativity between myosin motors while binding to the actin filaments? In this study, we use high-speed AFM to evaluate this issue. We observed that the initial binding of small arrays of myosin heads to the non-regulated actin filaments did not affect the cooperative probability of subsequent bindings and did not lead to an increase in the fractional occupancy of the actin binding sites. These results suggest that myosin motors are independent force generators when connected in small arrays, and that the binding of one myosin does not alter the kinetics of other myosins. In contrast, the probability of binding of myosin heads to regulated thin filaments under activating conditions (at high Ca2+ concentration in the presence of 2 μM ATP) was increased with the initial binding of one myosin, leading to a larger occupancy of available binding sites at the next half-helical pitch of the filament. The result suggests that myosin cooperativity is observed over five pseudo-repeats and defined by the activation status of the thin filaments.
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Affiliation(s)
- Oleg S. Matusovsky
- Department of Kinesiology and Physical Education, McGill University, Montreal, Québec, Canada
| | - Alf Månsson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Dilson E. Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Québec, Canada,Correspondence to Dilson E. Rassier:
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Pironti G, Gastaldello S, Rassier DE, Lanner JT, Carlström M, Lund LH, Westerblad H, Yamada T, Andersson DC. Citrullination is linked to reduced Ca 2+ sensitivity in hearts of a murine model of rheumatoid arthritis. Acta Physiol (Oxf) 2022; 236:e13869. [PMID: 36002394 PMCID: PMC9788013 DOI: 10.1111/apha.13869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 01/29/2023]
Abstract
AIMS Cardiac contractile dysfunction is prevalent in rheumatoid arthritis (RA), with an increased risk for heart failure. A hallmark of RA has increased levels of peptidyl arginine deaminases (PAD) that convert arginine to citrulline leading to ubiquitous citrullination, including in the heart. We aimed to investigate whether PAD-dependent citrullination in the heart was linked to contractile function in a mouse model of RA during the acute inflammatory phase. METHODS We used hearts from the collagen-induced arthritis (CIA) mice, with overt arthritis, and control mice to analyze cardiomyocyte Ca2+ handling and fractional shortening, the force-Ca2+ relationship in isolated myofibrils, the levels of PAD, protein post-translational modifications, and Ca2+ handling protein. Then, we used an in vitro model to investigate the role of TNF-α in the PAD-mediated citrullination of proteins in cardiomyocytes. RESULTS Cardiomyocytes from CIA mice displayed larger Ca2+ transients than controls, whereas cell shortening was similar in the two groups. Myofibrils from CIA hearts required higher [Ca2+ ] to reach 50% of maximum shortening, ie Ca2+ sensitivity was lower. This was associated with increased PAD2 expression and α-actin citrullination. TNF-α increased PAD-mediated citrullination which was blocked by pre-treatment with the PAD inhibitor 2-chloroacetamide. CONCLUSION Using a mouse RA model we found evidence of impaired cardiac contractile function linked to reduced Ca2+ sensitivity, increased expression of PAD2, and citrullination of α-actin, which was triggered by TNF-α. This provides molecular and physiological evidence for acquired cardiomyopathy and a potential mechanism for RA-associated heart failure.
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Affiliation(s)
- Gianluigi Pironti
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden,Department of Medicine, Cardiology Research UnitKarolinska InstitutetStockholmSweden
| | - Stefano Gastaldello
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden
| | - Dilson E. Rassier
- Department of Kinesiology and Physical EducationMcGill UniversityMontrealCanada
| | - Johanna T. Lanner
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden
| | - Mattias Carlström
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden
| | - Lars H. Lund
- Department of Medicine, Cardiology Research UnitKarolinska InstitutetStockholmSweden,Heart, Vascular and Neurology Theme, Cardiology UnitKarolinska University HospitalStockholmSweden
| | - Håkan Westerblad
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden
| | - Takashi Yamada
- School of Health Sciences, Sapporo Medical UniversitySapporoJapan
| | - Daniel C. Andersson
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden,Heart, Vascular and Neurology Theme, Cardiology UnitKarolinska University HospitalStockholmSweden
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Månsson A, Rassier DE. Insights into Muscle Contraction Derived from the Effects of Small-Molecular Actomyosin-Modulating Compounds. Int J Mol Sci 2022; 23:ijms232012084. [PMID: 36292937 PMCID: PMC9603234 DOI: 10.3390/ijms232012084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/25/2022] [Accepted: 10/03/2022] [Indexed: 01/10/2023] Open
Abstract
Bottom-up mechanokinetic models predict ensemble function of actin and myosin based on parameter values derived from studies using isolated proteins. To be generally useful, e.g., to analyze disease effects, such models must also be able to predict ensemble function when actomyosin interaction kinetics are modified differently from normal. Here, we test this capability for a model recently shown to predict several physiological phenomena along with the effects of the small molecular compound blebbistatin. We demonstrate that this model also qualitatively predicts effects of other well-characterized drugs as well as varied concentrations of MgATP. However, the effects of one compound, amrinone, are not well accounted for quantitatively. We therefore systematically varied key model parameters to address this issue, leading to the increased amplitude of the second sub-stroke of the power stroke from 1 nm to 2.2 nm, an unchanged first sub-stroke (5.3−5.5 nm), and an effective cross-bridge attachment rate that more than doubled. In addition to better accounting for the effects of amrinone, the modified model also accounts well for normal physiological ensemble function. Moreover, a Monte Carlo simulation-based version of the model was used to evaluate force−velocity data from small myosin ensembles. We discuss our findings in relation to key aspects of actin−myosin operation mechanisms causing a non-hyperbolic shape of the force−velocity relationship at high loads. We also discuss remaining limitations of the model, including uncertainty of whether the cross-bridge elasticity is linear or not, the capability to account for contractile properties of very small actomyosin ensembles (<20 myosin heads), and the mechanism for requirements of a higher cross-bridge attachment rate during shortening compared to during isometric contraction.
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Affiliation(s)
- Alf Månsson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, 391 82 Kalmar, Sweden
- Correspondence: ; Tel.: +46-708-866243
| | - Dilson E. Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada
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9
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Elkrief D, Cheng YS, Matusovsky OS, Rassier DE. Oxidation alters myosin-actin interaction and force generation in skeletal muscle filaments. Am J Physiol Cell Physiol 2022; 323:C1206-C1214. [PMID: 36062880 DOI: 10.1152/ajpcell.00427.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The interaction between actin and myosin is the basis of contraction and force production in muscle fibers. Studies have shown that actin and myosin oxidation cause myofibrillar weakness in healthy and diseased muscles. The degree to which oxidation of each of these proteins contributes to an attenuated force in myofibrils is unclear. In this study, we show that exposure of actin and myosin to the chemical 5-amino-3-(4-morpholinyl)-1,2,3-oxadiazolium chloride (SIN-1), a NO and O2-• donor, affected actin-myosin interactions, as shown by a decreased myosin-propelled actin velocity in the in vitromotility assay. We also observed that oxidation of actin and myosin resulted in a decrease in force generated by myosin and actin filaments, as determined by a system of micro-fabricated cantilevers. While myosin is more sensitive to oxidative modifications than actin, as indicated by a steeper decrease in velocity and force by the filaments, modifications on actin are sufficient to affect force and velocity and also contribute to a decrease in contractile activity in muscles.
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Affiliation(s)
- Daren Elkrief
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - Yu-Shu Cheng
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Oleg S Matusovsky
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Dilson E Rassier
- Department of Physiology, McGill University, Montreal, Quebec, Canada.,Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
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10
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Rassier DE, Mansson AL, Matusovskiy O. Differences in cooperativity of myosin II motors in actin and regulated thin filaments. Biophys J 2022. [DOI: 10.1016/j.bpj.2021.11.2712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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11
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Pierantozzi E, Szentesi P, Paolini C, Dienes B, Fodor J, Oláh T, Colombini B, Rassier DE, Rubino EM, Lange S, Rossi D, Csernoch L, Bagni MA, Reggiani C, Sorrentino V. Impaired Intracellular Ca 2+ Dynamics, M-Band and Sarcomere Fragility in Skeletal Muscles of Obscurin KO Mice. Int J Mol Sci 2022; 23:1319. [PMID: 35163243 PMCID: PMC8835721 DOI: 10.3390/ijms23031319] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 12/16/2022] Open
Abstract
Obscurin is a giant sarcomeric protein expressed in striated muscles known to establish several interactions with other proteins of the sarcomere, but also with proteins of the sarcoplasmic reticulum and costameres. Here, we report experiments aiming to better understand the contribution of obscurin to skeletal muscle fibers, starting with a detailed characterization of the diaphragm muscle function, which we previously reported to be the most affected muscle in obscurin (Obscn) KO mice. Twitch and tetanus tension were not significantly different in the diaphragm of WT and Obscn KO mice, while the time to peak (TTP) and half relaxation time (HRT) were prolonged. Differences in force-frequency and force-velocity relationships and an enhanced fatigability are observed in an Obscn KO diaphragm with respect to WT controls. Voltage clamp experiments show that a sarcoplasmic reticulum's Ca2+ release and SERCA reuptake rates were decreased in muscle fibers from Obscn KO mice, suggesting that an impairment in intracellular Ca2+ dynamics could explain the observed differences in the TTP and HRT in the diaphragm. In partial contrast with previous observations, Obscn KO mice show a normal exercise tolerance, but fiber damage, the altered sarcomere ultrastructure and M-band disarray are still observed after intense exercise.
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Affiliation(s)
- Enrico Pierantozzi
- Department of Molecular and Developmental Medicine, Molecular Medicine Section, University of Siena, 53100 Siena, Italy; (E.P.); (E.M.R.); (D.R.)
| | - Péter Szentesi
- Department of Physiology, Faculty of Medicine, University of Debrecen, H-4002 Debrecen, Hungary; (P.S.); (B.D.); (J.F.); (T.O.); (L.C.)
| | - Cecilia Paolini
- Department of Neuroscience, Imaging and Clinical Sciences, University Gabriele d’ Annunzio of Chieti, 66100 Chieti, Italy;
| | - Beatrix Dienes
- Department of Physiology, Faculty of Medicine, University of Debrecen, H-4002 Debrecen, Hungary; (P.S.); (B.D.); (J.F.); (T.O.); (L.C.)
| | - János Fodor
- Department of Physiology, Faculty of Medicine, University of Debrecen, H-4002 Debrecen, Hungary; (P.S.); (B.D.); (J.F.); (T.O.); (L.C.)
| | - Tamás Oláh
- Department of Physiology, Faculty of Medicine, University of Debrecen, H-4002 Debrecen, Hungary; (P.S.); (B.D.); (J.F.); (T.O.); (L.C.)
| | - Barbara Colombini
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy; (B.C.); (M.A.B.)
| | - Dilson E. Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada;
| | - Egidio Maria Rubino
- Department of Molecular and Developmental Medicine, Molecular Medicine Section, University of Siena, 53100 Siena, Italy; (E.P.); (E.M.R.); (D.R.)
| | - Stephan Lange
- Biomedical Research Facility 2, School of Medicine, University of California, La Jolla, CA 92093, USA;
- Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, 413 45 Gothenburg, Sweden
| | - Daniela Rossi
- Department of Molecular and Developmental Medicine, Molecular Medicine Section, University of Siena, 53100 Siena, Italy; (E.P.); (E.M.R.); (D.R.)
| | - László Csernoch
- Department of Physiology, Faculty of Medicine, University of Debrecen, H-4002 Debrecen, Hungary; (P.S.); (B.D.); (J.F.); (T.O.); (L.C.)
| | - Maria Angela Bagni
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy; (B.C.); (M.A.B.)
| | - Carlo Reggiani
- Department of Biomedical Science, University of Padova, 35121 Padova, Italy;
- Science and Research Center Koper, Institute for Kinesiology Research, 6000 Koper, Slovenia
| | - Vincenzo Sorrentino
- Department of Molecular and Developmental Medicine, Molecular Medicine Section, University of Siena, 53100 Siena, Italy; (E.P.); (E.M.R.); (D.R.)
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Matusovsky OS, Kodera N, MacEachen C, Ando T, Cheng YS, Rassier DE. Millisecond Conformational Dynamics of Skeletal Myosin II Power Stroke Studied by High-Speed Atomic Force Microscopy. ACS Nano 2021; 15:2229-2239. [PMID: 33297671 DOI: 10.1021/acsnano.0c06820] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Myosin-based molecular motors are responsible for a variety of functions in the cells. Myosin II is ultimately responsible for muscle contraction and can be affected by multiple mutations, that may lead to myopathies. Therefore, it is essential to understand the nanomechanical properties of myosin II. Due to the lack of technical capabilities to visualize rapid changes in nonprocessive molecular motors, there are several mechanistic details in the force-generating steps produced by myosin II that are poorly understood. In this study, high-speed atomic force microscopy was used to visualize the actin-myosin complex at high temporal and spatial resolutions, providing further details about the myosin mechanism of force generation. A two-step motion of the double-headed heavy meromyosin (HMM) lever arm, coupled to an 8.4 nm working stroke was observed in the presence of ATP. HMM heads attached to an actin filament worked independently, exhibiting different lever arm configurations in given time during experiments. A lever arm rotation was associated with several non-stereospecific long-lived and stereospecific short-lived (∼1 ms) HMM conformations. The presence of free Pi increased the short-lived stereospecific binding events in which the power stroke occurred, followed by release of Pi after the power stroke.
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Affiliation(s)
- Oleg S Matusovsky
- Department of Kinesiology and Physical Education, McGill University, Montreal H2W1S4, Canada
| | - Noriyuki Kodera
- Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa 920-1192, Japan
| | - Caitlin MacEachen
- Department of Kinesiology and Physical Education, McGill University, Montreal H2W1S4, Canada
| | - Toshio Ando
- Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa 920-1192, Japan
| | - Yu-Shu Cheng
- Department of Kinesiology and Physical Education, McGill University, Montreal H2W1S4, Canada
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal H2W1S4, Canada
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13
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Pedrazzani PS, Araújo TOP, Sigoli E, da Silva IR, da Roza DL, Chesca DL, Rassier DE, Cornachione AS. Twenty-one days of low-intensity eccentric training improve morphological characteristics and function of soleus muscles of mdx mice. Sci Rep 2021; 11:3579. [PMID: 33574358 PMCID: PMC7878734 DOI: 10.1038/s41598-020-79168-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 11/25/2020] [Indexed: 11/09/2022] Open
Abstract
Duchene muscular dystrophy (DMD) is caused by the absence of the protein dystrophin, which leads to muscle weakness, progressive degeneration, and eventually death due to respiratory failure. Low-intensity eccentric training (LIET) has been used as a rehabilitation method in skeletal muscles after disuse. Recently, LIET has also been used for rehabilitating dystrophic muscles, but its effects are still unclear. The purpose of this study was to investigate the effects of 21 days of LIET in dystrophic soleus muscle. Thirty-six male mdx mice were randomized into six groups (n = 6/each): mdx sedentary group; mdx training group-3 days; mdx training group-21 days; wild-type sedentary group; wild-type training group-3 days and wild-type training group-21 days. After the training sessions, animals were euthanized, and fragments of soleus muscles were removed for immunofluorescence and histological analyses, and measurements of active force and Ca2+ sensitivity of the contractile apparatus. Muscles of the mdx training group-21 days showed an improvement in morphological characteristics and an increase of active force when compared to the sedentary mdx group. The results show that LIET can improve the functionality of dystrophic soleus muscle in mice.
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Affiliation(s)
- Paulo S Pedrazzani
- Department of Physiological Science, Federal University of São Carlos (UFSCar), São Carlos, Brazil
| | - Tatiana O P Araújo
- Department of Physiological Science, Federal University of São Carlos (UFSCar), São Carlos, Brazil
| | - Emilly Sigoli
- Department of Physiological Science, Federal University of São Carlos (UFSCar), São Carlos, Brazil
| | - Isabella R da Silva
- Department of Physiological Science, Federal University of São Carlos (UFSCar), São Carlos, Brazil
| | - Daiane Leite da Roza
- Department of Neurosciences and Behaviour, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Deise Lucia Chesca
- Department of Pathology and Legal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Anabelle S Cornachione
- Department of Physiological Science, Federal University of São Carlos (UFSCar), São Carlos, Brazil.
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14
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de Souza Leite F, Rassier DE. Sarcomere Length Nonuniformity and Force Regulation in Myofibrils and Sarcomeres. Biophys J 2020; 119:2372-2377. [PMID: 33217382 DOI: 10.1016/j.bpj.2020.11.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/21/2020] [Accepted: 11/05/2020] [Indexed: 10/23/2022] Open
Abstract
The smallest contractile unit in striated muscles is the sarcomere. Although some of the classic features of contraction assume a uniform behavior of sarcomeres within myofibrils, the occurrence of sarcomere length nonuniformities has been well recognized for years, but it is yet not well understood. In the past years, there has been a great advance in experiments using isolated myofibrils and sarcomeres that has allowed scientists to directly evaluate sarcomere length nonuniformity. This review will focus on studies conducted with these preparations to develop the hypotheses that 1) force production in myofibrils is largely altered and regulated by intersarcomere dynamics and that 2) the mechanical work of one sarcomere in a myofibril is transmitted to other sarcomeres in series. We evaluated studies looking into myofibril activation, relaxation, and force changes produced during activation. We conclude that force production in myofibrils is largely regulated by intersarcomere dynamics, which arises from the cooperative work of the contractile and elastic elements within a myofibril.
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Affiliation(s)
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada.
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15
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Haeger R, de Souza Leite F, Rassier DE. Sarcomere length non-uniformities dictate force production along the descending limb of the force-length relation. Proc Biol Sci 2020; 287:20202133. [PMID: 33109011 DOI: 10.1098/rspb.2020.2133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The force-length relation is one of the most defining features of muscle contraction, and yet a topic of debate in the literature. The sliding filament theory predicts that the force produced by muscle fibres is proportional to the degree of overlap between myosin and actin filaments, producing a linear descending limb of the active force-length relation. However, several studies have shown forces that are larger than predicted, especially at long sarcomere lengths (SLs). Studies have been conducted with muscle fibres, preparations containing thousands of sarcomeres that make measurements of individual SL challenging. The aim of this study was to evaluate force production and sarcomere dynamics in isolated myofibrils and single sarcomeres from the rabbit psoas muscle to enhance our understanding of the theoretically predicted force-length relation. Contractions at varying SLs along the plateau (SL = 2.25-2.39 µm) and the descending limb (SL > 2.39 µm) of the force-length relation were induced in sarcomeres and myofibrils, and different modes of force measurements were used. Our results show that when forces are measured in single sarcomeres, the experimental force-length relation follows theoretical predictions. When forces are measured in myofibrils with large SL dispersions, there is an extension of the plateau and forces elevated above the predicted levels along the descending limb. We also found an increase in SL non-uniformity and slowed rates of force production at long lengths in myofibrils but not in single sarcomere preparations. We conclude that the deviation of the descending limb of the force-length relation is correlated with the degree of SL non-uniformity and slowed force development.
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Affiliation(s)
- Ricarda Haeger
- Kinesiology and Physical Education, McGill University, Montreal, QC, Canada
| | | | - Dilson E Rassier
- Kinesiology and Physical Education, McGill University, Montreal, QC, Canada
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16
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van de Locht M, de Winter JM, Rassier DE, Helmes MHB, Ottenheijm CAC. Isolating Myofibrils from Skeletal Muscle Biopsies and Determining Contractile Function with a Nano-Newton Resolution Force Transducer. J Vis Exp 2020. [PMID: 32449720 DOI: 10.3791/61002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Striated muscle cells are indispensable for the activity of humans and animals. Single muscle fibers are comprised of myofibrils, which consist of serially linked sarcomeres, the smallest contractile units in muscle. Sarcomeric dysfunction contributes to muscle weakness in patients with mutations in genes encoding for sarcomeric proteins. The study of myofibril mechanics allows for the assessment of actin-myosin interactions without potential confounding effects of damaged, adjacent myofibrils when measuring the contractility of single muscle fibers. Ultrastructural damage and misalignment of myofibrils might contribute to impaired contractility. If structural damage is present in the myofibrils, they likely break during the isolation procedure or during the experiment. Furthermore, studies in myofibrils provide the assessment of actin-myosin interactions in the presence of the geometrical constraints of the sarcomeres. For instance, measurements in myofibrils can elucidate whether myofibrillar dysfunction is the primary effect of a mutation in a sarcomeric protein. In addition, perfusion with calcium solutions or compounds is almost instant due to the small diameter of the myofibril. This makes myofibrils eminently suitable to measure the rates of activation and relaxation during force production. The protocol described in this paper employs an optical force probe based on the principle of a Fabry-Pérot interferometer capable of measuring forces in the nano-Newton range, coupled to a piezo length motor and a fast-step perfusion system. This setup enables the study of myofibril mechanics with high resolution force measurements.
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Affiliation(s)
| | | | - Dilson E Rassier
- Department of Kinesiology and Physical Education, Faculty of Education, McGill University
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17
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Mendoza AC, Rassier DE. Extraction of Thick Filaments in Individual Sarcomeres Affects Force Production by Single Myofibrils. Biophys J 2020; 118:1921-1929. [PMID: 32251620 DOI: 10.1016/j.bpj.2020.03.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 03/04/2020] [Accepted: 03/06/2020] [Indexed: 11/26/2022] Open
Abstract
It has been accepted that the force produced by a skeletal muscle myofibril depends on its cross-sectional area but not on the number of active sarcomeres because they are arranged in series. However, a previous study performed by our group showed that blocking actomyosin interactions within an activated myofibril and depleting the thick filaments in one sarcomere unexpectedly reduced force production. In this study, we examined in detail how consecutive depletion of thick filaments in individual sarcomeres within a myofibril affects force production. Myofibrils isolated from rabbit psoas were activated and relaxed using a perfusion system. An extra microperfusion needle filled with a high-ionic strength solution was used to erase thick filaments in individual sarcomeres in real time before myofibril activation. The isometric forces were measured upon activation. The force produced by myofibrils with intact sarcomeres was significantly higher than the force produced by myofibrils with one or more sarcomeres lacking thick filaments (p < 0.0001) irrespective of the number of contractions imposed on the myofibrils and their initial sarcomere length. Our results suggest that the myofibril force is affected by intersarcomere dynamics and the number of active sarcomeres in series.
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Affiliation(s)
- Andrea C Mendoza
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada.
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18
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de Winter JM, Molenaar JP, Yuen M, van der Pijl R, Shen S, Conijn S, van de Locht M, Willigenburg M, Bogaards SJ, van Kleef ES, Lassche S, Persson M, Rassier DE, Sztal TE, Ruparelia AA, Oorschot V, Ramm G, Hall TE, Xiong Z, Johnson CN, Li F, Kiss B, Lozano-Vidal N, Boon RA, Marabita M, Nogara L, Blaauw B, Rodenburg RJ, Küsters B, Doorduin J, Beggs AH, Granzier H, Campbell K, Ma W, Irving T, Malfatti E, Romero NB, Bryson-Richardson RJ, van Engelen BG, Voermans NC, Ottenheijm CA. KBTBD13 is an actin-binding protein that modulates muscle kinetics. J Clin Invest 2020; 130:754-767. [PMID: 31671076 PMCID: PMC6994151 DOI: 10.1172/jci124000] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 10/24/2019] [Indexed: 11/17/2022] Open
Abstract
The mechanisms that modulate the kinetics of muscle relaxation are critically important for muscle function. A prime example of the impact of impaired relaxation kinetics is nemaline myopathy caused by mutations in KBTBD13 (NEM6). In addition to weakness, NEM6 patients have slow muscle relaxation, compromising contractility and daily life activities. The role of KBTBD13 in muscle is unknown, and the pathomechanism underlying NEM6 is undetermined. A combination of transcranial magnetic stimulation-induced muscle relaxation, muscle fiber- and sarcomere-contractility assays, low-angle x-ray diffraction, and superresolution microscopy revealed that the impaired muscle-relaxation kinetics in NEM6 patients are caused by structural changes in the thin filament, a sarcomeric microstructure. Using homology modeling and binding and contractility assays with recombinant KBTBD13, Kbtbd13-knockout and Kbtbd13R408C-knockin mouse models, and a GFP-labeled Kbtbd13-transgenic zebrafish model, we discovered that KBTBD13 binds to actin - a major constituent of the thin filament - and that mutations in KBTBD13 cause structural changes impairing muscle-relaxation kinetics. We propose that this actin-based impaired relaxation is central to NEM6 pathology.
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Affiliation(s)
| | - Joery P. Molenaar
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
- Department of Neurology, Rijnstate Hospital, Arnhem, Netherlands
| | - Michaela Yuen
- Department of Physiology, Amsterdam University Medical Center, Netherlands
- Discipline of Paediatrics and Child Health, Faculty of Medicine, University of Sydney, Australia
| | - Robbert van der Pijl
- Department of Physiology, Amsterdam University Medical Center, Netherlands
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | - Shengyi Shen
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | - Stefan Conijn
- Department of Physiology, Amsterdam University Medical Center, Netherlands
| | | | - Menne Willigenburg
- Department of Physiology, Amsterdam University Medical Center, Netherlands
| | | | - Esmee S.B. van Kleef
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Saskia Lassche
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Malin Persson
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Dilson E. Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Tamar E. Sztal
- School of Biological Sciences, Monash University, Melbourne, Australia
| | | | - Viola Oorschot
- Monash Ramaciotti Centre for Structural Cryo-Electron Microscopy, Monash University, Melbourne, Australia
| | - Georg Ramm
- Monash Ramaciotti Centre for Structural Cryo-Electron Microscopy, Monash University, Melbourne, Australia
- Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia
| | - Thomas E. Hall
- Institute for Molecular Bioscience, University of Queensland, Queensland, Australia
| | - Zherui Xiong
- Institute for Molecular Bioscience, University of Queensland, Queensland, Australia
| | - Christopher N. Johnson
- Division of Clinical Pharmacology, Center for Arrhythmia Research and Therapeutics and Center for Structural Biology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Frank Li
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | - Balazs Kiss
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | | | - Reinier A. Boon
- Department of Physiology, Amsterdam University Medical Center, Netherlands
| | - Manuela Marabita
- Venetian Institute of Molecular Medicine, Department of Biomedical Sciences, University of Padova, Italy
| | - Leonardo Nogara
- Venetian Institute of Molecular Medicine, Department of Biomedical Sciences, University of Padova, Italy
| | - Bert Blaauw
- Venetian Institute of Molecular Medicine, Department of Biomedical Sciences, University of Padova, Italy
| | - Richard J. Rodenburg
- Department of Pediatrics, Radboud University Medical Centre, Translational Metabolic Laboratory, Nijmegen, Netherlands
| | - Benno Küsters
- Department of Pathology, Radboud University Medical Centre, Nijmegen, Netherlands
| | - Jonne Doorduin
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Alan H. Beggs
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Henk Granzier
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | - Ken Campbell
- Department of Physiology and Division of Cardiovascular Medicine, University of Kentucky, Lexington, Kentucky, USA
| | - Weikang Ma
- BioCAT, Illinois Institute of Technology, Chicago, Illinois, USA
| | - Thomas Irving
- BioCAT, Illinois Institute of Technology, Chicago, Illinois, USA
| | - Edoardo Malfatti
- Service Neurologie Médicale, Centre de Référence Maladies Neuromusculaire Paris-Nord CHU Raymond-Poincaré, U1179 UVSQ-INSERM Handicap Neuromusculaire: Physiologie, Biothérapie et Pharmacologie Appliquées, UFR des Sciences de la Santé Simone Veil, Université Versailles-Saint-Quentin-en-Yvelines, Garches, France
| | - Norma B. Romero
- Sorbonne Université, Myology Institute, Neuromuscular Morphology Unit, Center for Research in Myology, GH Pitié-Salpêtrière Paris, France
- Centre de Référence de Pathologie Neuromusculaire Paris-Est, GHU Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | | | - Baziel G.M. van Engelen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Nicol C. Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Coen A.C. Ottenheijm
- Department of Physiology, Amsterdam University Medical Center, Netherlands
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
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19
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Nelson SR, Li A, Rahmanseresht S, Braet F, Cornachione AS, Beck Previs S, O'Leary T, McNamara JW, Rassier DE, Sadayappan S, Previs MJ, Warshaw DM. Skeletal Myosin-Binding Protein C Isoforms Differentially Regulate Fast- and Slow-Twitch Skeletal Muscle Function. Biophys J 2020. [DOI: 10.1016/j.bpj.2019.11.1593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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20
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Cheng YS, de Souza Leite F, Rassier DE. The load dependence and the force-velocity relation in intact myosin filaments from skeletal and smooth muscles. Am J Physiol Cell Physiol 2020; 318:C103-C110. [PMID: 31618078 PMCID: PMC6985831 DOI: 10.1152/ajpcell.00339.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 11/22/2022]
Abstract
In the present study we evaluated the load dependence of force produced by isolated muscle myosin filaments interacting with fluorescently labeled actin filaments, using for the first time whole native myosin filaments. We used a newly developed approach that allowed the use of physiological levels of ATP. Single filaments composed of either skeletal or smooth muscle myosin and single filaments of actin were attached between pairs of nano-fabricated cantilevers of known stiffness. The filaments were brought into contact to produce force, which caused sliding of the actin filaments over the myosin filaments. We applied load to the system by either pushing or pulling the filaments during interactions and observed that increasing the load increased the force produced by myosin and decreasing the load decreased the force. We also performed additional experiments in which we clamped the filaments at predetermined levels of force, which caused the filaments to slide to adjust the different loads, allowing us to measure the velocity of length changes to construct a force-velocity relation. Force values were in the range observed previously with myosin filaments and molecules. The force-velocity curves for skeletal and smooth muscle myosins resembled the relations observed for muscle fibers. The technique can be used to investigate many issues of interest and debate in the field of muscle biophysics.
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Affiliation(s)
- Yu-Shu Cheng
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Felipe de Souza Leite
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
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21
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Persson M, Steinz MM, Westerblad H, Lanner JT, Rassier DE. Force generated by myosin cross-bridges is reduced in myofibrils exposed to ROS/RNS. Am J Physiol Cell Physiol 2019; 317:C1304-C1312. [DOI: 10.1152/ajpcell.00272.2019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Skeletal muscle weakness is associated with oxidative stress and oxidative posttranslational modifications on contractile proteins. There is indirect evidence that reactive oxygen/nitrogen species (ROS/RNS) affect skeletal muscle myofibrillar function, although the details of the acute effects of ROS/RNS on myosin-actin interactions are not known. In this study, we examined the effects of peroxynitrite (ONOO−) on the contractile properties of individual skeletal muscle myofibrils by monitoring myofibril-induced displacements of an atomic force cantilever upon activation and relaxation. The isometric force decreased by ~50% in myofibrils treated with the ONOO− donor (SIN-1) or directly with ONOO−, which was independent of the cross-bridge abundancy condition (i.e., rigor or relaxing condition) during SIN-1 or ONOO− treatment. The force decrease was attributed to an increase in the cross-bridge detachment rate ( gapp) in combination with a conservation of the force redevelopment rate (kTr) and hence, an increase in the population of cross-bridges transitioning from force-generating to non-force-generating cross-bridges during steady-state. Taken together, the results of this study provide important information on how ROS/RNS affect myofibrillar force production which may be of importance for conditions where increased oxidative stress is part of the pathophysiology.
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Affiliation(s)
- Malin Persson
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Maarten M. Steinz
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Håkan Westerblad
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Johanna T. Lanner
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Dilson E. Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
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22
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Rahman MA, Ušaj M, Rassier DE, Månsson A. Blebbistatin Effects Expose Hidden Secrets in the Force-Generating Cycle of Actin and Myosin. Biophys J 2019; 115:386-397. [PMID: 30021113 PMCID: PMC6050972 DOI: 10.1016/j.bpj.2018.05.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 05/17/2018] [Accepted: 05/30/2018] [Indexed: 12/19/2022] Open
Abstract
Cyclic interactions between myosin II motors and actin filaments driven by ATP turnover underlie muscle contraction and have key roles in the motility of nonmuscle cells. A remaining enigma in the understanding of this interaction is the relationship between the force-generating structural change and the release of the ATP-hydrolysis product, inorganic phosphate (Pi), from the active site of myosin. Here, we use the small molecular compound blebbistatin to probe otherwise hidden states and transitions in this process. Different hypotheses for the Pi release mechanism are tested by interpreting experimental results from in vitro motility assays and isolated muscle fibers in terms of mechanokinetic actomyosin models. The data fit with ideas that actomyosin force generation is preceded by Pi release, which in turn is preceded by two serial transitions after/coincident with cross-bridge attachment. Blebbistatin changes the rate limitation of the cycle from the first to the second of these transitions, uncovering functional roles of an otherwise short-lived pre-power stroke state that has been implicated by structural data.
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Affiliation(s)
- Mohammad A Rahman
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Marko Ušaj
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Alf Månsson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden.
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23
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Liang F, Emeriaud G, Rassier DE, Shang D, Gusev E, Hussain SNA, Sage M, Crulli B, Fortin-Pellerin E, Praud JP, Petrof BJ. Mechanical ventilation causes diaphragm dysfunction in newborn lambs. Crit Care 2019; 23:123. [PMID: 30992039 PMCID: PMC6469194 DOI: 10.1186/s13054-019-2409-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 03/25/2019] [Indexed: 01/11/2023]
Abstract
Background Diaphragm weakness occurs rapidly in adult animals treated with mechanical ventilation (MV), but the effects of MV on the neonatal diaphragm have not been determined. Furthermore, it is unknown whether co-existent lung disease exacerbates ventilator-induced diaphragmatic dysfunction (VIDD). We investigated the impact of MV (mean duration = 7.65 h), either with or without co-existent respiratory failure caused by surfactant deficiency, on the development of VIDD in newborn lambs. Methods Newborn lambs (1–4 days) were assigned to control (CTL, non-ventilated), mechanically ventilated (MV), and MV + experimentally induced surfactant deficiency (MV+SD) groups. Immunoblotting and quantitative PCR assessed inflammatory signaling, the ubiquitin-proteasome system, autophagy, and oxidative stress. Immunostaining for myosin heavy chain (MyHC) isoforms and quantitative morphometry evaluated diaphragm atrophy. Contractile function of the diaphragm was determined in isolated myofibrils ex vivo. Results Equal decreases (25–30%) in myofibrillar force generation were found in MV and MV+SD diaphragms compared to CTL. In comparison to CTL, both MV and MV+SD diaphragms also demonstrated increased STAT3 transcription factor phosphorylation. Ubiquitin-proteasome system (Atrogin1 and MuRF1) transcripts and autophagy indices (Gabarapl1 transcripts and the ratio of LC3B-II/LC3B-I protein) were greater in MV+SD relative to MV alone, but fiber type atrophy was not observed in any group. Protein carbonylation and 4-hydroxynonenal levels (indices of oxidative stress) also did not differ among groups. Conclusions In newborn lambs undergoing controlled MV, there is a rapid onset of diaphragm dysfunction consistent with VIDD. Superimposed lung injury caused by surfactant deficiency did not influence the severity of early diaphragm weakness. Electronic supplementary material The online version of this article (10.1186/s13054-019-2409-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Feng Liang
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada
| | - Guillaume Emeriaud
- Pediatric Intensive Care Unit, Department of Pediatrics, Sainte-Justine Hospital, University of Montreal, Montreal, QC, Canada
| | - Dilson E Rassier
- Department of Kinesiology, McGill University, Montreal, QC, Canada
| | - Dong Shang
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada
| | - Ekaterina Gusev
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada
| | - Sabah N A Hussain
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada
| | - Michael Sage
- Neonatal Respiratory Research Unit, Department of Pediatrics, University of Sherbrooke, Sherbrooke, QC, Canada
| | - Benjamin Crulli
- Pediatric Intensive Care Unit, Department of Pediatrics, Sainte-Justine Hospital, University of Montreal, Montreal, QC, Canada
| | - Etienne Fortin-Pellerin
- Neonatal Respiratory Research Unit, Department of Pediatrics, University of Sherbrooke, Sherbrooke, QC, Canada
| | - Jean-Paul Praud
- Neonatal Respiratory Research Unit, Department of Pediatrics, University of Sherbrooke, Sherbrooke, QC, Canada
| | - Basil J Petrof
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada.
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24
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Steinz MM, Persson M, Aresh B, Olsson K, Cheng AJ, Ahlstrand E, Lilja M, Lundberg TR, Rullman E, Möller KÄ, Sandor K, Ajeganova S, Yamada T, Beard N, Karlsson BC, Tavi P, Kenne E, Svensson CI, Rassier DE, Karlsson R, Friedman R, Gustafsson T, Lanner JT. Oxidative hotspots on actin promote skeletal muscle weakness in rheumatoid arthritis. JCI Insight 2019; 5:126347. [PMID: 30920392 DOI: 10.1172/jci.insight.126347] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Skeletal muscle weakness in patients suffering from rheumatoid arthritis (RA) adds to their impaired working abilities and reduced quality of life. However, little molecular insight is available on muscle weakness associated with RA. Oxidative stress has been implicated in the disease pathogenesis of RA. Here we show that oxidative post-translational modifications of the contractile machinery targeted to actin result in impaired actin polymerization and reduced force production. Using mass spectrometry, we identified the actin residues targeted by oxidative 3-nitrotyrosine (3-NT) or malondialdehyde adduct (MDA) modifications in weakened skeletal muscle from mice with arthritis and patients afflicted by RA. The residues were primarily located to three distinct regions positioned at matching surface areas of the skeletal muscle actin molecule from arthritis mice and RA patients. Moreover, molecular dynamic simulations revealed that these areas, here coined "hotspots", are important for the stability of the actin molecule and its capacity to generate filaments and interact with myosin. Together, these data demonstrate how oxidative modifications on actin promote muscle weakness in RA patients and provide novel leads for targeted therapeutic treatment to improve muscle function.
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Affiliation(s)
- Maarten M Steinz
- Department of Physiology and Pharmacology, Molecular Muscle Physiology and Pathophysiology, Karolinska Institutet, Stockholm, Sweden
| | - Malin Persson
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Bejan Aresh
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Karl Olsson
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Stockholm, Sweden
| | - Arthur J Cheng
- Department of Physiology and Pharmacology, Molecular Muscle Physiology and Pathophysiology, Karolinska Institutet, Stockholm, Sweden
| | - Emma Ahlstrand
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Mats Lilja
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Stockholm, Sweden
| | - Tommy R Lundberg
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Stockholm, Sweden
| | - Eric Rullman
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Stockholm, Sweden
| | | | - Katalin Sandor
- Department of Physiology and Pharmacology, Center for Molecular Medicine, and
| | - Sofia Ajeganova
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Takashi Yamada
- Department of Physical Therapy, Sapporo Medical University, Sapporo, Japan
| | - Nicole Beard
- Faculty of Science and Technology, University of Canberra, Australia
| | - Björn Cg Karlsson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Pasi Tavi
- Department of Physiology and Pharmacology, Molecular Muscle Physiology and Pathophysiology, Karolinska Institutet, Stockholm, Sweden.,A.I. Virtanen Institute, University of Eastern Finland, Kuopio, Finland
| | - Ellinor Kenne
- Department of Physiology and Pharmacology, Molecular Muscle Physiology and Pathophysiology, Karolinska Institutet, Stockholm, Sweden
| | - Camilla I Svensson
- Department of Physiology and Pharmacology, Center for Molecular Medicine, and
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Roger Karlsson
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Ran Friedman
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Thomas Gustafsson
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Stockholm, Sweden
| | - Johanna T Lanner
- Department of Physiology and Pharmacology, Molecular Muscle Physiology and Pathophysiology, Karolinska Institutet, Stockholm, Sweden
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25
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Bagni MA, Colombini B, Nocella M, Pregno C, S Cornachione A, Rassier DE. The effects of fatigue and oxidation on contractile function of intact muscle fibers and myofibrils isolated from the mouse diaphragm. Sci Rep 2019; 9:4422. [PMID: 30872655 PMCID: PMC6418105 DOI: 10.1038/s41598-019-39353-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 01/18/2019] [Indexed: 11/09/2022] Open
Abstract
The goal of this study was to investigate the effects of repetitive stimulation and the oxidant H2O2 on fatigue of diaphragm intact fibers and in myofibrils measured with different Ca2+ concentrations. Intact fibers were isolated from mice diaphragm, and twitch and tetanic contractions (500 ms duration) were performed at different frequencies of stimulation ranging from 15 Hz to 150 Hz to establish a force-frequency relation before and after a fatigue and recovery protocol, without or after a treatment with H2O2. Fatigue was induced with isometric contractions (500 ms, 40 Hz) evoked every 0.8 seconds, with a total of 625 tetani. After the fatigue, the force recovery was followed by invoking tetanic contractions (500 ms, 40 Hz) every 1 min, with a total duration of 30 min. Individual myofibrils were also isolated from the mouse diaphragm and were tested for isometric contractions before and after treatment with H2O2 and NAC. In a second series of experiments, myofibrils were activated at different pCa (pCa = -log10 [Ca2+]), before and after H2O2 treatment. After 15 minutes of H2O2 treatment, the myofibrillar force was decreased to 54 ± 12% of its control, maximal value, and a result that was reversed by NAC treatment. The force was also decreased after myofibrils were treated with H2O2 and activated in pCa ranging between 4.5 and 5.7. These results suggest that fatigue in diaphragm intact fibers and at the myofibrils level is caused partially by oxidation of the contractile proteins that may be responsible for changing the force in various levels of Ca2+ activation.
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Affiliation(s)
- M Angela Bagni
- Dept Experimental and Clinical Medicine, University of Firenze, Florence, Italy
| | - Barbara Colombini
- Dept Experimental and Clinical Medicine, University of Firenze, Florence, Italy
| | - Marta Nocella
- Dept Experimental and Clinical Medicine, University of Firenze, Florence, Italy
| | - Claudio Pregno
- Dept Experimental and Clinical Medicine, University of Firenze, Florence, Italy
| | - Anabelle S Cornachione
- Dept Kinesiology and Physical Education, Faculty of Education, McGill University, Montreal, Canada
| | - Dilson E Rassier
- Dept Kinesiology and Physical Education, Faculty of Education, McGill University, Montreal, Canada.
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26
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Abstract
The cytoskeleton drives many essential processes in normal physiology, and its impairments underlie many diseases, including skeletal myopathies, cancer, and heart failure, that broadly affect developed countries worldwide. Cytoskeleton regulation is a field of investigation of rapidly emerging global importance and a new venue for the development of potential therapies. This review overviews our present understanding of the posttranslational regulation of the muscle cytoskeleton through arginylation, a tRNA-dependent addition of arginine to proteins mediated by arginyltransferase 1. We focus largely on arginylation-dependent regulation of striated muscles, shown to play critical roles in facilitating muscle integrity, contractility, regulation, and strength.
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Affiliation(s)
- Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University , Montreal, Quebec , Canada
| | - Anna Kashina
- Department of Biomedical Sciences, University of Pennsylvania , Philadelphia, Pennsylvania
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27
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Abstract
Cyclic interactions between myosin II motor domains and actin filaments that are powered by turnover of ATP underlie muscle contraction and have key roles in motility of nonmuscle cells. The elastic characteristics of actin-myosin cross-bridges are central in the force-generating process, and disturbances in these properties may lead to disease. Although the prevailing paradigm is that the cross-bridge elasticity is linear (Hookean), recent single-molecule studies suggest otherwise. Despite convincing evidence for substantial nonlinearity of the cross-bridge elasticity in the single-molecule work, this finding has had limited influence on muscle physiology and physiology of other ordered cellular actin-myosin ensembles. Here, we use a biophysical modeling approach to close the gap between single molecules and physiology. The model is used for analysis of available experimental results in the light of possible nonlinearity of the cross-bridge elasticity. We consider results obtained both under rigor conditions (in the absence of ATP) and during active muscle contraction. Our results suggest that a wide range of experimental findings from mechanical experiments on muscle cells are consistent with nonlinear actin-myosin elasticity similar to that previously found in single molecules. Indeed, the introduction of nonlinear cross-bridge elasticity into the model improves the reproduction of key experimental results and eliminates the need for force dependence of the ATP-induced detachment rate, consistent with observations in other single-molecule studies. The findings have significant implications for the understanding of key features of actin-myosin-based production of force and motion in living cells, particularly in muscle, and for the interpretation of experimental results that rely on stiffness measurements on cells or myofibrils.
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Affiliation(s)
- Alf Månsson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden.
| | - Malin Persson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden; Department of Kinesiology and Physical Education, McGill University, Montreal, Canada; Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Nabil Shalabi
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
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28
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Cheng YS, Matusovskiy OS, Rassier DE. Cleavage of loops 1 and 2 in skeletal muscle heavy meromyosin (HMM) leads to a decreased function. Arch Biochem Biophys 2018; 661:168-177. [PMID: 30465737 DOI: 10.1016/j.abb.2018.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/31/2018] [Accepted: 11/04/2018] [Indexed: 11/26/2022]
Abstract
BACKGROUND The mechanical work and the actin-activated ATP kinetics in skeletal muscles are closely associated with two surface loops that are present in the myosin molecule: loop 1 and loop 2. They are located close to the ATP-loop (loop 1), and the actin binding domain (loop 2). In this study we investigated the roles of loops 1 and 2 in the regulation of the load-dependent velocity of actin sliding and ATPase activity. METHODS Heavy meromyosin (HMM) from rabbit skeletal muscle was subjected to limited tryptic proteolysis to obtain fragments containing different amounts of loops 1 and 2. The amino-acid sequences of these fragments were confirmed with quantitative mass-spectrometry. The velocity of actin motility propelled by the HMM fragments was measured using in-vitro motility assays, with varying loads induced by the addition of different concentrations of α-actinin. RESULTS The load-dependent velocity of the myosin-propelled actin motility, and the fraction of actin filaments motility, were decreased in close association with the depletion of loop 1 in the HMM. The ATPase activity was decreased in close association with depletion of loops 1 and 2. CONCLUSIONS Loop 1 is responsible for regulating the load-dependent velocity of actin motility. GENERAL SIGNIFICANCE Myosin-actin interaction is closely regulated by two flexible loops in the structure of myosin. The results of this study are important for the understanding of the molecular mechanisms of contraction, and therefore the most basic functions of life, such as locomotion, heart beating, and breathing.
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Affiliation(s)
- Yu-Shu Cheng
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Oleg S Matusovskiy
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada.
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29
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Affiliation(s)
- Felipe de Souza Leite
- 1Department of Kinesiology and Physical Education, Physics and Physiology, McGill University, Montreal, Quebec, Canada; and 2Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA
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30
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Joureau B, de Winter JM, Conijn S, Bogaards SJP, Kovacevic I, Kalganov A, Persson M, Lindqvist J, Stienen GJM, Irving TC, Ma W, Yuen M, Clarke NF, Rassier DE, Malfatti E, Romero NB, Beggs AH, Ottenheijm CAC. Dysfunctional sarcomere contractility contributes to muscle weakness in ACTA1-related nemaline myopathy (NEM3). Ann Neurol 2018; 83:269-282. [PMID: 29328520 DOI: 10.1002/ana.25144] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 01/10/2018] [Accepted: 01/10/2018] [Indexed: 01/23/2023]
Abstract
OBJECTIVE Nemaline myopathy (NM) is one of the most common congenital nondystrophic myopathies and is characterized by muscle weakness, often from birth. Mutations in ACTA1 are a frequent cause of NM (ie, NEM3). ACTA1 encodes alpha-actin 1, the main constituent of the sarcomeric thin filament. The mechanisms by which mutations in ACTA1 contribute to muscle weakness in NEM3 are incompletely understood. We hypothesized that sarcomeric dysfunction contributes to muscle weakness in NEM3 patients. METHODS To test this hypothesis, we performed contractility measurements in individual muscle fibers and myofibrils obtained from muscle biopsies of 14 NEM3 patients with different ACTA1 mutations. To identify the structural basis for impaired contractility, low angle X-ray diffraction and stimulated emission-depletion microscopy were applied. RESULTS Our findings reveal that muscle fibers of NEM3 patients display a reduced maximal force-generating capacity, which is caused by dysfunctional sarcomere contractility in the majority of patients, as revealed by contractility measurements in myofibrils. Low angle X-ray diffraction and stimulated emission-depletion microscopy indicate that dysfunctional sarcomere contractility in NEM3 patients involves a lower number of myosin heads binding to actin during muscle activation. This lower number is not the result of reduced thin filament length. Interestingly, the calcium sensitivity of force is unaffected in some patients, but decreased in others. INTERPRETATION Dysfunctional sarcomere contractility is an important contributor to muscle weakness in the majority of NEM3 patients. This information is crucial for patient stratification in future clinical trials. Ann Neurol 2018;83:269-282.
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Affiliation(s)
- Barbara Joureau
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | | | - Stefan Conijn
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | - Sylvia J P Bogaards
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | - Igor Kovacevic
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | - Albert Kalganov
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Malin Persson
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada.,Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Johan Lindqvist
- Department of Molecular and Cellular Biology and Molecular Cardiovascular Research Program, University of Arizona, Tucson, AZ
| | - Ger J M Stienen
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | - Thomas C Irving
- Biophysics Collaborative Access Team, Center for Synchrotron Radiation Research and Instrumentation, and Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL
| | - Weikang Ma
- Biophysics Collaborative Access Team, Center for Synchrotron Radiation Research and Instrumentation, and Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL
| | - Michaela Yuen
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands.,Institute for Neuroscience and Muscle Research, Children's Hospital at Westmead, Westmead, New South Wales, Australia.,Discipline of Pediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
| | - Nigel F Clarke
- Institute for Neuroscience and Muscle Research, Children's Hospital at Westmead, Westmead, New South Wales, Australia.,Discipline of Pediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Edoardo Malfatti
- Pierre and Marie Curie University/University of Paris VI, Sorbonne Universities, National Institute of Health and Medical Research UMRS974, National Center for Scientific Research FRE3617, Center for Research in Myology, Pitié-Salpêtrière Hospital Group, Paris, France
| | - Norma B Romero
- Pierre and Marie Curie University/University of Paris VI, Sorbonne Universities, National Institute of Health and Medical Research UMRS974, National Center for Scientific Research FRE3617, Center for Research in Myology, Pitié-Salpêtrière Hospital Group, Paris, France
| | - Alan H Beggs
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Coen A C Ottenheijm
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands.,Department of Molecular and Cellular Biology and Molecular Cardiovascular Research Program, University of Arizona, Tucson, AZ
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31
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Shalabi N, Persson M, Månsson A, Vengallatore S, Rassier DE. Sarcomere Stiffness during Stretching and Shortening of Rigor Skeletal Myofibrils. Biophys J 2018; 113:2768-2776. [PMID: 29262369 PMCID: PMC5770557 DOI: 10.1016/j.bpj.2017.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 08/30/2017] [Accepted: 10/05/2017] [Indexed: 11/20/2022] Open
Abstract
In this study, we measured the stiffness of skeletal muscle myofibrils in rigor. Using a custom-built atomic force microscope, myofibrils were first placed in a rigor state then stretched and shortened at different displacements (0.1–0.3 μm per sarcomere) and nominal speeds (0.4 and 0.8 μm/s). During stretching, the myofibril stiffness was independent of both displacement and speed (average of 987 nN/μm). During shortening, the myofibril stiffness was independent of displacement, but dependent on speed (1234 nN/μm at 0.4 μm/s; 1106 nN/μm at 0.8 μm/s). Furthermore, the myofibril stiffness during shortening was greater than that during stretching and the difference depended on speed (31% at 0.4 μm/s; 8% at 0.8 μm/s). The results suggest that the myofibrils exhibit nonlinear viscoelastic properties that may be derived from myofibril filaments, similar to what has been observed in muscle fibers.
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Affiliation(s)
- Nabil Shalabi
- Department of Mechanical Engineering, McGill University, Montreal, Québec, Canada; Department of Kinesiology and Physical Education, McGill University, Montreal, Québec, Canada
| | - Malin Persson
- Department of Kinesiology and Physical Education, McGill University, Montreal, Québec, Canada; Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden; Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Alf Månsson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Srikar Vengallatore
- Department of Mechanical Engineering, McGill University, Montreal, Québec, Canada
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Québec, Canada.
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32
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Kamandulis S, de Souza Leite F, Hernández A, Katz A, Brazaitis M, Bruton JD, Venckunas T, Masiulis N, Mickeviciene D, Eimantas N, Subocius A, Rassier DE, Skurvydas A, Ivarsson N, Westerblad H. Prolonged force depression after mechanically demanding contractions is largely independent of Ca 2+ and reactive oxygen species. FASEB J 2017; 31:4809-4820. [PMID: 28716970 DOI: 10.1096/fj.201700019r] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/05/2017] [Indexed: 12/21/2022]
Abstract
Increased production of reactive oxygen/nitrogen species (ROS) and impaired cellular Ca2+ handling are implicated in the prolonged low-frequency force depression (PLFFD) observed in skeletal muscle after both metabolically and mechanically demanding exercise. Metabolically demanding high-intensity exercise can induce PLFFD accompanied by ROS-dependent fragmentation of the sarcoplasmic reticulum Ca2+ release channels, the ryanodine receptor 1s (RyR1s). We tested whether similar changes occur after mechanically demanding eccentric contractions. Human subjects performed 100 repeated drop jumps, which require eccentric knee extensor contractions upon landing. This exercise caused a major PLFFD, such that maximum voluntary and electrically evoked forces did not recover within 24 h. Drop jumps induced only minor signs of increased ROS, and RyR1 fragmentation was observed in only 3 of 7 elderly subjects. Also, isolated mouse muscle preparations exposed to drop-jump-mimicking eccentric contractions showed neither signs of increased ROS nor RyR1 fragmentation. Still, the free cytosolic [Ca2+] during tetanic contractions was decreased by ∼15% 1 h after contractions, which can explain the exaggerated force decrease at low-stimulation frequencies but not the major frequency-independent force depression. In conclusion, PLFFD caused by mechanically demanding eccentric contractions does not involve any major increase in ROS or RyR1 fragmentation.-Kamandulis, S., de Souza Leite, F., Hernandez, A., Katz, A., Brazaitis, M., Bruton, J. D., Venckunas, T., Masiulis, N., Mickeviciene, D., Eimantas, N., Subocius, A., Rassier, D. E., Skurvydas, A., Ivarsson, N., Westerblad, H. Prolonged force depression after mechanically demanding contractions is largely independent of Ca2+ and reactive oxygen species.
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Affiliation(s)
- Sigitas Kamandulis
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Felipe de Souza Leite
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Andres Hernández
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Abram Katz
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Marius Brazaitis
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Joseph D Bruton
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Tomas Venckunas
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Nerijus Masiulis
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Dalia Mickeviciene
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Nerijus Eimantas
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Andrejus Subocius
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania.,Department of Surgery, Kaunas Clinical Hospital, Kaunas, Lithuania; and.,Clinic of Surgery, Republican Hospital of Kaunas, Kaunas, Lithuania
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Albertas Skurvydas
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Niklas Ivarsson
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Håkan Westerblad
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania; .,Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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33
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Rassier DE. Sarcomere mechanics in striated muscles: from molecules to sarcomeres to cells. Am J Physiol Cell Physiol 2017; 313:C134-C145. [PMID: 28539306 DOI: 10.1152/ajpcell.00050.2017] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 05/22/2017] [Accepted: 05/22/2017] [Indexed: 11/22/2022]
Abstract
Muscle contraction is commonly associated with the cross-bridge and sliding filament theories, which have received strong support from experiments conducted over the years in different laboratories. However, there are studies that cannot be readily explained by the theories, showing 1) a plateau of the force-length relation extended beyond optimal filament overlap, and forces produced at long sarcomere lengths that are higher than those predicted by the sliding filament theory; 2) passive forces at long sarcomere lengths that can be modulated by activation and Ca2+, which changes the force-length relation; and 3) an unexplained high force produced during and after stretch of activated muscle fibers. Some of these studies even propose "new theories of contraction." While some of these observations deserve evaluation, many of these studies present data that lack a rigorous control and experiments that cannot be repeated in other laboratories. This article reviews these issues, looking into studies that have used intact and permeabilized fibers, myofibrils, isolated sarcomeres, and half-sarcomeres. A common mechanism associated with sarcomere and half-sarcomere length nonuniformities and a Ca2+-induced increase in the stiffness of titin is proposed to explain observations that derive from these studies.
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Affiliation(s)
- Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
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34
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Shalabi N, Cornachione A, de Souza Leite F, Vengallatore S, Rassier DE. Residual force enhancement is regulated by titin in skeletal and cardiac myofibrils. J Physiol 2017; 595:2085-2098. [PMID: 28028799 DOI: 10.1113/jp272983] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 12/12/2016] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS When a skeletal muscle is stretched while it contracts, the muscle produces a relatively higher force than the force from an isometric contraction at the same length: a phenomenon referred to as residual force enhancement. Residual force enhancement is puzzling because it cannot be directly explained by the classical force-length relationship and the sliding filament theory of contraction, the main paradigms in the muscle field. We used custom-built instruments to measure residual force enhancement in skeletal myofibrils, and, for the first time, in cardiac myofibrils. Our data report that residual force enhancement is present in skeletal muscles, but not cardiac muscles, and is regulated by the different isoforms of the titin protein filaments. ABSTRACT When a skeletal muscle contracts isometrically, the muscle produces a force that is relative to the final isometric sarcomere length (SL). However, when the same final SL is reached by stretching the muscle while it contracts, the muscle produces a relatively higher force: a phenomenon commonly referred to as residual force enhancement. In this study, we investigated residual force enhancement in rabbit skeletal psoas myofibrils and, for the first time, cardiac papillary myofibrils. A custom-built atomic force microscope was used in experiments that stretched myofibrils before and after inhibiting myosin and actin interactions to determine whether the different cardiac and skeletal titin isoforms regulate residual force enhancement. At SLs ranging from 2.24 to 3.13 μm, the skeletal myofibrils enhanced the force by an average of 9.0%, and by 29.5% after hindering myosin and actin interactions. At SLs ranging from 1.80 to 2.29 μm, the cardiac myofibrils did not enhance the force before or after hindering myosin and actin interactions. We conclude that residual force enhancement is present only in skeletal muscles and is dependent on the titin isoforms.
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Affiliation(s)
- Nabil Shalabi
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montreal, Quebec, Canada, H3A 2K6
| | - Anabelle Cornachione
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Avenue West, Montreal, Quebec, Canada, H2W 1S4
| | - Felipe de Souza Leite
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Avenue West, Montreal, Quebec, Canada, H2W 1S4
| | - Srikar Vengallatore
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montreal, Quebec, Canada, H3A 2K6
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Avenue West, Montreal, Quebec, Canada, H2W 1S4
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35
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de Souza Leite F, Rassier DE. Sarcomere and Inter-Sarcomere Dynamics within Skeletal Muscle Myofibrils. Biophys J 2017. [DOI: 10.1016/j.bpj.2016.11.1008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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36
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Rassier DE. Reply to "Letter to the editor: Comments on Cornachione et al. (2016): "The increase in non-cross-bridge forces after stretch of activated striated muscle is related to titin isoforms". Am J Physiol Cell Physiol 2016; 311:C160-1. [PMID: 27413181 DOI: 10.1152/ajpcell.00159.2016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
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37
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Rassier DE, Minozzo FC. Length-dependent Ca2+ activation in skeletal muscle fibers from mammalians. Am J Physiol Cell Physiol 2016; 311:C201-11. [PMID: 27225655 DOI: 10.1152/ajpcell.00046.2016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 05/23/2016] [Indexed: 11/22/2022]
Abstract
We tested the hypotheses that 1) a decrease in activation of skeletal muscles at short sarcomere lengths (SLs) is caused by an inhibition of Ca(2+) release from the sarcoplasmic reticulum (SR), and 2) the decrease in Ca(2+) would be caused by an inhibition of action potential conduction from the periphery to the core of the fibers. Intact, single fibers dissected from the flexor digitorum brevis from mice were activated at different SLs, and intracellular Ca(2+) was imaged with confocal microscopy. Force decreased at SLs shorter than 2.1 μm, while Ca(2+) concentration decreased at SLs below 1.9 μm. The concentration of Ca(2+) at short SL was lower at the core than at the peripheries of the fiber. When the external concentration of Na(+) was decreased in the experimental media, impairing action potential conduction, Ca(2+) gradients were observed in all SLs. When caffeine was used in the experimental media, the gradients of Ca(2+) were abolished. We concluded that there is an inhibition of Ca(2+) release from the sarcoplasmic reticulum (SR) at short SLs, which results from a decreased conduction of action potential from the periphery to the core of the fibers.
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Affiliation(s)
- Dilson E Rassier
- Departments of Kinesiology and Physical Education, McGill University, Montreal, Canada; Department of Physics, McGill University, Montreal Canada; Department of Physiology, McGill University, Montreal, Canada; and
| | - Fábio C Minozzo
- Departments of Kinesiology and Physical Education, McGill University, Montreal, Canada; McGill Health Centre Research Institute, Montreal, Canada
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Affiliation(s)
- Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
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Hussain SNA, Cornachione AS, Guichon C, Al Khunaizi A, de Souza Leite F, Petrof BJ, Mofarrahi M, Moroz N, de Varennes B, Goldberg P, Rassier DE. Prolonged controlled mechanical ventilation in humans triggers myofibrillar contractile dysfunction and myofilament protein loss in the diaphragm. Thorax 2016; 71:436-45. [DOI: 10.1136/thoraxjnl-2015-207559] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 01/06/2016] [Indexed: 12/16/2022]
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Cheng AJ, Yamada T, Rassier DE, Andersson DC, Westerblad H, Lanner JT. Reactive oxygen/nitrogen species and contractile function in skeletal muscle during fatigue and recovery. J Physiol 2016; 594:5149-60. [PMID: 26857536 DOI: 10.1113/jp270650] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 12/23/2015] [Indexed: 01/17/2023] Open
Abstract
The production of reactive oxygen/nitrogen species (ROS/RNS) is generally considered to increase during physical exercise. Nevertheless, direct measurements of ROS/RNS often show modest increases in ROS/RNS in muscle fibres even during intensive fatiguing stimulation, and the major source(s) of ROS/RNS during exercise is still being debated. In rested muscle fibres, mild and acute exposure to exogenous ROS/RNS generally increases myofibrillar submaximal force, whereas stronger or prolonged exposure has the opposite effect. Endogenous production of ROS/RNS seems to preferentially decrease submaximal force and positive effects of antioxidants are mainly observed during fatigue induced by submaximal contractions. Fatigued muscle fibres frequently enter a prolonged state of reduced submaximal force, which is caused by a ROS/RNS-dependent decrease in sarcoplasmic reticulum Ca(2+) release and/or myofibrillar Ca(2+) sensitivity. Increased ROS/RNS production during exercise can also be beneficial and recent human and animal studies show that antioxidant supplementation can hamper the beneficial effects of endurance training. In conclusion, increased ROS/RNS production have both beneficial and detrimental effects on skeletal muscle function and the outcome depends on a combination of factors: the type of ROS/RNS; the magnitude, duration and location of ROS/RNS production; and the defence systems, including both endogenous and exogenous antioxidants.
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Affiliation(s)
| | | | - Dilson E Rassier
- McGill University, 475 Pine Avenue West, Montreal, QC, Canada, H2W1S4
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Power GA, Minozzo FC, Spendiff S, Filion ME, Konokhova Y, Purves-Smith MF, Pion C, Aubertin-Leheudre M, Morais JA, Herzog W, Hepple RT, Taivassalo T, Rassier DE. Reduction in single muscle fiber rate of force development with aging is not attenuated in world class older masters athletes. Am J Physiol Cell Physiol 2015; 310:C318-27. [PMID: 26632598 DOI: 10.1152/ajpcell.00289.2015] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 11/20/2015] [Indexed: 12/25/2022]
Abstract
Normal adult aging is associated with impaired muscle contractile function; however, to what extent cross-bridge kinetics are altered in aging muscle is not clear. We used a slacken restretch maneuver on single muscle fiber segments biopsied from the vastus lateralis of young adults (∼23 yr), older nonathlete (NA) adults (∼80 yr), and age-matched world class masters athletes (MA; ∼80 yr) to assess the rate of force redevelopment (ktr) and cross-bridge kinetics. A post hoc analysis was performed, and only the mechanical properties of "slow type" fibers based on unloaded shortening velocity (Vo) measurements are reported. The MA and NA were ∼54 and 43% weaker, respectively, for specific force compared with young. Similarly, when force was normalized to cross-sectional area determined via the fiber shape angularity data, both old groups did not differ, and the MA and NA were ∼43 and 48% weaker, respectively, compared with young (P < 0.05). Vo for both MA and NA old groups was 62 and 46% slower, respectively, compared with young. Both MA and NA adults had approximately two times slower values for ktr compared with young. The slower Vo in both old groups relative to young, coupled with a similarly reduced ktr, suggests impaired cross-bridge kinetics are responsible for impaired single fiber contractile properties with aging. These results challenge the widely accepted resilience of slow type fibers to cellular aging.
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Affiliation(s)
- Geoffrey A Power
- Department of Human Health and Nutritional Sciences, College of Biological Sciences, University of Guelph, Guelph, Ontario, Canada; Faculty of Kinesiology, Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada;
| | - Fábio C Minozzo
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada; The Muscle Physiology and Biophysics Laboratory, McGill University, Montreal, Quebec, Canada
| | - Sally Spendiff
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Marie-Eve Filion
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Yana Konokhova
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Maddy F Purves-Smith
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Charlotte Pion
- Département de Kinanthropologie, Université du Québec a' Montréal, Montreal, Quebec, Canada
| | | | - José A Morais
- Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Walter Herzog
- Faculty of Kinesiology, Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada
| | - Russell T Hepple
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada; Department of Medicine, McGill University, Montreal, Quebec, Canada; Meakins Christie Laboratories, McGill University, Montreal, Quebec, Canada; and
| | - Tanja Taivassalo
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada; The Muscle Physiology and Biophysics Laboratory, McGill University, Montreal, Quebec, Canada; Meakins Christie Laboratories, McGill University, Montreal, Quebec, Canada; and Department of Physics, McGill University, Montreal, Quebec, Canada
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Leite FS, Minozzo FC, Kalganov A, Cornachione AS, Cheng YS, Leu NA, Han X, Saripalli C, Yates JR, Granzier H, Kashina AS, Rassier DE. Reduced passive force in skeletal muscles lacking protein arginylation. Am J Physiol Cell Physiol 2015; 310:C127-35. [PMID: 26511365 DOI: 10.1152/ajpcell.00269.2015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 10/28/2015] [Indexed: 11/22/2022]
Abstract
Arginylation is a posttranslational modification that plays a global role in mammals. Mice lacking the enzyme arginyltransferase in skeletal muscles exhibit reduced contractile forces that have been linked to a reduction in myosin cross-bridge formation. The role of arginylation in passive skeletal myofibril forces has never been investigated. In this study, we used single sarcomere and myofibril measurements and observed that lack of arginylation leads to a pronounced reduction in passive forces in skeletal muscles. Mass spectrometry indicated that skeletal muscle titin, the protein primarily linked to passive force generation, is arginylated on five sites located within the A band, an important area for protein-protein interactions. We propose a mechanism for passive force regulation by arginylation through modulation of protein-protein binding between the titin molecule and the thick filament. Key points are as follows: 1) active and passive forces were decreased in myofibrils and single sarcomeres isolated from muscles lacking arginyl-tRNA-protein transferase (ATE1). 2) Mass spectrometry revealed five sites for arginylation within titin molecules. All sites are located within the A-band portion of titin, an important region for protein-protein interactions. 3) Our data suggest that arginylation of titin is required for proper passive force development in skeletal muscles.
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Affiliation(s)
- Felipe S Leite
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Fábio C Minozzo
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Albert Kalganov
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Anabelle S Cornachione
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Yu-Shu Cheng
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Nicolae A Leu
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Xuemei Han
- The Scripps Research Institute, Department of Chemical Physiology, La Jolla, California
| | - Chandra Saripalli
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona; and
| | - John R Yates
- The Scripps Research Institute, Department of Chemical Physiology, La Jolla, California
| | - Henk Granzier
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona; and
| | - Anna S Kashina
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada; Departments of Physics and Physiology, McGill University, Montreal, Quebec, Canada
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Cornachione AS, Leite F, Bagni MA, Rassier DE. The increase in non-cross-bridge forces after stretch of activated striated muscle is related to titin isoforms. Am J Physiol Cell Physiol 2015; 310:C19-26. [PMID: 26405100 DOI: 10.1152/ajpcell.00156.2015] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 09/18/2015] [Indexed: 02/01/2023]
Abstract
Skeletal muscles present a non-cross-bridge increase in sarcomere stiffness and tension on Ca(2+) activation, referred to as static stiffness and static tension, respectively. It has been hypothesized that this increase in tension is caused by Ca(2+)-dependent changes in the properties of titin molecules. To verify this hypothesis, we investigated the static tension in muscles containing different titin isoforms. Permeabilized myofibrils were isolated from the psoas, soleus, and heart ventricle from the rabbit, and tested in pCa 9.0 and pCa 4.5, before and after extraction of troponin C, thin filaments, and treatment with the actomyosin inhibitor blebbistatin. The myofibrils were tested with stretches of different amplitudes in sarcomere lengths varying between 1.93 and 3.37 μm for the psoas, 2.68 and 4.21 μm for the soleus, and 1.51 and 2.86 μm for the ventricle. Using gel electrophoresis, we confirmed that the three muscles tested have different titin isoforms. The static tension was present in psoas and soleus myofibrils, but not in ventricle myofibrils, and higher in psoas myofibrils than in soleus myofibrils. These results suggest that the increase in the static tension is directly associated with Ca(2+)-dependent change in titin properties and not associated with changes in titin-actin interactions.
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Affiliation(s)
| | - Felipe Leite
- Department of Kinesiology and Physical Education, McGill McGill University, Montreal, Quebec, Canada; and
| | - Maria Angela Bagni
- Dipartimento di Medicina Sperimentale e Clinica, Scienze Fisiologiche, University of Florence, Florence, Italy
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill McGill University, Montreal, Quebec, Canada; and
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Minozzo FC, Altman D, Rassier DE. MgADP activation contributes to force enhancement during fast stretch of isolated skeletal myofibrils. Biochem Biophys Res Commun 2015; 463:1129-34. [PMID: 26095850 DOI: 10.1016/j.bbrc.2015.06.070] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 06/08/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND When an activated muscle is rapidly stretched, force rises and peaks while muscle lengthens. The peak force is normally called critical-force (Pc). The mechanism behind this increase in force is not well understood, but it has been associated with crossbridges operating in different states. METHODS Myofibrils were attached between a cantilever and a micro-needle, and activated with Ca(2+) or MgADP. During activation, the myofibrils were stretched by 3% SLo at 10 SLo·s(-1). A crossbridge model was developed to better understand the effects of MgADP in myofibrils activation. RESULTS Despite a similar stretch magnitude, MgADP activation produced a higher Pc (1.37 ± 0.07 P/Po) than Ca(2+) activation (Pc = 1.23 ± 0.03 P/Po). These results suggest that myofibrils activated with MgADP become stiffer than myofibrils activated with Ca(2+). CONCLUSIONS MgADP induces a fraction of crossbridges to form a "rigor-like" state that precedes ADP release, and that may not contribute to isometric forces. Such interpretation was strengthened by the results obtained with the developed crossbridge model, which showed that MgADP bias crossbridges into the rigor-like state. This state would be crucial to initiate a cooperative activation of crossbridges and actin, and to resist to unbinding from actin when the myofibrils are stretched. SIGNIFICANCE Our results suggest a new mechanism contributing for force output during stretch, which underlies basic mechanisms of muscle contraction.
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Affiliation(s)
- Fábio C Minozzo
- Department of Kinesiology and Physical Education, McGill University, Canada
| | - David Altman
- Department of Physics, Willamette University, Salem, OR, USA
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Canada; Department of Physics, McGill University, Canada; Department of Physiology, McGill University, Canada.
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Minozzo FC, Power GA, Filion ME, Konokhova Y, Morais JA, Aubertln-Leheudre M, Pion C, Hepple RT, Rassier DE, Taivassalo T. Cross-bridge Kinetics Impairment In Elite Octogenarian Masters Athletes. Med Sci Sports Exerc 2015. [DOI: 10.1249/01.mss.0000479074.42784.6d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Philippou A, Minozzo FC, Spinazzola JM, Smith LR, Lei H, Rassier DE, Barton ER. Masticatory muscles of mouse do not undergo atrophy in space. FASEB J 2015; 29:2769-79. [PMID: 25795455 DOI: 10.1096/fj.14-267336] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 03/02/2015] [Indexed: 02/06/2023]
Abstract
Muscle loading is important for maintaining muscle mass; when load is removed, atrophy is inevitable. However, in clinical situations such as critical care myopathy, masticatory muscles do not lose mass. Thus, their properties may be harnessed to preserve mass. We compared masticatory and appendicular muscles responses to microgravity, using mice aboard the space shuttle Space Transportation System-135. Age- and sex-matched controls remained on the ground. After 13 days of space flight, 1 masseter (MA) and tibialis anterior (TA) were frozen rapidly for biochemical and functional measurements, and the contralateral MA was processed for morphologic measurements. Flight TA muscles exhibited 20 ± 3% decreased muscle mass, 2-fold decreased phosphorylated (P)-Akt, and 4- to 12-fold increased atrogene expression. In contrast, MAs had no significant change in mass but a 3-fold increase in P-focal adhesion kinase, 1.5-fold increase in P-Akt, and 50-90% lower atrogene expression compared with limb muscles, which were unaltered in microgravity. Myofibril force measurements revealed that microgravity caused a 3-fold decrease in specific force and maximal shortening velocity in TA muscles. It is surprising that myofibril-specific force from both control and flight MAs were similar to flight TA muscles, yet power was compromised by 40% following flight. Continued loading in microgravity prevents atrophy, but masticatory muscles have a different set point that mimics disuse atrophy in the appendicular muscle.
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Affiliation(s)
- Anastassios Philippou
- *Department of Physiology, Medical School, National and Kapodistrian University of Athens, Goudi-Athens, Greece; Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Kinesiology, McGill University, Montreal, Quebec, Canada; Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Fabio C Minozzo
- *Department of Physiology, Medical School, National and Kapodistrian University of Athens, Goudi-Athens, Greece; Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Kinesiology, McGill University, Montreal, Quebec, Canada; Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Janelle M Spinazzola
- *Department of Physiology, Medical School, National and Kapodistrian University of Athens, Goudi-Athens, Greece; Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Kinesiology, McGill University, Montreal, Quebec, Canada; Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Lucas R Smith
- *Department of Physiology, Medical School, National and Kapodistrian University of Athens, Goudi-Athens, Greece; Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Kinesiology, McGill University, Montreal, Quebec, Canada; Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Hanqin Lei
- *Department of Physiology, Medical School, National and Kapodistrian University of Athens, Goudi-Athens, Greece; Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Kinesiology, McGill University, Montreal, Quebec, Canada; Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Dilson E Rassier
- *Department of Physiology, Medical School, National and Kapodistrian University of Athens, Goudi-Athens, Greece; Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Kinesiology, McGill University, Montreal, Quebec, Canada; Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Elisabeth R Barton
- *Department of Physiology, Medical School, National and Kapodistrian University of Athens, Goudi-Athens, Greece; Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Kinesiology, McGill University, Montreal, Quebec, Canada; Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
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Trecarten N, Minozzo FC, Leite FS, Rassier DE. Shortening-Induced Force Depression in Single Sarcomeres is Abolished by MgADP-Activation. Biophys J 2015. [DOI: 10.1016/j.bpj.2014.11.1846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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de Souza Leite F, Minozzo FC, Trecarten N, Han X, Yates JR, Kashina A, Rassier DE. Passive Force Analysis of Single Sarcomeres from Muscles Lacking Arginyl-tRNA-Protein Transferase (Ate1). Biophys J 2015. [DOI: 10.1016/j.bpj.2014.11.3219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Rassier DE, Leite FS, Nocella M, Cornachione AS, Colombini B, Bagni MA. Non-crossbridge forces in activated striated muscles: a titin dependent mechanism of regulation? J Muscle Res Cell Motil 2014; 36:37-45. [PMID: 25421125 DOI: 10.1007/s10974-014-9397-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 10/29/2014] [Indexed: 11/30/2022]
Abstract
When skeletal muscles are stretched during activation in the absence of myosin-actin interactions, the force increases significantly. The force remains elevated throughout the activation period. The mechanism behind this non-crossbridge force, referred to as static tension, is unknown and generates debate in the literature. It has been suggested that the static tension is caused by Ca(2+)-induced changes in the properties of titin molecules that happens during activation and stretch, but a comprehensive evaluation of such possibility is still lacking. This paper reviews the general characteristics of the static tension, and evaluates the proposed mechanism by which titin may change the force upon stretch. Evidence is presented suggesting that an increase in intracellular Ca(2+) concentration leads to Ca(2+) binding to the PEVK region of titin. Such binding increases titin stiffness, which increases the overall sarcomere stiffness and causes the static tension. If this form of Ca(2+)-induced increase in titin stiffness is confirmed in future studies, it may have large implications for understating of the basic mechanisms of muscle contraction.
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Affiliation(s)
- Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada,
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50
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Cornachione AS, Leite FS, Wang J, Leu NA, Kalganov A, Volgin D, Han X, Xu T, Cheng YS, Yates JRR, Rassier DE, Kashina A. Arginylation of myosin heavy chain regulates skeletal muscle strength. Cell Rep 2014; 8:470-6. [PMID: 25017061 PMCID: PMC4126752 DOI: 10.1016/j.celrep.2014.06.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 04/02/2014] [Accepted: 06/13/2014] [Indexed: 11/16/2022] Open
Abstract
Protein arginylation is a posttranslational modification with an emerging global role in the regulation of actin cytoskeleton. To test the role of arginylation in the skeletal muscle, we generated a mouse model with Ate1 deletion driven by the skeletal muscle-specific creatine kinase (Ckmm) promoter. Ckmm-Ate1 mice were viable and outwardly normal; however, their skeletal muscle strength was significantly reduced in comparison to controls. Mass spectrometry of isolated skeletal myofibrils showed a limited set of proteins, including myosin heavy chain, arginylated on specific sites. Atomic force microscopy measurements of contractile strength in individual myofibrils and isolated myosin filaments from these mice showed a significant reduction of contractile forces, which, in the case of myosin filaments, could be fully rescued by rearginylation with purified Ate1. Our results demonstrate that arginylation regulates force production in muscle and exerts a direct effect on muscle strength through arginylation of myosin.
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Affiliation(s)
- Anabelle S Cornachione
- Department of Kinesiology and Physical Education, Physics and Physiology, McGill University, Montreal, QC H2W 1S4, Canada
| | - Felipe S Leite
- Department of Kinesiology and Physical Education, Physics and Physiology, McGill University, Montreal, QC H2W 1S4, Canada
| | - Junling Wang
- Department of Animal Biology, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, PA 19104, USA
| | - Nicolae A Leu
- Department of Animal Biology, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, PA 19104, USA
| | - Albert Kalganov
- Department of Kinesiology and Physical Education, Physics and Physiology, McGill University, Montreal, QC H2W 1S4, Canada
| | - Denys Volgin
- Department of Animal Biology, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, PA 19104, USA
| | - Xuemei Han
- The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Tao Xu
- The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Yu-Shu Cheng
- Department of Kinesiology and Physical Education, Physics and Physiology, McGill University, Montreal, QC H2W 1S4, Canada
| | | | - Dilson E Rassier
- Department of Kinesiology and Physical Education, Physics and Physiology, McGill University, Montreal, QC H2W 1S4, Canada
| | - Anna Kashina
- Department of Animal Biology, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, PA 19104, USA.
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