1
|
Nguyen J, Gilbert PM. Decoding the forces that shape muscle stem cell function. Curr Top Dev Biol 2024; 158:279-306. [PMID: 38670710 DOI: 10.1016/bs.ctdb.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Skeletal muscle is a force-producing organ composed of muscle tissues, connective tissues, blood vessels, and nerves, all working in synergy to enable movement and provide support to the body. While robust biomechanical descriptions of skeletal muscle force production at the body or tissue level exist, little is known about force application on microstructures within the muscles, such as cells. Among various cell types, skeletal muscle stem cells reside in the muscle tissue environment and play a crucial role in driving the self-repair process when muscle damage occurs. Early evidence indicates that the fate and function of skeletal muscle stem cells are controlled by both biophysical and biochemical factors in their microenvironments, but much remains to accomplish in quantitatively describing the biophysical muscle stem cell microenvironment. This book chapter aims to review current knowledge on the influence of biophysical stresses and landscape properties on muscle stem cells in heath, aging, and diseases.
Collapse
Affiliation(s)
- Jo Nguyen
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada; Donnelly Centre, University of Toronto, Toronto, ON, Canada
| | - Penney M Gilbert
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada; Donnelly Centre, University of Toronto, Toronto, ON, Canada; Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada.
| |
Collapse
|
2
|
Chen C, Huang Y, Chen P, Hsu Y, Jaw F, Ho M. Modification of gelatin and photocured
3D
‐printed resin to prepare biomimetic phantoms for ultrasound‐guided minimally invasive surgeries. POLYM ENG SCI 2023. [DOI: 10.1002/pen.26216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Chien‐Hua Chen
- Department of Biomedical Engineering National Taiwan University Taipei City Taiwan
| | - Yi‐Fan Huang
- Department of Chemical Engineering National Taiwan University of Science and Technology Taipei City Taiwan
| | - Po‐Hao Chen
- Department of Chemical Engineering National Taiwan University of Science and Technology Taipei City Taiwan
| | - Yu‐Tung Hsu
- Department of Chemical Engineering National Taiwan University of Science and Technology Taipei City Taiwan
| | - Fu‐Shan Jaw
- Department of Biomedical Engineering National Taiwan University Taipei City Taiwan
| | - Ming‐Hua Ho
- Department of Chemical Engineering National Taiwan University of Science and Technology Taipei City Taiwan
- R&D Center for Membrane Technology National Taiwan University of Science and Technology Taipei Taiwan
| |
Collapse
|
3
|
Tahir I, Floreani R. Dual-Crosslinked Alginate-Based Hydrogels with Tunable Mechanical Properties for Cultured Meat. Foods 2022; 11:foods11182829. [PMID: 36140953 PMCID: PMC9498068 DOI: 10.3390/foods11182829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/26/2022] [Accepted: 09/08/2022] [Indexed: 11/29/2022] Open
Abstract
Cultured meat refers to the production of animal tissue by utilizing the same techniques as tissue engineering through cell culture. Various biomaterials have been designed to serve as in vitro supports for cell viability, growth, and migration. In this study, visible light and dual-crosslinked alginate hydrogels were designed to enable control of the physical and mechanical properties needed for the fabrication of cultured meat scaffolds. We hypothesized that a difference in hydrogel stiffness would influence cell behavior, indicating the efficacy of our processing methods to benefit the cultured meat field. Herein, we synthesized and created: (1) methacrylated alginate (AlgMA) to enable covalent crosslinking via visible light exposure, (2) Methacrylated alginate and arginyl-glycyl-aspartic acid RGD conjugates (AlgMA-RGD), using carbodiimide chemistries to provide cell-binding sites on the material, and (3) designer hydrogels incorporating different crosslinking techniques. The material and mechanical properties were evaluated to determine the structural integrity of the hydrogels, and in vitro cell assays were conducted to verify cytocompatibility and cell adhesion. Gelation, swell ratio, and weight loss calculations revealed longer gelation times for the AlgMA scaffolds and similar physical properties for all hydrogel groups. We showed that by adjusting the polymer concentration and the crosslinking methodology, the scaffold’s mechanical properties can be controlled and optimized within physiological ranges. Incorporating dual crosslinking significantly increased the compressive moduli of the AlgMA hydrogels, compared to visible-light crosslinking alone. Moreover, the muscle satellite cells responded favorably to the AlgMA scaffolds, with clear differences in cell density when cultured on materials with significantly different mechanical properties. Our results indicate the usefulness of the dual-crosslinking alginate hydrogel system to support in vitro meat growth.
Collapse
Affiliation(s)
- Irfan Tahir
- Department of Mechanical Engineering, University of Vermont, Burlington, VT 05405, USA
| | - Rachael Floreani
- Department of Mechanical Engineering, Department of Electrical and Biomedical Engineering, Materials Science and Engineering Graduate Program, Food Systems Graduate Program, University of Vermont, Burlington, VT 05405, USA
- Correspondence:
| |
Collapse
|
4
|
Canato M, Capitanio P, Cancellara L, Leanza L, Raffaello A, Reane DV, Marcucci L, Michelucci A, Protasi F, Reggiani C. Excessive Accumulation of Ca 2 + in Mitochondria of Y522S-RYR1 Knock-in Mice: A Link Between Leak From the Sarcoplasmic Reticulum and Altered Redox State. Front Physiol 2019; 10:1142. [PMID: 31607937 PMCID: PMC6755340 DOI: 10.3389/fphys.2019.01142] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 08/21/2019] [Indexed: 12/04/2022] Open
Abstract
Mice (Y522S or YS), carrying a mutation of the sarcoplasmic reticulum (SR) Ca2+ release channel of skeletal muscle fibers (ryanodine receptor type-1, RyR1) which causes Ca2+ leak, are a widely accepted and intensively studied model for human malignant hyperthermia (MH) susceptibility. Since the involvement of reactive oxygen species (ROS) and of mitochondria in MH crisis has been previously debated, here we sought to determine Ca2+ uptake in mitochondria and its possible link with ROS production in single fibers isolated from flexor digitorum brevis (FDB) of YS mice. We found that Ca2+ concentration in the mitochondrial matrix, as detected with the ratiometric FRET-based 4mtD3cpv probe, was higher in YS than in wild-type (WT) fibers at rest and after Ca2+ release from SR during repetitive electrical stimulation or caffeine administration. Also mitochondrial ROS production associated with contractile activity (detected with Mitosox probe) was much higher in YS fibers than in WT. Importantly, the inhibition of mitochondrial Ca2+ uptake achieved by silencing MCU reduced ROS accumulation in the matrix and Ca2+ release from SR. Finally, inhibition of mitochondrial ROS accumulation using Mitotempo reduced SR Ca2+ release in YS fibers exposed to caffeine. The present results support the view that mitochondria take up larger amounts of Ca2+ in YS than in WT fibers and that mitochondrial ROS production substantially contributes to the increased caffeine-sensitivity and to the enhanced Ca2+ release from SR in YS fibers.
Collapse
Affiliation(s)
- Marta Canato
- Department of Biomedical Sciences, School of Medicine and Surgery, University of Padova, Padua, Italy
| | - Paola Capitanio
- Department of Biomedical Sciences, School of Medicine and Surgery, University of Padova, Padua, Italy
| | - Lina Cancellara
- Department of Biomedical Sciences, School of Medicine and Surgery, University of Padova, Padua, Italy
| | - Luigi Leanza
- Department of Biology, University of Padova, Padua, Italy
| | - Anna Raffaello
- Department of Biomedical Sciences, School of Medicine and Surgery, University of Padova, Padua, Italy
| | - Denis Vecellio Reane
- Department of Biomedical Sciences, School of Medicine and Surgery, University of Padova, Padua, Italy
| | - Lorenzo Marcucci
- Department of Biomedical Sciences, School of Medicine and Surgery, University of Padova, Padua, Italy
| | - Antonio Michelucci
- Center for Advanced Studies and Technology, Università degli Studi “G. d’Annunzio” Chieti–Pescara, Chieti, Italy
- Department of Medicine and Aging Sciences, Università degli Studi “G. d’Annunzio” Chieti–Pescara, Chieti, Italy
| | - Feliciano Protasi
- Center for Advanced Studies and Technology, Università degli Studi “G. d’Annunzio” Chieti–Pescara, Chieti, Italy
- Department of Medicine and Aging Sciences, Università degli Studi “G. d’Annunzio” Chieti–Pescara, Chieti, Italy
| | - Carlo Reggiani
- Department of Biomedical Sciences, School of Medicine and Surgery, University of Padova, Padua, Italy
- Institute for Kinesiology Research, Science and Research Center of Koper, Koper, Slovenia
| |
Collapse
|
5
|
Böl M, Iyer R, Dittmann J, Garcés-Schröder M, Dietzel A. Investigating the passive mechanical behaviour of skeletal muscle fibres: Micromechanical experiments and Bayesian hierarchical modelling. Acta Biomater 2019; 92:277-289. [PMID: 31077887 DOI: 10.1016/j.actbio.2019.05.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 04/24/2019] [Accepted: 05/06/2019] [Indexed: 02/06/2023]
Abstract
Characterisation of the skeletal muscle's passive properties is a challenging task since its structure is dominated by a highly complex and hierarchical arrangement of fibrous components at different scales. The present work focuses on the micromechanical characterisation of skeletal muscle fibres, which consist of myofibrils, by realising three different deformation states, namely, axial tension, axial compression, and transversal compression. To the best of the authors' knowledge, the present study provides a novel comprehensive data set representing of different deformation states. These data allow for a better understanding of muscle fibre load transfer mechanisms and can be used for meaningful modelling approaches. As the present study shows, axial tension and compression experiments reveal a strong tension-compression asymmetry at fibre level. In comparison to the tissue level, this asymmetric behaviour is more pronounced at the fibre scale, elucidating the load transfer mechanism in muscle tissue and aiding in the development of future modelling strategies. Further, a Bayesian hierarchical modelling approach was used to consider the experimental fluctuations in a parameter identification scheme, leading to more comprehensive parameter distributions that reflect the entire observed experimental uncertainty. STATEMENT OF SIGNIFICANCE: This article examines for the first time the mechanical properties of skeletal muscle fibres under axial tension, axial compression, and transversal compression, leading to a highly comprehensive data set. Moreover, a Bayesian hierarchical modelling concept is presented to identify model parameters in a broad way. The results of the deformation states allow a new and comprehensive understanding of muscle fibres' load transfer mechanisms; one example is the effect of tension-compression asymmetry. On the one hand, the results of this study contribute to the understanding of muscle mechanics and thus to the muscle's functional understanding during daily activity. On the other hand, they are relevant in the fields of skeletal muscle multiscale, constitutive modelling.
Collapse
Affiliation(s)
- Markus Böl
- Institute of Solid Mechanics, Technische Universität Braunschweig, Braunschweig D-38106, Germany.
| | - Rahul Iyer
- Institute of Solid Mechanics, Technische Universität Braunschweig, Braunschweig D-38106, Germany
| | - Johannes Dittmann
- Institute of Solid Mechanics, Technische Universität Braunschweig, Braunschweig D-38106, Germany
| | - Mayra Garcés-Schröder
- Institute of Micro Technology, Technische Universität Braunschweig, Braunschweig D-38124, Germany
| | - Andreas Dietzel
- Institute of Micro Technology, Technische Universität Braunschweig, Braunschweig D-38124, Germany
| |
Collapse
|
6
|
Development of a novel multiphysical approach for the characterization of mechanical properties of musculotendinous tissues. Sci Rep 2019; 9:7733. [PMID: 31118478 PMCID: PMC6531478 DOI: 10.1038/s41598-019-44053-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 05/03/2019] [Indexed: 12/02/2022] Open
Abstract
At present, there is a lack of well-validated protocols that allow for the analysis of the mechanical properties of muscle and tendon tissues. Further, there are no reports regarding characterization of mouse skeletal muscle and tendon mechanical properties in vivo using elastography thereby limiting the ability to monitor changes in these tissues during disease progression or response to therapy. Therefore, we sought to develop novel protocols for the characterization of mechanical properties in musculotendinous tissues using atomic force microscopy (AFM) and ultrasound elastography. Given that TIEG1 knockout (KO) mice exhibit well characterized defects in the mechanical properties of skeletal muscle and tendon tissue, we have chosen to use this model system in the present study. Using TIEG1 knockout and wild-type mice, we have devised an AFM protocol that does not rely on the use of glue or chemical agents for muscle and tendon fiber immobilization during acquisition of transversal cartographies of elasticity and topography. Additionally, since AFM cannot be employed on live animals, we have also developed an ultrasound elastography protocol using a new linear transducer, SLH20-6 (resolution: 38 µm, footprint: 2.38 cm), to characterize the musculotendinous system in vivo. This protocol allows for the identification of changes in muscle and tendon elasticities. Such innovative technological approaches have no equivalent to date, promise to accelerate our understanding of musculotendinous mechanical properties and have numerous research and clinical applications.
Collapse
|
7
|
Li J, Kang L, Long Y, Wei H, Yu Y, Wang Y, Ferreira CA, Yao G, Zhang Z, Carlos C, German L, Lan X, Cai W, Wang X. Implanted Battery-Free Direct-Current Micro-Power Supply from in Vivo Breath Energy Harvesting. ACS APPLIED MATERIALS & INTERFACES 2018; 10:42030-42038. [PMID: 30444344 PMCID: PMC6456428 DOI: 10.1021/acsami.8b15619] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In vivo biomechanical energy harvesting by implanted nanogenerators (i-NGs) is promising for self-powered implantable medical devices (IMDs). One critical challenge to reach practical applications is the requirement of continuous direct-current (dc) output, while the low-frequency body activities typically generate discrete electrical pulses. Here, we developed an ultrastretchable micrograting i-NG system that could function as a battery-free dc micro-power supply. Packaged by a soft silicone elastomer with a cavity design, the i-NG exhibited an ultralow Young's modulus of ∼45 kPa and a high biocompatibility to soft biological tissues. The i-NG was implanted inside the abdominal cavity of Sprague Dawley adult rats and directly converted the slow diaphragm movement during normal respiration into a high-frequency alternative current electrical output, which was readily transmitted into a continuous ∼2.2 V dc output after being integrated with a basic electrical circuit. A light-emitting diode was constantly operated by the breath-driven i-NG without the aid of any battery component. This solely biomechanical energy-driven dc micro-power supply offers a promising solution for the development of self-powered IMDs.
Collapse
Affiliation(s)
- Jun Li
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Lei Kang
- Department of Radiology and Medical Physics , University of Wisconsin-Madison , Madison , Wisconsin 53705 , United States
- Department of Nuclear Medicine , Peking University First Hospital , Beijing 100034 , China
| | - Yin Long
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , China
| | - Hao Wei
- Department of Radiology and Medical Physics , University of Wisconsin-Madison , Madison , Wisconsin 53705 , United States
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan 430022 , China
| | - Yanhao Yu
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Yizhan Wang
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Carolina A Ferreira
- Department of Radiology and Medical Physics , University of Wisconsin-Madison , Madison , Wisconsin 53705 , United States
| | - Guang Yao
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , China
| | - Ziyi Zhang
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Corey Carlos
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Lazarus German
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Xiaoli Lan
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan 430022 , China
| | - Weibo Cai
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
- Department of Radiology and Medical Physics , University of Wisconsin-Madison , Madison , Wisconsin 53705 , United States
| | - Xudong Wang
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| |
Collapse
|
8
|
Thorrez L, DiSano K, Shansky J, Vandenburgh H. Engineering of Human Skeletal Muscle With an Autologous Deposited Extracellular Matrix. Front Physiol 2018; 9:1076. [PMID: 30177884 PMCID: PMC6109771 DOI: 10.3389/fphys.2018.01076] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 07/18/2018] [Indexed: 01/01/2023] Open
Abstract
Adult skeletal muscle progenitor cells can be embedded in an extracellular matrix (ECM) and tissue-engineered to form bio-artificial muscles (BAMs), composed of aligned post-mitotic myofibers. The ECM proteins which have been used most commonly are collagen type I and fibrin. Fibrin allows for in vitro vasculogenesis, however, high concentrations of fibrinolysis inhibitors are needed to inhibit degradation of the ECM and subsequent loss of BAM tissue structure. For in vivo implantation, fibrinolysis inhibition may prove difficult or even harmful to the host. Therefore, we adapted in vitro culture conditions to enhance the deposition of de novo synthesized collagen type I gradually replacing the degrading fibrin ECM. The in vitro viscoelastic properties of the fibrin BAMs and deposition of collagen were characterized. BAMs engineered with the addition of proline, hydroxyproline, and ascorbic acid in the tissue culture medium had a twofold increase in Young’s Modulus, a 2.5-fold decrease in maximum strain, and a 1.6-fold increase in collagen deposition. Lowering the fibrin content of the BAMs also increased Young’s Modulus, decreased maximum strain, and increased collagen deposition. Tissue engineering of BAMs with autologous ECM may allow for prolonged in vivo survival.
Collapse
Affiliation(s)
- Lieven Thorrez
- Tissue Engineering Laboratory, Department of Development and Regeneration, KU Leuven Kulak, Kortrijk, Belgium
| | - Katherine DiSano
- School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Janet Shansky
- Department of Pathology, The Miriam Hospital, Brown University, Providence, RI, United States
| | - Herman Vandenburgh
- Department of Pathology, The Miriam Hospital, Brown University, Providence, RI, United States
| |
Collapse
|
9
|
Myotube elasticity of an amyotrophic lateral sclerosis mouse model. Sci Rep 2018; 8:5917. [PMID: 29650983 PMCID: PMC5897453 DOI: 10.1038/s41598-018-24027-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/14/2018] [Indexed: 01/02/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease that affects the motor system leading to generalized paralysis and death of patients. The understanding of early pathogenic mechanisms will help to define early diagnostics criteria that will eventually provide basis for efficient therapeutics. Early symptoms of ALS usually include muscle weakness or stiffness. Therefore, mechanical response of differentiated myotubes from primary cultures of mice, expressing the ALS-causing SOD1G93A mutation, was examined by atomic force microscopy. Simultaneous acquisition of topography and cell elasticity of ALS myotubes was performed by force mapping method, compared with healthy myotubes and supplemented with immunofluorescence and qRT-PCR studies. Wild type myotubes reveal a significant difference in elasticity between a narrow and a wide population, consistent with maturation occurring with higher actin expression relative to myosin together with larger myotube width. However, this is not true for SOD1G93A expressing myotubes, where a significant shift of thin population towards higher elastic modulus values was observed. We provide evidence that SOD1 mutant induces structural changes that occurs very early in muscle development and well before symptomatic stage of the disease. These findings could significantly contribute to the understanding of the role of skeletal muscle in ALS pathogenesis.
Collapse
|
10
|
Soft chitosan microbeads scaffold for 3D functional neuronal networks. Biomaterials 2018; 156:159-171. [DOI: 10.1016/j.biomaterials.2017.11.043] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/15/2017] [Accepted: 11/27/2017] [Indexed: 12/27/2022]
|
11
|
Estrogens Protect Calsequestrin-1 Knockout Mice from Lethal Hyperthermic Episodes by Reducing Oxidative Stress in Muscle. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:6936897. [PMID: 29062464 PMCID: PMC5610815 DOI: 10.1155/2017/6936897] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 07/11/2017] [Accepted: 07/20/2017] [Indexed: 01/12/2023]
Abstract
Oxidative stress has been proposed to play a key role in malignant hyperthermia (MH), a syndrome caused by excessive Ca2+ release in skeletal muscle. Incidence of mortality in male calsequestrin-1 knockout (CASQ1-null) mice during exposure to halothane and heat (a syndrome closely resembling human MH) is far greater than that in females. To investigate the possible role of sex hormones in this still unexplained gender difference, we treated male and female CASQ1-null mice for 1 month, respectively, with Premarin (conjugated estrogens) and leuprolide (GnRH analog) and discovered that during exposure to halothane and heat Premarin reduced the mortality rate in males (79-27% and 86-20%), while leuprolide increased the incidence of mortality in females (18-73% and 24-82%). We then evaluated the (a) responsiveness of isolated muscles to temperature and caffeine, (b) sarcoplasmic reticulum (SR) Ca2+ release in single fibers, and (c) oxidative stress and the expression levels of main enzymes involved in the regulation of the redox balance in muscle. Premarin treatment reduced the temperature and caffeine sensitivity of EDL muscles, normalized SR Ca2+ release, and reduced oxidative stress in males, suggesting that female sex hormones may protect mice from lethal hyperthermic episodes by reducing both the SR Ca2+ leak and oxidative stress.
Collapse
|
12
|
Michelucci A, Paolini C, Boncompagni S, Canato M, Reggiani C, Protasi F. Strenuous exercise triggers a life-threatening response in mice susceptible to malignant hyperthermia. FASEB J 2017; 31:3649-3662. [PMID: 28465322 DOI: 10.1096/fj.201601292r] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 04/17/2017] [Indexed: 12/26/2022]
Abstract
In humans, hyperthermic episodes can be triggered by halogenated anesthetics [malignant hyperthermia (MH) susceptibility] and by high temperature [environmental heat stroke (HS)]. Correlation between MH susceptibility and HS is supported by extensive work in mouse models that carry a mutation in ryanodine receptor type-1 (RYR1Y522S/WT) and calsequestrin-1 knockout (CASQ1-null), 2 proteins that control Ca2+ release in skeletal muscle. As overheating episodes in humans have also been described during exertion, here we subjected RYR1Y522S/WT and CASQ1-null mice to an exertional-stress protocol (incremental running on a treadmill at 34°C and 40% humidity). The mortality rate was 80 and 78.6% in RYR1Y522S/WT and CASQ1-null mice, respectively, vs. 0% in wild-type mice. Lethal crises were characterized by hyperthermia and rhabdomyolysis, classic features of MH episodes. Of importance, pretreatment with azumolene, an analog of the drug used in humans to treat MH crises, reduced mortality to 0 and 12.5% in RYR1Y522S/WT and CASQ1-null mice, respectively, thanks to a striking reduction of hyperthermia and rhabdomyolysis. At the molecular level, azumolene strongly prevented Ca2+-dependent activation of calpains and NF-κB by lowering myoplasmic Ca2+ concentration and nitro-oxidative stress, parameters that were elevated in RYR1Y522S/WT and CASQ1-null mice. These results suggest that common molecular mechanisms underlie MH crises and exertional HS in mice.-Michelucci, A., Paolini, C., Boncompagni, S., Canato, M., Reggiani, C., Protasi, F. Strenuous exercise triggers a life-threatening response in mice susceptible to malignant hyperthermia.
Collapse
Affiliation(s)
- Antonio Michelucci
- Center for Research on Ageing and Translational Medicine (CeSI-MeT), Department of Neuroscience, Imaging, and Clinical Sciences (DNICS), Università degli Studi G. d'Annunzio, Chieti, Italy
| | - Cecilia Paolini
- Center for Research on Ageing and Translational Medicine (CeSI-MeT), Department of Neuroscience, Imaging, and Clinical Sciences (DNICS), Università degli Studi G. d'Annunzio, Chieti, Italy
| | - Simona Boncompagni
- Center for Research on Ageing and Translational Medicine (CeSI-MeT), Department of Neuroscience, Imaging, and Clinical Sciences (DNICS), Università degli Studi G. d'Annunzio, Chieti, Italy
| | - Marta Canato
- Department of Biomedical Sciences, University of Padova, Padua, Italy
| | - Carlo Reggiani
- Department of Biomedical Sciences, University of Padova, Padua, Italy
| | - Feliciano Protasi
- Center for Research on Ageing and Translational Medicine (CeSI-MeT), Department of Neuroscience, Imaging, and Clinical Sciences (DNICS), Università degli Studi G. d'Annunzio, Chieti, Italy; .,Department of Medicine and Aging Science, University G. d' Annunzio of Chieti, Chieti, Italy
| |
Collapse
|
13
|
Puzzo D, Raiteri R, Castaldo C, Capasso R, Pagano E, Tedesco M, Gulisano W, Drozd L, Lippiello P, Palmeri A, Scotto P, Miniaci MC. CL316,243, a β3-adrenergic receptor agonist, induces muscle hypertrophy and increased strength. Sci Rep 2016; 5:37504. [PMID: 27874066 PMCID: PMC5118701 DOI: 10.1038/srep37504] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 10/28/2016] [Indexed: 12/12/2022] Open
Abstract
Studies in vitro have demonstrated that β3-adrenergic receptors (β3-ARs) regulate protein metabolism in skeletal muscle by promoting protein synthesis and inhibiting protein degradation. In this study, we evaluated whether activation of β3-ARs by the selective agonist CL316,243 modifies the functional and structural properties of skeletal muscles of healthy mice. Daily injections of CL316,243 for 15 days resulted in a significant improvement in muscle force production, assessed by grip strength and weight tests, and an increased myofiber cross-sectional area, indicative of muscle hypertrophy. In addition, atomic force microscopy revealed a significant effect of CL316,243 on the transversal stiffness of isolated muscle fibers. Interestingly, the expression level of mammalian target of rapamycin (mTOR) downstream targets and neuronal nitric oxide synthase (NOS) was also found to be enhanced in tibialis anterior and soleus muscles of CL316,243 treated mice, in accordance with previous data linking β3-ARs to mTOR and NOS signaling pathways. In conclusion, our data suggest that CL316,243 systemic administration might be a novel therapeutic strategy worthy of further investigations in conditions of muscle wasting and weakness associated with aging and muscular diseases.
Collapse
Affiliation(s)
- Daniela Puzzo
- Department of Biomedical and Biotechnological Sciences - Section of Physiology, University of Catania, Catania, Italy
| | - Roberto Raiteri
- Department of Informatics, Bioengineering, Robotics, and System Engineering, University of Genova, Italy
| | - Clotilde Castaldo
- Department of Public Health, School of Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Raffaele Capasso
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Ester Pagano
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Mariateresa Tedesco
- Department of Informatics, Bioengineering, Robotics, and System Engineering, University of Genova, Italy
| | - Walter Gulisano
- Department of Biomedical and Biotechnological Sciences - Section of Physiology, University of Catania, Catania, Italy
| | - Lisaveta Drozd
- Department of Informatics, Bioengineering, Robotics, and System Engineering, University of Genova, Italy
| | | | - Agostino Palmeri
- Department of Biomedical and Biotechnological Sciences - Section of Physiology, University of Catania, Catania, Italy
| | - Pietro Scotto
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | | |
Collapse
|
14
|
Quarta M, Brett JO, DiMarco R, De Morree A, Boutet SC, Chacon R, Gibbons MC, Garcia VA, Su J, Shrager JB, Heilshorn S, Rando TA. An artificial niche preserves the quiescence of muscle stem cells and enhances their therapeutic efficacy. Nat Biotechnol 2016; 34:752-9. [PMID: 27240197 PMCID: PMC4942359 DOI: 10.1038/nbt.3576] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 04/15/2016] [Indexed: 12/11/2022]
Abstract
A promising therapeutic strategy for diverse genetic disorders involves transplantation of autologous stem cells that have been genetically corrected ex vivo. A major challenge in such approaches is a loss of stem cell potency during culture. Here we describe an artificial niche for maintaining muscle stem cells (MuSCs) in vitro in a potent, quiescent state. Using a machine learning method, we identified a molecular signature of quiescence and used it to screen for factors that could maintain mouse MuSC quiescence, thus defining a quiescence medium (QM). We also engineered muscle fibers that mimic the native myofiber of the MuSC niche. Mouse MuSCs maintained in QM on engineered fibers showed enhanced potential for engraftment, tissue regeneration and self-renewal after transplantation in mice. An artificial niche adapted to human cells similarly extended the quiescence of human MuSCs in vitro and enhanced their potency in vivo. Our approach for maintaining quiescence may be applicable to stem cells isolated from other tissues.
Collapse
Affiliation(s)
- Marco Quarta
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, California, USA
- Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA
| | - Jamie O. Brett
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, California, USA
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Rebecca DiMarco
- Department of Bioengineering, Stanford University, Stanford, California, USA
| | - Antoine De Morree
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, California, USA
| | - Stephane C. Boutet
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, California, USA
| | - Robert Chacon
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, California, USA
- Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA
| | - Michael C. Gibbons
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, California, USA
- Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA
| | - Victor A. Garcia
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, California, USA
- Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA
| | - James Su
- Department of Materials Science & Engineering, Stanford University, Stanford, California, USA
| | - Joseph B. Shrager
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Sarah Heilshorn
- Department of Materials Science & Engineering, Stanford University, Stanford, California, USA
| | - Thomas A. Rando
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, California, USA
- Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA
| |
Collapse
|
15
|
Sehgel NL, Vatner SF, Meininger GA. "Smooth Muscle Cell Stiffness Syndrome"-Revisiting the Structural Basis of Arterial Stiffness. Front Physiol 2015; 6:335. [PMID: 26635621 PMCID: PMC4649054 DOI: 10.3389/fphys.2015.00335] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 11/02/2015] [Indexed: 02/05/2023] Open
Abstract
In recent decades, the pervasiveness of increased arterial stiffness in patients with cardiovascular disease has become increasingly apparent. Though, this phenomenon has been well documented in humans and animal models of disease for well over a century, there has been surprisingly limited development in a deeper mechanistic understanding of arterial stiffness. Much of the historical literature has focused on changes in extracellular matrix proteins—collagen and elastin. However, extracellular matrix changes alone appear insufficient to consistently account for observed changes in vascular stiffness, which we observed in our studies of aortic stiffness in aging monkeys. This led us to examine novel mechanisms operating at the level of the vascular smooth muscle cell (VSMC)—that include increased cell stiffness and adhesion to extracellular matrix—which that may be interrelated with other mechanisms contributing to arterial stiffness. We introduce these observations as a new concept—the Smooth Muscle Cell Stiffness Syndrome (SMCSS)—within the field of arterial stiffness and posit that stiffening of vascular cells impairs vascular function and may contribute stiffening to the vasculature with aging and cardiovascular disease. Importantly, this review article revisits the structural basis of arterial stiffness in light of these novel findings. Such classification of SMCSS and its contextualization into our current understanding of vascular mechanics may be useful in the development of strategic therapeutics to directly target arterial stiffness.
Collapse
Affiliation(s)
- Nancy L Sehgel
- Department of Cell Biology and Molecular Medicine, New Jersey Medical School, Rutgers University - Biomedical and Health Sciences Newark, NJ, USA ; Department of Biomedical Engineering, New Jersey Institute of Technology Newark, NJ, USA
| | - Stephen F Vatner
- Department of Biomedical Engineering, New Jersey Institute of Technology Newark, NJ, USA
| | - Gerald A Meininger
- Dalton Cardiovascular Research Center, Department of Medical Pharmacology and Physiology, University of Missouri Columbia, MO, USA
| |
Collapse
|
16
|
Michelucci A, Paolini C, Canato M, Wei-Lapierre L, Pietrangelo L, De Marco A, Reggiani C, Dirksen RT, Protasi F. Antioxidants protect calsequestrin-1 knockout mice from halothane- and heat-induced sudden death. Anesthesiology 2015; 123:603-17. [PMID: 26132720 PMCID: PMC4543432 DOI: 10.1097/aln.0000000000000748] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Mice lacking calsequestrin-1 (CASQ1-null), a Ca-binding protein that modulates the activity of Ca release in the skeletal muscle, exhibit lethal hypermetabolic episodes that resemble malignant hyperthermia in humans when exposed to halothane or heat stress. METHODS Because oxidative species may play a critical role in malignant hyperthermia crises, we treated CASQ1-null mice with two antioxidants, N-acetylcysteine (NAC, Sigma-Aldrich, Italy; provided ad libitum in drinking water) and (±)-6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid (Trolox, Sigma-Aldrich; administered by intraperitoneal injection), before exposure to halothane (2%, 1 h) or heat (41°C, 1 h). RESULTS NAC and Trolox significantly protected CASQ1-null mice from lethal episodes, with mortality being 79% (n = 14), 25% (n = 16), and 20% (n = 5) during halothane exposure and 86% (n = 21), 29% (n = 21), and 33% (n = 6) during heat stress in untreated, NAC-treated, and Trolox-treated mice, respectively. During heat challenge, an increase in core temperature in CASQ1-null mice (42.3° ± 0.1°C, n=10) was significantly reduced by both NAC and Trolox (40.6° ± 0.3°C, n = 6 and 40.5° ± 0.2°C, n = 6). NAC treatment of CASQ1-null muscles/mice normalized caffeine sensitivity during in vitro contracture tests, Ca transients in single fibers, and significantly reduced the percentage of fibers undergoing rhabdomyolysis (37.6 ± 2.5%, 38/101 fibers in 3 mice; 11.6 ± 1.1%, 21/186 fibers in 5 mice). The protective effect of antioxidant treatment likely resulted from mitigation of oxidative stress, because NAC reduced mitochondrial superoxide production, superoxide dismutase type-1 expression, and 3-nitrotyrosine expression, and increased both reduced glutathione and reduced glutathione/oxidized glutathione ratio. CONCLUSION These studies provide a deeper understanding of the mechanisms that underlie hyperthermic crises in CASQ1-deficient muscle and demonstrate that antioxidant pretreatment may prevent them.
Collapse
Affiliation(s)
- Antonio Michelucci
- Postdoctoral Fellow, CeSI - Center for Research on Ageing & DNICS – Department of Neuroscience, Imaging and Clinical Sciences, University G. d’Annunzio of Chieti, I-66100 Chieti, Italy
| | - Cecilia Paolini
- Assistant Professor, CeSI - Center for Research on Ageing & DNICS – Department of Neuroscience, Imaging and Clinical Sciences, University G. d’Annunzio of Chieti, I-66100 Chieti, Italy
| | - Marta Canato
- Research Assistant, Department of Biomedical Sciences, University of Padova, I-35131 Italy
| | - Lan Wei-Lapierre
- Research Assistant Professor, Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY 14642
| | - Laura Pietrangelo
- Postdoctoral Fellow, CeSI - Center for Research on Ageing & DNICS – Department of Neuroscience, Imaging and Clinical Sciences, University G. d’Annunzio of Chieti, I-66100 Chieti, Italy
| | - Alessandro De Marco
- Postdoctoral fellow, CeSI - Center for Research on Ageing & DNICS – Department of Neuroscience, Imaging and Clinical Sciences, University G. d’Annunzio of Chieti, I-66100 Chieti, Italy
| | - Carlo Reggiani
- Professor, Department of Biomedical Sciences, University of Padova, I-35131 Italy
| | - Robert T. Dirksen
- Professor, Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY 14642
| | - Feliciano Protasi
- Professor, CeSI - Center for Research on Ageing & DNICS – Department of Neuroscience, Imaging and Clinical Sciences, University G. d’Annunzio of Chieti, I-66100 Chieti, Italy
| |
Collapse
|
17
|
Smith AST, Long CJ, McAleer C, Guo X, Esch M, Prot JM, Shuler ML, Hickman JJ. ‘Body-on-a-Chip’ Technology and Supporting Microfluidics. HUMAN-BASED SYSTEMS FOR TRANSLATIONAL RESEARCH 2014. [DOI: 10.1039/9781782620136-00132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In order to effectively streamline current drug development protocols, there is a need to generate high information content preclinical screens capable of generating data with a predictive power in relation to the activity of novel therapeutics in humans. Given the poor predictive power of animal models, and the lack of complexity and interconnectivity of standard in vitro culture methodologies, many investigators are now moving toward the development of physiologically and functionally accurate culture platforms composed of human cells to investigate cellular responses to drug compounds in high-throughput preclinical studies. The generation of complex, multi-organ in vitro platforms, built to recapitulate physiological dimensions, flow rates and shear stresses, is being investigated as the logical extension of this drive. Production and application of a biologically accurate multi-organ platform, or ‘body-on-a-chip’, would facilitate the correct modelling of the dynamic and interconnected state of living systems for high-throughput drug studies as well as basic and applied biomolecular research. This chapter will discuss current technologies aimed at producing ‘body-on-a-chip’ models, as well as highlighting recent advances and important challenges still to be met in the development of biomimetic single-organ systems for drug development purposes.
Collapse
Affiliation(s)
- A. S. T. Smith
- NanoScience Technology Center, University of Central Florida Orlando FL 32826 USA
| | - C. J. Long
- NanoScience Technology Center, University of Central Florida Orlando FL 32826 USA
| | - C. McAleer
- NanoScience Technology Center, University of Central Florida Orlando FL 32826 USA
| | - X. Guo
- NanoScience Technology Center, University of Central Florida Orlando FL 32826 USA
| | - M. Esch
- Biomedical Engineering, Cornell University Ithaca NY USA
| | - J. M. Prot
- Biomedical Engineering, Cornell University Ithaca NY USA
| | - M. L. Shuler
- Biomedical Engineering, Cornell University Ithaca NY USA
| | - J. J. Hickman
- NanoScience Technology Center, University of Central Florida Orlando FL 32826 USA
| |
Collapse
|
18
|
Timmel T, Schuelke M, Spuler S. Identifying dynamic membrane structures with atomic-force microscopy and confocal imaging. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2014; 20:514-520. [PMID: 24524258 DOI: 10.1017/s1431927613014098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Combining the biological specificity of fluorescence microscopy with topographical features revealed by atomic force microscopy (AFM) provides new insights into cell biology. However, the lack of systematic alignment capabilities especially in scanning-tip AFM has limited the combined application approach as AFM drift leads to increasing image mismatch over time. We present an alignment correction method using the cantilever tip as a reference landmark. Since the precise tip position is known in both the fluorescence and AFM images, exact re-alignment becomes possible. We used beads to demonstrate the validity of the method in a complex artificial sample. We then extended this method to biological samples to depict membrane structures in fixed and living human fibroblasts. We were able to map nanoscale membrane structures, such as clathrin-coated pits, to their respective fluorescent spots. Reliable alignment between fluorescence signals and topographic structures opens possibilities to assess key biological processes at the cell surface such as endocytosis and exocytosis.
Collapse
Affiliation(s)
- Tobias Timmel
- 1 Muscle Research Unit, Experimental and Clinical Research Center, a joint cooperation between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine Berlin, Lindenberger Weg 80, D-13125 Berlin, Germany
| | - Markus Schuelke
- 2 Department of Neuropediatrics and NeuroCure Clinical Research Center, Charité Universitätsmedizin, Augustenburger Platz 1, D-13353 Berlin, Germany
| | - Simone Spuler
- 1 Muscle Research Unit, Experimental and Clinical Research Center, a joint cooperation between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine Berlin, Lindenberger Weg 80, D-13125 Berlin, Germany
| |
Collapse
|
19
|
Soltanizadeh N, Kadivar M. Nanomechanical Characteristics of Meat and Its Constituents Postmortem: A Review. Crit Rev Food Sci Nutr 2014; 54:1117-39. [DOI: 10.1080/10408398.2011.627518] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
20
|
Scorzeto M, Giacomello M, Toniolo L, Canato M, Blaauw B, Paolini C, Protasi F, Reggiani C, Stienen GJM. Mitochondrial Ca2+-handling in fast skeletal muscle fibers from wild type and calsequestrin-null mice. PLoS One 2013; 8:e74919. [PMID: 24098358 PMCID: PMC3789688 DOI: 10.1371/journal.pone.0074919] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 08/07/2013] [Indexed: 11/19/2022] Open
Abstract
Mitochondrial calcium handling and its relation with calcium released from sarcoplasmic reticulum (SR) in muscle tissue are subject of lively debate. In this study we aimed to clarify how the SR determines mitochondrial calcium handling using dCASQ-null mice which lack both isoforms of the major Ca2+-binding protein inside SR, calsequestrin. Mitochondrial free Ca2+-concentration ([Ca2+]mito) was determined by means of a genetically targeted ratiometric FRET-based probe. Electron microscopy revealed a highly significant increase in intermyofibrillar mitochondria (+55%) and augmented coupling (+12%) between Ca2+ release units of the SR and mitochondria in dCASQ-null vs. WT fibers. Significant differences in the baseline [Ca2+]mito were observed between quiescent WT and dCASQ-null fibers, but not in the resting cytosolic Ca2+ concentration. The rise in [Ca2+]mito during electrical stimulation occurred in 20−30 ms, while the decline during and after stimulation was governed by 4 rate constants of approximately 40, 1.6, 0.2 and 0.03 s−1. Accordingly, frequency-dependent increase in [Ca2+]mito occurred during sustained contractions. In dCASQ-null fibers the increases in [Ca2+]mito were less pronounced than in WT fibers and even lower when extracellular calcium was removed. The amplitude and duration of [Ca2+]mito transients were increased by inhibition of mitochondrial Na+/Ca2+ exchanger (mNCX). These results provide direct evidence for fast Ca2+ accumulation inside the mitochondria, involvement of the mNCX in mitochondrial Ca2+-handling and a dependence of mitochondrial Ca2+-handling on intracellular (SR) and external Ca2+ stores in fast skeletal muscle fibers. dCASQ-null mice represent a model for malignant hyperthermia. The differences in structure and in mitochondrial function observed relative to WT may represent compensatory mechanisms for the disease-related reduction of calcium storage capacity of the SR and/or SR Ca2+-leakage.
Collapse
Affiliation(s)
- Michele Scorzeto
- Department of Biomedical Sciences and Interuniversity Institute of Myology (IIM), University of Padova, Padua, Italy
| | | | - Luana Toniolo
- Department of Biomedical Sciences and Interuniversity Institute of Myology (IIM), University of Padova, Padua, Italy
| | - Marta Canato
- Department of Biomedical Sciences and Interuniversity Institute of Myology (IIM), University of Padova, Padua, Italy
| | - Bert Blaauw
- Department of Biomedical Sciences and Interuniversity Institute of Myology (IIM), University of Padova, Padua, Italy
- Venetian Institute of Molecular Medicine, Padua, Italy
| | - Cecilia Paolini
- Department of Neuroscience and Imaging (DNI) and Center for Research on Ageing (CeSI), and Interuniversity Institute of Myology (IIM), University G. d' Annunzio, Chieti, Italy
| | - Feliciano Protasi
- Department of Neuroscience and Imaging (DNI) and Center for Research on Ageing (CeSI), and Interuniversity Institute of Myology (IIM), University G. d' Annunzio, Chieti, Italy
| | - Carlo Reggiani
- Department of Biomedical Sciences and Interuniversity Institute of Myology (IIM), University of Padova, Padua, Italy
| | - Ger J. M. Stienen
- Laboratory for Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands
- Department of Physics and Astronomy, VU University Amsterdam, Amsterdam, The Netherlands
- * E-mail:
| |
Collapse
|
21
|
Cell mechanosensitivity: mechanical properties and interaction with gravitational field. BIOMED RESEARCH INTERNATIONAL 2012; 2013:598461. [PMID: 23509748 PMCID: PMC3591207 DOI: 10.1155/2013/598461] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Revised: 11/17/2012] [Accepted: 11/27/2012] [Indexed: 02/08/2023]
Abstract
This paper addressed the possible mechanisms of primary reception of a mechanical stimulus by different cells. Data concerning the stiffness of muscle and nonmuscle cells as measured by atomic force microscopy are provided. The changes in the mechanical properties of cells that occur under changed external mechanical tension are presented, and the initial stages of mechanical signal transduction are considered. The possible mechanism of perception of different external mechanical signals by cells is suggested.
Collapse
|
22
|
Khairallah RJ, Shi G, Sbrana F, Prosser BL, Borroto C, Mazaitis MJ, Hoffman EP, Mahurkar A, Sachs F, Sun Y, Chen YW, Raiteri R, Lederer WJ, Dorsey SG, Ward CW. Microtubules underlie dysfunction in duchenne muscular dystrophy. Sci Signal 2012; 5:ra56. [PMID: 22871609 DOI: 10.1126/scisignal.2002829] [Citation(s) in RCA: 191] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Duchenne muscular dystrophy (DMD) is a fatal X-linked degenerative muscle disease caused by the absence of the microtubule-associated protein dystrophin, which results in a disorganized and denser microtubule cytoskeleton. In addition, mechanotransduction-dependent activation of calcium (Ca(2+)) and reactive oxygen species (ROS) signaling underpins muscle degeneration in DMD. We show that in muscle from adult mdx mice, a model of DMD, a brief physiologic stretch elicited microtubule-dependent activation of NADPH (reduced-form nicotinamide adenine dinucleotide phosphate) oxidase-dependent production of ROS, termed X-ROS. Further, X-ROS amplified Ca(2+) influx through stretch-activated channels in mdx muscle. Consistent with the importance of the microtubules to the dysfunction in mdx muscle, muscle cells with dense microtubule structure, such as those from adult mdx mice or from young wild-type mice treated with Taxol, showed increased X-ROS production and Ca(2+) influx, whereas cells with a less dense microtubule network, such as young mdx or adult mdx muscle treated with colchicine or nocodazole, showed little ROS production or Ca(2+) influx. In vivo treatments that disrupted the microtubule network or inhibited NADPH oxidase 2 reduced contraction-induced injury in adult mdx mice. Furthermore, transcriptome analysis identified increased expression of X-ROS-related genes in human DMD skeletal muscle. Together, these data show that microtubules are the proximate element responsible for the dysfunction in Ca(2+) and ROS signaling in DMD and could be effective therapeutic targets for intervention.
Collapse
Affiliation(s)
- Ramzi J Khairallah
- Center for Biomedical Engineering and Technology and Department of Physiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Golubeva EI, Danilova RI. [The characteristics of aging rate among elderly people on the European North of Russia]. ADVANCES IN GERONTOLOGY 2012; 25:45-8. [PMID: 22708443 DOI: 10.1134/s2079057012010092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Social factors and the role of environment which influence to the aging process on the cohort of the elderly people on European North of Russia have been discussed. The indicators of aging of elderly people stated in the different living conditions with defining risk factors have been analyzed. The predominance of the individuals with high rates of aging in the men's cohort living in the rural areas has been considered. Consume alcohol is the aggravating factor accelerating the significant aging rate of women addicted to alcohol.
Collapse
|
24
|
Calve S, Simon HG. Biochemical and mechanical environment cooperatively regulate skeletal muscle regeneration. FASEB J 2012; 26:2538-45. [PMID: 22415307 PMCID: PMC3360155 DOI: 10.1096/fj.11-200162] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Accepted: 02/21/2012] [Indexed: 11/11/2022]
Abstract
During forelimb regeneration in the newt Notophthalmus viridescens, the dynamic expression of a transitional matrix rich in hyaluronic acid, tenascin-C, and fibronectin controls muscle cell behavior in vivo and in vitro. However, the influence of extracellular matrix (ECM) remodeling on tissue stiffness and the cellular response to mechanical variations during regeneration was unknown. By measuring the transverse stiffness of tissues in situ, we found undifferentiated regenerative blastemas were less stiff than differentiated stump muscle (13.3±1.6 vs. 16.6±1.2 kPa). To directly determine how ECM and stiffness combine to affect skeletal muscle fragmentation, migration, and fusion, we coated silicone-based substrates ranging from 2 to 100 kPa with matrices representative of transitional (tenascin-C and fibronectin) and differentiated environments (laminin and Matrigel). Using live-cell imaging, we found softer tenascin-C-coated substrates significantly enhanced migration and fragmentation of primary newt muscle cells. In contrast, stiffer substrates coated with laminin, Matrigel, or fibronectin increased differentiation while suppressing migration and fragmentation. These data support our in vivo observations that a transitional matrix of reduced stiffness regulates muscle plasticity and progenitor cell recruitment into the regenerative blastema. These new findings will enable the determination of how biochemical and mechanical cues from the ECM control genetic pathways that drive regeneration.
Collapse
Affiliation(s)
| | - Hans-Georg Simon
- Department of Pediatrics, Northwestern University, Feinberg School of Medicine, Children's Memorial Research Center, Chicago, Illinois, USA
| |
Collapse
|
25
|
Tomasi M, Canato M, Paolini C, Dainese M, Reggiani C, Volpe P, Protasi F, Nori A. Calsequestrin (CASQ1) rescues function and structure of calcium release units in skeletal muscles of CASQ1-null mice. Am J Physiol Cell Physiol 2011; 302:C575-86. [PMID: 22049211 DOI: 10.1152/ajpcell.00119.2011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Amplitude of Ca(2+) transients, ultrastructure of Ca(2+) release units, and molecular composition of sarcoplasmic reticulum (SR) are altered in fast-twitch skeletal muscles of calsequestrin-1 (CASQ1)-null mice. To determine whether such changes are directly caused by CASQ1 ablation or are instead the result of adaptive mechanisms, here we assessed ability of CASQ1 in rescuing the null phenotype. In vivo reintroduction of CASQ1 was carried out by cDNA electro transfer in flexor digitorum brevis muscle of the mouse. Exogenous CASQ1 was found to be correctly targeted to the junctional SR (jSR), as judged by immunofluorescence and confocal microscopy; terminal cisternae (TC) lumen was filled with electron dense material and its width was significantly increased, as judged by electron microscopy; peak amplitude of Ca(2+) transients was significantly increased compared with null muscle fibers transfected only with green fluorescent protein (control); and finally, transfected fibers were able to sustain cytosolic Ca(2+) concentration during prolonged tetanic stimulation. Only the expression of TC proteins, such as calsequestrin 2, sarcalumenin, and triadin, was not rescued as judged by Western blot. Thus our results support the view that CASQ1 plays a key role in both Ca(2+) homeostasis and TC structure.
Collapse
Affiliation(s)
- Mirta Tomasi
- Dept. of Experimental Biomedical Sciences, Univ. of Padova, Italy
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Massive alterations of sarcoplasmic reticulum free calcium in skeletal muscle fibers lacking calsequestrin revealed by a genetically encoded probe. Proc Natl Acad Sci U S A 2010; 107:22326-31. [PMID: 21135222 DOI: 10.1073/pnas.1009168108] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The cytosolic free Ca(2+) transients elicited by muscle fiber excitation are well characterized, but little is known about the free [Ca(2+)] dynamics within the sarcoplasmic reticulum (SR). A targetable ratiometric FRET-based calcium indicator (D1ER Cameleon) allowed us to investigate SR Ca(2+) dynamics and analyze the impact of calsequestrin (CSQ) on SR [Ca(2+)] in enzymatically dissociated flexor digitorum brevis muscle fibers from WT and CSQ-KO mice lacking isoform 1 (CSQ-KO) or both isoforms [CSQ-double KO (DKO)]. At rest, free SR [Ca(2+)] did not differ between WT, CSQ-KO, and CSQ-DKO fibers. During sustained contractions, changes were rather small in WT, reflecting powerful buffering of CSQ, whereas in CSQ-KO fibers, significant drops in SR [Ca(2+)] occurred. Their amplitude increased with stimulation frequency between 1 and 60 Hz. At 60 Hz, the SR became virtually depleted of Ca(2+), both in CSQ-KO and CSQ-DKO fibers. In CSQ-KO fibers, cytosolic free calcium detected with Fura-2 declined during repetitive stimulation, indicating that SR calcium content was insufficient for sustained contractile activity. SR Ca(2+) reuptake during and after stimulation trains appeared to be governed by three temporally distinct processes with rate constants of 50, 1-5, and 0.3 s(-1) (at 26 °C), reflecting activity of the SR Ca(2+) pump and interplay of luminal and cytosolic Ca(2+) buffers and pointing to store-operated calcium entry (SOCE). SOCE might play an essential role during muscle contractures responsible for the malignant hyperthermia-like syndrome in mice lacking CSQ.
Collapse
|
27
|
Ogneva IV. Transversal stiffness of fibers and desmin content in leg muscles of rats under gravitational unloading of various durations. J Appl Physiol (1985) 2010; 109:1702-9. [DOI: 10.1152/japplphysiol.00793.2010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of this research was the analysis of structural changes in various parts of the sarcolemma and contractile apparatus of muscle fibers by measuring their transversal stiffness by atomic force microscopy under gravitational unloading. Soleus, medial gastrocnemius, and tibialis anterior muscles of Wistar rats were the objects of the study. Gravitational unloading was carried out by antiorthostatic suspension of hindlimbs for 1, 3, 7, and 12 days. It was shown that the transversal stiffness of different parts of the contractile apparatus of soleus muscle fibers decreases during gravitational unloading in the relaxed, calcium-activated, and rigor states, the fibers of the medial gastrocnemius show no changes, whereas the transversal stiffness of tibialis anterior muscle increases. Thus the transversal stiffness of the sarcolemma in the relaxed state is reduced in all muscles, which may be due to the direct action of gravity as an external mechanical factor that can influence the tension on a membrane. The change of sarcolemma stiffness in activated fibers, which is due probably to the transfer of tension from the contractile apparatus, correlates with the dynamics of changes in the content of desmin.
Collapse
Affiliation(s)
- I. V. Ogneva
- State Scientific Center of Russian Federation Institute of Biomedical Problems of Russian Academy of Sciences, Moscow, Russia
| |
Collapse
|
28
|
Marg A, Haase H, Neumann T, Kouno M, Morano I. AHNAK1 and AHNAK2 are costameric proteins: AHNAK1 affects transverse skeletal muscle fiber stiffness. Biochem Biophys Res Commun 2010; 401:143-8. [PMID: 20833135 DOI: 10.1016/j.bbrc.2010.09.030] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Accepted: 09/04/2010] [Indexed: 11/30/2022]
Abstract
The AHNAK scaffold PDZ-protein family is implicated in various cellular processes including membrane repair; however, AHNAK function and subcellular localization in skeletal muscle are unclear. We used specific AHNAK1 and AHNAK2 antibodies to analyzed the detailed localization of both proteins in mouse skeletal muscle. Co-localization of AHNAK1 and AHNAK2 with vinculin clearly demonstrates that both proteins are components of the costameric network. In contrast, no AHNAK expression was detected in the T-tubule system. A laser wounding assay with AHNAK1-deficient fibers suggests that AHNAK1 is not involved in membrane repair. Using atomic force microscopy (AFM), we observed a significantly higher transverse stiffness of AHNAK1⁻/⁻ fibers. These findings suggest novel functions of AHNAK proteins in skeletal muscle.
Collapse
Affiliation(s)
- Andreas Marg
- Max-Delbrück-Centrum für Molekulare Medizin, D-13092 Berlin, Germany.
| | | | | | | | | |
Collapse
|
29
|
Ogneva IV, Lebedev DV, Shenkman BS. Transversal stiffness and Young's modulus of single fibers from rat soleus muscle probed by atomic force microscopy. Biophys J 2010; 98:418-24. [PMID: 20141755 DOI: 10.1016/j.bpj.2009.10.028] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 10/19/2009] [Accepted: 10/21/2009] [Indexed: 01/20/2023] Open
Abstract
The structural integrity of striated muscle is determined by extra-sarcomere cytoskeleton that includes structures that connect the Z-disks and M-bands of a sarcomere to sarcomeres of neighbor myofibrils or to sarcolemma. Mechanical properties of these structures are not well characterized. The surface structure and transversal stiffness of single fibers from soleus muscle of the rat were studied with atomic force microscopy in liquid. We identified surface regions that correspond to projections of the Z-disks, M-bands, and structures between them. Transversal stiffness of the fibers was measured in each of these three regions. The stiffness was higher in the Z-disk regions, minimal between the Z-disks and the M-bands, and intermediate in the M-band regions. The stiffness increased twofold when relaxed fibers were maximally activated with calcium and threefold when they were transferred to rigor (ATP-free) solution. Transversal stiffness of fibers heavily treated with Triton X-100 was about twice higher than that of the permeabilized ones, however, its regional difference and the dependence on physiological state of the fiber remained the same. The data may be useful for understanding mechanics of muscle fibers when it is subjected to both axial and transversal strain and stress.
Collapse
Affiliation(s)
- Irina V Ogneva
- State Scientific Center of Russian Federation, Institute for Biomedical Problems, Russian Academy of Sciences, Moscow, Russia.
| | | | | |
Collapse
|
30
|
Mechanical and electrophysiological properties of the sarcolemma of muscle fibers in two murine models of muscle dystrophy: col6a1-/- and mdx. J Biomed Biotechnol 2010; 2010:981945. [PMID: 20396399 PMCID: PMC2852614 DOI: 10.1155/2010/981945] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2009] [Accepted: 01/31/2010] [Indexed: 12/02/2022] Open
Abstract
This study aimed to analyse the sarcolemma of Col6a1−/− fibers in comparison with wild type and mdx fibers, taken as positive control in view of the known structural and functional alterations of their membranes. Structural and mechanical properties were studied in single muscle fibers prepared from FDB muscle using atomic force microscopy (AFM) and conventional electrophysiological techniques to measure ionic conductance and capacitance. While the sarcolemma topography was preserved in both types of dystrophic fibers, membrane elasticity was significantly reduced in Col6a1−/− and increased in mdx fibers. In the membrane of Col6a1−/− fibers ionic conductance was increased likely due to an increased leakage, whereas capacitance was reduced, and the action potential (ap) depolarization rate was reduced. The picture emerging from experiments on fibers in culture was consistent with that obtained on intact freshly dissected muscle. Mdx fibers in culture showed a reduction of both membrane conductance and capacitance. In contrast, in mdx intact FDB muscle resting conductance was increased while resting potential and ap depolarization rate were reduced, likely indicating the presence of a consistent population of severely altered fibers which disappear during the culture preparation.
Collapse
|
31
|
Ogneva IV, Lebedev DV, Shenkman BS. Lateral mechanics of muscle fibers and its role in signaling. Biophysics (Nagoya-shi) 2009. [DOI: 10.1134/s0006350909030208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
32
|
Zhu J, Sabharwal T, Kalyanasundaram A, Guo L, Wang G. Topographic mapping and compression elasticity analysis of skinned cardiac muscle fibers in vitro with atomic force microscopy and nanoindentation. J Biomech 2009; 42:2143-50. [PMID: 19640539 PMCID: PMC2808505 DOI: 10.1016/j.jbiomech.2009.05.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2008] [Revised: 05/08/2009] [Accepted: 05/23/2009] [Indexed: 10/20/2022]
Abstract
Surface topography and compression elasticity of bovine cardiac muscle fibers in rigor and relaxing state have been studied with atomic force microscopy. Characteristic sarcomere patterns running along the longitudinal axis of the fibers were clearly observed, and Z-lines, M-lines, I-bands, and A-bands can be distinguished through comparing with TEM images and force curves. AFM height images of fibers had shown a sarcomere length of 1.22+/-0.02 microm (n=5) in rigor with a significant 9% increase in sarcomere length in relaxing state (1.33+/-0.03 microm, n=5), indicating that overlap moves with the changing physiological conditions. Compression elasticity curves along with sarcomere locations have been taken by AFM compression processing. Coefficient of Z-line, I-band, Overlap, and M-line are 25+/-2, 8+/-1, 10+/-1, and 17+/-1.5 pN/nm respectively in rigor state, and 18+/-2.5, 4+/-0.5, 6+/-1, and 11+/-0.5 pN/nm respectively in relaxing state. Young's Modulus in Z-line, I-band, Overlap, and M-line are 115+/-12, 48+/-9, 52+/-8, and 90+/-12 kPa respectively in rigor, and 98+/-10, 23+/-4, 42+/-4, and 65+/-7 kPa respectively in relaxing state. The elasticity curves have shown a similar appearance to the section analysis profile of AFM height images of sarcomere and the distance between adjacent largest coefficient and Young's Modulus is equal to the sarcomere length measured from the AFM height images using section analysis, indicating that mechanic properties of fibers have a similar periodicity to the topography of fibers.
Collapse
Affiliation(s)
- Jie Zhu
- Cardiac Biophysics and Bioengineering Laboratory, College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
- Biophysics Collaborative Access Team, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439-4860, United States
- Pritzker Institute of Biomedical Science & Engineering, Illinois Institute of Technology, Chicago, IL 60616-3793, United States
| | - Tanya Sabharwal
- Pritzker Institute of Biomedical Science & Engineering, Illinois Institute of Technology, Chicago, IL 60616-3793, United States
- Section of Molecular Cell and Developmental Biology, School of Biological Sciences, University of Texas, Austin, TX 78712, United States
| | - Aruna Kalyanasundaram
- Pritzker Institute of Biomedical Science & Engineering, Illinois Institute of Technology, Chicago, IL 60616-3793, United States
| | - Lianhong Guo
- Laboratory of Biomathematics, Department of Applied Mathematics, Northwest A&F University, Yangling, Shaanxi 712100, China
- Department of Applied Mathematics, College of Science and Letters, Illinois Institute of Technology, Chicago, IL 60616, United States
| | - Guodong Wang
- Cardiac Biophysics and Bioengineering Laboratory, College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| |
Collapse
|
33
|
Blaauw B, Canato M, Agatea L, Toniolo L, Mammucari C, Masiero E, Abraham R, Sandri M, Schiaffino S, Reggiani C. Inducible activation of Akt increases skeletal muscle mass and force without satellite cell activation. FASEB J 2009; 23:3896-905. [DOI: 10.1096/fj.09-131870] [Citation(s) in RCA: 173] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bert Blaauw
- Venetian Institute of Molecular Medicine (VIMM) Padova Italy
| | - Marta Canato
- Department of Human Anatomy and Physiology CNR Institute of Neurosciences University of Padova Padova Italy
| | - Lisa Agatea
- Venetian Institute of Molecular Medicine (VIMM) Padova Italy
- Department of Biomedical Sciences CNR Institute of Neurosciences University of Padova Padova Italy
| | - Luana Toniolo
- Department of Human Anatomy and Physiology CNR Institute of Neurosciences University of Padova Padova Italy
| | - Cristina Mammucari
- Department of Biomedical Sciences CNR Institute of Neurosciences University of Padova Padova Italy
| | - Eva Masiero
- Venetian Institute of Molecular Medicine (VIMM) Padova Italy
- Department of Biomedical Sciences CNR Institute of Neurosciences University of Padova Padova Italy
| | - Reimar Abraham
- Venetian Institute of Molecular Medicine (VIMM) Padova Italy
| | - Marco Sandri
- Venetian Institute of Molecular Medicine (VIMM) Padova Italy
- Department of Biomedical Sciences CNR Institute of Neurosciences University of Padova Padova Italy
- Dulbecco Telethon Institute Rome Italy
| | - Stefano Schiaffino
- Venetian Institute of Molecular Medicine (VIMM) Padova Italy
- Department of Biomedical Sciences CNR Institute of Neurosciences University of Padova Padova Italy
| | - Carlo Reggiani
- Department of Human Anatomy and Physiology CNR Institute of Neurosciences University of Padova Padova Italy
- Department of Biomedical Sciences CNR Institute of Neurosciences University of Padova Padova Italy
| |
Collapse
|
34
|
Zhu J, Sabharwal T, Guo L, Kalyanasundaram A, Wang G. Gloss phenomena and image analysis of atomic force microscopy in molecular and cell biology. SCANNING 2009; 31:49-58. [PMID: 19191267 PMCID: PMC2808506 DOI: 10.1002/sca.20133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Proper sample preparation, scan setup, data collection and image analysis are key factors in successful atomic force microscopy (AFM), which can avoid gloss phenomena effectively from unreasonable manipulations or instrumental defaults. Fresh cleaved mica and newly treated glass cover were checked first as the substrates for all of the sample preparation for AFM. Then, crystals contamination from buffer was studied separately or combined with several biologic samples, and the influence of scanner, scan mode and cantilever to data collection was also discussed intensively using molecular and cellular samples. At last, images treatment and analysis with off-line software had been focused on standard and biologic samples, and artificial glosses were highly considered for their high probability. SCANNING 31: 49-58, 2009. (c) 2009 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Jie Zhu
- Cardiac Biophysics and Bioengineering Laboratory, College of Science, Northwest A&F University, Yangling, Shaanxi, China.
| | | | | | | | | |
Collapse
|
35
|
Dainese M, Quarta M, Lyfenko AD, Paolini C, Canato M, Reggiani C, Dirksen RT, Protasi F. Anesthetic- and heat-induced sudden death in calsequestrin-1-knockout mice. FASEB J 2009; 23:1710-20. [PMID: 19237502 DOI: 10.1096/fj.08-121335] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Calsequestrin-1 (CASQ1) is a moderate-affinity, high-capacity Ca(2+)-binding protein in the sarcoplasmic reticulum (SR) terminal cisternae of skeletal muscle. CASQ1 functions as both a Ca(2+)-binding protein and a luminal regulator of ryanodine receptor (RYR1)-mediated Ca(2+) release. Mice lacking skeletal CASQ1 are viable but exhibit reduced levels of releasable Ca(2+) and altered contractile properties. Here we report that CASQ1-null mice exhibit increased spontaneous mortality and susceptibility to heat- and anesthetic-induced sudden death. Exposure of CASQ1-null mice to either 2% halothane or heat stress triggers lethal episodes characterized by whole-body contractures, elevated core temperature, and severe rhabdomyolysis, which are prevented by prior dantrolene administration. The characteristics of these events are remarkably similar to analogous episodes observed in humans with malignant hyperthermia (MH) and animal models of MH and environmental heat stroke (EHS). In vitro studies indicate that CASQ1-null muscle exhibits increased contractile sensitivity to temperature and caffeine, temperature-dependent increases in resting Ca(2+), and an increase in the magnitude of depolarization-induced Ca(2+) release. These results demonstrate that CASQ1 deficiency alters proper control of RYR1 function and suggest CASQ1 as a potential candidate gene for linkage analysis in families with MH/EHS where mutations in the RYR1 gene are excluded.
Collapse
Affiliation(s)
- Marco Dainese
- Ce.S.I.-Department of Basic and Applied Medical Sciences, Interuniversity Institute of Myology, University G. d'Annunzio, I-66013 Chieti, Italy
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Chen HH, Lintner DM, Luo ZP. Observation of the ultrastructure of anterior cruciate ligament graft by atomic force microscopy. SCANNING 2009; 31:19-23. [PMID: 19177443 DOI: 10.1002/sca.20137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This study presented the fibril ultrastructure of retrieved grafts from the reconstruction of anterior cruciate ligament (ACL) using atomic force microscopy (AFM). The tapping mode images of the AFM were taken from different areas of the longitudinally cut grafts. Regular arrangement of collagen fibrils was found in certain areas of the graft. In many areas, however, the fibrils were not well arranged in a single direction, with some smaller fibrils oriented vertically to larger parallel fibrils. The crossing and tangling of fibrils in ACL grafts was well represented in the three-dimensional AFM image. This abnormality of graft ultrastructure might indicate the possible alteration of the mechanical environment after ACL reconstruction. This study demonstrated the suitability and importance of ultrastructure observation of ACL grafts by AFM.
Collapse
Affiliation(s)
- Hsiang-Ho Chen
- Department of Physiology, Taipei Medical University, Taipei, Taiwan.
| | | | | |
Collapse
|
37
|
Ogneva IV, Lebedev DV, Isaev-Ivanov VV, Shenkman BS. Spatial distribution of the transverse stiffness of relaxed and activated rat soleus muscle fibers. Biophysics (Nagoya-shi) 2008. [DOI: 10.1134/s0006350908060250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
|
38
|
Paolini C, Quarta M, Nori A, Boncompagni S, Canato M, Volpe P, Allen PD, Reggiani C, Protasi F. Reorganized stores and impaired calcium handling in skeletal muscle of mice lacking calsequestrin-1. J Physiol 2007; 583:767-84. [PMID: 17627988 PMCID: PMC2277031 DOI: 10.1113/jphysiol.2007.138024] [Citation(s) in RCA: 123] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Calsequestrin (CS), the major Ca(2+)-binding protein in the sarcoplasmic reticulum (SR), is thought to play a dual role in excitation-contraction coupling: buffering free Ca(2+) increasing SR capacity, and modulating the activity of the Ca(2+) release channels (RyRs). In this study, we generated and characterized the first murine model lacking the skeletal CS isoform (CS1). CS1-null mice are viable and fertile, even though skeletal muscles appear slightly atrophic compared to the control mice. No compensatory increase of the cardiac isoform CS2 is detectable in any type of skeletal muscle. CS1-null muscle fibres are characterized by structural and functional changes, which are much more evident in fast-twitch muscles (EDL) in which most fibres express only CS1, than in slow-twitch muscles (soleus), where CS2 is expressed in about 50% of the fibres. In isolated EDL muscle, force development is preserved, but characterized by prolonged time-to-peak and half-relaxation time, probably related to impaired calcium release from and re-uptake by the SR. Ca(2+)-imaging studies show that the amount of Ca(2+) released from the SR and the amplitude of the Ca(2+) transient are significantly reduced. The lack of CS1 also causes significant ultrastructural changes, which include: (i) striking proliferation of SR junctional domains; (ii) increased density of Ca(2+)-release channels (confirmed also by (3)H-ryanodine binding); (iii) decreased SR terminal cisternae volume; (iv) higher density of mitochondria. Taken together these results demonstrate that CS1 is essential for the normal development of the SR and its calcium release units and for the storage and release of appropriate amounts of SR Ca(2+).
Collapse
Affiliation(s)
- Cecilia Paolini
- IIM Interuniversity Institute of Myology, Ce.S.I. Centro Science dell'Invecchiamento, University G. d' Annunzio, I-66013 Chieti, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Awizio AK, Onofri F, Benfenati F, Bonaccurso E. Influence of synapsin I on synaptic vesicles: an analysis by force-volume mode of the atomic force microscope and dynamic light scattering. Biophys J 2007; 93:1051-60. [PMID: 17483172 PMCID: PMC1913160 DOI: 10.1529/biophysj.107.104406] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Synaptic vesicles (SVs) are small neuronal organelles that store neurotransmitters and release them by exocytosis into the synaptic cleft for signal transmission between nerve cells. They consist of a highly curved membrane composed of different lipids containing several proteins with specific functions. A family of abundant extrinsic SV proteins, the synapsins, interact with SV proteins and phospholipids and play an important role in the regulation of SV trafficking and stability. We investigated the interactions of one these proteins with the SV membrane using atomic force microscope and dynamic light scattering. We examined SVs isolated from rat forebrain both under native conditions and after depletion of endogenous synapsin I. We used the atomic force microscope in two modes: imaging mode for characterizing the shape and size of SVs, and force-volume mode for characterizing their stiffness. Synapsin-depleted SVs were larger in size and showed a higher tendency to aggregate than native vesicles, although their stiffness was not significantly different. Because synapsins are believed to cross-link SV to each other and to the actin cytoskeleton, we also measured the SV aggregation kinetics induced by synapsin I by dynamic light scattering and atomic force microscopy and found that the addition of synapsin I promotes a rapid aggregation of SVs. The data indicate that synapsin directly affects SV stability and aggregation state and support the physiological role of synapsins in the assembly and regulation of SV pools within nerve terminals.
Collapse
|
40
|
Milner DJ, Kaufman SJ. Alpha7beta1 integrin does not alleviate disease in a mouse model of limb girdle muscular dystrophy type 2F. THE AMERICAN JOURNAL OF PATHOLOGY 2007; 170:609-19. [PMID: 17255329 PMCID: PMC1851849 DOI: 10.2353/ajpath.2007.060686] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Transgenic expression of the alpha7beta1 integrin in the dystrophic mdx/utr-/- mouse decreases development of muscular dystrophy and enhances longevity. To explore the possibility that elevating alpha7beta1 integrin expression could also ameliorate different forms of muscular dystrophy, we used transgenic technology to enhance integrin expression in mice lacking delta-sarcoglycan (delta sgc), a mouse model for human limb girdle muscular dystrophy type 2F. Unlike alpha7 transgenic mdx/utr-/- mice, enhanced alpha7beta1 integrin expression in the delta sgc-null mouse did not alleviate muscular dystrophy in these animals. Expression of the transgene in the delta sgc-null did not alleviate dystrophic histopathology, nor did it decrease cardiomyopathy or restore exercise tolerance. One hallmark of integrin-mediated alleviation of muscular dystrophy in the mdx/utr-/- background is the restoration of myotendinous junction integrity. As assessed by atomic force microscopy, myotendinous junctions from normal and delta sgc-null mice were indistinguishable, thus suggesting the important influence of myotendinous junction integrity on the severity of muscular dystrophy and providing a possible explanation for the inability of enhanced integrin expression to alleviate dystrophy in the delta sgc-null mouse. These results suggest that distinct mechanisms underlie the development of the diseases that arise from deficiencies in dystrophin and sarcoglycan.
Collapse
Affiliation(s)
- Derek J Milner
- Department of Cell and Developmental Biology, University of Illinois, B107 Chemical and Life Sciences Laboratory, 601 South Goodwin Ave., Urbana, IL 61801, USA
| | | |
Collapse
|
41
|
Madl J, Rhode S, Stangl H, Stockinger H, Hinterdorfer P, Schütz GJ, Kada G. A combined optical and atomic force microscope for live cell investigations. Ultramicroscopy 2006; 106:645-51. [PMID: 16677764 DOI: 10.1016/j.ultramic.2005.12.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2005] [Accepted: 12/01/2005] [Indexed: 10/24/2022]
Abstract
We present an easy-to-use combination of an atomic force microscope (AFM) and an epi-fluorescence microscope, which allows live cell imaging under physiological conditions. High-resolution AFM images were acquired while simultaneously monitoring either the fluorescence image of labeled membrane components, or a high-contrast optical image (DIC, differential interference contrast). By applying two complementary techniques at the same time, additional information and correlations between structure and function of living organisms were obtained. The synergy effects between fluorescence imaging and AFM were further demonstrated by probing fluorescence-labeled receptor clusters in the cell membrane via force spectroscopy using antibody-functionalized tips. The binding probability on receptor-containing areas identified with fluorescence microscopy ("receptor-positive sites") was significantly higher than that on sites lacking receptors.
Collapse
Affiliation(s)
- Josef Madl
- Institute for Biophysics, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| | | | | | | | | | | | | |
Collapse
|