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Usui Y, Hanashima A, Hashimoto K, Kimoto M, Ohira M, Mohri S. Comparative analysis of ventricular stiffness across species. Physiol Rep 2024; 12:e16013. [PMID: 38644486 PMCID: PMC11033294 DOI: 10.14814/phy2.16013] [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: 09/20/2023] [Revised: 04/01/2024] [Accepted: 04/01/2024] [Indexed: 04/23/2024] Open
Abstract
Investigating ventricular diastolic properties is crucial for understanding the physiological cardiac functions in organisms and unraveling the pathological mechanisms of cardiovascular disorders. Ventricular stiffness, a fundamental parameter that defines ventricular diastolic functions in chordates, is typically analyzed using the end-diastolic pressure-volume relationship (EDPVR). However, comparing ventricular stiffness accurately across chambers of varying maximum volume capacities has been a long-standing challenge. As one of the solutions to this problem, we propose calculating a relative ventricular stiffness index by applying an exponential approximation formula to the EDPVR plot data of the relationship between ventricular pressure and values of normalized ventricular volume by the ventricular weight. This article reviews the potential, utility, and limitations of using normalized EDPVR analysis in recent studies. Herein, we measured and ranked ventricular stiffness in differently sized and shaped chambers using ex vivo ventricular pressure-volume analysis data from four animals: Wistar rats, red-eared slider turtles, masu salmon, and cherry salmon. Furthermore, we have discussed the mechanical effects of intracellular and extracellular viscoelastic components, Titin (Connectin) filaments, collagens, physiological sarcomere length, and other factors that govern ventricular stiffness. Our review provides insights into the comparison of ventricular stiffness in different-sized ventricles between heterologous and homologous species, including non-model organisms.
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Grants
- JP22K15155 Japan Society for the Promotion of Science, Grant/Award Number
- JP20K21453 Japan Society for the Promotion of Science, Grant/Award Number
- JP20H04508 Japan Society for the Promotion of Science, Grant/Award Number
- JP21K19933 Japan Society for the Promotion of Science, Grant/Award Number
- JP20H04521 Japan Society for the Promotion of Science, Grant/Award Number
- JP17H02092 Japan Society for the Promotion of Science, Grant/Award Number
- JP23H00556 Japan Society for the Promotion of Science, Grant/Award Number
- JP17H06272 Japan Society for the Promotion of Science, Grant/Award Number
- JP17H00859 Japan Society for the Promotion of Science, Grant/Award Number
- JP25560214 Japan Society for the Promotion of Science, Grant/Award Number
- JP16K01385 Japan Society for the Promotion of Science, Grant/Award Number
- JP26282127 Japan Society for the Promotion of Science, Grant/Award Number
- The Futaba research grant program
- Research Grant from the Kawasaki Foundation in 2016 from Medical Science and Medical Welfare
- Medical Research Grant in 2010 from Takeda Science Foundation
- R03S005 Research Project Grant from Kawasaki Medical School
- R03B050 Research Project Grant from Kawasaki Medical School
- R01B054 Research Project Grant from Kawasaki Medical School
- H30B041 Research Project Grant from Kawasaki Medical School
- H30B016 Research Project Grant from Kawasaki Medical School
- H27B10 Research Project Grant from Kawasaki Medical School
- R02B039 Research Project Grant from Kawasaki Medical School
- H28B80 Research Project Grant from Kawasaki Medical School
- R05B016 Research Project Grant from Kawasaki Medical School
- Japan Society for the Promotion of Science, Grant/Award Number
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Affiliation(s)
- Yuu Usui
- First Department of PhysiologyKawasaki Medical SchoolKurashikiOkayamaJapan
| | - Akira Hanashima
- First Department of PhysiologyKawasaki Medical SchoolKurashikiOkayamaJapan
| | - Ken Hashimoto
- First Department of PhysiologyKawasaki Medical SchoolKurashikiOkayamaJapan
| | - Misaki Kimoto
- First Department of PhysiologyKawasaki Medical SchoolKurashikiOkayamaJapan
| | - Momoko Ohira
- First Department of PhysiologyKawasaki Medical SchoolKurashikiOkayamaJapan
| | - Satoshi Mohri
- First Department of PhysiologyKawasaki Medical SchoolKurashikiOkayamaJapan
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Wang K, Pu Y, Chen L, Hoshino M, Uesugi K, Yagi N, Chen X, Usui Y, Hanashima A, Hashimoto K, Mohri S, Pierscionek BK. Optical development in the murine eye lens of accelerated senescence-prone SAMP8 and senescence-resistant SAMR1 strains. Exp Eye Res 2024; 241:109858. [PMID: 38467176 DOI: 10.1016/j.exer.2024.109858] [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: 01/07/2024] [Revised: 02/28/2024] [Accepted: 03/08/2024] [Indexed: 03/13/2024]
Abstract
The eye lens is responsible for focusing objects at various distances onto the retina and its refractive power is determined by its surface curvature as well as its internal gradient refractive index (GRIN). The lens continues to grow with age resulting in changes to the shape and to the GRIN profile. The present study aims to investigate how the ageing process may influence lens optical development. Murine lenses of accelerated senescence-prone strain (SAMP8) aged from 4 to 50 weeks; senescence-resistant strain (SAMR1) aged from 5 to 52 weeks as well as AKR strain (served as control) aged from 6 to 70 weeks were measured using the X-ray interferometer at the SPring-8 synchrotron Japan within three consecutive years from 2020 to 2022. Three dimensional distributions of the lens GRIN were reconstructed using the measured data and the lens shapes were determined using image segmentation in MatLab. Variations in the parameters describing the lens shape and the GRIN profile with age were compared amongst three mouse strains. With advancing age, both the lens anterior and posterior surface flattens and the lens sagittal thickness increase in all three mouse strains (Anterior radius of curvature increase at 0.008 mm/week, 0.007 mm/week and 0.002 mm/week while posterior radius of curvature increase at 0.002 mm/week, 0.007 mm/week and 0.003 mm/week respectively in AKR, SAMP8 and SAMR1 lenses). Compared with the AKR strain, the SAMP8 samples demonstrate a higher rate of increase in the posterior curvature radius (0.007 mm/week) and the thickness (0.015 mm/week), whilst the SAMR1 samples show slower increases in the anterior curvature radius (0.002 mm/week) and its thickness (0.013 mm/week). There are similar age-related trends in GRIN shape in the radial direction (in all three types of murine lenses nr2 and nr6 increase with age while nr4 decrease with age consistently) but not in the axial direction amongst three mouse strains (nz1 of AKR lens decrease while of SAMP8 and SAMR1 increase with age; nz2 of all three models increase with age; nz3 of AKR lens increase while of SAMP8 and SAMR1 decrease with age). The ageing process can influence the speed of lens shape change and affect the GRIN profile mainly in the axial direction, contributing to an accelerated decline rate of the optical power in the senescence-prone strain (3.5 D/week compared to 2.3 D/week in the AKR control model) but a retardatory decrease in the senescence-resistant strain (2.1 D/week compared to the 2.3D/week in the AKR control model).
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Affiliation(s)
- Kehao Wang
- School of Engineering Medicine and School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Yutian Pu
- School of Engineering Medicine and School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Leran Chen
- Peking University First Hospital, Beijing, China.
| | - Masato Hoshino
- Japan Synchrotron Radiation Research Institute (Spring-8), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan.
| | - Kentaro Uesugi
- Japan Synchrotron Radiation Research Institute (Spring-8), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan.
| | - Naoto Yagi
- Japan Synchrotron Radiation Research Institute (Spring-8), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan.
| | - Xiaoyong Chen
- Department of Ophthalmology, Peking University Third Hospital, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, China.
| | - Yuu Usui
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, Japan.
| | - Akira Hanashima
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, Japan.
| | - Ken Hashimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, Japan.
| | - Satoshi Mohri
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, Japan.
| | - Barbara K Pierscionek
- Faculty of Health, Education, Medicine and Social Care, Medical Technology Research Centre, Anglia Ruskin University, Bishops Hall Lane, Chelmsford, United Kingdom.
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Usui Y, Kimoto M, Hanashima A, Hashimoto K, Mohri S. Cardiac hemodynamics and ventricular stiffness of sea-run cherry salmon (Oncorhynchus masou masou) differ critically from those of landlocked masu salmon. PLoS One 2022; 17:e0267264. [PMID: 36331913 PMCID: PMC9635730 DOI: 10.1371/journal.pone.0267264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022] Open
Abstract
Ventricular diastolic mechanical properties are important determinants of cardiac function and are optimized by changes in cardiac structure and physical properties. Oncorhynchus masou masou is an anadromous migratory fish of the Salmonidae family, and several ecological studies on it have been conducted; however, the cardiac functions of the fish are not well known. Therefore, we investigated ventricular diastolic function in landlocked (masu salmon) and sea-run (cherry salmon) types at 29–30 months post fertilization. Pulsed-wave Doppler echocardiography showed that the atrioventricular inflow waveforms of cherry salmon were biphasic with early diastolic filling and atrial contraction, whereas those of masu salmon were monophasic with atrial contraction. In addition, end-diastolic pressure–volume relationship analysis revealed that the dilatability per unit myocardial mass of the ventricle in cherry salmon was significantly suppressed compared to that in masu salmon, suggesting that the ventricle of the cherry salmon was relatively stiffer (relative ventricular stiffness index; p = 0.0263). Contrastingly, the extensibility of cardiomyocytes, characterized by the expression pattern of Connectin isoforms in their ventricles, was similar in both types. Histological analysis showed that the percentage of the collagen accumulation area in the compact layer of cherry salmon increased compared with that of the masu salmon, which may contribute to ventricle stiffness. Although the heart mass of cherry salmon was about 11-fold greater than that of masu salmon, there was no difference in the morphology of the isolated cardiomyocytes, suggesting that the heart of the cherry salmon grows by cardiomyocyte proliferation, but not cell hypertrophy. The cardiac physiological function of the teleosts varies with differences in their developmental processes and life history. Our multidimensional analysis of the O. masou heart may provide a clue to the process by which the heart acquires a biphasic blood-filling pattern, i.e., a ventricular diastolic suction.
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Affiliation(s)
- Yuu Usui
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Japan
- * E-mail:
| | - Misaki Kimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Japan
| | - Akira Hanashima
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Japan
| | - Ken Hashimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Japan
| | - Satoshi Mohri
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Japan
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4
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Hashimoto K, Kodama A, Ohira M, Kimoto M, Nakagawa R, Usui Y, Ujihara Y, Hanashima A, Mohri S. Postnatal expression of cell cycle promoter Fam64a causes heart dysfunction by inhibiting cardiomyocyte differentiation through repression of Klf15. iScience 2022; 25:104337. [PMID: 35602953 PMCID: PMC9118685 DOI: 10.1016/j.isci.2022.104337] [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: 09/21/2021] [Revised: 04/07/2022] [Accepted: 04/26/2022] [Indexed: 12/03/2022] Open
Abstract
Introduction of fetal cell cycle genes into damaged adult hearts has emerged as a promising strategy for stimulating proliferation and regeneration of postmitotic adult cardiomyocytes. We have recently identified Fam64a as a fetal-specific cell cycle promoter in cardiomyocytes. Here, we analyzed transgenic mice maintaining cardiomyocyte-specific postnatal expression of Fam64a when endogenous expression was abolished. Despite an enhancement of cardiomyocyte proliferation, these mice showed impaired cardiomyocyte differentiation during postnatal development, resulting in cardiac dysfunction in later life. Mechanistically, Fam64a inhibited cardiomyocyte differentiation by repressing Klf15, leading to the accumulation of undifferentiated cardiomyocytes. In contrast, introduction of Fam64a in differentiated adult wildtype hearts improved functional recovery upon injury with augmented cell cycle and no dedifferentiation in cardiomyocytes. These data demonstrate that Fam64a inhibits cardiomyocyte differentiation during early development, but does not induce de-differentiation in once differentiated cardiomyocytes, illustrating a promising potential of Fam64a as a cell cycle promoter to attain heart regeneration. Overexpression of cell cycle promoter Fam64a in cardiomyocytes causes heart failure Fam64a inhibits cardiomyocyte differentiation during development by repressing Klf15 Transient and local induction of Fam64a in adult hearts improves recovery upon injury Fam64a activates cardiomyocyte cell cycle without dedifferentiation upon injury
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Affiliation(s)
- Ken Hashimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Aya Kodama
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Momoko Ohira
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Misaki Kimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Reiko Nakagawa
- Laboratory for Phyloinformatics, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe 650-0047, Japan
| | - Yuu Usui
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Yoshihiro Ujihara
- Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
| | - Akira Hanashima
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Satoshi Mohri
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
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Nishikawa A, Hanashima A, Nakayama S, Ogasawara M, Kimura S. Transcripts of the nebulin gene from Ciona heart and their implications for the evolution of nebulin family genes. Gene X 2019; 716:144036. [DOI: 10.1016/j.gene.2019.144036] [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] [Received: 04/16/2019] [Revised: 07/27/2019] [Accepted: 07/31/2019] [Indexed: 10/26/2022] Open
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6
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Hanashima A, Kawamura Y, Nakauchi Y. A great legacy of muscle research and education from Dr. Sumiko Kimura. Cytoskeleton (Hoboken) 2019; 76:298-302. [PMID: 31152497 DOI: 10.1002/cm.21542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 04/10/2019] [Revised: 05/16/2019] [Accepted: 05/28/2019] [Indexed: 11/07/2022]
Abstract
Dr. Sumiko Kimura, a former professor of biology at Chiba University, was known as a distinguished biochemist who contributed considerably to our knowledge about the cytoskeleton of muscle cells, especially through her work on connectin (also called titin) and actin regulatory proteins. Sadly, she suddenly passed away in Tokyo on November 1, 2018 at the age of 71. She succumbed to multiple organ failure caused by a bacterial infection following a third operation on her heart. Dr. Kimura had been continuing her research into connectin right up until several months before her decease.
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Affiliation(s)
- Akira Hanashima
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Japan
| | - Yuuki Kawamura
- Faculty of Medicine, Department of Liberal Arts (Biology), Saitama Medical University, Moroyama, Japan
| | - Yuni Nakauchi
- Faculty of Science, Department of Science (Biology), Yamagata University, Yamagata, Japan
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Hashimoto K, Kodama A, Honda T, Hanashima A, Ujihara Y, Murayama T, Nishimatsu SI, Mohri S. Fam64a is a novel cell cycle promoter of hypoxic fetal cardiomyocytes in mice. Sci Rep 2017; 7:4486. [PMID: 28667270 PMCID: PMC5493652 DOI: 10.1038/s41598-017-04823-1] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 05/22/2017] [Indexed: 01/22/2023] Open
Abstract
Fetal cardiomyocytes actively proliferate to form the primitive heart in utero in mammals, but they stop dividing shortly after birth. The identification of essential molecules maintaining this active cardiomyocyte proliferation is indispensable for potential adult heart regeneration. A recent study has shown that this proliferation depends on a low fetal oxygen condition before the onset of breathing at birth. We have established an isolation protocol for mouse fetal cardiomyocytes, performed under strict low oxygen conditions to mimic the intrauterine environment, that gives the highest proliferative activities thus far reported. Oxygen exposure during isolation/culture markedly inhibited cell division and repressed cell cycle-promoting genes, and subsequent genome-wide analysis identified Fam64a as a novel regulatory molecule. Fam64a was abundantly expressed in hypoxic fetal cardiomyocyte nuclei, but this expression was drastically repressed by oxygen exposure, and in postnatal cardiomyocytes following the onset of breathing and the resulting elevation of oxygen tension. Fam64a knockdown inhibited and its overexpression enhanced cardiomyocyte proliferation. Expression of a non-degradable Fam64a mutant suggested that optimum Fam64a expression and subsequent degradation by anaphase-promoting complex/cyclosome (APC/C) during the metaphase-to-anaphase transition are required for fetal cardiomyocyte division. We propose that Fam64a is a novel cell cycle promoter of hypoxic fetal cardiomyocytes in mice.
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Affiliation(s)
- Ken Hashimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan.
| | - Aya Kodama
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Takeshi Honda
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan.,Department of Cardiovascular Surgery, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Akira Hanashima
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Yoshihiro Ujihara
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Takashi Murayama
- Department of Cellular and Molecular Pharmacology, Juntendo University, Tokyo, 113-8421, Japan
| | - Shin-Ichiro Nishimatsu
- Department of Molecular and Developmental Biology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Satoshi Mohri
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
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8
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Hanashima A, Hashimoto K, Ujihara Y, Honda T, Yobimoto T, Kodama A, Mohri S. Complete primary structure of the I-band region of connectin at which mechanical property is modulated in zebrafish heart and skeletal muscle. Gene 2017; 596:19-26. [PMID: 27725266 DOI: 10.1016/j.gene.2016.10.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 08/22/2016] [Revised: 09/23/2016] [Accepted: 10/06/2016] [Indexed: 10/20/2022]
Abstract
Connectin, also called titin, is the largest protein with a critical function as a molecular spring during contraction and relaxation of striated muscle; its mutation leads to severe myopathy and cardiomyopathy. To uncover the cause of this pathogenesis, zebrafish have recently been used as disease models because they are easier to genetically modify than mice. Although the gene structures and putative primary structures of zebrafish connectin have been determined, the actual primary structures of zebrafish connectin in heart and skeletal muscles remain unclear because of its large size and the PCR amplification-associated difficulties. In this research, using RT-PCR amplification from zebrafish heart and skeletal muscles, we determined the complete primary structures of zebrafish connectin in the I-band region at which mechanical property is modulated by alternative splicing. Our results showed that the domain structures of zebrafish connectins were largely similar to those of human connectins; however, the splicing pathways in the middle-Ig segment and the PEVK segment were highly diverse in every isoform. We also found that a set of 10 Ig domains in the middle-Ig segment of zebrafish connectin had been triplicated in human connectin. Because these triplicate regions are expressed in human leg and diaphragm, our findings may provide insight into the establishment of walking with limbs and lung respiration during tetrapod evolution.
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Affiliation(s)
- Akira Hanashima
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan.
| | - Ken Hashimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Yoshihiro Ujihara
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Takeshi Honda
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Tomoko Yobimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Aya Kodama
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
| | - Satoshi Mohri
- First Department of Physiology, Kawasaki Medical School, Kurashiki 701-0192, Japan
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Hanashima A, Sato N, Kimura S, Sakurai T, Murayama T. Proteins in Striated Muscles that Transcribed from the Contiguous Region of Connectin Gene. Biophys J 2015. [DOI: 10.1016/j.bpj.2014.11.2303] [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: 11/16/2022] Open
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10
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Franke B, Gasch A, Rodriguez D, Chami M, Khan MM, Rudolf R, Bibby J, Hanashima A, Bogomolovas J, von Castelmur E, Rigden DJ, Uson I, Labeit S, Mayans O. Molecular basis for the fold organization and sarcomeric targeting of the muscle atrogin MuRF1. Open Biol 2014; 4:130172. [PMID: 24671946 PMCID: PMC3971405 DOI: 10.1098/rsob.130172] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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] [Indexed: 01/10/2023] Open
Abstract
MuRF1 is an E3 ubiquitin ligase central to muscle catabolism. It belongs to the TRIM protein family characterized by a tripartite fold of RING, B-box and coiled-coil (CC) motifs, followed by variable C-terminal domains. The CC motif is hypothesized to be responsible for domain organization in the fold as well as for high-order assembly into functional entities. But data on CC from this family that can clarify the structural significance of this motif are scarce. We have characterized the helical region from MuRF1 and show that, contrary to expectations, its CC domain assembles unproductively, being the B2- and COS-boxes in the fold (respectively flanking the CC) that promote a native quaternary structure. In particular, the C-terminal COS-box seemingly forms an α-hairpin that packs against the CC, influencing its dimerization. This shows that a C-terminal variable domain can be tightly integrated within the conserved TRIM fold to modulate its structure and function. Furthermore, data from transfected muscle show that in MuRF1 the COS-box mediates the in vivo targeting of sarcoskeletal structures and points to the pharmacological relevance of the COS domain for treating MuRF1-mediated muscle atrophy.
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Affiliation(s)
- Barbara Franke
- Institute of Integrative Biology, University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB, UK
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Hanashima A, Kimura S, Murayama T. Localization and Binding Partners of SESTD1 in Skeletal Muscles. Biophys J 2014. [DOI: 10.1016/j.bpj.2013.11.4214] [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: 10/23/2022] Open
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Khan MM, Strack S, Wild F, Hanashima A, Gasch A, Brohm K, Reischl M, Carnio S, Labeit D, Sandri M, Labeit S, Rudolf R. Role of autophagy, SQSTM1, SH3GLB1, and TRIM63 in the turnover of nicotinic acetylcholine receptors. Autophagy 2013; 10:123-36. [PMID: 24220501 DOI: 10.4161/auto.26841] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [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: 11/19/2022] Open
Abstract
Removal of ubiquitinated targets by autophagosomes can be mediated by receptor molecules, like SQSTM1, in a mechanism referred to as selective autophagy. While cytoplasmic protein aggregates, mitochondria, and bacteria are the best-known targets of selective autophagy, their role in the turnover of membrane receptors is scarce. We here showed that fasting-induced wasting of skeletal muscle involves remodeling of the neuromuscular junction (NMJ) by increasing the turnover of muscle-type CHRN (cholinergic receptor, nicotinic/nicotinic acetylcholine receptor) in a TRIM63-dependent manner. Notably, this process implied enhanced production of endo/lysosomal carriers of CHRN, which also contained the membrane remodeler SH3GLB1, the E3 ubiquitin ligase, TRIM63, and the selective autophagy receptor SQSTM1. Furthermore, these vesicles were surrounded by the autophagic marker MAP1LC3A in an ATG7-dependent fashion, and some of them were also positive for the lysosomal marker, LAMP1. While the amount of vesicles containing endocytosed CHRN strongly augmented in the absence of ATG7 as well as upon denervation as a model for long-term atrophy, denervation-induced increase in autophagic CHRN vesicles was completely blunted in the absence of TRIM63. On a similar note, in trim63(-/-) mice denervation-induced upregulation of SQSTM1 and LC3-II was abolished and endogenous SQSTM1 did not colocalize with CHRN vesicles as it did in the wild type. SQSTM1 and LC3-II coprecipitated with surface-labeled/endocytosed CHRN and SQSTM1 overexpression significantly induced CHRN vesicle formation. Taken together, our data suggested that selective autophagy regulates the basal and atrophy-induced turnover of the pentameric transmembrane protein, CHRN, and that TRIM63, together with SH3GLB1 and SQSTM1 regulate this process.
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Affiliation(s)
- Muzamil Majid Khan
- Institute of Toxicology and Genetics; Karlsruhe Institute of Technology; Eggenstein-Leopoldshafen, Germany
| | - Siegfried Strack
- Institute of Toxicology and Genetics; Karlsruhe Institute of Technology; Eggenstein-Leopoldshafen, Germany
| | - Franziska Wild
- Institute of Toxicology and Genetics; Karlsruhe Institute of Technology; Eggenstein-Leopoldshafen, Germany
| | - Akira Hanashima
- Department of Integrative Pathophysiology; Universitätsmedizin Mannheim; Mannheim, Germany
| | - Alexander Gasch
- Department of Integrative Pathophysiology; Universitätsmedizin Mannheim; Mannheim, Germany
| | - Kathrin Brohm
- Department of Integrative Pathophysiology; Universitätsmedizin Mannheim; Mannheim, Germany
| | - Markus Reischl
- Institute of Applied Informatics; Karlsruhe Institute of Technology; Eggenstein-Leopoldshafen, Germany
| | - Silvia Carnio
- Venetian Institute of Molecular Medicine; Padova, Italy
| | - Dittmar Labeit
- Department of Integrative Pathophysiology; Universitätsmedizin Mannheim; Mannheim, Germany
| | - Marco Sandri
- Venetian Institute of Molecular Medicine; Padova, Italy
| | - Siegfried Labeit
- Department of Integrative Pathophysiology; Universitätsmedizin Mannheim; Mannheim, Germany
| | - Rüdiger Rudolf
- Institute of Toxicology and Genetics; Karlsruhe Institute of Technology; Eggenstein-Leopoldshafen, Germany; Institute of Molecular and Cell Biology; University of Applied Sciences Mannheim; Mannheim, Germany; Institute of Medical Technology; University of Heidelberg and University of Applied Sciences Mannheim; Mannheim, Germany
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Rudolf R, Bogomolovas J, Strack S, Choi KR, Khan MM, Wagner A, Brohm K, Hanashima A, Gasch A, Labeit D, Labeit S. Regulation of nicotinic acetylcholine receptor turnover by MuRF1 connects muscle activity to endo/lysosomal and atrophy pathways. Age (Dordr) 2013; 35:1663-1674. [PMID: 22956146 PMCID: PMC3776120 DOI: 10.1007/s11357-012-9468-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 08/20/2012] [Indexed: 06/01/2023]
Abstract
Muscle atrophy is a process of muscle wasting induced under a series of catabolic stress conditions, such as denervation, disuse, cancer cachexia, heart and renal failure, AIDS, and aging. Neuromuscular junctions (NMJs), the synapses between motor neurons and muscle fibers undergo major changes in atrophying muscles, ranging from mild morphological alterations to complete disintegration. In this study, we hypothesized that remodeling of NMJs and muscle atrophy could be linked together. To test this, we examined if a major atrophy-promoting E3 ubiquitin ligase, MuRF1, is involved in the maintenance of NMJs. Immunofluorescence revealed that MuRF1 is highly enriched close to the NMJ. Affinity precipitation and in vivo imaging showed that MuRF1 interacts in endocytic structures with both, acetylcholine receptor, the primary postsynaptic protein of the NMJ, as well as with Bif-1, an autophagy- and endocytosis-regulating factor. In vivo imaging, radio labeling, and weighing approaches demonstrated that metabolic destabilization of acetylcholine receptors and muscle atrophy induced by denervation were significantly rescued in MuRF1-KO animals. Notably, interaction with Bif-1, and the rescue of AChR lifetime and muscle atrophy were specific to MuRF1 but not MuRF2. Our data demonstrate an involvement of MuRF1 in membrane protein-turnover, including the degradation of AChRs at the NMJ under atrophying conditions where MuRF1 also interacts and associates with Bif-1.
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Affiliation(s)
- Rüdiger Rudolf
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Molecular and Cell Biology, University of Applied Sciences Mannheim, Windeckstrasse 110, 68163 Mannheim, Germany
- Institute of Medical Technology, University of Heidelberg and University of Applied Sciences Mannheim, Paul-Wittsack-Strasse 10, 68163 Mannheim, Germany
| | - Julius Bogomolovas
- Department for Integrative Pathophysiology, Universitätsmedizin Mannheim, Theodor-Kutzer-Ufer, 68167 Mannheim, Germany
| | - Siegfried Strack
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Kyeong-Rok Choi
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Muzamil Majid Khan
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Anika Wagner
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Kathrin Brohm
- Department for Integrative Pathophysiology, Universitätsmedizin Mannheim, Theodor-Kutzer-Ufer, 68167 Mannheim, Germany
| | - Akira Hanashima
- Department for Integrative Pathophysiology, Universitätsmedizin Mannheim, Theodor-Kutzer-Ufer, 68167 Mannheim, Germany
| | - Alexander Gasch
- Department for Integrative Pathophysiology, Universitätsmedizin Mannheim, Theodor-Kutzer-Ufer, 68167 Mannheim, Germany
| | - Dittmar Labeit
- Department for Integrative Pathophysiology, Universitätsmedizin Mannheim, Theodor-Kutzer-Ufer, 68167 Mannheim, Germany
| | - Siegfried Labeit
- Department for Integrative Pathophysiology, Universitätsmedizin Mannheim, Theodor-Kutzer-Ufer, 68167 Mannheim, Germany
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Bao Y, Kake T, Hanashima A, Nomiya Y, Kubokawa K, Kimura S. Actin capping proteins, CapZ (β-actinin) and tropomodulin in amphioxus striated muscle. Gene 2012; 510:78-86. [DOI: 10.1016/j.gene.2012.07.081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 07/24/2012] [Accepted: 07/31/2012] [Indexed: 01/08/2023]
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Ohtsuka S, Hanashima A, Kubokawa K, Bao Y, Tando Y, Kohmaru J, Nakaya H, Maruyama K, Kimura S. Amphioxus connectin exhibits merged structure as invertebrate connectin in I-band region and vertebrate connectin in A-band region. J Mol Biol 2011; 409:415-26. [PMID: 21510959 DOI: 10.1016/j.jmb.2011.04.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 03/10/2011] [Accepted: 04/05/2011] [Indexed: 11/16/2022]
Abstract
Connectin is an elastic protein found in vertebrate striated muscle and in some invertebrates as connectin-like proteins. In this study, we determined the structure of the amphioxus connectin gene and analyzed its sequence based on its genomic information. Amphioxus is not a vertebrate but, phylogenetically, the lowest chordate. Analysis of gene structure revealed that the amphioxus gene is approximately 430 kb in length and consists of regions with exons of repeatedly aligned immunoglobulin (Ig) domains and regions with exons of fibronectin type 3 and Ig domain repeats. With regard to this sequence, although the region corresponding to the I-band is homologous to that of invertebrate connectin-like proteins and has an Ig-PEVK region similar to that of the Neanthes sp. 4000K protein, the region corresponding to the A-band has a super-repeat structure of Ig and fibronectin type 3 domains and a kinase domain near the C-terminus, which is similar to the structure of vertebrate connectin. These findings revealed that amphioxus connectin has the domain structure of invertebrate connectin-like proteins at its N-terminus and that of vertebrate connectin at its C-terminus. Thus, amphioxus connectin has a novel structure among known connectin-like proteins. This finding suggests that the formation and maintenance of the sarcomeric structure of amphioxus striated muscle are similar to those of vertebrates; however, its elasticity is different from that of vertebrates, being more similar to that of invertebrates.
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Affiliation(s)
- Satoshi Ohtsuka
- Department of Biology, Graduate School of Science, Chiba University, Japan
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Abstract
Identification of a large molecule in muscle is important but difficult to approach by protein chemistry. In this study we isolated nebulin cDNA from the striated muscle of amphioxus, and characterized the C-terminal regions of nebulins from other chordates. Although the sequence homology with that of human is only 26%, the C-terminal region of amphioxus nebulin has similar structural motifs of 35 amino acid nebulin repeats and an SH3 domain. Using in situ indirect immunofluorescence analysis with a specific antibody raised to the bacterially produced recombinant peptide, we identified that this nebulin fragment is located in the Z-line of the sarcomere, similar to human nebulin. Pull-down and co-sedimentation assays in vitro showed that the C-terminal region binds to actin, alpha-actinin and connectin (titin). These results suggest that the C-terminal region of amphioxus nebulin plays a similar role in maintaining striated muscle structure to that of human nebulin. This is the first report of the exact location of nebulin in amphioxus muscle.
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Affiliation(s)
- Akira Hanashima
- Department of Biology, Graduate School of Science, Chiba University, Chiba 263-8522, Japan
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