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Mead AF, Wood NB, Nelson SR, Palmer BM, Yang L, Previs SB, Ploysangngam A, Kennedy GG, McAdow JF, Tremble SM, Cipolla MJ, Ebert AM, Johnson AN, Gurnett CA, Previs MJ, Warshaw DM. Functional role of myosin-binding protein H in thick filaments of developing vertebrate fast-twitch skeletal muscle. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.10.593199. [PMID: 38798399 PMCID: PMC11118323 DOI: 10.1101/2024.05.10.593199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Myosin-binding protein H (MyBP-H) is a component of the vertebrate skeletal muscle sarcomere with sequence and domain homology to myosin-binding protein C (MyBP-C). Whereas skeletal muscle isoforms of MyBP-C (fMyBP-C, sMyBP-C) modulate muscle contractility via interactions with actin thin filaments and myosin motors within the muscle sarcomere "C-zone," MyBP-H has no known function. This is in part due to MyBP-H having limited expression in adult fast-twitch muscle and no known involvement in muscle disease. Quantitative proteomics reported here reveal MyBP-H is highly expressed in prenatal rat fast-twitch muscles and larval zebrafish, suggesting a conserved role in muscle development, and promoting studies to define its function. We take advantage of the genetic control of the zebrafish model and a combination of structural, functional, and biophysical techniques to interrogate the role of MyBP-H. Transgenic, FLAG-tagged MyBP-H or fMyBP-C both localize to the C-zones in larval myofibers, whereas genetic depletion of endogenous MyBP-H or fMyBP-C leads to increased accumulation of the other, suggesting competition for C-zone binding sites. Does MyBP-H modulate contractility from the C-zone? Globular domains critical to MyBP-C's modulatory functions are absent from MyBP-H, suggesting MyBP-H may be functionally silent. However, our results suggest an active role. Small angle x-ray diffraction of intact larval tails revealed MyBP-H contributes to the compression of the myofilament lattice accompanying stretch or contraction, while in vitro motility experiments indicate MyBP-H shares MyBP-C's capacity as a molecular "brake". These results provide new insights and raise questions about the role of the C-zone during muscle development.
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Affiliation(s)
- Andrew F. Mead
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
- Cardiovascular Research Institute, University of Vermont, Burlington, VT 05405
| | - Neil B. Wood
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
| | - Shane R. Nelson
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
- Cardiovascular Research Institute, University of Vermont, Burlington, VT 05405
| | - Bradley M. Palmer
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
- Cardiovascular Research Institute, University of Vermont, Burlington, VT 05405
| | - Lin Yang
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973
| | - Samantha Beck Previs
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
- Cardiovascular Research Institute, University of Vermont, Burlington, VT 05405
| | - Angela Ploysangngam
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
| | - Guy G. Kennedy
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
| | - Jennifer F. McAdow
- Department of Neurlogical Sciences, Larner College of Medicine, University of Vermont, Burlington, VT 05405
| | - Sarah M. Tremble
- Department of Electrical and Biomedical Engineering, College of Engineering and Mathematical Sciences, University of Vermont, Burlington, VT 05405
| | - Marilyn J. Cipolla
- Department of Electrical and Biomedical Engineering, College of Engineering and Mathematical Sciences, University of Vermont, Burlington, VT 05405
- Department of Neurology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Alicia M. Ebert
- Department of Biology, College of Arts and Sciences, University of Vermont, Burlington, VT 05405
| | - Aaron N. Johnson
- Department of Developmental Biology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Christina A. Gurnett
- Department of Developmental Biology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Michael J. Previs
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
- Cardiovascular Research Institute, University of Vermont, Burlington, VT 05405
| | - David M. Warshaw
- Department of Molecular Physiology and Biophysics, Larner College of Medicine, University of Vermont, Burlington, VT 05405
- Cardiovascular Research Institute, University of Vermont, Burlington, VT 05405
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Chong JX, Talbot JC, Teets EM, Previs S, Martin BL, Shively KM, Marvin CT, Aylsworth AS, Saadeh-Haddad R, Schatz UA, Inzana F, Ben-Omran T, Almusafri F, Al-Mulla M, Buckingham KJ, Harel T, Mor-Shaked H, Radhakrishnan P, Girisha KM, Nayak SS, Shukla A, Dieterich K, Faure J, Rendu J, Capri Y, Latypova X, Nickerson DA, Warshaw DM, Janssen PM, Amacher SL, Bamshad MJ, Bamshad MJ. Mutations in MYLPF Cause a Novel Segmental Amyoplasia that Manifests as Distal Arthrogryposis. Am J Hum Genet 2020; 107:293-310. [PMID: 32707087 DOI: 10.1016/j.ajhg.2020.06.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 06/18/2020] [Indexed: 02/06/2023] Open
Abstract
We identified ten persons in six consanguineous families with distal arthrogryposis (DA) who had congenital contractures, scoliosis, and short stature. Exome sequencing revealed that each affected person was homozygous for one of two different rare variants (c.470G>T [p.Cys157Phe] or c.469T>C [p.Cys157Arg]) affecting the same residue of myosin light chain, phosphorylatable, fast skeletal muscle (MYLPF). In a seventh family, a c.487G>A (p.Gly163Ser) variant in MYLPF arose de novo in a father, who transmitted it to his son. In an eighth family comprised of seven individuals with dominantly inherited DA, a c.98C>T (p.Ala33Val) variant segregated in all four persons tested. Variants in MYLPF underlie both dominant and recessively inherited DA. Mylpf protein models suggest that the residues associated with dominant DA interact with myosin whereas the residues altered in families with recessive DA only indirectly impair this interaction. Pathological and histological exam of a foot amputated from an affected child revealed complete absence of skeletal muscle (i.e., segmental amyoplasia). To investigate the mechanism for this finding, we generated an animal model for partial MYLPF impairment by knocking out zebrafish mylpfa. The mylpfa mutant had reduced trunk contractile force and complete pectoral fin paralysis, demonstrating that mylpf impairment most severely affects limb movement. mylpfa mutant muscle weakness was most pronounced in an appendicular muscle and was explained by reduced myosin activity and fiber degeneration. Collectively, our findings demonstrate that partial loss of MYLPF function can lead to congenital contractures, likely as a result of degeneration of skeletal muscle in the distal limb.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Michael J Bamshad
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA; Brotman-Baty Institute, Seattle, WA 98195, USA; Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA; Seattle Children's Hospital, Seattle, WA 98105, USA.
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Hromowyk KJ, Talbot JC, Martin BL, Janssen PML, Amacher SL. Cell fusion is differentially regulated in zebrafish post-embryonic slow and fast muscle. Dev Biol 2020; 462:85-100. [PMID: 32165147 PMCID: PMC7225055 DOI: 10.1016/j.ydbio.2020.03.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 02/08/2020] [Accepted: 03/03/2020] [Indexed: 12/13/2022]
Abstract
Skeletal muscle fusion occurs during development, growth, and regeneration. To investigate how muscle fusion compares among different muscle cell types and developmental stages, we studied muscle cell fusion over time in wild-type, myomaker (mymk), and jam2a mutant zebrafish. Using live imaging, we show that embryonic myoblast elongation and fusion correlate tightly with slow muscle cell migration. In wild-type embryos, only fast muscle fibers are multinucleate, consistent with previous work showing that the cell fusion regulator gene mymk is specifically expressed throughout the embryonic fast muscle domain. However, by 3 weeks post-fertilization, slow muscle fibers also become multinucleate. At this late-larval stage, mymk is not expressed in muscle fibers, but is expressed in small cells near muscle fibers. Although previous work showed that both mymk and jam2a are required for embryonic fast muscle cell fusion, we observe that muscle force and function is almost normal in mymk and jam2a mutant embryos, despite the lack of fast muscle multinucleation. We show that genetic requirements change post-embryonically, with jam2a becoming much less important by late-larval stages and mymk now required for muscle fusion and growth in both fast and slow muscle cell types. Correspondingly, adult mymk mutants perform poorly in sprint and endurance tests compared to wild-type and jam2a mutants. We show that adult mymk mutant muscle contains small mononucleate myofibers with average myonuclear domain size equivalent to that in wild type adults. The mymk mutant fibers have decreased Laminin expression and increased numbers of Pax7-positive cells, suggesting that impaired fiber growth and active regeneration contribute to the muscle phenotype. Our findings identify several aspects of muscle fusion that change with time in slow and fast fibers as zebrafish develop beyond embryonic stages.
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Affiliation(s)
- Kimberly J Hromowyk
- Department of Molecular Genetics and Biological Chemistry and Pharmacology, The Ohio State University, Columbus, OH, 43210, USA; Center for Muscle Health and Neuromuscular Disorders, The Ohio State University and Nationwide Children's Hospital, Columbus, OH, 43210, USA; Molecular, Cellular, and Developmental Biology Graduate Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Jared C Talbot
- Department of Molecular Genetics and Biological Chemistry and Pharmacology, The Ohio State University, Columbus, OH, 43210, USA; Center for Muscle Health and Neuromuscular Disorders, The Ohio State University and Nationwide Children's Hospital, Columbus, OH, 43210, USA.
| | - Brit L Martin
- Center for Muscle Health and Neuromuscular Disorders, The Ohio State University and Nationwide Children's Hospital, Columbus, OH, 43210, USA; Molecular, Cellular, and Developmental Biology Graduate Program, The Ohio State University, Columbus, OH, 43210, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, 43210, USA
| | - Paul M L Janssen
- Center for Muscle Health and Neuromuscular Disorders, The Ohio State University and Nationwide Children's Hospital, Columbus, OH, 43210, USA; Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, 43210, USA; Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, 43210, USA
| | - Sharon L Amacher
- Department of Molecular Genetics and Biological Chemistry and Pharmacology, The Ohio State University, Columbus, OH, 43210, USA; Center for Muscle Health and Neuromuscular Disorders, The Ohio State University and Nationwide Children's Hospital, Columbus, OH, 43210, USA; Center for RNA Biology, The Ohio State University, Columbus, OH, 43210, USA.
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Patton C, Farr GH, An D, Martini PG, Maves L. Lipid Nanoparticle Packaging Is an Effective and Nontoxic mRNA Delivery Platform in Embryonic Zebrafish. Zebrafish 2018; 15:217-227. [DOI: 10.1089/zeb.2017.1511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Clay Patton
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, Washington
| | - Gist H. Farr
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, Washington
| | - Ding An
- Moderna Therapeutics, Cambridge, Massachusetts
| | | | - Lisa Maves
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, Washington
- Department of Pediatrics, University of Washington, Seattle, Washington
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Fong AP, Yao Z, Zhong JW, Johnson NM, Farr GH, Maves L, Tapscott SJ. Conversion of MyoD to a neurogenic factor: binding site specificity determines lineage. Cell Rep 2015; 10:1937-46. [PMID: 25801030 DOI: 10.1016/j.celrep.2015.02.055] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 01/16/2015] [Accepted: 02/23/2015] [Indexed: 10/23/2022] Open
Abstract
MyoD and NeuroD2, master regulators of myogenesis and neurogenesis, bind to a "shared" E-box sequence (CAGCTG) and a "private" sequence (CAGGTG or CAGATG, respectively). To determine whether private-site recognition is sufficient to confer lineage specification, we generated a MyoD mutant with the DNA-binding specificity of NeuroD2. This chimeric mutant gained binding to NeuroD2 private sites but maintained binding to a subset of MyoD-specific sites, activating part of both the muscle and neuronal programs. Sequence analysis revealed an enrichment for PBX/MEIS motifs at the subset of MyoD-specific sites bound by the chimera, and point mutations that prevent MyoD interaction with PBX/MEIS converted the chimera to a pure neurogenic factor. Therefore, redirecting MyoD binding from MyoD private sites to NeuroD2 private sites, despite preserved binding to the MyoD/NeuroD2 shared sites, is sufficient to change MyoD from a master regulator of myogenesis to a master regulator of neurogenesis.
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Affiliation(s)
- Abraham P Fong
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA; Department of Pediatrics, Division of Hematology-Oncology, University of Washington School of Medicine, Seattle, WA 98105, USA.
| | - Zizhen Yao
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Jun Wen Zhong
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Nathan M Johnson
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Gist H Farr
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Lisa Maves
- Department of Pediatrics, Division of Cardiology, University of Washington, Seattle, WA 98105, USA; Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Stephen J Tapscott
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA; Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA; Department of Neurology, University of Washington School of Medicine, Seattle, WA 98105, USA.
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Pickart MA, Klee EW. Zebrafish approaches enhance the translational research tackle box. Transl Res 2014; 163:65-78. [PMID: 24269745 DOI: 10.1016/j.trsl.2013.10.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 10/24/2013] [Accepted: 10/28/2013] [Indexed: 01/08/2023]
Abstract
During the past few decades, zebrafish (Danio rerio) have been a workhorse for developmental biology and genetics. Concurrently, zebrafish have proved highly accessible and effective for translational research by providing a vertebrate animal model useful for gene discovery, disease modeling, chemical genetic screening, and other medically relevant studies. Key resources such as an annotated and complete genome sequence, and diverse tools for genetic manipulation continue to spur broad use of zebrafish. Thus, the purpose of this introductory review is to provide a window into the unique characteristics and diverse uses of zebrafish and to highlight in particular the increasing relevance of zebrafish as a translational animal model. This is accomplished by reviewing broad considerations of anatomic and physiological conservation, approaches for disease modeling and creation, general laboratory methods, genetic tools, genome conservation, and diverse opportunities for functional validation. Additional commentary throughout the review also guides the reader to the 4 new reviews found elsewhere in this special issue that showcase the many unique ways the zebrafish is improving understanding of renal regeneration, mitochondrial disease, dyslipidemia, and aging, for example. With many other possible approaches and a rapidly increasing number of medically relevant reports, zebrafish approaches enhance significantly the tools available for translational research and are actively improving the understanding of human disease.
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Affiliation(s)
| | - Eric W Klee
- Mayo Clinic, College of Medicine, Rochester, Minn
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Johnson NM, Farr GH, Maves L. The HDAC Inhibitor TSA Ameliorates a Zebrafish Model of Duchenne Muscular Dystrophy. PLOS CURRENTS 2013; 5. [PMID: 24459606 PMCID: PMC3870918 DOI: 10.1371/currents.md.8273cf41db10e2d15dd3ab827cb4b027] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Zebrafish are an excellent model for Duchenne muscular dystrophy. In particular, zebrafish provide a system for rapid, easy, and low-cost screening of small molecules that can ameliorate muscle damage in dystrophic larvae. Here we identify an optimal anti-sense morpholino cocktail that robustly knocks down zebrafish Dystrophin (<i>dmd</i>-MO). We use two approaches, muscle birefringence and muscle actin expression, to quantify muscle damage and show that the <i>dmd</i>-MO dystrophic phenotype closely resembles the zebrafish <i>dmd</i> mutant phenotype. We then show that the histone deacetylase (HDAC) inhibitor TSA, which has been shown to ameliorate the <i>mdx</i> mouse Duchenne model, can rescue muscle fiber damage in both <i>dmd</i>-MO and <i>dmd</i> mutant larvae. Our study identifies optimal morpholino and phenotypic scoring approaches for dystrophic zebrafish, further enhancing the zebrafish <i>dmd</i> model for rapid and cost-effective small molecule screening.
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Affiliation(s)
- Nathan M Johnson
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Gist H Farr
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Lisa Maves
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, Washington, USA; Department of Pediatrics, University of Washington, Seattle, Washington, USA
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Devakanmalai GS, Zumrut HE, Ozbudak EM. Cited3 activates Mef2c to control muscle cell differentiation and survival. Biol Open 2013; 2:505-14. [PMID: 23789100 PMCID: PMC3654270 DOI: 10.1242/bio.20132550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 03/25/2013] [Indexed: 01/13/2023] Open
Abstract
Vertebrate muscle development occurs through sequential differentiation of cells residing in somitic mesoderm – a process that is largely governed by transcriptional regulators. Our recent spatiotemporal microarray study in zebrafish has identified functionally uncharacterized transcriptional regulators that are expressed at the initial stages of myogenesis. cited3 is one such novel gene encoding a transcriptional coactivator, which is expressed in the precursors of oxidative slow-twitch myofibers. Our experiments placed cited3 into a gene regulatory network, where it acts downstream of Hedgehog signaling and myoD/myf5 but upstream of mef2c. Knockdown of expression of cited3 by antisense morpholino oligonucleotides impaired muscle cell differentiation and growth, caused muscle cell death and eventually led to total immotility. Transplantation experiments demonstrated that Cited3 cell-autonomously activates the expression of mef2c in slow myofibers, while it non-cell-autonomously regulates expression of structural genes in fast myofibers. Restoring expression of cited3 or mef2c rescued all the cited3 loss-of-function phenotypes. Protein truncation experiments revealed the functional necessity of C-terminally conserved domain of Cited3, which is known to mediate interactions of Cited-family proteins with histone acetylases. Our findings demonstrate that Cited3 is a critical transcriptional coactivator functioning during muscle differentiation and its absence leads to defects in terminal differentiation and survival of muscle cells.
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