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Singh J, Zlatar L, Muñoz-Becerra M, Lochnit G, Herrmann I, Pfister F, Janko C, Knopf J, Leppkes M, Schoen J, Muñoz LE, Schett G, Herrmann M, Schauer C, Mahajan A. Calpain-1 weakens the nuclear envelope and promotes the release of neutrophil extracellular traps. Cell Commun Signal 2024; 22:435. [PMID: 39252008 PMCID: PMC11384698 DOI: 10.1186/s12964-024-01785-6] [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] [Received: 02/09/2024] [Accepted: 08/09/2024] [Indexed: 09/11/2024] Open
Abstract
The inducers of neutrophil extracellular trap (NET) formation are heterogeneous and consequently, there is no specific pathway or signature molecule indispensable for NET formation. But certain events such as histone modification, chromatin decondensation, nuclear envelope breakdown, and NET release are ubiquitous. During NET formation, neutrophils drastically rearrange their cytoplasmic, granular and nuclear content. Yet, the exact mechanism for decoding each step during NET formation still remains elusive. Here, we investigated the mechanism of nuclear envelope breakdown during NET formation. Immunofluorescence microscopic evaluation revealed a gradual disintegration of outer nuclear membrane protein nesprin-1 and alterations in nuclear morphology during NET formation. MALDI-TOF analysis of NETs that had been generated by various inducers detected the accumulation of nesprin-1 fragments. This suggests that nesprin-1 degradation occurs before NET release. In the presence of a calpain-1, inhibitor nesprin-1 degradation was decreased in calcium driven NET formation. Microscopic evaluation confirmed that the disintegration of the lamin B receptor (LBR) and the collapse of the actin cytoskeleton occurs in early and later phases of NET release, respectively. We conclude that the calpain-1 degrades nesprin-1, orchestrates the weakening of the nuclear membrane, contributes to LBR disintegration, and promoting DNA release and finally, NETs formation.
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Affiliation(s)
- Jeeshan Singh
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Leticija Zlatar
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Marco Muñoz-Becerra
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Günter Lochnit
- Protein Analytics, Institute of Biochemistry, Faculty of Medicine, Justus-Liebig-University Giessen, Giessen, Germany
| | - Irmgard Herrmann
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Felix Pfister
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Uniklinikum Erlangen, Erlangen, Germany
| | - Christina Janko
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Uniklinikum Erlangen, Erlangen, Germany
| | - Jasmin Knopf
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Department of Pediatric Surgery, University Medical Center Mannheim, University of Heidelberg, Mannheim, Germany
| | - Moritz Leppkes
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Department of Medicine 1 - Gastroenterology, Pneumology and Endocrinology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Janina Schoen
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Luis E Muñoz
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Georg Schett
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Martin Herrmann
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Christine Schauer
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany
| | - Aparna Mahajan
- Department of Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany.
- Deutsches Zentrum Für Immuntherapie (DZI), Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany.
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2
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Li J, Sun L, Sun J, Jiang H. Genome-wide association research on the reproductive traits of Qianhua Mutton Merino sheep. Anim Biosci 2024; 37:1535-1547. [PMID: 38575125 PMCID: PMC11366534 DOI: 10.5713/ab.23.0365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 02/01/2024] [Indexed: 04/06/2024] Open
Abstract
OBJECTIVE Qianhua Mutton Merino sheep is a new breed of meat wool sheep cultivated independently in China. In 2018, it was approved by the state and brought into the national list of livestock and poultry genetic resources. Qianhua Mutton Merino sheep have the common characteristics of typical meat livestock varieties with rapid growth and development in the early stage and high meat production performance. The objective of this research is to investigate the Genome-wide association of the reproductive traits of Qianhua Mutton Merino sheep. METHODS Qianhua Mutton Merino sheep from the breeding core group were selected as the research object, genome-wide association analysis was conducted on genes associated with the reproductive traits (singleton or twins, birth weight, age [in days] for sexual maturity, weaning weight, and daily gain from birth to weaning) of Qianhua mutton merino. RESULTS Our study findings showed that 151 loci of single-nucleotide polymorphisms (SNPs) were detected, among which 3 SNPs related to birth weight and weaning weight occupied a significant portion of the wide genome. The candidate genes preliminarily obtained were SYNE1, SLC12A4, BMP2K, CAMK2D, IMMP2L, DMD, and BCL2. CONCLUSION We found 151 SNP loci for five traits related to reproduction (including singleton or twins, birth weight, age [in days] at sexual maturity, weaning weight, and daily weight gain from birth to weaning). The functions of these candidate genes were mainly enriched in nucleotide metabolism, metal ion binding, oxytocin signaling pathway, and neurotrophin signaling pathway.
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Affiliation(s)
- Jiarong Li
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130000, China
| | - Limin Sun
- Institute of Animal Husbandry and Veterinary, Jilin Academy of Agricultural Sciences (Northeast Agricultural Research Center of China), Changchun, 130000, China
| | - Jiazhi Sun
- Anhua Agricultural Insurance Co., Ltd. Changchun Central Branch, Changchun, 130000, China
| | - Huaizhi Jiang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130000, China
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3
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Morton GM, Toledo MP, Zheng Y, Zheng C, Megraw TL. A distinct isoform of Msp300/Nesprin organizes the perinuclear microtubule organizing center in adipose cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.28.601268. [PMID: 38979285 PMCID: PMC11230431 DOI: 10.1101/2024.06.28.601268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
In many cell types, disparate non-centrosomal microtubule-organizing centers (ncMTOCs) replace functional centrosomes and serve the unique needs of the cell types in which they are formed. In Drosophila fat body cells (adipocytes), an ncMTOC is organized on the nuclear surface. This perinuclear ncMTOC is anchored by Msp300, encoded by one of two Nesprin-encoding genes in Drosophila. Msp300 and the spectraplakin short stop (shot) are co-dependent for localization to the nuclear envelope to generate the ncMTOC where they recruit the microtubule minus-end stabilizer Patronin (CAMSAP). The fat body perinuclear ncMTOC requires Patronin, Ninein, and Msps (ortholog of ch-TOG), but does not require γ-tubulin for MT assembly. The Msp300 gene is complex, encoding at least eleven isoforms. Here we show that two Msp300 isoforms, Msp300-PE and -PG, are required and only one, Msp300-PE, appears sufficient for generation of the ncMTOC. Loss of Msp300-PE,-PG retains the presence of the other isoforms at the nuclear surface, indicating that they are not sufficient to generate the ncMTOC. Loss of Msp300-PE,-PG results in severe loss of localization of shot and Patronin, and disruption of the MT array. This results in nuclear mispositioning and loss of endosomal trafficking. Msp300-PE has an unusual domain structure including a lack of a KASH domain and very few spectrin repeats and appears therefore to have a highly derived function suited to generating an ncMTOC on the nuclear surface.
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Affiliation(s)
- Garret M Morton
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
| | - Maria Pilar Toledo
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
| | - Yiming Zheng
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiang'an Hospital of Xiamen University, Xiamen University, Xiamen, China, 361102, and Shenzhen Research Institute of Xiamen University, Shenzhen, China, 518057
| | - Chunfeng Zheng
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
| | - Timothy L Megraw
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
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4
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Copeland I, Wonkam-Tingang E, Gupta-Malhotra M, Hashmi SS, Han Y, Jajoo A, Hall NJ, Hernandez PP, Lie N, Liu D, Xu J, Rosenfeld J, Haldipur A, Desire Z, Coban-Akdemir ZH, Scott DA, Li Q, Chao HT, Zaske AM, Lupski JR, Milewicz DM, Shete S, Posey JE, Hanchard NA. Exome sequencing implicates ancestry-related Mendelian variation at SYNE1 in childhood-onset essential hypertension. JCI Insight 2024; 9:e172152. [PMID: 38716726 PMCID: PMC11141928 DOI: 10.1172/jci.insight.172152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 03/19/2024] [Indexed: 05/12/2024] Open
Abstract
Childhood-onset essential hypertension (COEH) is an uncommon form of hypertension that manifests in childhood or adolescence and, in the United States, disproportionately affects children of African ancestry. The etiology of COEH is unknown, but its childhood onset, low prevalence, high heritability, and skewed ancestral demography suggest the potential to identify rare genetic variation segregating in a Mendelian manner among affected individuals and thereby implicate genes important to disease pathogenesis. However, no COEH genes have been reported to date. Here, we identify recessive segregation of rare and putatively damaging missense variation in the spectrin domain of spectrin repeat containing nuclear envelope protein 1 (SYNE1), a cardiovascular candidate gene, in 3 of 16 families with early-onset COEH without an antecedent family history. By leveraging exome sequence data from an additional 48 COEH families, 1,700 in-house trios, and publicly available data sets, we demonstrate that compound heterozygous SYNE1 variation in these COEH individuals occurred more often than expected by chance and that this class of biallelic rare variation was significantly enriched among individuals of African genetic ancestry. Using in vitro shRNA knockdown of SYNE1, we show that reduced SYNE1 expression resulted in a substantial decrease in the elasticity of smooth muscle vascular cells that could be rescued by pharmacological inhibition of the downstream RhoA/Rho-associated protein kinase pathway. These results provide insights into the molecular genetics and underlying pathophysiology of COEH and suggest a role for precision therapeutics in the future.
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Affiliation(s)
- Ian Copeland
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Edmond Wonkam-Tingang
- Childhood Complex Disease Genomics Section, National Human Genome Research Institute, NIH, Bethesda, USA
| | | | - S. Shahrukh Hashmi
- Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Yixing Han
- Childhood Complex Disease Genomics Section, National Human Genome Research Institute, NIH, Bethesda, USA
| | - Aarti Jajoo
- Childhood Complex Disease Genomics Section, National Human Genome Research Institute, NIH, Bethesda, USA
| | - Nancy J. Hall
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- US Department of Agriculture Agricultural Research Service Children’s Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA
| | - Paula P. Hernandez
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- US Department of Agriculture Agricultural Research Service Children’s Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA
| | - Natasha Lie
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Childhood Complex Disease Genomics Section, National Human Genome Research Institute, NIH, Bethesda, USA
- US Department of Agriculture Agricultural Research Service Children’s Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA
| | - Dan Liu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Jun Xu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Jill Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Baylor Genetics, Houston, Texas, USA
| | - Aparna Haldipur
- Childhood Complex Disease Genomics Section, National Human Genome Research Institute, NIH, Bethesda, USA
| | - Zelene Desire
- Childhood Complex Disease Genomics Section, National Human Genome Research Institute, NIH, Bethesda, USA
| | - Zeynep H. Coban-Akdemir
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Human Genetics Center, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Daryl A. Scott
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Texas Children’s Hospital, Houston, Texas, USA
- Department of Molecular Physiology and Biophysics
| | - Qing Li
- Childhood Complex Disease Genomics Section, National Human Genome Research Institute, NIH, Bethesda, USA
| | - Hsiao-Tuan Chao
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Division of Neurology and Developmental Neuroscience, Department of Pediatrics; and
- Department of Neuroscience, Baylor College of Medicine, Houston, Texas, USA
- Cain Pediatric Neurology Research Foundation Laboratories, Jan and Dan Duncan Neurological Research Institute, Texas Children’s Hospital and Baylor College of Medicine, Houston, Texas, USA
- McNair Medical Institute, The Robert and Janice McNair Foundation, Houston, Texas, USA
| | - Ana M. Zaske
- Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - James R. Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Texas Children’s Hospital, Houston, Texas, USA
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, USA
| | - Dianna M. Milewicz
- Department of Internal Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Sanjay Shete
- The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jennifer E. Posey
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- McNair Medical Institute, The Robert and Janice McNair Foundation, Houston, Texas, USA
| | - Neil A. Hanchard
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Childhood Complex Disease Genomics Section, National Human Genome Research Institute, NIH, Bethesda, USA
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5
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Benarroch E. What Is the Role of Nuclear Envelope Proteins in Neurologic Disorders? Neurology 2024; 102:e209202. [PMID: 38330281 DOI: 10.1212/wnl.0000000000209202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 02/10/2024] Open
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6
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Shah PP, Santini GT, Shen KM, Jain R. InterLINCing Chromatin Organization and Mechanobiology in Laminopathies. Curr Cardiol Rep 2023; 25:307-314. [PMID: 37052760 PMCID: PMC10185580 DOI: 10.1007/s11886-023-01853-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/22/2023] [Indexed: 04/14/2023]
Abstract
PURPOSE OF REVIEW In this review, we explore the chromatin-related consequences of laminopathy-linked mutations through the lens of mechanotransduction. RECENT FINDINGS Multiple studies have highlighted the role of the nuclear lamina in maintaining the integrity of the nucleus. The lamina also has a critical role in 3D genome organization. Mutations in lamina proteins associated with various laminopathies result in the loss of organization of DNA at the nuclear periphery. However, it remains unclear if or how these two aspects of lamin function are connected. Recent data suggests that unlinking the cytoskeleton from the nuclear lamina may be beneficial to slow progress of deleterious phenotypes observed in laminopathies. In this review, we highlight emerging data that suggest interlinked chromatin- and mechanical biology-related pathways are interconnected in the pathogenesis of laminopathies.
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Affiliation(s)
- Parisha P. Shah
- Departments of Medicine and Cell and Developmental Biology, Penn Cardiovascular Institute, Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
- Smilow Center for Translational Research, 09-184, 3400 Civic Center Blvd., Philadelphia, PA 19104 USA
| | - Garrett T. Santini
- Departments of Medicine and Cell and Developmental Biology, Penn Cardiovascular Institute, Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Kaitlyn M. Shen
- Departments of Medicine and Cell and Developmental Biology, Penn Cardiovascular Institute, Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Rajan Jain
- Departments of Medicine and Cell and Developmental Biology, Penn Cardiovascular Institute, Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
- Smilow Center for Translational Research, 09-101, 3400 Civic Center Blvd., Philadelphia, PA 19104 USA
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7
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Yoshida Y, Uchida K, Kodo K, Ishizaki-Asami R, Maeda J, Katsumata Y, Yuasa S, Fukuda K, Kosaki K, Watanabe Y, Nakagawa O, Yamagishi H. A genetic and developmental biological approach for a family with complex congenital heart diseases-evidence of digenic inheritance. Front Cardiovasc Med 2023; 10:1135141. [PMID: 37180804 PMCID: PMC10166836 DOI: 10.3389/fcvm.2023.1135141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 04/10/2023] [Indexed: 05/16/2023] Open
Abstract
Objective Congenital heart disease (CHD) is caused by cardiovascular developmental defects and has a global prevalence of ∼1%. The etiology of CHD is multifactorial and remains generally unknown, despite advances in analytical techniques based on next-generation sequencing (NGS). The aim of our study was to elucidate the multi-genetic origin and pathogenesis of an intriguing familial case with complex CHD. Methods We performed an original trio-based gene panel analysis using NGS of the family, including two siblings with CHD of single ventricular phenotype, and their unaffected parents. The pathogenicity of the detected rare variants was investigated in silico, and the functional effects of the variants were confirmed in vitro using luciferase assays. The combinatorial effect of gene alterations of the putative responsible genes was tested in vivo using genetically engineered mutant mice. Results NGS-based gene panel analyses revealed two heterozygous rare variants in NODAL and in TBX20 common to the siblings and to just one of parents. Both variants were suspected pathogenic in silico, and decreased transcriptional activities of downstream signaling pathways were observed in vitro. The analyses of Nodal and Tbx20 double mutant mice demonstrated that Nodal+/-Tbx20-/- embryos showed more severe defects than Nodal+/+Tbx20-/- embryos during early heart development. The expression of Pitx2, a known downstream target of Nodal, was downregulated in Tbx20-/- mutants. Conclusions Two rare variants on NODAL and TBX20 genes detected in this family were considered to be loss-of-function mutations. Our results suggest that NODAL and TBX20 may be complementary for the cardiac development, and a combinatorial loss-of-function of NODAL and TBX20 could be implicated in digenic inherence as the etiology of complex CHD associated with single ventricle defects in this family.
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Affiliation(s)
- Yu Yoshida
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Keiko Uchida
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
- Health Center, Keio University, Kanagawa, Japan
| | - Kazuki Kodo
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | | | - Jun Maeda
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | | | - Shinsuke Yuasa
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Keiichi Fukuda
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Yusuke Watanabe
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Osamu Nakagawa
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Hiroyuki Yamagishi
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
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8
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Buglak DB, Bougaran P, Kulikauskas MR, Liu Z, Monaghan-Benson E, Gold AL, Marvin AP, Burciu A, Tanke NT, Oatley M, Ricketts SN, Kinghorn K, Johnson BN, Shiau CE, Rogers S, Guilluy C, Bautch VL. Nuclear SUN1 stabilizes endothelial cell junctions via microtubules to regulate blood vessel formation. eLife 2023; 12:83652. [PMID: 36989130 PMCID: PMC10059686 DOI: 10.7554/elife.83652] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 03/10/2023] [Indexed: 03/30/2023] Open
Abstract
Endothelial cells line all blood vessels, where they coordinate blood vessel formation and the blood-tissue barrier via regulation of cell-cell junctions. The nucleus also regulates endothelial cell behaviors, but it is unclear how the nucleus contributes to endothelial cell activities at the cell periphery. Here, we show that the nuclear-localized linker of the nucleoskeleton and cytoskeleton (LINC) complex protein SUN1 regulates vascular sprouting and endothelial cell-cell junction morphology and function. Loss of murine endothelial Sun1 impaired blood vessel formation and destabilized junctions, angiogenic sprouts formed but retracted in SUN1-depleted sprouts, and zebrafish vessels lacking Sun1b had aberrant junctions and defective cell-cell connections. At the cellular level, SUN1 stabilized endothelial cell-cell junctions, promoted junction function, and regulated contractility. Mechanistically, SUN1 depletion altered cell behaviors via the cytoskeleton without changing transcriptional profiles. Reduced peripheral microtubule density, fewer junction contacts, and increased catastrophes accompanied SUN1 loss, and microtubule depolymerization phenocopied effects on junctions. Depletion of GEF-H1, a microtubule-regulated Rho activator, or the LINC complex protein nesprin-1 rescued defective junctions of SUN1-depleted endothelial cells. Thus, endothelial SUN1 regulates peripheral cell-cell junctions from the nucleus via LINC complex-based microtubule interactions that affect peripheral microtubule dynamics and Rho-regulated contractility, and this long-range regulation is important for proper blood vessel sprouting and junction integrity.
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Affiliation(s)
- Danielle B Buglak
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Pauline Bougaran
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Molly R Kulikauskas
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Ziqing Liu
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Elizabeth Monaghan-Benson
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State UniversityRaleighUnited States
| | - Ariel L Gold
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Allison P Marvin
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Andrew Burciu
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Natalie T Tanke
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Morgan Oatley
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Shea N Ricketts
- Department of Pathology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Karina Kinghorn
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Bryan N Johnson
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Celia E Shiau
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Stephen Rogers
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
| | - Christophe Guilluy
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State UniversityRaleighUnited States
| | - Victoria L Bautch
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel HillChapel HillUnited States
- Department of Biology, The University of North Carolina at Chapel HillChapel HillUnited States
- McAllister Heart Institute, The University of North Carolina at Chapel HillChapel HillUnited States
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9
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Zhang B, Powers JD, McCulloch AD, Chi NC. Nuclear mechanosignaling in striated muscle diseases. Front Physiol 2023; 14:1126111. [PMID: 36960155 PMCID: PMC10027932 DOI: 10.3389/fphys.2023.1126111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 02/22/2023] [Indexed: 03/09/2023] Open
Abstract
Mechanosignaling describes processes by which biomechanical stimuli are transduced into cellular responses. External biophysical forces can be transmitted via structural protein networks that span from the cellular membrane to the cytoskeleton and the nucleus, where they can regulate gene expression through a series of biomechanical and/or biochemical mechanosensitive mechanisms, including chromatin remodeling, translocation of transcriptional regulators, and epigenetic factors. Striated muscle cells, including cardiac and skeletal muscle myocytes, utilize these nuclear mechanosignaling mechanisms to respond to changes in their intracellular and extracellular mechanical environment and mediate gene expression and cell remodeling. In this brief review, we highlight and discuss recent experimental work focused on the pathway of biomechanical stimulus propagation at the nucleus-cytoskeleton interface of striated muscles, and the mechanisms by which these pathways regulate gene regulation, muscle structure, and function. Furthermore, we discuss nuclear protein mutations that affect mechanosignaling function in human and animal models of cardiomyopathy. Furthermore, current open questions and future challenges in investigating striated muscle nuclear mechanosignaling are further discussed.
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Affiliation(s)
- Bo Zhang
- Department of Bioengineering, University of California San Diego, La Jolla, CA, United States
| | - Joseph D. Powers
- Department of Bioengineering, University of California San Diego, La Jolla, CA, United States
| | - Andrew D. McCulloch
- Department of Bioengineering, University of California San Diego, La Jolla, CA, United States
- Institute for Engineering in Medicine, University of California San Diego, La Jolla, CA, United States
| | - Neil C. Chi
- Department of Bioengineering, University of California San Diego, La Jolla, CA, United States
- Institute for Engineering in Medicine, University of California San Diego, La Jolla, CA, United States
- Department of Medicine, Division of Cardiovascular Medicine, University of California San Diego, La Jolla, CA, United States
- Institute of Genomic Medicine, University of California San Diego, La Jolla, CA, United States
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10
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Battey E, Ross JA, Hoang A, Wilson DGS, Han Y, Levy Y, Pollock RD, Kalakoutis M, Pugh JN, Close GL, Ellison-Hughes GM, Lazarus NR, Iskratsch T, Harridge SDR, Ochala J, Stroud MJ. Myonuclear alterations associated with exercise are independent of age in humans. J Physiol 2023. [PMID: 36597809 DOI: 10.1113/jp284128] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 12/19/2022] [Indexed: 01/05/2023] Open
Abstract
Age-related decline in skeletal muscle structure and function can be mitigated by regular exercise. However, the precise mechanisms that govern this are not fully understood. The nucleus plays an active role in translating forces into biochemical signals (mechanotransduction), with the nuclear lamina protein lamin A regulating nuclear shape, nuclear mechanics and ultimately gene expression. Defective lamin A expression causes muscle pathologies and premature ageing syndromes, but the roles of nuclear structure and function in physiological ageing and in exercise adaptations remain obscure. Here, we isolated single muscle fibres and carried out detailed morphological and functional analyses on myonuclei from young and older exercise-trained individuals. Strikingly, myonuclei from trained individuals were more spherical, less deformable, and contained a thicker nuclear lamina than those from untrained individuals. Complementary to this, exercise resulted in increased levels of lamin A and increased myonuclear stiffness in mice. We conclude that exercise is associated with myonuclear remodelling, independently of age, which may contribute to the preservative effects of exercise on muscle function throughout the lifespan. KEY POINTS: The nucleus plays an active role in translating forces into biochemical signals. Myonuclear aberrations in a group of muscular dystrophies called laminopathies suggest that the shape and mechanical properties of myonuclei are important for maintaining muscle function. Here, striking differences are presented in myonuclear shape and mechanics associated with exercise, in both young and old humans. Myonuclei from trained individuals were more spherical, less deformable and contained a thicker nuclear lamina than untrained individuals. It is concluded that exercise is associated with age-independent myonuclear remodelling, which may help to maintain muscle function throughout the lifespan.
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Affiliation(s)
- E Battey
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - J A Ross
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - A Hoang
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - D G S Wilson
- School of Engineering and Materials Science, Queen Mary University of London, London, UK
| | - Y Han
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Y Levy
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - R D Pollock
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - M Kalakoutis
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
- Randall Centre for Cell and Molecular Biophysics, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - J N Pugh
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - G L Close
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - G M Ellison-Hughes
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - N R Lazarus
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - T Iskratsch
- School of Engineering and Materials Science, Queen Mary University of London, London, UK
- Randall Centre for Cell and Molecular Biophysics, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - S D R Harridge
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - J Ochala
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - M J Stroud
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
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11
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van der Graaf K, Srivastav S, Singh P, McNew JA, Stern M. The Drosophila melanogaster attP40 docking site and derivatives are insertion mutations of msp-300. PLoS One 2022; 17:e0278598. [PMID: 36516171 PMCID: PMC9750024 DOI: 10.1371/journal.pone.0278598] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 11/19/2022] [Indexed: 12/15/2022] Open
Abstract
The ɸC31 integrase system is widely used in Drosophila melanogaster to allow transgene targeting to specific loci. Over the years, flies bearing any of more than 100 attP docking sites have been constructed. One popular docking site, termed attP40, is located close to the Nesprin-1 orthologue msp-300 and lies upstream of certain msp-300 isoforms and within the first intron of others. Here we show that attP40 causes larval muscle nuclear clustering, which is a phenotype also conferred by msp-300 mutations. We also show that flies bearing insertions within attP40 can exhibit decreased msp-300 transcript levels in third instar larvae. Finally, chromosomes carrying certain "transgenic RNAi project" (TRiP) insertions into attP40 can confer pupal or adult inviability or infertility, or dominant nuclear clustering effects in certain genetic backgrounds. These phenotypes do not require transcription from the insertions within attP40. These results demonstrate that attP40 and insertion derivatives act as msp-300 insertional mutations. These findings should be considered when interpreting data from attP40-bearing flies.
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Affiliation(s)
- Kevin van der Graaf
- Department of Biosciences, Program in Biochemistry and Cell Biology, Rice University, Houston, Texas, United States of America
| | - Saurabh Srivastav
- Department of Biosciences, Program in Biochemistry and Cell Biology, Rice University, Houston, Texas, United States of America
| | - Pratibha Singh
- Department of Biosciences, Program in Biochemistry and Cell Biology, Rice University, Houston, Texas, United States of America
| | - James A. McNew
- Department of Biosciences, Program in Biochemistry and Cell Biology, Rice University, Houston, Texas, United States of America
| | - Michael Stern
- Department of Biosciences, Program in Biochemistry and Cell Biology, Rice University, Houston, Texas, United States of America
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12
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Leong EL, Khaing NT, Cadot B, Hong WL, Kozlov S, Werner H, Wong ESM, Stewart CL, Burke B, Lee YL. Nesprin-1 LINC complexes recruit microtubule cytoskeleton proteins and drive pathology in Lmna-mutant striated muscle. Hum Mol Genet 2022; 32:177-191. [PMID: 35925868 PMCID: PMC9840208 DOI: 10.1093/hmg/ddac179] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 07/27/2022] [Accepted: 07/29/2022] [Indexed: 01/19/2023] Open
Abstract
Mutations in LMNA, the gene encoding A-type lamins, cause laminopathies-diseases of striated muscle and other tissues. The aetiology of laminopathies has been attributed to perturbation of chromatin organization or structural weakening of the nuclear envelope (NE) such that the nucleus becomes more prone to mechanical damage. The latter model requires a conduit for force transmission to the nucleus. NE-associated Linker of Nucleoskeleton and Cytoskeleton (LINC) complexes are one such pathway. Using clustered regularly interspaced short palindromic repeats to disrupt the Nesprin-1 KASH (Klarsicht, ANC-1, Syne Homology) domain, we identified this LINC complex protein as the predominant NE anchor for microtubule cytoskeleton components, including nucleation activities and motor complexes, in mouse cardiomyocytes. Loss of Nesprin-1 LINC complexes resulted in loss of microtubule cytoskeleton proteins at the nucleus and changes in nuclear morphology and positioning in striated muscle cells, but with no overt physiological defects. Disrupting the KASH domain of Nesprin-1 suppresses Lmna-linked cardiac pathology, likely by reducing microtubule cytoskeleton activities at the nucleus. Nesprin-1 LINC complexes thus represent a potential therapeutic target for striated muscle laminopathies.
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Affiliation(s)
| | | | - Bruno Cadot
- Sorbonne Université, INSERM U974, Institut de Myologie, GH Pitié Salpêtrière, 47 Boulevard de l’Hôpital, Paris 75013, France
| | - Wei Liang Hong
- Institute of Medical Biology, Agency for Science Technology and Research (ASTAR), 8A Biomedical Grove, Level 6 Immunos, Singapore 138648, Singapore,ASTAR Skin Research Labs (ASRL), Agency for Science Technology and Research (ASTAR), 8A Biomedical Grove, Level 6 Immunos, Singapore 138648, Singapore
| | - Serguei Kozlov
- Center for Advanced Preclinical Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Hendrikje Werner
- Institute of Medical Biology, Agency for Science Technology and Research (ASTAR), 8A Biomedical Grove, Level 6 Immunos, Singapore 138648, Singapore,ASTAR Skin Research Labs (ASRL), Agency for Science Technology and Research (ASTAR), 8A Biomedical Grove, Level 6 Immunos, Singapore 138648, Singapore
| | - Esther Sook Miin Wong
- Institute of Medical Biology, Agency for Science Technology and Research (ASTAR), 8A Biomedical Grove, Level 6 Immunos, Singapore 138648, Singapore,Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (ASTAR), 8A Biomedical Grove, Level 5 Immunos, Singapore 138648, Singapore
| | - Colin L Stewart
- To whom correspondence should be addressed. Colin L. Stewart, ; Brian Burke, ; Yin Loon Lee,
| | - Brian Burke
- To whom correspondence should be addressed. Colin L. Stewart, ; Brian Burke, ; Yin Loon Lee,
| | - Yin Loon Lee
- To whom correspondence should be addressed. Colin L. Stewart, ; Brian Burke, ; Yin Loon Lee,
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13
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Meqbel BRM, Gomes M, Omer A, Gallouzi IE, Horn HF. LINCing Senescence and Nuclear Envelope Changes. Cells 2022; 11:1787. [PMID: 35681483 PMCID: PMC9179861 DOI: 10.3390/cells11111787] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 01/27/2023] Open
Abstract
The nuclear envelope (NE) has emerged as a nexus for cellular organization, signaling, and survival. Beyond its role as a barrier to separate the nucleoplasm from the cytoplasm, the NE's role in supporting and maintaining a myriad of other functions has made it a target of study in many cellular processes, including senescence. The nucleus undergoes dramatic changes in senescence, many of which are driven by changes in the NE. Indeed, Lamin B1, a key NE protein that is consistently downregulated in senescence, has become a marker for senescence. Other NE proteins have also been shown to play a role in senescence, including LINC (linker of nucleoskeleton and cytoskeleton) complex proteins. LINC complexes span the NE, forming physical connections between the cytoplasm to the nucleoplasm. In this way, they integrate nuclear and cytoplasmic mechanical signals and are essential not only for a variety of cellular functions but are needed for cell survival. However, LINC complex proteins have been shown to have a myriad of functions in addition to forming a LINC complex, often existing as nucleoplasmic or cytoplasmic soluble proteins in a variety of isoforms. Some of these proteins have now been shown to play important roles in DNA repair, cell signaling, and nuclear shape regulation, all of which are important in senescence. This review will focus on some of these roles and highlight the importance of LINC complex proteins in senescence.
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Affiliation(s)
- Bakhita R. M. Meqbel
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha P.O. Box 34110, Qatar;
| | - Matilde Gomes
- KAUST Smart-Health Initiative and Biological and Environmental Science and Engineering (BESE) Division, King Abdullah University of Science and Technology (KAUST), Jeddah 21589, Saudi Arabia; (M.G.); (I.E.G.)
| | - Amr Omer
- Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Montreal, QC H3G 1Y6, Canada;
| | - Imed E. Gallouzi
- KAUST Smart-Health Initiative and Biological and Environmental Science and Engineering (BESE) Division, King Abdullah University of Science and Technology (KAUST), Jeddah 21589, Saudi Arabia; (M.G.); (I.E.G.)
- Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Montreal, QC H3G 1Y6, Canada;
| | - Henning F. Horn
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha P.O. Box 34110, Qatar;
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14
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Arias M, Mir P, Fernández-Matarrubia M, Arpa J, García-Ramos R, Blanco-Arias P, Quintans B, Sobrido MJ. Autosomal recessive spinocerebellar ataxia SCAR8/ARCA1: first families detected in Spain. NEUROLOGÍA (ENGLISH EDITION) 2022; 37:257-262. [PMID: 35595401 DOI: 10.1016/j.nrleng.2019.01.014] [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] [Received: 12/28/2018] [Accepted: 01/16/2019] [Indexed: 11/18/2022] Open
Abstract
INTRODUCTION Autosomal recessive spinocerebellar ataxia type 8 (ARCA1/SCAR8) is caused by mutations of the SYNE1 gene. The disease was initially described in families from Quebec (Canada) with a phenotype of pure cerebellar syndrome, but in recent years has been reported with a more variable clinical phenotype in other countries. Cases have recently been described of muscular dystrophy, arthrogryposis, and cardiomyopathy due to SYNE1 mutations. OBJECTIVE To describe clinical and molecular findings from 4 patients (3 men and one woman) diagnosed with ARCA1/SCAR8 from 3 Spanish families from different regions. MATERIAL AND METHODS We describe the clinical, paraclinical, and genetic results from 4 patients diagnosed with ARCA1/SCAR8 at different Spanish neurology departments. RESULTS Onset occurred in the third or fourth decade of life in all patients. After 15 years of progression, 3 patients presented pure cerebellar syndrome, similar to the Canadian patients; the fourth patient, with over 30 years' progression, presented vertical gaze palsy, pyramidal signs, and moderate cognitive impairment. In all patients, MRI studies showed cerebellar atrophy. The genetic study revealed distinct pathogenic SYNE1 mutations in each family. CONCLUSIONS ARCA1/SCAR8 can be found worldwide and may be caused by many distinct mutations in the SYNE1 gene. The disease may manifest with a complex phenotype of varying severity.
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Affiliation(s)
- M Arias
- Servicio de Neurología, Complexo Hospitalario de Santiago de Compostela, Santiago de Compostela, La Coruña, Spain.
| | - P Mir
- Servicio de Neurología, Hospital Virgen del Rocío, Sevilla, Spain
| | | | - J Arpa
- Servicio de Neurología, Hospital Clínico San Carlos, Madrid, Spain
| | - R García-Ramos
- Servicio de Neurología, Hospital Clínico San Carlos, Madrid, Spain
| | - P Blanco-Arias
- Fundación Pública Galega de Medicina Xenómica, Santiago de Compostela, La Coruña, Spain
| | - B Quintans
- Grupo de Neurogenética, Instituto de Investigación Sanitaria de Santiago (IDIS)-Complexo Hospitalario Universitario, Santiago de Compostela, La Coruña, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - M J Sobrido
- Grupo de Neurogenética, Instituto de Investigación Sanitaria de Santiago (IDIS)-Complexo Hospitalario Universitario, Santiago de Compostela, La Coruña, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
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15
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Arias M, Mir P, Fernández-Matarrubia M, Arpa J, García-Ramos R, Blanco-Arias P, Quintans B, Sobrido MJ. Autosomal recessive spinocerebellar ataxia SCAR8/ARCA1: First families detected in Spain. Neurologia 2022; 37:257-262. [PMID: 31103315 DOI: 10.1016/j.nrl.2019.01.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 01/16/2019] [Indexed: 12/28/2022] Open
Abstract
INTRODUCTION Autosomal recessive spinocerebellar ataxia type 8 (ARCA1/SCAR8) is caused by mutations of the SYNE1 gene. The disease was initially described in families from Quebec (Canada) with a phenotype of pure cerebellar syndrome, but in recent years has been reported with a more variable clinical phenotype in other countries. Cases have recently been described of muscular dystrophy, arthrogryposis, and cardiomyopathy due to SYNE1 mutations. OBJECTIVE To describe clinical and molecular findings from 4 patients (3 men and one woman) diagnosed with ARCA1/SCAR8 from 3 Spanish families from different regions. MATERIAL AND METHODS We describe the clinical, paraclinical, and genetic results from 4 patients diagnosed with ARCA1/SCAR8 at different Spanish neurology departments. RESULTS Onset occurred in the third or fourth decade of live in all patients. After 15 years of progression, 3 patients presented pure cerebellar syndrome, similar to the Canadian patients; the fourth patient, with over 30 years' progression, presented vertical gaze palsy, pyramidal signs, and moderate cognitive impairment. In all patients, MRI studies showed cerebellar atrophy. The genetic study revealed distinct pathogenic SYNE1 mutations in each family. CONCLUSIONS ARCA1/SCAR8 can be found worldwide and may be caused by many distinct mutations in the SYNE1 gene. The disease may manifest with a complex phenotype of varying severity.
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Affiliation(s)
- M Arias
- Servicio de Neurología, Complexo Hospitalario de Santiago de Compostela, Santiago de Compostela, La Coruña, España.
| | - P Mir
- Servicio de Neurología, Hospital Virgen del Rocío, Sevilla, España
| | | | - J Arpa
- Servicio de Neurología, Hospital Clínico San Carlos de, Madrid, España
| | - R García-Ramos
- Servicio de Neurología, Hospital Clínico San Carlos de, Madrid, España
| | - P Blanco-Arias
- Fundación Pública Galega de Medicina Xenómica, Santiago de Compostela, La Coruña, España
| | - B Quintans
- Grupo de Neurogenética, Instituto de Investigación Sanitaria de Santiago (IDIS)-Complexo Hospitalario Universitario, Santiago de Compostela, La Coruña, España; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, España
| | - M J Sobrido
- Grupo de Neurogenética, Instituto de Investigación Sanitaria de Santiago (IDIS)-Complexo Hospitalario Universitario, Santiago de Compostela, La Coruña, España; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, España
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16
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Buckley KH, Nestor-Kalinoski AL, Pizza FX. Positional Context of Myonuclear Transcription During Injury-Induced Muscle Regeneration. Front Physiol 2022; 13:845504. [PMID: 35492593 PMCID: PMC9040890 DOI: 10.3389/fphys.2022.845504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 03/02/2022] [Indexed: 01/31/2023] Open
Abstract
Fundamental aspects underlying downstream processes of skeletal muscle regeneration, such as myonuclear positioning and transcription are poorly understood. This investigation begins to address deficiencies in knowledge by examining the kinetics of myonuclear accretion, positioning, and global transcription during injury-induced muscle regeneration in mice. We demonstrate that myonuclear accretion plateaus within 7 days of an injury and that the majority (∼70%) of myonuclei are centrally aligned in linear arrays (nuclear chains) throughout the course of regeneration. Relatively few myonuclei were found in a peripheral position (∼20%) or clustered (∼10%) together during regeneration. Importantly, transcriptional activity of individual myonuclei in nuclear chains was high, and greater than that of peripheral or clustered myonuclei. Transcription occurring primarily in nuclear chains elevated the collective transcriptional activity of regenerating myofibers during the later stage of regeneration. Importantly, the number of myonuclei in chains and their transcriptional activity were statistically correlated with an increase in myofiber size during regeneration. Our findings demonstrate the positional context of transcription during regeneration and highlight the importance of centralized nuclear chains in facilitating hypertrophy of regenerating myofibers after injury.
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Affiliation(s)
- Kole H. Buckley
- School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, United States
| | | | - Francis X. Pizza
- School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, United States
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17
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Integrating mechanical signals into cellular identity. Trends Cell Biol 2022; 32:669-680. [PMID: 35337714 PMCID: PMC9288541 DOI: 10.1016/j.tcb.2022.02.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/19/2022] [Accepted: 02/23/2022] [Indexed: 11/24/2022]
Abstract
The large arrays of cell types in a multicellular organism are defined by their stereotypic size and/or morphology, and, for cells in vivo, by their anatomic positions. Historically, this identity-structure-function correlation was conceptualized as arising from distinct gene expression programs that dictate how cells appear and behave. However, a growing number of studies suggest that a cell's mechanical state is also an important determinant of its identity, both in lineage-committed cells and in pluripotent stem cells. Defining the mechanism by which mechanical inputs influence complex cellular programs remains an area of ongoing investigation. Here, we discuss how the cytoskeleton actively participates in instructing the response of the nucleus and genome to integrate mechanical and biochemical inputs, with a primary focus on the role of the actomyosin-LINC (linker of nucleoskeleton and cytoskeleton) complex axis.
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18
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Bang ML, Bogomolovas J, Chen J. Understanding the molecular basis of cardiomyopathy. Am J Physiol Heart Circ Physiol 2022; 322:H181-H233. [PMID: 34797172 PMCID: PMC8759964 DOI: 10.1152/ajpheart.00562.2021] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/16/2021] [Accepted: 11/16/2021] [Indexed: 02/03/2023]
Abstract
Inherited cardiomyopathies are a major cause of mortality and morbidity worldwide and can be caused by mutations in a wide range of proteins located in different cellular compartments. The present review is based on Dr. Ju Chen's 2021 Robert M. Berne Distinguished Lectureship of the American Physiological Society Cardiovascular Section, in which he provided an overview of the current knowledge on the cardiomyopathy-associated proteins that have been studied in his laboratory. The review provides a general summary of the proteins in different compartments of cardiomyocytes associated with cardiomyopathies, with specific focus on the proteins that have been studied in Dr. Chen's laboratory.
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Affiliation(s)
- Marie-Louise Bang
- Institute of Genetic and Biomedical Research (IRGB), National Research Council (CNR), Milan Unit, Milan, Italy
- IRCCS Humanitas Research Hospital, Rozzano (Milan), Italy
| | - Julius Bogomolovas
- Division of Cardiovascular Medicine, Department of Medicine Cardiology, University of California, San Diego, La Jolla, California
| | - Ju Chen
- Division of Cardiovascular Medicine, Department of Medicine Cardiology, University of California, San Diego, La Jolla, California
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19
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Chen CW, Huang RL, Do AQ, Wang HC, Lee YX, Wang CW, Hsieh CC, Tzeng CR, Hu YM, Chen CH, Weng YC, Su PH, Chen LY, Lai HC. Genome-wide analysis of cervical secretions obtained during embryo transfer reveals the association between deoxyribonucleic acid methylation and pregnancy outcomes. F&S SCIENCE 2022; 3:74-83. [PMID: 35559997 DOI: 10.1016/j.xfss.2021.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/18/2021] [Accepted: 12/21/2021] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To study whether the methylation status of cervical secretions can reflect the ability of the endometrium to allow embryo implantation. DESIGN Case-control study. SETTING In vitro fertilization centers. PATIENT(S) Women undergoing embryo transfer cycles, in which at least 1 good-quality embryo was transferred. INTERVENTION(S) Collection of cervical secretions during the procedure of embryo transfer. MAIN OUTCOME MEASURE(S) Methylation profiles of cervical secretions in relation to pregnancy outcomes. RESULT(S) Genome-wide methylation profiles differ between cervical secretions from pregnancy and nonpregnancy cycles. Clustering analysis on the basis of the top 2,000 differentially methylated probes of cervical secretions from 28 pregnancy and 29 nonpregnancy cycles correctly categorized 86.0% of the samples in terms of conceptional status, which was verified in selected genes by quantitative methylation-specific polymerase chain reaction and validated in another independent sample set. The combination of selected genes was estimated to predict pregnancy outcomes with a maximal area under the receiver operating characteristic curve of 0.83. CONCLUSION(S) The methylation profiles of cervical secretions were associated with pregnancy outcomes in embryo transfer cycles. Although not clinically useful at present, deoxyribonucleic acid methylation in cervical secretions may shed new light on the less invasive assessment of endometrial receptivity.
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Affiliation(s)
| | - Rui-Lan Huang
- Department of Obstetrics and Gynecology, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan; Translational Epigenetic Center, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan; Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Anh Q Do
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Obstetrics and Gynecology, Hai Phong University of Medicine and Pharmacy, Hai Phong, Vietnam; International Ph.D. Program for Cell Therapy and Regeneration Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hui-Chen Wang
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yi-Xuan Lee
- Translational Epigenetic Center, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan; Graduate Institute of Clinical Medicine, Taipei Medical University, Taipei, Taiwan; Taipei Fertility Center, Taipei, Taiwan
| | | | | | | | | | - Chi-Huang Chen
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Division of Reproductive Medicine, Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan
| | - Yu-Chun Weng
- Translational Epigenetic Center, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan
| | - Po-Hsuan Su
- Department of Obstetrics and Gynecology, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan; Translational Epigenetic Center, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan
| | - Lin-Yu Chen
- Department of Obstetrics and Gynecology, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan; Translational Epigenetic Center, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan
| | - Hung-Cheng Lai
- Department of Obstetrics and Gynecology, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan; Translational Epigenetic Center, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan; Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
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20
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Abstract
The nuclear envelope is composed of the nuclear membranes, nuclear lamina, and nuclear pore complexes. Laminopathies are diseases caused by mutations in genes encoding protein components of the lamina and these other nuclear envelope substructures. Mutations in the single gene encoding lamin A and C, which are expressed in most differentiated somatic cells, cause diseases affecting striated muscle, adipose tissue, peripheral nerve, and multiple systems with features of accelerated aging. Mutations in genes encoding other nuclear envelope proteins also cause an array of diseases that selectively affect different tissues or organs. In some instances, the molecular and cellular consequences of laminopathy-causing mutations are known. However, even when these are understood, mechanisms explaining specific tissue or organ pathology remain enigmatic. Current mechanistic hypotheses focus on how alterations in the nuclear envelope may affect gene expression, including via the regulation of signaling pathways, or cellular mechanics, including responses to mechanical stress.
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Affiliation(s)
- Ji-Yeon Shin
- Department of Medicine and Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Howard J. Worman
- Department of Medicine and Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
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21
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Hou H, Wang X, Yang C, Cai X, Lv W, Tu Y, Bao A, Wu Q, Zhao W, Yao J, Ding W. Comparative Genome and Transcriptome Integration Studies Reveal the Mechanism of Pectoral Muscle Development and Function in Pigeons. Front Genet 2022; 12:735795. [PMID: 34987544 PMCID: PMC8721168 DOI: 10.3389/fgene.2021.735795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 11/26/2021] [Indexed: 11/13/2022] Open
Abstract
Pigeon breed resources provide a genetic model for the study of phenomics. The pectoral muscles play a key role for the meat production performance of the meat pigeon and the athletic ability of the High flyers. Euro-pigeons and Silver King pigeons are commercial varieties that exhibit good meat production performance. In contrast to the domestication direction of meat pigeons, the traditional Chinese ornamental pigeon breed, High flyers, has a small and light body. Here, we investigate the molecular mechanism of the pectoral muscle development and function of pigeons using whole-genome and RNA sequencing data. The selective sweep analysis (FST and log2 (θπ ratio)) revealed 293 and 403 positive selection genes in Euro-pigeons and Silver King, respectively, of which 65 genes were shared. With the Silver King and Euro-pigeon as the control group, the High flyers were selected for 427 and 566 genes respectively. There were 673 differentially expressed genes in the breast muscle transcriptome between the commercial meat pigeons and ornamental pigeons. Pigeon genome selection signal combined with the breast muscle transcriptome revealed that six genes (SLC16A10, S100B, SYNE1, HECW2, CASQ2 and LOC110363470) from commercial varieties of pigeons and five genes (INSC, CALCB, ZBTB21, B2M and LOC110356506) from Chinese traditional ornamental pigeons were positively selected which were involved in pathways related to muscle development and function. This study provides new insights into the selection of different directions and the genetic mechanism related to muscle development in pigeons.
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Affiliation(s)
- Haobin Hou
- Shanghai Academy of Agricultural Sciences, Shanghai, China.,National Poultry Engineer Research Center, Shanghai, China
| | - Xiaoliang Wang
- Shanghai Academy of Agricultural Sciences, Shanghai, China.,National Poultry Engineer Research Center, Shanghai, China
| | - Changsuo Yang
- Shanghai Academy of Agricultural Sciences, Shanghai, China.,National Poultry Engineer Research Center, Shanghai, China
| | - Xia Cai
- Shanghai Academy of Agricultural Sciences, Shanghai, China.,National Poultry Engineer Research Center, Shanghai, China
| | - Wenwei Lv
- National Poultry Engineer Research Center, Shanghai, China
| | - Yingying Tu
- National Poultry Engineer Research Center, Shanghai, China
| | | | - Quanli Wu
- Shanghai Jinhuang Pigeon Company, Shanghai, China
| | - Weimin Zhao
- Shanghai Jinhuang Pigeon Company, Shanghai, China
| | - Junfeng Yao
- Shanghai Academy of Agricultural Sciences, Shanghai, China.,National Poultry Engineer Research Center, Shanghai, China
| | - Weixing Ding
- Shanghai Academy of Agricultural Sciences, Shanghai, China.,National Poultry Engineer Research Center, Shanghai, China
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22
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Roos S, Hedberg-Oldfors C, Visuttijai K, Stein M, Kollberg G, Elíasdóttir Ó, Lindberg C, Darin N, Oldfors A. Expression pattern of mitochondrial respiratory chain enzymes in skeletal muscle of patients with mitochondrial myopathy associated with the homoplasmic m.14674T>C variant. Brain Pathol 2021; 32:e13038. [PMID: 34806237 PMCID: PMC9245933 DOI: 10.1111/bpa.13038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/23/2021] [Accepted: 11/05/2021] [Indexed: 01/31/2023] Open
Abstract
Two homoplasmic variants in tRNAGlu (m.14674T>C/G) are associated with reversible infantile respiratory chain deficiency. This study sought to further characterize the expression of the individual mitochondrial respiratory chain complexes and to describe the natural history of the disease. Seven patients from four families with mitochondrial myopathy associated with the homoplasmic m.14674T>C variant were investigated. All patients underwent skeletal muscle biopsy and mtDNA sequencing. Whole-genome sequencing was performed in one family. Western blot and immunohistochemical analyses were used to characterize the expression of the individual respiratory chain complexes. Patients presented with hypotonia and feeding difficulties within the first weeks or months of life, except for one patient who first showed symptoms at 4 years of age. Histopathological findings in muscle included lipid accumulation, numerous COX-deficient fibers, and mitochondrial proliferation. Ultrastructural abnormalities included enlarged mitochondria with concentric cristae and dense mitochondrial matrix. The m.14674T>C variant in MT-TE was identified in all patients. Immunohistochemistry and immunoblotting demonstrated pronounced deficiency of the complex I subunit NDUFB8. The expression of MTCO1, a complex IV subunit, was also decreased, but not to the same extent as NDUFB8. Longitudinal follow-up data demonstrated that not all features of the disorder are entirely transient, that the disease may be progressive, and that signs and symptoms of myopathy may develop during childhood. This study sheds new light on the involvement of complex I in reversible infantile respiratory chain deficiency, it shows that the disorder may be progressive, and that myopathy can develop without an infantile episode.
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Affiliation(s)
- Sara Roos
- Department of Laboratory Medicine, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Carola Hedberg-Oldfors
- Department of Laboratory Medicine, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Kittichate Visuttijai
- Department of Laboratory Medicine, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - My Stein
- Department of Pediatrics, Helsingborg Hospital, Helsingborg, Sweden
| | - Gittan Kollberg
- Department of Laboratory Medicine, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Ólöf Elíasdóttir
- Department of Neurology, Neuromuscular Center, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Christopher Lindberg
- Department of Neurology, Neuromuscular Center, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Niklas Darin
- Department of Pediatrics, Institute of Clinical Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Anders Oldfors
- Department of Laboratory Medicine, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
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23
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Drosophila Nesprin-1 Isoforms Differentially Contribute to Muscle Function. Cells 2021; 10:cells10113061. [PMID: 34831284 PMCID: PMC8616381 DOI: 10.3390/cells10113061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 12/26/2022] Open
Abstract
Nesprin-1 is a large scaffold protein connecting nuclei to the actin cytoskeleton via its KASH and Calponin Homology domains, respectively. Nesprin-1 disconnection from nuclei results in altered muscle function and myonuclei mispositioning. Furthermore, Nesprin-1 mutations are associated with muscular pathologies such as Emery Dreifuss muscular dystrophy and arthrogryposis. Nesprin-1 was thus proposed to mainly contribute to muscle function by controlling nuclei position. However, Nesprin-1′s localisation at sarcomere’s Z-discs, its involvement in organelles’ subcellular localization, as well as the description of numerous isoforms presenting different combinations of Calponin Homology (CH) and KASH domains, suggest that the contribution of Nesprin-1 to muscle functions is more complex. Here, we investigate the roles of Nesprin-1/Msp300 isoforms in muscle function and subcellular organisation using Drosophila larvae as a model. Subsets of Msp300 isoform were down-regulated by muscle-specific RNAi expression and muscle global function and morphology were assessed. We show that nuclei anchoring in mature muscle and global muscle function are disconnected functions associated with different Msp300 isoforms. Our work further uncovers a new and unsuspected role of Msp300 in myofibril registration and nuclei peripheral displacement supported by Msp300 CH containing isoforms, a function performed by Desmin in mammals.
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24
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Iyer SR, Folker ES, Lovering RM. The Nucleoskeleton: Crossroad of Mechanotransduction in Skeletal Muscle. Front Physiol 2021; 12:724010. [PMID: 34721058 PMCID: PMC8554227 DOI: 10.3389/fphys.2021.724010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 09/24/2021] [Indexed: 11/13/2022] Open
Abstract
Intermediate filaments (IFs) are a primary structural component of the cytoskeleton extending throughout the muscle cell (myofiber). Mechanotransduction, the process by which mechanical force is translated into a biochemical signal to activate downstream cellular responses, is crucial to myofiber function. Mechanical forces also act on the nuclear cytoskeleton, which is integrated with the myofiber cytoskeleton by the linker of the nucleoskeleton and cytoskeleton (LINC) complexes. Thus, the nucleus serves as the endpoint for the transmission of force through the cell. The nuclear lamina, a dense meshwork of lamin IFs between the nuclear envelope and underlying chromatin, plays a crucial role in responding to mechanical input; myofibers constantly respond to mechanical perturbation via signaling pathways by activation of specific genes. The nucleus is the largest organelle in cells and a master regulator of cell homeostasis, thus an understanding of how it responds to its mechanical environment is of great interest. The importance of the cell nucleus is magnified in skeletal muscle cells due to their syncytial nature and the extreme mechanical environment that muscle contraction creates. In this review, we summarize the bidirectional link between the organization of the nucleoskeleton and the contractile features of skeletal muscle as they relate to muscle function.
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Affiliation(s)
- Shama R Iyer
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Eric S Folker
- Department of Biology, Boston College, Chestnut Hill, MA, United States
| | - Richard M Lovering
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, United States.,Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, United States
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25
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van Ingen MJA, Kirby TJ. LINCing Nuclear Mechanobiology With Skeletal Muscle Mass and Function. Front Cell Dev Biol 2021; 9:690577. [PMID: 34368139 PMCID: PMC8335485 DOI: 10.3389/fcell.2021.690577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 06/25/2021] [Indexed: 11/13/2022] Open
Abstract
Skeletal muscle demonstrates a high degree of adaptability in response to changes in mechanical input. The phenotypic transformation in response to mechanical cues includes changes in muscle mass and force generating capabilities, yet the molecular pathways that govern skeletal muscle adaptation are still incompletely understood. While there is strong evidence that mechanotransduction pathways that stimulate protein synthesis play a key role in regulation of muscle mass, there are likely additional mechano-sensitive mechanisms important for controlling functional muscle adaptation. There is emerging evidence that the cell nucleus can directly respond to mechanical signals (i.e., nuclear mechanotransduction), providing a potential additional level of cellular regulation for controlling skeletal muscle mass. The importance of nuclear mechanotransduction in cellular function is evident by the various genetic diseases that arise from mutations in proteins crucial to the transmission of force between the cytoskeleton and the nucleus. Intriguingly, these diseases preferentially affect cardiac and skeletal muscle, suggesting that nuclear mechanotransduction is critically important for striated muscle homeostasis. Here we discuss our current understanding for how the nucleus acts as a mechanosensor, describe the main cytoskeletal and nuclear proteins involved in the process, and propose how similar mechanoresponsive mechanisms could occur in the unique cellular environment of a myofiber. In addition, we examine how nuclear mechanotransduction fits into our current framework for how mechanical stimuli regulates skeletal muscle mass.
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Affiliation(s)
- Maria J A van Ingen
- Biomolecular Sciences, Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Tyler J Kirby
- Department of Physiology, Amsterdam Cardiovascular Sciences, Amsterdam Movement Sciences, Amsterdam UMC, Amsterdam, Netherlands
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26
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Jabre S, Hleihel W, Coirault C. Nuclear Mechanotransduction in Skeletal Muscle. Cells 2021; 10:cells10020318. [PMID: 33557157 PMCID: PMC7913907 DOI: 10.3390/cells10020318] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 12/11/2022] Open
Abstract
Skeletal muscle is composed of multinucleated, mature muscle cells (myofibers) responsible for contraction, and a resident pool of mononucleated muscle cell precursors (MCPs), that are maintained in a quiescent state in homeostatic conditions. Skeletal muscle is remarkable in its ability to adapt to mechanical constraints, a property referred as muscle plasticity and mediated by both MCPs and myofibers. An emerging body of literature supports the notion that muscle plasticity is critically dependent upon nuclear mechanotransduction, which is transduction of exterior physical forces into the nucleus to generate a biological response. Mechanical loading induces nuclear deformation, changes in the nuclear lamina organization, chromatin condensation state, and cell signaling, which ultimately impacts myogenic cell fate decisions. This review summarizes contemporary insights into the mechanisms underlying nuclear force transmission in MCPs and myofibers. We discuss how the cytoskeleton and nuclear reorganizations during myogenic differentiation may affect force transmission and nuclear mechanotransduction. We also discuss how to apply these findings in the context of muscular disorders. Finally, we highlight current gaps in knowledge and opportunities for further research in the field.
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Affiliation(s)
- Saline Jabre
- Sorbonne Université, INSERM UMRS-974 and Institut de Myologie, 75013 Paris, France;
- Department of Biology, Faculty of Arts and Sciences, Holy Spirit University of Kasik (USEK), Jounieh 446, Lebanon;
| | - Walid Hleihel
- Department of Biology, Faculty of Arts and Sciences, Holy Spirit University of Kasik (USEK), Jounieh 446, Lebanon;
- Department of Basic Health Sciences, Faculty of Medicine, Holy Spirit University of Kaslik (USEK), Jounieh 446, Lebanon
| | - Catherine Coirault
- Sorbonne Université, INSERM UMRS-974 and Institut de Myologie, 75013 Paris, France;
- Correspondence:
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27
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Wang X, Zhang H, Huang M, Tang J, Yang L, Yu Z, Li D, Li G, Jiang Y, Sun Y, Wei S, Xu P, Ren J. Whole-genome SNP markers reveal conservation status, signatures of selection, and introgression in Chinese Laiwu pigs. Evol Appl 2021; 14:383-398. [PMID: 33664783 PMCID: PMC7896721 DOI: 10.1111/eva.13124] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 08/18/2020] [Accepted: 08/19/2020] [Indexed: 12/18/2022] Open
Abstract
Laiwu pigs are a Chinese indigenous breed that is renowned for its exceptionally high intramuscular fat content (average greater than 6%), providing an excellent genetic resource for the genetic improvement of meat quality of modern commercial pigs. To uncover genetic diversity, population structure, signature of selection, and potential exotic introgression in this breed, we sampled 238 Laiwu pigs from a state-supported conservation population and genotyped these individuals using GeneSeek 80K SNP BeadChip. We then conducted in-depth population genetics analyses for the Laiwu pig in a context of 1,116 pigs from 42 Eurasian diverse breeds. First, we show that the current Laiwu population has more abundant genetic diversity than the population of 18 years ago likely due to gene flow from European commercial breeds. Both neighbor-joining (NJ) and principal component analyses indicate the introgression of European haplotypes into Laiwu pigs. The admixture analysis reveals that an average 26.66% of Laiwu genetic components are of European origin. Then, we assigned the tested individuals to different families according to their clustering patterns in the NJ tree and proposed a family-based conservation strategy to reduce the risk of inbreeding depression in Laiwu pigs. Next, we explored three statistics (ROH and iHS and EigenGWAS) to identify a list of candidate genes for fat deposition, reproduction, and growth in Laiwu pigs. Last, we detected a strong signature of introgression from European pigs into Laiwu pigs at the GPC6 locus that regulates the growth of developing long bones. Further association analyses indicate that the introgressed GPC6 haplotype likely contributed to the improvement of growth performance in Laiwu pigs. Altogether, this study not only benefits the better conservation of the Laiwu pig, but also advances our knowledge of the poorly understood effect of human-mediated introgression on phenotypic traits in Chinese indigenous pigs.
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Affiliation(s)
- Xiaopeng Wang
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Hui Zhang
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Min Huang
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Jianhong Tang
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Lijuan Yang
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Zhiqiang Yu
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Desen Li
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Guixin Li
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Yongchuang Jiang
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
| | - Yanxiao Sun
- Jinan Conservation Farm for Laiwu PigsJinanChina
| | - Shudong Wei
- Jinan Conservation Farm for Laiwu PigsJinanChina
| | - Pan Xu
- School of Animal Science and TechnologyJiangsu Agri‐animal Husbandry Vocational CollegeTaizhouChina
| | - Jun Ren
- Guangdong Laboratory for Lingnan Modern AgricultureCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouChina
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28
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Using nuclear envelope mutations to explore age-related skeletal muscle weakness. Clin Sci (Lond) 2020; 134:2177-2187. [PMID: 32844998 PMCID: PMC7450176 DOI: 10.1042/cs20190066] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 08/04/2020] [Accepted: 08/17/2020] [Indexed: 12/19/2022]
Abstract
Skeletal muscle weakness is an important determinant of age-related declines in independence and quality of life but its causes remain unclear. Accelerated ageing syndromes such as Hutchinson-Gilford Progerin Syndrome, caused by mutations in genes encoding nuclear envelope proteins, have been extensively studied to aid our understanding of the normal biological ageing process. Like several other pathologies associated with genetic defects to nuclear envelope proteins including Emery-Dreifuss muscular dystrophy, Limb-Girdle muscular dystrophy and congenital muscular dystrophy, these disorders can lead to severe muscle dysfunction. Here, we first describe the structure and function of nuclear envelope proteins, and then review the mechanisms by which mutations in genes encoding nuclear envelope proteins induce premature ageing diseases and muscle pathologies. In doing so, we highlight the potential importance of such genes in processes leading to skeletal muscle weakness in old age.
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29
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Kmonickova V, Frolikova M, Steger K, Komrskova K. The Role of the LINC Complex in Sperm Development and Function. Int J Mol Sci 2020; 21:E9058. [PMID: 33260574 PMCID: PMC7730847 DOI: 10.3390/ijms21239058] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 11/23/2022] Open
Abstract
The LINC (LInker of Nucleoskeleton and Cytoskeleton) complex is localized within the nuclear envelope and consists of SUN (Sad1/UNc84 homology domain-containing) proteins located in the inner nuclear membrane and KASH (Klarsicht/Anc1/Syne1 homology domain-containing) proteins located in the outer nuclear membrane, hence linking nuclear with cytoplasmic structures. While the nucleoplasm-facing side acts as a key player for correct pairing of homolog chromosomes and rapid chromosome movements during meiosis, the cytoplasm-facing side plays a pivotal role for sperm head development and proper acrosome formation during spermiogenesis. A further complex present in spermatozoa is involved in head-to-tail coupling. An intact LINC complex is crucial for the production of fertile sperm, as mutations in genes encoding for complex proteins are known to be associated with male subfertility in both mice and men. The present review provides a comprehensive overview on our current knowledge of LINC complex subtypes present in germ cells and its central role for male reproduction. Future studies on distinct LINC complex components are an absolute requirement to improve the diagnosis of idiopathic male factor infertility and the outcome of assisted reproduction.
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Affiliation(s)
- Vera Kmonickova
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic; (V.K.); (M.F.)
| | - Michaela Frolikova
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic; (V.K.); (M.F.)
| | - Klaus Steger
- Department of Urology, Pediatric Urology and Andrology, Molecular Andrology, Justus-Liebig University, 35392 Giessen, Germany;
| | - Katerina Komrskova
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic; (V.K.); (M.F.)
- Department of Zoology, Faculty of Science, Charles University, Vinicna 7, 128 44 Prague 2, Czech Republic
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30
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Microtubule Organization in Striated Muscle Cells. Cells 2020; 9:cells9061395. [PMID: 32503326 PMCID: PMC7349303 DOI: 10.3390/cells9061395] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/25/2020] [Accepted: 05/28/2020] [Indexed: 12/13/2022] Open
Abstract
Distinctly organized microtubule networks contribute to the function of differentiated cell types such as neurons, epithelial cells, skeletal myotubes, and cardiomyocytes. In striated (i.e., skeletal and cardiac) muscle cells, the nuclear envelope acts as the dominant microtubule-organizing center (MTOC) and the function of the centrosome—the canonical MTOC of mammalian cells—is attenuated, a common feature of differentiated cell types. We summarize the mechanisms known to underlie MTOC formation at the nuclear envelope, discuss the significance of the nuclear envelope MTOC for muscle function and cell cycle progression, and outline potential mechanisms of centrosome attenuation.
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31
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Bostani M, Rahmati M, Mard SA. The effect of endurance training on levels of LINC complex proteins in skeletal muscle fibers of STZ-induced diabetic rats. Sci Rep 2020; 10:8738. [PMID: 32457392 PMCID: PMC7251114 DOI: 10.1038/s41598-020-65793-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 05/11/2020] [Indexed: 02/07/2023] Open
Abstract
The changes of the linker of nucleoskeleton and cytoskeleton (LINC) complex have been studied in many muscular abnormality conditions; however, the effects of diabetes and physical activities on it have still remained to be defined. Therefore, the purpose of the this study was to evaluate the impacts of a six-week endurance training on the levels of SUN1 and Nesprin-1 proteins in Soleus and EDL muscles from diabetic wistar rats. A total number of 48 male Wistar rats (10 weeks, 200-250 gr) were randomly divided into healthy control (HC, N = 12), healthy trained (HT, N = 12), diabetic control (DC, N = 12), and diabetic trained (DT, N = 12) groups. Diabetes was also induced by a single intraperitoneally injection of streptozocin (45 mg/kg). The training groups ran a treadmill for five consecutive days within six weeks. The levels of the SUN1 and the Nesprin-1 proteins were further determined via ELISA method. The induction of diabetes had significantly decreased the levels of Nesprin-1 protein in the soleus and EDL muscles but it had no effects on the SUN1 in these muscles. As well, the findings revealed that six weeks of endurance training had significantly increased the levels of Nesprin-1 in DT and HT groups in the soleus as well as the EDL muscles; however, it had no impacts on the SUN1 in these muscles. The muscle fiber cross-sectional area (CSA) and myonuclei also decreased in diabetic control rats in both studied muscles. The training further augmented these parameters in both studied muscles in HT and DT groups. The present study provides new evidence that diabetes changes Nesprin-1 protein levels in skeletal muscle and endurance exercise training can modify it.
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Affiliation(s)
- Mehdi Bostani
- Department of Physical Education, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
| | - Masoud Rahmati
- Department of Physical Education and Sport Sciences, Faculty of Literature and Human Sciences, Lorestan University, Khoramabad, Iran.
| | - Seyyed Ali Mard
- Alimentary Tract Research Center and Physiology Research Center, Department of Physiology, The School of Medicine, Jundishapur University of Medical Sciences, Ahvaz, Iran
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32
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Zhang J, Vincent KP, Peter AK, Klos M, Cheng H, Huang SM, Towne JK, Ferng D, Gu Y, Dalton ND, Chan Y, Li R, Peterson KL, Chen J, McCulloch AD, Knowlton KU, Ross RS. Cardiomyocyte Expression of ZO-1 Is Essential for Normal Atrioventricular Conduction but Does Not Alter Ventricular Function. Circ Res 2020; 127:284-297. [PMID: 32345129 DOI: 10.1161/circresaha.119.315539] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE ZO-1 (Zonula occludens-1), a plasma membrane-associated scaffolding protein regulates signal transduction, transcription, and cellular communication. Global deletion of ZO-1 in the mouse is lethal by embryonic day 11.5. The function of ZO-1 in cardiac myocytes (CM) is largely unknown. OBJECTIVE To determine the function of CM ZO-1 in the intact heart, given its binding to other CM proteins that have been shown instrumental in normal cardiac conduction and function. METHODS AND RESULTS We generated ZO-1 CM-specific knockout (KO) mice using α-Myosin Heavy Chain-nuclear Cre (ZO-1cKO) and investigated physiological and electrophysiological function by echocardiography, surface ECG and conscious telemetry, intracardiac electrograms and pacing, and optical mapping studies. ZO-1cKO mice were viable, had normal Mendelian ratios, and had a normal lifespan. Ventricular morphometry and function were not significantly different between the ZO-1cKO versus control (CTL) mice, basally in young or aged mice, or even when hearts were subjected to hemodynamic loading. Atrial mass was increased in ZO-1cKO. Electrophysiological and optical mapping studies indicated high-grade atrioventricular (A-V) block in ZO-1cKO comparing to CTL hearts. While ZO-1-associated proteins such as vinculin, connexin 43, N-cadherin, and α-catenin showed no significant change with the loss of ZO-1, Connexin-45 and Coxsackie-adenovirus (CAR) proteins were reduced in atria of ZO-1cKO. Further, with loss of ZO-1, ZO-2 protein was increased significantly in ventricular CM in a presumed compensatory manner but was still not detected in the AV nodal myocytes. Importantly, the expression of the sodium channel protein NaV1.5 was altered in AV nodal cells of the ZO-1cKO versus CTL. CONCLUSIONS ZO-1 protein has a unique physiological role in cardiac nodal tissue. This is in alignment with its known interaction with CAR and Cx45, and a new function in regulating the expression of NaV1.5 in AV node. Uniquely, ZO-1 is dispensable for function of the working myocardium.
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Affiliation(s)
- Jianlin Zhang
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Kevin P Vincent
- Department of Bioengineering (K.P.V., A.D.M.), University of California San Diego, La Jolla, CA
| | - Angela K Peter
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Matthew Klos
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Hongqiang Cheng
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Selina M Huang
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Jordan K Towne
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Debbie Ferng
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Yusu Gu
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Nancy D Dalton
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Yunghang Chan
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Ruixia Li
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Kirk L Peterson
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Ju Chen
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
| | - Andrew D McCulloch
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
- Department of Bioengineering (K.P.V., A.D.M.), University of California San Diego, La Jolla, CA
| | | | - Robert S Ross
- From the Department of Medicine (J.Z., A.K.P., M.K., H.C., S.M.H., J.K.T., D.F., Y.G., N.D.D., Y.C., J.K.T., D.F., Y.G., N.D.D., Y.C., R.L., K.L.P., J.C., A.D.M., R.S.R.), University of California San Diego, La Jolla, CA
- Veterans Administration Healthcare, Cardiology Section, San Diego, CA (R.S.R.)
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Alena SK, Eva B, Aleš K, Emilie L. Spatiotemporal Mislocalization of Nuclear Membrane-Associated Proteins in γ-Irradiation-Induced Senescent Cells. Cells 2020; 9:E999. [PMID: 32316379 PMCID: PMC7227243 DOI: 10.3390/cells9040999] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/09/2020] [Accepted: 04/11/2020] [Indexed: 01/01/2023] Open
Abstract
Cellular senescence, induced by genotoxic or replication stress, is accompanied by defects in nuclear morphology and nuclear membrane-heterochromatin disruption. In this work, we analyzed cytological and molecular changes in the linker of nucleoskeleton and cytoskeleton (LINC) complex proteins in senescence triggered by γ-irradiation. We used human mammary carcinoma and osteosarcoma cell lines, both original and shRNA knockdown clones targeting lamin B receptor (LBR) and leading to LBR and lamin B (LB1) reduction. The expression status and integrity of LINC complex proteins (nesprin-1, SUN1, SUN2), lamin A/C, and emerin were analyzed by immunodetection using confocal microscopy and Western blot. The results show frequent mislocalization of these proteins from the nuclear membrane to cytoplasm and micronuclei and, in some cases, their fragmentation and amplification. The timing of these changes clearly preceded the onset of senescence. The LBR deficiency triggered neither senescence nor changes in the LINC protein distribution before irradiation. However, the cytological changes following irradiation were more pronounced in shRNA knockdown cells compared to original cell lines. We conclude that mislocalization of LINC complex proteins is a significant characteristic of cellular senescence phenotypes and may influence complex events at the nuclear membrane, including trafficking and heterochromatin attachment.
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Affiliation(s)
- Svobodová Kovaříková Alena
- Laboratory of Molecular Cytology and Cytometry, Institute of Biophysics, Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic; (S.K.A.); (B.E.)
| | - Bártová Eva
- Laboratory of Molecular Cytology and Cytometry, Institute of Biophysics, Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic; (S.K.A.); (B.E.)
| | - Kovařík Aleš
- Laboratory of Molecular Epigenetics, Institute of Biophysics, Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic;
| | - Lukášová Emilie
- Laboratory of Molecular Epigenetics, Institute of Biophysics, Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic;
- Laboratory of Cell Biology and Radiobiology and Laboratory of Molecular Epigenetics, Institute of Biophysics, Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic
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Faraj Shaglouf LH, Ranjpour M, Wajid S, Jain SK. Elevated expression of cellular SYNE1, MMP10, and GTPase1 and their regulatory role in hepatocellular carcinoma progression. PROTOPLASMA 2020; 257:157-167. [PMID: 31428857 DOI: 10.1007/s00709-019-01423-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 07/19/2019] [Indexed: 06/10/2023]
Abstract
Hepatocellular carcinoma (HCC) is the most common primary liver malignancy resulting in high mortality. HCC progression is associated with abnormal signal transduction that changes cell signaling pathways and ultimately leads to dysregulation of cell functions and uncontrolled cell proliferation. Present study was undertaken with the objective to identify differentially expressed proteins and quantify their transcript expression in the liver of HCC-bearing rats vis-à-vis controls and to decipher the network involving interaction of genes coding for the characterized proteins to an insight into mechanism of HCC tumorigenesis. 2D-Electrophoresis and MALDI-TOF-MS/MS were used to characterize differentially expressed proteins in DEN (diethylnitrosamine)-induced HCC tissue using the protocol reported by us earlier. Real-time PCR was performed to quantify the expression of transcripts for the identified proteins. GENEMANIA, an interacting network of genes coding for selected proteins, was deciphered that provided the functional role of these proteins in HCC progression. Upregulation of proteins SYNE1, MMP10, and MTG1 was observed. The mRNA quantification revealed elevated expression of their transcripts at HCC initiation, progression, and tumor stages. Network analysis showed the involvement of the genes coding for these proteins in dysregulation of signaling pathways during HCC development. The elevated expression of SYNE1, MMP10, and MTG1 suggests the role of these proteins as potential players in HCC progression and tumorigenesis.
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Affiliation(s)
- Laila H Faraj Shaglouf
- Department of Biotechnology, School of Chemical and Life Science, Jamia Hamdard, New Delhi, 110062, India
| | - Maryam Ranjpour
- Department of Biotechnology, School of Chemical and Life Science, Jamia Hamdard, New Delhi, 110062, India
| | - Saima Wajid
- Department of Biotechnology, School of Chemical and Life Science, Jamia Hamdard, New Delhi, 110062, India
| | - Swatantra Kumar Jain
- Department of Biochemistry, Hamdard Institute of Medical Science and Research, Jamia Hamdard, New Delhi, 110062, India.
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Sur-Erdem I, Hussain MS, Asif M, Pınarbası N, Aksu AC, Noegel AA. Nesprin-1 impact on tumorigenic cell phenotypes. Mol Biol Rep 2019; 47:921-934. [PMID: 31741263 DOI: 10.1007/s11033-019-05184-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Accepted: 11/07/2019] [Indexed: 12/24/2022]
Abstract
The largest protein of the nuclear envelope (NE) is Nesprin-1 which forms a network along the NE interacting with actin, Emerin, Lamin, and SUN proteins. Mutations in the SYNE1 gene and reduction in Nesprin-1 protein levels have been reported to correlate with several age related diseases and cancer. In the present study, we tested whether Nesprin-1 overexpression can reverse the malignant phenotype of Huh7 cells, a human liver cancer cell line, which carries a mutation in the SYNE1 gene resulting in reduced Nesprin-1 protein levels, has altered nuclear shape, altered amounts and localization of NE components, centrosome localization and genome stability. Ectopic expression of a mini-Nesprin-1 led to an improvement of the nuclear shape, corrected the mislocalization of NE proteins, the centrosome positioning, and the alterations in the DNA damage response network. Additionally, Nesprin-1 had a profound effect on cellular senescence. These findings suggest that Nesprin-1 may be effective in tumorigenic cell phenotype correction of human liver cancer.
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Affiliation(s)
- Ilknur Sur-Erdem
- Institute of Biochemistry I, Medical Faculty, University Hospital Cologne, Cologne, Germany. .,Center for Molecular Medicine Cologne (CMMC) and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany. .,Koç University School of Medicine, 34450, Istanbul, Turkey. .,Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey.
| | - Muhammed Sajid Hussain
- Institute of Biochemistry I, Medical Faculty, University Hospital Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC) and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.,Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Maria Asif
- Institute of Biochemistry I, Medical Faculty, University Hospital Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC) and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.,Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Nareg Pınarbası
- Koç University School of Medicine, 34450, Istanbul, Turkey.,Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Ali Cenk Aksu
- Koç University School of Medicine, 34450, Istanbul, Turkey.,Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Angelika A Noegel
- Institute of Biochemistry I, Medical Faculty, University Hospital Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC) and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
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36
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Nguyen BT, Pyun JC, Lee SG, Kang MJ. Identification of new binding proteins of focal adhesion kinase using immunoprecipitation and mass spectrometry. Sci Rep 2019; 9:12908. [PMID: 31501460 PMCID: PMC6733923 DOI: 10.1038/s41598-019-49145-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 04/03/2019] [Indexed: 02/07/2023] Open
Abstract
Focal adhesion kinase (FAK) is a 125 kDa protein recruited as a participant in focal adhesion dynamics and serves as a signaling scaffold for the assembly and subsequent maturation of focal contact. Identification of new FAK binding proteins could reveal potential signaling targets and contribute to further development of therapeutic drugs in the treatment of colon cancer. Here, we applied a functional proteomic strategy to identify proteins that interact with FAK in human colon cancer cell line HCT-116. Proteins were targeted by coimmunoprecipitation with an anti-FAK antibody and resolved on 1D-SDS-PAGE. The gel was excised, reduced, alkylated, and trypsin digested. Tryptic peptides were separated by nano-LC-MS/MS by an LTQ-Orbitrap-Velos spectrometer. We identified 101 proteins in the immunocomplex under epithelial growth factor (EGF) stimulation. Three proteins, zyxin, nesprin-1, and desmoplakin, were discovered and validated using reciprocal immunoprecipitation and Western blot analysis. Then, we sought to study the biological relevance of these proteins by siRNA transfection of HCT-116 cells. According to the results, zyxin might play a central role as an upstream regulator to mediate critical cancer-related signaling pathways. Zyxin and nesprin-1 depletion significantly impaired cell migration and invasion capabilities. Additionally, we performed ELISA assays on serum samples from patients with colon cancer instead of cell models to quantify the protein levels of zyxin and nesprin-1. Our results suggested that zyxin and nesprin-1 are not only promising therapeutic targets but also potential diagnostic biomarkers for colon cancer.
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Affiliation(s)
- Binh Thanh Nguyen
- Molecular Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, South Korea.,Division of Bio-Medical Science and Technology (Biological Chemistry), Korea University of Science and Technology (UST), Daejeon, 34113, South Korea
| | - Jae-Chul Pyun
- Department of Materials and Sciences, Yonsei University, Seoul, 120-749, South Korea
| | - Sang-Guk Lee
- Department of Laboratory Medicine, Severance Hospital, Seoul, 120-752, South Korea. .,Yonsei University College of Medicine, Seoul, 120-752, South Korea.
| | - Min-Jung Kang
- Molecular Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, South Korea. .,Division of Bio-Medical Science and Technology (Biological Chemistry), Korea University of Science and Technology (UST), Daejeon, 34113, South Korea.
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37
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Kirby TJ. Mechanosensitive pathways controlling translation regulatory processes in skeletal muscle and implications for adaptation. J Appl Physiol (1985) 2019; 127:608-618. [PMID: 31295035 DOI: 10.1152/japplphysiol.01031.2018] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The ability of myofibers to sense and respond appropriately to mechanical signals is one of the primary determinants of the skeletal muscle phenotype. In response to a change in mechanical load, muscle cells alter their protein metabolism, primarily through the regulation of protein synthesis rate. Protein synthesis rates are determined by both translation efficiency and translational capacity within the muscle. Translational capacity is strongly determined by the ribosome content of the muscle; thus the regulation of ribosomal biogenesis by mechanical inputs has been an area of recent interest. Despite the clear association between mechanical signals and changes in protein metabolism, the molecular pathways that link these events are still not fully elucidated. This review focuses on recent studies looking at how mechanosignaling impacts translational events. The role of impaired mechanotransduction in aging is discussed, as is the connection between age-dependent signaling defects and compromised ribosomal biogenesis during mechanical overload. Finally, emerging evidence suggests that the nucleus can act as a mechanosensitive element and that this mode of mechanotransduction may have an important role in skeletal muscle physiology and adaptation.
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Affiliation(s)
- Tyler J Kirby
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York.,Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, New York
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Prata DP, Costa-Neves B, Cosme G, Vassos E. Unravelling the genetic basis of schizophrenia and bipolar disorder with GWAS: A systematic review. J Psychiatr Res 2019; 114:178-207. [PMID: 31096178 DOI: 10.1016/j.jpsychires.2019.04.007] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 04/08/2019] [Accepted: 04/10/2019] [Indexed: 01/02/2023]
Abstract
OBJECTIVES To systematically review findings of GWAS in schizophrenia (SZ) and in bipolar disorder (BD); and to interpret findings, with a focus on identifying independent replications. METHOD PubMed search, selection and review of all independent GWAS in SZ or BD, published since March 2011, i.e. studies using non-overlapping samples within each article, between articles, and with those of the previous review (Li et al., 2012). RESULTS From the 22 GWAS included in this review, the genetic associations surviving standard GWAS-significance were for genetic markers in the regions of ACSL3/KCNE4, ADCY2, AMBRA1, ANK3, BRP44, DTL, FBLN1, HHAT, INTS7, LOC392301, LOC645434/NMBR, LOC729457, LRRFIP1, LSM1, MDM1, MHC, MIR2113/POU3F2, NDST3, NKAPL, ODZ4, PGBD1, RENBP, TRANK1, TSPAN18, TWIST2, UGT1A1/HJURP, WHSC1L1/FGFR1 and ZKSCAN4. All genes implicated across both reviews are discussed in terms of their function and implication in neuropsychiatry. CONCLUSION Taking all GWAS to date into account, AMBRA1, ANK3, ARNTL, CDH13, EFHD1 (albeit with different alleles), MHC, PLXNA2 and UGT1A1 have been implicated in either disorder in at least two reportedly non-overlapping samples. Additionally, evidence for a SZ/BD common genetic basis is most strongly supported by the implication of ANK3, NDST3, and PLXNA2.
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Affiliation(s)
- Diana P Prata
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Portugal; Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology & Neuroscience, King's College London, 16 De Crespigny Park, SE5 8AF, UK; Instituto Universitário de Lisboa (ISCTE-IUL), Centro de Investigação e Intervenção Social, Lisboa, Portugal.
| | - Bernardo Costa-Neves
- Lisbon Medical School, University of Lisbon, Av. Professor Egas Moniz, 1649-028, Lisbon, Portugal; Centro Hospitalar Psiquiátrico de Lisboa, Av. do Brasil, 53 1749-002, Lisbon, Portugal
| | - Gonçalo Cosme
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Portugal
| | - Evangelos Vassos
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, 16 De Crespigny Park, SE5 8AF, UK
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Abstract
Microtubule-organizing centers move from centrosomes to the nuclear envelope during muscle development. The KASH protein Nesprin-1α recruits pericentriolar material to the surface of myotube nuclei, where it nucleates microtubules to ensure even spacing of nuclei within the developing myotube.
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Affiliation(s)
- Daniel A Starr
- Department of Molecular and Cellular Biology, University of California, Davis, USA.
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40
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Sandra M, Maria Pia L, Stefano C, Pietro P, Crociani P, Aldo R, Giuseppe DS, Massimo C. Emery-Dreifuss muscular dystrophy type 4: A new SYNE1 mutation associated with hypertrophic cardiomyopathy masked by a perinatal distress-related spastic diplegia. Clin Case Rep 2019; 7:1078-1082. [PMID: 31110749 PMCID: PMC6509902 DOI: 10.1002/ccr3.2140] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 02/20/2019] [Indexed: 12/12/2022] Open
Abstract
Hypertrophic cardiomyopathy could be part of a more complex syndrome like Emery-Dreifuss muscular dystrophy type 4. Genetic analysis allowed to identify a de novo heterozygous missense mutation in SYNE1 gene (chr6:152665253:G > C), supporting physician to reach a correct diagnosis in patient affected by cardiomyopathy associated with a difficult clinical scenario.
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Affiliation(s)
- Mastroianno Sandra
- Cardiovascular DepartmentFondazione IRCCS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Leone Maria Pia
- Clinical Genetic UnitFondazione IRCCS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Castellana Stefano
- Bioinformatics UnitFondazione IRCCS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Palumbo Pietro
- Clinical Genetic UnitFondazione IRCCS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Paola Crociani
- Neurology UnitFondazione IRCCS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Russo Aldo
- Cardiovascular DepartmentFondazione IRCCS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Di Stolfo Giuseppe
- Cardiovascular DepartmentFondazione IRCCS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Carella Massimo
- Clinical Genetic UnitFondazione IRCCS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
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41
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Fongy A, Falcone S, Lainé J, Prudhon B, Martins-Bach A, Bitoun M. Nuclear defects in skeletal muscle from a Dynamin 2-linked centronuclear myopathy mouse model. Sci Rep 2019; 9:1580. [PMID: 30733559 PMCID: PMC6367339 DOI: 10.1038/s41598-018-38184-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 12/21/2018] [Indexed: 12/21/2022] Open
Abstract
Dynamin 2 (DNM2) is a key protein of the endocytosis and intracellular membrane trafficking machinery. Mutations in the DNM2 gene cause autosomal dominant centronuclear myopathy (CNM) and a knock-in mouse model expressing the most frequent human DNM2 mutation in CNM (Knock In-Dnm2R465W/+) develops a myopathy sharing similarities with human disease. Using isolated muscle fibres from Knock In-Dnm2R465W/+ mice, we investigated number, spatial distribution and morphology of myonuclei. We showed a reduction of nuclear number from 20 weeks of age in Tibialis anterior muscle from heterozygous mice. This reduction is associated with a decrease in the satellite cell content in heterozygous muscles. The concomitant reduction of myonuclei number and cross-section area in the heterozygous fibres contributes to largely maintain myonuclear density and volume of myonuclear domain. Moreover, we identified signs of impaired spatial nuclear distribution including alteration of distance from myonuclei to their nearest neighbours and change in orientation of the nuclei. This study highlights reduction of number of myonuclei, a key regulator of the myofiber size, as a new pathomechanism underlying muscle atrophy in the dominant centronuclear myopathy. In addition, this study opens a new line of investigation which could prove particularly important on satellite cells in dominant centronuclear myopathy.
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Affiliation(s)
- Anaïs Fongy
- Sorbonne Université, INSERM, Institute of Myology, Centre of Research in Myology, UMRS 974, F-75013, Paris, France
| | - Sestina Falcone
- Sorbonne Université, INSERM, Institute of Myology, Centre of Research in Myology, UMRS 974, F-75013, Paris, France
| | - Jeanne Lainé
- Sorbonne Université, INSERM, Institute of Myology, Centre of Research in Myology, UMRS 974, F-75013, Paris, France
| | - Bernard Prudhon
- Sorbonne Université, INSERM, Institute of Myology, Centre of Research in Myology, UMRS 974, F-75013, Paris, France
| | - Aurea Martins-Bach
- Institute of Myology, NMR Laboratory, Paris, France.,CEA, DRF, IBFJ, MIRCen, NMR Laboratory, Paris, France
| | - Marc Bitoun
- Sorbonne Université, INSERM, Institute of Myology, Centre of Research in Myology, UMRS 974, F-75013, Paris, France.
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42
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Rosen JN, Azevedo M, Soffar DB, Boyko VP, Brendel MB, Schulman VK, Baylies MK. The Drosophila Ninein homologue Bsg25D cooperates with Ensconsin in myonuclear positioning. J Cell Biol 2019; 218:524-540. [PMID: 30626718 PMCID: PMC6363458 DOI: 10.1083/jcb.201808176] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/26/2018] [Accepted: 11/28/2018] [Indexed: 01/09/2023] Open
Abstract
Rosen et al. identify a role for the centrosomal protein Bsg25D/Ninein in nuclear positioning and microtubule organization in Drosophila muscle fibers. Genetic, cell biological, and atomic force microscopy analyses demonstrate that complex interactions between Bsg25D and the microtubule-associated protein Ensconsin govern myonuclear positioning in Drosophila. Skeletal muscle consists of multinucleated cells in which the myonuclei are evenly spaced throughout the cell. In Drosophila, this pattern is established in embryonic myotubes, where myonuclei move via microtubules (MTs) and the MT-associated protein Ensconsin (Ens)/MAP7, to achieve their distribution. Ens regulates multiple aspects of MT biology, but little is known about how Ens itself is regulated. We find that Ens physically interacts and colocalizes with Bsg25D, the Drosophila homologue of the centrosomal protein Ninein. Bsg25D loss enhances myonuclear positioning defects in embryos sensitized by partial Ens loss. Bsg25D overexpression causes severe positioning defects in immature myotubes and fully differentiated myofibers, where it forms ectopic MT organizing centers, disrupts perinuclear MT arrays, reduces muscle stiffness, and decreases larval crawling velocity. These studies define a novel relationship between Ens and Bsg25D. At endogenous levels, Bsg25D positively regulates Ens activity during myonuclear positioning, but excess Bsg25D disrupts Ens localization and MT organization, with disastrous consequences for myonuclear positioning and muscle function.
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Affiliation(s)
- Jonathan N Rosen
- Program in Developmental Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Mafalda Azevedo
- Program in Developmental Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY.,Graduate Program in Areas of Basic and Applied Biology, Abel Salazar Biomedical Sciences Institute, University of Porto, Porto, Portugal
| | - David B Soffar
- Program in Developmental Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Vitaly P Boyko
- Program in Developmental Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY.,Molecular Cytology Facility, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Matthew B Brendel
- Program in Developmental Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY.,Molecular Cytology Facility, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Victoria K Schulman
- Program in Developmental Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY.,Cell and Developmental Biology, Weill Cornell Graduate School of Medical Sciences, Cornell University, New York, NY
| | - Mary K Baylies
- Program in Developmental Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY .,Cell and Developmental Biology, Weill Cornell Graduate School of Medical Sciences, Cornell University, New York, NY
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43
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Perillo M, Folker ES. Specialized Positioning of Myonuclei Near Cell-Cell Junctions. Front Physiol 2018; 9:1531. [PMID: 30443220 PMCID: PMC6221937 DOI: 10.3389/fphys.2018.01531] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 10/11/2018] [Indexed: 11/13/2022] Open
Abstract
Skeletal muscles are large cells with multiple nuclei that are precisely positioned. The importance of the correct nuclear position is highlighted by the correlation between mispositioned nuclei and muscle disease (Spiro et al., 1966; Gueneau et al., 2009). Myonuclei are generally considered to be equivalent and therefore how far nuclei are from their nearest neighbor is the primary measurement of nuclear positioning. However, skeletal muscles have two specialized cell-cell contacts, the neuromuscular (NMJ) and the myotendinous junction (MTJ). Using these cell-cell contacts as reference points, we have determined that there are at least two distinct populations of myonuclei whose position is uniquely regulated. The post-synaptic myonuclei (PSMs) near the NMJ, and the myonuclei near the myotendinous junction myonuclei (MJMs) have different spacing requirements compared to other myonuclei. The correct positioning of pairs of PSMs depends on the specific action of dynein and kinesin. Positions of the PSMs and MJMs relative to the junctions that define them depend on the KASH-domain protein, Klar. We also found that MJMs are positioned close to the MTJ as a consequence of muscle stretching. Our study defines for the first time that nuclei in skeletal muscles are not all equally positioned, and that subsets of distinct myonuclei have specialized rules that dictate their spacing.
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Affiliation(s)
| | - Eric S. Folker
- Department of Biology, Boston College, Chestnut Hill, MA, United States
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Brull A, Morales Rodriguez B, Bonne G, Muchir A, Bertrand AT. The Pathogenesis and Therapies of Striated Muscle Laminopathies. Front Physiol 2018; 9:1533. [PMID: 30425656 PMCID: PMC6218675 DOI: 10.3389/fphys.2018.01533] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 10/11/2018] [Indexed: 01/04/2023] Open
Abstract
Emery-Dreifuss muscular dystrophy (EDMD) is a genetic condition characterized by early contractures, skeletal muscle weakness, and cardiomyopathy. During the last 20 years, various genetic approaches led to the identification of causal genes of EDMD and related disorders, all encoding nuclear envelope proteins. By their respective localization either at the inner nuclear membrane or the outer nuclear membrane, these proteins interact with each other and establish a connection between the nucleus and the cytoskeleton. Beside this physical link, these proteins are also involved in mechanotransduction, responding to environmental cues, such as increased tension of the cytoskeleton, by the activation or repression of specific sets of genes. This ability of cells to adapt to environmental conditions is altered in EDMD. Increased knowledge on the pathophysiology of EDMD has led to the development of drug or gene therapies that have been tested on mouse models. This review proposed an overview of the functions played by the different proteins involved in EDMD and related disorders and the current therapeutic approaches tested so far.
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Affiliation(s)
- Astrid Brull
- Sorbonne Université, INSERM, Institut de Myologie, Center of Research in Myology, UMRS 974, Paris, France
| | - Blanca Morales Rodriguez
- Sorbonne Université, INSERM, Institut de Myologie, Center of Research in Myology, UMRS 974, Paris, France.,Sanofi R&D, Chilly Mazarin, France
| | - Gisèle Bonne
- Sorbonne Université, INSERM, Institut de Myologie, Center of Research in Myology, UMRS 974, Paris, France
| | - Antoine Muchir
- Sorbonne Université, INSERM, Institut de Myologie, Center of Research in Myology, UMRS 974, Paris, France
| | - Anne T Bertrand
- Sorbonne Université, INSERM, Institut de Myologie, Center of Research in Myology, UMRS 974, Paris, France
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Janin A, Gache V. Nesprins and Lamins in Health and Diseases of Cardiac and Skeletal Muscles. Front Physiol 2018; 9:1277. [PMID: 30245638 PMCID: PMC6137955 DOI: 10.3389/fphys.2018.01277] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 08/22/2018] [Indexed: 12/26/2022] Open
Abstract
Since the discovery of the inner nuclear transmembrane protein emerin in the early 1990s, nuclear envelope (NE) components and related involvement in nuclei integrity and functionality have been highly investigated. The NE is composed of two distinct lipid bilayers described as the inner (INM) and outer (ONM) nuclear membrane. NE proteins can be specifically “integrated” in the INM (such as emerin and SUN proteins) or in the ONM such as nesprins. Additionally, flanked to the INM, the nuclear lamina, a proteinaceous meshwork mainly composed of lamins A and C completes NE composition. This network of proteins physically interplays to guarantee NE integrity and most importantly, shape the bridge between cytoplasmic cytoskeletons networks (such as microtubules and actin) and the genome, through the anchorage to the heterochromatin. The essential network driving the connection of nucleoskeleton with cytoskeleton takes place in the perinuclear space (the space between ONM and INM) with the contribution of the LINC complex (for Linker of Nucleoskeleton to Cytoskeleton), hosting KASH and SUN proteins interactions. This close interplay between compartments has been related to diverse functions from nuclear integrity, activity and positioning through mechanotransduction pathways. At the same time, mutations in NE components genes coding for proteins such as lamins or nesprins, had been associated with a wide range of congenital diseases including cardiac and muscular diseases. Although most of these NE associated proteins are ubiquitously expressed, a large number of tissue-specific disorders have been associated with diverse pathogenic mutations. Thus, diagnosis and molecular explanation of this group of diseases, commonly called “nuclear envelopathies,” is currently challenging. This review aims, first, to give a better understanding of diverse functions of the LINC complex components, from the point of view of lamins and nesprins. Second, to summarize human congenital diseases with a special focus on muscle and heart abnormalities, caused by mutations in genes coding for these two types of NE associated proteins.
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Affiliation(s)
- Alexandre Janin
- CNRS UMR5310, INSERM U1217, Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France.,Laboratoire de Cardiogénétique Moléculaire, Centre de Biologie et Pathologie Est, Hospices Civils de Lyon, Bron, France
| | - Vincent Gache
- CNRS UMR5310, INSERM U1217, Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
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46
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Linker of nucleoskeleton and cytoskeleton complex proteins in cardiomyopathy. Biophys Rev 2018; 10:1033-1051. [PMID: 29869195 PMCID: PMC6082319 DOI: 10.1007/s12551-018-0431-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 05/24/2018] [Indexed: 12/21/2022] Open
Abstract
The linker of nucleoskeleton and cytoskeleton (LINC) complex couples the nuclear lamina to the cytoskeleton. The LINC complex and its associated proteins play diverse roles in cells, ranging from genome organization, nuclear morphology, gene expression, to mechanical stability. The importance of a functional LINC complex is highlighted by the large number of mutations in genes encoding LINC complex proteins that lead to skeletal and cardiac myopathies. In this review, the structure, function, and interactions between components of the LINC complex will be described. Mutations that are known to cause cardiomyopathy in patients will be discussed alongside their respective mouse models. Furthermore, future challenges for the field and emerging technologies to investigate LINC complex function will be discussed.
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47
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Mouse models of nesprin-related diseases. Biochem Soc Trans 2018; 46:669-681. [PMID: 29784648 DOI: 10.1042/bst20180085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/05/2018] [Accepted: 04/20/2018] [Indexed: 02/05/2023]
Abstract
Nesprins (nuclear envelope spectrin repeat proteins) are a family of multi-isomeric scaffolding proteins. Nesprins form the LInker of Nucleoskeleton-and-Cytoskeleton (LINC) complex with SUN (Sad1p/UNC84) domain-containing proteins at the nuclear envelope, in association with lamin A/C and emerin, linking the nucleoskeleton to the cytoskeleton. The LINC complex serves as both a physical linker between the nuclear lamina and the cytoskeleton and a mechanosensor. The LINC complex has a broad range of functions and is involved in maintaining nuclear architecture, nuclear positioning and migration, and also modulating gene expression. Over 80 disease-related variants have been identified in SYNE-1/2 (nesprin-1/2) genes, which result in muscular or central nervous system disorders including autosomal dominant Emery-Dreifuss muscular dystrophy, dilated cardiomyopathy and autosomal recessive cerebellar ataxia type 1. To date, 17 different nesprin mouse lines have been established to mimic these nesprin-related human diseases, which have provided valuable insights into the roles of nesprin and its scaffold LINC complex in a tissue-specific manner. In this review, we summarise the existing nesprin mouse models, compare their phenotypes and discuss the potential mechanisms underlying nesprin-associated diseases.
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48
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Stroud MJ, Fang X, Zhang J, Guimarães-Camboa N, Veevers J, Dalton ND, Gu Y, Bradford WH, Peterson KL, Evans SM, Gerace L, Chen J. Luma is not essential for murine cardiac development and function. Cardiovasc Res 2018; 114:378-388. [PMID: 29040414 PMCID: PMC6019056 DOI: 10.1093/cvr/cvx205] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 10/11/2017] [Indexed: 12/13/2022] Open
Abstract
AIMS Luma is a recently discovered, evolutionarily conserved protein expressed in mammalian heart, which is associated with the LInker of Nucleoskeleton and Cytoskeleton (LINC) complex. The LINC complex structurally integrates the nucleus and the cytoplasm and plays a critical role in mechanotransduction across the nuclear envelope. Mutations in several LINC components in both humans and mice result in various cardiomyopathies, implying they play essential, non-redundant roles. A single amino acid substitution of serine 358 to leucine (S358L) in Luma is the unequivocal cause of a distinct form of arrhythmogenic cardiomyopathy. However, the role of Luma in heart has remained obscure. In addition, it also remains to be determined how the S358L mutation in Luma leads to cardiomyopathy. METHODS AND RESULTS To determine the role of Luma in the heart, we first determined the expression pattern of Luma in mouse heart. Luma was sporadically expressed in cardiomyocytes throughout the heart, but was highly and uniformly expressed in cardiac fibroblasts and vascular smooth muscle cells. We also generated germline null Luma mice and discovered that germline null mutants were viable and exhibited normal cardiac function. Luma null mice also responded normally to pressure overload induced by transverse aortic constriction. In addition, localization and expression of other LINC complex components in both cardiac myocytes and fibroblasts was unaffected by global loss of Luma. Furthermore, we also generated and characterized Luma S358L knock-in mice, which displayed normal cardiac function and morphology. CONCLUSION Our data suggest that Luma is dispensable for murine cardiac development and function and that the Luma S358L mutation alone may not cause cardiomyopathy in mice.
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MESH Headings
- Animals
- Arrhythmogenic Right Ventricular Dysplasia/genetics
- Arrhythmogenic Right Ventricular Dysplasia/metabolism
- Cells, Cultured
- Cytoskeleton/metabolism
- Female
- Fibroblasts/metabolism
- Gene Expression Regulation, Developmental
- Genetic Predisposition to Disease
- Heart/embryology
- Heart/physiopathology
- Humans
- Hypertrophy, Left Ventricular/genetics
- Hypertrophy, Left Ventricular/metabolism
- Hypertrophy, Left Ventricular/physiopathology
- Male
- Mechanotransduction, Cellular
- Membrane Proteins/genetics
- Membrane Proteins/metabolism
- Mice, Inbred C57BL
- Mice, Knockout
- Morphogenesis
- Myocardium/metabolism
- Myocardium/pathology
- Myocytes, Cardiac/metabolism
- Myocytes, Smooth Muscle/metabolism
- Nuclear Matrix/metabolism
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Affiliation(s)
- Matthew J Stroud
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Xi Fang
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Jianlin Zhang
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Nuno Guimarães-Camboa
- Department of Pharmacology, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Jennifer Veevers
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Nancy D Dalton
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Yusu Gu
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - William H Bradford
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Kirk L Peterson
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Sylvia M Evans
- Department of Pharmacology, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Larry Gerace
- Department of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Ju Chen
- Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
- Corresponding author. Tel: 858 822 4276; fax: 858 822 3027, E-mail:
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Nesprin-1/2: roles in nuclear envelope organisation, myogenesis and muscle disease. Biochem Soc Trans 2018; 46:311-320. [PMID: 29487227 DOI: 10.1042/bst20170149] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 01/12/2018] [Accepted: 01/17/2018] [Indexed: 02/05/2023]
Abstract
Nesprins (nuclear envelope spectrin repeat proteins) are multi-isomeric scaffolding proteins. Nesprin-1 and -2 are highly expressed in skeletal and cardiac muscles and together with SUN (Sad1p/UNC84) domain-containing proteins form the LInker of Nucleoskeleton and Cytoskeleton (LINC) complex at the nuclear envelope in association with lamin A/C and emerin. Mutations in nesprin-1/2 have been found in patients with autosomal dominant Emery-Dreifuss muscular dystrophy (EDMD) as well as dilated cardiomyopathy (DCM). Several lines of evidence indicate that compromised LINC complex function is the critical step leading to muscle disease. Here, we review recent advances in our understanding of the functions of nesprin-1/2 in the LINC complex and mechanistic insights into how mutations in nesprin-1/2 lead to nesprin-related muscle diseases, in particular DCM and EDMD.
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50
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Next-Generation Sequencing and Mutational Analysis: Implications for Genes Encoding LINC Complex Proteins. Methods Mol Biol 2018; 1840:321-336. [PMID: 30141054 DOI: 10.1007/978-1-4939-8691-0_22] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Targeted panel, whole exome, or whole genome DNA sequencing using next-generation sequencing (NGS) allows for extensive high-throughput investigation of molecular machines/systems such as the LINC complex. This includes the identification of genetic variants in humans that cause disease, as is the case for some genes encoding LINC complex proteins. The relatively low cost and high speed of the sequencing process results in large datasets at various stages of analysis and interpretation. For those not intimately familiar with the process, interpretation of the data might prove challenging. This review lays out the most important and most commonly used materials and methods of NGS. It also discusses data analysis and potential pitfalls one might encounter because of peculiarities of the laboratory methodology or data analysis pipelines.
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