1
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Alraies Z, Rivera CA, Delgado MG, Sanséau D, Maurin M, Amadio R, Maria Piperno G, Dunsmore G, Yatim A, Lacerda Mariano L, Kniazeva A, Calmettes V, Sáez PJ, Williart A, Popard H, Gratia M, Lamiable O, Moreau A, Fusilier Z, Crestey L, Albaud B, Legoix P, Dejean AS, Le Dorze AL, Nakano H, Cook DN, Lawrence T, Manel N, Benvenuti F, Ginhoux F, Moreau HD, P F Nader G, Piel M, Lennon-Duménil AM. Cell shape sensing licenses dendritic cells for homeostatic migration to lymph nodes. Nat Immunol 2024; 25:1193-1206. [PMID: 38834865 PMCID: PMC11224020 DOI: 10.1038/s41590-024-01856-3] [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: 03/13/2023] [Accepted: 04/25/2024] [Indexed: 06/06/2024]
Abstract
Immune cells experience large cell shape changes during environmental patrolling because of the physical constraints that they encounter while migrating through tissues. These cells can adapt to such deformation events using dedicated shape-sensing pathways. However, how shape sensing affects immune cell function is mostly unknown. Here, we identify a shape-sensing mechanism that increases the expression of the chemokine receptor CCR7 and guides dendritic cell migration from peripheral tissues to lymph nodes at steady state. This mechanism relies on the lipid metabolism enzyme cPLA2, requires nuclear envelope tensioning and is finely tuned by the ARP2/3 actin nucleation complex. We also show that this shape-sensing axis reprograms dendritic cell transcription by activating an IKKβ-NF-κB-dependent pathway known to control their tolerogenic potential. These results indicate that cell shape changes experienced by immune cells can define their migratory behavior and immunoregulatory properties and reveal a contribution of the physical properties of tissues to adaptive immunity.
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Affiliation(s)
- Zahraa Alraies
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | - Claudia A Rivera
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | | | - Doriane Sanséau
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | - Mathieu Maurin
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | - Roberto Amadio
- Cellular Immunology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Giulia Maria Piperno
- Cellular Immunology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Garett Dunsmore
- INSERM U1015, Gustave Roussy Cancer Campus, Villejuif, France
| | - Aline Yatim
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | | | - Anna Kniazeva
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | - Vincent Calmettes
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | - Pablo J Sáez
- Cell Communication and Migration Laboratory, Institute of Biochemistry and Molecular Cell Biology, Center for Experimental Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alice Williart
- CNRS UMR144, Institut Curie, PSL Research University, Paris, France
| | - Henri Popard
- CNRS UMR144, Institut Curie, PSL Research University, Paris, France
| | - Matthieu Gratia
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | | | - Aurélie Moreau
- Center for Research in Transplantation and Translational Immunology, UMR 1064, INSERM, Nantes Université, Nantes, France
| | - Zoé Fusilier
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
- INSERM U932, Immunity and Cancer, Institut Curie, Paris-Cité University, Paris, France
| | - Lou Crestey
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | | | - Patricia Legoix
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | - Anne S Dejean
- INSERM UMR1291, CNRS UMR5051, Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITy), Université Toulouse III, Toulouse, France
| | - Anne-Louise Le Dorze
- INSERM UMR1291, CNRS UMR5051, Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITy), Université Toulouse III, Toulouse, France
| | - Hideki Nakano
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health (NIH), Research Triangle Park, NC, USA
| | - Donald N Cook
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health (NIH), Research Triangle Park, NC, USA
| | - Toby Lawrence
- Centre d'Immunologie de Marseille-Luminy, INSERM, CNRS, Université Aix-Marseille, Marseille, France
- Centre for Inflammation Biology and Cancer Immunology, School of Immunology and Microbial Sciences, King's College London, London, UK
- Henan Key Laboratory of Immunology and Targeted Therapy, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Nicolas Manel
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | - Federica Benvenuti
- Cellular Immunology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Florent Ginhoux
- INSERM U1015, Gustave Roussy Cancer Campus, Villejuif, France
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Immunos, Singapore, Singapore
- Department of Immunology and Microbiology, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Translational Immunology Institute, SingHealth Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Hélène D Moreau
- INSERM U932, Immunity and Cancer, Institut Curie, PSL University, Paris, France
| | - Guilherme P F Nader
- CNRS UMR144, Institut Curie, PSL Research University, Paris, France
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia and University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Matthieu Piel
- CNRS UMR144, Institut Curie, PSL Research University, Paris, France.
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2
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En A, Bogireddi H, Thomas B, Stutzman AV, Ikegami S, LaForest B, Almakki O, Pytel P, Moskowitz IP, Ikegami K. Pervasive nuclear envelope ruptures precede ECM signaling and disease onset without activating cGAS-STING in Lamin-cardiomyopathy mice. Cell Rep 2024; 43:114284. [PMID: 38814785 PMCID: PMC11290591 DOI: 10.1016/j.celrep.2024.114284] [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: 10/03/2023] [Revised: 04/14/2024] [Accepted: 05/13/2024] [Indexed: 06/01/2024] Open
Abstract
Nuclear envelope (NE) ruptures are emerging observations in Lamin-related dilated cardiomyopathy, an adult-onset disease caused by loss-of-function mutations in Lamin A/C, a nuclear lamina component. Here, we test a prevailing hypothesis that NE ruptures trigger the pathological cGAS-STING cytosolic DNA-sensing pathway using a mouse model of Lamin cardiomyopathy. The reduction of Lamin A/C in cardio-myocyte of adult mice causes pervasive NE ruptures in cardiomyocytes, preceding inflammatory transcription, fibrosis, and fatal dilated cardiomyopathy. NE ruptures are followed by DNA damage accumulation without causing immediate cardiomyocyte death. However, cGAS-STING-dependent inflammatory signaling remains inactive. Deleting cGas or Sting does not rescue cardiomyopathy in the mouse model. The lack of cGAS-STING activation is likely due to the near absence of cGAS expression in adult cardiomyocytes at baseline. Instead, extracellular matrix (ECM) signaling is activated and predicted to initiate pro-inflammatory communication from Lamin-reduced cardiomyocytes to fibroblasts. Our work nominates ECM signaling, not cGAS-STING, as a potential inflammatory contributor in Lamin cardiomyopathy.
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Affiliation(s)
- Atsuki En
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Graduate School of Nanobioscience, Yokohama City University, Yokohama, Kanagawa 236-0027, Japan
| | - Hanumakumar Bogireddi
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Briana Thomas
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Alexis V Stutzman
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA
| | - Sachie Ikegami
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA
| | - Brigitte LaForest
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA
| | - Omar Almakki
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA
| | - Peter Pytel
- Department of Pathology, the University of Chicago, Chicago, IL 60637, USA
| | - Ivan P Moskowitz
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA; Department of Pathology, the University of Chicago, Chicago, IL 60637, USA; Department of Human Genetics, the University of Chicago, Chicago, IL 60637, USA
| | - Kohta Ikegami
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.
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3
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Zuela-Sopilniak N, Morival J, Lammerding J. Multi-level transcriptomic analysis of LMNA -related dilated cardiomyopathy identifies disease-driving processes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.11.598511. [PMID: 38915720 PMCID: PMC11195185 DOI: 10.1101/2024.06.11.598511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
LMNA- related dilated cardiomyopathy ( LMNA -DCM) is one of the most severe forms of DCM. The incomplete understanding of the molecular disease mechanisms results in lacking treatment options, leading to high mortality amongst patients. Here, using an inducible, cardiomyocyte-specific lamin A/C depletion mouse model, we conducted a comprehensive transcriptomic study, combining both bulk and single nucleus RNA sequencing, and spanning LMNA -DCM disease progression, to identify potential disease drivers. Our refined analysis pipeline identified 496 genes already misregulated early in disease. The expression of these genes was largely driven by disease specific cardiomyocyte sub-populations and involved biological processes mediating cellular response to DNA damage, cytosolic pattern recognition, and innate immunity. Indeed, DNA damage in LMNA -DCM hearts was significantly increased early in disease and correlated with reduced cardiomyocyte lamin A levels. Activation of cytosolic pattern recognition in cardiomyocytes was independent of cGAS, which is rarely expressed in cardiomyocytes, but likely occurred downstream of other pattern recognition sensors such as IFI16. Altered gene expression in cardiac fibroblasts and immune cell infiltration further contributed to tissue-wide changes in gene expression. Our transcriptomic analysis further predicted significant alterations in cell-cell communication between cardiomyocytes, fibroblasts, and immune cells, mediated through early changes in the extracellular matrix (ECM) in the LMNA -DCM hearts. Taken together, our work suggests a model in which nuclear damage in cardiomyocytes leads to activation of DNA damage responses, cytosolic pattern recognition pathway, and other signaling pathways that activate inflammation, immune cell recruitment, and transcriptional changes in cardiac fibroblasts, which collectively drive LMNA -DCM pathogenesis.
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4
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Sikder K, Phillips E, Zhong Z, Wang N, Saunders J, Mothy D, Kossenkov A, Schneider T, Nichtova Z, Csordas G, Margulies KB, Choi JC. Perinuclear damage from nuclear envelope deterioration elicits stress responses that contribute to LMNA cardiomyopathy. SCIENCE ADVANCES 2024; 10:eadh0798. [PMID: 38718107 PMCID: PMC11078192 DOI: 10.1126/sciadv.adh0798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/03/2024] [Indexed: 05/12/2024]
Abstract
Mutations in the LMNA gene encoding lamins A/C cause an array of tissue-selective diseases, with the heart being the most commonly affected organ. Despite progress in understanding the perturbations emanating from LMNA mutations, an integrative understanding of the pathogenesis underlying cardiac dysfunction remains elusive. Using a novel conditional deletion model capable of translatome profiling, we observed that cardiomyocyte-specific Lmna deletion in adult mice led to rapid cardiomyopathy with pathological remodeling. Before cardiac dysfunction, Lmna-deleted cardiomyocytes displayed nuclear abnormalities, Golgi dilation/fragmentation, and CREB3-mediated stress activation. Translatome profiling identified MED25 activation, a transcriptional cofactor that regulates Golgi stress. Autophagy is disrupted in the hearts of these mice, which can be recapitulated by disrupting the Golgi. Systemic administration of modulators of autophagy or ER stress significantly delayed cardiac dysfunction and prolonged survival. These studies support a hypothesis wherein stress responses emanating from the perinuclear space contribute to the LMNA cardiomyopathy development.
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Affiliation(s)
- Kunal Sikder
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Elizabeth Phillips
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Zhijiu Zhong
- Translational Research and Pathology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Nadan Wang
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Jasmine Saunders
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - David Mothy
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Andrew Kossenkov
- Bioinformatics Facility, The Wistar Institute Cancer Center, Philadelphia, PA, USA
| | - Timothy Schneider
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Zuzana Nichtova
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Gyorgy Csordas
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Kenneth B. Margulies
- Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jason C. Choi
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
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5
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En A, Bogireddi H, Thomas B, Stutzman A, Ikegami S, LaForest B, Almakki O, Pytel P, Moskowitz IP, Ikegami K. Pervasive nuclear envelope ruptures precede ECM signaling and disease onset without activating cGAS-STING in Lamin-cardiomyopathy mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.08.28.555134. [PMID: 37693381 PMCID: PMC10491116 DOI: 10.1101/2023.08.28.555134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Nuclear envelope (NE) ruptures are emerging observations in Lamin-related dilated cardiomyopathy, an adult-onset disease caused by loss-of-function mutations in Lamin A/C, a nuclear lamina component. Here, we tested a prevailing hypothesis that NE ruptures trigger pathological cGAS-STING cytosolic DNA-sensing pathway, using a mouse model of Lamin-cardiomyopathy. Reduction of Lamin A/C in cardiomyocytes of adult mice caused pervasive NE ruptures in cardiomyocytes, preceding inflammatory transcription, fibrosis, and fatal dilated cardiomyopathy. NE ruptures were followed by DNA damage accumulation without causing immediate cardiomyocyte death. However, cGAS-STING-dependent inflammatory signaling remained inactive. Deleting cGas or Sting did not rescue cardiomyopathy. The lack of cGAS-STING activation was likely due to the near absence of cGAS expression in adult cardiomyocytes at baseline. Instead, extracellular matrix (ECM) signaling was activated and predicted to initiate pro-inflammatory communication from Lamin-reduced cardiomyocytes to fibroblasts. Our work nominates ECM signaling, not cGAS-STING, as a potential inflammatory contributor in Lamin-cardiomyopathy.
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Affiliation(s)
- Atsuki En
- Division of Molecular Cardvascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Graduate School of Nanobioscience, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Hanumakumar Bogireddi
- Division of Molecular Cardvascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Briana Thomas
- Division of Molecular Cardvascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Alexis Stutzman
- Department of Pediatrics, The University of Chicago, Chicago, IL, USA
| | - Sachie Ikegami
- Department of Pediatrics, The University of Chicago, Chicago, IL, USA
| | - Brigitte LaForest
- Department of Pediatrics, The University of Chicago, Chicago, IL, USA
| | - Omar Almakki
- Department of Pediatrics, The University of Chicago, Chicago, IL, USA
| | - Peter Pytel
- Department of Pathology, The University of Chicago, Chicago, IL, USA
| | - Ivan P Moskowitz
- Department of Pediatrics, The University of Chicago, Chicago, IL, USA
- Department of Pathology, The University of Chicago, Chicago, IL, USA
- Department of Human Genetics, The University of Chicago, Chicago, IL, USA
| | - Kohta Ikegami
- Division of Molecular Cardvascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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6
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De Silva NS, Siewiera J, Alkhoury C, Nader GPF, Nadalin F, de Azevedo K, Couty M, Izquierdo HM, Bhargava A, Conrad C, Maurin M, Antoniadou K, Fouillade C, Londono-Vallejo A, Behrendt R, Bertotti K, Serdjebi C, Lanthiez F, Gallwitz L, Saftig P, Herrero-Fernández B, Saez A, González-Granado JM, van Niel G, Boissonnas A, Piel M, Manel N. Nuclear envelope disruption triggers hallmarks of aging in lung alveolar macrophages. NATURE AGING 2023; 3:1251-1268. [PMID: 37723209 DOI: 10.1038/s43587-023-00488-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 08/16/2023] [Indexed: 09/20/2023]
Abstract
Aging is characterized by gradual immune dysfunction and increased disease risk. Genomic instability is considered central to the aging process, but the underlying mechanisms of DNA damage are insufficiently defined. Cells in confined environments experience forces applied to their nucleus, leading to transient nuclear envelope rupture (NER) and DNA damage. Here, we show that Lamin A/C protects lung alveolar macrophages (AMs) from NER and hallmarks of aging. AMs move within constricted spaces in the lung. Immune-specific ablation of lamin A/C results in selective depletion of AMs and heightened susceptibility to influenza virus-induced pathogenesis and lung cancer growth. Lamin A/C-deficient AMs that persist display constitutive NER marks, DNA damage and p53-dependent senescence. AMs from aged wild-type and from lamin A/C-deficient mice share a lysosomal signature comprising CD63. CD63 is required to limit damaged DNA in macrophages. We propose that NER-induced genomic instability represents a mechanism of aging in AMs.
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Affiliation(s)
| | - Johan Siewiera
- Institut Curie, PSL Research University, INSERM U932, Paris, France
| | - Chantal Alkhoury
- Institut Curie, PSL Research University, INSERM U932, Paris, France
| | | | | | - Kevin de Azevedo
- Institut Curie, PSL Research University, INSERM U932, Paris, France
| | - Mickaël Couty
- Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Team van Niel, Paris, France
| | | | - Anvita Bhargava
- Institut Curie, PSL Research University, INSERM U932, Paris, France
| | - Cécile Conrad
- Institut Curie, PSL Research University, INSERM U932, Paris, France
| | - Mathieu Maurin
- Institut Curie, PSL Research University, INSERM U932, Paris, France
| | | | - Charles Fouillade
- Institut Curie, PSL Research University, Université Paris-Saclay, CNRS, INSERM, UMR3347, U1021, Orsay, France
| | | | - Rayk Behrendt
- Institute for Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany
| | | | | | - François Lanthiez
- Sorbonne Université, Inserm, CNRS, Centre d'Immunologie et des Maladies Infectieuses, Cimi-Paris, Paris, France
| | - Lisa Gallwitz
- Biochemical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Paul Saftig
- Biochemical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Beatriz Herrero-Fernández
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Angela Saez
- Facultad de Ciencias Experimentales, Universidad Francisco de Vitoria (UFV), Pozuelo de Alarcón, Spain
| | - José María González-Granado
- LamImSys Lab, Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12). Department of Immunology, Ophthalmology and ENT, School of Medicine, Universidad Complutense de Madrid. CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Guillaume van Niel
- Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Team van Niel, Paris, France
| | - Alexandre Boissonnas
- Sorbonne Université, Inserm, CNRS, Centre d'Immunologie et des Maladies Infectieuses, Cimi-Paris, Paris, France
| | - Matthieu Piel
- Institut Curie, PSL Research University, CNRS UMR144, Paris, France
| | - Nicolas Manel
- Institut Curie, PSL Research University, INSERM U932, Paris, France.
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7
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Landeros A, Wallace DA, Rahi A, Magdongon CB, Suraneni P, Amin MA, Chakraborty M, Adam SA, Foltz DR, Varma D. Nuclear lamin A-associated proteins are required for centromere assembly. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.25.559341. [PMID: 37808683 PMCID: PMC10557622 DOI: 10.1101/2023.09.25.559341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Many Lamin A-associated proteins (LAAP's) that are key constituents of the nuclear envelope (NE), assemble at the "core" domains of chromosomes during NE reformation and mitotic exit. However, the identity and function of the chromosomal core domains remain ill-defined. Here, we show that a distinct section of the core domain overlaps with the centromeres/kinetochores of chromosomes during mitotic telophase. The core domain can thus be demarcated into a kinetochore proximal core (KPC) on one side of the segregated chromosomes and the kinetochore distal core (KDC) on the opposite side, close to the central spindle. We next tested if centromere assembly is connected to NE re-formation. We find that centromere assembly is markedly perturbed after inhibiting the function of LMNA and the core-localized LAAPs, BANF1 and Emerin. We also find that the LAAPs exhibit multiple biochemical interactions with the centromere and inner kinetochore proteins. Consistent with this, normal mitotic progression and chromosome segregation was severely impeded after inhibiting LAAP function. Intriguingly, the inhibition of centromere function also interferes with the assembly of LAAP components at the core domain, suggesting a mutual dependence of LAAP and centromeres for their assembly at the core domains. Finally, we find that the localization of key proteins involved in the centromeric loading of CENP-A, including the Mis18 complex and HJURP were markedly affected in LAAP-inhibited cells. Our evidence points to a model where LAAP assembly at the core domain serves a key function in loading new copies of centromeric proteins during or immediately after mitotic exit.
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Affiliation(s)
- Adriana Landeros
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Destiny A. Wallace
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Amit Rahi
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Christine B. Magdongon
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Praveen Suraneni
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Mohammed A. Amin
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Manas Chakraborty
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Stephen A. Adam
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Daniel R. Foltz
- Dept. of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
| | - Dileep Varma
- Dept. of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave Chicago, IL 60611
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8
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Del Monte-Monge A, Ruiz-Polo de Lara Í, Gonzalo P, Espinós-Estévez C, González-Amor M, de la Fuente-Pérez M, Andrés-Manzano MJ, Fanjul V, Gimeno JR, Barriales-Villa R, Dorado B, Andrés V. Lamin A/C Ablation Restricted to Vascular Smooth Muscle Cells, Cardiomyocytes, and Cardiac Fibroblasts Causes Cardiac and Vascular Dysfunction. Int J Mol Sci 2023; 24:11172. [PMID: 37446344 DOI: 10.3390/ijms241311172] [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: 06/16/2023] [Revised: 06/29/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
Mutations in the LMNA gene (encoding lamin A/C proteins) cause several human cardiac diseases, including dilated cardiomyopathies (LMNA-DCM). The main clinical risks in LMNA-DCM patients are sudden cardiac death and progressive left ventricular ejection fraction deterioration, and therefore most human and animal studies have sought to define the mechanisms through which LMNA mutations provoke cardiac alterations, with a particular focus on cardiomyocytes. To investigate if LMNA mutations also cause vascular alterations that might contribute to the etiopathogenesis of LMNA-DCM, we generated and characterized Lmnaflox/floxSM22αCre mice, which constitutively lack lamin A/C in vascular smooth muscle cells (VSMCs), cardiac fibroblasts, and cardiomyocytes. Like mice with whole body or cardiomyocyte-specific lamin A/C ablation, Lmnaflox/floxSM22αCre mice recapitulated the main hallmarks of human LMNA-DCM, including ventricular systolic dysfunction, cardiac conduction defects, cardiac fibrosis, and premature death. These alterations were associated with elevated expression of total and phosphorylated (active) Smad3 and cleaved (active) caspase 3 in the heart. Lmnaflox/floxSM22αCre mice also exhibited perivascular fibrosis in the coronary arteries and a switch of aortic VSMCs from the 'contractile' to the 'synthetic' phenotype. Ex vivo wire myography in isolated aortic rings revealed impaired maximum contraction capacity and an altered response to vasoconstrictor and vasodilator agents in Lmnaflox/floxSM22αCre mice. To our knowledge, our results provide the first evidence of phenotypic alterations in VSMCs that might contribute significantly to the pathophysiology of some forms of LMNA-DCM. Future work addressing the mechanisms underlying vascular defects in LMNA-DCM may open new therapeutic avenues for these diseases.
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Affiliation(s)
- Alberto Del Monte-Monge
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Íñigo Ruiz-Polo de Lara
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
| | - Pilar Gonzalo
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Carla Espinós-Estévez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - María González-Amor
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Miguel de la Fuente-Pérez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
| | - María J Andrés-Manzano
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Víctor Fanjul
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Juan R Gimeno
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Cardiac Department, Hospital Clínico Universitario Virgen Arrixaca, 30120 Murcia, Spain
| | - Roberto Barriales-Villa
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Unidad de Cardiopatías Familiares, Complexo Hospitalario Universitario A Coruña (INIBIC-CHUAC), 15006 A Coruña, Spain
| | - Beatriz Dorado
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Vicente Andrés
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
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9
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Sikder K, Phillips E, Zhong Z, Wang N, Saunders J, Mothy D, Kossenkov A, Schneider T, Nichtova Z, Csordas G, Margulies KB, Choi JC. Perinuclear damage from nuclear envelope deterioration elicits stress responses that contribute to LMNA cardiomyopathy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.14.528563. [PMID: 36824975 PMCID: PMC9949050 DOI: 10.1101/2023.02.14.528563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Mutations in the LMNA gene encoding nuclear lamins A/C cause a diverse array of tissue-selective diseases, with the heart being the most commonly affected organ. Despite progress in understanding the molecular perturbations emanating from LMNA mutations, an integrative understanding of the pathogenesis leading to cardiac dysfunction remains elusive. Using a novel cell-type specific Lmna deletion mouse model capable of translatome profiling, we found that cardiomyocyte-specific Lmna deletion in adult mice led to rapid cardiomyopathy with pathological remodeling. Prior to the onset of cardiac dysfunction, lamin A/C-depleted cardiomyocytes displayed nuclear envelope deterioration, golgi dilation/fragmentation, and CREB3-mediated golgi stress activation. Translatome profiling identified upregulation of Med25, a transcriptional co-factor that can selectively dampen UPR axes. Autophagy is disrupted in the hearts of these mice, which can be recapitulated by disrupting the golgi or inducing nuclear damage by increased matrix stiffness. Systemic administration of pharmacological modulators of autophagy or ER stress significantly improved the cardiac function. These studies support a hypothesis wherein stress responses emanating from the perinuclear space contribute to the development of LMNA cardiomyopathy. Teaser Interplay of stress responses underlying the development of LMNA cardiomyopathy.
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10
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Saunders J, Sikder K, Phillips E, Ishwar A, Mothy D, Margulies KB, Choi JC. Med25 Limits Master Regulators That Govern Adipogenesis. Int J Mol Sci 2023; 24:6155. [PMID: 37047128 PMCID: PMC10093881 DOI: 10.3390/ijms24076155] [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: 02/20/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 04/14/2023] Open
Abstract
Mediator 25 (Med25) is a member of the mediator complex that relays signals from transcription factors to the RNA polymerase II machinery. Multiple transcription factors, particularly those involved in lipid metabolism, utilize the mediator complex, but how Med25 is involved in this context is unclear. We previously identified Med25 in a translatome screen of adult cardiomyocytes (CMs) in a novel cell type-specific model of LMNA cardiomyopathy. In this study, we show that Med25 upregulation is coincident with myocardial lipid accumulation. To ascertain the role of Med25 in lipid accumulation, we utilized iPSC-derived and neonatal CMs to recapitulate the in vivo phenotype by depleting lamins A and C (lamin A/C) in vitro. Although lamin A/C depletion elicits lipid accumulation, this effect appears to be mediated by divergent mechanisms dependent on the CM developmental state. To directly investigate Med25 in lipid accumulation, we induced adipogenesis in Med25-silenced 3T3-L1 preadipocytes and detected enhanced lipid accumulation. Assessment of pertinent mediators driving adipogenesis revealed that C/EBPα and PPARγ are super-induced by Med25 silencing. Our results indicate that Med25 limits adipogenic potential by suppressing the levels of master regulators that govern adipogenesis. Furthermore, we caution the use of early-developmental-stage cardiomyocytes to model adult-stage cells, particularly for dissecting metabolic perturbations emanating from LMNA mutations.
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Affiliation(s)
- Jasmine Saunders
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Kunal Sikder
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Elizabeth Phillips
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Anurag Ishwar
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - David Mothy
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Kenneth B. Margulies
- Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jason C. Choi
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
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11
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Wang Y, Dobreva G. Epigenetics in LMNA-Related Cardiomyopathy. Cells 2023; 12:cells12050783. [PMID: 36899919 PMCID: PMC10001118 DOI: 10.3390/cells12050783] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/18/2023] [Accepted: 02/26/2023] [Indexed: 03/06/2023] Open
Abstract
Mutations in the gene for lamin A/C (LMNA) cause a diverse range of diseases known as laminopathies. LMNA-related cardiomyopathy is a common inherited heart disease and is highly penetrant with a poor prognosis. In the past years, numerous investigations using mouse models, stem cell technologies, and patient samples have characterized the phenotypic diversity caused by specific LMNA variants and contributed to understanding the molecular mechanisms underlying the pathogenesis of heart disease. As a component of the nuclear envelope, LMNA regulates nuclear mechanostability and function, chromatin organization, and gene transcription. This review will focus on the different cardiomyopathies caused by LMNA mutations, address the role of LMNA in chromatin organization and gene regulation, and discuss how these processes go awry in heart disease.
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Affiliation(s)
- Yinuo Wang
- Department of Cardiovascular Genomics and Epigenomics, European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany
- German Centre for Cardiovascular Research (DZHK), 68167 Mannheim, Germany
- Correspondence: (Y.W.); (G.D.)
| | - Gergana Dobreva
- Department of Cardiovascular Genomics and Epigenomics, European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany
- German Centre for Cardiovascular Research (DZHK), 68167 Mannheim, Germany
- Correspondence: (Y.W.); (G.D.)
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12
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Kono Y, Adam SA, Sato Y, Reddy KL, Zheng Y, Medalia O, Goldman RD, Kimura H, Shimi T. Nucleoplasmic lamin C rapidly accumulates at sites of nuclear envelope rupture with BAF and cGAS. J Cell Biol 2022; 221:213616. [PMID: 36301259 PMCID: PMC9617480 DOI: 10.1083/jcb.202201024] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 07/14/2022] [Accepted: 09/06/2022] [Indexed: 12/13/2022] Open
Abstract
In mammalian cell nuclei, the nuclear lamina (NL) underlies the nuclear envelope (NE) to maintain nuclear structure. The nuclear lamins, the major structural components of the NL, are involved in the protection against NE rupture induced by mechanical stress. However, the specific role of the lamins in repair of NE ruptures has not been fully determined. Our analyses using immunofluorescence and live-cell imaging revealed that the nucleoplasmic pool of lamin C rapidly accumulated at sites of NE rupture induced by laser microirradiation in mouse embryonic fibroblasts. The accumulation of lamin C at the rupture sites required both the immunoglobulin-like fold domain that binds to barrier-to-autointegration factor (BAF) and a nuclear localization signal. The accumulation of nuclear BAF and cytoplasmic cyclic GMP-AMP synthase (cGAS) at the rupture sites was in part dependent on lamin A/C. These results suggest that nucleoplasmic lamin C, BAF, and cGAS concertedly accumulate at sites of NE rupture for rapid repair.
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Affiliation(s)
- Yohei Kono
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Stephen A Adam
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Yuko Sato
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan.,School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan
| | - Karen L Reddy
- Department of Biological Chemistry, Johns Hopkins University, Baltimore, MD
| | - Yixian Zheng
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD
| | - Ohad Medalia
- Department of Biochemistry, University of Zurich, Zurich, Switzerland
| | - Robert D Goldman
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Hiroshi Kimura
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan.,School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan.,World Research Hub Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Takeshi Shimi
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan.,World Research Hub Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
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13
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Lamin A/C-dependent chromatin architecture safeguards naïve pluripotency to prevent aberrant cardiovascular cell fate and function. Nat Commun 2022; 13:6663. [PMID: 36333314 PMCID: PMC9636150 DOI: 10.1038/s41467-022-34366-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022] Open
Abstract
Tight control of cell fate choices is crucial for normal development. Here we show that lamin A/C plays a key role in chromatin organization in embryonic stem cells (ESCs), which safeguards naïve pluripotency and ensures proper cell fate choices during cardiogenesis. We report changes in chromatin compaction and localization of cardiac genes in Lmna-/- ESCs resulting in precocious activation of a transcriptional program promoting cardiomyocyte versus endothelial cell fate. This is accompanied by premature cardiomyocyte differentiation, cell cycle withdrawal and abnormal contractility. Gata4 is activated by lamin A/C loss and Gata4 silencing or haploinsufficiency rescues the aberrant cardiovascular cell fate choices induced by lamin A/C deficiency. We uncover divergent functions of lamin A/C in naïve pluripotent stem cells and cardiomyocytes, which have distinct contributions to the transcriptional alterations of patients with LMNA-associated cardiomyopathy. We conclude that disruption of lamin A/C-dependent chromatin architecture in ESCs is a primary event in LMNA loss-of-function cardiomyopathy.
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14
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Cheedipudi SM, Asghar S, Marian AJ. Genetic Ablation of the DNA Damage Response Pathway Attenuates Lamin-Associated Dilated Cardiomyopathy in Mice. JACC Basic Transl Sci 2022; 7:1232-1245. [PMID: 36644279 PMCID: PMC9831927 DOI: 10.1016/j.jacbts.2022.06.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 06/17/2022] [Accepted: 06/18/2022] [Indexed: 11/07/2022]
Abstract
Hereditary dilated cardiomyopathy (DCM) is a primary disease of cardiac myocytes caused by mutations in genes encoding proteins with a diverse array of functions. Mutations in the LMNA gene, encoding the nuclear envelope protein lamin A/C, are the second most common causes of DCM. The phenotype is characterized by progressive cardiac dysfunction, leading to refractory heart failure, myocardial fibrosis, cardiac arrhythmias, and sudden cardiac death. The molecular pathogenesis of DCM caused by the LMNA mutations is not well known. The LMNA protein is involved in nuclear membrane stability. It is also a guardian of the genome involved in the processing of the topoisomerases at the transcriptionally active domain and the repair of double-stranded DNA breaks (DSBs). Deletion of the mouse Lmna gene in cardiac myocytes leads to premature death, DCM, myocardial fibrosis, and apoptosis. The phenotype is associated with increased expression of the cytosolic DNA sensor cyclic GMP-AMP synthase (CGAS) and activation of the DNA damage response (DDR) pathway. Genetic blockade of the DDR pathway, upon knockout of the Mb21d1 gene encoding CGAS, prolonged survival, improved cardiac function, partially restored levels of molecular markers of heart failure, and attenuated myocardial apoptosis and fibrosis in the LMNA-deficient mice. The findings indicate that targeting the CGAS/DDR pathway might be beneficial in the treatment of DCM caused by mutations in the LMNA gene.
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Affiliation(s)
| | | | - Ali J. Marian
- Address for correspondence: Dr Ali J. Marian, Center for Cardiovascular Genetics, 6770 Bertner Street, Suite C900A, Houston, Texas 77030, USA.
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15
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Östlund C, Hernandez-Ono A, Turk SJ, Dauer WT, Ginsberg HN, Worman HJ, Shin JY. Hepatocytes Deficient in Nuclear Envelope Protein Lamina-associated Polypeptide 1 are an Ideal Mammalian System to Study Intranuclear Lipid Droplets. J Lipid Res 2022; 63:100277. [PMID: 36100089 PMCID: PMC9587410 DOI: 10.1016/j.jlr.2022.100277] [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: 12/23/2021] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 01/21/2023] Open
Abstract
Lipid droplets (LDs) are generally considered to be synthesized in the ER and utilized in the cytoplasm. However, LDs have been observed inside nuclei in some cells, although recent research on nuclear LDs has focused on cultured cell lines. To better understand nuclear LDs that occur in vivo, here we examined LDs in primary hepatocytes from mice following depletion of the nuclear envelope protein lamina-associated polypeptide 1 (LAP1). Microscopic image analysis showed that LAP1-depleted hepatocytes contain frequent nuclear LDs, which differ from cytoplasmic LDs in their associated proteins. We found type 1 nucleoplasmic reticula, which are invaginations of the inner nuclear membrane, are often associated with nuclear LDs in these hepatocytes. Furthermore, in vivo depletion of the nuclear envelope proteins lamin A and C from mouse hepatocytes led to severely abnormal nuclear morphology, but significantly fewer nuclear LDs than were observed upon depletion of LAP1. In addition, we show both high-fat diet feeding and fasting of mice increased cytoplasmic lipids in LAP1-depleted hepatocytes but reduced nuclear LDs, demonstrating a relationship of LD formation with nutritional state. Finally, depletion of microsomal triglyceride transfer protein did not change the frequency of nuclear LDs in LAP1-depleted hepatocytes, suggesting that it is not required for the biogenesis of nuclear LDs in these cells. Together, these data show that LAP1-depleted hepatocytes represent an ideal mammalian system to investigate the biogenesis of nuclear LDs and their partitioning between the nucleus and cytoplasm in response to changes in nutritional state and cellular metabolism in vivo.
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Affiliation(s)
- Cecilia Östlund
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA,Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Antonio Hernandez-Ono
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Samantha J. Turk
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA,Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - William T. Dauer
- Peter O’Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA,Department of Neurology, University of Texas Southwestern Medical Center, Dallas, TX, USA,Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Henry N. Ginsberg
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Howard J. Worman
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA,Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Ji-Yeon Shin
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA,For correspondence: Ji-Yeon Shin
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16
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Katiyar A, Zhang J, Antani JD, Yu Y, Scott KL, Lele PP, Reinhart‐King CA, Sniadecki NJ, Roux KJ, Dickinson RB, Lele TP. The Nucleus Bypasses Obstacles by Deforming Like a Drop with Surface Tension Mediated by Lamin A/C. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201248. [PMID: 35712768 PMCID: PMC9376816 DOI: 10.1002/advs.202201248] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/20/2022] [Indexed: 06/15/2023]
Abstract
Migrating cells must deform their stiff cell nucleus to move through pores and fibers in tissue. Lamin A/C is known to hinder cell migration by limiting nuclear deformation and passage through confining channels, but its role in nuclear deformation and passage through fibrous environments is less clear. Cell and nuclear migration through discrete, closely spaced, slender obstacles which mimic the mechanical properties of collagen fibers are studied. Nuclei bypass slender obstacles while preserving their overall morphology by deforming around them with deep local invaginations of little resisting force. The obstacles do not impede the nuclear trajectory and do not cause rupture of the nuclear envelope. Nuclei likewise deform around single collagen fibers in cells migrating in 3D collagen gels. In contrast to its limiting role in nuclear passage through confining channels, lamin A/C facilitates nuclear deformation and passage through fibrous environments; nuclei in lamin-null (Lmna-/- ) cells lose their overall morphology and become entangled on the obstacles. Analogous to surface tension-mediated deformation of a liquid drop, lamin A/C imparts a surface tension on the nucleus that allows nuclear invaginations with little mechanical resistance, preventing nuclear entanglement and allowing nuclear passage through fibrous environments.
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Affiliation(s)
- Aditya Katiyar
- Department of Biomedical EngineeringTexas A&M University101 Bizzell St.College StationTX77843USA
| | - Jian Zhang
- Department of Biomedical EngineeringVanderbilt University2301 Vanderbilt PlaceNashvilleTN37235USA
| | - Jyot D. Antani
- Artie McFerrin Department of Chemical EngineeringTexas A&M University3122 TAMUCollege StationTX77843USA
| | - Yifan Yu
- Department of Chemical EngineeringUniversity of Florida1030 Center DriveGainesvilleFL32611USA
| | - Kelsey L. Scott
- Enabling Technologies GroupSanford Research2301 East 60th St NSioux FallsSD57104USA
| | - Pushkar P. Lele
- Artie McFerrin Department of Chemical EngineeringTexas A&M University3122 TAMUCollege StationTX77843USA
| | - Cynthia A. Reinhart‐King
- Department of Biomedical EngineeringVanderbilt University2301 Vanderbilt PlaceNashvilleTN37235USA
| | - Nathan J. Sniadecki
- Department of Mechanical EngineeringDepartment of Lab Medicine and PathologyInstitute for Stem Cell and Regenerative MedicineCenter for Cardiac BiologyUniversity of WashingtonStevens Way, Box 352600SeattleWA98195USA
| | - Kyle J. Roux
- Enabling Technologies GroupSanford Research2301 East 60th St NSioux FallsSD57104USA
- Department of PediatricsSanford School of MedicineUniversity of South Dakota414 E Clark StVermillionSD57069USA
| | - Richard B. Dickinson
- Department of Chemical EngineeringUniversity of Florida1030 Center DriveGainesvilleFL32611USA
| | - Tanmay P. Lele
- Department of Biomedical EngineeringTexas A&M University101 Bizzell St.College StationTX77843USA
- Artie McFerrin Department of Chemical EngineeringTexas A&M University3122 TAMUCollege StationTX77843USA
- Department of Translational Medical SciencesTexas A&M University2121 W Holcombe St.HoustonTX77030USA
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17
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Zheng M, Jin G, Zhou Z. Post-Translational Modification of Lamins: Mechanisms and Functions. Front Cell Dev Biol 2022; 10:864191. [PMID: 35656549 PMCID: PMC9152177 DOI: 10.3389/fcell.2022.864191] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/17/2022] [Indexed: 12/22/2022] Open
Abstract
Lamins are the ancient type V intermediate filament proteins contributing to diverse biological functions, such as the maintenance of nuclear morphology, stabilization of chromatin architecture, regulation of cell cycle progression, regulation of spatial-temporal gene expressions, and transduction of mechano-signaling. Deregulation of lamins is associated with abnormal nuclear morphology and chromatin disorganization, leading to a variety of diseases such as laminopathy and premature aging, and might also play a role in cancer. Accumulating evidence indicates that lamins are functionally regulated by post-translational modifications (PTMs) including farnesylation, phosphorylation, acetylation, SUMOylation, methylation, ubiquitination, and O-GlcNAcylation that affect protein stabilization and the association with chromatin or associated proteins. The mechanisms by which these PTMs are modified and the relevant functionality become increasingly appreciated as understanding of these changes provides new insights into the molecular mechanisms underlying the laminopathies concerned and novel strategies for the management. In this review, we discussed a range of lamin PTMs and their roles in both physiological and pathological processes, as well as potential therapeutic strategies by targeting lamin PTMs.
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Affiliation(s)
- Mingyue Zheng
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Guoxiang Jin
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zhongjun Zhou
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong SAR, China
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18
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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: 0] [Impact Index Per Article: 0] [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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19
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Tang Y, Zhu L, Cho JS, Li XY, Weiss SJ. Matrix remodeling controls a nuclear lamin A/C-emerin network that directs Wnt-regulated stem cell fate. Dev Cell 2022; 57:480-495.e6. [PMID: 35150612 PMCID: PMC8891068 DOI: 10.1016/j.devcel.2022.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 12/09/2021] [Accepted: 01/21/2022] [Indexed: 11/30/2022]
Abstract
Skeletal stem cells (SSCs) reside within a three-dimensional extracellular matrix (ECM) compartment and differentiate into multiple cell lineages, thereby controlling tissue maintenance and regeneration. Within this environment, SSCs can proteolytically remodel the surrounding ECM in response to growth factors that direct lineage commitment via undefined mechanisms. Here, we report that Mmp14-dependent ECM remodeling coordinates canonical Wnt signaling and guides stem cell fate by triggering an integrin-activated reorganization of the SCC cytoskeleton that controls nuclear lamin A/C levels via the linker of nucleoskeleton and cytoskeleton (LINC) complexes. In turn, SSC lamin A/C levels dictate the localization of emerin, an inner nuclear membrane protein whose ability to regulate β-catenin activity modulates Wnt signaling while directing lineage commitment in vitro and in vivo. These findings define a previously undescribed axis wherein SSCs use Mmp14-dependent ECM remodeling to control cytoskeletal and nucleoskeletal organization, thereby governing Wnt-dependent stem cell fate decisions.
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Affiliation(s)
- Yi Tang
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Lingxin Zhu
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109,Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Jung-Sun Cho
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109,Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Xiao-Yan Li
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109,Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Stephen J. Weiss
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109,Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109,Corresponding Authors: Stephen J. Weiss, MD, , Life Sciences Institute, Mary Sue Coleman Hall, University of Michigan, 210 Washtenaw, Ann Arbor, MI 48109-2216, Yi Tang, PhD, , Life Sciences Institute, Mary Sue Coleman Hall, University of Michigan, 210 Washtenaw, Ann Arbor, MI 48109-2216
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20
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Nicolas HA, Hua K, Quigley H, Ivare J, Tesson F, Akimenko MA. A CRISPR/Cas9 zebrafish lamin A/C mutant model of muscular laminopathy. Dev Dyn 2021; 251:645-661. [PMID: 34599606 DOI: 10.1002/dvdy.427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 08/13/2021] [Accepted: 09/16/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Lamin A/C gene (LMNA) mutations frequently cause cardiac and/or skeletal muscle diseases called striated muscle laminopathies. We created a zebrafish muscular laminopathy model using CRISPR/Cas9 technology to target the zebrafish lmna gene. RESULTS Heterozygous and homozygous lmna mutants present skeletal muscle damage at 1 day post-fertilization (dpf), and mobility impairment at 4 to 7 dpf. Cardiac structure and function analyses between 1 and 7 dpf show mild and transient defects in the lmna mutants compared to wild type (WT). Quantitative RT-PCR analysis of genes implicated in striated muscle laminopathies show a decrease in jun and nfκb2 expression in 7 dpf homozygous lmna mutants compared to WT. Homozygous lmna mutants have a 1.26-fold protein increase in activated Erk 1/2, kinases associated with striated muscle laminopathies, compared to WT at 7 dpf. Activated Protein Kinase C alpha (Pkc α), a kinase that interacts with lamin A/C and Erk 1/2, is also upregulated in 7 dpf homozygous lmna mutants compared to WT. CONCLUSIONS This study presents an animal model of skeletal muscle laminopathy where heterozygous and homozygous lmna mutants exhibit prominent skeletal muscle abnormalities during the first week of development. Furthermore, this is the first animal model that potentially implicates Pkc α in muscular laminopathies.
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Affiliation(s)
- Hannah A Nicolas
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
| | - Khang Hua
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
| | - Hailey Quigley
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
| | - Joshua Ivare
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
| | - Frédérique Tesson
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Marie-Andrée Akimenko
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
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21
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Watanabe H, Belyea BC, Paxton RL, Li M, Dzamba BJ, DeSimone DW, Gomez RA, Sequeira-Lopez MLS. Renin Cell Baroreceptor, a Nuclear Mechanotransducer Central for Homeostasis. Circ Res 2021; 129:262-276. [PMID: 33993729 PMCID: PMC8273135 DOI: 10.1161/circresaha.120.318711] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
[Figure: see text].
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Affiliation(s)
- Hirofumi Watanabe
- Department of Pediatrics, Child Health Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Brian C. Belyea
- Department of Pediatrics, Child Health Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Robert L. Paxton
- Department of Pediatrics, Child Health Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Minghong Li
- Department of Pediatrics, Child Health Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Bette J. Dzamba
- Department of Cell Biology, University of Virginia, School of Medicine, Charlottesville, Virginia
| | - Douglas W. DeSimone
- Department of Cell Biology, University of Virginia, School of Medicine, Charlottesville, Virginia
| | - R. Ariel Gomez
- Department of Pediatrics, Child Health Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Maria Luisa S. Sequeira-Lopez
- Department of Pediatrics, Child Health Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
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22
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Liu SY, Ikegami K. Nuclear lamin phosphorylation: an emerging role in gene regulation and pathogenesis of laminopathies. Nucleus 2021; 11:299-314. [PMID: 33030403 PMCID: PMC7588210 DOI: 10.1080/19491034.2020.1832734] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Decades of studies have established that nuclear lamin polymers form the nuclear lamina, a protein meshwork that supports the nuclear envelope structure and tethers heterochromatin to the nuclear periphery. Much less is known about unpolymerized nuclear lamins in the nuclear interior, some of which are now known to undergo specific phosphorylation. A recent finding that phosphorylated lamins bind gene enhancer regions offers a new hypothesis that lamin phosphorylation may influence transcriptional regulation in the nuclear interior. In this review, we discuss the regulation, localization, and functions of phosphorylated lamins. We summarize kinases that phosphorylate lamins in a variety of biological contexts. Our discussion extends to laminopathies, a spectrum of degenerative disorders caused by lamin gene mutations, such as cardiomyopathies and progeria. We compare the prevailing hypothesis for laminopathy pathogenesis based on lamins’ function at the nuclear lamina with an emerging hypothesis based on phosphorylated lamins’ function in the nuclear interior.
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Affiliation(s)
- Sunny Yang Liu
- Department of Pediatrics, The University of Chicago , Chicago, Illinois, USA
| | - Kohta Ikegami
- Department of Pediatrics, The University of Chicago , Chicago, Illinois, USA.,Division of Molecular and Cardiovascular Biology, Cincinnati Children's Hospital Medical Center , Cincinnati, Ohio, USA
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23
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Auguste G, Rouhi L, Matkovich SJ, Coarfa C, Robertson MJ, Czernuszewicz G, Gurha P, Marian AJ. BET bromodomain inhibition attenuates cardiac phenotype in myocyte-specific lamin A/C-deficient mice. J Clin Invest 2021; 130:4740-4758. [PMID: 32484798 DOI: 10.1172/jci135922] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 05/27/2020] [Indexed: 01/03/2023] Open
Abstract
Mutation in the LMNA gene, encoding lamin A/C, causes a diverse group of diseases called laminopathies. Cardiac involvement is the major cause of death and manifests as dilated cardiomyopathy, heart failure, arrhythmias, and sudden death. There is no specific therapy for LMNA-associated cardiomyopathy. We report that deletion of Lmna in cardiomyocytes in mice leads to severe cardiac dysfunction, conduction defect, ventricular arrhythmias, fibrosis, apoptosis, and premature death within 4 weeks. The phenotype is similar to LMNA-associated cardiomyopathy in humans. RNA sequencing, performed before the onset of cardiac dysfunction, led to identification of 2338 differentially expressed genes (DEGs) in Lmna-deleted cardiomyocytes. DEGs predicted activation of bromodomain-containing protein 4 (BRD4), a regulator of chromatin-associated proteins and transcription factors, which was confirmed by complementary approaches, including chromatin immunoprecipitation sequencing. Daily injection of JQ1, a specific BET bromodomain inhibitor, partially reversed the DEGs, including those encoding secretome; improved cardiac function; abrogated cardiac arrhythmias, fibrosis, and apoptosis; and prolonged the median survival time 2-fold in the myocyte-specific Lmna-deleted mice. The findings highlight the important role of LMNA in cardiomyocytes and identify BET bromodomain inhibition as a potential therapeutic target in LMNA-associated cardiomyopathy, for which there is no specific effective therapy.
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Affiliation(s)
- Gaelle Auguste
- Center for Cardiovascular Genetics, Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, and Department of Medicine, University of Texas Health Sciences Center at Houston, Houston, Texas, USA
| | - Leila Rouhi
- Center for Cardiovascular Genetics, Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, and Department of Medicine, University of Texas Health Sciences Center at Houston, Houston, Texas, USA
| | - Scot J Matkovich
- Department of Medicine, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Cristian Coarfa
- Department of Cell Biology, Baylor College of Medicine, Houston, Texas, USA
| | | | - Grazyna Czernuszewicz
- Center for Cardiovascular Genetics, Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, and Department of Medicine, University of Texas Health Sciences Center at Houston, Houston, Texas, USA
| | - Priyatansh Gurha
- Center for Cardiovascular Genetics, Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, and Department of Medicine, University of Texas Health Sciences Center at Houston, Houston, Texas, USA
| | - Ali J Marian
- Center for Cardiovascular Genetics, Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, and Department of Medicine, University of Texas Health Sciences Center at Houston, Houston, Texas, USA
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24
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The nuclear envelope protein Net39 is essential for muscle nuclear integrity and chromatin organization. Nat Commun 2021; 12:690. [PMID: 33514739 PMCID: PMC7846557 DOI: 10.1038/s41467-021-20987-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 12/24/2020] [Indexed: 01/14/2023] Open
Abstract
Lamins and transmembrane proteins within the nuclear envelope regulate nuclear structure and chromatin organization. Nuclear envelope transmembrane protein 39 (Net39) is a muscle nuclear envelope protein whose functions in vivo have not been explored. We show that mice lacking Net39 succumb to severe myopathy and juvenile lethality, with concomitant disruption in nuclear integrity, chromatin accessibility, gene expression, and metabolism. These abnormalities resemble those of Emery-Dreifuss muscular dystrophy (EDMD), caused by mutations in A-type lamins (LMNA) and other genes, like Emerin (EMD). We observe that Net39 is downregulated in EDMD patients, implicating Net39 in the pathogenesis of this disorder. Our findings highlight the role of Net39 at the nuclear envelope in maintaining muscle chromatin organization, gene expression and function, and its potential contribution to the molecular etiology of EDMD.
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25
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Son JW, Shin JJ, Kim MG, Kim J, Son SW. Keratinocyte-specific knockout mice models via Cre–loxP recombination system. Mol Cell Toxicol 2021. [DOI: 10.1007/s13273-020-00115-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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Dubik N, Mai S. Lamin A/C: Function in Normal and Tumor Cells. Cancers (Basel) 2020; 12:cancers12123688. [PMID: 33316938 PMCID: PMC7764147 DOI: 10.3390/cancers12123688] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/07/2020] [Accepted: 12/08/2020] [Indexed: 02/07/2023] Open
Abstract
Simple Summary The aim of this review is to summarize lamin A/C’s currently known functions in both normal and diseased cells. Lamin A/C is a nuclear protein with many functions in cells, such as maintaining a cell’s structural stability, cell motility, mechanosensing, chromosome organization, gene regulation, cell differentiation, DNA damage repair, and telomere protection. Mutations of the lamin A/C gene, incorrect processing of the protein, and lamin A/C deregulation can lead to various diseases and cancer. This review touches on diseases caused by mutation and incorrect processing of lamin A/C, called laminopathies. The effect of lamin A/C deregulation in cancer is also reviewed, and lamin A/C’s potential in helping to diagnose prostate cancers more accurately is discussed. Abstract This review is focused on lamin A/C, a nuclear protein with multiple functions in normal and diseased cells. Its functions, as known to date, are summarized. This summary includes its role in maintaining a cell’s structural stability, cell motility, mechanosensing, chromosome organization, gene regulation, cell differentiation, DNA damage repair, and telomere protection. As lamin A/C has a variety of critical roles within the cell, mutations of the lamin A/C gene and incorrect processing of the protein results in a wide variety of diseases, ranging from striated muscle disorders to accelerated aging diseases. These diseases, collectively termed laminopathies, are also touched upon. Finally, we review the existing evidence of lamin A/C’s deregulation in cancer. Lamin A/C deregulation leads to various traits, including genomic instability and increased tolerance to mechanical insult, which can lead to more aggressive cancer and poorer prognosis. As lamin A/C’s expression in specific cancers varies widely, currently known lamin A/C expression in various cancers is reviewed. Additionally, Lamin A/C’s potential as a biomarker in various cancers and as an aid in more accurately diagnosing intermediate Gleason score prostate cancers is also discussed.
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27
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Lomakin AJ, Cattin CJ, Cuvelier D, Alraies Z, Molina M, Nader GPF, Srivastava N, Sáez PJ, Garcia-Arcos JM, Zhitnyak IY, Bhargava A, Driscoll MK, Welf ES, Fiolka R, Petrie RJ, De Silva NS, González-Granado JM, Manel N, Lennon-Duménil AM, Müller DJ, Piel M. The nucleus acts as a ruler tailoring cell responses to spatial constraints. Science 2020; 370:eaba2894. [PMID: 33060332 PMCID: PMC8059074 DOI: 10.1126/science.aba2894] [Citation(s) in RCA: 246] [Impact Index Per Article: 61.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 06/29/2020] [Accepted: 08/28/2020] [Indexed: 12/12/2022]
Abstract
The microscopic environment inside a metazoan organism is highly crowded. Whether individual cells can tailor their behavior to the limited space remains unclear. In this study, we found that cells measure the degree of spatial confinement by using their largest and stiffest organelle, the nucleus. Cell confinement below a resting nucleus size deforms the nucleus, which expands and stretches its envelope. This activates signaling to the actomyosin cortex via nuclear envelope stretch-sensitive proteins, up-regulating cell contractility. We established that the tailored contractile response constitutes a nuclear ruler-based signaling pathway involved in migratory cell behaviors. Cells rely on the nuclear ruler to modulate the motive force that enables their passage through restrictive pores in complex three-dimensional environments, a process relevant to cancer cell invasion, immune responses, and embryonic development.
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Affiliation(s)
- A J Lomakin
- St. Anna Children's Cancer Research Institute (CCRI), Vienna, Austria.
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases (LBI-RUD), Vienna, Austria
- CeMM Research Center for Molecular Medicine, Austrian Academy of Sciences (ÖAW), Vienna, Austria
- Medical University of Vienna (MUV), Vienna, Austria
- Centre for Stem Cells and Regenerative Medicine, School of Basic and Medical Biosciences, King's College London, London, UK
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France
| | - C J Cattin
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland
| | - D Cuvelier
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France
- Institut Pierre Gilles de Gennes, PSL Research University, Paris, France
| | - Z Alraies
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France
- Institut Pierre Gilles de Gennes, PSL Research University, Paris, France
- Institut Curie, PSL Research University, INSERM, U 932, Paris, France
| | - M Molina
- Centre for Stem Cells and Regenerative Medicine, School of Basic and Medical Biosciences, King's College London, London, UK
| | - G P F Nader
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France
- Institut Pierre Gilles de Gennes, PSL Research University, Paris, France
| | - N Srivastava
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France
- Institut Pierre Gilles de Gennes, PSL Research University, Paris, France
| | - P J Sáez
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France
- Institut Pierre Gilles de Gennes, PSL Research University, Paris, France
| | - J M Garcia-Arcos
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France
- Institut Pierre Gilles de Gennes, PSL Research University, Paris, France
| | - I Y Zhitnyak
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France
- Institut Pierre Gilles de Gennes, PSL Research University, Paris, France
- N.N. Blokhin Medical Research Center of Oncology, Moscow, Russia
| | - A Bhargava
- Institut Curie, PSL Research University, INSERM, U 932, Paris, France
| | - M K Driscoll
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - E S Welf
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - R Fiolka
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - R J Petrie
- Department of Biology, Drexel University, Philadelphia, PA, USA
| | - N S De Silva
- Institut Curie, PSL Research University, INSERM, U 932, Paris, France
| | - J M González-Granado
- LamImSys Lab, Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigación Hospital 12 de Octubre (imas12), Madrid, Spain
| | - N Manel
- Institut Curie, PSL Research University, INSERM, U 932, Paris, France
| | | | - D J Müller
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland.
| | - M Piel
- Institut Curie, PSL Research University, CNRS, UMR 144, Paris, France.
- Institut Pierre Gilles de Gennes, PSL Research University, Paris, France
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28
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A Role of Lamin A/C in Preventing Neuromuscular Junction Decline in Mice. J Neurosci 2020; 40:7203-7215. [PMID: 32817327 DOI: 10.1523/jneurosci.0443-20.2020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 08/10/2020] [Accepted: 08/11/2020] [Indexed: 12/13/2022] Open
Abstract
During aging, skeletal muscles become atrophic and lose contractile force. Aging can also impact the neuromuscular junction (NMJ), a synapse that transmits signals from motoneurons to muscle fibers to control muscle contraction. However, in contrast to muscle aging that has been studied extensively, less is known about the molecular mechanisms of NMJ aging although its structure and function are impaired in aged animals. To this end, we performed RNA sequencing (RNA-seq) analysis to identify genes whose expression in synapse-rich region is altered. Gene ontology (GO) analysis highlighted genes relating to nuclear structure or function. In particular, lamin A/C, an intermediate filament protein critical for the interphase nuclear architecture, was reduced. Remarkably, mutation of lamin A/C in muscles or motoneurons had no effect on NMJ formation in either sex of mice, but the muscle mutation caused progressive denervation, acetylcholine receptor (AChR) cluster fragmentation, and neuromuscular dysfunction. Interestingly, rapsyn, a protein critical to AChR clustering, was reduced in mutant muscle cells; and expressing rapsyn in muscles attenuated NMJ deficits of HSA-Lmna-/- mice. These results reveal a role of lamin A/C in NMJ maintenance and suggest that nuclear dysfunction or deficiency may contribute to NMJ deficits in aged muscles.SIGNIFICANCE STATEMENT This study provides evidence that lamin A/C, a scaffolding component of the nuclear envelope, is critical to maintaining the NMJ in mice. Its muscle-specific mutation led to progressive NMJ degeneration in vivo We showed that the mutation reduced the level of rapsyn, a protein necessary for acetylcholine receptor (AChR) clustering; and expression of rapsyn in muscles attenuated NMJ deficits of HSA-Lmna-/- mice. These results reveal a role of lamin A/C in NMJ maintenance and suggest that nuclear dysfunction or deficiency may contribute to NMJ deficits in aged muscles.
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29
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Role of the Nuclear Lamina in Age-Associated Nuclear Reorganization and Inflammation. Cells 2020; 9:cells9030718. [PMID: 32183360 PMCID: PMC7140666 DOI: 10.3390/cells9030718] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 02/06/2023] Open
Abstract
Aging is characterized by the gradual loss of tissue function and integrity. Activation of inflammatory responses accelerates the deterioration of cells and tissues. Many studies have shown that alteration of the components of the nuclear lamina is associated with inflammation, both in vivo and in vitro. However, the mechanism by which the nuclear lamina regulates inflammation is largely unknown. Recent studies have suggested that the nuclear lamina regulates both organization of the three-dimensional chromatin structure at the nuclear periphery and global gene expression, such as the expression of inflammatory response genes. Here, we discuss the current updates in the research on nuclear lamina alteration, activation of inflammation, and nuclear reorganization in models of cellular senescence and organismal aging.
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30
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Yue S, Zheng X, Zheng Y. Cell-type-specific role of lamin-B1 in thymus development and its inflammation-driven reduction in thymus aging. Aging Cell 2019; 18:e12952. [PMID: 30968547 PMCID: PMC6612680 DOI: 10.1111/acel.12952] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 02/21/2019] [Accepted: 03/01/2019] [Indexed: 12/31/2022] Open
Abstract
Cellular architectural proteins often participate in organ development and maintenance. Although functional decay of some of these proteins during aging is known, the cell-type-specific developmental role and the cause and consequence of their subsequent decay remain to be established especially in mammals. By studying lamins, the nuclear structural proteins, we demonstrate that lamin-B1 functions specifically in the thymic epithelial cells (TECs) for proper thymus organogenesis. An up-regulation of proinflammatory cytokines in the intra-thymic myeloid immune cells during aging accompanies a gradual reduction of lamin-B1 in adult TECs. We show that these cytokines can cause senescence and lamin-B1 reduction of the young adult TECs. Lamin-B1 supports the expression of TEC genes that can help maintain the adult TEC subtypes we identified by single-cell RNA-sequencing, thymic architecture, and function. Thus, structural proteins involved in organ building and maintenance can undergo inflammation-driven decay which can in turn contribute to age-associated organ degeneration.
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Affiliation(s)
- Sibiao Yue
- Department of EmbryologyCarnegie Institution for ScienceBaltimoreMaryland
- Department of BiologyJohns Hopkins UniversityBaltimoreMaryland
| | - Xiaobin Zheng
- Department of BiologyJohns Hopkins UniversityBaltimoreMaryland
| | - Yixian Zheng
- Department of EmbryologyCarnegie Institution for ScienceBaltimoreMaryland
- Department of BiologyJohns Hopkins UniversityBaltimoreMaryland
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31
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Wang Y, Shin JY, Nakanishi K, Homma S, Kim GJ, Tanji K, Joseph LC, Morrow JP, Stewart CL, Dauer WT, Worman HJ. Postnatal development of mice with combined genetic depletions of lamin A/C, emerin and lamina-associated polypeptide 1. Hum Mol Genet 2019; 28:2486-2500. [PMID: 31009944 DOI: 10.1093/hmg/ddz082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/28/2019] [Accepted: 04/15/2019] [Indexed: 01/18/2023] Open
Abstract
Mutations in LMNA encoding lamin A/C and EMD encoding emerin cause cardiomyopathy and muscular dystrophy. Lmna null mice develop these disorders and have a lifespan of 7-8 weeks. Emd null mice show no overt pathology and have normal skeletal muscle but with regeneration defects. We generated mice with germline deletions of both Lmna and Emd to determine the effects of combined loss of the encoded proteins. Mice without lamin A/C and emerin are born at the expected Mendelian ratio, are grossly normal at birth but have shorter lifespans than those lacking only lamin A/C. However, there are no major differences between these mice with regards to left ventricular function, heart ultrastructure or electrocardiographic parameters except for slower heart rates in the mice lacking both lamin A/C and emerin. Skeletal muscle is similarly affected in both of these mice. Lmna+/- mice also lacking emerin live to at least 1 year and have no significant differences in growth, heart or skeletal muscle compared to Lmna+/- mice. Deletion of the mouse gene encoding lamina-associated protein 1 leads to prenatal death; however, mice with heterozygous deletion of this gene lacking both lamin A/C and emerin are born at the expected Mendelian ratio but had a shorter lifespan than those only lacking lamin A/C and emerin. These results show that mice with combined deficiencies of three interacting nuclear envelope proteins have normal embryonic development and that early postnatal defects are primarily driven by loss of lamin A/C or lamina-associated polypeptide 1 rather than emerin.
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Affiliation(s)
- Yuexia Wang
- Department of Medicine and.,Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Ji-Yeon Shin
- Department of Medicine and.,Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | | | | | | | - Kurenai Tanji
- Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | | | | | - Colin L Stewart
- Development and Regenerative Biology Group, Institute of Medical Biology, Immunos, Singapore
| | - Willian T Dauer
- Department of Neurology.,Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, 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, USA
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32
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Cellular and Animal Models of Striated Muscle Laminopathies. Cells 2019; 8:cells8040291. [PMID: 30934932 PMCID: PMC6523539 DOI: 10.3390/cells8040291] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/18/2019] [Accepted: 03/25/2019] [Indexed: 01/12/2023] Open
Abstract
The lamin A/C (LMNA) gene codes for nuclear intermediate filaments constitutive of the nuclear lamina. LMNA has 12 exons and alternative splicing of exon 10 results in two major isoforms—lamins A and C. Mutations found throughout the LMNA gene cause a group of diseases collectively known as laminopathies, of which the type, diversity, penetrance and severity of phenotypes can vary from one individual to the other, even between individuals carrying the same mutation. The majority of the laminopathies affect cardiac and/or skeletal muscles. The underlying molecular mechanisms contributing to such tissue-specific phenotypes caused by mutations in a ubiquitously expressed gene are not yet well elucidated. This review will explore the different phenotypes observed in established models of striated muscle laminopathies and their respective contributions to advancing our understanding of cardiac and skeletal muscle-related laminopathies. Potential future directions for developing effective treatments for patients with lamin A/C mutation-associated cardiac and/or skeletal muscle conditions will be discussed.
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33
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Hutchinson-Gilford Progeria Syndrome-Current Status and Prospects for Gene Therapy Treatment. Cells 2019; 8:cells8020088. [PMID: 30691039 PMCID: PMC6406247 DOI: 10.3390/cells8020088] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 01/18/2019] [Accepted: 01/19/2019] [Indexed: 12/13/2022] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is one of the most severe disorders among laminopathies—a heterogeneous group of genetic diseases with a molecular background based on mutations in the LMNA gene and genes coding for interacting proteins. HGPS is characterized by the presence of aging-associated symptoms, including lack of subcutaneous fat, alopecia, swollen veins, growth retardation, age spots, joint contractures, osteoporosis, cardiovascular pathology, and death due to heart attacks and strokes in childhood. LMNA codes for two major, alternatively spliced transcripts, give rise to lamin A and lamin C proteins. Mutations in the LMNA gene alone, depending on the nature and location, may result in the expression of abnormal protein or loss of protein expression and cause at least 11 disease phenotypes, differing in severity and affected tissue. LMNA gene-related HGPS is caused by a single mutation in the LMNA gene in exon 11. The mutation c.1824C > T results in activation of the cryptic donor splice site, which leads to the synthesis of progerin protein lacking 50 amino acids. The accumulation of progerin is the reason for appearance of the phenotype. In this review, we discuss current knowledge on the molecular mechanisms underlying the development of HGPS and provide a critical analysis of current research trends in this field. We also discuss the mouse models available so far, the current status of treatment of the disease, and future prospects for the development of efficient therapies, including gene therapy for HGPS.
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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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Brady GF, Kwan R, Cunha JB, Elenbaas JS, Omary MB. Lamins and Lamin-Associated Proteins in Gastrointestinal Health and Disease. Gastroenterology 2018; 154:1602-1619.e1. [PMID: 29549040 PMCID: PMC6038707 DOI: 10.1053/j.gastro.2018.03.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/04/2018] [Accepted: 03/06/2018] [Indexed: 02/07/2023]
Abstract
The nuclear lamina is a multi-protein lattice composed of A- and B-type lamins and their associated proteins. This protein lattice associates with heterochromatin and integral inner nuclear membrane proteins, providing links among the genome, nucleoskeleton, and cytoskeleton. In the 1990s, mutations in EMD and LMNA were linked to Emery-Dreifuss muscular dystrophy. Since then, the number of diseases attributed to nuclear lamina defects, including laminopathies and other disorders, has increased to include more than 20 distinct genetic syndromes. Studies of patients and mouse genetic models have pointed to important roles for lamins and their associated proteins in the function of gastrointestinal organs, including liver and pancreas. We review the interactions and functions of the lamina in relation to the nuclear envelope and genome, the ways in which its dysfunction is thought to contribute to human disease, and possible avenues for targeted therapies.
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Affiliation(s)
- Graham F. Brady
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan,Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan,To whom correspondence should be addressed: University of Michigan Medical School, Division of Gastroenterology, Department of Internal Medicine, 1137 Catherine St., Ann Arbor, MI 48109-5622.
| | - Raymond Kwan
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Juliana Bragazzi Cunha
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Jared S. Elenbaas
- Medical Scientist Training Program, Washington University, St Louis, Missouri
| | - M. Bishr Omary
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan,Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan,Ǻbo Akademi University, Turku, Finland
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Kim Y, Bayona PW, Kim M, Chang J, Hong S, Park Y, Budiman A, Kim YJ, Choi CY, Kim WS, Lee J, Cho KW. Macrophage Lamin A/C Regulates Inflammation and the Development of Obesity-Induced Insulin Resistance. Front Immunol 2018; 9:696. [PMID: 29731750 PMCID: PMC5920030 DOI: 10.3389/fimmu.2018.00696] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 03/21/2018] [Indexed: 01/28/2023] Open
Abstract
Obesity-induced chronic low-grade inflammation, in particular in adipose tissue, contributes to the development of insulin resistance and type 2 diabetes. However, the mechanism by which obesity induces adipose tissue inflammation has not been completely elucidated. Recent studies suggest that alteration of the nuclear lamina is associated with age-associated chronic inflammation in humans and fly. These findings led us to investigate whether the nuclear lamina regulates obesity-mediated chronic inflammation. In this study, we show that lamin A/C mediates inflammation in macrophages. The gene and protein expression levels of lamin A/C are significantly increased in epididymal adipose tissues from obese rodent models and omental fat from obese human subjects compared to their lean controls. Flow cytometry and gene expression analyses reveal that the protein and gene expression levels of lamin A/C are increased in adipose tissue macrophages (ATMs) by obesity. We further show that ectopic overexpression of lamin A/C in macrophages spontaneously activates NF-κB, and increases the gene expression levels of proinflammatory genes, such as Il6, Tnf, Ccl2, and Nos2. Conversely, deletion of lamin A/C in macrophages reduces LPS-induced expression of these proinflammatory genes. Importantly, we find that myeloid cell-specific lamin A/C deficiency ameliorates obesity-induced insulin resistance and adipose tissue inflammation. Thus, our data suggest that lamin A/C mediates the activation of ATM inflammation by regulating NF-κB, thereby contributing to the development of obesity-induced insulin resistance.
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Affiliation(s)
- Youngjo Kim
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheon-an, South Korea
| | - Princess Wendy Bayona
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheon-an, South Korea
| | - Miri Kim
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheon-an, South Korea
| | - Jiyeon Chang
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheon-an, South Korea
| | - Sunmin Hong
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheon-an, South Korea
| | - Yoona Park
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheon-an, South Korea
| | - Andrea Budiman
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheon-an, South Korea
| | - Yong-Jin Kim
- Department of Surgery, Soonchunhyang University Hospital, Seoul, South Korea
| | - Chang Yong Choi
- Department of Plastic and Reconstructive Surgery, Soonchunhyang University Hospital, Gumi, South Korea
| | - Woo Seok Kim
- Department of Surgery, Soonchunhyang University Gumi Hospital, Gumi, South Korea
| | - Jongsoon Lee
- The Joslin Diabetes Center, Department of Medicine, Harvard Medical School, Boston, MA, United States
| | - Kae Won Cho
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheon-an, South Korea
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Birendra Kc, May DG, Benson BV, Kim DI, Shivega WG, Ali MH, Faustino RS, Campos AR, Roux KJ. VRK2A is an A-type lamin-dependent nuclear envelope kinase that phosphorylates BAF. Mol Biol Cell 2017. [PMID: 28637768 PMCID: PMC5555652 DOI: 10.1091/mbc.e17-03-0138] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
By the use of comparative BioID of nuclear envelope (NE) proteins lamin A and Sun2, as well as a minimal inner nuclear membrane targeting motif, VRK2 is identified as a novel constituent of the NE. A-type lamins retain the transmembrane kinase VRK2 at the NE, where it phosphorylates and regulates the nuclear mobility of BAF. The nuclear envelope (NE) is critical for numerous fundamental cellular functions, and mutations in several NE constituents can lead to a heterogeneous spectrum of diseases. We used proximity biotinylation to uncover new constituents of the inner nuclear membrane (INM) by comparative BioID analysis of lamin A, Sun2 and a minimal INM-targeting motif. These studies identify vaccinia-related kinase-2 (VRK2) as a candidate constituent of the INM. The transmembrane VRK2A isoform is retained at the NE by association with A-type lamins. Furthermore, VRK2A physically interacts with A-type, but not B-type, lamins. Finally, we show that VRK2 phosphorylates barrier to autointegration factor (BAF), a small and highly dynamic chromatin-binding protein, which has roles including NE reassembly, cell cycle, and chromatin organization in cells, and subtly alters its nuclear mobility. Together these findings support the value of using BioID to identify unrecognized constituents of distinct subcellular compartments refractory to biochemical isolation and reveal VRK2A as a transmembrane kinase in the NE that regulates BAF.
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Affiliation(s)
- Birendra Kc
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD 57104
| | - Danielle G May
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD 57104
| | - Benjamin V Benson
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD 57104
| | - Dae In Kim
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD 57104
| | - Winnie G Shivega
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD 57104
| | - Manaal H Ali
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD 57104
| | - Randolph S Faustino
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD 57104.,Department of Pediatrics, Sanford School of Medicine, University of South Dakota, Sioux Falls, SD 57105
| | - Alexandre R Campos
- Proteomics Facility, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
| | - Kyle J Roux
- Sanford Children's Health Research Center, Sanford Research, Sioux Falls, SD 57104 .,Department of Pediatrics, Sanford School of Medicine, University of South Dakota, Sioux Falls, SD 57105
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Butchart LC, Fox A, Shavlakadze T, Grounds MD. The long and short of non-coding RNAs during post-natal growth and differentiation of skeletal muscles: Focus on lncRNA and miRNAs. Differentiation 2016; 92:237-248. [DOI: 10.1016/j.diff.2016.05.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 04/29/2016] [Accepted: 05/09/2016] [Indexed: 10/21/2022]
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Lee YK, Jiang Y, Ran XR, Lau YM, Ng KM, Lai WHK, Siu CW, Tse HF. Recent advances in animal and human pluripotent stem cell modeling of cardiac laminopathy. Stem Cell Res Ther 2016; 7:139. [PMID: 27649756 PMCID: PMC5029055 DOI: 10.1186/s13287-016-0401-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Laminopathy is a disease closely related to deficiency of the nuclear matrix protein lamin A/C or failure in prelamin A processing, and leads to accumulation of the misfold protein causing progeria. The resultant disrupted lamin function is highly associated with abnormal nuclear architecture, cell senescence, apoptosis, and unstable genome integrity. To date, the effects of loss in nuclear integrity on the susceptible organ, striated muscle, have been commonly associated with muscular dystrophy, dilated cardiac myopathy (DCM), and conduction defeats, but have not been studied intensively. In this review, we aim to summarize recent breakthroughs in an in vivo laminopathy model and in vitro study using patient-specific human induced pluripotent stem cells (iPSCs) that reproduce the pathophysiological phenotype for further drug screening. We describe several in-vivo transgenic mouse models to elucidate the effects of Lmna H222P, N195K mutations, and LMNA knockout on cardiac function, in terms of hemodynamic and electrical signal propagation; certain strategies targeted on stress-related MAPK are mentioned. We will also discuss human iPSC cardiomyocytes serving as a platform to reveal the underlying mechanisms, such as the altered mechanical sensation in electrical coupling of the heart conduction system and ion channel alternation in relation to altered nuclear architecture, and furthermore to enable screening of drugs that can attenuate this cardiac premature aging phenotype by inhibition of prelamin misfolding and oxidative stress, and also enhancement of autophagy protein clearance and cardiac-protective microRNA.
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Affiliation(s)
- Yee-Ki Lee
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Yu Jiang
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Xin-Ru Ran
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Yee-Man Lau
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Kwong-Man Ng
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Wing-Hon Kevin Lai
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Chung-Wah Siu
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China
| | - Hung-Fat Tse
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China. .,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China. .,Shenzhen Institutes of Research and Innovation, University of Hong Kong, Hong Kong, SAR, China.
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40
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Borsos M, Torres-Padilla ME. Building up the nucleus: nuclear organization in the establishment of totipotency and pluripotency during mammalian development. Genes Dev 2016; 30:611-21. [PMID: 26980186 PMCID: PMC4803048 DOI: 10.1101/gad.273805.115] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In mammals, epigenetic reprogramming, the acquisition and loss of totipotency, and the first cell fate decision all occur within a 3-d window after fertilization from the one-cell zygote to the formation of the blastocyst. These processes are poorly understood in molecular detail, yet this is an essential prerequisite to uncover principles of stem cells, chromatin biology, and thus regenerative medicine. A unique feature of preimplantation development is the drastic genome-wide changes occurring to nuclear architecture. From studying somatic and in vitro cultured embryonic stem cells (ESCs) it is becoming increasingly established that the three-dimensional (3D) positions of genomic loci relative to each other and to specific compartments of the nucleus can act on the regulation of gene expression, potentially driving cell fate. However, the functionality, mechanisms, and molecular characteristics of the changes in nuclear organization during preimplantation development are only now beginning to be unraveled. Here, we discuss the peculiarities of nuclear compartments and chromatin organization during mammalian preimplantation development in the context of the transition from totipotency to pluripotency.
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Affiliation(s)
- Máté Borsos
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, U964, Centre National de la Recherche Scientifique/Institut National de la Santé et de la Recherche Médicale F-67404 Illkirch, France; Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München D-81377 München, Germany
| | - Maria-Elena Torres-Padilla
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, U964, Centre National de la Recherche Scientifique/Institut National de la Santé et de la Recherche Médicale F-67404 Illkirch, France; Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München D-81377 München, Germany
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41
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Guo Y, Zheng Y. Lamins position the nuclear pores and centrosomes by modulating dynein. Mol Biol Cell 2015; 26:3379-89. [PMID: 26246603 PMCID: PMC4591684 DOI: 10.1091/mbc.e15-07-0482] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 07/29/2015] [Indexed: 12/30/2022] Open
Abstract
Nuclear lamins counterbalance dynein forces on nuclear pore complexes through BICD2 and ensure even nuclear pore complex distribution and proper centrosome separation at prophase. Lamins, the type V nuclear intermediate filament proteins, are reported to function in both interphase and mitosis. For example, lamin deletion in various cell types can lead to an uneven distribution of the nuclear pore complexes (NPCs) in the interphase nuclear envelope, whereas deletion of B-type lamins results in spindle orientation defects in mitotic neural progenitor cells. How lamins regulate these functions is unknown. Using mouse cells deleted of different combinations or all lamins, we show that lamins are required to prevent the aggregation of NPCs in the nuclear envelope near centrosomes in late G2 and prophase. This asymmetric NPC distribution in the absence of lamins is caused by dynein forces acting on NPCs via the dynein adaptor BICD2. We further show that asymmetric NPC distribution upon lamin depletion disrupts the distribution of BICD2 and p150 dynactin on the nuclear envelope at prophase, which results in inefficient dynein-driven centrosome separation during prophase. Therefore lamins regulate microtubule-based motor forces in vivo to ensure proper NPC distribution in interphase and centrosome separation in the mitotic prophase.
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Affiliation(s)
- Yuxuan Guo
- Department of Biology, Johns Hopkins University, Baltimore, MD 21218; Department of Embryology, Carnegie Institution for Science, Baltimore, MD 21218
| | - Yixian Zheng
- Department of Biology, Johns Hopkins University, Baltimore, MD 21218; Department of Embryology, Carnegie Institution for Science, Baltimore, MD 21218
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42
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Abstract
The intermediate filament proteins, A- and B-type lamins, form the nuclear lamina scaffold adjacent to the inner nuclear membrane. Lamins also contribute to chromatin regulation and various signaling pathways affecting gene expression. In this review, Osmanagic-Myers et al. focus on the role of nuclear lamins in mechanosensing and also discuss how disease-linked lamin mutants may impair the response of cells to mechanical stimuli and influence the properties of the extracellular matrix. The intermediate filament proteins, A- and B-type lamins, form the nuclear lamina scaffold adjacent to the inner nuclear membrane. B-type lamins confer elasticity, while A-type lamins lend viscosity and stiffness to nuclei. Lamins also contribute to chromatin regulation and various signaling pathways affecting gene expression. The mechanical roles of lamins and their functions in gene regulation are often viewed as independent activities, but recent findings suggest a highly cross-linked and interdependent regulation of these different functions, particularly in mechanosignaling. In this newly emerging concept, lamins act as a “mechanostat” that senses forces from outside and responds to tension by reinforcing the cytoskeleton and the extracellular matrix. A-type lamins, emerin, and the linker of the nucleoskeleton and cytoskeleton (LINC) complex directly transmit forces from the extracellular matrix into the nucleus. These mechanical forces lead to changes in the molecular structure, modification, and assembly state of A-type lamins. This in turn activates a tension-induced “inside-out signaling” through which the nucleus feeds back to the cytoskeleton and the extracellular matrix to balance outside and inside forces. These functions regulate differentiation and may be impaired in lamin-linked diseases, leading to cellular phenotypes, particularly in mechanical load-bearing tissues.
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Wang AS, Kozlov SV, Stewart CL, Horn HF. Tissue specific loss of A-type lamins in the gastrointestinal epithelium can enhance polyp size. Differentiation 2015; 89:11-21. [PMID: 25578479 DOI: 10.1016/j.diff.2014.12.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 12/08/2014] [Accepted: 12/17/2014] [Indexed: 12/19/2022]
Abstract
The nuclear lamina, comprised of the A and B-type lamins, is important in maintaining nuclear shape and in regulating key nuclear functions such as chromatin organization and transcription. Deletion of the A-type lamins results in genome instability and many cancers show altered levels of A-type lamin expression. Loss of function mutations in the mouse Lmna gene result in early postnatal lethality, usually within 3-5 weeks of birth making an analysis of the role of lamins in carcinogenesis difficult. To circumvent early lethality, and determine the role of the A-type lamins in specific tissues in older mice we derived a conditional allele of Lmna(FL/FL) (floxed). Lmna(FL/FL) was specifically deleted in the gastrointestinal (GI) epithelium by crossing the Lmna(FL/FL) mice with Villin-Cre mice. Mice lacking Lmna in the GI are overtly normal with no effects on overall growth, longevity or GI morphology. On a GI specific sensitized (Apc(Min/+)) background, polyp numbers are unchanged, but polyp size is slightly increased, and only in the duodenum. Our findings reveal that although A-type lamins are dispensable in the postnatal GI epithelium, loss of Lmna under malignant conditions may, to a limited extent, enhance polyp size indicating that A-type lamins may regulate cell proliferation in the transformed GI epithelium.
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Affiliation(s)
- Audrey S Wang
- Developmental and Regenerative Biology, Institute of Medical Biology, 8A Biomedical Grove, 138648, Singapore; Department of Biological Sciences, NUS, Singapore
| | - Serguei V Kozlov
- Center for Advanced Preclinical Research, Science Applications International Corporation-Frederick, Frederick, MD 21702, United States
| | - Colin L Stewart
- Developmental and Regenerative Biology, Institute of Medical Biology, 8A Biomedical Grove, 138648, Singapore; Department of Biological Sciences, NUS, Singapore.
| | - Henning F Horn
- Developmental and Regenerative Biology, Institute of Medical Biology, 8A Biomedical Grove, 138648, Singapore
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44
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Nuclear lamina remodelling and its implications for human disease. Cell Tissue Res 2014; 360:621-31. [DOI: 10.1007/s00441-014-2069-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 11/11/2014] [Indexed: 10/24/2022]
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45
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Abstract
Lamins A and C, encoded by LMNA, are constituent of the nuclear lamina, a meshwork of proteins underneath the nuclear envelope first described as scaffolding proteins of the nucleus. Since the discovery of LMNA mutations in highly heterogeneous human disorders (including cardiac and muscular dystrophies, lipodystrophies and progeria), the number of functions described for lamin A/C has expanded. Lamin A/C is notably involved in the regulation of chromatin structure and gene transcription, and in the resistance of cells to mechanical stress. This review focuses on studies performed on knock-out and knock-in Lmna mouse models, which have led to decipher some of the lamin A/C functions in striated muscles and to the first preclinical trials of pharmaceutical therapies.
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46
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Abstract
In eukaryotes, the function of the cell's nucleus has primarily been considered to be the repository for the organism's genome. However, this rather simplistic view is undergoing a major shift, as it is increasingly apparent that the nucleus has functions extending beyond being a mere genome container. Recent findings have revealed that the structural composition of the nucleus changes during development and that many of these components exhibit cell- and tissue-specific differences. Increasing evidence is pointing to the nucleus being integral to the function of the interphase cytoskeleton, with changes to nuclear structural proteins having ramifications affecting cytoskeletal organization and the cell's interactions with the extracellular environment. Many of these functions originate at the nuclear periphery, comprising the nuclear envelope (NE) and underlying lamina. Together, they may act as a "hub" in integrating cellular functions including chromatin organization, transcriptional regulation, mechanosignaling, cytoskeletal organization, and signaling pathways. Interest in such an integral role has been largely stimulated by the discovery that many diseases and anomalies are caused by defects in proteins of the NE/lamina, the nuclear envelopathies, many of which, though rare, are providing insights into their more common variants that are some of the major issues of the twenty-first century public health. Here, we review the contributions that mouse mutants have made to our current understanding of the NE/lamina, their respective roles in disease and the use of mice in developing potential therapies for treating the diseases.
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