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Ferreira‐Marques M, Carvalho A, Franco AC, Leal A, Botelho M, Carmo‐Silva S, Águas R, Cortes L, Lucas V, Real AC, López‐Otín C, Nissan X, de Almeida LP, Cavadas C, Aveleira CA. Ghrelin delays premature aging in Hutchinson-Gilford progeria syndrome. Aging Cell 2023; 22:e13983. [PMID: 37858983 PMCID: PMC10726901 DOI: 10.1111/acel.13983] [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: 07/13/2023] [Revised: 08/22/2023] [Accepted: 08/25/2023] [Indexed: 10/21/2023] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a rare and fatal genetic condition that arises from a single nucleotide alteration in the LMNA gene, leading to the production of a defective lamin A protein known as progerin. The accumulation of progerin accelerates the onset of a dramatic premature aging phenotype in children with HGPS, characterized by low body weight, lipodystrophy, metabolic dysfunction, skin, and musculoskeletal age-related dysfunctions. In most cases, these children die of age-related cardiovascular dysfunction by their early teenage years. The absence of effective treatments for HGPS underscores the critical need to explore novel safe therapeutic strategies. In this study, we show that treatment with the hormone ghrelin increases autophagy, decreases progerin levels, and alleviates other cellular hallmarks of premature aging in human HGPS fibroblasts. Additionally, using a HGPS mouse model (LmnaG609G/G609G mice), we demonstrate that ghrelin administration effectively rescues molecular and histopathological progeroid features, prevents progressive weight loss in later stages, reverses the lipodystrophic phenotype, and extends lifespan of these short-lived mice. Therefore, our findings uncover the potential of modulating ghrelin signaling offers new treatment targets and translational approaches that may improve outcomes and enhance the quality of life for patients with HGPS and other age-related pathologies.
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Affiliation(s)
- Marisa Ferreira‐Marques
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
- CIBB – Center for Innovative Biomedicine and BiotechnologyUniversity of CoimbraCoimbraPortugal
- Faculty of PharmacyUniversity of CoimbraCoimbraPortugal
| | - André Carvalho
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
| | - Ana Catarina Franco
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
- CIBB – Center for Innovative Biomedicine and BiotechnologyUniversity of CoimbraCoimbraPortugal
- Faculty of PharmacyUniversity of CoimbraCoimbraPortugal
| | - Ana Leal
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
| | - Mariana Botelho
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
| | - Sara Carmo‐Silva
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
- CIBB – Center for Innovative Biomedicine and BiotechnologyUniversity of CoimbraCoimbraPortugal
| | - Rodolfo Águas
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
| | - Luísa Cortes
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
- CIBB – Center for Innovative Biomedicine and BiotechnologyUniversity of CoimbraCoimbraPortugal
| | - Vasco Lucas
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
| | - Ana Carolina Real
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
| | - Carlos López‐Otín
- Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Instituto Universitario de OncologíaUniversidad de OviedoOviedoSpain
| | - Xavier Nissan
- CECS, I‐StemCorbeil‐EssonnesFrance
- INSERM U861, I‐StemCorbeil‐EssonnesFrance
- UEVE U861, I‐StemCorbeil‐EssonnesFrance
| | - Luís Pereira de Almeida
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
- CIBB – Center for Innovative Biomedicine and BiotechnologyUniversity of CoimbraCoimbraPortugal
- Faculty of PharmacyUniversity of CoimbraCoimbraPortugal
| | - Cláudia Cavadas
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
- CIBB – Center for Innovative Biomedicine and BiotechnologyUniversity of CoimbraCoimbraPortugal
- Faculty of PharmacyUniversity of CoimbraCoimbraPortugal
| | - Célia A. Aveleira
- CNC – Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbraPortugal
- CIBB – Center for Innovative Biomedicine and BiotechnologyUniversity of CoimbraCoimbraPortugal
- MIA‐Portugal – Multidisciplinar Institute of AgeingUniversity of CoimbraCoimbraPortugal
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2
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Worman HJ, Michaelis S. Prelamin A and ZMPSTE24 in premature and physiological aging. Nucleus 2023; 14:2270345. [PMID: 37885131 PMCID: PMC10730219 DOI: 10.1080/19491034.2023.2270345] [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: 08/29/2023] [Accepted: 10/06/2023] [Indexed: 10/28/2023] Open
Abstract
As human longevity increases, understanding the molecular mechanisms that drive aging becomes ever more critical to promote health and prevent age-related disorders. Premature aging disorders or progeroid syndromes can provide critical insights into aspects of physiological aging. A major cause of progeroid syndromes which result from mutations in the genes LMNA and ZMPSTE24 is disruption of the final posttranslational processing step in the production of the nuclear scaffold protein lamin A. LMNA encodes the lamin A precursor, prelamin A and ZMPSTE24 encodes the prelamin A processing enzyme, the zinc metalloprotease ZMPSTE24. Progeroid syndromes resulting from mutations in these genes include the clinically related disorders Hutchinson-Gilford progeria syndrome (HGPS), mandibuloacral dysplasia-type B, and restrictive dermopathy. These diseases have features that overlap with one another and with some aspects of physiological aging, including bone defects resembling osteoporosis and atherosclerosis (the latter primarily in HGPS). The progeroid syndromes have ignited keen interest in the relationship between defective prelamin A processing and its accumulation in normal physiological aging. In this review, we examine the hypothesis that diminished processing of prelamin A by ZMPSTE24 is a driver of physiological aging. We review features a new mouse (LmnaL648R/L648R) that produces solely unprocessed prelamin A and provides an ideal model for examining the effects of its accumulation during aging. We also discuss existing data on the accumulation of prelamin A or its variants in human physiological aging, which call out for further validation and more rigorous experimental approaches to determine if prelamin A contributes to normal aging.
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Affiliation(s)
- 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
| | - Susan Michaelis
- Department of Cell Biology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
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3
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Emerson FJ, Lee SS. Chromatin: the old and young of it. Front Mol Biosci 2023; 10:1270285. [PMID: 37877123 PMCID: PMC10591336 DOI: 10.3389/fmolb.2023.1270285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/20/2023] [Indexed: 10/26/2023] Open
Abstract
Aging affects nearly all aspects of our cells, from our DNA to our proteins to how our cells handle stress and communicate with each other. Age-related chromatin changes are of particular interest because chromatin can dynamically respond to the cellular and organismal environment, and many modifications at chromatin are reversible. Changes at chromatin occur during aging, and evidence from model organisms suggests that chromatin factors could play a role in modulating the aging process itself, as altering proteins that work at chromatin often affect the lifespan of yeast, worms, flies, and mice. The field of chromatin and aging is rapidly expanding, and high-resolution genomics tools make it possible to survey the chromatin environment or track chromatin factors implicated in longevity with precision that was not previously possible. In this review, we discuss the state of chromatin and aging research. We include examples from yeast, Drosophila, mice, and humans, but we particularly focus on the commonly used aging model, the worm Caenorhabditis elegans, in which there are many examples of chromatin factors that modulate longevity. We include evidence of both age-related changes to chromatin and evidence of specific chromatin factors linked to longevity in core histones, nuclear architecture, chromatin remodeling, and histone modifications.
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Affiliation(s)
| | - Siu Sylvia Lee
- Lee Lab, Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY, United States
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4
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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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Maynard S, Hall A, Galanos P, Rizza S, Yamamoto T, Gram H, Munk SHN, Shoaib M, Sørensen CS, Bohr V, Lerdrup M, Maya-Mendoza A, Bartek J. Lamin A/C impairments cause mitochondrial dysfunction by attenuating PGC1α and the NAMPT-NAD+ pathway. Nucleic Acids Res 2022; 50:9948-9965. [PMID: 36099415 PMCID: PMC9508839 DOI: 10.1093/nar/gkac741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 07/30/2022] [Accepted: 08/30/2022] [Indexed: 11/14/2022] Open
Abstract
Mutations in the lamin A/C gene (LMNA) cause laminopathies such as the premature aging Hutchinson Gilford progeria syndrome (HGPS) and altered lamin A/C levels are found in diverse malignancies. The underlying lamin-associated mechanisms remain poorly understood. Here we report that lamin A/C-null mouse embryo fibroblasts (Lmna-/- MEFs) and human progerin-expressing HGPS fibroblasts both display reduced NAD+ levels, unstable mitochondrial DNA and attenuated bioenergetics. This mitochondrial dysfunction is associated with reduced chromatin recruitment (Lmna-/- MEFs) or low levels (HGPS) of PGC1α, the key transcription factor for mitochondrial homeostasis. Lmna-/- MEFs showed reduced expression of the NAD+-biosynthesis enzyme NAMPT and attenuated activity of the NAD+-dependent deacetylase SIRT1. We find high PARylation in lamin A/C-aberrant cells, further decreasing the NAD+ pool and consistent with impaired DNA base excision repair in both cell models, a condition that fuels DNA damage-induced PARylation under oxidative stress. Further, ATAC-sequencing revealed a substantially altered chromatin landscape in Lmna-/- MEFs, including aberrantly reduced accessibility at the Nampt gene promoter. Thus, we identified a new role of lamin A/C as a key modulator of mitochondrial function through impairments of PGC1α and the NAMPT-NAD+ pathway, with broader implications for the aging process.
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Affiliation(s)
- Scott Maynard
- Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark
| | - Arnaldur Hall
- Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark
| | | | - Salvatore Rizza
- Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark
| | - Tatsuro Yamamoto
- Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark
| | | | | | - Muhammad Shoaib
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Claus Storgaard Sørensen
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Vilhelm A Bohr
- Department of Cellular and Molecular Medicine, Center for Healthy Aging, University of Copenhagen, DK-2200 Copenhagen, Denmark
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
| | - Mads Lerdrup
- The DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | | | - Jiri Bartek
- Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark
- Division of Genome Biology, Department of Medical Biochemistry and Biophysics, Science for Life Laboratory, Karolinska Institute, SE-17177 Stockholm, Sweden
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6
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Abolishing the prelamin A ZMPSTE24 cleavage site leads to progeroid phenotypes with near-normal longevity in mice. Proc Natl Acad Sci U S A 2022; 119:2118695119. [PMID: 35197292 PMCID: PMC8892526 DOI: 10.1073/pnas.2118695119] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2022] [Indexed: 01/13/2023] Open
Abstract
The zinc metalloprotease ZMPSTE24 removes the last 15 amino acids of prelamin A, including a farnesylated cysteine, to produce mature lamin A. The premature aging disorder Hutchinson–Gilford progeria syndrome is caused by a permanently farnesylated prelamin A variant lacking the ZMPSTE24 cleavage site. ZMPSTE24 loss of function leads to the accumulation of farnesylated prelamin A and causes progeroid disorders. Some studies have implicated prelamin A in physiological aging. We describe mice with an amino acid substitution in prelamin A that blocks the ZMPSTE24-catalyzed cleavage. These mice develop progeroid phenotypes but, in contrast to those modeling Hutchinson–Gilford progeria syndrome or ZMPSTE24 deficiency, have near-normal lifespans, thus providing a model to study the effects of farnesylated prelamin A during aging. Prelamin A is a farnesylated precursor of lamin A, a nuclear lamina protein. Accumulation of the farnesylated prelamin A variant progerin, with an internal deletion including its processing site, causes Hutchinson–Gilford progeria syndrome. Loss-of-function mutations in ZMPSTE24, which encodes the prelamin A processing enzyme, lead to accumulation of full-length farnesylated prelamin A and cause related progeroid disorders. Some data suggest that prelamin A also accumulates with physiological aging. Zmpste24−/− mice die young, at ∼20 wk. Because ZMPSTE24 has functions in addition to prelamin A processing, we generated a mouse model to examine effects solely due to the presence of permanently farnesylated prelamin A. These mice have an L648R amino acid substitution in prelamin A that blocks ZMPSTE24-catalyzed processing to lamin A. The LmnaL648R/L648R mice express only prelamin and no mature protein. Notably, nearly all survive to 65 to 70 wk, with ∼40% of male and 75% of female LmnaL648R/L648R mice having near-normal lifespans of 90 wk (almost 2 y). Starting at ∼10 wk of age, LmnaL648R/L648R mice of both sexes have lower body masses than controls. By ∼20 to 30 wk of age, they exhibit detectable cranial, mandibular, and dental defects similar to those observed in Zmpste24−/− mice and have decreased vertebral bone density compared to age- and sex-matched controls. Cultured embryonic fibroblasts from LmnaL648R/L648R mice have aberrant nuclear morphology that is reversible by treatment with a protein farnesyltransferase inhibitor. These novel mice provide a model to study the effects of farnesylated prelamin A during physiological aging.
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Kang SM, Yoon MH, Lee SJ, Ahn J, Yi SA, Nam KH, Park S, Woo TG, Cho JH, Lee J, Ha NC, Park BJ. Human WRN is an intrinsic inhibitor of progerin, abnormal splicing product of lamin A. Sci Rep 2021; 11:9122. [PMID: 33907225 PMCID: PMC8079706 DOI: 10.1038/s41598-021-88325-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 04/09/2021] [Indexed: 02/07/2023] Open
Abstract
Werner syndrome (WRN) is a rare progressive genetic disorder, caused by functional defects in WRN protein and RecQ4L DNA helicase. Acceleration of the aging process is initiated at puberty and the expected life span is approximately the late 50 s. However, a Wrn-deficient mouse model does not show premature aging phenotypes or a short life span, implying that aging processes differ greatly between humans and mice. Gene expression analysis of WRN cells reveals very similar results to gene expression analysis of Hutchinson Gilford progeria syndrome (HGPS) cells, suggesting that these human progeroid syndromes share a common pathological mechanism. Here we show that WRN cells also express progerin, an abnormal variant of the lamin A protein. In addition, we reveal that duplicated sequences of human WRN (hWRN) from exon 9 to exon 10, which differ from the sequence of mouse WRN (mWRN), are a natural inhibitor of progerin. Overexpression of hWRN reduced progerin expression and aging features in HGPS cells. Furthermore, the elimination of progerin by siRNA or a progerin-inhibitor (SLC-D011 also called progerinin) can ameliorate senescence phenotypes in WRN fibroblasts and cardiomyocytes, derived from WRN-iPSCs. These results suggest that progerin, which easily accumulates under WRN-deficient conditions, can lead to premature aging in WRN and that this effect can be prevented by SLC-D011.
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Affiliation(s)
- So-Mi Kang
- Department of Molecular Biology, Pusan National University, Busan, Republic of Korea
| | - Min-Ho Yoon
- Department of Molecular Biology, Pusan National University, Busan, Republic of Korea
| | - Su-Jin Lee
- Department of Molecular Biology, Pusan National University, Busan, Republic of Korea
| | - Jinsook Ahn
- Program in Food Science and Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Sang Ah Yi
- School of Pharmacy, Sungkyunkwan University, Suwon, Kyunggi-Do, Republic of Korea
| | - Ki Hong Nam
- School of Pharmacy, Sungkyunkwan University, Suwon, Kyunggi-Do, Republic of Korea
| | - Soyoung Park
- Department of Molecular Biology, Pusan National University, Busan, Republic of Korea
| | - Tae-Gyun Woo
- Department of Molecular Biology, Pusan National University, Busan, Republic of Korea
| | - Jung-Hyun Cho
- Department of Molecular Biology, Pusan National University, Busan, Republic of Korea
| | - Jaecheol Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, Kyunggi-Do, Republic of Korea
| | - Nam-Chul Ha
- Program in Food Science and Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Bum-Joon Park
- Department of Molecular Biology, Pusan National University, Busan, Republic of Korea.
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8
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Crasto S, My I, Di Pasquale E. The Broad Spectrum of LMNA Cardiac Diseases: From Molecular Mechanisms to Clinical Phenotype. Front Physiol 2020; 11:761. [PMID: 32719615 PMCID: PMC7349320 DOI: 10.3389/fphys.2020.00761] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 06/11/2020] [Indexed: 12/13/2022] Open
Abstract
Mutations of Lamin A/C gene (LMNA) cause laminopathies, a group of disorders associated with a wide spectrum of clinically distinct phenotypes, affecting different tissues and organs. Heart involvement is frequent and leads to cardiolaminopathy LMNA-dependent cardiomyopathy (LMNA-CMP), a form of dilated cardiomyopathy (DCM) typically associated with conduction disorders and arrhythmias, that can manifest either as an isolated event or as part of a multisystem phenotype. Despite the recent clinical and molecular developments in the field, there is still lack of knowledge linking specific LMNA gene mutations to the distinct clinical manifestations. Indeed, the severity and progression of the disease have marked interindividual variability, even amongst members of the same family. Studies conducted so far have described Lamin A/C proteins involved in diverse biological processes, that span from a structural role in the nucleus to the regulation of response to mechanical stress and gene expression, proposing various mechanistic hypotheses. However, none of those is per se able to fully justify functional and clinical phenotypes of LMNA-CMP; therefore, the role of Lamin A/C in cardiac pathophysiology still represents an open question. In this review we provide an update on the state-of-the-art studies on cardiolaminopathy, in the attempt to draw a line connecting molecular mechanisms to clinical manifestations. While investigators in this field still wonder about a clear genotype/phenotype correlation in LMNA-CMP, our intent here is to recapitulate common mechanistic hypotheses that link different mutations to similar clinical presentations.
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Affiliation(s)
- Silvia Crasto
- Humanitas Clinical and Research Center - IRCCS, Rozzano, Italy.,Institute of Genetic and Biomedical Research (IRGB) - UOS of Milan, National Research Council (CNR), Milan, Italy
| | - Ilaria My
- Humanitas Clinical and Research Center - IRCCS, Rozzano, Italy
| | - Elisa Di Pasquale
- Humanitas Clinical and Research Center - IRCCS, Rozzano, Italy.,Institute of Genetic and Biomedical Research (IRGB) - UOS of Milan, National Research Council (CNR), Milan, Italy
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9
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del Campo L, Sánchez-López A, González-Gómez C, Andrés-Manzano MJ, Dorado B, Andrés V. Vascular Smooth Muscle Cell-Specific Progerin Expression Provokes Contractile Impairment in a Mouse Model of Hutchinson-Gilford Progeria Syndrome that Is Ameliorated by Nitrite Treatment. Cells 2020; 9:cells9030656. [PMID: 32182706 PMCID: PMC7140649 DOI: 10.3390/cells9030656] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 02/27/2020] [Accepted: 03/05/2020] [Indexed: 12/20/2022] Open
Abstract
Cardiovascular disease (CVD) is the main cause of death worldwide, and aging is its leading risk factor. Aging is much accelerated in Hutchinson–Gilford progeria syndrome (HGPS), an ultra-rare genetic disorder provoked by the ubiquitous expression of a mutant protein called progerin. HGPS patients die in their teens, primarily due to cardiovascular complications. The primary causes of age-associated CVD are endothelial dysfunction and dysregulated vascular tone; however, their contribution to progerin-induced CVD remains poorly characterized. In the present study, we found that progeroid LmnaG609G/G609G mice with ubiquitous progerin expression show both endothelial dysfunction and severe contractile impairment. To assess the relative contribution of specific vascular cell types to these anomalies, we examined LmnaLCS/LCSTie2Cretg/+ and LmnaLCS/LCSSm22αCretg/+ mice, which express progerin specifically in endothelial cells (ECs) and vascular smooth muscle cells (VSMCs), respectively. Whereas vessel contraction was impaired in mice with VSMC-specific progerin expression, we observed no endothelial dysfunction in mice with progerin expression restricted to VSMCs or ECs. Vascular tone regulation in progeroid mice was ameliorated by dietary sodium nitrite supplementation. Our results identify VSMCs as the main cell type causing contractile impairment in a mouse model of HGPS that is ameliorated by nitrite treatment.
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Affiliation(s)
- Lara del Campo
- Laboratory of Molecular and Genetic Cardiovascular Pathophysiology, Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain; (L.d.C.); (A.S.-L.); (C.G.-G.); (M.J.A.-M.); (B.D.)
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Spain
| | - Amanda Sánchez-López
- Laboratory of Molecular and Genetic Cardiovascular Pathophysiology, Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain; (L.d.C.); (A.S.-L.); (C.G.-G.); (M.J.A.-M.); (B.D.)
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Spain
| | - Cristina González-Gómez
- Laboratory of Molecular and Genetic Cardiovascular Pathophysiology, Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain; (L.d.C.); (A.S.-L.); (C.G.-G.); (M.J.A.-M.); (B.D.)
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Spain
| | - María Jesús Andrés-Manzano
- Laboratory of Molecular and Genetic Cardiovascular Pathophysiology, Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain; (L.d.C.); (A.S.-L.); (C.G.-G.); (M.J.A.-M.); (B.D.)
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Spain
| | - Beatriz Dorado
- Laboratory of Molecular and Genetic Cardiovascular Pathophysiology, Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain; (L.d.C.); (A.S.-L.); (C.G.-G.); (M.J.A.-M.); (B.D.)
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Spain
| | - Vicente Andrés
- Laboratory of Molecular and Genetic Cardiovascular Pathophysiology, Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain; (L.d.C.); (A.S.-L.); (C.G.-G.); (M.J.A.-M.); (B.D.)
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Spain
- Correspondence: ; Tel.: +34-91-453-1200
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10
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Abstract
Cardiac ageing manifests as a decline in function leading to heart failure. At the cellular level, ageing entails decreased replicative capacity and dysregulation of cellular processes in myocardial and nonmyocyte cells. Various extrinsic parameters, such as lifestyle and environment, integrate important signalling pathways, such as those involving inflammation and oxidative stress, with intrinsic molecular mechanisms underlying resistance versus progression to cellular senescence. Mitigation of cardiac functional decline in an ageing organism requires the activation of enhanced maintenance and reparative capacity, thereby overcoming inherent endogenous limitations to retaining a youthful phenotype. Deciphering the molecular mechanisms underlying dysregulation of cellular function and renewal reveals potential interventional targets to attenuate degenerative processes at the cellular and systemic levels to improve quality of life for our ageing population. In this Review, we discuss the roles of extrinsic and intrinsic factors in cardiac ageing. Animal models of cardiac ageing are summarized, followed by an overview of the current and possible future treatments to mitigate the deleterious effects of cardiac ageing.
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11
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Salvarani N, Crasto S, Miragoli M, Bertero A, Paulis M, Kunderfranco P, Serio S, Forni A, Lucarelli C, Dal Ferro M, Larcher V, Sinagra G, Vezzoni P, Murry CE, Faggian G, Condorelli G, Di Pasquale E. The K219T-Lamin mutation induces conduction defects through epigenetic inhibition of SCN5A in human cardiac laminopathy. Nat Commun 2019; 10:2267. [PMID: 31118417 PMCID: PMC6531493 DOI: 10.1038/s41467-019-09929-w] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 04/06/2019] [Indexed: 12/14/2022] Open
Abstract
Mutations in LMNA, which encodes the nuclear proteins Lamin A/C, can cause cardiomyopathy and conduction disorders. Here, we employ induced pluripotent stem cells (iPSCs) generated from human cells carrying heterozygous K219T mutation on LMNA to develop a disease model. Cardiomyocytes differentiated from these iPSCs, and which thus carry K219T-LMNA, have altered action potential, reduced peak sodium current and diminished conduction velocity. Moreover, they have significantly downregulated Nav1.5 channel expression and increased binding of Lamin A/C to the promoter of SCN5A, the channel's gene. Coherently, binding of the Polycomb Repressive Complex 2 (PRC2) protein SUZ12 and deposition of the repressive histone mark H3K27me3 are increased at SCN5A. CRISPR/Cas9-mediated correction of the mutation re-establishes sodium current density and SCN5A expression. Thus, K219T-LMNA cooperates with PRC2 in downregulating SCN5A, leading to decreased sodium current density and slower conduction velocity. This mechanism may underlie the conduction abnormalities associated with LMNA-cardiomyopathy.
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Affiliation(s)
- Nicolò Salvarani
- Institute of Genetic and Biomedical Research (IRGB), UOS of Milan, National Research Council of Italy, Milan, 20138, Italy
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy
| | - Silvia Crasto
- Institute of Genetic and Biomedical Research (IRGB), UOS of Milan, National Research Council of Italy, Milan, 20138, Italy
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy
| | - Michele Miragoli
- Institute of Genetic and Biomedical Research (IRGB), UOS of Milan, National Research Council of Italy, Milan, 20138, Italy
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy
- Department of Medicine and Surgery, University of Parma, Parma, 43121, Italy
| | - Alessandro Bertero
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, 98109, WA, USA
| | - Marianna Paulis
- Institute of Genetic and Biomedical Research (IRGB), UOS of Milan, National Research Council of Italy, Milan, 20138, Italy
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy
| | - Paolo Kunderfranco
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy
| | - Simone Serio
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy
| | - Alberto Forni
- Division of Cardiac Surgery, University of Verona, Verona, 37129, Italy
| | - Carla Lucarelli
- Division of Cardiac Surgery, University of Verona, Verona, 37129, Italy
| | - Matteo Dal Ferro
- Cardiovascular Department, "Ospedali Riuniti" and University of Trieste, Trieste, 34129, Italy
| | - Veronica Larcher
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy
| | - Gianfranco Sinagra
- Cardiovascular Department, "Ospedali Riuniti" and University of Trieste, Trieste, 34129, Italy
| | - Paolo Vezzoni
- Institute of Genetic and Biomedical Research (IRGB), UOS of Milan, National Research Council of Italy, Milan, 20138, Italy
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy
| | - Charles E Murry
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, 98109, WA, USA
| | - Giuseppe Faggian
- Division of Cardiac Surgery, University of Verona, Verona, 37129, Italy
| | - Gianluigi Condorelli
- Institute of Genetic and Biomedical Research (IRGB), UOS of Milan, National Research Council of Italy, Milan, 20138, Italy.
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy.
- Humanitas University, Rozzano (MI), 20089, Italy.
| | - Elisa Di Pasquale
- Institute of Genetic and Biomedical Research (IRGB), UOS of Milan, National Research Council of Italy, Milan, 20138, Italy.
- Department of Cardiovascular Medicine and Laboratory of Medical Biotechnology, Humanitas Clinical and Research Center - IRCCS, Rozzano (MI), 20089, Italy.
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12
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Dorado B, Pløen GG, Barettino A, Macías A, Gonzalo P, Andrés-Manzano MJ, González-Gómez C, Galán-Arriola C, Alfonso JM, Lobo M, López-Martín GJ, Molina A, Sánchez-Sánchez R, Gadea J, Sánchez-González J, Liu Y, Callesen H, Filgueiras-Rama D, Ibáñez B, Sørensen CB, Andrés V. Generation and characterization of a novel knockin minipig model of Hutchinson-Gilford progeria syndrome. Cell Discov 2019; 5:16. [PMID: 30911407 PMCID: PMC6423020 DOI: 10.1038/s41421-019-0084-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/15/2019] [Accepted: 01/22/2019] [Indexed: 01/22/2023] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is an extremely rare genetic disorder for which no cure exists. The disease is characterized by premature aging and inevitable death in adolescence due to cardiovascular complications. Most HGPS patients carry a heterozygous de novo LMNA c.1824C > T mutation, which provokes the expression of a dominant-negative mutant protein called progerin. Therapies proven effective in HGPS-like mouse models have yielded only modest benefit in HGPS clinical trials. To overcome the gap between HGPS mouse models and patients, we have generated by CRISPR-Cas9 gene editing the first large animal model for HGPS, a knockin heterozygous LMNA c.1824C > T Yucatan minipig. Like HGPS patients, HGPS minipigs endogenously co-express progerin and normal lamin A/C, and exhibit severe growth retardation, lipodystrophy, skin and bone alterations, cardiovascular disease, and die around puberty. Remarkably, the HGPS minipigs recapitulate critical cardiovascular alterations seen in patients, such as left ventricular diastolic dysfunction, altered cardiac electrical activity, and loss of vascular smooth muscle cells. Our analysis also revealed reduced myocardial perfusion due to microvascular damage and myocardial interstitial fibrosis, previously undescribed readouts potentially useful for monitoring disease progression in patients. The HGPS minipigs provide an appropriate preclinical model in which to test human-size interventional devices and optimize candidate therapies before advancing to clinical trials, thus accelerating the development of effective applications for HGPS patients.
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Affiliation(s)
- Beatriz Dorado
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - Gro Grunnet Pløen
- 3Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark.,4Department of Cardiology, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Ana Barettino
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - Alvaro Macías
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Pilar Gonzalo
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - María Jesús Andrés-Manzano
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - Cristina González-Gómez
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - Carlos Galán-Arriola
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - José Manuel Alfonso
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Manuel Lobo
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | | | - Antonio Molina
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Raúl Sánchez-Sánchez
- 5Laboratory of Physiology and Biotechnology of Reproduction in Swine, INIA (Spanish National Institute for Agricultural and Food Research and Technology), Madrid, Spain
| | - Joaquín Gadea
- 6Department of Physiology, University of Murcia and IMIB-Arrixaca, 30100 Murcia, Spain
| | | | - Ying Liu
- 8Department of Animal Science, Aarhus University, 8830 Tjele, Denmark
| | - Henrik Callesen
- 8Department of Animal Science, Aarhus University, 8830 Tjele, Denmark
| | - David Filgueiras-Rama
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain.,9Department of Cardiology, Cardiac Electrophysiology Unit, Hospital Clínico San Carlos, Madrid, Spain
| | - Borja Ibáñez
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain.,10Department of Cardiology, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz Hospital, Madrid, Spain
| | - Charlotte Brandt Sørensen
- 3Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark.,4Department of Cardiology, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Vicente Andrés
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
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13
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Serebryannyy LA, Ball DA, Karpova TS, Misteli T. Single molecule analysis of lamin dynamics. Methods 2019; 157:56-65. [PMID: 30145357 PMCID: PMC6387858 DOI: 10.1016/j.ymeth.2018.08.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 08/20/2018] [Accepted: 08/21/2018] [Indexed: 12/28/2022] Open
Abstract
The nuclear envelope (NE) is an essential cellular structure that contributes to nuclear stability, organization, and function. Mutations in NE-associated proteins result in a myriad of pathologies with widely diverse clinical manifestations, ages of onsets, and affected tissues. Notably, several hundred disease-causing mutations have been mapped to the LMNA gene, which encodes the intermediate filament proteins lamin A and C, two of the major architectural components of the nuclear envelope. However, how NE dysfunction leads to the highly variable pathologies observed in patient cells and tissues remains poorly understood. One model suggests alterations in the dynamic properties of the nuclear lamina and its associated proteins contribute to disease phenotype. Here, we describe the application of single molecule tracking (SMT) methodology to characterize the behavior of nuclear envelope transmembrane proteins and nuclear lamins in their native cellular environment at the single molecule level. As proof-of-concept, we demonstrate by SMT that Halo-tagged lamin B1, Samp1, lamin A, and lamin AΔ50 have distinct binding and kinetic properties, and we identify several disease-relevant mutants which exhibit altered binding dynamics. SMT is also able to separately probe the dynamics of the peripheral and the nucleoplasmic populations of lamin A mutants. We suggest that SMT is a robust and sensitive method to investigate the relationship between pathogenic mutations or cellular processes and protein dynamics at the NE.
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Affiliation(s)
- Leonid A Serebryannyy
- Cell Biology of Genomes Group, National Cancer Institute, National Institutes of Health, 41 Library Drive, Bethesda, MD 20892, USA
| | - David A Ball
- Center for Cancer Research, Laboratory of Receptor Biology and Gene Expression, Optical Microscopy Core, National Cancer Institute, National Institutes of Health, Building 41, 41 Library Drive, Bethesda, MD 20892, USA
| | - Tatiana S Karpova
- Center for Cancer Research, Laboratory of Receptor Biology and Gene Expression, Optical Microscopy Core, National Cancer Institute, National Institutes of Health, Building 41, 41 Library Drive, Bethesda, MD 20892, USA
| | - Tom Misteli
- Cell Biology of Genomes Group, National Cancer Institute, National Institutes of Health, 41 Library Drive, Bethesda, MD 20892, USA.
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14
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Brommage R, Ohlsson C. High Fidelity of Mouse Models Mimicking Human Genetic Skeletal Disorders. Front Endocrinol (Lausanne) 2019; 10:934. [PMID: 32117046 PMCID: PMC7010808 DOI: 10.3389/fendo.2019.00934] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 12/23/2019] [Indexed: 12/24/2022] Open
Abstract
UNLABELLED The 2019 International Skeletal Dysplasia Society nosology update lists 441 genes for which mutations result in rare human skeletal disorders. These genes code for enzymes (33%), scaffolding proteins (18%), signal transduction proteins (16%), transcription factors (14%), cilia proteins (8%), extracellular matrix proteins (5%), and membrane transporters (4%). Skeletal disorders include aggrecanopathies, channelopathies, ciliopathies, cohesinopathies, laminopathies, linkeropathies, lysosomal storage diseases, protein-folding and RNA splicing defects, and ribosomopathies. With the goal of evaluating the ability of mouse models to mimic these human genetic skeletal disorders, a PubMed literature search identified 260 genes for which mutant mice were examined for skeletal phenotypes. These mouse models included spontaneous and ENU-induced mutants, global and conditional gene knockouts, and transgenic mice with gene over-expression or specific base-pair substitutions. The human X-linked gene ARSE and small nuclear RNA U4ATAC, a component of the minor spliceosome, do not have mouse homologs. Mouse skeletal phenotypes mimicking human skeletal disorders were observed in 249 of the 260 genes (96%) for which comparisons are possible. A supplemental table in spreadsheet format provides PubMed weblinks to representative publications of mutant mouse skeletal phenotypes. Mutations in 11 mouse genes (Ccn6, Cyp2r1, Flna, Galns, Gna13, Lemd3, Manba, Mnx1, Nsd1, Plod1, Smarcal1) do not result in similar skeletal phenotypes observed with mutations of the homologous human genes. These discrepancies can result from failure of mouse models to mimic the exact human gene mutations. There are no obvious commonalities among these 11 genes. Body BMD and/or radiologic dysmorphology phenotypes were successfully identified for 28 genes by the International Mouse Phenotyping Consortium (IMPC). Forward genetics using ENU mouse mutagenesis successfully identified 37 nosology gene phenotypes. Since many human genetic disorders involve hypomorphic, gain-of-function, dominant-negative and intronic mutations, future studies will undoubtedly utilize CRISPR/Cas9 technology to examine transgenic mice having genes modified to exactly mimic variant human sequences. Mutant mice will increasingly be employed for drug development studies designed to treat human genetic skeletal disorders. SIGNIFICANCE Great progress is being made identifying mutant genes responsible for human rare genetic skeletal disorders and mouse models for genes affecting bone mass, architecture, mineralization and strength. This review organizes data for 441 human genetic bone disorders with regard to heredity, gene function, molecular pathways, and fidelity of relevant mouse models to mimic the human skeletal disorders. PubMed weblinks to citations of 249 successful mouse models are provided.
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Affiliation(s)
- Robert Brommage
- Department of Internal Medicine and Clinical Nutrition, Centre for Bone and Arthritis Research, Institute of Medicine, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
- *Correspondence: Robert Brommage
| | - Claes Ohlsson
- Department of Internal Medicine and Clinical Nutrition, Centre for Bone and Arthritis Research, Institute of Medicine, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
- Department of Drug Treatment, Sahlgrenska University Hospital, Gothenburg, Sweden
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15
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Choi JY, Lai JK, Xiong ZM, Ren M, Moorer MC, Stains JP, Cao K. Diminished Canonical β-Catenin Signaling During Osteoblast Differentiation Contributes to Osteopenia in Progeria. J Bone Miner Res 2018; 33:2059-2070. [PMID: 30001457 PMCID: PMC7739562 DOI: 10.1002/jbmr.3549] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 06/25/2018] [Accepted: 06/30/2018] [Indexed: 12/31/2022]
Abstract
Patients with Hutchinson-Gilford progeria syndrome (HGPS) have low bone mass and an atypical skeletal geometry that manifests in a high risk of fractures. Using both in vitro and in vivo models of HGPS, we demonstrate that defects in the canonical WNT/β-catenin pathway, seemingly at the level of the efficiency of nuclear import of β-catenin, impair osteoblast differentiation and that restoring β-catenin activity rescues osteoblast differentiation and significantly improves bone mass. Specifically, we show that HGPS patient-derived iPSCs display defects in osteoblast differentiation, characterized by a decreased alkaline phosphatase activity and mineralizing capacity. We demonstrate that the canonical WNT/β-catenin pathway, a major signaling cascade involved in skeletal homeostasis, is impaired by progerin, causing a reduction in the active β-catenin in the nucleus and thus decreased transcriptional activity, and its reciprocal cytoplasmic accumulation. Blocking farnesylation of progerin restores active β-catenin accumulation in the nucleus, increasing signaling, and ameliorates the defective osteogenesis. Moreover, in vivo analysis of the Zmpste24-/- HGPS mouse model demonstrates that treatment with a sclerostin-neutralizing antibody (SclAb), which targets an antagonist of canonical WNT/β-catenin signaling pathway, fully rescues the low bone mass phenotype to wild-type levels. Together, this study reveals that the β-catenin signaling cascade is a therapeutic target for restoring defective skeletal microarchitecture in HGPS. © 2018 American Society for Bone and Mineral Research.
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Affiliation(s)
- Ji Young Choi
- Department of Cell Biology and Molecular Genetics, University of Maryland College Park, MD 20742
| | - Jim K Lai
- Department of Orthopedics, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Zheng-Mei Xiong
- Department of Cell Biology and Molecular Genetics, University of Maryland College Park, MD 20742
| | - Margaret Ren
- Department of Cell Biology and Molecular Genetics, University of Maryland College Park, MD 20742
| | - Megan C Moorer
- Department of Orthopedics, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Joseph P Stains
- Department of Orthopedics, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Kan Cao
- Department of Cell Biology and Molecular Genetics, University of Maryland College Park, MD 20742
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16
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Bhide S, Trujillo AS, O'Connor MT, Young GH, Cryderman DE, Chandran S, Nikravesh M, Wallrath LL, Melkani GC. Increasing autophagy and blocking Nrf2 suppress laminopathy-induced age-dependent cardiac dysfunction and shortened lifespan. Aging Cell 2018; 17:e12747. [PMID: 29575479 PMCID: PMC5946079 DOI: 10.1111/acel.12747] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2018] [Indexed: 12/16/2022] Open
Abstract
Mutations in the human LMNA gene cause a collection of diseases known as laminopathies. These include myocardial diseases that exhibit age-dependent penetrance of dysrhythmias and heart failure. The LMNA gene encodes A-type lamins, intermediate filaments that support nuclear structure and organize the genome. Mechanisms by which mutant lamins cause age-dependent heart defects are not well understood. To address this issue, we modeled human disease-causing mutations in the Drosophila melanogaster Lamin C gene and expressed mutant Lamin C exclusively in the heart. This resulted in progressive cardiac dysfunction, loss of adipose tissue homeostasis, and a shortened adult lifespan. Within cardiac cells, mutant Lamin C aggregated in the cytoplasm, the CncC(Nrf2)/Keap1 redox sensing pathway was activated, mitochondria exhibited abnormal morphology, and the autophagy cargo receptor Ref2(P)/p62 was upregulated. Genetic analyses demonstrated that simultaneous over-expression of the autophagy kinase Atg1 gene and an RNAi against CncC eliminated the cytoplasmic protein aggregates, restored cardiac function, and lengthened lifespan. These data suggest that simultaneously increasing rates of autophagy and blocking the Nrf2/Keap1 pathway are a potential therapeutic strategy for cardiac laminopathies.
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Affiliation(s)
- Shruti Bhide
- Department of Biology, Molecular Biology and Heart Institutes; San Diego State University; San Diego CA USA
| | - Adriana S. Trujillo
- Department of Biology, Molecular Biology and Heart Institutes; San Diego State University; San Diego CA USA
| | - Maureen T. O'Connor
- Department of Biochemistry; Carver College of Medicine; University of Iowa; Iowa City IA USA
| | - Grant H. Young
- Department of Biochemistry; Carver College of Medicine; University of Iowa; Iowa City IA USA
| | - Diane E. Cryderman
- Department of Biochemistry; Carver College of Medicine; University of Iowa; Iowa City IA USA
| | - Sahaana Chandran
- Department of Biology, Molecular Biology and Heart Institutes; San Diego State University; San Diego CA USA
| | - Mastaneh Nikravesh
- Department of Biology, Molecular Biology and Heart Institutes; San Diego State University; San Diego CA USA
| | - Lori L. Wallrath
- Department of Biochemistry; Carver College of Medicine; University of Iowa; Iowa City IA USA
| | - Girish C. Melkani
- Department of Biology, Molecular Biology and Heart Institutes; San Diego State University; San Diego CA USA
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17
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Gargiuli C, Schena E, Mattioli E, Columbaro M, D'Apice MR, Novelli G, Greggi T, Lattanzi G. Lamins and bone disorders: current understanding and perspectives. Oncotarget 2018; 9:22817-22831. [PMID: 29854317 PMCID: PMC5978267 DOI: 10.18632/oncotarget.25071] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 03/22/2018] [Indexed: 12/31/2022] Open
Abstract
Lamin A/C is a major constituent of the nuclear lamina implicated in a number of genetic diseases, collectively known as laminopathies. The most severe forms of laminopathies feature, among other symptoms, congenital scoliosis, osteoporosis, osteolysis or delayed cranial ossification. Importantly, specific bone districts are typically affected in laminopathies. Spine is severely affected in LMNA-linked congenital muscular dystrophy. Mandible, terminal phalanges and clavicles undergo osteolytic processes in progeroid laminopathies and Restrictive Dermopathy, a lethal developmental laminopathy. This specificity suggests that lamin A/C regulates fine mechanisms of bone turnover, as supported by data showing that lamin A/C mutations activate non-canonical pathways of osteoclastogenesis, as the one dependent on TGF beta 2. Here, we review current knowledge on laminopathies affecting bone and LMNA involvement in bone turnover and highlight lamin-dependent mechanisms causing bone disorders. This knowledge can be exploited to identify new therapeutic approaches not only for laminopathies, but also for other rare diseases featuring bone abnormalities.
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Affiliation(s)
- Chiara Gargiuli
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy
| | - Elisa Schena
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy.,Rizzoli Orthopaedic Institute, Laboratory of Cell Biology, Bologna, Italy
| | - Elisabetta Mattioli
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy.,Rizzoli Orthopaedic Institute, Laboratory of Cell Biology, Bologna, Italy
| | - Marta Columbaro
- Rizzoli Orthopaedic Institute, Laboratory of Cell Biology, Bologna, Italy
| | | | - Giuseppe Novelli
- Medical Genetics Unit, Policlinico Tor Vergata University Hospital, Rome, Italy
| | - Tiziana Greggi
- Rizzoli Orthopaedic Institute, Spine Deformity Department, Bologna, Italy
| | - Giovanna Lattanzi
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy.,Rizzoli Orthopaedic Institute, Laboratory of Cell Biology, Bologna, Italy
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18
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SMAD6 overexpression leads to accelerated myogenic differentiation of LMNA mutated cells. Sci Rep 2018; 8:5618. [PMID: 29618840 PMCID: PMC5884786 DOI: 10.1038/s41598-018-23918-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 03/22/2018] [Indexed: 12/23/2022] Open
Abstract
LMNA gene encodes lamins A and C, two major components of the nuclear lamina, a network of intermediate filaments underlying the inner nuclear membrane. Most of LMNA mutations are associated with cardiac and/or skeletal muscles defects. Muscle laminopathies include Emery-Dreifuss Muscular Dystrophy, Limb-Girdle Muscular Dystrophy 1B, LMNA-related Congenital Muscular Dystrophy and Dilated Cardiomyopathy with conduction defects. To identify potential alterations in signaling pathways regulating muscle differentiation in LMNA-mutated myoblasts, we used a previously described model of conditionally immortalized murine myoblasts: H-2K cell lines. Comparing gene expression profiles in wild-type and Lmna∆8–11 H-2K myoblasts, we identified two major alterations in the BMP (Bone Morphogenetic Protein) pathway: Bmp4 downregulation and Smad6 overexpression. We demonstrated that these impairments lead to Lmna∆8–11 myoblasts premature differentiation and can be rescued by downregulating Smad6 expression. Finally, we showed that BMP4 pathway defects are also present in myoblasts from human patients carrying different heterozygous LMNA mutations.
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19
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Alternative mRNA Splicing in the Pathogenesis of Obesity. Int J Mol Sci 2018; 19:ijms19020632. [PMID: 29473878 PMCID: PMC5855854 DOI: 10.3390/ijms19020632] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 02/21/2018] [Accepted: 02/21/2018] [Indexed: 12/22/2022] Open
Abstract
Alternative mRNA splicing is an important mechanism in expansion of proteome diversity by production of multiple protein isoforms. However, emerging evidence indicates that only a limited number of annotated protein isoforms by alternative splicing are detected, and the coding sequence of alternative splice variants usually is only slightly different from that of the canonical sequence. Nevertheless, mis-splicing is associated with a large array of human diseases. Previous reviews mainly focused on hereditary and somatic mutations in cis-acting RNA sequence elements and trans-acting splicing factors. The importance of environmental perturbations contributed to mis-splicing is not assessed. As significant changes in exon skipping and splicing factors expression levels are observed with diet-induced obesity, this review focuses on several well-known alternatively spliced metabolic factors and discusses recent advances in the regulation of the expressions of splice variants under the pathophysiological conditions of obesity. The potential of targeting the alternative mRNA mis-splicing for obesity-associated diseases therapies will also be discussed.
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20
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Petrovsky R, Krohne G, Großhans J. Overexpression of the lamina proteins Lamin and Kugelkern induces specific ultrastructural alterations in the morphology of the nuclear envelope of intestinal stem cells and enterocytes. Eur J Cell Biol 2018; 97:102-113. [PMID: 29395481 DOI: 10.1016/j.ejcb.2018.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 01/12/2018] [Accepted: 01/15/2018] [Indexed: 11/30/2022] Open
Abstract
The nuclear envelope has a stereotypic morphology consisting of a flat double layer of the inner and outer nuclear membrane, with interspersed nuclear pores. Underlying and tightly linked to the inner nuclear membrane is the nuclear lamina, a proteinous layer of intermediate filament proteins and associated proteins. Physiological, experimental or pathological alterations in the constitution of the lamina lead to changes in nuclear morphology, such as blebs and lobulations. It has so far remained unclear whether the morphological changes depend on the differentiation state and the specific lamina protein. Here we analysed the ultrastructural morphology of the nuclear envelope in intestinal stem cells and differentiated enterocytes in adult Drosophila flies, in which the proteins Lam, Kugelkern or a farnesylated variant of LamC were overexpressed. Surprisingly, we detected distinct morphological features specific for the respective protein. Lam induced envelopes with multiple layers of membrane and lamina, surrounding the whole nucleus whereas farnesylated LamC induced the formation of a thick fibrillary lamina. In contrast, Kugelkern induced single-layered and double-layered intranuclear membrane structures, which are likely be derived from infoldings of the inner nuclear membrane or of the double layer of the envelope.
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Affiliation(s)
- Roman Petrovsky
- Institute for Developmental Biochemistry, University of Göttingen, Justus-von-Liebig Weg 11, 37077, Göttingen, Germany
| | - Georg Krohne
- Division of Electron Microscopy, Biocenter, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jörg Großhans
- Institute for Developmental Biochemistry, University of Göttingen, Justus-von-Liebig Weg 11, 37077, Göttingen, Germany.
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21
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Liao CY, Anderson SS, Chicoine NH, Mayfield JR, Academia EC, Wilson JA, Pongkietisak C, Thompson MA, Lagmay EP, Miller DM, Hsu YM, McCormick MA, O'Leary MN, Kennedy BK. Rapamycin Reverses Metabolic Deficits in Lamin A/C-Deficient Mice. Cell Rep 2017; 17:2542-2552. [PMID: 27926859 DOI: 10.1016/j.celrep.2016.10.040] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 07/27/2016] [Accepted: 10/13/2016] [Indexed: 01/26/2023] Open
Abstract
The role of the mTOR inhibitor, rapamycin, in regulation of adiposity remains controversial. Here, we evaluate mTOR signaling in lipid metabolism in adipose tissues of Lmna-/- mice, a mouse model for dilated cardiomyopathy and muscular dystrophy. Lifespan extension by rapamycin is associated with increased body weight and fat content, two phenotypes we link to suppression of elevated energy expenditure. In both white and brown adipose tissue of Lmna-/- mice, we find that rapamycin inhibits mTORC1 but not mTORC2, leading to suppression of elevated lipolysis and restoration of thermogenic protein UCP1 levels, respectively. The short lifespan and metabolic phenotypes of Lmna-/- mice can be partially rescued by maintaining mice at thermoneutrality. Together, our findings indicate that altered mTOR signaling in Lmna-/- mice leads to a lipodystrophic phenotype that can be rescued with rapamycin, highlighting the effect of loss of adipose tissue in Lmna-/- mice and the consequences of altered mTOR signaling.
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Affiliation(s)
- Chen-Yu Liao
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Sydney S Anderson
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Nicole H Chicoine
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Jarrott R Mayfield
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Emmeline C Academia
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Joy A Wilson
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | | | - Morgan A Thompson
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Earl P Lagmay
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Delana M Miller
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Yueh-Mei Hsu
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Mark A McCormick
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Monique N O'Leary
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA
| | - Brian K Kennedy
- Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA.
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22
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A Tissue Engineered Blood Vessel Model of Hutchinson-Gilford Progeria Syndrome Using Human iPSC-derived Smooth Muscle Cells. Sci Rep 2017; 7:8168. [PMID: 28811655 PMCID: PMC5557922 DOI: 10.1038/s41598-017-08632-4] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 07/12/2017] [Indexed: 01/30/2023] Open
Abstract
Hutchison-Gilford Progeria Syndrome (HGPS) is a rare, accelerated aging disorder caused by nuclear accumulation of progerin, an altered form of the Lamin A gene. The primary cause of death is cardiovascular disease at about 14 years. Loss and dysfunction of smooth muscle cells (SMCs) in the vasculature may cause defects associated with HGPS. Due to limitations of 2D cell culture and mouse models, there is a need to develop improved models to discover novel therapeutics. To address this need, we produced a functional three-dimensional model of HGPS that replicates an arteriole-scale tissue engineered blood vessel (TEBV) using induced pluripotent stem cell (iPSC)-derived SMCs from an HGPS patient. To isolate the effect of the HGPS iSMCs, the endothelial layer consisted of human cord blood-derived endothelial progenitor cells (hCB-EPCs) from a separate, healthy donor. TEBVs fabricated from HGPS iSMCs and hCB-EPCs show reduced vasoactivity, increased medial wall thickness, increased calcification and apoptosis relative to TEBVs fabricated from normal iSMCs or primary MSCs. Additionally, treatment of HGPS TEBVs with the proposed therapeutic Everolimus, increases HGPS TEBV vasoactivity and increases iSMC differentiation in the TEBVs. These results show the ability of this iPSC-derived TEBV to reproduce key features of HGPS and respond to drugs.
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23
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Gullmets J, Torvaldson E, Lindqvist J, Imanishi SY, Taimen P, Meinander A, Eriksson JE. Internal epithelia in Drosophila display rudimentary competence to form cytoplasmic networks of transgenic human vimentin. FASEB J 2017; 31:5332-5341. [PMID: 28778974 DOI: 10.1096/fj.201700332r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/25/2017] [Indexed: 11/11/2022]
Abstract
Cytoplasmic intermediate filaments (cIFs) are found in all eumetazoans, except arthropods. To investigate the compatibility of cIFs in arthropods, we expressed human vimentin (hVim), a cIF with filament-forming capacity in vertebrate cells and tissues, transgenically in Drosophila Transgenic hVim could be recovered from whole-fly lysates by using a standard procedure for intermediate filament (IF) extraction. When this procedure was used to test for the possible presence of IF-like proteins in flies, only lamins and tropomyosin were observed in IF-enriched extracts, thereby providing biochemical reinforcement to the paradigm that arthropods lack cIFs. In Drosophila, transgenic hVim was unable to form filament networks in S2 cells and mesenchymal tissues; however, cage-like vimentin structures could be observed around the nuclei in internal epithelia, which suggests that Drosophila retains selective competence for filament formation. Taken together, our results imply that although the filament network formation competence is partially lost in Drosophila, a rudimentary filament network formation ability remains in epithelial cells. As a result of the observed selective competence for cIF assembly in Drosophila, we hypothesize that internal epithelial cIFs were the last cIFs to disappear from arthropods.-Gullmets, J., Torvaldson, E., Lindqvist, J., Imanishi, S. Y., Taimen, P., Meinander, A., Eriksson, J. E. Internal epithelia in Drosophila display rudimentary competence to form cytoplasmic networks of transgenic human vimentin.
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Affiliation(s)
- Josef Gullmets
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland.,Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland.,Department of Pathology, University of Turku and Turku University Hospital, Turku, Finland.,MediCity Research Laboratory, Turku, Finland
| | - Elin Torvaldson
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland.,Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland
| | - Julia Lindqvist
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland.,Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland
| | - Susumu Y Imanishi
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland
| | - Pekka Taimen
- Department of Pathology, University of Turku and Turku University Hospital, Turku, Finland.,MediCity Research Laboratory, Turku, Finland
| | - Annika Meinander
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - John E Eriksson
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland; .,Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland
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24
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Abstract
Epidemiological studies have shown that ageing is a major non-reversible risk factor for cardiovascular disease. Vascular ageing starts early in life and is characterized by a gradual change of vascular structure and function resulting in increased arterial stiffening. At the present review we discuss the role of the most important molecular pathways involved in vascular ageing, their association with arterial stiffening and possible novel therapeutic targets that may delay this otherwise irreversible degenerating process. Specifically, we discuss the role of oxidative stress, telomere shortening, and ubiquitin proteasome system in endothelial cell senescence and dysfunction in vascular inflammation and in arterial stiffening. Further, we summarize the most important molecular mechanisms regulating vascular ageing including sirtuin 1, telomerase, klotho, JunD, and amyloid beta 1-40 peptide.
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Affiliation(s)
- Ageliki Laina
- Department of Clinical Therapeutics, Alexandra Hospital, University of Athens, Athens, Greece
| | - Konstantinos Stellos
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany; Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany; German Center of Cardiovascular Research (Deutsches Zentrum für Herz-Kreislaufforschung; DZHK), Rhein-Main Partner Site, Frankfurt, Germany
| | - Kimon Stamatelopoulos
- Department of Clinical Therapeutics, Alexandra Hospital, University of Athens, Athens, Greece.
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25
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Distinct Fiber Type Signature in Mouse Muscles Expressing a Mutant Lamin A Responsible for Congenital Muscular Dystrophy in a Patient. Cells 2017; 6:cells6020010. [PMID: 28441765 PMCID: PMC5492014 DOI: 10.3390/cells6020010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 04/14/2017] [Accepted: 04/20/2017] [Indexed: 01/21/2023] Open
Abstract
Specific mutations in LMNA, which encodes nuclear intermediate filament proteins lamins A/C, affect skeletal muscle tissues. Early-onset LMNA myopathies reveal different alterations of muscle fibers, including fiber type disproportion or prominent dystrophic and/or inflammatory changes. Recently, we identified the p.R388P LMNA mutation as responsible for congenital muscular dystrophy (L-CMD) and lipodystrophy. Here, we asked whether viral-mediated expression of mutant lamin A in murine skeletal muscles would be a pertinent model to reveal specific muscle alterations. We found that the total amount and size of muscle fibers as well as the extent of either inflammation or muscle regeneration were similar to wildtype or mutant lamin A. In contrast, the amount of fast oxidative muscle fibers containing myosin heavy chain IIA was lower upon expression of mutant lamin A, in correlation with lower expression of genes encoding transcription factors MEF2C and MyoD. These data validate this in vivo model for highlighting distinct muscle phenotypes associated with different lamin contexts. Additionally, the data suggest that alteration of muscle fiber type identity may contribute to the mechanisms underlying physiopathology of L-CMD related to R388P mutant lamin A.
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26
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Dorado B, Andrés V. A-type lamins and cardiovascular disease in premature aging syndromes. Curr Opin Cell Biol 2017; 46:17-25. [PMID: 28086161 DOI: 10.1016/j.ceb.2016.12.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/14/2016] [Accepted: 12/21/2016] [Indexed: 01/17/2023]
Abstract
Lamin A is a nuclear intermediate filament protein with important structural and regulatory roles in most differentiated mammalian cells. Excessive accumulation of its precursor prelamin A or the mutant form called 'progerin' causes premature aging syndromes. Progeroid 'laminopathies' are characterized by severe cardiovascular problems (cardiac electrical defects, vascular calcification and stiffening, atherosclerosis, myocardial infarction, and stroke) and premature death. Here, we review studies in cell and mouse models and patients that are unraveling how abnormal prelamin A and progerin accumulation accelerates cardiovascular disease and aging. This knowledge is essential for developing effective therapies to treat progeria and may help identify new mechanisms underlying normal aging.
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Affiliation(s)
- Beatriz Dorado
- Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), CIBER de Enfermedades Cardiovasculares, Madrid, Spain
| | - Vicente Andrés
- Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), CIBER de Enfermedades Cardiovasculares, Madrid, Spain.
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27
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Zhang H, Sun L, Wang K, Wu D, Trappio M, Witting C, Cao K. Loss of H3K9me3 Correlates with ATM Activation and Histone H2AX Phosphorylation Deficiencies in Hutchinson-Gilford Progeria Syndrome. PLoS One 2016; 11:e0167454. [PMID: 27907109 PMCID: PMC5131972 DOI: 10.1371/journal.pone.0167454] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/14/2016] [Indexed: 12/20/2022] Open
Abstract
Compelling evidence suggests that defective DNA damage response (DDR) plays a key role in the premature aging phenotypes in Hutchinson-Gilford progeria syndrome (HGPS). Studies document widespread alterations in histone modifications in HGPS cells, especially, the global loss of histone H3 trimethylated on lysine 9 (H3K9me3). In this study, we explore the potential connection(s) between H3K9me3 loss and the impaired DDR in HGPS. When cells are exposed to a DNA-damaging agent Doxorubicin (Dox), double strand breaks (DSBs) are generated that result in the phosphorylation of histone H2A variant H2AX (gammaH2AX) within an hour. We find that the intensities of gammaH2AX foci appear significantly weaker in the G0/G1 phase HGPS cells compared to control cells. This reduction is associated with a delay in the recruitment of essential DDR factors. We further demonstrate that ataxia-telangiectasia mutated (ATM) is responsible for the amplification of gammaH2AX signals at DSBs during G0/G1 phase, and its activation is inhibited in the HGPS cells that display significant loss of H3K9me3. Moreover, methylene (MB) blue treatment, which is known to save heterochromatin loss in HGPS, restores H3K9me3, stimulates ATM activity, increases gammaH2AX signals and rescues deficient DDR. In summary, this study demonstrates an early DDR defect of attenuated gammaH2AX signals in G0/G1 phase HGPS cells and provides a plausible connection between H3K9me3 loss and DDR deficiency.
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Affiliation(s)
- Haoyue Zhang
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, United States of America
| | - Linlin Sun
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, United States of America
| | - Kun Wang
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, United States of America
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, MD, United States of America
| | - Di Wu
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, United States of America
| | - Mason Trappio
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, United States of America
| | - Celeste Witting
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, United States of America
| | - Kan Cao
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, United States of America
- * E-mail:
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28
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Cardiac electrical defects in progeroid mice and Hutchinson-Gilford progeria syndrome patients with nuclear lamina alterations. Proc Natl Acad Sci U S A 2016; 113:E7250-E7259. [PMID: 27799555 DOI: 10.1073/pnas.1603754113] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a rare genetic disease caused by defective prelamin A processing, leading to nuclear lamina alterations, severe cardiovascular pathology, and premature death. Prelamin A alterations also occur in physiological aging. It remains unknown how defective prelamin A processing affects the cardiac rhythm. We show age-dependent cardiac repolarization abnormalities in HGPS patients that are also present in the Zmpste24-/- mouse model of HGPS. Challenge of Zmpste24-/- mice with the β-adrenergic agonist isoproterenol did not trigger ventricular arrhythmia but caused bradycardia-related premature ventricular complexes and slow-rate polymorphic ventricular rhythms during recovery. Patch-clamping in Zmpste24-/- cardiomyocytes revealed prolonged calcium-transient duration and reduced sarcoplasmic reticulum calcium loading and release, consistent with the absence of isoproterenol-induced ventricular arrhythmia. Zmpste24-/- progeroid mice also developed severe fibrosis-unrelated bradycardia and PQ interval and QRS complex prolongation. These conduction defects were accompanied by overt mislocalization of the gap junction protein connexin43 (Cx43). Remarkably, Cx43 mislocalization was also evident in autopsied left ventricle tissue from HGPS patients, suggesting intercellular connectivity alterations at late stages of the disease. The similarities between HGPS patients and progeroid mice reported here strongly suggest that defective cardiac repolarization and cardiomyocyte connectivity are important abnormalities in the HGPS pathogenesis that increase the risk of arrhythmia and premature death.
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29
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Kõks S, Dogan S, Tuna BG, González-Navarro H, Potter P, Vandenbroucke RE. Mouse models of ageing and their relevance to disease. Mech Ageing Dev 2016; 160:41-53. [PMID: 27717883 DOI: 10.1016/j.mad.2016.10.001] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 09/26/2016] [Accepted: 10/03/2016] [Indexed: 12/28/2022]
Abstract
Ageing is a process that gradually increases the organism's vulnerability to death. It affects different biological pathways, and the underlying cellular mechanisms are complex. In view of the growing disease burden of ageing populations, increasing efforts are being invested in understanding the pathways and mechanisms of ageing. We review some mouse models commonly used in studies on ageing, highlight the advantages and disadvantages of the different strategies, and discuss their relevance to disease susceptibility. In addition to addressing the genetics and phenotypic analysis of mice, we discuss examples of models of delayed or accelerated ageing and their modulation by caloric restriction.
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Affiliation(s)
- Sulev Kõks
- University of Tartu, Tartu, Estonia and Estonian University of Life Sciences, Tartu, Estonia.
| | - Soner Dogan
- Yeditepe University, School of Medicine, Department of Medical Biology, Istanbul, Turkey.
| | - Bilge Guvenc Tuna
- Yeditepe University, School of Medicine, Department of Biophysics, Istanbul, Turkey.
| | - Herminia González-Navarro
- Institute of Health Research-INCLIVA, 46010 Valencia, Spain and CIBER de Diabetes y Enfermedades Metabólicas (CIBERDEM), 28029 Madrid, Spain.
| | - Paul Potter
- Mammalian Genetics Unit, MRC Harwell, Oxfordshire, UK.
| | - Roosmarijn E Vandenbroucke
- Inflammation Research Center, VIB, Ghent, Belgium, Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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30
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Gordon LB, Kieran MW, Kleinman ME, Misteli T. The decision-making process and criteria in selecting candidate drugs for progeria clinical trials. EMBO Mol Med 2016; 8:685-7. [PMID: 27234439 PMCID: PMC4931284 DOI: 10.15252/emmm.201606280] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Hutchinson–Gilford progeria syndrome (progeria) is an extremely rare premature aging disease with a population prevalence of 1 in 20 million. Nevertheless, propelled by the discovery of a causal mutation in the lamin A/C gene (LMNA) (De Sandre‐Giovannoli et al, 2003; Eriksson et al, 2003) and strong patient advocacy (Gordon & Gordon, 2014), progeria has rapidly become a vibrant field of study, attracting a wide range of researchers from basic cell biologists to clinicians.
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Affiliation(s)
- Leslie B Gordon
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA Department of Pediatrics, Hasbro Children's Hospital and Warren Alpert Medical School of Brown University, Providence, RI, USA
| | - Mark W Kieran
- Dana-Farber Boston Children's Cancer and Blood Disorder Center, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Monica E Kleinman
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA
| | - Tom Misteli
- National Cancer Institute, NIH, Bethesda, MD, USA
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31
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Muchir A, Worman HJ. Targeting Mitogen-Activated Protein Kinase Signaling in Mouse Models of Cardiomyopathy Caused by Lamin A/C Gene Mutations. Methods Enzymol 2015; 568:557-80. [PMID: 26795484 DOI: 10.1016/bs.mie.2015.07.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The most frequently occurring mutations in the gene encoding nuclear lamin A and nuclear lamin C cause striated muscle diseases virtually always involving the heart. In this review, we describe the approaches and methods used to discover that cardiomyopathy-causing lamin A/C gene mutations increase MAP kinase signaling in the heart and that this plays a role in disease pathogenesis. We review different mouse models of cardiomyopathy caused by lamin A/C gene mutations and how transcriptomic analysis of one model identified increased cardiac activity of the ERK1/2, JNK, and p38α MAP kinases. We describe methods used to measure the activity of these MAP kinases in mouse hearts and then discuss preclinical treatment protocols using pharmacological inhibitors to demonstrate their role in pathogenesis. Several of these kinase inhibitors are in clinical development and could potentially be used to treat human subjects with cardiomyopathy caused by lamin A/C gene mutations.
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Affiliation(s)
- Antoine Muchir
- Center of Research in Myology, UPMC-Inserm UMR974, CNRS FRE3617, Institut de Myologie, G.H. Pitie Salpetriere, Paris Cedex, France
| | - Howard J Worman
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, USA; Department of Pathology and Cell Biology, College of Physicians and Surgeons, Columbia University, New York, USA.
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32
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Abstract
Recent studies show that nuclear lamins, the type V intermediate filament proteins, are required for proper building of at least some organs. As the major structural components of the nuclear lamina found underneath the inner nuclear membranes, lamins are ubiquitously expressed in all animal cells. How the broadly expressed lamins support the building of specific tissues is not understood. By studying Drosophila testis, we have uncovered a mechanism by which lamin-B functions in the cyst stem cell (CySC) and its differentiated cyst cell, the cell types known to form the niche/microenvironment for the germline stem cells (GSC) and the developing germ line, to ensure testis organogenesis (1). In this extra view, we discuss some remaining questions and the implications of our findings in the understanding of how the ubiquitous nuclear lamina regulates tissue building in a context-dependent manner.
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Affiliation(s)
- Haiyang Chen
- a Department of Embryology; Carnegie Institution for Science; Baltimore, MD USA
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33
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Infante A, Rodríguez CI. Pathologically Relevant Prelamin A Interactions with Transcription Factors. Methods Enzymol 2015; 569:485-501. [PMID: 26778572 DOI: 10.1016/bs.mie.2015.08.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
LMNA-linked laminopathies are a group of rare human diseases caused by mutations in LMNA or by disrupted posttranslational processing of its largest encoded isoform, prelamin A. The accumulation of mutated or immature forms of farnesylated prelamin A, named progerin or prelamin A, respectively, dominantly disrupts nuclear lamina structure with toxic effects in cells. One hypothesis is that aberrant lamin filament networks disrupt or "trap" proteins such as transcription factors, thereby interfering with their normal activity. Since laminopathies mainly affect tissues of mesenchymal origin, we tested this hypothesis by generating an experimental model of laminopathy by inducing prelamin A accumulation in human mesenchymal stem cells (hMSCs). We provide detailed protocols for inducing and detecting prelamin A accumulation in hMSCs, and describe the bioinformatic analysis and in vitro assays of transcription factors potentially affected by prelamin A accumulation.
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Affiliation(s)
- Arantza Infante
- Stem Cells and Cell Therapy Laboratory, BioCruces Health Research Institute, Cruces University Hospital, Barakaldo, Spain
| | - Clara I Rodríguez
- Stem Cells and Cell Therapy Laboratory, BioCruces Health Research Institute, Cruces University Hospital, Barakaldo, Spain.
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Brassard JA, Fekete N, Garnier A, Hoesli CA. Hutchinson-Gilford progeria syndrome as a model for vascular aging. Biogerontology 2015; 17:129-45. [PMID: 26330290 DOI: 10.1007/s10522-015-9602-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Accepted: 08/24/2015] [Indexed: 01/03/2023]
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a premature aging disorder caused by a de novo genetic mutation that leads to the accumulation of a splicing isoform of lamin A termed progerin. Progerin expression alters the organization of the nuclear lamina and chromatin. The life expectancy of HGPS patients is severely reduced due to critical cardiovascular defects. Progerin also accumulates in an age-dependent manner in the vascular cells of adults that do not carry genetic mutations associated with HGPS. The molecular mechanisms that lead to vascular dysfunction in HGPS may therefore also play a role in vascular aging. The vascular phenotypic and molecular changes observed in HGPS are strikingly similar to those seen with age, including increased senescence, altered mechanotransduction and stem cell exhaustion. This article discusses the similarities and differences between age-dependent and HGPS-related vascular aging to highlight the relevance of HGPS as a model for vascular aging. Induced pluripotent stem cells derived from HGPS patients are suggested as an attractive model to study vascular aging in order to develop novel approaches to treat cardiovascular disease.
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Affiliation(s)
- Jonathan A Brassard
- Department of Chemical Engineering, McGill University, Wong Building, 3610 University Street, Montréal, QC, H3A 0C5, Canada.,Department of Chemical Engineering, Université Laval, 1065 Avenue de la Médecine, Québec, QC, G1V 0A6, Canada
| | - Natalie Fekete
- Department of Chemical Engineering, McGill University, Wong Building, 3610 University Street, Montréal, QC, H3A 0C5, Canada
| | - Alain Garnier
- Department of Chemical Engineering, Université Laval, 1065 Avenue de la Médecine, Québec, QC, G1V 0A6, Canada
| | - Corinne A Hoesli
- Department of Chemical Engineering, McGill University, Wong Building, 3610 University Street, Montréal, QC, H3A 0C5, Canada.
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Gonzalo S, Kreienkamp R. DNA repair defects and genome instability in Hutchinson-Gilford Progeria Syndrome. Curr Opin Cell Biol 2015; 34:75-83. [PMID: 26079711 DOI: 10.1016/j.ceb.2015.05.007] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 05/27/2015] [Accepted: 05/29/2015] [Indexed: 12/11/2022]
Abstract
The integrity of the nuclear lamina has emerged as an important factor in the maintenance of genome stability. In particular, mutations in the LMNA gene, encoding A-type lamins (lamin A/C), alter nuclear morphology and function, and cause genomic instability. LMNA gene mutations are associated with a variety of degenerative diseases and devastating premature aging syndromes such as Hutchinson-Gilford Progeria Syndrome (HGPS) and Restrictive Dermopathy (RD). HGPS is a severe laminopathy, with patients dying in their teens from myocardial infarction or stroke. HGPS patient-derived cells exhibit nuclear shape abnormalities, changes in epigenetic regulation and gene expression, telomere shortening, genome instability, and premature senescence. This review highlights recent advances in identifying molecular mechanisms that contribute to the pathophysiology of HGPS, with a special emphasis on DNA repair defects and genome instability.
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Affiliation(s)
- Susana Gonzalo
- Edward A. Doisy Department of Biochemistry and Molecular Biology, St Louis University School of Medicine, St. Louis, MO 63104, USA.
| | - Ray Kreienkamp
- Edward A. Doisy Department of Biochemistry and Molecular Biology, St Louis University School of Medicine, St. Louis, MO 63104, USA
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Gruenbaum Y, Foisner R. Lamins: nuclear intermediate filament proteins with fundamental functions in nuclear mechanics and genome regulation. Annu Rev Biochem 2015; 84:131-64. [PMID: 25747401 DOI: 10.1146/annurev-biochem-060614-034115] [Citation(s) in RCA: 354] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Lamins are intermediate filament proteins that form a scaffold, termed nuclear lamina, at the nuclear periphery. A small fraction of lamins also localize throughout the nucleoplasm. Lamins bind to a growing number of nuclear protein complexes and are implicated in both nuclear and cytoskeletal organization, mechanical stability, chromatin organization, gene regulation, genome stability, differentiation, and tissue-specific functions. The lamin-based complexes and their specific functions also provide insights into possible disease mechanisms for human laminopathies, ranging from muscular dystrophy to accelerated aging, as observed in Hutchinson-Gilford progeria and atypical Werner syndromes.
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Affiliation(s)
- Yosef Gruenbaum
- Department of Genetics, Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Jerusalem 91904, Israel;
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Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is an extremely rare, uniformly fatal, segmental "premature aging" disease in which children exhibit phenotypes that may give us insights into the aging process at both the cellular and organismal levels. Initial presentation in early childhood is primarily based on growth and dermatologic findings. Primary morbidity and mortality for children with HGPS is from atherosclerotic cardiovascular disease and strokes with death occurring at an average age of 14.6 years. There is increasing data to support a unique phenotype of the craniofacial and cerebrovascular anatomy that accompanies the premature aging process. Strokes in HGPS can occur downstream of carotid artery and/or vertebral artery occlusion, stenosis, and calcification, with prominent collateral vessel formation. Both large and small vessel disease are present, and strokes are often clinically silent. Despite the presence of multisystem premature aging, children with HGPS do not appear to have cognitive deterioration, suggesting that some aspects of brain function may be protected from the deleterious effects of progerin, the disease-causing protein. Based on limited autopsy material, there is no pathologic evidence of dementia or Alzheimer-type changes. In a transgenic mouse model of progeria with expression of the most common HGPS mutation in brain, skin, bone, and heart, there are distortions of neuronal nuclei at the ultrastructural level with irregular shape and severe invaginations, but no evidence of inclusions or aberrant tau in brain sections. Importantly, the nuclear distortions did not result in significant changes in gene expression in hippocampal neurons. This chapter will discuss both preclinical and clinical aspects of the genetics, pathobiology, clinical phenotype, clinical care, and treatment of HGPS, with special attention toward neurologic and cutaneous findings.
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Affiliation(s)
- Nicole J Ullrich
- Department of Neurology, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA
| | - Leslie B Gordon
- Department of Anesthesia, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA; Department of Pediatrics, Hasbro Children's Hospital and Warren Alpert Medical School of Brown University, Providence, RI, USA; Progeria Research Foundation, Peabody, MA, USA.
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Wang K, Das A, Xiong ZM, Cao K, Hannenhalli S. Phenotype-Dependent Coexpression Gene Clusters: Application to Normal and Premature Ageing. IEEE/ACM TRANSACTIONS ON COMPUTATIONAL BIOLOGY AND BIOINFORMATICS 2015; 12:30-39. [PMID: 26357076 PMCID: PMC5562542 DOI: 10.1109/tcbb.2014.2359446] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Hutchinson Gilford progeria syndrome (HGPS) is a rare genetic disease with symptoms of aging at a very early age. Its molecular basis is not entirely clear, although profound gene expression changes have been reported, and there are some known and other presumed overlaps with normal aging process. Identification of genes with agingor HGPS-associated expression changes is thus an important problem. However, standard regression approaches are currently unsuitable for this task due to limited sample sizes, thus motivating development of alternative approaches. Here, we report a novel iterative multiple regression approach that leverages co-expressed gene clusters to identify gene clusters whose expression co-varies with age and/or HGPS. We have applied our approach to novel RNA-seq profiles in fibroblast cell cultures at three different cellular ages, both from HGPS patients and normal samples. After establishing the robustness of our approach, we perform a comparative investigation of biological processes underlying normal aging and HGPS. Our results recapitulate previously known processes underlying aging as well as suggest numerous unique processes underlying aging and HGPS. The approach could also be useful in detecting phenotype-dependent co-expression gene clusters in other contexts with limited sample sizes.
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Viceconte N, McKenna T, Eriksson M. Low levels of the reverse transactivator fail to induce target transgene expression in vascular smooth muscle cells. PLoS One 2014; 9:e104098. [PMID: 25090270 PMCID: PMC4121313 DOI: 10.1371/journal.pone.0104098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Accepted: 07/10/2014] [Indexed: 11/18/2022] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a genetic disease with multiple features that are suggestive of premature aging. Most patients with HGPS carry a mutation on one of their copies of the LMNA gene. The LMNA gene encodes the lamin A and lamin C proteins, which are the major proteins of the nuclear lamina. The organs of the cardiovascular system are amongst those that are most severely affected in HGPS, undergoing a progressive depletion of vascular smooth muscle cells, and most children with HGPS die in their early teens from cardio-vascular disease and other complications from atherosclerosis. In this study, we developed a transgenic mouse model based on the tet-ON system to increase the understanding of the molecular mechanisms leading to the most lethal aspect of HGPS. To induce the expression of the most common HGPS mutation, LMNA c.1824C>T; p.G608G, in the vascular smooth muscle cells of the aortic arch and thoracic aorta, we used the previously described reverse tetracycline-controlled transactivator, sm22α-rtTA. However, the expression of the reverse sm22α-transactivator was barely detectable in the arteries, and this low level of expression was not sufficient to induce the expression of the target human lamin A minigene. The results from this study are important because they suggest caution during the use of previously functional transgenic animal models and emphasize the importance of assessing transgene expression over time.
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Affiliation(s)
- Nikenza Viceconte
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, Novum, Huddinge, Sweden
| | - Tomás McKenna
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, Novum, Huddinge, Sweden
| | - Maria Eriksson
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, Novum, Huddinge, Sweden
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Fedorchak GR, Kaminski A, Lammerding J. Cellular mechanosensing: getting to the nucleus of it all. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2014; 115:76-92. [PMID: 25008017 PMCID: PMC4252489 DOI: 10.1016/j.pbiomolbio.2014.06.009] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 06/28/2014] [Indexed: 12/12/2022]
Abstract
Cells respond to mechanical forces by activating specific genes and signaling pathways that allow the cells to adapt to their physical environment. Examples include muscle growth in response to exercise, bone remodeling based on their mechanical load, or endothelial cells aligning under fluid shear stress. While the involved downstream signaling pathways and mechanoresponsive genes are generally well characterized, many of the molecular mechanisms of the initiating 'mechanosensing' remain still elusive. In this review, we discuss recent findings and accumulating evidence suggesting that the cell nucleus plays a crucial role in cellular mechanotransduction, including processing incoming mechanoresponsive signals and even directly responding to mechanical forces. Consequently, mutations in the involved proteins or changes in nuclear envelope composition can directly impact mechanotransduction signaling and contribute to the development and progression of a variety of human diseases, including muscular dystrophy, cancer, and the focus of this review, dilated cardiomyopathy. Improved insights into the molecular mechanisms underlying nuclear mechanotransduction, brought in part by the emergence of new technologies to study intracellular mechanics at high spatial and temporal resolution, will not only result in a better understanding of cellular mechanosensing in normal cells but may also lead to the development of novel therapies in the many diseases linked to defects in nuclear envelope proteins.
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Affiliation(s)
- Gregory R Fedorchak
- Department of Biomedical Engineering, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853, USA
| | - Ashley Kaminski
- Department of Biomedical Engineering, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853, USA
| | - Jan Lammerding
- Department of Biomedical Engineering, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853, USA.
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Ghosh S, Zhou Z. Genetics of aging, progeria and lamin disorders. Curr Opin Genet Dev 2014; 26:41-6. [DOI: 10.1016/j.gde.2014.05.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 03/11/2014] [Accepted: 05/26/2014] [Indexed: 12/19/2022]
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Stroud MJ, Banerjee I, Veevers J, Chen J. Linker of nucleoskeleton and cytoskeleton complex proteins in cardiac structure, function, and disease. Circ Res 2014; 114:538-48. [PMID: 24481844 DOI: 10.1161/circresaha.114.301236] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The linker of nucleoskeleton and cytoskeleton (LINC) complex, composed of proteins within the inner and the outer nuclear membranes, connects the nuclear lamina to the cytoskeleton. The importance of this complex has been highlighted by the discovery of mutations in genes encoding LINC complex proteins, which cause skeletal or cardiac myopathies. Herein, this review summarizes structure, function, and interactions of major components of the LINC complex, highlights how mutations in these proteins may lead to cardiac disease, and outlines future challenges in the field.
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Affiliation(s)
- Matthew J Stroud
- From the Department of Cardiology, University of California San Diego School of Medicine, La Jolla, CA
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Wu D, Flannery AR, Cai H, Ko E, Cao K. Nuclear localization signal deletion mutants of lamin A and progerin reveal insights into lamin A processing and emerin targeting. Nucleus 2014; 5:66-74. [PMID: 24637396 PMCID: PMC4028357 DOI: 10.4161/nucl.28068] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Lamin A is a major component of the lamina, which creates a dynamic network underneath the nuclear envelope. Mutations in the lamin A gene (LMNA) cause severe genetic disorders, one of which is Hutchinson-Gilford progeria syndrome (HGPS), a disease triggered by a dominant mutant named progerin. Unlike the wild-type lamin A, whose farnesylated C-terminus is excised during post-translational processing, progerin retains its farnesyl tail and accumulates on the nuclear membrane, resulting in abnormal nuclear morphology during interphase. In addition, membrane-associated progerin forms visible cytoplasmic aggregates in mitosis. To examine the potential effects of cytoplasmic progerin, nuclear localization signal (NLS) deleted progerin and lamin A (PGΔNLS and LAΔNLS, respectively) have been constructed. We find that both ΔNLS mutants are farnesylated in the cytosol and associate with a sub-domain of the ER via their farnesyl tails. While the farnesylation on LAΔNLS can be gradually removed, which leads to its subsequent release from the ER into the cytoplasm, PGΔNLS remains permanently farnesylated and membrane-bounded. Moreover, both ΔNLS mutants dominantly affect emerin’s nuclear localization. These results reveal new insights into lamin A biogenesis and lamin A-emerin interaction.
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Affiliation(s)
- Di Wu
- Department of Cell Biology and Molecular Genetics; University of Maryland; College Park, MD USA
| | - Andrew R Flannery
- Department of Cell Biology and Molecular Genetics; University of Maryland; College Park, MD USA
| | - Helen Cai
- Department of Cell Biology and Molecular Genetics; University of Maryland; College Park, MD USA
| | - Eunae Ko
- Department of Cell Biology and Molecular Genetics; University of Maryland; College Park, MD USA
| | - Kan Cao
- Department of Cell Biology and Molecular Genetics; University of Maryland; College Park, MD USA
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Wazir U, Ahmed MH, Bridger JM, Harvey A, Jiang WG, Sharma AK, Mokbel K. The clinicopathological significance of lamin A/C, lamin B1 and lamin B receptor mRNA expression in human breast cancer. Cell Mol Biol Lett 2013; 18:595-611. [PMID: 24293108 PMCID: PMC6275779 DOI: 10.2478/s11658-013-0109-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 11/25/2013] [Indexed: 12/26/2022] Open
Abstract
Lamin A/C (LMNA), lamin B1 (LMNB1) and lamin B receptor (LBR) have key roles in nuclear structural integrity and chromosomal stability. In this study, we have studied the relationships between the mRNA expressions of A-type lamins, LMNB1 and LBR and the clinicopathological parameters in human breast cancer. Samples of breast cancer tissues (n = 115) and associated non-cancerous tissue (ANCT; n = 30) were assessed using reverse transcription and quantitative PCR. Transcript levels were correlated with clinicopathological data. Higher levels of A-type lamins and LMNB1 mRNA expression were seen in ANCT. Higher lamin A/C expression was associated with the early clinical stage (TNM1 vs. TNM3 - 13 vs. 0.21; p = 0.0515), with better clinical outcomes (disease-free survival vs. mortality - 11 vs. 1; p = 0.0326), and with better overall (p = 0.004) and disease-free survival (p = 0.062). The expression of LMNB1 declined with worsening clinical outcome (disease-free vs. mortalities - 0.0011 vs. 0.000; p = 0.0177). LBR mRNA expression was directly associated with tumor grade (grade 1 vs. grade 3 - 0.00 vs. 0.00; p = 0.0479) and Nottingham Prognostic Index (NPI1 vs. NPI3 - 0.00 vs. 0.00; p = 0.0551). To the best of our knowledge, this is the first study to suggest such a role for A-type lamins, lamin B1 and LBR in human breast cancer, identifying an important area for further research.
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Affiliation(s)
- Umar Wazir
- The London Breast Institute, Princess Grace Hospital, London, UK
- Department of Breast Surgery, St. George’s Hospital and Medical School, University of London, London, UK
| | - Mai Hassan Ahmed
- Centre for Cell & Chromosome Biology, Uxbridge, London, UK
- Brunel Institute for Cancer Genetics and Pharmacogenomics, School of Health Sciences and Social Care, Brunel University, Uxbridge, London, UK
| | | | - Amanda Harvey
- Brunel Institute for Cancer Genetics and Pharmacogenomics, School of Health Sciences and Social Care, Brunel University, Uxbridge, London, UK
| | - Wen G. Jiang
- Metastasis and Angiogenesis Research Group, University Department of Surgery, Cardiff University School of Medicine, Cardiff University, Cardiff, Wales, UK
| | - Anup K. Sharma
- The London Breast Institute, Princess Grace Hospital, London, UK
| | - Kefah Mokbel
- London Breast Institute, the Princess Grace Hospital, 45 Nottingham Place, London, W1U 5NY UK
- The London Breast Institute, Princess Grace Hospital, London, UK
- Department of Breast Surgery, St. George’s Hospital and Medical School, University of London, London, UK
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Das A, Grotsky DA, Neumann MA, Kreienkamp R, Gonzalez-Suarez I, Redwood AB, Kennedy BK, Stewart CL, Gonzalo S. Lamin A Δexon9 mutation leads to telomere and chromatin defects but not genomic instability. Nucleus 2013; 4:410-9. [PMID: 24153156 DOI: 10.4161/nucl.26873] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Over 300 mutations in the LMNA gene, encoding A-type lamins, are associated with 15 human degenerative disorders and premature aging syndromes. Although genomic instability seems to contribute to the pathophysiology of some laminopathies, there is limited information about what mutations cause genomic instability and by which molecular mechanisms. Mouse embryonic fibroblasts depleted of A-type lamins or expressing mutants lacking exons 8-11 (Lmna(Δ8-11/Δ8-11)) exhibit alterations in telomere biology and DNA repair caused by cathepsin L-mediated degradation of 53BP1 and reduced expression of BRCA1 and RAD51. Thus, a region encompassing exons 8-11 seems essential for genome integrity. Given that deletion of lamin A exon 9 in the mouse (Lmna(Δ9/Δ9)) results in a progeria phenotype, we tested if this domain is important for genome integrity. Lmna(Δ9/Δ9) MEFs exhibit telomere shortening and heterochromatin alterations but do not activate cathepsin L-mediated degradation of 53BP1 and maintain expression of BRCA1 and RAD51. Accordingly, Lmna(Δ9/Δ9) MEFs do not present genomic instability, and expression of mutant lamin A Δexon9 in lamin-depleted cells restores DNA repair factors levels and partially rescues nuclear abnormalities. These data reveal that the domain encoded by exon 9 is important to maintain telomere homeostasis and heterochromatin structure but does not play a role in DNA repair, thus pointing to other exons in the lamin A tail as responsible for the genomic instability phenotype in Lmna(Δ8-11/Δ8-11) mice. Our study also suggests that the levels of DNA repair factors 53BP1, BRCA1 and RAD51 could potentially serve as biomarkers to identify laminopathies that present with genomic instability.
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Affiliation(s)
- Arindam Das
- Edward A Doisy Department of Biochemistry and Molecular Biology; School of Medicine; St Louis University; St Louis, MO USA; Departments of Radiation Oncology and Cell Biology & Physiology; School of Medicine; Washington University; St Louis, MO USA; Buck Institute for Research on Aging; Novato, CA USA; Institute of Medical Biology; Biopolis; Singapore
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Stochaj U, Kodiha M, Shum-Tim D, Colmegna I. Implications of multipotent mesenchymal stromal cell aging. Regen Med 2013; 8:211-22. [PMID: 23477400 DOI: 10.2217/rme.13.10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Aging is defined as the progressive and generalized impairment of function, resulting in an increasing vulnerability to environmental challenges and a growing risk of disease and death. The decline in the regenerative capacity of resident stem cells across different tissues is a central mediator of aging. In this paper we review the evidence implicating multipotent mesenchymal stromal cells as being subject to and causes of tissue and organismal aging. We specifically discuss the nuclear changes that occur in the context of Hutchinson-Gilford progeria syndrome, a premature aging syndrome that preferentially affects tissues of mesenchymal origin.
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Affiliation(s)
- Ursula Stochaj
- Department of Physiology, McGill University, McIntyre Medical Sciences Building, Room 1115, 3655 Promenade Sir William Osler, Montréal, Québec H3G 1Y6, Canada
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Schreiber KH, Kennedy BK. When lamins go bad: nuclear structure and disease. Cell 2013; 152:1365-75. [PMID: 23498943 DOI: 10.1016/j.cell.2013.02.015] [Citation(s) in RCA: 240] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Indexed: 12/17/2022]
Abstract
Mutations in nuclear lamins or other proteins of the nuclear envelope are the root cause of a group of phenotypically diverse genetic disorders known as laminopathies, which have symptoms that range from muscular dystrophy to neuropathy to premature aging syndromes. Although precise disease mechanisms remain unclear, there has been substantial progress in our understanding of not only laminopathies, but also the biological roles of nuclear structure. Nuclear envelope dysfunction is associated with altered nuclear activity, impaired structural dynamics, and aberrant cell signaling. Building on these findings, small molecules are being discovered that may become effective therapeutic agents.
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Xiong ZM, LaDana C, Wu D, Cao K. An inhibitory role of progerin in the gene induction network of adipocyte differentiation from iPS cells. Aging (Albany NY) 2013; 5:288-303. [PMID: 23596277 PMCID: PMC3651521 DOI: 10.18632/aging.100550] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 04/10/2013] [Indexed: 12/30/2022]
Abstract
Lipodystrophies, characterized by partial or complete loss of adipose tissue, have been associated with mutations in the lamin A gene. It remains unclear how lamin A mutants interfere with adipose tissue formation. Hutchinson-Gilford progeria syndrome (HGPS) presents the most severe form of lamin A-associated diseases, whose patients show a complete loss of subcutaneous fat. Using iPSCs reprogrammed from HGPS fibroblasts, we induced adipocyte formation from iPSC derived embryoid bodies or from iPSC derived mesenchymal stem cells. Both approaches revealed a severe lipid storage defect in HGPS cells at late differentiation stage, faithfully recapitulating HGPS patient phenotype. Expression analysis further indicated that progerin inhibited the transcription activation of PPARγ2 and C/EBPα, but had little effects on the early adipogenic regulators. Our experiments demonstrate two comparable approaches of in vitro modeling lipodystrophies with patient-specific iPSCs, and support a regulatory role of lamin A in the terminal differentiation stage of adipogenesis.
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Affiliation(s)
- Zheng-Mei Xiong
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742, USA
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