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Lian J, Du L, Li Y, Yin Y, Yu L, Wang S, Ma H. Hutchinson-Gilford progeria syndrome: Cardiovascular manifestations and treatment. Mech Ageing Dev 2023; 216:111879. [PMID: 37832833 DOI: 10.1016/j.mad.2023.111879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/04/2023] [Accepted: 10/09/2023] [Indexed: 10/15/2023]
Abstract
Hutchinson-Gilford progeria syndrome (HGPS), also known as hereditary progeria syndrome, is caused by mutations in the LMNA gene and the expression of progerin, which causes accelerated aging and premature death, with most patients dying of heart failure or other cardiovascular complications in their teens. HGPS patients are able to exhibit cardiovascular phenotypes similar to physiological aging, such as extensive atherosclerosis, smooth muscle cell loss, vascular lesions, and electrical and functional abnormalities of the heart. It also excludes the traditional risk causative factors of cardiovascular disease, making HGPS a new model for studying aging-related cardiovascular disease. Here, we analyzed the pathogenesis and pathophysiological characteristics of HGPS and the relationship between HGPS and cardiovascular disease, provided insight into the molecular mechanisms of cardiovascular disease pathogenesis in HGPS patients and treatment strategies for this disease. Moreover, we summarize the disease models used in HGPS studies to improve our understanding of the pathological mechanisms of cardiovascular aging in HGPS patients.
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Affiliation(s)
- Jing Lian
- Medical School of Yan'an University, Yan'an, China
| | - Linfang Du
- Medical School of Yan'an University, Yan'an, China
| | - Yang Li
- School of Basic Medical Sciences, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
| | - Yue Yin
- Department of Physiology and Pathophysiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Lu Yu
- Department of Pathology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China.
| | | | - Heng Ma
- Department of Physiology and Pathophysiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China.
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Kychygina A, Dall'Osto M, Allen JAM, Cadoret JC, Piras V, Pickett HA, Crabbe L. Progerin impairs 3D genome organization and induces fragile telomeres by limiting the dNTP pools. Sci Rep 2021; 11:13195. [PMID: 34162976 PMCID: PMC8222272 DOI: 10.1038/s41598-021-92631-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 06/11/2021] [Indexed: 11/09/2022] Open
Abstract
Chromatin organization within the nuclear volume is essential to regulate many aspects of its function and to safeguard its integrity. A key player in this spatial scattering of chromosomes is the nuclear envelope (NE). The NE tethers large chromatin domains through interaction with the nuclear lamina and other associated proteins. This organization is perturbed in cells from Hutchinson–Gilford progeria syndrome (HGPS), a genetic disorder characterized by premature aging features. Here, we show that HGPS-related lamina defects trigger an altered 3D telomere organization with increased contact sites between telomeres and the nuclear lamina, and an altered telomeric chromatin state. The genome-wide replication timing signature of these cells is perturbed, with a shift to earlier replication for regions that normally replicate late. As a consequence, we detected a higher density of replication forks traveling simultaneously on DNA fibers, which relies on limiting cellular dNTP pools to support processive DNA synthesis. Remarkably, increasing dNTP levels in HGPS cells rescued fragile telomeres, and improved the replicative capacity of the cells. Our work highlights a functional connection between NE dysfunction and telomere homeostasis in the context of premature aging.
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Affiliation(s)
- Anna Kychygina
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Integrative (CBI), CNRS, UPS, University of Toulouse, 31062, Toulouse, France.,INSERM UMR1291, CNRS UMR5051, UT3, Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), 31059, Toulouse, France
| | - Marina Dall'Osto
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Integrative (CBI), CNRS, UPS, University of Toulouse, 31062, Toulouse, France
| | - Joshua A M Allen
- Telomere Length Regulation Unit, Faculty of Medicine and Health, Children's Medical Research Institute, University of Sydney, Westmead, NSW, 2145, Australia
| | | | - Vincent Piras
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Integrative (CBI), CNRS, UPS, University of Toulouse, 31062, Toulouse, France
| | - Hilda A Pickett
- Telomere Length Regulation Unit, Faculty of Medicine and Health, Children's Medical Research Institute, University of Sydney, Westmead, NSW, 2145, Australia
| | - Laure Crabbe
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Integrative (CBI), CNRS, UPS, University of Toulouse, 31062, Toulouse, France.
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Komari CJ, Guttman AO, Carr SR, Trachtenberg TL, Orloff EA, Haas AV, Patrick AR, Chowdhary S, Waldman BC, Waldman AS. Alteration of genetic recombination and double-strand break repair in human cells by progerin expression. DNA Repair (Amst) 2020; 96:102975. [PMID: 33010688 DOI: 10.1016/j.dnarep.2020.102975] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/21/2020] [Accepted: 09/04/2020] [Indexed: 01/04/2023]
Abstract
Hutchinson-Gilford Progeria Syndrome (HGPS) is a rare autosomal, dominant genetic condition characterized by many features of accelerated aging. On average, children with HGPS live to about fourteen years of age. The syndrome is commonly caused by a point mutation in the LMNA gene which normally codes for lamin A and its splice variant lamin C, components of the nuclear lamina. The LMNA mutation alters splicing, leading to production of a truncated, farnesylated form of lamin A referred to as "progerin." Progerin is also expressed at very low levels in healthy individuals and appears to play a role in normal aging. HGPS is associated with an accumulation of genomic DNA double-strand breaks (DSBs), suggesting corruption of DNA repair. In this work, we investigated the influence of progerin expression on DSB repair in the human genome at the nucleotide level. We used a model system that involves a reporter DNA substrate inserted in the genome of cultured human cells. A DSB could be induced within the substrate through exogenous expression of endonuclease I-SceI, and DSB repair events occurring via either homologous recombination (HR) or nonhomologous end-joining (NHEJ) were recoverable. Additionally, spontaneous HR events were recoverable in the absence of artificial DSB induction. We compared DSB repair and spontaneous HR in cells overexpressing progerin versus cells expressing no progerin. We report that overexpression of progerin correlated with an increase in DSB repair via NHEJ relative to HR, as well as an increased fraction of HR events occurring via gene conversion. Progerin also engendered an apparent increase in spontaneous HR events, with a highly significant shift toward gene conversion events, and an increase in DNA amplification events. Such influences of progerin on DNA transactions may impact genome stability and contribute to aging.
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Affiliation(s)
- Celina J Komari
- Department of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | - Anne O Guttman
- Department of Exercise Science, University of South Carolina, Columbia, SC 29208, USA
| | - Shelby R Carr
- Department of Exercise Science, University of South Carolina, Columbia, SC 29208, USA
| | - Taylor L Trachtenberg
- Department of Exercise Science, University of South Carolina, Columbia, SC 29208, USA
| | - Elise A Orloff
- Department of Exercise Science, University of South Carolina, Columbia, SC 29208, USA
| | - Ashley V Haas
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Andrew R Patrick
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Sona Chowdhary
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Barbara C Waldman
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Alan S Waldman
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA.
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Foo MXR, Ong PF, Dreesen O. Premature aging syndromes: From patients to mechanism. J Dermatol Sci 2019; 96:58-65. [PMID: 31727429 DOI: 10.1016/j.jdermsci.2019.10.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/15/2019] [Accepted: 10/18/2019] [Indexed: 12/24/2022]
Abstract
Aging is an inevitable consequence of human life resulting in a gradual deterioration of cell, tissue and organismal function and an increased risk to develop chronic ailments. Premature aging syndromes, also known as progeroid syndromes, recapitulate many clinical features of normal aging and offer a unique opportunity to elucidate fundamental mechanisms that contribute to human aging. Progeroid syndromes can be broadly classified into those caused by perturbations of the nuclear lamina, a meshwork of proteins located underneath the inner nuclear membrane (laminopathies); and a second group that is caused by mutations that directly impair DNA replication and repair. We will focus mainly on laminopathies caused by incorrect processing of lamin A, an intermediate filament protein that resides at the nuclear periphery. Hutchinson-Gilford Progeria (HGPS) is an accelerated aging syndrome caused by a mutation in lamin A and one of the best studied laminopathies. HGPS patients exhibit clinical characteristics of premature aging, including alopecia, aberrant pigmentation, loss of subcutaneous fat and die in their teens as a result of atherosclerosis and cardiovascular complications. Here we summarize how cell- and mouse-based disease models provided mechanistic insights into human aging and discuss experimental strategies under consideration for the treatment of these rare genetic disorders.
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Affiliation(s)
- Mattheus Xing Rong Foo
- Cell Aging Laboratory, Skin Research Institute of Singapore, 8A Biomedical Grove, #06-06 Immunos, 138648 Singapore; Nanyang Technological University, Singapore
| | - Peh Fern Ong
- Cell Aging Laboratory, Skin Research Institute of Singapore, 8A Biomedical Grove, #06-06 Immunos, 138648 Singapore
| | - Oliver Dreesen
- Cell Aging Laboratory, Skin Research Institute of Singapore, 8A Biomedical Grove, #06-06 Immunos, 138648 Singapore; Nanyang Technological University, Singapore.
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Barton LJ, Duan T, Ke W, Luttinger A, Lovander KE, Soshnev AA, Geyer PK. Nuclear lamina dysfunction triggers a germline stem cell checkpoint. Nat Commun 2018; 9:3960. [PMID: 30262885 PMCID: PMC6160405 DOI: 10.1038/s41467-018-06277-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 08/13/2018] [Indexed: 12/13/2022] Open
Abstract
LEM domain (LEM-D) proteins are conserved components of the nuclear lamina (NL) that contribute to stem cell maintenance through poorly understood mechanisms. The Drosophila emerin homolog Otefin (Ote) is required for maintenance of germline stem cells (GSCs) and gametogenesis. Here, we show that ote mutants carry germ cell-specific changes in nuclear architecture that are linked to GSC loss. Strikingly, we found that both GSC death and gametogenesis are rescued by inactivation of the DNA damage response (DDR) kinases, ATR and Chk2. Whereas the germline checkpoint draws from components of the DDR pathway, genetic and cytological features of the GSC checkpoint differ from the canonical pathway. Instead, structural deformation of the NL correlates with checkpoint activation. Despite remarkably normal oogenesis, rescued oocytes do not support embryogenesis. Taken together, these data suggest that NL dysfunction caused by Otefin loss triggers a GSC-specific checkpoint that contributes to maintenance of gamete quality. Otefin is a nuclear lamina protein required for survival of Drosophila germ stem cells. Here the authors show that nuclear lamina dysfunction resulting from loss of Otefin activates a DNA damage-independent germ stem cell-specific checkpoint, mediated by the ATR and Chk2 kinases, which ensures that healthy gametes are passed on to the next generation.
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Affiliation(s)
- Lacy J Barton
- Department of Biochemistry, University of Iowa, Iowa City, IA, 52242, USA.,Department of Cell Biology, Skirball Institute, NYU School of Medicine, 540 First Avenue, New York, NY, 10016, USA
| | - Tingting Duan
- Department of Biochemistry, University of Iowa, Iowa City, IA, 52242, USA
| | - Wenfan Ke
- Department of Biochemistry, University of Iowa, Iowa City, IA, 52242, USA.,Department of Biology, University of Virginia, 485 McCormick Rd, Charlottesville, VA, 22904, USA
| | - Amy Luttinger
- Department of Biochemistry, University of Iowa, Iowa City, IA, 52242, USA
| | - Kaylee E Lovander
- Department of Biochemistry, University of Iowa, Iowa City, IA, 52242, USA
| | - Alexey A Soshnev
- Department of Biochemistry, University of Iowa, Iowa City, IA, 52242, USA.,Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, 1230 York Avenue, New York, NY, 10065, USA
| | - Pamela K Geyer
- Department of Biochemistry, University of Iowa, Iowa City, IA, 52242, USA.
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