1
|
Partial Lipodystrophy and LMNA p.R545H Variant. J Clin Med 2021; 10:jcm10051142. [PMID: 33803191 PMCID: PMC7963176 DOI: 10.3390/jcm10051142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/27/2021] [Accepted: 03/02/2021] [Indexed: 11/16/2022] Open
Abstract
Laminopathies are disorders caused by LMNA gene mutations, which selectively affect different tissues and organ systems, and present with heterogeneous clinical and pathological traits. The molecular mechanisms behind these clinical differences and tissue specificity have not been fully clarified. We herein examine the case of a patient carrying a heterozygous LMNA c.1634G>A (p.R545H) variant with a mild, transient myopathy, who was referred to our center for the suspicion of lipodystrophy. At physical examination, an abnormal distribution of subcutaneous fat was noticed, with fat accumulation in the anterior regions of the neck, resembling the fat distribution pattern of familial partial lipodystrophy type 2 (FPLD2). The R545H missense variant has been found at very low allelic frequency in public databases, and in silico analysis showed that this amino acid substitution is predicted to have a damaging role. Other patients carrying the heterozygous LMNA p.R545H allele have shown a marked clinical heterogeneity in terms of phenotypic body fat distribution and severity of organ system involvement. These findings indicate that the LMNA p.R545H heterozygous variant exhibits incomplete penetrance and highly variable expressivity. We hypothesized that additional genetic factors, epigenetic mechanisms, or environmental triggers might explain the variable expressivity of phenotypes among various patients.
Collapse
|
2
|
Li L, Ghorbani M, Weisz-Hubshman M, Rousseau J, Thiffault I, Schnur RE, Breen C, Oegema R, Weiss MM, Waisfisz Q, Welner S, Kingston H, Hills JA, Boon EM, Basel-Salmon L, Konen O, Goldberg-Stern H, Bazak L, Tzur S, Jin J, Bi X, Bruccoleri M, McWalter K, Cho MT, Scarano M, Schaefer GB, Brooks SS, Hughes SS, van Gassen KLI, van Hagen JM, Pandita TK, Agrawal PB, Campeau PM, Yang XJ. Lysine acetyltransferase 8 is involved in cerebral development and syndromic intellectual disability. J Clin Invest 2020; 130:1431-1445. [PMID: 31794431 DOI: 10.1172/jci131145] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 11/21/2019] [Indexed: 12/15/2022] Open
Abstract
Epigenetic integrity is critical for many eukaryotic cellular processes. An important question is how different epigenetic regulators control development and influence disease. Lysine acetyltransferase 8 (KAT8) is critical for acetylation of histone H4 at lysine 16 (H4K16), an evolutionarily conserved epigenetic mark. It is unclear what roles KAT8 plays in cerebral development and human disease. Here, we report that cerebrum-specific knockout mice displayed cerebral hypoplasia in the neocortex and hippocampus, along with improper neural stem and progenitor cell (NSPC) development. Mutant cerebrocortical neuroepithelia exhibited faulty proliferation, aberrant neurogenesis, massive apoptosis, and scant H4K16 propionylation. Mutant NSPCs formed poor neurospheres, and pharmacological KAT8 inhibition abolished neurosphere formation. Moreover, we describe KAT8 variants in 9 patients with intellectual disability, seizures, autism, dysmorphisms, and other anomalies. The variants altered chromobarrel and catalytic domains of KAT8, thereby impairing nucleosomal H4K16 acetylation. Valproate was effective for treating epilepsy in at least 2 of the individuals. This study uncovers a critical role of KAT8 in cerebral and NSPC development, identifies 9 individuals with KAT8 variants, and links deficient H4K16 acylation directly to intellectual disability, epilepsy, and other developmental anomalies.
Collapse
Affiliation(s)
- Lin Li
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Mohammad Ghorbani
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Monika Weisz-Hubshman
- Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Raphael Recanati Genetic Institute, Rabin Medical Center, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Justine Rousseau
- Paediatric Department, CHU Sainte-Justine Hospital, University of Montreal, Quebec, Canada
| | - Isabelle Thiffault
- Center for Pediatric Genomic Medicine & Division of Clinical Genetics, Children's Mercy Hospital, Kansas City, Missouri, USA.,Faculty of Medicine, University of Missouri-Kansas City, Kansas City, Missouri, USA
| | - Rhonda E Schnur
- Division of Genetics, Cooper University Health Care, Camden, New Jersey, USA.,GeneDx, Gaithersburg, Maryland, USA
| | - Catherine Breen
- Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Saint Mary's Hospital, Manchester, United Kingdom
| | - Renske Oegema
- Department of Genetics, University Medical Center Utrecht, Utrecht, Netherlands
| | - Marjan Mm Weiss
- Department of Clinical Genetics, Amsterdam University Medical Center, Amsterdam, Netherlands
| | - Quinten Waisfisz
- Department of Clinical Genetics, Amsterdam University Medical Center, Amsterdam, Netherlands
| | - Sara Welner
- Division of Pediatric Medical Genetics, The State University of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA
| | - Helen Kingston
- Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Saint Mary's Hospital, Manchester, United Kingdom
| | - Jordan A Hills
- University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Elles Mj Boon
- Department of Clinical Genetics, Amsterdam University Medical Center, Amsterdam, Netherlands
| | - Lina Basel-Salmon
- Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Raphael Recanati Genetic Institute, Rabin Medical Center, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva, Israel
| | - Osnat Konen
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Imaging Department, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - Hadassa Goldberg-Stern
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Epilepsy Unit and EEG Laboratory, Schneider Medical Center, Petach Tikva, Israel
| | - Lily Bazak
- Raphael Recanati Genetic Institute, Rabin Medical Center, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shay Tzur
- Laboratory of Molecular Medicine, Rappaport Faculty of Medicine and Research Institute, Technion-Israel Institute of Technology, Haifa, Israel.,Genomic Research Department, Emedgene Technologies, Tel Aviv, Israel
| | - Jianliang Jin
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada.,Research Center for Bone and Stem Cells, Department of Human Anatomy, Key Laboratory of Aging & Disease, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xiuli Bi
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Michael Bruccoleri
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | | | | | - Maria Scarano
- Division of Genetics, Cooper University Health Care, Camden, New Jersey, USA
| | | | - Susan S Brooks
- Division of Pediatric Medical Genetics, The State University of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA
| | - Susan Starling Hughes
- Center for Pediatric Genomic Medicine & Division of Clinical Genetics, Children's Mercy Hospital, Kansas City, Missouri, USA.,Faculty of Medicine, University of Missouri-Kansas City, Kansas City, Missouri, USA
| | - K L I van Gassen
- Department of Genetics, University Medical Center Utrecht, Utrecht, Netherlands
| | - Johanna M van Hagen
- Department of Clinical Genetics, Amsterdam University Medical Center, Amsterdam, Netherlands
| | - Tej K Pandita
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, Texas, USA
| | - Pankaj B Agrawal
- Divisions of Newborn Medicine and Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Philippe M Campeau
- Paediatric Department, CHU Sainte-Justine Hospital, University of Montreal, Quebec, Canada
| | - Xiang-Jiao Yang
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada.,Departments of Biochemistry and Medicine, McGill University Health Center, Montreal, Quebec, Canada
| |
Collapse
|
3
|
Abstract
The practice of genomic medicine stands to revolutionize our approach to medical care, and to realize this goal will require discovery of the relationship between rare variation at each of the ~ 20,000 protein-coding genes and their consequent impact on individual health and expression of Mendelian disease. The step-wise evolution of broad-based, genome-wide cytogenetic and molecular genomic testing approaches (karyotyping, chromosomal microarray [CMA], exome sequencing [ES]) has driven much of the rare disease discovery to this point, with genome sequencing representing the newest member of this team. Each step has brought increased sensitivity to interrogate individual genomic variation in an unbiased method that does not require clinical prediction of the locus or loci involved. Notably, each step has also brought unique limitations in variant detection, for example, the low sensitivity of ES for detection of triploidy, and of CMA for detection of copy neutral structural variants. The utility of genome sequencing (GS) as a clinical molecular diagnostic test, and the increased sensitivity afforded by addition of long-read sequencing or other -omics technologies such as RNAseq or metabolomics, are not yet fully explored, though recent work supports improved sensitivity of variant detection, at least in a subset of cases. The utility of GS will also rely upon further elucidation of the complexities of genetic and allelic heterogeneity, multilocus rare variation, and the impact of rare and common variation at a locus, as well as advances in functional annotation of identified variants. Much discovery remains to be done before the potential utility of GS is fully appreciated.
Collapse
Affiliation(s)
- Jennifer E Posey
- Department of Molecular & Human Genetics, Baylor College of Medicine, One Baylor Plaza, T603, Houston, TX, 77030, USA.
| |
Collapse
|
4
|
Florwick A, Dharmaraj T, Jurgens J, Valle D, Wilson KL. LMNA Sequences of 60,706 Unrelated Individuals Reveal 132 Novel Missense Variants in A-Type Lamins and Suggest a Link between Variant p.G602S and Type 2 Diabetes. Front Genet 2017; 8:79. [PMID: 28663758 PMCID: PMC5471320 DOI: 10.3389/fgene.2017.00079] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/29/2017] [Indexed: 12/18/2022] Open
Abstract
Mutations in LMNA, encoding nuclear intermediate filament proteins lamins A and C, cause multiple diseases ('laminopathies') including muscular dystrophy, dilated cardiomyopathy, familial partial lipodystrophy (FPLD2), insulin resistance syndrome and progeria. To assess the prevalence of LMNA missense mutations ('variants') in a broad, ethnically diverse population, we compared missense alleles found among 60,706 unrelated individuals in the ExAC cohort to those identified in 1,404 individuals in the laminopathy database (UMD-LMNA). We identified 169 variants in the ExAC cohort, of which 37 (∼22%) are disease-associated including p.I299V (allele frequency 0.0402%), p.G602S (allele frequency 0.0262%) and p.R644C (allele frequency 0.124%), suggesting certain LMNA mutations are more common than previously recognized. Independent analysis of LMNA variants via the type 2 diabetes (T2D) Knowledge Portal showed that variant p.G602S associated significantly with type 2 diabetes (p = 0.02; odds ratio = 4.58), and was more frequent in African Americans (allele frequency 0.297%). The FPLD2-associated variant I299V was most prevalent in Latinos (allele frequency 0.347%). The ExAC cohort also revealed 132 novel LMNA missense variants including p.K108E (limited to individuals with psychiatric disease; predicted to perturb coil-1B), p.R397C and p.R427C (predicted to perturb filament biogenesis), p.G638R and p.N660D (predicted to perturb prelamin A processing), and numerous Ig-fold variants predicted to perturb phenotypically characteristic protein-protein interactions. Overall, this two-pronged strategy- mining a large database for missense variants in a single gene (LMNA), coupled to knowledge about the structure, biogenesis and functions of A-type lamins- revealed an unexpected number of LMNA variants, including novel variants predicted to perturb lamin assembly or function. Interestingly, this study also correlated novel variant p.K108E with psychiatric disease, identified known variant p.I299V as a potential risk factor for metabolic disease in Latinos, linked variant p.G602 with type 2 diabetes, and identified p.G602S as a predictor of diabetes risk in African Americans.
Collapse
Affiliation(s)
- Alyssa Florwick
- Department of Cell Biology, Johns Hopkins University School of Medicine, BaltimoreMD, United States
| | - Tejas Dharmaraj
- Department of Cell Biology, Johns Hopkins University School of Medicine, BaltimoreMD, United States
| | - Julie Jurgens
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, BaltimoreMD, United States
| | - David Valle
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, BaltimoreMD, United States
| | - Katherine L. Wilson
- Department of Cell Biology, Johns Hopkins University School of Medicine, BaltimoreMD, United States
| |
Collapse
|
5
|
Elouej S, Beleza-Meireles A, Caswell R, Colclough K, Ellard S, Desvignes JP, Béroud C, Lévy N, Mohammed S, De Sandre-Giovannoli A. Exome sequencing reveals a de novo POLD1 mutation causing phenotypic variability in mandibular hypoplasia, deafness, progeroid features, and lipodystrophy syndrome (MDPL). Metabolism 2017; 71:213-225. [PMID: 28521875 DOI: 10.1016/j.metabol.2017.03.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 03/17/2017] [Accepted: 03/21/2017] [Indexed: 01/19/2023]
Abstract
BACKGROUND Mandibular hypoplasia, deafness, progeroid features, and lipodystrophy syndrome (MDPL) is an autosomal dominant systemic disorder characterized by prominent loss of subcutaneous fat, a characteristic facial appearance and metabolic abnormalities. This syndrome is caused by heterozygous de novo mutations in the POLD1 gene. To date, 19 patients with MDPL have been reported in the literature and among them 14 patients have been characterized at the molecular level. Twelve unrelated patients carried a recurrent in-frame deletion of a single codon (p.Ser605del) and two other patients carried a novel heterozygous mutation in exon 13 (p.Arg507Cys). Additionally and interestingly, germline mutations of the same gene have been involved in familial polyposis and colorectal cancer (CRC) predisposition. PATIENTS AND METHODS We describe a male and a female patient with MDPL respectively affected with mild and severe phenotypes. Both of them showed mandibular hypoplasia, a beaked nose with bird-like facies, prominent eyes, a small mouth, growth retardation, muscle and skin atrophy, but the female patient showed such a severe and early phenotype that a first working diagnosis of Hutchinson-Gilford Progeria was made. The exploration was performed by direct sequencing of POLD1 gene exon 15 in the male patient with a classical MDPL phenotype and by whole exome sequencing in the female patient and her unaffected parents. RESULTS Exome sequencing identified in the latter patient a de novo heterozygous undescribed mutation in the POLD1 gene (NM_002691.3: c.3209T>A), predicted to cause the missense change p.Ile1070Asn in the ZnF2 (Zinc Finger 2) domain of the protein. This mutation was not reported in the 1000 Genome Project, dbSNP and Exome sequencing databases. Furthermore, the Isoleucine1070 residue of POLD1 is highly conserved among various species, suggesting that this substitution may cause a major impairment of POLD1 activity. For the second patient, affected with a typical MDPL phenotype, direct sequencing of POLD1 exon 15 revealed the recurrent in-frame deletion (c.1812_1814del, p.S605del). CONCLUSION Our work highlights that mutations in different POLD1 domains can lead to phenotypic variability, ranging from dominantly inherited cancer predisposition syndromes, to mild MDPL phenotypes without lifespan reduction, to very severe MDPL syndromes with major premature aging features. These results also suggest that POLD1 gene testing should be considered in patients presenting with severe progeroid features.
Collapse
Affiliation(s)
- Sahar Elouej
- Aix Marseille Univ, INSERM, GMGF, Marseille, France
| | - Ana Beleza-Meireles
- Department of Clinical Genetics, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Richard Caswell
- Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK
| | - Kevin Colclough
- Department of Molecular Genetics, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | - Sian Ellard
- Department of Molecular Genetics, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | | | - Christophe Béroud
- Aix Marseille Univ, INSERM, GMGF, Marseille, France; Department of Medical Genetics, Molecular genetics Laboratory, La Timone Children's Hospital, 264 Rue Saint Pierre, 13005, Marseille, France
| | - Nicolas Lévy
- Aix Marseille Univ, INSERM, GMGF, Marseille, France; Department of Medical Genetics, Molecular genetics Laboratory, La Timone Children's Hospital, 264 Rue Saint Pierre, 13005, Marseille, France
| | - Shehla Mohammed
- Department of Clinical Genetics, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Annachiara De Sandre-Giovannoli
- Aix Marseille Univ, INSERM, GMGF, Marseille, France; Department of Medical Genetics, Molecular genetics Laboratory, La Timone Children's Hospital, 264 Rue Saint Pierre, 13005, Marseille, France.
| |
Collapse
|
6
|
Gonzalo S, Kreienkamp R, Askjaer P. Hutchinson-Gilford Progeria Syndrome: A premature aging disease caused by LMNA gene mutations. Ageing Res Rev 2017; 33:18-29. [PMID: 27374873 DOI: 10.1016/j.arr.2016.06.007] [Citation(s) in RCA: 167] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 06/25/2016] [Accepted: 06/28/2016] [Indexed: 01/08/2023]
Abstract
Products of the LMNA gene, primarily lamin A and C, are key components of the nuclear lamina, a proteinaceous meshwork that underlies the inner nuclear membrane and is essential for proper nuclear architecture. Alterations in lamin A and C that disrupt the integrity of the nuclear lamina affect a whole repertoire of nuclear functions, causing cellular decline. In humans, hundreds of mutations in the LMNA gene have been identified and correlated with over a dozen degenerative disorders, referred to as laminopathies. These diseases include neuropathies, muscular dystrophies, lipodystrophies, and premature aging diseases. This review focuses on one of the most severe laminopathies, Hutchinson-Gilford Progeria Syndrome (HGPS), which is caused by aberrant splicing of the LMNA gene and expression of a mutant product called progerin. Here, we discuss current views about the molecular mechanisms that contribute to the pathophysiology of this devastating disease, as well as the strategies being tested in vitro and in vivo to counteract progerin toxicity. In particular, progerin accumulation elicits nuclear morphological abnormalities, misregulated gene expression, defects in DNA repair, telomere shortening, and genomic instability, all of which limit cellular proliferative capacity. In patients harboring this mutation, a severe premature aging disease develops during childhood. Interestingly, progerin is also produced in senescent cells and cells from old individuals, suggesting that progerin accumulation might be a factor in physiological aging. Deciphering the molecular mechanisms whereby progerin expression leads to HGPS is an emergent area of research, which could bring us closer to understanding the pathology of aging.
Collapse
Affiliation(s)
- Susana Gonzalo
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA.
| | - Ray Kreienkamp
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Peter Askjaer
- Andalusian Center for Developmental Biology (CABD), CSIC/Junta de Andalucia/Universidad Pablo de Olavide, Carretera de Utrera, Km 1, 41013 Seville, Spain
| |
Collapse
|
7
|
Harel T, Yesil G, Bayram Y, Coban-Akdemir Z, Charng WL, Karaca E, Al Asmari A, Eldomery MK, Hunter JV, Jhangiani SN, Rosenfeld JA, Pehlivan D, El-Hattab AW, Saleh MA, LeDuc CA, Muzny D, Boerwinkle E, Gibbs RA, Chung WK, Yang Y, Belmont JW, Lupski JR. Monoallelic and Biallelic Variants in EMC1 Identified in Individuals with Global Developmental Delay, Hypotonia, Scoliosis, and Cerebellar Atrophy. Am J Hum Genet 2016; 98:562-570. [PMID: 26942288 DOI: 10.1016/j.ajhg.2016.01.011] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 01/19/2016] [Indexed: 01/08/2023] Open
Abstract
The paradigm of a single gene associated with one specific phenotype and mode of inheritance has been repeatedly challenged. Genotype-phenotype correlations can often be traced to different mutation types, localization of the variants in distinct protein domains, or the trigger of or escape from nonsense-mediated decay. Using whole-exome sequencing, we identified homozygous variants in EMC1 that segregated with a phenotype of developmental delay, hypotonia, scoliosis, and cerebellar atrophy in three families. In addition, a de novo heterozygous EMC1 variant was seen in an individual with a similar clinical and MRI imaging phenotype. EMC1 encodes a member of the endoplasmic reticulum (ER)-membrane protein complex (EMC), an evolutionarily conserved complex that has been proposed to have multiple roles in ER-associated degradation, ER-mitochondria tethering, and proper assembly of multi-pass transmembrane proteins. Perturbations of protein folding and organelle crosstalk have been implicated in neurodegenerative processes including cerebellar atrophy. We propose EMC1 as a gene in which either biallelic or monoallelic variants might lead to a syndrome including intellectual disability and preferential degeneration of the cerebellum.
Collapse
Affiliation(s)
- Tamar Harel
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Gozde Yesil
- Department of Medical Genetics, Bezmialem University, Istanbul 34093, Turkey
| | - Yavuz Bayram
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Zeynep Coban-Akdemir
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Wu-Lin Charng
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ender Karaca
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ali Al Asmari
- Section of Medical Genetics, Children's Specialist Hospital, King Fahad Medical City, Riyadh 11525, Saudi Arabia
| | - Mohammad K Eldomery
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jill V Hunter
- Department of Pediatric Radiology, Texas Children's Hospital, Houston, TX 77030, USA
| | - Shalini N Jhangiani
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Baylor Miraca Genetics Laboratories, Baylor College of Medicine, Houston, TX 77030, USA
| | - Davut Pehlivan
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ayman W El-Hattab
- Division of Clinical Genetics and Metabolic Disorders, Department of Pediatrics, Tawam Hospital, Al-Ain 15258, United Arab Emirates
| | - Mohammed A Saleh
- Section of Medical Genetics, Children's Specialist Hospital, King Fahad Medical City, Riyadh 11525, Saudi Arabia
| | - Charles A LeDuc
- Department of Pediatrics, Columbia University Medical Center, New York, NY 10032, USA
| | - Donna Muzny
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Eric Boerwinkle
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA; Human Genetics Center, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Richard A Gibbs
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Wendy K Chung
- Departments of Pediatrics and Medicine, Columbia University Medical Center, New York, NY 10032, USA
| | - Yaping Yang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Baylor Miraca Genetics Laboratories, Baylor College of Medicine, Houston, TX 77030, USA
| | - John W Belmont
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - James R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA; Texas Children's Hospital, Houston TX 77030, USA
| |
Collapse
|
8
|
Barthélémy F, Navarro C, Fayek R, Da Silva N, Roll P, Sigaudy S, Oshima J, Bonne G, Papadopoulou-Legbelou K, Evangeliou AE, Spilioti M, Lemerrer M, Wevers RA, Morava E, Robaglia-Schlupp A, Lévy N, Bartoli M, De Sandre-Giovannoli A. Truncated prelamin A expression in HGPS-like patients: a transcriptional study. Eur J Hum Genet 2015; 23:1051-61. [PMID: 25649378 DOI: 10.1038/ejhg.2014.239] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 09/11/2014] [Accepted: 10/01/2014] [Indexed: 11/09/2022] Open
Abstract
Premature aging syndromes are rare genetic disorders mimicking clinical and molecular features of aging. A recently identified group of premature aging syndromes is linked to mutation of the LMNA gene encoding lamins A and C, and is associated with nuclear deformation and dysfunction. Hutchinson-Gilford progeria syndrome (HGPS) was the first premature aging syndrome linked to LMNA mutation and its molecular bases have been deeply investigated. It is due to a recurrent de novo mutation leading to aberrant splicing and the production of a truncated and toxic nuclear lamin A precursor (prelamin AΔ50), also called progerin. In this work and based on the literature data, we propose to distinguish two main groups of premature aging laminopathies: (1) HGPS and HGP-like syndromes, which share clinical features due to hampered processing and intranuclear toxic accumulation of prelamin A isoforms; and (2) APS (atypical progeria syndromes), due to dominant or recessive missense mutations affecting lamins A and C. Among HGPS-like patients, several deleted prelamin A transcripts (prelamin AΔ50, AΔ35 and AΔ90) have been described. The purpose of this work was to characterize those transcripts in eight patients affected with HGP-like rare syndromes. When fibroblasts were available, the relationships between the presence and ratios of these transcripts and other parameters were studied, aiming to increase our understanding of genotype-phenotype relationships in HGPS-like patients. Altogether our results evidence that progerin accumulation is the major pathogenetic mechanism responsible for HGP-like syndromes due to mutations near the donor splice site of exon 11.
Collapse
Affiliation(s)
| | - Claire Navarro
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | - Racha Fayek
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | | | - Patrice Roll
- 1] Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France [2] Département de Génétique Médicale et de Biologie Cellulaire, AP-HM, Hôpital d'Enfants de la Timone, Marseille, France
| | - Sabine Sigaudy
- 1] Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France [2] Département de Génétique Médicale et de Biologie Cellulaire, AP-HM, Hôpital d'Enfants de la Timone, Marseille, France
| | - Junko Oshima
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Gisèle Bonne
- 1] Inserm, U974, Paris, France [2] Université Pierre et Marie Curie- Paris 6, UM 76, CNRS, UMR 7215, Institut de Myologie, Paris, France [3] AP-HP, Groupe Hospitalier Pitié-Salpêtrière, U.F. Cardiogénétique et Myogénétique, Service de Biochimie Métabolique, Paris, France
| | - Kyriaki Papadopoulou-Legbelou
- 4th Department of Pediatrics of the Aristotle University of Thessaloniki, Papageorgiou Hospital, Thessaloniki, Greece
| | - Athanasios E Evangeliou
- 4th Department of Pediatrics of the Aristotle University of Thessaloniki, Papageorgiou Hospital, Thessaloniki, Greece
| | - Martha Spilioti
- 1st Department of Neurology of the Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki, Greece
| | - Martine Lemerrer
- Département de génétique, IFR 94-Institut de Recherche Necker Enfants Malades- CHU Paris-Hôpital Necker-Enfants Malades, Paris, France
| | - Ron A Wevers
- Department of Laboratory Medicine, IGMD, Nijmegen, The Netherlands
| | - Eva Morava
- Clinical Biochemical Genetics, Hayward Genetics Center, Tulane University Medical School, New Orleans, LA, USA
| | - Andrée Robaglia-Schlupp
- 1] Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France [2] Département de Génétique Médicale et de Biologie Cellulaire, AP-HM, Hôpital d'Enfants de la Timone, Marseille, France
| | - Nicolas Lévy
- 1] Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France [2] Département de Génétique Médicale et de Biologie Cellulaire, AP-HM, Hôpital d'Enfants de la Timone, Marseille, France
| | - Marc Bartoli
- 1] Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France [2] Département de Génétique Médicale et de Biologie Cellulaire, AP-HM, Hôpital d'Enfants de la Timone, Marseille, France
| | - Annachiara De Sandre-Giovannoli
- 1] Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France [2] Département de Génétique Médicale et de Biologie Cellulaire, AP-HM, Hôpital d'Enfants de la Timone, Marseille, France
| |
Collapse
|
9
|
Cho M, Suh Y. Genome maintenance and human longevity. Curr Opin Genet Dev 2014; 26:105-15. [PMID: 25151201 DOI: 10.1016/j.gde.2014.07.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 07/16/2014] [Accepted: 07/18/2014] [Indexed: 12/18/2022]
Abstract
Accumulation of DNA damage and mutations is considered an important causal factor in age-related diseases. Genetic defects in DNA repair cause premature onset and accelerated progression of age-related diseases and a shorter life span in humans and mice, providing strong evidence that genome maintenance is a bona fide longevity assurance pathway. However, the contribution of genome maintenance to human longevity itself remains to be established. Here, we review the results of human genetics studies, including genome wide association studies, and attempted to catalogue all genes involved in major DNA repair pathways that harbor variants associated with longevity. We hope to provide a comprehensive review to facilitate future endeavors aimed at uncovering the functional role of genome maintenance genes in human longevity.
Collapse
Affiliation(s)
- Miook Cho
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Yousin Suh
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
| |
Collapse
|
10
|
Abstract
The LMNA gene gives rise to at least three isoforms (lamin A, C, lamin AΔ10) as a result of normal alternative splicing, regulated by cis- and trans-acting regulatory factors, as well as the 5' and 3' untranslated regions of the gene. The two main isoforms, lamin A and C, are constitutive components of the fibrous nuclear lamina and have diverse physiological roles, ranging from mechanical nuclear membrane maintenance to gene regulation. The clinical spectrum of diseases (called 'laminopathies') caused by LMNA mutations is broad, including at least eight well-characterised phenotypes, some of which are confined to the skeletal muscles or skin, while others are multisystemic. This review discusses the different alternatively spliced isoforms of LMNA and the regulation of LMNA splicing, as well as the subgroup of mutations that affect splicing of LMNA pre-mRNA, and also seeks to bridge the mis-splicing of LMNA at transcript level and the resulting clinical phenotypes. Finally, we discuss the manipulation of LMNA splicing by splice-switching antisense oligonucleotides and its therapeutic potential for the treatment of some laminopathies.
Collapse
Affiliation(s)
- Yue-Bei Luo
- Centre for Neuromuscular and Neurological Disorders, Australian Neuro-Muscular Research Institute, University of Western Australia, Perth, Australia
| | | | | |
Collapse
|
11
|
Abstract
Hutchinson–Gilford Progeria Syndrome and Werner syndrome, also known as childhood- and
adulthood-progeria, respectively, represent two of the best characterized human progeroid diseases
with clinical features mimicking physiological aging at an early age. The discovery of their genetic
basis has led to the identification of several gene mutations leading to a spectrum of progeroid
phenotypes ranging from moderate and mild–severe to very aggressive forms. In parallel, the
creation of disease registers and databases provided available data for the design of relatively
large-scale epidemiological studies, thereby allowing a better understanding of the nature and
frequency of the premature aging-associated signs and symptoms. The aim of this article is to review
the most recent findings concerning the epidemiology of premature aging disorders, their genetic
basis, and the most recent reports on the frequency of associated diseases.
Collapse
Affiliation(s)
- Fabio Coppedè
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy.
| |
Collapse
|
12
|
Zhavoronkov A, Smit-McBride Z, Guinan KJ, Litovchenko M, Moskalev A. Potential therapeutic approaches for modulating expression and accumulation of defective lamin A in laminopathies and age-related diseases. J Mol Med (Berl) 2012; 90:1361-89. [PMID: 23090008 PMCID: PMC3506837 DOI: 10.1007/s00109-012-0962-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Revised: 09/08/2012] [Accepted: 09/25/2012] [Indexed: 01/28/2023]
Abstract
Scientific understanding of the genetic components of aging has increased in recent years, with several genes being identified as playing roles in the aging process and, potentially, longevity. In particular, genes encoding components of the nuclear lamina in eukaryotes have been increasingly well characterized, owing in part to their clinical significance in age-related diseases. This review focuses on one such gene, which encodes lamin A, a key component of the nuclear lamina. Genetic variation in this gene can give rise to lethal, early-onset diseases known as laminopathies. Here, we analyze the literature and conduct computational analyses of lamin A signaling and intracellular interactions in order to examine potential mechanisms for altering or slowing down aberrant Lamin A expression and/or for restoring the ratio of normal to aberrant lamin A. The ultimate goal of such studies is to ameliorate or combat laminopathies and related diseases of aging, and we provide a discussion of current approaches in this review.
Collapse
Affiliation(s)
- Alex Zhavoronkov
- Bioinformatics and Medical Information Technology Laboratory, Center for Pediatric Hematology, Oncology and Immunology, Moscow, 119296 Russia
- The Biogerontology Research Foundation, Reading, UK
| | - Zeljka Smit-McBride
- Department of Ophthalmology and Vision Science, School of Medicine, University of California at Davis, Davis, CA 95616 USA
| | - Kieran J. Guinan
- The Biogerontology Research Foundation, Reading, UK
- BioAtlantis Ltd., Kerry Technology Park, Tralee, County Kerry Ireland
| | - Maria Litovchenko
- Bioinformatics and Medical Information Technology Laboratory, Center for Pediatric Hematology, Oncology and Immunology, Moscow, 119296 Russia
| | - Alexey Moskalev
- The Biogerontology Research Foundation, Reading, UK
- Laboratory of Molecular Radiobiology and Gerontology, Institute of Biology, Komi Science Center of Russian Academy of Sciences, Syktyvkar, 167982 Russia
| |
Collapse
|
13
|
Butin-Israeli V, Adam SA, Goldman AE, Goldman RD. Nuclear lamin functions and disease. Trends Genet 2012; 28:464-71. [PMID: 22795640 DOI: 10.1016/j.tig.2012.06.001] [Citation(s) in RCA: 173] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 05/25/2012] [Accepted: 06/13/2012] [Indexed: 12/26/2022]
Abstract
Recent studies have shown that premature cellular senescence and normal organ development and function depend on the type V intermediate filament proteins, the lamins, which are major structural proteins of the nucleus. This review presents an up-to-date summary of the literature describing new findings on lamin functions in various cellular processes and emphasizes the relationship between the lamins and devastating diseases ranging from premature aging to cancer. Recent insights into the structure and function of the A- and B- type lamins in normal cells and their dysfunctions in diseased cells are providing novel targets for the development of new diagnostic procedures and disease intervention. We summarize these recent findings, focusing on data from mice and humans, and highlight the expanding knowledge of these proteins in both healthy and diseased cells.
Collapse
Affiliation(s)
- Veronika Butin-Israeli
- Department of Cell and Molecular Biology, Feinberg School of Medicine, Northwestern University, 303 East Chicago Avenue, Chicago, IL 60611, USA.
| | | | | | | |
Collapse
|
14
|
Conneely KN, Capell BC, Erdos MR, Sebastiani P, Solovieff N, Swift AJ, Baldwin CT, Budagov T, Barzilai N, Atzmon G, Puca AA, Perls TT, Geesaman BJ, Boehnke M, Collins FS. Human longevity and common variations in the LMNA gene: a meta-analysis. Aging Cell 2012; 11:475-81. [PMID: 22340368 DOI: 10.1111/j.1474-9726.2012.00808.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
A mutation in the LMNA gene is responsible for the most dramatic form of premature aging, Hutchinson-Gilford progeria syndrome (HGPS). Several recent studies have suggested that protein products of this gene might have a role in normal physiological cellular senescence. To explore further LMNA's possible role in normal aging, we genotyped 16 SNPs over a span of 75.4 kb of the LMNA gene on a sample of long-lived individuals (LLI) (US Caucasians with age ≥ 95 years, N=873) and genetically matched younger controls (N=443). We tested all common nonredundant haplotypes (frequency ≥ 0.05) based on subgroups of these 16 SNPs for association with longevity. The most significant haplotype, based on four SNPs, remained significant after adjustment for multiple testing (OR=1.56, P=2.5 × 10(-5) , multiple-testing-adjusted P=0.0045). To attempt to replicate these results, we genotyped 3619 subjects from four independent samples of LLI and control subjects from (i) the New England Centenarian Study (NECS) (N=738), (ii) the Southern Italian Centenarian Study (SICS) (N=905), (iii) France (N=1103), and (iv) the Einstein Ashkenazi Longevity Study (N= 702). We replicated the association with the most significant haplotype from our initial analysis in the NECS sample (OR=1.60, P=0.0023), but not in the other three samples (P > 0.15). In a meta-analysis combining all five samples, the best haplotype remained significantly associated with longevity after adjustment for multiple testing in the initial and follow-up samples (OR=1.18, P=7.5 × 10(-4) , multiple-testing-adjusted P=0.037). These results suggest that LMNA variants may play a role in human lifespan.
Collapse
Affiliation(s)
- Karen N Conneely
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Stallmeyer B, Koopmann M, Schulze-Bahr E. Identification of Novel Mutations in LMNA Associated with Familial Forms of Dilated Cardiomyopathy. Genet Test Mol Biomarkers 2012; 16:543-9. [DOI: 10.1089/gtmb.2011.0214] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Birgit Stallmeyer
- Institut für Genetik von Herzerkrankungen (IfGH), Universitätsklinik Münster, Münster, Germany
- Interdisziplinäres Zentrum für klinische Forschung (IZKF), Münster, Germany
| | - Matthias Koopmann
- Department für Kardiology und Angiology, Universitätsklinik Münster, Münster, Germany
| | - Eric Schulze-Bahr
- Institut für Genetik von Herzerkrankungen (IfGH), Universitätsklinik Münster, Münster, Germany
- Interdisziplinäres Zentrum für klinische Forschung (IZKF), Münster, Germany
- Department für Kardiology und Angiology, Universitätsklinik Münster, Münster, Germany
| |
Collapse
|