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Paul S, McCourt PM, Le LTM, Ryu J, Czaja W, Bode AM, Contreras-Galindo R, Dong Z. Fyn-mediated phosphorylation of Menin disrupts telomere maintenance in stem cells. bioRxiv 2024:2023.10.04.560876. [PMID: 37873235 PMCID: PMC10592958 DOI: 10.1101/2023.10.04.560876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Telomeres protect chromosome ends and determine the replication potential of dividing cells. The canonical telomere sequence TTAGGG is synthesized by telomerase holoenzyme, which maintains telomere length in proliferative stem cells. Although the core components of telomerase are well-defined, mechanisms of telomerase regulation are still under investigation. We report a novel role for the Src family kinase Fyn, which disrupts telomere maintenance in stem cells by phosphorylating the scaffold protein Menin. We found that Fyn knockdown prevented telomere erosion in human and mouse stem cells, validating the results with four telomere measurement techniques. We show that Fyn phosphorylates Menin at tyrosine 603 (Y603), which increases Menin's SUMO1 modification, C-terminal stability, and importantly, its association with the telomerase RNA component (TR). Using mass spectrometry, immunoprecipitation, and immunofluorescence experiments we found that SUMO1-Menin decreases TR's association with telomerase subunit Dyskerin, suggesting that Fyn's phosphorylation of Menin induces telomerase subunit mislocalization and may compromise telomerase function at telomeres. Importantly, we find that Fyn inhibition reduces accelerated telomere shortening in human iPSCs harboring mutations for dyskeratosis congenita.
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Affiliation(s)
- Souren Paul
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| | - Preston M. McCourt
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| | - Le Thi My Le
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| | - Joohyun Ryu
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
- Department of Laboratory Medicine and Pathology, University of Minnesota School of Medicine, Minneapolis, MN, USA
| | - Wioletta Czaja
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
- Department of Genetics, University of Alabama, Birmingham, AL 35294, USA
| | - Ann M. Bode
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| | - Rafael Contreras-Galindo
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
- Department of Genetics, University of Alabama, Birmingham, AL 35294, USA
| | - Zigang Dong
- Department of Pathophysiology, School of Basic Medical Sciences, College of Medicine, Zhengzhou University, Henan, China 450001
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Henriques CM, Ferreira MG. Telomere length is an epigenetic trait - Implications for the use of telomerase-deficient organisms to model human disease. Dis Model Mech 2024; 17:dmm050581. [PMID: 38441152 PMCID: PMC10941657 DOI: 10.1242/dmm.050581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024] Open
Abstract
Telomere length, unlike most genetic traits, is epigenetic, in the sense that it is not fully coded by the genome. Telomeres vary in length and randomly assort to the progeny leaving some individuals with longer and others with shorter telomeres. Telomerase activity counteracts this by extending telomeres in the germline and during embryogenesis but sizeable variances remain in telomere length. This effect is exacerbated by the absence of fully active telomerase. Telomerase heterozygous animals (tert+/-) have reduced telomerase activity and their telomeres fail to be elongated to wild-type average length, meaning that - with every generation - they decrease. After a given number of successive generations of telomerase-insufficient crosses, telomeres become critically short and cause organismal defects that, in humans, are known as telomere biology disorders. Importantly, these defects also occur in wild-type (tert+/+) animals derived from such tert+/- incrosses. Despite these tert+/+ animals being proficient for telomerase, they have shorter than average telomere length and, although milder, develop phenotypes that are similar to those of telomerase mutants. Here, we discuss the impact of this phenomenon on human pathologies associated with telomere length, provide a brief overview of telomere biology across species and propose specific measures for working with telomerase-deficient zebrafish.
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Affiliation(s)
- Catarina M. Henriques
- The Bateson Centre, MRC-Arthritis Research UK Centre for Integrated Research Into Musculoskeletal Ageing (CIMA) and Healthy Lifespan Institute (HELSI), School of Medicine and Population Health, University of Sheffield, Sheffield S10 2TN, UK
| | - Miguel Godinho Ferreira
- Institute for Research on Cancer and Aging of Nice (IRCAN), CNRS UMR7284, INSERM U1081, Université Côte d‘Azur, 06107 Nice, France
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Westin ER, Khodadadi-Jamayran A, Pham LK, Tung ML, Goldman FD. CRISPR screen identifies CEBPB as contributor to dyskeratosis congenita fibroblast senescence via augmented inflammatory gene response. G3 (Bethesda) 2023; 13:jkad207. [PMID: 37717172 PMCID: PMC10627266 DOI: 10.1093/g3journal/jkad207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/16/2023] [Accepted: 08/17/2023] [Indexed: 09/18/2023]
Abstract
Aging is the consequence of intra- and extracellular events that promote cellular senescence. Dyskeratosis congenita (DC) is an example of a premature aging disorder caused by underlying telomere/telomerase-related mutations. Cells from these patients offer an opportunity to study telomere-related aging and senescence. Our previous work has found that telomere shortening stimulates DNA damage responses (DDRs) and increases reactive oxygen species (ROS), thereby promoting entry into senescence. This work also found that telomere elongation via TERT expression, the catalytic component of the telomere-elongating enzyme telomerase, or p53 shRNA could decrease ROS by disrupting this telomere-DDR-ROS pathway. To further characterize this pathway, we performed a CRISPR/Cas9 knockout screen to identify genes that extend life span in DC cells. Of the cellular clones isolated due to increased life span, 34% had a guide RNA (gRNA) targeting CEBPB, while gRNAs targeting WSB1, MED28, and p73 were observed multiple times. CEBPB is a transcription factor associated with activation of proinflammatory response genes suggesting that inflammation may be present in DC cells. The inflammatory response was investigated using RNA sequencing to compare DC and control cells. Expression of inflammatory genes was found to be significantly elevated (P < 0.0001) in addition to a key subset of these inflammation-related genes [IL1B, IL6, IL8, IL12A, CXCL1 (GROa), CXCL2 (GROb), and CXCL5]. which are regulated by CEBPB. Exogenous TERT expression led to downregulation of RNA/protein CEBPB expression and the inflammatory response genes suggesting a telomere length-dependent mechanism to regulate CEBPB. Furthermore, unlike exogenous TERT and p53 shRNA, CEBPB shRNA did not significantly decrease ROS suggesting that CEBPB's contribution in DC cells' senescence is ROS independent. Our findings demonstrate a key role for CEBPB in engaging senescence by mobilizing an inflammatory response within DC cells.
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Affiliation(s)
- Erik R Westin
- Department of Pediatrics, Division of Hematology Oncology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Department of Cancer Precision Medicine, Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA 70808, USA
| | - Alireza Khodadadi-Jamayran
- Genome Technology Center, Applied Bioinformatics Laboratories, NYU Langone Medical Center, New York, NY 10016, USA
| | - Linh K Pham
- Department of Pediatrics, Division of Hematology Oncology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Moon Ley Tung
- Stead Family Department of Pediatrics, Division of Medical Genetics and Genomics, University of Iowa, Iowa City, IA 52242, USA
| | - Frederick D Goldman
- Department of Pediatrics, Division of Hematology Oncology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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Yan J, Jin T, Wang L. Hematopoietic stem cell transplantation of aplastic anemia by relative with mutations and normal telomere length: A case report. World J Clin Cases 2023; 11:7200-7206. [PMID: 37946752 PMCID: PMC10631418 DOI: 10.12998/wjcc.v11.i29.7200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 09/09/2023] [Accepted: 09/26/2023] [Indexed: 10/13/2023] Open
Abstract
BACKGROUND Immunosuppressive therapy and matched sibling donor hematopoietic stem cell transplantation (MSD-HSCT) are the preferred treatments for aplastic anemia (AA). CASE SUMMARY In this report, we describe a 43-year-old male patient with severe AA who carried BRIP1 (also known as FANCJ), TINF2, and TCIRG1 mutations. Screening of the family pedigree revealed the same TINF2 mutation in his mother and older brother, with his older brother also carrying the BRIP1 variant and demonstrating normal telomere length and hematopoietic function. The patient was successfully treated with oral cyclosporine A, eltrombopag, and acetylcysteine, achieving remission 4 years after receiving MSD-HSCT from his older brother. CONCLUSION This case provides a valuable clinical reference for individuals with suspected pathogenic gene mutations, normal telomere length, and hematopoietic function, highlighting them as potential donors for patients with AA.
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Affiliation(s)
- Jin Yan
- School of Medicine, Jianghan University, Wuhan 430056, Hubei Province, China
- Department of Hematology, The Central Hospital of Wuhan, Wuhan 430014, Hubei Province, China
| | - Ting Jin
- Department of Hematology, The Central Hospital of Wuhan, Wuhan 430014, Hubei Province, China
| | - Li Wang
- Department of Hematology, The Central Hospital of Wuhan, Wuhan 430014, Hubei Province, China
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Martínez-Balsalobre E, García-Castillo J, García-Moreno D, Naranjo-Sánchez E, Fernández-Lajarín M, Blasco MA, Alcaraz-Pérez F, Mulero V, Cayuela ML. Telomerase RNA-based aptamers restore defective myelopoiesis in congenital neutropenic syndromes. Nat Commun 2023; 14:5912. [PMID: 37737237 PMCID: PMC10516865 DOI: 10.1038/s41467-023-41472-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 09/06/2023] [Indexed: 09/23/2023] Open
Abstract
Telomerase RNA (TERC) has a noncanonical function in myelopoiesis binding to a consensus DNA binding sequence and attracting RNA polymerase II (RNA Pol II), thus facilitating myeloid gene expression. The CR4/CR5 domain of TERC is known to play this role, since a mutation of this domain found in dyskeratosis congenita (DC) patients decreases its affinity for RNA Pol II, impairing its myelopoietic activity as a result. In this study, we report that two aptamers, short single-stranded oligonucleotides, based on the CR4/CR5 domain were able to increase myelopoiesis without affecting erythropoiesis in zebrafish. Mechanistically, the aptamers functioned as full terc; that is, they increased the expression of master myeloid genes, independently of endogenous terc, by interacting with RNA Pol II and with the terc-binding sequences of the regulatory regions of such genes, enforcing their transcription. Importantly, aptamers harboring the CR4/CR5 mutation that was found in DC patients failed to perform all these functions. The therapeutic potential of the aptamers for treating neutropenia was demonstrated in several preclinical models. The findings of this study have identified two potential therapeutic agents for DC and other neutropenic patients.
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Affiliation(s)
- Elena Martínez-Balsalobre
- Grupo de Telomerasa, Cáncer y Envejecimiento, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain
- Instituto Murciano de Investigación Biosanitaria (IMIB) Pascual Parrilla, 30120, Murcia, Spain
- Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, 28029, Madrid, Spain
| | - Jesús García-Castillo
- Grupo de Telomerasa, Cáncer y Envejecimiento, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain
- Instituto Murciano de Investigación Biosanitaria (IMIB) Pascual Parrilla, 30120, Murcia, Spain
| | - Diana García-Moreno
- Grupo de Telomerasa, Cáncer y Envejecimiento, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain
- Instituto Murciano de Investigación Biosanitaria (IMIB) Pascual Parrilla, 30120, Murcia, Spain
- Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, 28029, Madrid, Spain
| | - Elena Naranjo-Sánchez
- Grupo de Telomerasa, Cáncer y Envejecimiento, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain
- Instituto Murciano de Investigación Biosanitaria (IMIB) Pascual Parrilla, 30120, Murcia, Spain
- Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, 28029, Madrid, Spain
| | - Miriam Fernández-Lajarín
- Grupo de Telomerasa, Cáncer y Envejecimiento, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain
- Instituto Murciano de Investigación Biosanitaria (IMIB) Pascual Parrilla, 30120, Murcia, Spain
- Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, 28029, Madrid, Spain
| | - María A Blasco
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre (CNIO), Melchor Fernández Almagro 3, 28029, Madrid, Spain
| | - Francisca Alcaraz-Pérez
- Grupo de Telomerasa, Cáncer y Envejecimiento, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain.
- Instituto Murciano de Investigación Biosanitaria (IMIB) Pascual Parrilla, 30120, Murcia, Spain.
- Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, 28029, Madrid, Spain.
| | - Victoriano Mulero
- Instituto Murciano de Investigación Biosanitaria (IMIB) Pascual Parrilla, 30120, Murcia, Spain.
- Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, 28029, Madrid, Spain.
| | - María L Cayuela
- Grupo de Telomerasa, Cáncer y Envejecimiento, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain.
- Instituto Murciano de Investigación Biosanitaria (IMIB) Pascual Parrilla, 30120, Murcia, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, 28029, Madrid, Spain.
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Naarmann-de Vries IS, Zorbas C, Lemsara A, Piechotta M, Ernst FGM, Wacheul L, Lafontaine DLJ, Dieterich C. Comprehensive identification of diverse ribosomal RNA modifications by targeted nanopore direct RNA sequencing and JACUSA2. RNA Biol 2023; 20:652-665. [PMID: 37635368 PMCID: PMC10464549 DOI: 10.1080/15476286.2023.2248752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/29/2023] Open
Abstract
Ribosomal RNAs are decorated by numerous post-transcriptional modifications whose exact roles in ribosome biogenesis, function, and human pathophysiology remain largely unknown. Here, we report a targeted direct rRNA sequencing approach involving a substrate selection step and demonstrate its suitability to identify differential modification sites in combination with the JACUSA2 software. We compared JACUSA2 to other tools designed for RNA modification detection and show that JACUSA2 outperforms other software with regard to detection of base modifications such as methylation, acetylation and aminocarboxypropylation. To illustrate its widespread usability, we applied our method to a collection of CRISPR-Cas9 engineered colon carcinoma cells lacking specific enzymatic activities responsible for particular rRNA modifications and systematically compared them to isogenic wild-type RNAs. Besides the numerous 2'-O methylated riboses and pseudouridylated residues, our approach was suitable to reliably identify differential base methylation and acetylation events. Importantly, our method does not require any prior knowledge of modification sites or the need to train complex models. We further report for the first time detection of human rRNA modifications by direct RNA-sequencing on Flongle flow cells, the smallest-scale nanopore flow cell available to date. The use of these smaller flow cells reduces RNA input requirements, making our workflow suitable for the analysis of samples with limited availability and clinical work.
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Affiliation(s)
- Isabel S. Naarmann-de Vries
- Section of Bioinformatics and Systems Cardiology, University Hospital Heidelberg, Heidelberg, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Christiane Zorbas
- RNA Molecular Biology, Université libre de Bruxelles (ULB), Fonds de la Recherche Scientifique (F.R.S./FNRS), Gosselies, Belgium
| | - Amina Lemsara
- Section of Bioinformatics and Systems Cardiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Michael Piechotta
- Section of Bioinformatics and Systems Cardiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Felix G. M. Ernst
- RNA Molecular Biology, Université libre de Bruxelles (ULB), Fonds de la Recherche Scientifique (F.R.S./FNRS), Gosselies, Belgium
| | - Ludivine Wacheul
- RNA Molecular Biology, Université libre de Bruxelles (ULB), Fonds de la Recherche Scientifique (F.R.S./FNRS), Gosselies, Belgium
| | - Denis L. J. Lafontaine
- RNA Molecular Biology, Université libre de Bruxelles (ULB), Fonds de la Recherche Scientifique (F.R.S./FNRS), Gosselies, Belgium
| | - Christoph Dieterich
- Section of Bioinformatics and Systems Cardiology, University Hospital Heidelberg, Heidelberg, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
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Babcock SJ, Flores-Marin D, Thiagarajah JR. The genetics of monogenic intestinal epithelial disorders. Hum Genet 2022. [PMID: 36422736 DOI: 10.1007/s00439-022-02501-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 10/23/2022] [Indexed: 11/27/2022]
Abstract
Monogenic intestinal epithelial disorders, also known as congenital diarrheas and enteropathies (CoDEs), are a group of rare diseases that result from mutations in genes that primarily affect intestinal epithelial cell function. Patients with CoDE disorders generally present with infantile-onset diarrhea and poor growth, and often require intensive fluid and nutritional management. CoDE disorders can be classified into several categories that relate to broad areas of epithelial function, structure, and development. The advent of accessible and low-cost genetic sequencing has accelerated discovery in the field with over 45 different genes now associated with CoDE disorders. Despite this increasing knowledge in the causal genetics of disease, the underlying cellular pathophysiology remains incompletely understood for many disorders. Consequently, clinical management options for CoDE disorders are currently limited and there is an urgent need for new and disorder-specific therapies. In this review, we provide a general overview of CoDE disorders, including a historical perspective of the field and relationship to other monogenic disorders of the intestine. We describe the genetics, clinical presentation, and known pathophysiology for specific disorders. Lastly, we describe the major challenges relating to CoDE disorders, briefly outline key areas that need further study, and provide a perspective on the future genetic and therapeutic landscape.
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Papiris SA, Kannengiesser C, Borie R, Kolilekas L, Kallieri M, Apollonatou V, Ba I, Nathan N, Bush A, Griese M, Dieude P, Crestani B, Manali ED. Genetics in Idiopathic Pulmonary Fibrosis: A Clinical Perspective. Diagnostics (Basel) 2022; 12:2928. [PMID: 36552935 PMCID: PMC9777433 DOI: 10.3390/diagnostics12122928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/17/2022] [Accepted: 11/18/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Unraveling the genetic background in a significant proportion of patients with both sporadic and familial IPF provided new insights into the pathogenic pathways of pulmonary fibrosis. AIM The aim of the present study is to overview the clinical significance of genetics in IPF. PERSPECTIVE It is fascinating to realize the so-far underestimated but dynamically increasing impact that genetics has on aspects related to the pathophysiology, accurate and early diagnosis, and treatment and prevention of this devastating disease. Genetics in IPF have contributed as no other in unchaining the disease from the dogma of a "a sporadic entity of the elderly, limited to the lungs" and allowed all scientists, but mostly clinicians, all over the world to consider its many aspects and "faces" in all age groups, including its co-existence with several extra pulmonary conditions from cutaneous albinism to bone-marrow and liver failure. CONCLUSION By providing additional evidence for unsuspected characteristics such as immunodeficiency, impaired mucus, and surfactant and telomere maintenance that very often co-exist through the interaction of common and rare genetic variants in the same patient, genetics have created a generous and pluralistic yet unifying platform that could lead to the understanding of the injurious and pro-fibrotic effects of many seemingly unrelated extrinsic and intrinsic offending factors. The same platform constantly instructs us about our limitations as well as about the heritability, the knowledge and the wisdom that is still missing.
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Affiliation(s)
- Spyros A. Papiris
- 2nd Pulmonary Medicine Department, General University Hospital “Attikon”, Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Caroline Kannengiesser
- Département de Génétique, APHP Hôpital Bichat, Université de Paris, 75018 Paris, France
- INSERM UMR 1152, Université de Paris, 75018 Paris, France
| | - Raphael Borie
- Service de Pneumologie A, INSERM UMR_1152, Centre de Référence des Maladies Pulmonaires Rares, FHU APOLLO, APHP Hôpital Bichat, Sorbonne Université, 75018 Paris, France
| | - Lykourgos Kolilekas
- 7th Pulmonary Department, Athens Chest Hospital “Sotiria”, 11527 Athens, Greece
| | - Maria Kallieri
- 2nd Pulmonary Medicine Department, General University Hospital “Attikon”, Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Vasiliki Apollonatou
- 2nd Pulmonary Medicine Department, General University Hospital “Attikon”, Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Ibrahima Ba
- Département de Génétique, APHP Hôpital Bichat, Université de Paris, 75018 Paris, France
| | - Nadia Nathan
- Peditric Pulmonology Department and Reference Centre for Rare Lung Diseases RespiRare, INSERM UMR_S933 Laboratory of Childhood Genetic Diseases, Armand Trousseau Hospital, Sorbonne University and APHP, 75012 Paris, France
| | - Andrew Bush
- Paediatrics and Paediatric Respirology, Imperial College, Imperial Centre for Paediatrics and Child Health, Royal Brompton Harefield NHS Foundation Trust, London SW3 6NP, UK
| | - Matthias Griese
- Department of Pediatric Pneumology, Dr von Hauner Children’s Hospital, Ludwig-Maximilians-University, German Center for Lung Research, 80337 Munich, Germany
| | - Philippe Dieude
- Department of Rheumatology, INSERM U1152, APHP Hôpital Bichat-Claude Bernard, Université de Paris, 75018 Paris, France
| | - Bruno Crestani
- Service de Pneumologie A, INSERM UMR_1152, Centre de Référence des Maladies Pulmonaires Rares, FHU APOLLO, APHP Hôpital Bichat, Sorbonne Université, 75018 Paris, France
| | - Effrosyni D. Manali
- 2nd Pulmonary Medicine Department, General University Hospital “Attikon”, Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
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9
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Juan HY, Zhou AE, Hoegler KM, Khachemoune A. Overview of familial syndromes with increased skin malignancies. Arch Dermatol Res 2022. [PMID: 36342513 DOI: 10.1007/s00403-022-02447-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 10/21/2022] [Indexed: 11/09/2022]
Abstract
The vast majority of skin cancers can be classified into two main types: melanoma and keratinocyte carcinomas. The most common keratinocyte carcinomas include basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). Multiple familial syndromes have been identified that can increase the risk of developing SCC, BCC, and/or melanoma. The major syndromes include oculocutaneous albinism for SCC, basal cell nevus syndrome for BCC, familial atypical multiple mole-melanoma syndrome, and hereditary breast and ovarian cancer syndrome for melanoma. In addition, familial syndromes that can predispose individuals to all three major skin cancers include xeroderma pigmentosum and Li-Fraumeni syndrome. This review highlights the epidemiology, risk factors, pathogenesis, and etiology of the major and minor syndromes to better identify and manage these conditions. Current investigational trials in genomic medicine are making their way in revolutionizing the clinical diagnosis of these familial syndromes for earlier preventative measures and improvement of long-term prognosis in these patients.
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10
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Hassan A, Mir YR, Kuchay RAH. Ocular findings and genomics of X-linked recessive disorders: A review. Indian J Ophthalmol 2022; 70:2386-2396. [PMID: 35791118 PMCID: PMC9426149 DOI: 10.4103/ijo.ijo_252_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Advent of new sequencing technologies and modern diagnostic procedures has opened the door for a deeper understanding of disorders about which little was known previously. Discovery of novel genes, new genetic variants in previously known genes and better techniques of functional validation has immensely contributed to unraveling the molecular basis of genetic disorders. Availability of knockout animal models like the zebrafish and gene editing tools like CRISPR-Cas9 has elucidated the function of many new genes and helped us to better understand the functional consequences of various gene defects. This has also led to better diagnosis and therapeutic interventions. In this context, a good body of research work has been done on X-linked recessive disorders with ocular findings. This review will focus on ocular and genetic findings of these rare disorders. To our knowledge, this is the first comprehensive review encompassing ocular and genomic spectrum of X-linked recessive disorders.
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Affiliation(s)
- Asima Hassan
- Department of Health and Medical Education, Srinagar, Jammu and Kashmir, India
| | - Yaser R Mir
- Department of Biotechnology, Baba Ghulam Shah Badshah University, Rajouri, Jammu and Kashmir, India
| | - Raja A H Kuchay
- Department of Biotechnology, Baba Ghulam Shah Badshah University, Rajouri, Jammu and Kashmir, India
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Guo Q, Zhang P, Ying W, Wang Y, Zhu J, Li G, Wang H, Wang X, Lei C, Zhou W, Sun J, Wu B. Intron retention by a novel intronic mutation in DKC1 gene caused recurrent still birth and early death in a Chinese family. Mol Genet Genomic Med 2022; 10:e1934. [PMID: 35384376 PMCID: PMC9184655 DOI: 10.1002/mgg3.1934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 02/09/2022] [Accepted: 03/14/2022] [Indexed: 11/06/2022] Open
Abstract
Background DKC1, the dyskerin encoding gene, functions in telomerase activity and telomere maintenance. DKC1 mutations cause a multisystem disease, dyskeratosis congenita (DC), which is associated with immunodeficiency and bone marrow failure. Methods In this research, we reported a novel intronic mutation of DKC1 causing dyskerin functional loss in a Chinese family. Whole exome sequence (WES) of the proband and validation by sanger sequencing help us identify a pathogenic DKC1 mutation. Minigene splicing assays were performed to evaluate functional change of DKC1. Results A pathogenic DKC1 intronic mutation(c.84 + 7A > G) was identified in the proband, which was inherited from heterozygous mother and not reported before. We detected the novel transcript with a 7 bp intron retention through minigene splicing assay. The newly spliced transcript is so short that would be degraded by nonsense‐mediated mRNA decay in vitro and we infer that the novel DKC1 mutation would influences normal physiological function of dyskerin. Conclusions Our study identified a novel intronic mutation, which expands the spectrum of pathogenic DKC1 gene mutations and can be used in molecular diagnosis. The mutant allele was transmitted to the next generation with high frequency in the family and causes still birth or early death.
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Affiliation(s)
- Qiufang Guo
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China.,Berry Genomics Co., Beijing, China
| | - Ping Zhang
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Wenjing Ying
- Department of Allergy and Clinical Immunology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Yaqiong Wang
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Jitao Zhu
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Gang Li
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Huijun Wang
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Xiaochuan Wang
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Caixia Lei
- Prenatal Diagnosis Center, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Wenhao Zhou
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Jinqiao Sun
- Department of Allergy and Clinical Immunology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Bingbing Wu
- Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
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Steinbusch MMF, van den Akker GGH, Cremers A, Witlox AMA, Staal HM, Peffers MJ, van Rhijn LW, Caron MMJ, Welting TJM. Adaptation of the protein translational apparatus during ATDC5 chondrogenic differentiation. Noncoding RNA Res 2022; 7:55-65. [PMID: 35261930 PMCID: PMC8881200 DOI: 10.1016/j.ncrna.2022.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/10/2022] [Accepted: 02/13/2022] [Indexed: 11/05/2022] Open
Abstract
Introduction Ribosome biogenesis is integrated with many cellular processes including proliferation, differentiation and oncogenic events. Chondrogenic proliferation and differentiation require a high cellular translational capacity to facilitate cartilaginous extracellular matrix production. We here investigated the expression dynamics of factors involved in ribosome biogenesis during in vitro chondrogenic differentiation and determined whether protein translation capacity adapts to different phases of chondrogenic differentiation. Materials SnoRNA expression during ATDC5 differentiation was analyzed by RNA sequencing of samples acquired from day 0 (progenitor stage), 7 (chondrogenic stage) and day 14 (hypertrophic stage). RT-qPCR was used to determine expression of fibrillarin, dyskerin, UBF-1, Sox9, Col2a1, Runx2, Col10a1 mRNAs and 18S, 5.8S and 28S rRNAs. Protein expression of fibrillarin, dyskerin and UBF-1 was determined by immunoblotting. Ribosomal RNA content per cell was determined by calculating rRNA RT-qPCR signals relative to DNA content (SYBR Green assay). Total protein translational activity was evaluated with a puromycilation assay and polysome profiling. Results As a result of initiation of chondrogenic differentiation (Δt0-t7), 21 snoRNAs were differentially expressed (DE). Hypertrophic differentiation caused DE of 23 snoRNAs (Δt7-t14) and 43 when t0 was compared to t14. DE snoRNAs, amongst others, target nucleotide modifications in the 28S rRNA peptidyl transferase center and the 18S rRNA decoding center. UBF-1, fibrillarin and dyskerin expression increased as function of differentiation and displayed highest fold induction at day 5-6 in differentiation. Ribosomal RNA content per cell was significantly increased at day 7, but not at day 14 in differentiation. Similar dynamics in translational capacity and monosomal ribosome fraction were observed during differentiation. Conclusion The expression of a great number of ribosome biogenesis factors is altered during chondrogenic differentiation of ATDC5 cells, which is accompanied by significant changes in cellular translational activity. This elucidation of ribosome biogenesis dynamics in chondrogenic differentiation models enables the further understanding of the role of ribosome biogenesis and activity during chondrocyte cell commitment and their roles in human skeletal development diseases.
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Affiliation(s)
- Mandy M F Steinbusch
- Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands
| | - Guus G H van den Akker
- Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands
| | - Andy Cremers
- Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands
| | - Adhiambo M A Witlox
- Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University Medical Center, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands
| | - Heleen M Staal
- Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University Medical Center, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands
| | - Mandy J Peffers
- Department of Musculoskeletal Biology, Institute of Life Course and Medical Sciences, University of Liverpool, William Henry Duncan Building, 6 West Derby Street, L7 8TX, Liverpool, United Kingdom
| | - Lodewijk W van Rhijn
- Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University Medical Center, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands
| | - Marjolein M J Caron
- Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands
| | - Tim J M Welting
- Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands.,Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery, Maastricht University Medical Center, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands
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Dorgaleleh S, Naghipoor K, Hajimohammadi Z, Dastaviz F, Oladnabi M. Molecular insight of dyskeratosis congenita: Defects in telomere length homeostasis. J Clin Transl Res 2022; 8:20-30. [PMID: 35097237 PMCID: PMC8791241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 09/23/2021] [Accepted: 12/03/2021] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Dyskeratosis congenita (DC) is a rare disease and is a heterogenous disorder, with its inheritance patterns as autosomal dominant, autosomal recessive, and X-linked recessive. This disorder occurs due to faulty maintenance of telomeres in stem cells. This congenital condition is diagnosed with three symptoms: oral leukoplakia, nail dystrophy, and abnormal skin pigmentation. However, because it has a wide range of symptoms, it may have phenotypes similar to other diseases. For this reason, it is necessary to use methods of measuring the Telomere Length (TL) and determining the shortness of the telomere in these patients so that it can be distinguished from other diseases. Today, the Next Generation Sequencing technique accurately detects mutations in the target genes. AIM This work aims to review and summarize how each of the DC genes is involved in TL, and how to diagnose and differentiate the disease using clinical signs and methods to measure TL. It also offers treatments for DC patients, such as Hematopoietic Stem Cell Transplantation and Androgen therapy. RELEVANCE FOR PATIENTS In DC patients, the genes involved in telomere homeostasis are mutated. Because these patients may have an overlapping phenotype with other diseases, it is best to perform whole-exome sequencing after genetics counseling to find the relevant mutation. As DC is a multi-systemic disease, we need to monitor patients frequently through annual lung function tests, ultrasounds, gynecological examinations, and skin examinations.
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Affiliation(s)
- Saeed Dorgaleleh
- 1Student Research Committee, Golestan University of Medical Sciences, Gorgan, Iran
| | - Karim Naghipoor
- 1Student Research Committee, Golestan University of Medical Sciences, Gorgan, Iran
| | - Zahra Hajimohammadi
- 2Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Farzad Dastaviz
- 1Student Research Committee, Golestan University of Medical Sciences, Gorgan, Iran
| | - Morteza Oladnabi
- 3Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran,4Gorgan Congenital Malformations Research Center, Golestan University of Medical Sciences, Gorgan, Iran,
Corresponding author: Morteza Oladnabi Department of Medical Genetics, School of Advanced Technologies in Medicine, Golestan University of Medical Sciences, Gorgan, Iran. Tel: +981732459995
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Brahmbhatt V, Singla P, Parmar K, Shah B. An interesting case report on zinsser-engman-cole syndrome “a telomeropathy” along with ventricular septal defect. Indian J Paediatr Dermatol 2022. [DOI: 10.4103/ijpd.ijpd_94_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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15
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Liu AQ, Deane EC, Prisman E, Durham JS. Dyskeratosis Congenita and Squamous Cell Cancer of the Head and Neck: A Case Report and Systematic Review. Ann Otol Rhinol Laryngol 2021; 131:1036-1042. [PMID: 34651516 PMCID: PMC9340128 DOI: 10.1177/00034894211047470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Objectives: Dyskeratosis congenita (DC) is a progressive congenital disorder that predisposes patients to squamous cell cancers (SCC) of the head and neck. We report a case of a patient who underwent primary osteocutaneous free flap for mandibular SCC followed by additional treatments for positive margins and discuss a systematic review on therapeutic management for this patient population. Methods: Case report of a 39-year-old male with DC who underwent resection and reconstruction with a fibular free flap for mandible SCC, followed by revision surgery and adjuvant radiotherapy for positive margins. A systematic review was completed afterward with the following terms: “dyskeratosis congenita” AND “oral cancer” OR “head and neck” OR “otolaryngology” on Medline and Web of Science for articles between 1980 and 2021. In total, 12 articles were included that reported on DC and SCC in the head and neck. Results: Of the case reports that were included in this review, half the patients had recurrence within 1 year of primary treatments. Only 2 patients did not require revision surgery, adjuvant, or salvage therapy. Half of patients that received radiation therapy had severe side effects. Conclusions: This is the largest review of DC and SCC in the head and neck. Based off our case report and review, these patients have aggressive disease that often requires multi-modality treatment. Consideration should be taken in regards to reports of side effects with radiation therapy.
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Affiliation(s)
- Alice Q Liu
- Division of Otolaryngology-Head & Neck Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Emily C Deane
- Division of Otolaryngology-Head & Neck Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Eitan Prisman
- Division of Otolaryngology-Head & Neck Surgery, University of British Columbia, Vancouver, BC, Canada
| | - J Scott Durham
- Division of Otolaryngology-Head & Neck Surgery, University of British Columbia, Vancouver, BC, Canada
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Kang J, Brajanovski N, Chan KT, Xuan J, Pearson RB, Sanij E. Ribosomal proteins and human diseases: molecular mechanisms and targeted therapy. Signal Transduct Target Ther 2021; 6:323. [PMID: 34462428 PMCID: PMC8405630 DOI: 10.1038/s41392-021-00728-8] [Citation(s) in RCA: 99] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 07/12/2021] [Accepted: 07/30/2021] [Indexed: 02/07/2023] Open
Abstract
Ribosome biogenesis and protein synthesis are fundamental rate-limiting steps for cell growth and proliferation. The ribosomal proteins (RPs), comprising the structural parts of the ribosome, are essential for ribosome assembly and function. In addition to their canonical ribosomal functions, multiple RPs have extra-ribosomal functions including activation of p53-dependent or p53-independent pathways in response to stress, resulting in cell cycle arrest and apoptosis. Defects in ribosome biogenesis, translation, and the functions of individual RPs, including mutations in RPs have been linked to a diverse range of human congenital disorders termed ribosomopathies. Ribosomopathies are characterized by tissue-specific phenotypic abnormalities and higher cancer risk later in life. Recent discoveries of somatic mutations in RPs in multiple tumor types reinforce the connections between ribosomal defects and cancer. In this article, we review the most recent advances in understanding the molecular consequences of RP mutations and ribosomal defects in ribosomopathies and cancer. We particularly discuss the molecular basis of the transition from hypo- to hyper-proliferation in ribosomopathies with elevated cancer risk, a paradox termed "Dameshek's riddle." Furthermore, we review the current treatments for ribosomopathies and prospective therapies targeting ribosomal defects. We also highlight recent advances in ribosome stress-based cancer therapeutics. Importantly, insights into the mechanisms of resistance to therapies targeting ribosome biogenesis bring new perspectives into the molecular basis of cancer susceptibility in ribosomopathies and new clinical implications for cancer therapy.
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Affiliation(s)
- Jian Kang
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Natalie Brajanovski
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia
| | - Keefe T. Chan
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Jiachen Xuan
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Richard B. Pearson
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia ,grid.1002.30000 0004 1936 7857Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Biochemistry and Molecular Biology, University of Melbourne, Melbourne, VIC Australia
| | - Elaine Sanij
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Clinical Pathology, University of Melbourne, Melbourne, VIC Australia ,grid.1073.50000 0004 0626 201XSt. Vincent’s Institute of Medical Research, Fitzroy, VIC Australia
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Rieckher M, Garinis GA, Schumacher B. Molecular pathology of rare progeroid diseases. Trends Mol Med 2021; 27:907-922. [PMID: 34272172 DOI: 10.1016/j.molmed.2021.06.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/18/2021] [Accepted: 06/22/2021] [Indexed: 12/21/2022]
Abstract
Progeroid syndromes (PSs) are characterized by the premature onset of age-related pathologies. The genetic mutations underlying PSs are functionally linked to genome maintenance and repair, supporting the causative role of DNA damage accumulation in aging. Recent advances from studies in animal models of PSs have provided new insight into the role of DNA repair mechanisms in human disease and the physiological adaptations to accumulating DNA damage during aging. The molecular pathology of PSs is reminiscent of the natural aging process, highlighting the relevance for a wide range of age-related diseases. Recent progress has led to the development of novel therapeutic strategies against age-related diseases that are relevant to rare diseases as well as the general aging population.
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Affiliation(s)
- Matthias Rieckher
- Institute for Genome Stability in Aging and Disease, Medical Faculty, University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany; Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD) and Center for Molecular Medicine (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany
| | - George A Garinis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, GR70013, Heraklion, Crete, Greece; Department of Biology, University of Crete, Heraklion, Crete, Greece
| | - Björn Schumacher
- Institute for Genome Stability in Aging and Disease, Medical Faculty, University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany; Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD) and Center for Molecular Medicine (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany.
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Kan G, Wang Z, Sheng C, Chen G, Yao C, Mao Y, Chen S. Dual Inhibition of DKC1 and MEK1/2 Synergistically Restrains the Growth of Colorectal Cancer Cells. Adv Sci (Weinh) 2021; 8:2004344. [PMID: 34026451 PMCID: PMC8132060 DOI: 10.1002/advs.202004344] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/28/2021] [Indexed: 05/09/2023]
Abstract
Colorectal cancer, one of the most commonly diagnosed cancers worldwide, is often accompanied by uncontrolled proliferation of tumor cells. Dyskerin pseudouridine synthase 1 (DKC1), screened using the genome-wide RNAi strategy, is a previously unidentified key regulator that promotes colorectal cancer cell proliferation. Enforced expression of DKC1, but not its catalytically inactive mutant D125A, accelerates cell growth in vitro and in vivo. DKC1 knockdown or its inhibitor pyrazofurin attenuates cell proliferation. Proteomics, RNA immunoprecipitation (RIP)-seq, and RNA decay analyses reveal that DKC1 binds to and stabilizes the mRNA of several ribosomal proteins (RPs), including RPL10A, RPL22L1, RPL34, and RPS3. DKC1 depletion significantly accelerates mRNA decay of these RPs, which mediates the oncogenic function of DKC1. Interestingly, these DKC1-regulated RPs also interact with HRAS and suppress the RAS/RAF/MEK/ERK pathway. Pyrazofurin and trametinib combination synergistically restrains colorectal cancer cell growth in vitro and in vivo. Furthermore, DKC1 is markedly upregulated in colorectal cancer tissues compared to adjacent normal tissues. Colorectal cancer patients with higher DKC1 expression has consistently poorer overall survival and progression-free survival outcomes. Taken together, these data suggest that DKC1 is an essential gene and candidate therapeutic target for colorectal cancer.
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Affiliation(s)
- Guangyan Kan
- State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouGuangdong510060P. R. China
| | - Ziyang Wang
- State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouGuangdong510060P. R. China
| | - Chunjie Sheng
- State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouGuangdong510060P. R. China
| | - Gong Chen
- Department of Colorectal SurgeryState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouGuangdong510060P. R. China
| | - Chen Yao
- State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouGuangdong510060P. R. China
| | - Yizhi Mao
- State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouGuangdong510060P. R. China
| | - Shuai Chen
- State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouGuangdong510060P. R. China
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Kan G, Wang Z, Sheng C, Yao C, Mao Y, Chen S. Inhibition of DKC1 induces telomere-related senescence and apoptosis in lung adenocarcinoma. J Transl Med 2021; 19:161. [PMID: 33879171 PMCID: PMC8056518 DOI: 10.1186/s12967-021-02827-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 04/12/2021] [Indexed: 12/25/2022] Open
Abstract
Background Lung cancer is one of the most widely spread cancers in the world and half of the non-small cell lung cancers are lung adenocarcinoma (LUAD). Although there were several drugs been approved for LUAD therapy, a large portion of LUAD still cannot be effectively treated due to lack of available therapeutic targets. Here, we investigated the oncogenic roles of DKC1 in LUAD and its potential mechanism and explored the possibility of targeting DKC1 for LUAD therapy. Methods The Gene Expression Omnibus (GEO) and The Cancer Genome Atlas Program (TCGA) databases were used to examine the DKC1 transcript levels. Gene expression with clinical information from tissue microarray of LUAD were analyzed for associations between DKC1 expression and LUAD prognosis. In addition, loss- and gain-of-function assays were used for oncogenic function of DKC1 both in vitro and in vivo. Results DKC1 is overexpressed in LUAD compared with adjacent normal tissues. High expression of DKC1 predicts the poor overall survival. DKC1 knockdown in LUAD cell lines induced G1 phase arrest and inhibited cell proliferation. Ectopic expression of DKC1 could rescue the growth of LUAD cell lines. In addition, the abundance of DKC1 is positively correlated with telomerase RNA component (TERC) and telomerase reverse transcriptase (TERT) levels in LUAD. DKC1 downregulation resulted in decreased TERC expression, reduced telomerase activity and shorten telomere, and thus eventually led to cell senescence and apoptosis. Conclusions Our results show that high DKC1 expression indicates poor prognosis of LUAD and DKC1 downregulation could induce telomere-related cell senescence and apoptosis. This study suggests that DKC1 could serve as a candidate diagnostic biomarker and therapeutic target for LUAD. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-02827-0.
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Affiliation(s)
- Guangyan Kan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong, People's Republic of China
| | - Ziyang Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong, People's Republic of China
| | - Chunjie Sheng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong, People's Republic of China
| | - Chen Yao
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong, People's Republic of China
| | - Yizhi Mao
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong, People's Republic of China
| | - Shuai Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong, People's Republic of China.
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Rayinda T, van Steensel M, Danarti R. Inherited skin disorders presenting with poikiloderma. Int J Dermatol 2021; 60:1343-1353. [PMID: 33739439 DOI: 10.1111/ijd.15498] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 01/05/2021] [Accepted: 02/08/2021] [Indexed: 11/28/2022]
Abstract
Poikiloderma is a skin condition that combines atrophy, telangiectasia, and macular pigment changes (hypo- as well as hyperpigmentation). It is often mistaken for mottled pigmentation by general practitioners or nondermatology specialists. Poikiloderma can be a key presenting symptom of Rothmund-Thomson syndrome (RTS), dyskeratosis congenita (DC), hereditary sclerosing poikiloderma (HSP), hereditary fibrosing poikiloderma with tendon contractures, myopathy, and pulmonary fibrosis (POIKTMP), xeroderma pigmentosum (XP), Bloom syndrome (BS), Kindler syndrome (KS), and Clericuzio-type poikiloderma with neutropenia (PN). In these conditions, poikiloderma starts early in life, usually before the second or third year. They may also be associated with photosensitivity and other significant multi-organ manifestation developed later in life. Poikiloderma could indicate the presence of a genetic disorder with potentially serious consequences. Poikiloderma almost always precedes more severe manifestations of these genodermatoses. Prompt diagnosis at the time of presentation could help to prevent complications and mitigate the course of the disease. This review discusses these to help the practicing clinician manage patients presenting with the symptom. To further facilitate early recognition, this paper also proposes a simple diagnostic algorithm.
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Affiliation(s)
- Tuntas Rayinda
- Department of Dermatology and Venereology, Faculty of Medicine, Public Health, and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Maurice van Steensel
- Skin Research Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.,National Skin Center, Singapore, Singapore
| | - Retno Danarti
- Department of Dermatology and Venereology, Faculty of Medicine, Public Health, and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
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21
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Jh K, Cs K. Squamous cell carcinoma of the tongue in 5-year-old girl with dyskeratosis congenita. Int J Oral Maxillofac Surg 2021; 50:1546-1549. [PMID: 33736925 DOI: 10.1016/j.ijom.2021.02.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/17/2020] [Accepted: 02/25/2021] [Indexed: 12/21/2022]
Abstract
Dyskeratosis congenita is a rare inherited bone marrow failure syndrome with three distinct clinical features: nail dystrophy, reticular skin pigmentation, and oral leukoplakia. The case of a 5-year-old female patient diagnosed with squamous cell carcinoma of the tongue is reported here. An autosomal dominant type 3 TINF2 mutation subsequently confirmed the diagnosis of dyskeratosis congenita. The traditional tongue cancer treatment was adapted for this young patient. While the tongue cancer lesions and leukoplakia were removed, the deep margins were minimized to preserve the tongue muscles and flap surgery was avoided. Additional conservative measures were applied to suppress new leukoplakia lesions.
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Affiliation(s)
- Kim Jh
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kim Cs
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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22
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Crisà E, Boggione P, Nicolosi M, Mahmoud AM, Al Essa W, Awikeh B, Aspesi A, Andorno A, Boldorini R, Dianzani I, Gaidano G, Patriarca A. Genetic Predisposition to Myelodysplastic Syndromes: A Challenge for Adult Hematologists. Int J Mol Sci 2021; 22:ijms22052525. [PMID: 33802366 PMCID: PMC7959319 DOI: 10.3390/ijms22052525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 12/17/2022] Open
Abstract
Myelodysplastic syndromes (MDS) arising in the context of inherited bone marrow failure syndromes (IBMFS) differ in terms of prognosis and treatment strategy compared to MDS occurring in the adult population without an inherited genetic predisposition. The main molecular pathways affected in IBMFS involve telomere maintenance, DNA repair, biogenesis of ribosomes, control of proliferation and others. The increased knowledge on the genes involved in MDS pathogenesis and the wider availability of molecular diagnostic assessment have led to an improvement in the detection of IBMFS genetic predisposition in MDS patients. A punctual recognition of these disorders implies a strict surveillance of the patient in order to detect early signs of progression and promptly offer allogeneic hematopoietic stem cell transplantation, which is the only curative treatment. Moreover, identifying an inherited mutation allows the screening and counseling of family members and directs the choice of donors in case of need for transplantation. Here we provide an overview of the most recent data on MDS with genetic predisposition highlighting the main steps of the diagnostic and therapeutic management. In order to highlight the pitfalls of detecting IBMFS in adults, we report the case of a 27-year-old man affected by MDS with an underlying telomeropathy.
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Affiliation(s)
- Elena Crisà
- Division of Hematology, Department of Translational Medicine, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (P.B.); (M.N.); (A.M.M.); (W.A.E.); (B.A.); (A.P.)
- Correspondence: (E.C.); (G.G.); Tel.: +39-0321-660-655 (E.C. & G.G.); Fax: +39-0321-373-3095 (E.C.)
| | - Paola Boggione
- Division of Hematology, Department of Translational Medicine, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (P.B.); (M.N.); (A.M.M.); (W.A.E.); (B.A.); (A.P.)
| | - Maura Nicolosi
- Division of Hematology, Department of Translational Medicine, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (P.B.); (M.N.); (A.M.M.); (W.A.E.); (B.A.); (A.P.)
| | - Abdurraouf Mokhtar Mahmoud
- Division of Hematology, Department of Translational Medicine, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (P.B.); (M.N.); (A.M.M.); (W.A.E.); (B.A.); (A.P.)
| | - Wael Al Essa
- Division of Hematology, Department of Translational Medicine, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (P.B.); (M.N.); (A.M.M.); (W.A.E.); (B.A.); (A.P.)
| | - Bassel Awikeh
- Division of Hematology, Department of Translational Medicine, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (P.B.); (M.N.); (A.M.M.); (W.A.E.); (B.A.); (A.P.)
| | - Anna Aspesi
- Laboratory of Genetic Pathology, Division of Pathology, Department of Health Sciences, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (A.A.); (I.D.)
| | - Annalisa Andorno
- Division of Pathology, Department of Health Sciences, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (A.A.); (R.B.)
| | - Renzo Boldorini
- Division of Pathology, Department of Health Sciences, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (A.A.); (R.B.)
| | - Irma Dianzani
- Laboratory of Genetic Pathology, Division of Pathology, Department of Health Sciences, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (A.A.); (I.D.)
| | - Gianluca Gaidano
- Division of Hematology, Department of Translational Medicine, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (P.B.); (M.N.); (A.M.M.); (W.A.E.); (B.A.); (A.P.)
- Correspondence: (E.C.); (G.G.); Tel.: +39-0321-660-655 (E.C. & G.G.); Fax: +39-0321-373-3095 (E.C.)
| | - Andrea Patriarca
- Division of Hematology, Department of Translational Medicine, University of Eastern Piedmont and Azienda Ospedaliero-Universitaria Maggiore della Carità, 28100 Novara, Italy; (P.B.); (M.N.); (A.M.M.); (W.A.E.); (B.A.); (A.P.)
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23
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Akincilar SC, Chan CHT, Ng QF, Fidan K, Tergaonkar V. Non-canonical roles of canonical telomere binding proteins in cancers. Cell Mol Life Sci 2021; 78:4235-4257. [PMID: 33599797 PMCID: PMC8164586 DOI: 10.1007/s00018-021-03783-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 12/28/2020] [Accepted: 01/29/2021] [Indexed: 02/06/2023]
Abstract
Reactivation of telomerase is a major hallmark observed in 90% of all cancers. Yet paradoxically, enhanced telomerase activity does not correlate with telomere length and cancers often possess short telomeres; suggestive of supplementary non-canonical roles that telomerase might play in the development of cancer. Moreover, studies have shown that aberrant expression of shelterin proteins coupled with their release from shortening telomeres can further promote cancer by mechanisms independent of their telomeric role. While targeting telomerase activity appears to be an attractive therapeutic option, this approach has failed in clinical trials due to undesirable cytotoxic effects on stem cells. To circumvent this concern, an alternative strategy could be to target the molecules involved in the non-canonical functions of telomeric proteins. In this review, we will focus on emerging evidence that has demonstrated the non-canonical roles of telomeric proteins and their impact on tumorigenesis. Furthermore, we aim to address current knowledge gaps in telomeric protein functions and propose future research approaches that can be undertaken to achieve this.
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Affiliation(s)
- Semih Can Akincilar
- Division of Cancer Genetics and Therapeutics, Laboratory of NFκB Signaling, Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Proteos, 61, Biopolis Drive, Singapore, 138673, Singapore
| | - Claire Hian Tzer Chan
- Division of Cancer Genetics and Therapeutics, Laboratory of NFκB Signaling, Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Proteos, 61, Biopolis Drive, Singapore, 138673, Singapore
| | - Qin Feng Ng
- Division of Cancer Genetics and Therapeutics, Laboratory of NFκB Signaling, Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Proteos, 61, Biopolis Drive, Singapore, 138673, Singapore
| | - Kerem Fidan
- Division of Cancer Genetics and Therapeutics, Laboratory of NFκB Signaling, Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Proteos, 61, Biopolis Drive, Singapore, 138673, Singapore
| | - Vinay Tergaonkar
- Division of Cancer Genetics and Therapeutics, Laboratory of NFκB Signaling, Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Proteos, 61, Biopolis Drive, Singapore, 138673, Singapore.
- Department of Pathology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117593, Singapore.
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24
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Reza AMMT, Yuan YG. microRNAs Mediated Regulation of the Ribosomal Proteins and its Consequences on the Global Translation of Proteins. Cells 2021; 10:110. [PMID: 33435549 PMCID: PMC7827472 DOI: 10.3390/cells10010110] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 12/14/2020] [Indexed: 12/23/2022] Open
Abstract
Ribosomal proteins (RPs) are mostly derived from the energy-consuming enzyme families such as ATP-dependent RNA helicases, AAA-ATPases, GTPases and kinases, and are important structural components of the ribosome, which is a supramolecular ribonucleoprotein complex, composed of Ribosomal RNA (rRNA) and RPs, coordinates the translation and synthesis of proteins with the help of transfer RNA (tRNA) and other factors. Not all RPs are indispensable; in other words, the ribosome could be functional and could continue the translation of proteins instead of lacking in some of the RPs. However, the lack of many RPs could result in severe defects in the biogenesis of ribosomes, which could directly influence the overall translation processes and global expression of the proteins leading to the emergence of different diseases including cancer. While microRNAs (miRNAs) are small non-coding RNAs and one of the potent regulators of the post-transcriptional gene expression, miRNAs regulate gene expression by targeting the 3' untranslated region and/or coding region of the messenger RNAs (mRNAs), and by interacting with the 5' untranslated region, and eventually finetune the expression of approximately one-third of all mammalian genes. Herein, we highlighted the significance of miRNAs mediated regulation of RPs coding mRNAs in the global protein translation.
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Affiliation(s)
- Abu Musa Md Talimur Reza
- Jiangsu Co-Innovation Center of Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China;
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Yu-Guo Yuan
- Jiangsu Co-Innovation Center of Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China;
- Jiangsu Key Laboratory of Zoonosis/Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
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25
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van Moorsel CHM. Putting Genetics Into Practice: Challenges Associated With the Genetics of Short Telomere Syndromes. Chest 2020; 158:2249-2250. [PMID: 33280738 DOI: 10.1016/j.chest.2020.09.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/01/2020] [Accepted: 09/06/2020] [Indexed: 10/22/2022] Open
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26
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Ibáñez-Cabellos JS, Seco-Cervera M, Picher-Latorre C, Pérez-Machado G, García-Giménez JL, Pallardó FV. Acute depletion of telomerase components DKC1 and NOP10 induces oxidative stress and disrupts ribosomal biogenesis via NPM1 and activation of the P53 pathway. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2020; 1867:118845. [DOI: 10.1016/j.bbamcr.2020.118845] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 08/28/2020] [Accepted: 09/02/2020] [Indexed: 02/07/2023]
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27
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Antkowiak M, Green RM. Telomeres, p53, Hepatocyte Nuclear Factor 4α, and Liver Disease. Hepatology 2020; 72:1166-1168. [PMID: 32632978 DOI: 10.1002/hep.31454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 12/07/2022]
Affiliation(s)
- Mark Antkowiak
- Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Richard M Green
- Feinberg School of Medicine, Northwestern University, Chicago, IL
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28
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Affiliation(s)
- Xing-Yun Zhao
- Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, China.,Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen, China
| | - Wei-Long Zhong
- Department of Dermatology, Peking University First Hospital, Beijing, China. E-mail:
| | - Jie Zhang
- Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Gang Ma
- Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Hao Hu
- Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen, China
| | - Bo Yu
- Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, China.,Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen, China
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29
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Bezzerri V, Api M, Allegri M, Fabrizzi B, Corey SJ, Cipolli M. Nonsense Suppression Therapy: New Hypothesis for the Treatment of Inherited Bone Marrow Failure Syndromes. Int J Mol Sci 2020; 21:E4672. [PMID: 32630050 DOI: 10.3390/ijms21134672] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 06/29/2020] [Accepted: 06/29/2020] [Indexed: 12/13/2022] Open
Abstract
Inherited bone marrow failure syndromes (IBMFS) are a group of cancer-prone genetic diseases characterized by hypocellular bone marrow with impairment in one or more hematopoietic lineages. The pathogenesis of IBMFS involves mutations in several genes which encode for proteins involved in DNA repair, telomere biology and ribosome biogenesis. The classical IBMFS include Shwachman–Diamond syndrome (SDS), Diamond–Blackfan anemia (DBA), Fanconi anemia (FA), dyskeratosis congenita (DC), and severe congenital neutropenia (SCN). IBMFS are associated with high risk of myelodysplastic syndrome (MDS), acute myeloid leukemia (AML), and solid tumors. Unfortunately, no specific pharmacological therapies have been highly effective for IBMFS. Hematopoietic stem cell transplantation provides a cure for aplastic or myeloid neoplastic complications. However, it does not affect the risk of solid tumors. Since approximately 28% of FA, 24% of SCN, 21% of DBA, 20% of SDS, and 17% of DC patients harbor nonsense mutations in the respective IBMFS-related genes, we discuss the use of the nonsense suppression therapy in these diseases. We recently described the beneficial effect of ataluren, a nonsense suppressor drug, in SDS bone marrow hematopoietic cells ex vivo. A similar approach could be therefore designed for treating other IBMFS. In this review we explain in detail the new generation of nonsense suppressor molecules and their mechanistic roles. Furthermore, we will discuss strengths and limitations of these molecules which are emerging from preclinical and clinical studies. Finally we discuss the state-of-the-art of preclinical and clinical therapeutic studies carried out for IBMFS.
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30
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Turi Z, Lacey M, Mistrik M, Moudry P. Impaired ribosome biogenesis: mechanisms and relevance to cancer and aging. Aging (Albany NY) 2020; 11:2512-2540. [PMID: 31026227 PMCID: PMC6520011 DOI: 10.18632/aging.101922] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 04/04/2019] [Indexed: 02/06/2023]
Abstract
The biosynthesis of ribosomes is a complex process that requires the coordinated action of many factors and a huge energy investment from the cell. Ribosomes are essential for protein production, and thus for cellular survival, growth and proliferation. Ribosome biogenesis is initiated in the nucleolus and includes: the synthesis and processing of ribosomal RNAs, assembly of ribosomal proteins, transport to the cytoplasm and association of ribosomal subunits. The disruption of ribosome biogenesis at various steps, with either increased or decreased expression of different ribosomal components, can promote cell cycle arrest, senescence or apoptosis. Additionally, interference with ribosomal biogenesis is often associated with cancer, aging and age-related degenerative diseases. Here, we review current knowledge on impaired ribosome biogenesis, discuss the main factors involved in stress responses under such circumstances and focus on examples with clinical relevance.
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Affiliation(s)
- Zsofia Turi
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, 779 00 Olomouc, Czech Republic
| | - Matthew Lacey
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, 779 00 Olomouc, Czech Republic
| | - Martin Mistrik
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, 779 00 Olomouc, Czech Republic
| | - Pavel Moudry
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, 779 00 Olomouc, Czech Republic
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31
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Kampen KR, Sulima SO, Vereecke S, De Keersmaecker K. Hallmarks of ribosomopathies. Nucleic Acids Res 2020; 48:1013-1028. [PMID: 31350888 PMCID: PMC7026650 DOI: 10.1093/nar/gkz637] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/09/2019] [Accepted: 07/12/2019] [Indexed: 12/11/2022] Open
Abstract
Ribosomopathies are diseases caused by defects in ribosomal constituents or in factors with a role in ribosome assembly. Intriguingly, congenital ribosomopathies display a paradoxical transition from early symptoms due to cellular hypo-proliferation to an elevated cancer risk later in life. Another association between ribosome defects and cancer came into view after the recent discovery of somatic mutations in ribosomal proteins and rDNA copy number changes in a variety of tumor types, giving rise to somatic ribosomopathies. Despite these clear connections between ribosome defects and cancer, the molecular mechanisms by which defects in this essential cellular machinery are oncogenic only start to emerge. In this review, the impact of ribosomal defects on the cellular function and their mechanisms of promoting oncogenesis are described. In particular, we discuss the emerging hallmarks of ribosomopathies such as the appearance of ‘onco-ribosomes’ that are specialized in translating oncoproteins, dysregulation of translation-independent extra-ribosomal functions of ribosomal proteins, rewired cellular protein and energy metabolism, and extensive oxidative stress leading to DNA damage. We end by integrating these findings in a model that can provide an explanation how ribosomopathies could lead to the transition from hypo- to hyper-proliferation in bone marrow failure syndromes with elevated cancer risk.
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Affiliation(s)
- Kim R Kampen
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, 3000 Leuven, Belgium
| | - Sergey O Sulima
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, 3000 Leuven, Belgium
| | - Stijn Vereecke
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, 3000 Leuven, Belgium
| | - Kim De Keersmaecker
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, 3000 Leuven, Belgium
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32
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Abstract
Genetic loci are non-randomly arranged in the nucleus of the cell. This order, which is important to overall genome expression and stability, is maintained by a growing number of factors including the nuclear envelope, various genetic elements and dedicated protein complexes. Here, we review evidence supporting roles for non-coding RNAs (ncRNAs) in the regulation of spatial genome organization and its impact on gene expression and cell survival. Specifically, we discuss how ncRNAs from single-copy and repetitive DNA loci contribute to spatial genome organization by impacting perinuclear chromosome tethering, major nuclear compartments, chromatin looping, and various chromosomal structures. Overall, our analysis of the literature highlights central functions for ncRNAs and their transcription in the modulation of spatial genome organization with connections to human health and disease.
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Affiliation(s)
- Negin Khosraviani
- Department of Laboratory Medicine and Pathobiology, MaRS Centre, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Lauren A. Ostrowski
- Department of Laboratory Medicine and Pathobiology, MaRS Centre, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Karim Mekhail
- Department of Laboratory Medicine and Pathobiology, MaRS Centre, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Canada Research Chairs Program, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
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33
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Pinna R, Cocco F, Campus G, Conti G, Milia E, Sardella A, Cagetti MG. Genetic and developmental disorders of the oral mucosa: Epidemiology; molecular mechanisms; diagnostic criteria; management. Periodontol 2000 2019; 80:12-27. [PMID: 31090139 DOI: 10.1111/prd.12261] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A large number of disorders may affect the oral cavity, including genetic diseases, infections, cancers, blood diseases, skin diseases, endocrine and metabolic disorders, autoimmune and rheumatologic diseases, local lesions, to name a few. Oral mucosa shows a considerable variation in its normal structure and a wide range of conditions may affect it. Such conditions are often harmless or minor and could be primary or secondary to systemic disease. Several of them are quite rare and, hence, the diagnosis is not easy. Clinically, lesions may appear as ulcers, discoloration of the oral mucosa and alterations in size and configuration of oral anatomy. Genetic disorders have specific manifestations and can be caused by a derangement of one or more components of the tissue. Many of them follow the skin or systemic signs of the underlying genetic disease, but in a few cases oral signs could be the first manifestation of the disorder. Among them genodermatoses are prominent. They are inherited disorders characterized by a multisystem involvement. This review describes chondro-ectodermal dysplasia, dyskeratosis congenita, Ehlers-Danlos syndrome, hereditary benign intraepithelial dyskeratosis, keratosis follicularis, lipoid proteinosis, multiple hamartoma syndrome, pachyonychia congenita, Peutz-Jeghers syndrome, tuberous sclerosis and white sponge nevus. Other genetic disorders not included in the genodermatosis group and reported in the present review are: acanthosis nigricans, angio-osteo-hypertrophic syndrome, encephalotrigeminal angiomatosis, familial adenomatous polyposis, focal dermal hypoplasia, focal palmoplantar and oral mucosa hyperkeratosis syndrome, gingival fibromatosis, Maffucci's syndrome, neurofibromatosis (type 1) and oro-facial-digital syndrome (type 1). Disorders during embryonic development might lead to a wide range of abnormalities in the oral cavity; some of them are quite common but of negligible concern, whereas others are rare but serious, affecting not only the oral mucosa, but also other structures of the oral cavity (ie palate, tongue and gingiva). Fordyce's granules, leukoedema, cysts of the oral mucosa in newborns, retrocuspid papilla, geographic tongue, fissured tongue, median rhomboid glossitis, hairy tongue, lingual varices and lingual thyroid nodule are described. This review may help dentists, dental hygienists, but also general internists and pediatricians to diagnose different disorders of the oral mucosa, to understand the pathogenesis and to schedule a treatment plan.
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Affiliation(s)
- Roberto Pinna
- Department of Surgery, Medicine and Experimental Sciences, University of Sassari, Sassari, Italy
| | - Fabio Cocco
- Department of Surgery, Medicine and Experimental Sciences, University of Sassari, Sassari, Italy.,WHO Collaboration Centre for Epidemiology and Community Dentistry, University of Milan, Milan, Italy
| | - Guglielmo Campus
- Department of Surgery, Medicine and Experimental Sciences, University of Sassari, Sassari, Italy.,WHO Collaboration Centre for Epidemiology and Community Dentistry, University of Milan, Milan, Italy.,Klinik für Zahnerhaltung, Präventiv-und Kinderzahnmedizin Zahnmedizinische Kliniken (ZMK), University of Bern, Switzerland
| | - Giulio Conti
- IRCCS "Ca Granda-Ospedale Maggiore", University of Milan, Milan, Italy
| | - Egle Milia
- Department of Surgery, Medicine and Experimental Sciences, University of Sassari, Sassari, Italy
| | - Andrea Sardella
- IRCCS "Ca Granda-Ospedale Maggiore", University of Milan, Milan, Italy.,Department of Biomedical, Surgical and Dental Science, University of Milan, Milan, Italy
| | - Maria Grazia Cagetti
- WHO Collaboration Centre for Epidemiology and Community Dentistry, University of Milan, Milan, Italy.,Department of Biomedical, Surgical and Dental Science, University of Milan, Milan, Italy
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34
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Abstract
Cajal bodies (CBs) are nuclear organelles concentrating two kinds of RNA–protein complexes (RNPs), spliceosomal small nuclear (sn), and small CB-specific (sca)RNPs. Whereas the CB marker protein coilin is responsible for retaining snRNPs, the tether for scaRNPs is not known. Here we show that Nopp140, an intrinsically disordered CB phosphoprotein, is required to recruit and retain all scaRNPs in CBs. Knockdown (KD) of Nopp140 releases all scaRNPs leading to an unprecedented reduction in size of CB granules, hallmarks of CB ultrastructure. The CB-localizing protein WDR79 (aka TCAB1), which is mutated in the inherited bone marrow failure syndrome dyskeratosis congenita, is a specific component of all scaRNPs, including telomerase. Whereas mislocalization of telomerase by mutation of WDR79 leads to critically shortened telomeres, mislocalization of telomerase by Nopp140 KD leads to gradual extension of telomeres. Our studies suggest that the dynamic distribution of telomerase between CBs and nucleoplasm uniquely impacts telomere length maintenance and identify Nopp140 as a novel player in telomere biology.
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Affiliation(s)
- Jonathan Bizarro
- Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Amit Bhardwaj
- Department of Pathology, Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY 10016
| | - Susan Smith
- Department of Pathology, Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY 10016
| | - U Thomas Meier
- Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, NY 10461
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35
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Mohanty P, Jadhav P, Shanmukhaiah C, Kumar S, Vundinti BR. A novel DKC1 gene mutation c.1177 A>T (p.I393F) in a case of dyskeratosis congenita with severe telomere shortening. Int J Dermatol 2019; 58:1468-1471. [PMID: 30868555 DOI: 10.1111/ijd.14424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 11/19/2018] [Accepted: 02/14/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Purvi Mohanty
- Department of Cytogenetics, National Institute of Immunohaematology, Mumbai, India
| | - Prajakta Jadhav
- Department of Cytogenetics, National Institute of Immunohaematology, Mumbai, India
| | | | - Selvaa Kumar
- School of Biotechnology and Bioinformatics, D. Y. Patil University, Navi Mumbai, Maharashtra, India
| | - Babu Rao Vundinti
- Department of Cytogenetics, National Institute of Immunohaematology, Mumbai, India
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Shukla S, Bjerke GA, Muhlrad D, Yi R, Parker R. The RNase PARN Controls the Levels of Specific miRNAs that Contribute to p53 Regulation. Mol Cell 2019; 73:1204-1216.e4. [PMID: 30770239 DOI: 10.1016/j.molcel.2019.01.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 11/08/2018] [Accepted: 01/07/2019] [Indexed: 12/14/2022]
Abstract
PARN loss-of-function mutations cause a severe form of the hereditary disease dyskeratosis congenita (DC). PARN deficiency affects the stability of non-coding RNAs such as human telomerase RNA (hTR), but these effects do not explain the severe disease in patients. We demonstrate that PARN deficiency affects the levels of numerous miRNAs in human cells. PARN regulates miRNA levels by stabilizing either mature or precursor miRNAs by removing oligo(A) tails added by the poly(A) polymerase PAPD5, which if remaining recruit the exonuclease DIS3L or DIS3L2 to degrade the miRNA. PARN knockdown destabilizes multiple miRNAs that repress p53 translation, which leads to an increase in p53 accumulation in a Dicer-dependent manner, thus explaining why PARN-defective patients show p53 accumulation. This work also reveals that DIS3L and DIS3L2 are critical 3' to 5' exonucleases that regulate miRNA stability, with the addition and removal of 3' end extensions controlling miRNA levels in the cell.
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Affiliation(s)
- Siddharth Shukla
- Department of Biochemistry, University of Colorado, Boulder, CO 80303, USA
| | - Glen A Bjerke
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80303, USA
| | - Denise Muhlrad
- Department of Biochemistry, University of Colorado, Boulder, CO 80303, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
| | - Rui Yi
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80303, USA
| | - Roy Parker
- Department of Biochemistry, University of Colorado, Boulder, CO 80303, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA.
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Sondalle SB, Longerich S, Ogawa LM, Sung P, Baserga SJ. Fanconi anemia protein FANCI functions in ribosome biogenesis. Proc Natl Acad Sci U S A 2019; 116:2561-70. [PMID: 30692263 DOI: 10.1073/pnas.1811557116] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Fanconi anemia (FA) is a disease of DNA repair characterized by bone marrow failure and a reduced ability to remove DNA interstrand cross-links. Here, we provide evidence that the FA protein FANCI also functions in ribosome biogenesis, the process of making ribosomes that initiates in the nucleolus. We show that FANCI localizes to the nucleolus and is functionally and physically tied to the transcription of pre-ribosomal RNA (pre-rRNA) and to large ribosomal subunit (LSU) pre-rRNA processing independent of FANCD2. While FANCI is known to be monoubiquitinated when activated for DNA repair, we find that it is predominantly in the deubiquitinated state in the nucleolus, requiring the nucleoplasmic deubiquitinase (DUB) USP1 and the nucleolar DUB USP36. Our model suggests a possible dual pathophysiology for FA that includes defects in DNA repair and in ribosome biogenesis.
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Li F, Li W, Qiao X, Xie X. Clinical features of dyskeratosis congenita in mainland China: case reports and literature review. Int J Hematol 2019; 109:328-35. [DOI: 10.1007/s12185-018-02582-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/19/2018] [Accepted: 12/26/2018] [Indexed: 10/27/2022]
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Abstract
Telomere length maintenance is important for genome stability and cell division. In most
eukaryotes, telomeres are maintained by the telomerase ribonucleoprotein (RNP) complex, minimally
composed of the Telomerase Reverse Transcriptase (TERT) and the telomerase RNA (TER) components.
In addition to TERT and TER, other protein subunits are part of the complex and are involved in
telomerase regulation, assembly, disassembly, and degradation. Among them are some molecular
chaperones such as Hsp90 and its co-chaperone p23 which are found associated with the telomerase
RNP complex in humans, yeast and probably in protozoa. Hsp90 and p23 are necessary for the telomerase
RNP assembly and enzyme activity. In budding yeast, the Hsp90 homolog (Hsp82) is also responsible
for the association and dissociation of telomerase from the telomeric DNA by its direct interaction
with a telomere end-binding protein (Cdc13), responsible for regulating telomerase access to telomeres.
In addition, AAA+ ATPases, such as Pontin and Reptin, which are also considered chaperone-
like proteins, associate with the human telomerase complex by the direct interaction of Pontin with
TERT and dyskerin. They are probably responsible for telomerase RNP assembly since their depletion
impairs the accumulation of the complex. Moreover, various RNA chaperones, are also pivotal in the
assembly and migration of the mature telomerase complex and complex intermediates. In this review,
we will focus on the importance of molecular chaperones for telomerase RNP biogenesis and how they
impact telomere length maintenance and cellular homeostasis.
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Affiliation(s)
- Maria Alejandra Viviescas
- Genetics Department, Biosciences Institute, Sao Paulo State University (UNESP), Botucatu, SP, Brazil
| | | | - Marcela Segatto
- Genetics Department, Biosciences Institute, Sao Paulo State University (UNESP), Botucatu, SP, Brazil
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Lebeer M, Wuyts WA, Cassiman D, Laleman W, Nevens F, Pirenne J, Monbaliu D, Roskams T, Verbeken EK, Neyrinck AP, Van Raemdonck DE, Verleden GM, Vos R. Multiple Solid Organ Transplantation in Telomeropathy: Case Series and Literature Review. Transplantation 2018; 102:1747-55. [DOI: 10.1097/tp.0000000000002198] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Sawangarun W, Mandasari M, Aida J, Morita KI, Kayamori K, Ikeda T, Sakamoto K. Loss of Notch1 predisposes oro-esophageal epithelium to tumorigenesis. Exp Cell Res 2018; 372:129-40. [PMID: 30266659 DOI: 10.1016/j.yexcr.2018.09.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 09/11/2018] [Accepted: 09/24/2018] [Indexed: 12/29/2022]
Abstract
Notch signaling functions in diverse developmental and homeostatic processes, including stem cell self-renewal and cell fate determination. Notch1-inactivating mutations are frequently detected in skin and oro-esophageal cancers, suggesting a role for Notch1 as a tumor suppressor. Here, we clarify the contribution of Notch1 deficiency to oro-esophageal tumorigenesis using a physiological experimental model. Tongue and esophageal tumors induced in mice by 4-nitroquinoline-1-oxide (4-NQO) showed pathophysiological similarities to human tumors, including decreased Notch1 expression in the basal cells. We created mutant mice (N1cKO), in which the Notch1 gene was disrupted specifically in the squamous epithelium. The epithelium formed normally in N1cKO mice, and although multiple skin tumors were detected at 65 weeks, no tumors developed in the tongue and esophagus. However, 4-NQO-induced tumorigenesis assays revealed that tumor onset occurred earlier in N1cKO mice than in wild-type littermates, and the tumors arose preferentially from the Notch1-negative epithelium, indicating the tumor susceptibility of Notch1-deficient epithelium. Notch1 regulates the expression of TERT, and age-related telomere erosion was more rapid in Notch1-deficient basal cells. Our results indicated that although Notch1 deficiency had little effect on squamous epithelium formation, it predisposed the affected epithelium to tumor development, at least in part through accelerated telomere erosion.
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Fioredda F, Iacobelli S, Korthof ET, Knol C, van Biezen A, Bresters D, Veys P, Yoshimi A, Fagioli F, Mats B, Zecca M, Faraci M, Miano M, Arcuri L, Maschan M, O'Brien T, Diaz MA, Sevilla J, Smith O, Peffault de Latour R, de la Fuente J, Or R, Van Lint MT, Tolar J, Aljurf M, Fisher A, Skorobogatova EV, Diaz de Heredia C, Risitano A, Dalle JH, Sedláček P, Ghavamzadeh A, Dufour C. Outcome of haematopoietic stem cell transplantation in dyskeratosis congenita. Br J Haematol 2018; 183:110-118. [DOI: 10.1111/bjh.15495] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 04/12/2018] [Accepted: 04/18/2018] [Indexed: 12/12/2022]
Affiliation(s)
| | | | - Elisabeth T. Korthof
- Paediatric Stem Cell Transplantation; Leiden University Medical Centre; Leiden The Netherlands
| | | | | | - Dorine Bresters
- Department of Haematology; Leiden University Hospital; Leiden The Netherlands
| | - Paul Veys
- Bone Marrow Transplantation Department; Great Ormond Street Hospital; London United Kingdom
| | - Ayami Yoshimi
- Department of Paediatrics and Adolescent Medicine; Division of Paediatric Haematology and Oncology; Medical Centre; Faculty of Medicine; University of Freiburg; Freiburg Germany
| | - Franca Fagioli
- Paediatric Onco-Haematology; Stem Cell Transplantation and Cellular Therapy Division; Regina Margherita Children's Hospital; Torino Italy
| | - Brune Mats
- Haematology Unit; Sahlgrenska University; Göteborg Sweden
| | - Marco Zecca
- Paediatric Haematology/Oncology; Fondazione IRCCS Policlinico San Matteo; Pavia Italy
| | - Maura Faraci
- Bone Marrow Transplantation Unit; Istituto Giannina Gaslini; Genoa Italy
| | - Maurizio Miano
- Haematology Unit; Istituto Giannina Gaslini; Genoa Italy
| | - Luca Arcuri
- Haematology Unit; Istituto Giannina Gaslini; Genoa Italy
| | - Michael Maschan
- Federal Research Centre of Paediatric Haematology, Oncology and Immunology; Moscow Russia
| | - Tracey O'Brien
- Kids Cancer Centre; Sydney Children's Hospital; Sydney Australia
| | - Miguel A. Diaz
- Department of Haematology/Oncology; Hospital Infantil Universitario Nino Jesus; Madrid Spain
| | - Julian Sevilla
- Stem Cell Transplant Unit; Hospital Niño Jesús; Madrid Spain
| | - Owen Smith
- Department of Paediatric Haematology; Our Lady's Children's Hospital; Dublin Ireland
| | | | | | - Reuven Or
- Director Department of Bone Marrow Transplantation and Cancer Immunotherapy; Hadassah University Hospital; Jerusalem Israel
| | | | - Jakub Tolar
- Pediatrics Department, Hematology and Bone Marrow Transplantation; University of Minnesota; Minneapolis MN USA
| | - Mahmoud Aljurf
- Department of Haematology, Oncology and Stem Cell Therapy; King Faisal's Hospital; Riyadh Saudi Arabia
| | - Alain Fisher
- Department of Immunology; Necker's Hospital; Paris France
| | | | | | - Antonio Risitano
- Department of Biochemistry and Medical Biotechnologies; Federico II University; Naples Italy
| | - Jean-Hugues Dalle
- Haemato-Immunology Department; Robert Debre Hospital, and Paris-Diderot University; Paris France
| | - Petr Sedláček
- Department of Paediatric Haematology and Oncology; Charles University; Prague Czech Republic
| | - Ardeshir Ghavamzadeh
- Haematology-Oncology and Stem Cell Transplantation Research Centre; Shariati Hospital; Teheran Iran
| | - Carlo Dufour
- Haematology Unit; Istituto Giannina Gaslini; Genoa Italy
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Deng Y, Li Z, Liu J, Wang Z, Cao Y, Mou Y, Fu B, Mo B, Wei J, Cheng Z, Luo L, Li J, Shu Y, Wang X, Luo G, Yang S, Wang Y, Zhu J, Yang J, Wu M, Xu X, Ge R, Chen X, Peng Q, Wei G, Li Y, Yang H, Fang S, Zhang X, Xiong W. Targeted resequencing reveals genetic risks in patients with sporadic idiopathic pulmonary fibrosis. Hum Mutat 2018; 39:1238-1245. [PMID: 29920840 DOI: 10.1002/humu.23566] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 06/11/2018] [Accepted: 06/11/2018] [Indexed: 12/19/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a genetic heterogeneous disease with high mortality and poor prognosis. However, a large fraction of genetic cause remains unexplained, especially in sporadic IPF (∼80% IPF). By systemically reviewing related literature and potential pathogenic pathways, 92 potentially IPF-related genes were selected and sequenced in genomic DNAs from 253 sporadic IPF patients and 125 matched health controls using targeted massively parallel next-generation sequencing. The identified risk variants were confirmed by Sanger sequencing. We identified two pathogenic and 10 loss-of-function (LOF) candidate variants, accounting for 4.74% (12 out of 253) of all the IPF cases. In burden tests, rare missense variants in three genes (CSF3R, DSP, and LAMA3) were identified that have a statistically significant relationship with IPF. Four common SNPs (rs3737002, rs2296160, rs1800470, and rs35705950) were observed to be statistically associated with increased risk of IPF. In the cumulative risk model, high risk subjects had 3.47-fold (95%CI: 2.07-5.81, P = 2.34 × 10-6 ) risk of developing IPF compared with low risk subjects. We drafted a comprehensive map of genetic risks (including both rare and common candidate variants) in patients with IPF, which could provide insights to help in understanding mechanisms, providing genetic diagnosis, and predicting risk for IPF.
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Affiliation(s)
- Yanhan Deng
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, Key Cite of National Clinical Research Center for Respiratory Disease, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
| | - Zongzhe Li
- Division of Cardiology, Departments of Internal Medicine and Genetic Diagnosis Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Juan Liu
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, Key Cite of National Clinical Research Center for Respiratory Disease, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
| | - Zheng Wang
- Department of Respiratory Medicine, Henan Provincial People's Hospital & the People's Hospital of Zhengzhou University, Zhengzhou, China
| | - Yanyan Cao
- Division of Cardiology, Departments of Internal Medicine and Genetic Diagnosis Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yong Mou
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, Key Cite of National Clinical Research Center for Respiratory Disease, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
| | - Bohua Fu
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, Key Cite of National Clinical Research Center for Respiratory Disease, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
| | - Biwen Mo
- Department of Respiratory Medicine, Affiliated hospital of Guilin Medical University, Guilin, China
| | - Jianghong Wei
- Department of Respiratory Medicine, Affiliated hospital of Guilin Medical University, Guilin, China
| | - Zhenshun Cheng
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Liman Luo
- Department of Pediatrics, The 306 Hospital of People's Liberation Army, Beijing, China
| | - Jingping Li
- Department of Respiratory Medicine, Qianjiang Central Hospital, Qianjiang, China
| | - Ying Shu
- Department of Respiratory Medicine, Qianjiang Central Hospital, Qianjiang, China
| | - Xiaomei Wang
- Department of Geriatrics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Guangwei Luo
- Department of Respiratory Medicine, Wuhan No. 1 Hospital, Wuhan, China
| | - Shuo Yang
- Department of Respiratory Medicine, Wuhan No. 1 Hospital, Wuhan, China
| | - Yingnan Wang
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Three Gorges University, Yichang, China
| | - Jing Zhu
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Three Gorges University, Yichang, China
| | - Jingping Yang
- Department of Respiratory and Critical Care Medicine, The Third Affiliated Hospital of Inner Mongolia Medical University, Baotou, China
| | - Ming Wu
- Department of Respiratory and Critical Care Medicine, The Third Affiliated Hospital of Inner Mongolia Medical University, Baotou, China
| | - Xuyan Xu
- Department of Respiratory Medicine, Xianning Center Hospital, The First Affiliated Hospital of Hubei University of Science and Technology, Xianning, China
| | - Renying Ge
- Department of Respiratory Medicine, Xianning Center Hospital, The First Affiliated Hospital of Hubei University of Science and Technology, Xianning, China
| | - Xueqin Chen
- Department of Respiratory and Critical Care Medicine, Wuhan University Renmin Hospital, Wuhan University, Wuhan, China
| | - Qingzhen Peng
- Department of Respiratory Medicine, Xiaogan Central Hospital, Xiaogan, China
| | - Guang Wei
- Department of Respiratory Medicine, Xiaogan Central Hospital, Xiaogan, China
| | - Yaqing Li
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, Hangzhou, China
| | - Hua Yang
- Department of Respiratory Medicine, University Hospital of Hubei University for Nationalities, Enshi, China
| | - Shirong Fang
- Department of Respiratory Medicine, University Hospital of Hubei University for Nationalities, Enshi, China
| | - Xiaoju Zhang
- Department of Respiratory Medicine, Henan Provincial People's Hospital & the People's Hospital of Zhengzhou University, Zhengzhou, China
| | - Weining Xiong
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, Key Cite of National Clinical Research Center for Respiratory Disease, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
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Hosokawa K, Arai F. The role of telomere binding molecules for normal and abnormal hematopoiesis. Int J Hematol 2018; 107:646-55. [DOI: 10.1007/s12185-018-2432-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 03/12/2018] [Indexed: 11/26/2022]
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Angrisani A, Matrone N, Belli V, Vicidomini R, Di Maio N, Turano M, Scialò F, Netti PA, Porcellini A, Furia M. A functional connection between dyskerin and energy metabolism. Redox Biol 2017; 14:557-565. [PMID: 29132127 PMCID: PMC5684492 DOI: 10.1016/j.redox.2017.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/12/2017] [Accepted: 11/03/2017] [Indexed: 02/06/2023] Open
Abstract
The human DKC1 gene encodes dyskerin, an evolutionarily conserved nuclear protein whose overexpression represents a common trait of many types of aggressive sporadic cancers. As a crucial component of the nuclear H/ACA snoRNP complexes, dyskerin is involved in a variety of essential processes, including telomere maintenance, splicing efficiency, ribosome biogenesis, snoRNAs stabilization and stress response. Although multiple minor dyskerin splicing isoforms have been identified, their functions remain to be defined. Considering that low-abundance splice variants could contribute to the wide functional repertoire attributed to dyskerin, possibly having more specialized tasks or playing significant roles in changing cell status, we investigated in more detail the biological roles of a truncated dyskerin isoform that lacks the C-terminal nuclear localization signal and shows a prevalent cytoplasmic localization. Here we show that this dyskerin variant can boost energy metabolism and improve respiration, ultimately conferring a ROS adaptive response and a growth advantage to cells. These results reveal an unexpected involvement of DKC1 in energy metabolism, highlighting a previously underscored role in the regulation of metabolic cell homeostasis. Human dyskerin is an evolutionary conserved component of nuclear H/ACA snoRNPs. The functional role of a truncated dyskerin isoform (Iso3) is analyzed. Iso3 overexpression boosts energy metabolism and induces a ROS adaptive response. Iso3 connects dyskerin with mitochondrial functionality and redox homeostasis.
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Affiliation(s)
- Alberto Angrisani
- Department of Biology, University of Naples "Federico II", Complesso Universitario Monte Santangelo, via Cinthia, 80126 Napoli, Italy.
| | - Nunzia Matrone
- Department of Biology, University of Naples "Federico II", Complesso Universitario Monte Santangelo, via Cinthia, 80126 Napoli, Italy
| | - Valentina Belli
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci 53, 80125 Napoli, Italy
| | - Rosario Vicidomini
- Department of Biology, University of Naples "Federico II", Complesso Universitario Monte Santangelo, via Cinthia, 80126 Napoli, Italy
| | - Nunzia Di Maio
- Department of Biology, University of Naples "Federico II", Complesso Universitario Monte Santangelo, via Cinthia, 80126 Napoli, Italy
| | - Mimmo Turano
- Department of Biology, University of Naples "Federico II", Complesso Universitario Monte Santangelo, via Cinthia, 80126 Napoli, Italy
| | - Filippo Scialò
- Institute for Cell and Molecular Biosciences, Campus for Ageing and Vitality, University of Newcastle, Newcastle-upon-Tyne NE4 5PL, United Kingdom
| | - Paolo Antonio Netti
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci 53, 80125 Napoli, Italy; Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy
| | - Antonio Porcellini
- Department of Biology, University of Naples "Federico II", Complesso Universitario Monte Santangelo, via Cinthia, 80126 Napoli, Italy
| | - Maria Furia
- Department of Biology, University of Naples "Federico II", Complesso Universitario Monte Santangelo, via Cinthia, 80126 Napoli, Italy; Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy.
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Abstract
PURPOSE OF REVIEW Dyskeratosis congenita is an inherited bone marrow failure syndrome caused by defects in telomere maintenance. Hematopoietic stem cell transplantation (HSCT) is the only curative treatment for bone marrow failure because of dyskeratosis congenita. The present review summarizes the literature with respect to the diagnosis and treatment of patients with dyskeratosis congenita who received HSCT, and discusses the recent progress in the management of dyskeratosis congenita. RECENT FINDINGS The recent systematic review of the literature showed poor long-term outcome, with 10-year survival estimates of only 23% in 109 patients with dyskeratosis congenita who received HSCT. Multivariate analysis identified age greater than 20 years at HSCT, HSCT before 2000, and alternative donor source to be poor prognostic markers. HSCT for dyskeratosis congenita is characterized by a marked decline in long-term survival because of late deaths from pulmonary complications. However, a prospective study using danazol showed promising results in gain in telomere length and hematologic responses. SUMMARY A recent prospective study may support the recommendation that HSCT is not indicated for patients with dyskeratosis congenita; instead, they should receive androgen, particularly danazol, as a first-line therapy. Another option may be routine use of androgen after HSCT for the prophylaxis of pulmonary fibrosis.
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Shukla S, Parker R. PARN Modulates Y RNA Stability and Its 3'-End Formation. Mol Cell Biol 2017; 37:e00264-17. [PMID: 28760775 DOI: 10.1128/MCB.00264-17] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 07/24/2017] [Indexed: 11/20/2022] Open
Abstract
Loss-of-function mutations in 3'-to-5' exoribonucleases have been implicated in hereditary human diseases. For example, PARN mutations cause a severe form of dyskeratosis congenita (DC), wherein PARN deficiency leads to human telomerase RNA instability. Since the DC phenotype in PARN patients is even more severe than that of loss-of-function alleles in telomerase components, we hypothesized that PARN would also be required for the stability of other RNAs. Here, we show that PARN depletion reduces the levels of abundant human Y RNAs, which might contribute to the severe phenotype of DC observed in patients. Depletion of PAPD5 or the cytoplasmic exonuclease DIS3L rescues the effect of PARN depletion on Y RNA levels, suggesting that PARN stabilizes Y RNAs by removing oligoadenylated tails added by PAPD5, which would otherwise recruit DIS3L for Y RNA degradation. Through deep sequencing of 3' ends, we provide evidence that PARN can also deadenylate the U6 and RMRP RNAs without affecting their levels. Moreover, we observed widespread posttranscriptional oligoadenylation, uridylation, and guanylation of U6 and Y RNA 3' ends, suggesting that in mammalian cells, the formation of a 3' end for noncoding RNAs can be a complex process governed by the activities of various 3'-end polymerases and exonucleases.
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48
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Dos Santos PC, Panero J, Stanganelli C, Palau Nagore V, Stella F, Bezares R, Slavutsky I. Dysregulation of H/ACA ribonucleoprotein components in chronic lymphocytic leukemia. PLoS One 2017; 12:e0179883. [PMID: 28666010 PMCID: PMC5493334 DOI: 10.1371/journal.pone.0179883] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 06/06/2017] [Indexed: 11/18/2022] Open
Abstract
Telomeres are protective repeats of TTAGGG sequences located at the end of human chromosomes. They are essential to maintain chromosomal integrity and genome stability. Telomerase is a ribonucleoprotein complex containing an internal RNA template (hTR) and a catalytic subunit (hTERT). The human hTR gene consists of three major domains; among them the H/ACA domain is essential for telomere biogenesis. H/ACA ribonucleoprotein (RNP) complex is composed of four evolutionary conserved proteins, including dyskerin (encoded by DKC1 gene), NOP10, NHP2 and GAR1. In this study, we have evaluated the expression profile of the H/ACA RNP complex genes: DKC1, NOP10, NHP2 and GAR1, as well as hTERT and hTR mRNA levels, in patients with chronic lymphocytic leukemia (CLL). Results were correlated with the number and type of genetic alteration detected by conventional cytogenetics and FISH (fluorescence in situ hybridization), IGHV (immunoglobulin heavy chain variable region) mutational status, telomere length (TL) and clinico-pathological characteristics of patients. Our results showed significant decreased expression of GAR1, NOP10, DKC1 and hTR, as well as increased mRNA levels of hTERT in patients compared to controls (p≤0.04). A positive correlation between the expression of GAR1-NHP2, GAR1-NOP10, and NOP10-NHP2 (p<0.0001), were observed. The analysis taking into account prognostic factors showed a significant increased expression of hTERT gene in unmutated-IGHV cases compared to mutated-CLL patients (p = 0.0185). The comparisons among FISH groups exhibited increased expression of DKC1 in cases with two or more alterations with respect to no abnormalities, trisomy 12 and del13q14, and of NHP2 and NOP10 compared to those with del13q14 (p = 0.03). The analysis according to TL showed a significant increased expression of hTERT (p = 0.0074) and DKC1 (p = 0.0036) in patients with short telomeres compared to those with long TL. No association between gene expression and clinical parameters was found. Our results suggest a role for these telomere associated genes in genomic instability and telomere dysfunction in CLL.
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Affiliation(s)
- Patricia Carolina Dos Santos
- Laboratorio de Genética de Neoplasias Linfoides, Instituto de Medicina Experimental, CONICET-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Julieta Panero
- Laboratorio de Genética de Neoplasias Linfoides, Instituto de Medicina Experimental, CONICET-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Carmen Stanganelli
- División Patología Molecular, Instituto de Investigaciones Hematológicas-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Virginia Palau Nagore
- Laboratorio de Genética de Neoplasias Linfoides, Instituto de Medicina Experimental, CONICET-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Flavia Stella
- Laboratorio de Genética de Neoplasias Linfoides, Instituto de Medicina Experimental, CONICET-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Raimundo Bezares
- Servicio de Hematología, Hospital Teodoro Álvarez, Buenos Aires, Argentina
| | - Irma Slavutsky
- Laboratorio de Genética de Neoplasias Linfoides, Instituto de Medicina Experimental, CONICET-Academia Nacional de Medicina, Buenos Aires, Argentina
- * E-mail:
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49
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Abstract
Chromosome ends are complex structures, which require a panel of factors for their elongation, replication, and protection. We describe here the mechanics of mammalian telomeres, dynamics and maintainance in relation to lamins. Multiple biochemical connections, including association of telomeres to the nuclear envelope and matrix, of telomeric proteins to lamins, and of lamin-associated proteins to chromosome ends, underline the interplay between lamins and telomeres. Paths toward senescence, such as defective telomere replication, altered heterochromatin organization, and impaired DNA repair, are common to lamins' and telomeres' dysfunction. The convergence of phenotypes can be interpreted through a model of dynamic, lamin-controlled functional platforms dedicated to the function of telomeres as fragile sites. The features of telomeropathies and laminopathies, and of animal models underline further overlapping aspects, including the alteration of stem cell compartments. We expect that future studies of basic biology and on aging will benefit from the analysis of this telomere-lamina interplay.
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Affiliation(s)
- Romina Burla
- a Dipartimento di Biologia e Biotecnologie "C. Darwin," Sapienza Università di Roma , Rome, Italy.,b Istituto di Biologia e Patologia Molecolari del CNR , Rome , Italy
| | - Mattia La Torre
- a Dipartimento di Biologia e Biotecnologie "C. Darwin," Sapienza Università di Roma , Rome, Italy
| | - Isabella Saggio
- a Dipartimento di Biologia e Biotecnologie "C. Darwin," Sapienza Università di Roma , Rome, Italy.,b Istituto di Biologia e Patologia Molecolari del CNR , Rome , Italy.,c Istituto Pasteur Fondazione Cenci Bolognetti , Rome , Italy
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50
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Olombrada M, Lázaro-Gorines R, López-Rodríguez JC, Martínez-Del-Pozo Á, Oñaderra M, Maestro-López M, Lacadena J, Gavilanes JG, García-Ortega L. Fungal Ribotoxins: A Review of Potential Biotechnological Applications. Toxins (Basel) 2017; 9:E71. [PMID: 28230789 DOI: 10.3390/toxins9020071] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 02/14/2017] [Accepted: 02/16/2017] [Indexed: 12/20/2022] Open
Abstract
Fungi establish a complex network of biological interactions with other organisms in nature. In many cases, these involve the production of toxins for survival or colonization purposes. Among these toxins, ribotoxins stand out as promising candidates for their use in biotechnological applications. They constitute a group of highly specific extracellular ribonucleases that target a universally conserved sequence of RNA in the ribosome, the sarcin-ricin loop. The detailed molecular study of this family of toxic proteins over the past decades has highlighted their potential in applied research. Remarkable examples would be the recent studies in the field of cancer research with promising results involving ribotoxin-based immunotoxins. On the other hand, some ribotoxin-producer fungi have already been studied in the control of insect pests. The recent role of ribotoxins as insecticides could allow their employment in formulas and even as baculovirus-based biopesticides. Moreover, considering the important role of their target in the ribosome, they can be used as tools to study how ribosome biogenesis is regulated and, eventually, may contribute to a better understanding of some ribosomopathies.
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