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del Rey M, Benito R, Fontanillo C, Campos-Laborie FJ, Janusz K, Velasco-Hernández T, Abáigar M, Hernández M, Cuello R, Borrego D, Martín-Zanca D, De Las Rivas J, Mills KI, Hernández-Rivas JM. Deregulation of genes related to iron and mitochondrial metabolism in refractory anemia with ring sideroblasts. PLoS One 2015; 10:e0126555. [PMID: 25955609 PMCID: PMC4425562 DOI: 10.1371/journal.pone.0126555] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 04/03/2015] [Indexed: 12/02/2022] Open
Abstract
The presence of SF3B1 gene mutations is a hallmark of refractory anemia with ring sideroblasts (RARS). However, the mechanisms responsible for iron accumulation that characterize the Myelodysplastic Syndrome with ring sideroblasts (MDS-RS) are not completely understood. In order to gain insight in the molecular basis of MDS-RS, an integrative study of the expression and mutational status of genes related to iron and mitochondrial metabolism was carried out. A total of 231 low-risk MDS patients and 81 controls were studied. Gene expression analysis revealed that iron metabolism and mitochondrial function had the highest number of genes deregulated in RARS patients compared to controls and the refractory cytopenias with unilineage dysplasia (RCUD). Thus mitochondrial transporters SLC25 (SLC25A37 and SLC25A38) and ALAD genes were over-expressed in RARS. Moreover, significant differences were observed between patients with SF3B1 mutations and patients without the mutations. The deregulation of genes involved in iron and mitochondrial metabolism provides new insights in our knowledge of MDS-RS. New variants that could be involved in the pathogenesis of these diseases have been identified.
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Affiliation(s)
- Mónica del Rey
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
| | - Rocío Benito
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
| | - Celia Fontanillo
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
| | - Francisco J. Campos-Laborie
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
| | - Kamila Janusz
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
| | | | - María Abáigar
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
| | - María Hernández
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
| | - Rebeca Cuello
- Servicio de Hematología, Hospital Clínico de Valladolid, Valladolid, Spain
| | - Daniel Borrego
- Servicio de Hematología, Hospital Clínico de Valladolid, Valladolid, Spain
| | - Dionisio Martín-Zanca
- Instituto de Biología Funcional y Genómica, CSIC-Universidad de Salamanca, Salamanca, Spain
| | - Javier De Las Rivas
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
| | - Ken I. Mills
- Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, United Kingdom
| | - Jesús M. Hernández-Rivas
- IBMCC, Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Salamanca, Spain
- IBSAL, Instituto de Investigación Biomédica de Salamanca, Salamanca, Spain
- Servicio de Hematología, Hospital Universitario de Salamanca, Salamanca, Spain
- * E-mail:
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Martin-Guerrero I, Gutierrez-Camino A, Lopez-Lopez E, Bilbao-Aldaiturriaga N, Pombar-Gomez M, Ardanaz M, Garcia-Orad A. Genetic variants in miRNA processing genes and pre-miRNAs are associated with the risk of chronic lymphocytic leukemia. PLoS One 2015; 10:e0118905. [PMID: 25793711 PMCID: PMC4368096 DOI: 10.1371/journal.pone.0118905] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 01/15/2015] [Indexed: 01/05/2023] Open
Abstract
Genome wide association studies (GWAS) have identified several low-penetrance susceptibility alleles in chronic lymphocytic leukemia (CLL). Nevertheless, these studies scarcely study regions that are implicated in non-coding molecules such as microRNAs (miRNAs). Abnormalities in miRNAs, as altered expression patterns and mutations, have been described in CLL, suggesting their implication in the development of the disease. Genetic variations in miRNAs can affect levels of miRNA expression if present in pre-miRNAs and in miRNA biogenesis genes or alter miRNA function if present in both target mRNA and miRNA sequences. Therefore, the present study aimed to evaluate whether polymorphisms in pre-miRNAs, and/or miRNA processing genes contribute to predisposition for CLL. A total of 91 SNPs in 107 CLL patients and 350 cancer-free controls were successfully analyzed using TaqMan Open Array technology. We found nine statistically significant associations with CLL risk after FDR correction, seven in miRNA processing genes (rs3805500 and rs6877842 in DROSHA, rs1057035 in DICER1, rs17676986 in SND1, rs9611280 in TNRC6B, rs784567 in TRBP and rs11866002 in CNOT1) and two in pre-miRNAs (rs11614913 in miR196a2 and rs2114358 in miR1206). These findings suggest that polymorphisms in genes involved in miRNAs biogenesis pathway as well as in pre-miRNAs contribute to the risk of CLL. Large-scale studies are needed to validate the current findings.
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Affiliation(s)
- Idoia Martin-Guerrero
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Medicine and Odontology, University of the Basque Country, UPV/EHU, Bilbao, Spain
| | - Angela Gutierrez-Camino
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Medicine and Odontology, University of the Basque Country, UPV/EHU, Bilbao, Spain
| | - Elixabet Lopez-Lopez
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Medicine and Odontology, University of the Basque Country, UPV/EHU, Bilbao, Spain
| | - Nerea Bilbao-Aldaiturriaga
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Medicine and Odontology, University of the Basque Country, UPV/EHU, Bilbao, Spain
| | - Maria Pombar-Gomez
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Medicine and Odontology, University of the Basque Country, UPV/EHU, Bilbao, Spain
| | | | - Africa Garcia-Orad
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Medicine and Odontology, University of the Basque Country, UPV/EHU, Bilbao, Spain
- BioCruces Health Research Institute, UPV/EHU, Leioa, Spain
- * E-mail:
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Kavanagh JN, Redmond KM, Schettino G, Prise KM. DNA double strand break repair: a radiation perspective. Antioxid Redox Signal 2013; 18:2458-72. [PMID: 23311752 DOI: 10.1089/ars.2012.5151] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
SIGNIFICANCE Ionizing radiation (IR) can induce a wide range of unique deoxyribonucleic acid (DNA) lesions due to the spatiotemporal correlation of the ionization produced. Of these, DNA double strand breaks (DSBs) play a key role. Complex mechanisms and sophisticated pathways are available within cells to restore the integrity and sequence of the damaged DNA molecules. RECENT ADVANCES Here we review the main aspects of the DNA DSB repair mechanisms with emphasis on the molecular pathways, radiation-induced lesions, and their significance for cellular processes. CRITICAL ISSUES Although the main characteristics and proteins involved in the two DNA DSB repair processes present in eukaryotic cells (homologous recombination and nonhomologous end-joining) are reasonably well established, there are still uncertainties regarding the primary sensing event and their dependency on the complexity, location, and time of the damage. Interactions and overlaps between the different pathways play a critical role in defining the repair efficiency and determining the cellular functional behavior due to unrepaired/miss-repaired DNA lesions. The repair pathways involved in repairing lesions induced by soluble factors released from directly irradiated cells may also differ from the established response mechanisms. FUTURE DIRECTIONS An improved understanding of the molecular pathways involved in sensing and repairing damaged DNA molecules and the role of DSBs is crucial for the development of novel classes of drugs to treat human diseases and to exploit characteristics of IR and alterations in tumor cells for successful radiotherapy applications.
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Affiliation(s)
- Joy N Kavanagh
- Centre for Cancer Research & Cell Biology, Queen's University Belfast, Belfast, United Kingdom
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