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Mutated FANCA Gene Role in the Modulation of Energy Metabolism and Mitochondrial Dynamics in Head and Neck Squamous Cell Carcinoma. Cells 2022; 11:cells11152353. [PMID: 35954197 PMCID: PMC9425438 DOI: 10.3390/cells11152353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/26/2022] [Accepted: 07/29/2022] [Indexed: 11/16/2022] Open
Abstract
Fanconi Anaemia (FA) is a rare recessive genetic disorder characterized by a defective DNA repair mechanism. Although aplastic anaemia is the principal clinical sign in FA, patients develop a head and neck squamous cell carcinoma (HNSCC) with a frequency 500–700 folds higher than the general population, which appears more aggressive, with survival of under two years. Since FA gene mutations are also associated with a defect in the aerobic metabolism and an increased oxidative stress accumulation, this work aims to evaluate the effect of FANCA mutation on the energy metabolism and the relative mitochondrial quality control pathways in an HNSCC cellular model. Energy metabolism and cellular antioxidant capacities were evaluated by oximetric, luminometric, and spectrophotometric assays. The dynamics of the mitochondrial network, the quality of mitophagy and autophagy, and DNA double-strand damage were analysed by Western blot analysis. Data show that the HNSCC cellular model carrying the FANCA gene mutation displays an altered electron transport between respiratory Complexes I and III that does not depend on the OxPhos protein expression. Moreover, FANCA HNSCC cells show an imbalance between fusion and fission processes and alterations in autophagy and mitophagy pathways. Together, all these alterations associated with the FANCA gene mutation cause cellular energy depletion and a metabolic switch to glycolysis, exacerbating the Warburg effect in HNSCC cells and increasing the growth rate. In addition, the altered DNA repair due to the FANCA mutation causes a higher accumulation of DNA damage in the HNSCC cellular model. In conclusion, changes in energy metabolism and mitochondrial dynamics could explain the strict correlation between HNSCC and FA genes, helping to identify new therapeutic targets.
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Pollard JA, Furutani E, Liu S, Esrick E, Cohen LE, Bledsoe J, Liu CW, Lu K, de Haro MJR, Surrallés J, Malsch M, Kuniholm A, Galvin A, Armant M, Kim AS, Ballotti K, Moreau L, Zhou Y, Babushok D, Boulad F, Carroll C, Hartung H, Hont A, Nakano T, Olson T, Sze SG, Thompson AA, Wlodarski MW, Gu X, Libermann TA, D’Andrea A, Grompe M, Weller E, Shimamura A. Metformin for treatment of cytopenias in children and young adults with Fanconi anemia. Blood Adv 2022; 6:3803-3811. [PMID: 35500223 PMCID: PMC9631552 DOI: 10.1182/bloodadvances.2021006490] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 04/15/2022] [Indexed: 11/26/2022] Open
Abstract
Fanconi anemia (FA), a genetic DNA repair disorder characterized by marrow failure and cancer susceptibility. In FA mice, metformin improves blood counts and delays tumor development. We conducted a single institution study of metformin in nondiabetic patients with FA to determine feasibility and tolerability of metformin treatment and to assess for improvement in blood counts. Fourteen of 15 patients with at least 1 cytopenia (hemoglobin < 10 g/dL; platelet count < 100 000 cells/µL; or an absolute neutrophil count < 1000 cells/µL) were eligible to receive metformin for 6 months. Median patient age was 9.4 years (range 6.0-26.5 ). Thirteen of 14 subjects (93%) tolerated maximal dosing for age; 1 subject had dose reduction for grade 2 gastrointestinal symptoms. No subjects developed hypoglycemia or metabolic acidosis. No subjects had dose interruptions caused by toxicity, and no grade 3 or higher adverse events attributed to metformin were observed. Hematologic response based on modified Myelodysplastic Syndrome International Working Group criteria was observed in 4 of 13 evaluable patients (30.8%; 90% confidence interval, 11.3-57.3). Median time to response was 84.5 days (range 71-128 days). Responses were noted in neutrophils (n = 3), platelets (n = 1), and red blood cells (n = 1). No subjects met criteria for disease progression or relapse during treatment. Correlative studies explored potential mechanisms of metformin activity in FA. Plasma proteomics showed reduction in inflammatory pathways with metformin. Metformin is safe and tolerable in nondiabetic patients with FA and may provide therapeutic benefit. This trial was registered at as #NCT03398824.
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Affiliation(s)
- Jessica A. Pollard
- Pediatric Hematology-Oncology, Boston Children’s Hospital, Boston, MA
- Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA
- Department of Pediatrics, Harvard Medical School, Boston, MA
| | - Elissa Furutani
- Pediatric Hematology-Oncology, Boston Children’s Hospital, Boston, MA
- Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA
- Department of Pediatrics, Harvard Medical School, Boston, MA
| | - Shanshan Liu
- Biostatistics and Research Design Center, Institutional Centers for Clinical and Translational Research, Harvard Medical School, Boston, MA
| | - Erica Esrick
- Pediatric Hematology-Oncology, Boston Children’s Hospital, Boston, MA
- Department of Pediatrics, Harvard Medical School, Boston, MA
| | - Laurie E. Cohen
- Department of Pediatrics, Harvard Medical School, Boston, MA
- Department of Endocrinology, and
| | - Jacob Bledsoe
- Department of Pathology, Boston Children’s Hospital, Boston, MA
| | - Chih-Wei Liu
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Kun Lu
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Maria Jose Ramirez de Haro
- Joint Research Unit UAB-Sant Pau Biomedical Research Institute,Institut de Recerca Hospital de la Santa Creu i Sant Pau-IIB Sant Pau, Universitat Autònoma de Barcelona, Barcelona Spain
- Center for Biomedical Network Research on Rare Diseases, Madrid, Spain
| | - Jordi Surrallés
- Joint Research Unit UAB-Sant Pau Biomedical Research Institute,Institut de Recerca Hospital de la Santa Creu i Sant Pau-IIB Sant Pau, Universitat Autònoma de Barcelona, Barcelona Spain
- Center for Biomedical Network Research on Rare Diseases, Madrid, Spain
| | - Maggie Malsch
- Pediatric Hematology-Oncology, Boston Children’s Hospital, Boston, MA
- Clinical Research Operations Center, Institutional Centers for Clinical and Translational Research, Boston Children’s Hospital, Boston, MA
| | - Ashley Kuniholm
- Clinical Research Operations Center, Institutional Centers for Clinical and Translational Research, Boston Children’s Hospital, Boston, MA
| | - Ashley Galvin
- Clinical Research Operations Center, Institutional Centers for Clinical and Translational Research, Boston Children’s Hospital, Boston, MA
| | - Myriam Armant
- Trans Laboratory, Boston Children’s Hospital, Boston, MA
| | - Annette S. Kim
- Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Kaitlyn Ballotti
- Pediatric Hematology-Oncology, Boston Children’s Hospital, Boston, MA
| | - Lisa Moreau
- Comprehensive Center for Fanconi Anemia, Dana-Farber Cancer Institute, Boston, MA
| | - Yu Zhou
- Pediatric Hematology-Oncology, Boston Children’s Hospital, Boston, MA
| | - Daria Babushok
- Division of Hematology-Oncology, University of Pennsylvania, Philadelphia, PA
| | - Farid Boulad
- Pediatric Hematology-Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY
| | - Clint Carroll
- Pediatric Hematology-Oncology, The Children's Hospital at TriStar Centennial, Nashville, TN
| | - Helge Hartung
- Pediatric Hematology-Oncology, Children’s Hospital of Philadelphia, Philadelphia, PA
| | - Amy Hont
- Pediatric Hematology-Oncology, Children’s National Medical Center, Washington, DC
| | - Taizo Nakano
- Pediatric Hematology-Oncology, Children’s Hospital Colorado, Denver, CO
| | - Tim Olson
- Pediatric Hematology-Oncology, Children’s Hospital of Philadelphia, Philadelphia, PA
| | - Sei-Gyung Sze
- Department of Pediatrics, Maine Medical Center, Tufts University School of Medicine, Portland, ME
| | - Alexis A. Thompson
- Pediatric Hematology-Oncology, Ann and Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL
| | - Marcin W. Wlodarski
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN
| | - Xuesong Gu
- Beth Israel Deaconess Medical Center Genomics, Proteomics, Bioinformatics and Systems Biology Center, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - Towia A. Libermann
- Beth Israel Deaconess Medical Center Genomics, Proteomics, Bioinformatics and Systems Biology Center, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - Alan D’Andrea
- Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA
| | - Markus Grompe
- Oregon Stem Cell Center, Department of Pediatrics, Papé Family Institute, Oregon Health and Science University, Portland, OR; and
| | - Edie Weller
- Department of Pediatrics, Harvard Medical School, Boston, MA
- Biostatistics and Research Design Center, Institutional Centers for Clinical and Translational Research, Harvard Medical School, Boston, MA
| | - Akiko Shimamura
- Pediatric Hematology-Oncology, Boston Children’s Hospital, Boston, MA
- Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA
- Department of Pediatrics, Harvard Medical School, Boston, MA
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CDK5RAP3, a New BRCA2 Partner That Regulates DNA Repair, Is Associated with Breast Cancer Survival. Cancers (Basel) 2022; 14:cancers14020353. [PMID: 35053516 PMCID: PMC8773632 DOI: 10.3390/cancers14020353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/27/2021] [Accepted: 10/30/2021] [Indexed: 02/01/2023] Open
Abstract
BRCA2 is essential for homologous recombination DNA repair. BRCA2 mutations lead to genome instability and increased risk of breast and ovarian cancer. Similarly, mutations in BRCA2-interacting proteins are also known to modulate sensitivity to DNA damage agents and are established cancer risk factors. Here we identify the tumor suppressor CDK5RAP3 as a novel BRCA2 helical domain-interacting protein. CDK5RAP3 depletion induced DNA damage resistance, homologous recombination and single-strand annealing upregulation, and reduced spontaneous and DNA damage-induced genomic instability, suggesting that CDK5RAP3 negatively regulates double-strand break repair in the S-phase. Consistent with this cellular phenotype, analysis of transcriptomic data revealed an association between low CDK5RAP3 tumor expression and poor survival of breast cancer patients. Finally, we identified common genetic variations in the CDK5RAP3 locus as potentially associated with breast and ovarian cancer risk in BRCA1 and BRCA2 mutation carriers. Our results uncover CDK5RAP3 as a critical player in DNA repair and breast cancer outcomes.
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Sharp MF, Bythell-Douglas R, Deans AJ, Crismani W. The Fanconi anemia ubiquitin E3 ligase complex as an anti-cancer target. Mol Cell 2021; 81:2278-2289. [PMID: 33984284 DOI: 10.1016/j.molcel.2021.04.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 03/27/2021] [Accepted: 04/21/2021] [Indexed: 10/21/2022]
Abstract
Agents that induce DNA damage can cure some cancers. However, the side effects of chemotherapy are severe because of the indiscriminate action of DNA-damaging agents on both healthy and cancerous cells. DNA repair pathway inhibition provides a less toxic and targeted alternative to chemotherapy. A compelling DNA repair target is the Fanconi anemia (FA) E3 ligase core complex due to its critical-and likely singular-role in the efficient removal of specific DNA lesions. FA pathway inactivation has been demonstrated to specifically kill some types of cancer cells without the addition of exogenous DNA damage, including cells that lack BRCA1, BRCA2, ATM, or functionally related genes. In this perspective, we discuss the genetic and biochemical evidence in support of the FA core complex as a compelling drug target for cancer therapy. In particular, we discuss the genetic, biochemical, and structural data that could rapidly advance our capacity to identify and implement the use of FA core complex inhibitors in the clinic.
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Affiliation(s)
- Michael F Sharp
- Genome Stability Unit, St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia
| | - Rohan Bythell-Douglas
- Genome Stability Unit, St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia
| | - Andrew J Deans
- Genome Stability Unit, St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia; Department of Medicine (St. Vincent's), University of Melbourne, Fitzroy, VIC, Australia
| | - Wayne Crismani
- Genome Stability Unit, St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia; Department of Medicine (St. Vincent's), University of Melbourne, Fitzroy, VIC, Australia.
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Errazquin R, Sieiro E, Moreno P, Ramirez MJ, Lorz C, Peral J, Ortiz J, Casado JA, Roman-Rodriguez FJ, Hanenberg H, Río P, Surralles J, Segrelles C, Garcia-Escudero R. Generating New FANCA-Deficient HNSCC Cell Lines by Genomic Editing Recapitulates the Cellular Phenotypes of Fanconi Anemia. Genes (Basel) 2021; 12:548. [PMID: 33918752 PMCID: PMC8069753 DOI: 10.3390/genes12040548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 03/30/2021] [Accepted: 04/07/2021] [Indexed: 01/22/2023] Open
Abstract
Fanconi anemia (FA) patients have an exacerbated risk of head and neck squamous cell carcinoma (HNSCC). Treatment is challenging as FA patients display enhanced toxicity to standard treatments, including radio/chemotherapy. Therefore, better therapies as well as new disease models are urgently needed. We have used CRISPR/Cas9 editing tools in order to interrupt the human FANCA gene by the generation of insertions/deletions (indels) in exon 4 in two cancer cell lines from sporadic HNSCC having no mutation in FA-genes: CAL27 and CAL33 cells. Our approach allowed efficient editing, subsequent purification of single-cell clones, and Sanger sequencing validation at the edited locus. Clones having frameshift indels in homozygosis did not express FANCA protein and were selected for further analysis. When compared with parental CAL27 and CAL33, FANCA-mutant cell clones displayed a FA-phenotype as they (i) are highly sensitive to DNA interstrand crosslink (ICL) agents such as mitomycin C (MMC) or cisplatin, (ii) do not monoubiquitinate FANCD2 upon MMC treatment and therefore (iii) do not form FANCD2 nuclear foci, and (iv) they display increased chromosome fragility and G2 arrest after diepoxybutane (DEB) treatment. These FANCA-mutant clones display similar growth rates as their parental cells. Interestingly, mutant cells acquire phenotypes associated with more aggressive disease, such as increased migration in wound healing assays. Therefore, CAL27 and CAL33 cells with FANCA mutations are phenocopies of FA-HNSCC cells.
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Affiliation(s)
- Ricardo Errazquin
- Biomedical Research Institute I+12, University Hospital 12 de Octubre, 28041 Madrid, Spain; (R.E.); (C.L.); (C.S.)
- Molecular Oncology Unit, CIEMAT, 28040 Madrid, Spain; (E.S.); (P.M.); (J.P.); (J.O.)
| | - Esther Sieiro
- Molecular Oncology Unit, CIEMAT, 28040 Madrid, Spain; (E.S.); (P.M.); (J.P.); (J.O.)
| | - Pilar Moreno
- Molecular Oncology Unit, CIEMAT, 28040 Madrid, Spain; (E.S.); (P.M.); (J.P.); (J.O.)
| | - María José Ramirez
- Join Research Unit on Genomic Medicine UAB-Sant Pau Biomedical Research Institute, Hospital de la Santa Creu i Sant Pau, 08041 Barcelona, Spain; (M.J.R.); (J.S.)
- Centro de Investigación Biomédica en Enfermedades Raras (CIBERER), 28029 Madrid, Spain; (J.A.C.); (F.J.R.-R.); (P.R.)
| | - Corina Lorz
- Biomedical Research Institute I+12, University Hospital 12 de Octubre, 28041 Madrid, Spain; (R.E.); (C.L.); (C.S.)
- Molecular Oncology Unit, CIEMAT, 28040 Madrid, Spain; (E.S.); (P.M.); (J.P.); (J.O.)
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain
| | - Jorge Peral
- Molecular Oncology Unit, CIEMAT, 28040 Madrid, Spain; (E.S.); (P.M.); (J.P.); (J.O.)
| | - Jessica Ortiz
- Molecular Oncology Unit, CIEMAT, 28040 Madrid, Spain; (E.S.); (P.M.); (J.P.); (J.O.)
| | - José Antonio Casado
- Centro de Investigación Biomédica en Enfermedades Raras (CIBERER), 28029 Madrid, Spain; (J.A.C.); (F.J.R.-R.); (P.R.)
- Hematopoietic Innovative Therapies Division, CIEMAT, 28040 Madrid, Spain
- Instituto de Investigaciones Sanitarias de la Fundación Jiménez Díaz, 28040 Madrid, Spain
| | - Francisco J. Roman-Rodriguez
- Centro de Investigación Biomédica en Enfermedades Raras (CIBERER), 28029 Madrid, Spain; (J.A.C.); (F.J.R.-R.); (P.R.)
- Hematopoietic Innovative Therapies Division, CIEMAT, 28040 Madrid, Spain
- Instituto de Investigaciones Sanitarias de la Fundación Jiménez Díaz, 28040 Madrid, Spain
| | - Helmut Hanenberg
- University Children’s Hospital Essen, University of Duisburg-Essen, 47057 Essen, Germany;
- Department of Otorhinolaryngology & Head/Neck Surgery, Heinrich Heine University, 40225 Düsseldorf, Germany
| | - Paula Río
- Centro de Investigación Biomédica en Enfermedades Raras (CIBERER), 28029 Madrid, Spain; (J.A.C.); (F.J.R.-R.); (P.R.)
- Hematopoietic Innovative Therapies Division, CIEMAT, 28040 Madrid, Spain
- Instituto de Investigaciones Sanitarias de la Fundación Jiménez Díaz, 28040 Madrid, Spain
| | - Jordi Surralles
- Join Research Unit on Genomic Medicine UAB-Sant Pau Biomedical Research Institute, Hospital de la Santa Creu i Sant Pau, 08041 Barcelona, Spain; (M.J.R.); (J.S.)
- Centro de Investigación Biomédica en Enfermedades Raras (CIBERER), 28029 Madrid, Spain; (J.A.C.); (F.J.R.-R.); (P.R.)
| | - Carmen Segrelles
- Biomedical Research Institute I+12, University Hospital 12 de Octubre, 28041 Madrid, Spain; (R.E.); (C.L.); (C.S.)
- Molecular Oncology Unit, CIEMAT, 28040 Madrid, Spain; (E.S.); (P.M.); (J.P.); (J.O.)
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain
| | - Ramon Garcia-Escudero
- Biomedical Research Institute I+12, University Hospital 12 de Octubre, 28041 Madrid, Spain; (R.E.); (C.L.); (C.S.)
- Molecular Oncology Unit, CIEMAT, 28040 Madrid, Spain; (E.S.); (P.M.); (J.P.); (J.O.)
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain
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Kirsch-Volders M, Fenech M. Inflammatory cytokine storms severity may be fueled by interactions of micronuclei and RNA viruses such as COVID-19 virus SARS-CoV-2. A hypothesis. MUTATION RESEARCH. REVIEWS IN MUTATION RESEARCH 2021; 788:108395. [PMID: 34893160 PMCID: PMC8479308 DOI: 10.1016/j.mrrev.2021.108395] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 09/23/2021] [Accepted: 09/23/2021] [Indexed: 12/25/2022]
Abstract
In this review we bring together evidence that (i) RNA viruses are a cause of chromosomal instability and micronuclei (MN), (ii) those individuals with high levels of lymphocyte MN have a weakened immune response and are more susceptible to RNA virus infection and (iii) both RNA virus infection and MN formation can induce inflammatory cytokine production. Based on these observations we propose a hypothesis that those who harbor elevated frequencies of MN within their cells are more prone to RNA virus infection and are more likely, through combined effects of leakage of self-DNA from MN and RNA from viruses, to escalate pro-inflammatory cytokine production via the cyclic GMP-AMP synthase (cGAS), stimulator of interferon genes (STING) and the Senescence Associated Secretory Phenotype (SASP) mechanisms to an extent that is unresolvable and therefore confers high risk of causing tissue damage by an excessive and overtly toxic immune response. The corollaries from this hypothesis are (i) those with abnormally high MN frequency are more prone to infection by RNA viruses; (ii) the extent of cytokine production and pro-inflammatory response to infection by RNA viruses is enhanced and possibly exceeds threshold levels that may be unresolvable in those with elevated MN levels in affected organs; (iii) reduction of MN frequency by improving nutrition and life-style factors increases resistance to RNA virus infection and moderates inflammatory cytokine production to a level that is immunologically efficacious and survivable.
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Affiliation(s)
- Micheline Kirsch-Volders
- Laboratory for Cell Genetics, Department Biology, Faculty of Sciences and Bio-engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.
| | - Michael Fenech
- Genome Health Foundation, North Brighton, SA, 5048, Australia; Clinical and Health Sciences, University of South Australia, SA, 5000, Australia; Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.
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García-de-Teresa B, Rodríguez A, Frias S. Chromosome Instability in Fanconi Anemia: From Breaks to Phenotypic Consequences. Genes (Basel) 2020; 11:E1528. [PMID: 33371494 PMCID: PMC7767525 DOI: 10.3390/genes11121528] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 12/17/2022] Open
Abstract
Fanconi anemia (FA), a chromosomal instability syndrome, is caused by inherited pathogenic variants in any of 22 FANC genes, which cooperate in the FA/BRCA pathway. This pathway regulates the repair of DNA interstrand crosslinks (ICLs) through homologous recombination. In FA proper repair of ICLs is impaired and accumulation of toxic DNA double strand breaks occurs. To repair this type of DNA damage, FA cells activate alternative error-prone DNA repair pathways, which may lead to the formation of gross structural chromosome aberrations of which radial figures are the hallmark of FA, and their segregation during cell division are the origin of subsequent aberrations such as translocations, dicentrics and acentric fragments. The deficiency in DNA repair has pleiotropic consequences in the phenotype of patients with FA, including developmental alterations, bone marrow failure and an extreme risk to develop cancer. The mechanisms leading to the physical abnormalities during embryonic development have not been clearly elucidated, however FA has features of premature aging with chronic inflammation mediated by pro-inflammatory cytokines, which results in tissue attrition, selection of malignant clones and cancer onset. Moreover, chromosomal instability and cell death are not exclusive of the somatic compartment, they also affect germinal cells, as evidenced by the infertility observed in patients with FA.
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Affiliation(s)
- Benilde García-de-Teresa
- Laboratorio de Citogenética, Instituto Nacional de Pediatría, Ciudad de México 04530, Mexico;
- Doctorado en Ciencias Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Alfredo Rodríguez
- Laboratorio de Citogenética, Instituto Nacional de Pediatría, Ciudad de México 04530, Mexico;
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Sara Frias
- Laboratorio de Citogenética, Instituto Nacional de Pediatría, Ciudad de México 04530, Mexico;
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
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Zahnreich S, Poplawski A, Hartel C, Eckhard LS, Galetzka D, Hankeln T, Löbrich M, Marron M, Mirsch J, Ritter S, Scholz-Kreisel P, Spix C, Schmidberger H. Spontaneous and Radiation-Induced Chromosome Aberrations in Primary Fibroblasts of Patients With Pediatric First and Second Neoplasms. Front Oncol 2020; 10:1338. [PMID: 32850427 PMCID: PMC7427586 DOI: 10.3389/fonc.2020.01338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 06/26/2020] [Indexed: 12/28/2022] Open
Abstract
The purpose of the present study was to investigate whether former childhood cancer patients who developed a subsequent secondary primary neoplasm (SPN) are characterized by elevated spontaneous chromosomal instability or cellular and chromosomal radiation sensitivity as surrogate markers of compromised DNA repair compared to childhood cancer patients with a first primary neoplasm (FPN) only or tumor-free controls. Primary skin fibroblasts were obtained in a nested case-control study including 23 patients with a pediatric FPN, 22 matched patients with a pediatric FPN and an SPN, and 22 matched tumor-free donors. Clonogenic cell survival and cytogenetic aberrations in Giemsa-stained first metaphases were assessed after X-irradiation in G1 or on prematurely condensed chromosomes of cells irradiated and analyzed in G2. Fluorescence in situ hybridization was applied to investigate spontaneous transmissible aberrations in selected donors. No significant difference in clonogenic survival or the average yield of spontaneous or radiation-induced aberrations was found between the study populations. However, two donors with an SPN showed striking spontaneous chromosomal instability occurring as high rates of numerical and structural aberrations or non-clonal and clonal translocations. No correlation was found between radiation sensitivity and a susceptibility to a pediatric FPN or a treatment-associated SPN. Together, the results of this unique case-control study show genomic stability and normal radiation sensitivity in normal somatic cells of donors with an early and high intrinsic or therapy-associated tumor risk. These findings provide valuable information for future studies on the etiology of sporadic childhood cancer and therapy-related SPN as well as for the establishment of predictive biomarkers based on altered DNA repair processes.
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Affiliation(s)
- Sebastian Zahnreich
- Department of Radiation Oncology and Radiation Therapy, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Alicia Poplawski
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Carola Hartel
- Department of Biophysics, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - Lukas Stefan Eckhard
- Department of Orthopedic Surgery, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Danuta Galetzka
- Department of Radiation Oncology and Radiation Therapy, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Thomas Hankeln
- Institute of Organismic and Molecular Evolution, Molecular Genetics and Genome Analysis, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Markus Löbrich
- Radiation Biology and DNA Repair, Technical University of Darmstadt, Darmstadt, Germany
| | - Manuela Marron
- Department of Epidemiological Methods and Etiologic Research, Leibniz Institute for Prevention Research and Epidemiology - BIPS, Bremen, Germany
| | - Johanna Mirsch
- Radiation Biology and DNA Repair, Technical University of Darmstadt, Darmstadt, Germany
| | - Sylvia Ritter
- Department of Biophysics, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - Peter Scholz-Kreisel
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Claudia Spix
- German Childhood Cancer Registry, Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Heinz Schmidberger
- Department of Radiation Oncology and Radiation Therapy, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
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9
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Montanuy H, Camps-Fajol C, Carreras-Puigvert J, Häggblad M, Lundgren B, Aza-Carmona M, Helleday T, Minguillón J, Surrallés J. High content drug screening for Fanconi anemia therapeutics. Orphanet J Rare Dis 2020; 15:170. [PMID: 32605631 PMCID: PMC7325660 DOI: 10.1186/s13023-020-01437-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 06/15/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Fanconi anemia is a rare disease clinically characterized by malformations, bone marrow failure and an increased risk of solid tumors and hematologic malignancies. The only therapies available are hematopoietic stem cell transplantation for bone marrow failure or leukemia, and surgical resection for solid tumors. Therefore, there is still an urgent need for new therapeutic options. With this aim, we developed a novel high-content cell-based screening assay to identify drugs with therapeutic potential in FA. RESULTS A TALEN-mediated FANCA-deficient U2OS cell line was stably transfected with YFP-FANCD2 fusion protein. These cells were unable to form fluorescent foci or to monoubiquitinate endogenous or exogenous FANCD2 upon DNA damage and were more sensitive to mitomycin C when compared to the parental wild type counterpart. FANCA correction by retroviral infection restored the cell line's ability to form FANCD2 foci and ubiquitinate FANCD2. The feasibility of this cell-based system was interrogated in a high content screening of 3802 compounds, including a Prestwick library of 1200 FDA-approved drugs. The potential hits identified were then individually tested for their ability to rescue FANCD2 foci and monoubiquitination, and chromosomal stability in the absence of FANCA. CONCLUSIONS While, unfortunately, none of the compounds tested were able to restore cellular FANCA-deficiency, our study shows the potential capacity to screen large compound libraries in the context of Fanconi anemia therapeutics in an optimized and cost-effective platform.
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Affiliation(s)
- Helena Montanuy
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Cristina Camps-Fajol
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona, Spain.,Join Research Unit on Genomic Medicine UAB-Sant Pau, Biomedical Research Institute, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Jordi Carreras-Puigvert
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona, Spain.,Join Research Unit on Genomic Medicine UAB-Sant Pau, Biomedical Research Institute, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades raras, Barcelona, Spain
| | - Maria Häggblad
- Division of Translational Medicine and Chemical Biology, Science for Life Laboratory, Department of Molecular Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.,Currently at Division of Genome Biology, Science for Life Laboratory, Department of Molecular Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Bo Lundgren
- Department of Biochemistry and Biophysics, SciLifelab, Stockholm University, Stockholm, SE, Sweden
| | - Miriam Aza-Carmona
- Institute of Medical and Molecular Genetics and Skeletal dysplasia multidisciplinary Unit, Hospital Universitario La Paz, Universidad Autónoma de Madrid, IdiPaz, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras, Madrid, Spain
| | - Thomas Helleday
- Division of Translational Medicine and Chemical Biology, Science for Life Laboratory, Department of Molecular Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Jordi Minguillón
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades raras, Barcelona, Spain.,Genetics Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Jordi Surrallés
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona, Spain. .,Join Research Unit on Genomic Medicine UAB-Sant Pau, Biomedical Research Institute, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain. .,Centro de Investigación Biomédica en Red de Enfermedades raras, Barcelona, Spain. .,Genetics Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
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Impact of Epigenetics on Complications of Fanconi Anemia: The Role of Vitamin D-Modulated Immunity. Nutrients 2020; 12:nu12051355. [PMID: 32397406 PMCID: PMC7285109 DOI: 10.3390/nu12051355] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/02/2020] [Accepted: 05/06/2020] [Indexed: 12/14/2022] Open
Abstract
Fanconi anemia (FA) is a rare disorder with the clinical characteristics of (i) specific malformations at birth, (ii) progressive bone marrow failure already during early childhood and (iii) dramatically increased risk of developing cancer in early age, such as acute myeloid leukemia and squamous cell carcinoma. Patients with FA show DNA fragility due to a defect in the DNA repair machinery based on predominately recessive mutations in 23 genes. Interestingly, patients originating from the same family and sharing an identical mutation, frequently show significant differences in their clinical presentation. This implies that epigenetics plays an important role in the manifestation of the disease. The biologically active form of vitamin D, 1α,25-dihydroxyvitamin D3 controls cellular growth, differentiation and apoptosis via the modulation of the immune system. The nuclear hormone activates the transcription factor vitamin D receptor that affects, via fine-tuning of the epigenome, the transcription of >1000 human genes. In this review, we discuss that changes in the epigenome, in particular in immune cells, may be central for the clinical manifestation of FA. These epigenetic changes can be modulated by vitamin D suggesting that the individual FA patient’s vitamin D status and responsiveness are of critical importance for disease progression.
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