1
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Rouleau M, Villeneuve L, Allain EP, McCabe-Leroux J, Tremblay S, Nguyen Van Long F, Uchil A, Joly-Beauparlant C, Droit A, Guillemette C. Non-canonical transcriptional regulation of the poor prognostic factor UGT2B17 in chronic lymphocytic leukemic and normal B cells. BMC Cancer 2024; 24:410. [PMID: 38566115 PMCID: PMC10985967 DOI: 10.1186/s12885-024-12143-7] [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: 08/22/2023] [Accepted: 03/19/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND High expression of the glycosyltransferase UGT2B17 represents an independent adverse prognostic marker in chronic lymphocytic leukemia (CLL). It also constitutes a predictive marker for therapeutic response and a drug resistance mechanism. The key determinants driving expression of the UGT2B17 gene in normal and leukemic B-cells remain undefined. The UGT2B17 transcriptome is complex and is comprised of at least 10 alternative transcripts, identified by previous RNA-sequencing of liver and intestine. We hypothesized that the transcriptional program regulating UGT2B17 in B-lymphocytes is distinct from the canonical expression previously characterized in the liver. RESULTS RNA-sequencing and genomics data revealed a specific genomic landscape at the UGT2B17 locus in normal and leukemic B-cells. RNA-sequencing and quantitative PCR data indicated that the UGT2B17 enzyme is solely encoded by alternative transcripts expressed in CLL patient cells and not by the canonical transcript widely expressed in the liver and intestine. Chromatin accessible regions (ATAC-Seq) in CLL cells mapped with alternative promoters and non-coding exons, which may be derived from endogenous retrotransposon elements. By luciferase reporter assays, we identified key cis-regulatory STAT3, RELA and interferon regulatory factor (IRF) binding sequences driving the expression of UGT2B17 in lymphoblastoid and leukemic B-cells. Electrophoretic mobility shift assays and pharmacological inhibition demonstrated key roles for the CLL prosurvival transcription factors STAT3 and NF-κB in the leukemic expression of UGT2B17. CONCLUSIONS UGT2B17 expression in B-CLL is driven by key regulators of CLL progression. Our data suggest that a NF-κB/STAT3/IRF/UGT2B17 axis may represent a novel B-cell pathway promoting disease progression and drug resistance.
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Affiliation(s)
- Michèle Rouleau
- Faculty of Pharmacy, Centre Hospitalier Universitaire de Québec Research Center - Université Laval (CRCHUQc- UL), Université Laval, Québec, QC, Canada
- Cancer research center of Université Laval, Québec, Canada
| | - Lyne Villeneuve
- Faculty of Pharmacy, Centre Hospitalier Universitaire de Québec Research Center - Université Laval (CRCHUQc- UL), Université Laval, Québec, QC, Canada
- Cancer research center of Université Laval, Québec, Canada
| | - Eric P Allain
- Molecular Genetics Laboratory, Vitalité Health Network, Dr. Georges-L.-Dumont University Hospital Center, Moncton, NB, Canada
| | - Jules McCabe-Leroux
- Faculty of Pharmacy, Centre Hospitalier Universitaire de Québec Research Center - Université Laval (CRCHUQc- UL), Université Laval, Québec, QC, Canada
- Cancer research center of Université Laval, Québec, Canada
| | - Sophie Tremblay
- Faculty of Pharmacy, Centre Hospitalier Universitaire de Québec Research Center - Université Laval (CRCHUQc- UL), Université Laval, Québec, QC, Canada
- Cancer research center of Université Laval, Québec, Canada
| | - Flora Nguyen Van Long
- Faculty of Pharmacy, Centre Hospitalier Universitaire de Québec Research Center - Université Laval (CRCHUQc- UL), Université Laval, Québec, QC, Canada
- Cancer research center of Université Laval, Québec, Canada
| | - Ashwini Uchil
- Faculty of Pharmacy, Centre Hospitalier Universitaire de Québec Research Center - Université Laval (CRCHUQc- UL), Université Laval, Québec, QC, Canada
- Cancer research center of Université Laval, Québec, Canada
| | - Charles Joly-Beauparlant
- Cancer research center of Université Laval, Québec, Canada
- CRCHUQc-UL and Faculty of Medicine, Université Laval, Québec, Québec, Canada
| | - Arnaud Droit
- Cancer research center of Université Laval, Québec, Canada
- CRCHUQc-UL and Faculty of Medicine, Université Laval, Québec, Québec, Canada
| | - Chantal Guillemette
- Faculty of Pharmacy, Centre Hospitalier Universitaire de Québec Research Center - Université Laval (CRCHUQc- UL), Université Laval, Québec, QC, Canada.
- Cancer research center of Université Laval, Québec, Canada.
- Canada Research Chair in Pharmacogenomics, Faculty of Pharmacy, Université Laval, Québec, QC, Canada.
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Nguyen Van Long F, Valcourt‐Gendron D, Caron P, Rouleau M, Villeneuve L, Simonyan D, Le T, Sergerie R, Laverdière I, Vanura K, Guillemette C. Untargeted metabolomics identifies metabolic dysregulation of sphingolipids associated with aggressive chronic lymphocytic leukaemia and poor survival. Clin Transl Med 2023; 13:e1442. [PMID: 38037464 PMCID: PMC10689972 DOI: 10.1002/ctm2.1442] [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: 05/11/2023] [Revised: 09/19/2023] [Accepted: 10/01/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND Metabolic dependencies of chronic lymphocytic leukaemia (CLL) cells may represent new personalized treatment approaches in patients harbouring unfavourable features. METHODS Here, we used untargeted metabolomics and lipidomics analyses to isolate metabolomic features associated with aggressive CLL and poor survival outcomes. We initially focused on profiles associated with overexpression of the adverse metabolic marker glycosyltransferase (UGT2B17) associated with poor survival and drug resistance. RESULTS Leukaemic B-cell metabolomes indicated a significant perturbation in lipids, predominantly bio-active sphingolipids. Expression of numerous enzyme-encoding genes of sphingolipid biosynthesis pathways was significantly associated with shorter patient survival. Targeted metabolomics further exposed higher circulating levels of glucosylceramides (C16:0 GluCer) in CLL patients relative to healthy donors and an aggressive cancer biology. In multivariate analyses, C16:0 GluCer and sphinganine were independent prognostic markers and were inversely linked to treatment-free survival. These two sphingolipid species function as antagonistic mediators, with sphinganine being pro-apoptotic and GluCer being pro-proliferative, tested in leukemic B-CLL cell models. Blocking GluCer synthesis using ceramide glucosyltransferase inhibitors induced cell death and reduced the proliferative phenotype, which further sensitized a leukaemic B-cell model to the anti-leukaemics fludarabine and ibrutinib in vitro. CONCLUSIONS Specific sphingolipids may serve as prognostic markers in CLL, and inhibiting enzymatic pathways involved in their biosynthesis has potential as a therapaeutic approach.
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Affiliation(s)
- Flora Nguyen Van Long
- Centre Hospitalier Universitaire de Québec Research Center‐Université Laval (CRCHUQc‐UL)Faculty of Pharmacy and Centre de Recherche sur le Cancer (CRC‐UL)Université LavalQuébecCanada
| | - Délya Valcourt‐Gendron
- Centre Hospitalier Universitaire de Québec Research Center‐Université Laval (CRCHUQc‐UL)Faculty of Pharmacy and Centre de Recherche sur le Cancer (CRC‐UL)Université LavalQuébecCanada
| | - Patrick Caron
- Centre Hospitalier Universitaire de Québec Research Center‐Université Laval (CRCHUQc‐UL)Faculty of Pharmacy and Centre de Recherche sur le Cancer (CRC‐UL)Université LavalQuébecCanada
| | - Michèle Rouleau
- Centre Hospitalier Universitaire de Québec Research Center‐Université Laval (CRCHUQc‐UL)Faculty of Pharmacy and Centre de Recherche sur le Cancer (CRC‐UL)Université LavalQuébecCanada
| | - Lyne Villeneuve
- Centre Hospitalier Universitaire de Québec Research Center‐Université Laval (CRCHUQc‐UL)Faculty of Pharmacy and Centre de Recherche sur le Cancer (CRC‐UL)Université LavalQuébecCanada
| | - David Simonyan
- Statistical and Clinical Research PlatformCRCHUQc‐ULQuébecCanada
| | - Trang Le
- Department of Medicine IDivision of Haematology and HaemostaseologyMedical University of ViennaViennaAustria
| | - Roxanne Sergerie
- Centre Hospitalier Universitaire de Québec Research Center‐Université Laval (CRCHUQc‐UL)Faculty of Pharmacy and Centre de Recherche sur le Cancer (CRC‐UL)Université LavalQuébecCanada
| | - Isabelle Laverdière
- Centre Hospitalier Universitaire de Québec Research Center‐Université Laval (CRCHUQc‐UL)Faculty of Pharmacy and Centre de Recherche sur le Cancer (CRC‐UL)Université LavalQuébecCanada
| | - Katrina Vanura
- Department of Medicine IDivision of Haematology and HaemostaseologyMedical University of ViennaViennaAustria
| | - Chantal Guillemette
- Centre Hospitalier Universitaire de Québec Research Center‐Université Laval (CRCHUQc‐UL)Faculty of Pharmacy and Centre de Recherche sur le Cancer (CRC‐UL)Université LavalQuébecCanada
- Canada Research Chair in PharmacogenomicsQuébecCanada
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3
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Wagner A, Rouleau M, Villeneuve L, Le T, Peltier C, Allain ÉP, Beaudoin C, Tremblay S, Courtier F, Nguyen Van Long F, Laverdière I, Lévesque É, Banerji V, Vanura K, Guillemette C. A Non-Canonical Role for the Glycosyltransferase Enzyme UGT2B17 as a Novel Constituent of the B Cell Receptor Signalosome. Cells 2023; 12:cells12091295. [PMID: 37174695 PMCID: PMC10177405 DOI: 10.3390/cells12091295] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/21/2023] [Accepted: 04/28/2023] [Indexed: 05/15/2023] Open
Abstract
In chronic lymphocytic leukemia (CLL), an elevated glycosyltransferase UGT2B17 expression (UGT2B17HI) identifies a subgroup of patients with shorter survival and poor drug response. We uncovered a mechanism, possibly independent of its enzymatic function, characterized by an enhanced expression and signaling of the proximal effectors of the pro-survival B cell receptor (BCR) pathway and elevated Bruton tyrosine kinase (BTK) phosphorylation in B-CLL cells from UGT2B17HI patients. A prominent feature of B-CLL cells is the strong correlation of UGT2B17 expression with the adverse marker ZAP70 encoding a tyrosine kinase that promotes B-CLL cell survival. Their combined high expression levels in the treatment of naïve patients further defined a prognostic group with the highest risk of poor survival. In leukemic cells, UGT2B17 knockout and repression of ZAP70 reduced proliferation, suggesting that the function of UGT2B17 might involve ZAP70. Mechanistically, UGT2B17 interacted with several kinases of the BCR pathway, including ZAP70, SYK, and BTK, revealing a potential therapeutic vulnerability. The dual SYK and JAK/STAT6 inhibitor cerdulatinib most effectively compromised the proliferative advantage conferred by UGT2B17 compared to the selective BTK inhibitor ibrutinib. Findings point to an oncogenic role for UGT2B17 as a novel constituent of BCR signalosome also connected with microenvironmental signaling.
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Affiliation(s)
- Antoine Wagner
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
| | - Michèle Rouleau
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
| | - Lyne Villeneuve
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
| | - Trang Le
- Department of Medicine I, Division of Haematology and Haemostaseology, Medical University of Vienna, 1090 Vienna, Austria
| | - Cheryl Peltier
- Department of Internal Medicine & Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 3P4, Canada
- CancerCare Manitoba Research Institute, Cancer Care Manitoba, Winnipeg, MB R3E 0V9, Canada
| | - Éric P Allain
- Molecular Genetics Laboratory, Dr. Georges-L-Dumont University Hospital Center, Moncton, NB E1C 2Z3, Canada
| | - Caroline Beaudoin
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
| | - Sophie Tremblay
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
| | - Fréderic Courtier
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
| | - Flora Nguyen Van Long
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
| | - Isabelle Laverdière
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
| | - Éric Lévesque
- CRCHUQc-UL, Faculty of Medicine, and CRC-UL, Université Laval, Québec, QC G1V 4G2, Canada
| | - Versha Banerji
- Department of Internal Medicine & Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 3P4, Canada
- CancerCare Manitoba Research Institute, Cancer Care Manitoba, Winnipeg, MB R3E 0V9, Canada
| | - Katrina Vanura
- Department of Medicine I, Division of Haematology and Haemostaseology, Medical University of Vienna, 1090 Vienna, Austria
| | - Chantal Guillemette
- Centre Hospitalier Universitaire de Québec Research Center-Université Laval (CRCHUQc-UL), Faculty of Pharmacy, and Centre de Recherche sur le Cancer de l'Université Laval (CRC-UL), Université Laval, Québec, QC G1V 4G2, Canada
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4
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Caron P, Van Long FN, Rouleau M, Bujold E, Fortin P, Mohammadi S, Lévesque É, Breton S, Guillemette C. A liquid chromatography-mass spectrometry assay for the quantification of nucleotide sugars in human plasma and urine specimens and its clinical application. J Chromatogr A 2022; 1677:463296. [DOI: 10.1016/j.chroma.2022.463296] [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] [Received: 04/26/2022] [Revised: 06/16/2022] [Accepted: 06/29/2022] [Indexed: 10/17/2022]
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5
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Nguyen Van Long F, Lardy-Cleaud A, Carène D, Rossoni C, Catez F, Rollet P, Pion N, Monchiet D, Dolbeau A, Martin M, Simioni V, Bray S, Le Beherec D, Mosele F, Bouakka I, Colombe-Vermorel A, Odeyer L, Diot A, Jordan LB, Thompson AM, Jamen F, Dubois T, Chabaud S, Michiels S, Treilleux I, Bourdon JC, Pérol D, Puisieux A, André F, Diaz JJ, Marcel V. Low level of Fibrillarin, a ribosome biogenesis factor, is a new independent marker of poor outcome in breast cancer. BMC Cancer 2022; 22:526. [PMID: 35545761 PMCID: PMC9092774 DOI: 10.1186/s12885-022-09552-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 06/01/2021] [Accepted: 04/11/2022] [Indexed: 12/02/2022] Open
Abstract
Background A current critical need remains in the identification of prognostic and predictive markers in early breast cancer. It appears that a distinctive trait of cancer cells is their addiction to hyperactivation of ribosome biogenesis. Thus, ribosome biogenesis might be an innovative source of biomarkers that remains to be evaluated. Methods Here, fibrillarin (FBL) was used as a surrogate marker of ribosome biogenesis due to its essential role in the early steps of ribosome biogenesis and its association with poor prognosis in breast cancer when overexpressed. Using 3,275 non-metastatic primary breast tumors, we analysed FBL mRNA expression levels and protein nucleolar organisation. Usage of TCGA dataset allowed transcriptomic comparison between the different FBL expression levels-related breast tumours. Results We unexpectedly discovered that in addition to breast tumours expressing high level of FBL, about 10% of the breast tumors express low level of FBL. A correlation between low FBL mRNA level and lack of FBL detection at protein level using immunohistochemistry was observed. Interestingly, multivariate analyses revealed that these low FBL tumors displayed poor outcome compared to current clinical gold standards. Transcriptomic data revealed that FBL expression is proportionally associated with distinct amount of ribosomes, low FBL level being associated with low amount of ribosomes. Moreover, the molecular programs supported by low and high FBL expressing tumors were distinct. Conclusion Altogether, we identified FBL as a powerful ribosome biogenesis-related independent marker of breast cancer outcome. Surprisingly we unveil a dual association of the ribosome biogenesis FBL factor with prognosis. These data suggest that hyper- but also hypo-activation of ribosome biogenesis are molecular traits of distinct tumors. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-09552-x.
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Affiliation(s)
- Flora Nguyen Van Long
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Audrey Lardy-Cleaud
- Biostatistics Unit, Department of Clinical Research, Léon Bérard Cancer Centre, 28 rue Laennec, 69008, Lyon, France
| | - Dimitri Carène
- Predictive Biomarkers and Novel Therapeutic Strategies Group, Institut Gustave Roussy, University of Paris Sud, INSERM 981, Université Paris Saclay, 114 rue Edouard Vaillant, 94800, Villejuif, France.,Department of Biostatistics and Epidemiology, Institut Gustave Roussy, 94800, Villejuif, France
| | - Caroline Rossoni
- Department of Biostatistics and Epidemiology, Institut Gustave Roussy, 94800, Villejuif, France
| | - Frédéric Catez
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Paul Rollet
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Nathalie Pion
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Déborah Monchiet
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Agathe Dolbeau
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Marjorie Martin
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Valentin Simioni
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Susan Bray
- Tayside Tissue Bank, Ninewells Hospital and Medical School, NHS Tayside, Dundee, DD1 9SY, Scotland, UK
| | - Doris Le Beherec
- Department Translational Research, Institut Gustave Roussy, 94800, Villejuif, France
| | - Fernanda Mosele
- Predictive Biomarkers and Novel Therapeutic Strategies Group, Institut Gustave Roussy, University of Paris Sud, INSERM 981, Université Paris Saclay, 114 rue Edouard Vaillant, 94800, Villejuif, France
| | - Ibrahim Bouakka
- Predictive Biomarkers and Novel Therapeutic Strategies Group, Institut Gustave Roussy, University of Paris Sud, INSERM 981, Université Paris Saclay, 114 rue Edouard Vaillant, 94800, Villejuif, France
| | - Amélie Colombe-Vermorel
- Department of Translational Research and Innovation, Léon Bérard Cancer Centre, 28 rue Laennec, 69008, Lyon, France
| | - Laetitia Odeyer
- Department of Translational Research and Innovation, Léon Bérard Cancer Centre, 28 rue Laennec, 69008, Lyon, France
| | - Alexandra Diot
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, DD1 9SY, Scotland, UK
| | - Lee B Jordan
- Department of Pathology, University of Dundee, Ninewells Hospital and Medical School, Dundee, DD1 9SY, Scotland, UK
| | - Alastair M Thompson
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, DD1 9SY, Scotland, UK.,Olga Keith Wiess Chair of Surgery, Dan L. Duncan Breast Center, Division of Surgical Oncology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Françoise Jamen
- Université Paris-Saclay Institute of Neuroscience, CNRS UMR9197, Gif-sur-Yvette, France.,Université Paris-Saclay, CIAMS, 91405, Orsay, Cedex, France
| | - Thierry Dubois
- Breast Cancer Biology Group, Translational Research Department, Institut Curie-PSL Research University, 26 rue d'Ulm, 75005, Paris, France
| | - Sylvie Chabaud
- Biostatistics Unit, Department of Clinical Research, Léon Bérard Cancer Centre, 28 rue Laennec, 69008, Lyon, France
| | - Stefan Michiels
- Department of Biostatistics and Epidemiology, Institut Gustave Roussy, 94800, Villejuif, France
| | - Isabelle Treilleux
- Department of Translational Research and Innovation, Léon Bérard Cancer Centre, 28 rue Laennec, 69008, Lyon, France
| | - Jean-Christophe Bourdon
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, DD1 9SY, Scotland, UK
| | - David Pérol
- Biostatistics Unit, Department of Clinical Research, Léon Bérard Cancer Centre, 28 rue Laennec, 69008, Lyon, France
| | - Alain Puisieux
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France.,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France
| | - Fabrice André
- Predictive Biomarkers and Novel Therapeutic Strategies Group, Institut Gustave Roussy, University of Paris Sud, INSERM 981, Université Paris Saclay, 114 rue Edouard Vaillant, 94800, Villejuif, France
| | - Jean-Jacques Diaz
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France. .,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France. .,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France.
| | - Virginie Marcel
- Cancer Research Center of Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Léon Bérard Cancer Centre, Cheney A, 28 rue Laennec, 69373 cedex 08, Lyon, France. .,Institut Convergence PLAsCAN, 69373 cedex 08, Lyon, France. .,DevWeCan Labex Laboratory, 69373 cedex 08, Lyon, France.
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6
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Marcel V, Kielbassa J, Marchand V, Natchiar KS, Paraqindes H, Nguyen Van Long F, Ayadi L, Bourguignon-Igel V, Lo Monaco P, Monchiet D, Scott V, Tonon L, Bray SE, Diot A, Jordan LB, Thompson AM, Bourdon JC, Dubois T, André F, Catez F, Puisieux A, Motorin Y, Klaholz BP, Viari A, Diaz JJ. Ribosomal RNA 2'O-methylation as a novel layer of inter-tumour heterogeneity in breast cancer. NAR Cancer 2020; 2:zcaa036. [PMID: 34316693 PMCID: PMC8210124 DOI: 10.1093/narcan/zcaa036] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [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: 07/08/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 12/12/2022] Open
Abstract
Recent epitranscriptomics studies unravelled that ribosomal RNA (rRNA) 2′O-methylation is an additional layer of gene expression regulation highlighting the ribosome as a novel actor of translation control. However, this major finding lies on evidences coming mainly, if not exclusively, from cellular models. Using the innovative next-generation RiboMeth-seq technology, we established the first rRNA 2′O-methylation landscape in 195 primary human breast tumours. We uncovered the existence of compulsory/stable sites, which show limited inter-patient variability in their 2′O-methylation level, which map on functionally important sites of the human ribosome structure and which are surrounded by variable sites found from the second nucleotide layers. Our data demonstrate that some positions within the rRNA molecules can tolerate absence of 2′O-methylation in tumoral and healthy tissues. We also reveal that rRNA 2′O-methylation exhibits intra- and inter-patient variability in breast tumours. Its level is indeed differentially associated with breast cancer subtype and tumour grade. Altogether, our rRNA 2′O-methylation profiling of a large-scale human sample collection provides the first compelling evidence that ribosome variability occurs in humans and suggests that rRNA 2′O-methylation might represent a relevant element of tumour biology useful in clinic. This novel variability at molecular level offers an additional layer to capture the cancer heterogeneity and associates with specific features of tumour biology thus offering a novel targetable molecular signature in cancer.
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Affiliation(s)
- Virginie Marcel
- Univ Lyon, Université Claude Bernard Lyon 1, Inserm 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France
| | - Janice Kielbassa
- Synergie Lyon Cancer, Gilles Thomas Bioinformatics Platform, Centre Léon Bérard, 69008 Lyon, France
| | - Virginie Marchand
- UMS2008 IBSLor CNRS-INSERM-Lorraine University, Biopôle, 9 avenue de la forêt de haye, 54505 Vandoeuvre-les-Nancy, France
| | - Kundhavai S Natchiar
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, IGBMC, CNRS, Inserm, Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France
| | - Hermes Paraqindes
- Univ Lyon, Université Claude Bernard Lyon 1, Inserm 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France
| | - Flora Nguyen Van Long
- Univ Lyon, Université Claude Bernard Lyon 1, Inserm 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France
| | - Lilia Ayadi
- UMS2008 IBSLor CNRS-INSERM-Lorraine University, Biopôle, 9 avenue de la forêt de haye, 54505 Vandoeuvre-les-Nancy, France
| | - Valérie Bourguignon-Igel
- UMS2008 IBSLor CNRS-INSERM-Lorraine University, Biopôle, 9 avenue de la forêt de haye, 54505 Vandoeuvre-les-Nancy, France
| | - Piero Lo Monaco
- Univ Lyon, Université Claude Bernard Lyon 1, Inserm 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France
| | - Déborah Monchiet
- Univ Lyon, Université Claude Bernard Lyon 1, Inserm 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France
| | - Véronique Scott
- Predictive biomarkers and novel therapeutic strategies Group, Institut Gustave Roussy, University of Paris Sud, INSERM 981, Université Paris Saclay, 114 rue Edouard Vaillant, 94800 Villejuif, France
| | - Laurie Tonon
- Synergie Lyon Cancer, Gilles Thomas Bioinformatics Platform, Centre Léon Bérard, 69008 Lyon, France
| | - Susan E Bray
- Tayside Tissue Bank, Ninewells Hospital and Medical School, NHS Tayside, Dundee DD1 9SY, Scotland, UK
| | - Alexandra Diot
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, Scotland, UK
| | - Lee B Jordan
- Department of Pathology, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Alastair M Thompson
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, Scotland, UK
| | - Jean-Christophe Bourdon
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, Scotland, UK
| | - Thierry Dubois
- Breast Cancer Biology Group, Translational Research Department, Institut Curie-PSL Research University, 26 rue d'Ulm, 75005 Paris, France
| | - Fabrice André
- Predictive biomarkers and novel therapeutic strategies Group, Institut Gustave Roussy, University of Paris Sud, INSERM 981, Université Paris Saclay, 114 rue Edouard Vaillant, 94800 Villejuif, France
| | - Frédéric Catez
- Univ Lyon, Université Claude Bernard Lyon 1, Inserm 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France
| | - Alain Puisieux
- Univ Lyon, Université Claude Bernard Lyon 1, Inserm 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France
| | - Yuri Motorin
- UMS2008 IBSLor CNRS-INSERM-Lorraine University, Biopôle, 9 avenue de la forêt de haye, 54505 Vandoeuvre-les-Nancy, France
| | - Bruno P Klaholz
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, IGBMC, CNRS, Inserm, Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France
| | - Alain Viari
- Synergie Lyon Cancer, Gilles Thomas Bioinformatics Platform, Centre Léon Bérard, 69008 Lyon, France
| | - Jean-Jacques Diaz
- Univ Lyon, Université Claude Bernard Lyon 1, Inserm 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France
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7
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Sornjai W, Nguyen Van Long F, Pion N, Pasquer A, Saurin JC, Marcel V, Diaz JJ, Mertani HC, Smith DR. Iron and hepcidin mediate human colorectal cancer cell growth. Chem Biol Interact 2020; 319:109021. [PMID: 32092301 DOI: 10.1016/j.cbi.2020.109021] [Citation(s) in RCA: 14] [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: 10/31/2019] [Revised: 01/24/2020] [Accepted: 02/20/2020] [Indexed: 12/20/2022]
Abstract
High dietary iron intake is a risk factor for the development of colorectal cancer. However, how iron subsequently impacts the proliferation of colorectal cancer cells remains unclear. This study determined the expression of six iron regulatory genes in twenty-one human colorectal cancer (CRC) biopsies and matched normal colonic tissue. The results show that only hepcidin and ferritin heavy chain expression were increased in CRC biopsies as compared to matched normal tissues. Four established human CRC cell lines, HT-29, HCT-116, SW-620 and SW-480 were subsequently examined for their growth in response to increasing concentrations of iron, and iron depletion. Real time cell growth assay showed a significant inhibitory effect of acute iron loading in HCT-116 cells (IC50 = 258.25 μM at 72 h), and no significant effects in other cell types. However, ten week treatment with iron significantly reduced HT-29 and SW-620 cell growth, whereas no effect was seen in HCT-116 and SW-480 cells. Intracellular labile iron depletion induced the complete growth arrest and detachment of all of the CRC cell types except for the SW-620 cell line which was not affected in its growth. Treatment of starved CRC cells with hepcidin, the major regulator of iron metabolism, induced a significant stimulation of HT-29 cell growth but did not affect the growth of the other cell types. Collectively these results show that iron is central to CRC cell growth in a manner that is not identical between acute and chronic loading, and that is specific to the CRC cell type.
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Affiliation(s)
- Wannapa Sornjai
- Institute of Molecular Biosciences, Mahidol University, 25/25 Phuttamonthon Sai 4, Salaya, Nakon Pathom, 73170, Thailand
| | - Flora Nguyen Van Long
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052-CNRS 5286, Centre Léon Bérard, Université Claude Bernard Lyon I, Université de Lyon, Lyon, 69008, France
| | - Nathalie Pion
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052-CNRS 5286, Centre Léon Bérard, Université Claude Bernard Lyon I, Université de Lyon, Lyon, 69008, France
| | - Arnaud Pasquer
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052-CNRS 5286, Centre Léon Bérard, Université Claude Bernard Lyon I, Université de Lyon, Lyon, 69008, France
| | - Jean-Christophe Saurin
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052-CNRS 5286, Centre Léon Bérard, Université Claude Bernard Lyon I, Université de Lyon, Lyon, 69008, France
| | - Virginie Marcel
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052-CNRS 5286, Centre Léon Bérard, Université Claude Bernard Lyon I, Université de Lyon, Lyon, 69008, France
| | - Jean Jacques Diaz
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052-CNRS 5286, Centre Léon Bérard, Université Claude Bernard Lyon I, Université de Lyon, Lyon, 69008, France
| | - Hichem C Mertani
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052-CNRS 5286, Centre Léon Bérard, Université Claude Bernard Lyon I, Université de Lyon, Lyon, 69008, France.
| | - Duncan R Smith
- Institute of Molecular Biosciences, Mahidol University, 25/25 Phuttamonthon Sai 4, Salaya, Nakon Pathom, 73170, Thailand.
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Ussowicz M, Marcel V, Long FNV, Kazanowska B, Diaz JJ, Wołowiec D. Analysis of the rRNA methylation complex components in pediatric B-cell precursor acute lymphoblastic leukemia: A pilot study. ADV CLIN EXP MED 2020; 29:107-113. [PMID: 32011831 DOI: 10.17219/acem/112608] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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] [Indexed: 11/24/2022]
Abstract
BACKGROUND Dysregulation of ribosome biogenesis and alteration of ribosome composition, including alteration in ribosomal RNA (rRNA) 2'-O-ribose methylation, can play a role in malignant transformation and cancer progression. Several studies recently reported that components of the rRNA methylation complex are associated with leukemogenesis. However, no study ever investigated the alteration of ribosome biogenesis factors in the most common pediatric malignancy - B-cell precursor acute lymphoblastic leukemia (BCP-ALL). OBJECTIVES The objective of this study was to examine the expression of factors building the rRNA methylation complex, either the protein components (1 methyl-transferase (FBL), NOP56, NOP58, NHP2L1) or some RNA components (box C/D snoRNAs: SNORD35B, SNORD65, SNORD46, SNORD50A, SNORD38B), as well as CMYC, and nucleolin (NCL) - a protein involved in rRNA synthesis. Clinical effects in children with BCP-ALL were also investigated. MATERIAL AND METHODS The factors involved in ribosome biogenesis were studied in 28 children with BCP-ALL with the use of real-time polymerase chain reaction (RT-PCR) using the BioMark HD System (Fluidigm, San Francisco, USA) in cDNA prepared from the bone marrow samples collected at diagnosis. RESULTS Strong correlations were observed between NOP56, NOP58 and NCL, and multiple weaker correlations were observed in the box C/D snoRNA category, and between box C/D snoRNA and transcripts coding proteins of the rRNA methylation complex. The expression of analyzed transcripts did not correlate with the initial white blood cells count (WBC) or with bone marrow blast percentage. Ribosome biogenesis upregulation with overexpression of FBL and NOP56, and CMYC was found in patients who subsequently relapsed and the upregulation signature was not associated with known risk predictors. CONCLUSIONS This is the first report on the clinical aspect of ribosome biogenesis in pediatric BCP-ALL, and it shows that overexpression of CMYC and C/D box nucleoproteins FBL and NOP56 is an antecedent event in patients who subsequently relapse. The dysregulation pattern is different from the previous reports in acute myeloid leukemia (AML), suggesting that dysregulation of ribosome biogenesis is specific for BCP-ALL.
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Affiliation(s)
- Marek Ussowicz
- Department of Pediatric Bone Marrow Transplantation, Oncology and Hematology, Wroclaw Medical University, Poland
| | - Virginie Marcel
- The Université Claude Bernard Lyon 1, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, France
| | - Flora Nguyen Van Long
- The Université Claude Bernard Lyon 1, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, France
| | - Bernarda Kazanowska
- Department of Pediatric Bone Marrow Transplantation, Oncology and Hematology, Wroclaw Medical University, Poland
| | - Jean-Jacques Diaz
- The Université Claude Bernard Lyon 1, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, France
| | - Dariusz Wołowiec
- Department and Clinic of Hematology, Blood Neoplasms and Bone Marrow Transplantation, Wroclaw Medical University, Poland
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9
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Nguyen Van Long F, Lardy-Cleaud A, Bray S, Chabaud S, Dubois T, Diot A, Jordan LB, Thompson AM, Bourdon JC, Perol D, Bouvet P, Diaz JJ, Marcel V. Druggable Nucleolin Identifies Breast Tumours Associated with Poor Prognosis That Exhibit Different Biological Processes. Cancers (Basel) 2018; 10:cancers10100390. [PMID: 30360377 PMCID: PMC6210205 DOI: 10.3390/cancers10100390] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/12/2018] [Accepted: 10/18/2018] [Indexed: 11/16/2022] Open
Abstract
Background: Nucleolin (NCL) is a multifunctional protein with oncogenic properties. Anti-NCL drugs show strong cytotoxic effects, including in triple-negative breast cancer (TNBC) models, and are currently being evaluated in phase II clinical trials. However, few studies have investigated the clinical value of NCL and whether NCL stratified cancer patients. Here, we have investigated for the first time the association of NCL with clinical characteristics in breast cancers independently of the different subtypes. Methods: Using two independent series (n = 216; n = 661), we evaluated the prognostic value of NCL in non-metastatic breast cancers using univariate and/or multivariate Cox-regression analyses. Results: We reported that NCL mRNA expression levels are markers of poor survivals independently of tumour size and lymph node invasion status (n = 216). In addition, an association of NCL expression levels with poor survival was observed in TNBC (n = 40, overall survival (OS) p = 0.0287, disease-free survival (DFS) p = 0.0194). Transcriptomic analyses issued from The Cancer Genome Atlas (TCGA) database (n = 661) revealed that breast tumours expressing either low or high NCL mRNA expression levels exhibit different gene expression profiles. These data suggest that tumours expressing high NCL mRNA levels are different from those expressing low NCL mRNA levels. Conclusions: NCL is an independent marker of prognosis in breast cancers. We anticipated that anti-NCL is a promising therapeutic strategy that could rapidly be evaluated in high NCL-expressing tumours to improve breast cancer management.
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Affiliation(s)
- Flora Nguyen Van Long
- Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, CEDEX 08, 69373 Lyon, France; (F.N.V.L.); (P.B.)
| | - Audrey Lardy-Cleaud
- Department of Clinical Research, Léon Bérard Cancer Centre, 28 rue Laennec, 69008 Lyon, France; (A.L.-C.); (S.C.); (D.P.)
| | - Susan Bray
- Tayside Tissue Bank, Ninewells Hospital and Medical School, NHS Tayside, Dundee DD1 9SY, Scotland, UK;
| | - Sylvie Chabaud
- Department of Clinical Research, Léon Bérard Cancer Centre, 28 rue Laennec, 69008 Lyon, France; (A.L.-C.); (S.C.); (D.P.)
| | - Thierry Dubois
- Breast Cancer Biology Group, Translational Research Department, PSL Research University, Institut Curie, 26 rue d’Ulm, 75005 Paris, France;
| | - Alexandra Diot
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, Scotland, UK; (A.D.); (A.M.T.); (J.-C.B.)
| | - Lee B. Jordan
- Department of Pathology, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK;
| | - Alastair M. Thompson
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, Scotland, UK; (A.D.); (A.M.T.); (J.-C.B.)
- Olga Keith Wiess Chair of Surgery, Dan L. Duncan Breast Center, Division of Surgical Oncology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jean-Christophe Bourdon
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, Scotland, UK; (A.D.); (A.M.T.); (J.-C.B.)
| | - David Perol
- Department of Clinical Research, Léon Bérard Cancer Centre, 28 rue Laennec, 69008 Lyon, France; (A.L.-C.); (S.C.); (D.P.)
| | - Philippe Bouvet
- Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, CEDEX 08, 69373 Lyon, France; (F.N.V.L.); (P.B.)
- Ecole Normale Supérieure de Lyon, Université de Lyon, CEDEX 07, 69342 Lyon, France
| | - Jean-Jacques Diaz
- Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, CEDEX 08, 69373 Lyon, France; (F.N.V.L.); (P.B.)
- Correspondence: (J.-J.D.); (V.M.); Tel.: +33-42655-2819 (J.-J.D.); +33-42655-6745 (V.M.)
| | - Virginie Marcel
- Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, CEDEX 08, 69373 Lyon, France; (F.N.V.L.); (P.B.)
- Correspondence: (J.-J.D.); (V.M.); Tel.: +33-42655-2819 (J.-J.D.); +33-42655-6745 (V.M.)
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Abstract
Since its discovery in 1979, p53 has shown multiple facets. Initially the tumor suppressor p53 protein was considered as a stress sensor able to maintain the genome integrity by regulating transcription of genes involved in cell cycle arrest, apoptosis and DNA repair. However, it rapidly came into light that p53 regulates gene expression to control a wider range of biological processes allowing rapid cell adaptation to environmental context. Among them, those related to cancer have been extensively documented. In addition to its role as transcription factor, scattered studies reported that p53 regulates miRNA processing, modulates protein activity by direct interaction or exhibits RNA-binding activity, thus suggesting a role of p53 in regulating several layers of gene expression not restricted to transcription. After 40 years of research, it appears more and more clearly that p53 is strongly implicated in translational regulation as well as in the control of the production and activity of the translational machinery. Translation control of specific mRNAs could provide yet unsuspected capabilities to this well-known guardian of the genome.
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Affiliation(s)
- Virginie Marcel
- Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France.
| | - Flora Nguyen Van Long
- Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France.
| | - Jean-Jacques Diaz
- Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69008 Lyon, France.
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