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Tav C, Fournier É, Fournier M, Khadangi F, Baguette A, Côté MC, Silveira MAD, Bérubé-Simard FA, Bourque G, Droit A, Bilodeau S. Glucocorticoid stimulation induces regionalized gene responses within topologically associating domains. Front Genet 2023; 14:1237092. [PMID: 37576549 PMCID: PMC10413275 DOI: 10.3389/fgene.2023.1237092] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 07/07/2023] [Indexed: 08/15/2023] Open
Abstract
Transcription-factor binding to cis-regulatory regions regulates the gene expression program of a cell, but occupancy is often a poor predictor of the gene response. Here, we show that glucocorticoid stimulation led to the reorganization of transcriptional coregulators MED1 and BRD4 within topologically associating domains (TADs), resulting in active or repressive gene environments. Indeed, we observed a bias toward the activation or repression of a TAD when their activities were defined by the number of regions gaining and losing MED1 and BRD4 following dexamethasone (Dex) stimulation. Variations in Dex-responsive genes at the RNA levels were consistent with the redistribution of MED1 and BRD4 at the associated cis-regulatory regions. Interestingly, Dex-responsive genes without the differential recruitment of MED1 and BRD4 or binding by the glucocorticoid receptor were found within TADs, which gained or lost MED1 and BRD4, suggesting a role of the surrounding environment in gene regulation. However, the amplitude of the response of Dex-regulated genes was higher when the differential recruitment of the glucocorticoid receptor and transcriptional coregulators was observed, reaffirming the role of transcription factor-driven gene regulation and attributing a lesser role to the TAD environment. These results support a model where a signal-induced transcription factor induces a regionalized effect throughout the TAD, redefining the notion of direct and indirect effects of transcription factors on target genes.
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Affiliation(s)
- Christophe Tav
- Centre de Recherche du CHU de Québec—Université Laval, Axe Oncologie, Québec, QC, Canada
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
- Centre de Recherche en Données Massives de l’Université Laval, Québec, QC, Canada
| | - Éric Fournier
- Centre de Recherche du CHU de Québec—Université Laval, Axe Oncologie, Québec, QC, Canada
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
- Centre de Recherche en Données Massives de l’Université Laval, Québec, QC, Canada
| | - Michèle Fournier
- Centre de Recherche du CHU de Québec—Université Laval, Axe Oncologie, Québec, QC, Canada
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
| | - Fatemeh Khadangi
- Centre de Recherche du CHU de Québec—Université Laval, Axe Oncologie, Québec, QC, Canada
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
| | - Audrey Baguette
- Department of Human Genetics, Faculty of Medicine, McGill University, Montréal, QC, Canada
| | - Maxime C. Côté
- Centre de Recherche du CHU de Québec—Université Laval, Axe Oncologie, Québec, QC, Canada
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
| | - Maruhen A. D. Silveira
- Centre de Recherche du CHU de Québec—Université Laval, Axe Oncologie, Québec, QC, Canada
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
| | - Félix-Antoine Bérubé-Simard
- Centre de Recherche du CHU de Québec—Université Laval, Axe Oncologie, Québec, QC, Canada
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
| | - Guillaume Bourque
- Department of Human Genetics, Faculty of Medicine, McGill University, Montréal, QC, Canada
- Canadian Center for Computational Genomics, McGill University, Montréal, QC, Canada
| | - Arnaud Droit
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
- Centre de Recherche en Données Massives de l’Université Laval, Québec, QC, Canada
- Centre de Recherche du CHU de Québec—Université Laval, Axe Endocrinologie et Néphrologie, Québec, QC, Canada
- Département de Médecine Moléculaire, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - Steve Bilodeau
- Centre de Recherche du CHU de Québec—Université Laval, Axe Oncologie, Québec, QC, Canada
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, QC, Canada
- Centre de Recherche en Données Massives de l’Université Laval, Québec, QC, Canada
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Québec, QC, Canada
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Silveira MA, Tav C, Bérube-Simard FA, Cuppens T, Leclercq M, Fournier É, Côté MC, Droit A, Bilodeau S. Modulating HSF1 levels impacts expression of the estrogen receptor α and antiestrogen response. Life Sci Alliance 2021; 4:4/5/e202000811. [PMID: 33593922 PMCID: PMC7893817 DOI: 10.26508/lsa.202000811] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 12/21/2022] Open
Abstract
This work shows that activation of the main cellular stress response pathway is responsible for antiestrogen resistance in breast cancer, a process that is reversible. Master transcription factors control the transcriptional program and are essential to maintain cellular functions. Among them, steroid nuclear receptors, such as the estrogen receptor α (ERα), are central to the etiology of hormone-dependent cancers which are accordingly treated with corresponding endocrine therapies. However, resistance invariably arises. Here, we show that high levels of the stress response master regulator, the heat shock factor 1 (HSF1), are associated with antiestrogen resistance in breast cancer cells. Indeed, overexpression of HSF1 leads to ERα degradation, decreased expression of ERα-activated genes, and antiestrogen resistance. Furthermore, we demonstrate that reducing HSF1 levels reinstates expression of the ERα and restores response to antiestrogens. Last, our results establish a proof of concept that inhibition of HSF1, in combination with antiestrogens, is a valid strategy to tackle resistant breast cancers. Taken together, we are proposing a mechanism where high HSF1 levels interfere with the ERα-dependent transcriptional program leading to endocrine resistance in breast cancer.
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Affiliation(s)
- Maruhen Ad Silveira
- Centre de Recherche du CHU de Québec - Université Laval, Axe Oncologie, Québec, Canada.,Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada
| | - Christophe Tav
- Centre de Recherche du CHU de Québec - Université Laval, Axe Oncologie, Québec, Canada.,Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada.,Centre de Recherche du CHU de Québec - Université Laval, Axe Endocrinologie et Néphrologie, Québec, Canada.,Centre de Recherche en Données Massives de l'Université Laval, Québec, Canada
| | - Félix-Antoine Bérube-Simard
- Centre de Recherche du CHU de Québec - Université Laval, Axe Oncologie, Québec, Canada.,Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada
| | - Tania Cuppens
- Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada.,Centre de Recherche du CHU de Québec - Université Laval, Axe Endocrinologie et Néphrologie, Québec, Canada.,Centre de Recherche en Données Massives de l'Université Laval, Québec, Canada
| | - Mickaël Leclercq
- Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada.,Centre de Recherche du CHU de Québec - Université Laval, Axe Endocrinologie et Néphrologie, Québec, Canada.,Centre de Recherche en Données Massives de l'Université Laval, Québec, Canada
| | - Éric Fournier
- Centre de Recherche du CHU de Québec - Université Laval, Axe Oncologie, Québec, Canada.,Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada.,Centre de Recherche du CHU de Québec - Université Laval, Axe Endocrinologie et Néphrologie, Québec, Canada
| | - Maxime C Côté
- Centre de Recherche du CHU de Québec - Université Laval, Axe Oncologie, Québec, Canada.,Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada
| | - Arnaud Droit
- Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada.,Centre de Recherche du CHU de Québec - Université Laval, Axe Endocrinologie et Néphrologie, Québec, Canada.,Centre de Recherche en Données Massives de l'Université Laval, Québec, Canada.,Département de Médecine Moléculaire, Faculté de Médecine, Université Laval, Québec, Canada
| | - Steve Bilodeau
- Centre de Recherche du CHU de Québec - Université Laval, Axe Oncologie, Québec, Canada .,Centre de Recherche sur le Cancer de l'Université Laval, Québec, Canada.,Centre de Recherche en Données Massives de l'Université Laval, Québec, Canada.,Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Québec, Canada
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Fournier M, Bourriquen G, Lamaze FC, Côté MC, Fournier É, Joly-Beauparlant C, Caron V, Gobeil S, Droit A, Bilodeau S. FOXA and master transcription factors recruit Mediator and Cohesin to the core transcriptional regulatory circuitry of cancer cells. Sci Rep 2016; 6:34962. [PMID: 27739523 PMCID: PMC5064413 DOI: 10.1038/srep34962] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 09/20/2016] [Indexed: 01/07/2023] Open
Abstract
Controlling the transcriptional program is essential to maintain the identity and the biological functions of a cell. The Mediator and Cohesin complexes have been established as central cofactors controlling the transcriptional program in normal cells. However, the distribution, recruitment and importance of these complexes in cancer cells have not been fully investigated. Here we show that FOXA and master transcription factors are part of the core transcriptional regulatory circuitry of cancer cells and are essential to recruit M ediator and Cohesin. Indeed, Mediator and Cohesin occupied the enhancer and promoter regions of actively transcribed genes and maintained the proliferation and colony forming potential. Through integration of publically available ChIP-Seq datasets, we predicted the core transcriptional regulatory circuitry of each cancer cell. Unexpectedly, for all cells investigated, the pioneer transcription factors FOXA1 and/or FOXA2 were identified in addition to cell-specific master transcription factors. Loss of both types of transcription factors phenocopied the loss of Mediator and Cohesin. Lastly, the master and pioneer transcription factors were essential to recruit Mediator and Cohesin to regulatory regions of actively transcribed genes. Our study proposes that maintenance of the cancer cell state is dependent on recruitment of Mediator and Cohesin through FOXA and master transcription factors.
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Affiliation(s)
- Michèle Fournier
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, Canada
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
| | - Gaëlle Bourriquen
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, Canada
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
| | - Fabien C. Lamaze
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, Canada
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
| | - Maxime C. Côté
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, Canada
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
| | - Éric Fournier
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, Canada
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
| | | | - Vicky Caron
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, Canada
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
| | - Stéphane Gobeil
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
- Département de médecine moléculaire, Faculté de Médecine, Université Laval, Québec, Canada
| | - Arnaud Droit
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
- Département de médecine moléculaire, Faculté de Médecine, Université Laval, Québec, Canada
| | - Steve Bilodeau
- Centre de Recherche sur le Cancer de l’Université Laval, Québec, Canada
- Centre de recherche du CHU de Québec – Université Laval, Québec, Canada
- Département de biologie moléculaire, biochimie médicale et pathologie, Faculté de Médecine, Université Laval, Québec, Canada
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Côté MC, Lavoie JR, Houle F, Poirier A, Rousseau S, Huot J. Regulation of vascular endothelial growth factor-induced endothelial cell migration by LIM kinase 1-mediated phosphorylation of annexin 1. J Biol Chem 2010; 285:8013-21. [PMID: 20061392 DOI: 10.1074/jbc.m109.098665] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In this study, we obtained evidence indicating that annexin 1 is a new target of the p38/MAPKAP kinase-2 pathway and that it regulates endothelial cell migration in response to vascular endothelial growth factor (VEGF). These conclusions are supported by a series of substantiating experiments. First, by two-dimensional gel electrophoresis and mass spectrometry, we identified annexin 1 as a protein whose phosphorylation is induced by VEGF and is impaired by inhibiting p38. Second, using in vitro kinase assays and in vivo phosphorylation assays, we found that VEGF-mediated activation of LIM kinase 1 downstream of the p38 pathway triggers the phosphorylation of annexin 1. Third, VEGF-induced cell migration and tube formation in Matrigel are inhibited following small interfering RNA-mediated knockdown of annexin 1. Fourth, both processes are rescued in cells expressing an annexin 1 construct insensitive to the small interfering RNA knockdown. Finally, the VEGF/annexin 1-mediated cell migration is impaired by inhibiting p38. We therefore conclude that phosphorylation of annexin 1 regulates the angiogenic effect that is associated with the activation of the p38/LIM kinase 1 axis by VEGF.
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Affiliation(s)
- Maxime C Côté
- Cancer Research Center, Laval University, Québec G1R-2J6, Canada
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Bleau AM, Fradette C, El-Kadi AO, Côté MC, du Souich P. Cytochrome P450 down-regulation by serum from humans with a viral infection and from rabbits with an inflammatory reaction. Drug Metab Dispos 2001; 29:1007-12. [PMID: 11408367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023] Open
Abstract
Serum from humans with an upper respiratory viral infection (HS(URVI)) and from rabbits with a turpentine-induced acute inflammatory reaction (RS(TIAR)) reduces the activity of hepatic cytochrome P450 (P450) following 4 h of incubation. The aim of the present study was to assess the effect of HS(URVI) and RS(TIAR) on P450 activity and expression following 24 h of incubation with hepatocytes from control (H(CONT)) and rabbits with a TIAR (H(INFLA)). RS(TIAR) incubated with H(CONT) for 24 h reduced P450 content and activity, and CYP3A6 by 45%, without changing CYP1A1 and 1A2; when incubated with H(INFLA), RS(TIAR) decreased P450 content and activity without affecting CYP1A1 or 1A2. HS(URVI) incubated for 4 h with H(CONT) decreased P450 activity without affecting the amounts of CYP1A1, 1A2, or 3A6, although when incubated for 24 h, P450 activity and CYP3A6 amount decreased. HS(URVI) incubated with H(INFLA) for 4 h reduced P450 content and activity, and incubated for 24 h reduced activity, P450 content, and amount of CYP1A1 and 1A2 proteins. The present study demonstrates that 1) the effect of RS(TIAR) and HS(URVI) depends upon the susceptibility of the hepatocyte, i.e., H(CONT) or primed H(INFLA); 2) P450 down-regulation is preceded by a decrease in P450 activity; 3) the nature of the inflammatory reaction determines the repercussions on P450 activity and expression; and 4) CYP3A6 is more vulnerable than CYP1A1 and 1A2 to the down-regulation provoked by an inflammatory challenge.
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Affiliation(s)
- A M Bleau
- Department of Pharmacology, Faculty of Medicine, University of Montréal, Montréal, Québec, Canada
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