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Pecharromán I, Solé L, Álvarez‐Villanueva D, Lobo‐Jarne T, Alonso‐Marañón J, Bertran J, Guillén Y, Montoto Á, Martínez‐Iniesta M, García‐Hernández V, Giménez G, Salazar R, Santos C, Garrido M, Borràs E, Sabidó E, Bonfill‐Teixidor E, Iurlaro R, Seoane J, Villanueva A, Iglesias M, Bigas A, Espinosa L. IκB kinase-α coordinates BRD4 and JAK/STAT signaling to subvert DNA damage-based anticancer therapy. EMBO J 2023; 42:e114719. [PMID: 37737566 PMCID: PMC10620764 DOI: 10.15252/embj.2023114719] [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: 06/10/2023] [Revised: 07/28/2023] [Accepted: 08/28/2023] [Indexed: 09/23/2023] Open
Abstract
Activation of the IκB kinase (IKK) complex has recurrently been linked to colorectal cancer (CRC) initiation and progression. However, identification of downstream effectors other than NF-κB has remained elusive. Here, analysis of IKK-dependent substrates in CRC cells after UV treatment revealed that phosphorylation of BRD4 by IKK-α is required for its chromatin-binding at target genes upon DNA damage. Moreover, IKK-α induces the NF-κB-dependent transcription of the cytokine LIF, leading to STAT3 activation, association with BRD4 and recruitment to specific target genes. IKK-α abrogation results in defective BRD4 and STAT3 functions and consequently irreparable DNA damage and apoptotic cell death upon different stimuli. Simultaneous inhibition of BRAF-dependent IKK-α activity, BRD4, and the JAK/STAT pathway enhanced the therapeutic potential of 5-fluorouracil combined with irinotecan in CRC cells and is curative in a chemotherapy-resistant xenograft model. Finally, coordinated expression of LIF and IKK-α is a poor prognosis marker for CRC patients. Our data uncover a functional link between IKK-α, BRD4, and JAK/STAT signaling with clinical relevance.
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Affiliation(s)
- Irene Pecharromán
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - Laura Solé
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - Daniel Álvarez‐Villanueva
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
- Chemoresistance and Predictive Factors Group, Program Against Cancer Therapeutic Resistance (ProCURE), Catalan Institute of Oncology (ICO), Oncobell Program, Bellvitge Biomedical Research Institute (IDIBELL)L'Hospitalet del LlobregatBarcelonaSpain
| | - Teresa Lobo‐Jarne
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - Josune Alonso‐Marañón
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - Joan Bertran
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
- Faculty of Science and TechnologyUniversity of Vic – Central University of CataloniaVicSpain
| | - Yolanda Guillén
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - Ángela Montoto
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - María Martínez‐Iniesta
- Chemoresistance and Predictive Factors Group, Program Against Cancer Therapeutic Resistance (ProCURE), Catalan Institute of Oncology (ICO), Oncobell Program, Bellvitge Biomedical Research Institute (IDIBELL)L'Hospitalet del LlobregatBarcelonaSpain
| | - Violeta García‐Hernández
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - Gemma Giménez
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - Ramon Salazar
- Department of Medical Oncology, Catalan Institute of Oncology (ICO), Oncobell Program, Bellvitge Biomedical Research Institute (IDIBELL)‐CIBERONCL'Hospitalet de LlobregatBarcelonaSpain
| | - Cristina Santos
- Department of Medical Oncology, Catalan Institute of Oncology (ICO), Oncobell Program, Bellvitge Biomedical Research Institute (IDIBELL)‐CIBERONCL'Hospitalet de LlobregatBarcelonaSpain
| | - Marta Garrido
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
| | - Eva Borràs
- Proteomics Unit, Centre for Genomic Regulation (CRG)Barcelona Institute of Science and Technology (BIST)BarcelonaSpain
- Proteomics UnitUniversitat Pompeu FabraBarcelonaSpain
| | - Eduard Sabidó
- Proteomics Unit, Centre for Genomic Regulation (CRG)Barcelona Institute of Science and Technology (BIST)BarcelonaSpain
- Proteomics UnitUniversitat Pompeu FabraBarcelonaSpain
| | - Ester Bonfill‐Teixidor
- Vall d'Hebron Institute of Oncology (VHIO), CIBERONCVall d'Hebron University Hospital, Universitat Autònoma de BarcelonaBarcelonaSpain
| | - Raffaella Iurlaro
- Vall d'Hebron Institute of Oncology (VHIO), CIBERONCVall d'Hebron University Hospital, Universitat Autònoma de BarcelonaBarcelonaSpain
| | - Joan Seoane
- Vall d'Hebron Institute of Oncology (VHIO), CIBERONCVall d'Hebron University Hospital, Universitat Autònoma de BarcelonaBarcelonaSpain
- Institució Catalana de Recerca i Estudis Avançats (ICREA)BarcelonaSpain
| | - Alberto Villanueva
- Chemoresistance and Predictive Factors Group, Program Against Cancer Therapeutic Resistance (ProCURE), Catalan Institute of Oncology (ICO), Oncobell Program, Bellvitge Biomedical Research Institute (IDIBELL)L'Hospitalet del LlobregatBarcelonaSpain
- Xenopat S.L., Parc Cientific de Barcelona (PCB)BarcelonaSpain
| | - Mar Iglesias
- Department of Pathology, Institut Mar d'Investigacions Mèdiques, CIBERONCUniversitat Autònoma de BarcelonaBarcelonaSpain
| | - Anna Bigas
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
- Josep Carreras Leukemia Research InstituteBadalonaSpain
| | - Lluís Espinosa
- Cancer Research Program, Institut Mar d'Investigacions Mèdiques, CIBERONCHospital del MarBarcelonaSpain
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