1. ΔNp63α Silences a miRNA Program to Aberrantly Initiate a Wound-Healing Program That Promotes TGFβ-Induced Metastasis
- Author
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Debashish Sahay, Leif W. Ellisen, Thibaut Quillard, Marc Baud'huin, Fernando Lecanda, Francois Lamoureux, Franck Verrecchia, Lidia Rodriguez Calleja, Dominique Heymann, Marta Tellez Gabriel, Céline Charrier, Régis Brion, Camille Jacques, Pierre Perrot, Jérôme Amiaud, Benjamin Ory, Physiopathologie des Adaptations Nutritionnelles (PhAN), Institut National de la Recherche Agronomique (INRA)-Université de Nantes (UN), Equipe Labellisée LIGUE 2012 [Nantes], Physiopathologie, diagnostic et traitements des maladies osseuses / Pathophysiology, Diagnosis & Treatments of Bone Diseases (LYOS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre hospitalier universitaire de Nantes (CHU Nantes), Center for Applied Medical Research [Plamplona] (CIMA), Universidad de Navarra [Pamplona] (UNAV), Massachusetts General Hospital Cancer Center [Boston, MA, USA], Harvard Medical School [Boston] (HMS), C. Jacques was funded by INSERM and Region Pays de la loire, Philippe Hulin, Nantes University, PICell for time-lapsemicroscopy., European Project: 264817,EC:FP7:PEOPLE,FP7-PEOPLE-2010-ITN,BONE-NET(2011), maurice, sandrine, European Training Network on Cancer-Induced Bone Diseases - BONE-NET - - EC:FP7:PEOPLE2011-02-01 - 2015-01-31 - 264817 - VALID, Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), and Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
- Subjects
0301 basic medicine ,Cancer Research ,Lung Neoplasms ,Apoptosis ,Metastasis ,Immunoenzyme Techniques ,Transactivation ,Mice ,Cell Movement ,Transforming Growth Factor beta ,Tumor Cells, Cultured ,Protein Isoforms ,Regulation of gene expression ,[SDV.MHEP.RSOA] Life Sciences [q-bio]/Human health and pathology/Rhumatology and musculoskeletal system ,Osteosarcoma ,Reverse Transcriptase Polymerase Chain Reaction ,3. Good health ,Gene Expression Regulation, Neoplastic ,Oncology ,[SDV.MHEP.RSOA]Life Sciences [q-bio]/Human health and pathology/Rhumatology and musculoskeletal system ,Transcriptional Activation ,Blotting, Western ,[SDV.CAN]Life Sciences [q-bio]/Cancer ,Bone Neoplasms ,Biology ,Real-Time Polymerase Chain Reaction ,Article ,03 medical and health sciences ,[SDV.MHEP.PED] Life Sciences [q-bio]/Human health and pathology/Pediatrics ,Downregulation and upregulation ,[SDV.CAN] Life Sciences [q-bio]/Cancer ,microRNA ,medicine ,Animals ,Humans ,RNA, Messenger ,Psychological repression ,Cell Proliferation ,[SDV.MHEP.PED]Life Sciences [q-bio]/Human health and pathology/Pediatrics ,Wound Healing ,Tumor Suppressor Proteins ,Transforming growth factor beta ,medicine.disease ,Xenograft Model Antitumor Assays ,Transplantation ,MicroRNAs ,030104 developmental biology ,Immunology ,Cancer research ,biology.protein ,Gene Deletion ,Transcription Factors - Abstract
Primary cancer cell dissemination is a key event during the metastatic cascade, but context-specific determinants of this process remain largely undefined. Multiple reports have suggested that the p53 (TP53) family member p63 (TP63) plays an antimetastatic role through its minor epithelial isoform containing the N-terminal transactivation domain (TAp63). However, the role and contribution of the major p63 isoform lacking this domain, ΔNp63α, remain largely undefined. Here, we report a distinct and TAp63-independent mechanism by which ΔNp63α-expressing cells within a TGFβ-rich microenvironment become positively selected for metastatic dissemination. Orthotopic transplantation of ΔNp63α-expressing human osteosarcoma cells into athymic mice resulted in larger and more frequent lung metastases than transplantation of control cells. Mechanistic investigations revealed that ΔNp63α repressed miR-527 and miR-665, leading to the upregulation of two TGFβ effectors, SMAD4 and TβRII (TGFBR2). Furthermore, we provide evidence that this mechanism reflects a fundamental role for ΔNp63α in the normal wound-healing response. We show that ΔNp63α-mediated repression of miR-527/665 controls a TGFβ-dependent signaling node that switches off antimigratory miR-198 by suppressing the expression of the regulatory factor, KSRP (KHSRP). Collectively, these findings reveal that a novel miRNA network involved in the regulation of physiologic wound-healing responses is hijacked and suppressed by tumor cells to promote metastatic dissemination. Cancer Res; 76(11); 3236–51. ©2016 AACR.
- Published
- 2015