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RNA uridyl transferases TUT4/7 differentially regulate miRNA variants depending on the cancer cell type.
Medhi, Ragini; Price, Jonathan; Furlan, Giulia; Gorges, Beronia; Sapetschnig, Alexandra; Miska, Eric A.
Afiliación
  • Medhi R; Department of Genetics, University of Cambridge, Cambridge CB2 3EH, United Kingdom.
  • Price J; Wellcome Trust Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, United Kingdom.
  • Furlan G; Wellcome Trust Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, United Kingdom.
  • Gorges B; Wellcome Trust Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, United Kingdom.
  • Sapetschnig A; STORM Therapeutics Limited, Moneta Building, Babraham Research Campus, Cambridge CB22 3AT, United Kingdom.
  • Miska EA; STORM Therapeutics Limited, Moneta Building, Babraham Research Campus, Cambridge CB22 3AT, United Kingdom.
RNA ; 28(3): 353-370, 2022 03.
Article en En | MEDLINE | ID: mdl-34949722
The human terminal uridyl transferases TUT4 and TUT7 (TUT4/7) catalyze the additions of uridines at the 3' end of RNAs, including the precursors of the tumor suppressor miRNA let-7 upon recruitment by the oncoprotein LIN28A. As a consequence, let-7 family miRNAs are down-regulated. Disruption of this TUT4/7 activity inhibits tumorigenesis. Hence, targeting TUT4/7 could be a potential anticancer therapy. In this study, we investigate TUT4/7-mediated RNA regulation in two cancer cell lines by establishing catalytic knockout models. Upon TUT4/7 mutation, we observe a significant reduction in miRNA uridylation, which results in defects in cancer cell properties such as cell proliferation and migration. With the loss of TUT4/7-mediated miRNA uridylation, the uridylated miRNA variants are replaced by adenylated isomiRs. Changes in miRNA modification profiles are accompanied by deregulation of expression levels in specific cases. Unlike let-7s, most miRNAs do not depend on LIN28A for TUT4/7-mediated regulation. Additionally, we identify TUT4/7-regulated cell-type-specific miRNA clusters and deregulation in their corresponding mRNA targets. Expression levels of miR-200c-3p and miR-141-3p are regulated by TUT4/7 in a cancer cell-type-specific manner. Subsequently, BCL2, which is a well-established target of miR-200c is up-regulated. Therefore, TUT4/7 loss causes deregulation of miRNA-mRNA networks in a cell-type-specific manner. Understanding of the underlying biology of such cell-type-specific deregulation will be an important aspect of targeting TUT4/7 for potential cancer therapies.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: ARN Nucleotidiltransferasas / Regulación Neoplásica de la Expresión Génica / MicroARNs / Proteínas de Unión al ADN / Neoplasias Límite: Humans Idioma: En Revista: RNA Asunto de la revista: BIOLOGIA MOLECULAR Año: 2022 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: ARN Nucleotidiltransferasas / Regulación Neoplásica de la Expresión Génica / MicroARNs / Proteínas de Unión al ADN / Neoplasias Límite: Humans Idioma: En Revista: RNA Asunto de la revista: BIOLOGIA MOLECULAR Año: 2022 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos