title: Regulation of huntingtin gene expression by miRNA-137, -214, -148a, and their respective isomiRs.
abstract: With the advent of deep sequencing technology, a variety of miRNA length and sequence variants, termed isomiRNAs (isomiRs), have been discovered. However, the functional roles of these commonly detected isomiRs remain unknown. In this paper, we demonstrated that miRNAs regulate the expression of the HTT gene, whose mutation leads to Huntington's disease (HD), a hereditary degenerative disorder. Specifically, we validated the interactions of canonical miRNAs, miR-137, miR-214, and miR-148a, with the HTT 3'UTR using a luciferase assay. Moreover, we applied synthetic miRNA mimics to examine whether a slight shifting of miRNA seed regions might alter the regulation of the HTT transcript. We also examined miR-137, miR-214, and miR-148a isomiRs and showed the activity of these isoforms on reporter constructs bearing appropriate sequences from the HTT 3'UTR. Hence, we demonstrated that certain 5'-end variants of miRNAs might be functional for the regulation of the same targets as canonical miRNAs.
authors: Department of Molecular Biomedicine, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14 Str., 61-704 Poznan, Poland. emiliak@ibch.poznan.pl
authors: Emilia
authors: E
authors: Kozlowska
authors: Wlodzimierz J
authors: WJ
authors: Krzyzosiak
authors: Edyta
authors: E
authors: Koscianska
mesh_terms: D001483:Base Sequence; D001665:Binding Sites; D015870:Gene Expression; D017930:Genes, Reporter; D057809:HEK293 Cells; D006801:Humans; D000071058:Huntingtin Protein; D006816:Huntington Disease / Q000235:genetics / Q000378:metabolism; D049410:Luciferases, Renilla / Q000096:biosynthesis / Q000235:genetics; D035683:MicroRNAs / Q000502:physiology*; D009419:Nerve Tissue Proteins / Q000235:genetics* / Q000378:metabolism; D034622:RNA Interference
chemical_list: C086055:HTT protein, human; D000071058:Huntingtin Protein; C545567:MIRN137 microRNA, human; C550570:MIRN148 microRNA, human; C547397:MIRN214 microRNA, human; D035683:MicroRNAs; D009419:Nerve Tissue Proteins; D049410:Luciferases, Renilla
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