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Regulation of Human PAX6 Expression by miR-7.


ABSTRACT: The paired box gene 6 (PAX6) is a powerful mediator of eye and brain organogenesis whose spatiotemporal expression is exquisitely controlled by multiple mechanisms, including post-transcriptional regulation by microRNAs (miRNAs). In the present study, we use bioinformatic predictions to identify three candidate microRNA-7 (miR-7) target sites in the human PAX6 3' untranslated region (3'-UTR) and demonstrate that two of them are functionally active in a human cell line. Furthermore, transient transfection of cells with synthetic miR-7 inhibits PAX6 protein expression but does not alter levels of PAX6 mRNA, suggesting that miR-7 induces translational repression of PAX6. Finally, a comparison of PAX6 3'-UTRs across species reveals that one of the functional miR-7 target sites is conserved, whereas the second functional target site is found only in primates. Thus, the interaction between PAX6 and miR-7 appears to be highly conserved; however, the precise number of sites through which this interaction occurs may have expanded throughout evolution.

SUBMITTER: Needhamsen M 

PROVIDER: S-EPMC4116382 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Regulation of Human PAX6 Expression by miR-7.

Needhamsen Maria M   White Robert B RB   Giles Keith M KM   Dunlop Sarah A SA   Thomas Meghan G MG  

Evolutionary bioinformatics online 20140714


The paired box gene 6 (PAX6) is a powerful mediator of eye and brain organogenesis whose spatiotemporal expression is exquisitely controlled by multiple mechanisms, including post-transcriptional regulation by microRNAs (miRNAs). In the present study, we use bioinformatic predictions to identify three candidate microRNA-7 (miR-7) target sites in the human PAX6 3' untranslated region (3'-UTR) and demonstrate that two of them are functionally active in a human cell line. Furthermore, transient tra  ...[more]

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