[No authors listed]
The RNA decapping enzyme Dcp2 is a crucial enzyme involved in the process of RNA turnover, which can post-transcriptionally regulate gene expression. Dcp2 has been found to be highly expressed in embryonic, but not adult, kidneys. Here we showed that Dcp2 mRNA was expressed, but Dcp2 proteins were absent, in mouse kidneys after postnatal day 10 (P10). In kidneys of adult Dcp2-IRES-EGFP knock-in mice, Dcp2 was undetectable but EGFP was expressed, indicating that Dcp2 mRNA was not completely silenced in adult kidneys. Using luciferase reporter assays, we found that miR-141-3p/200a-3p directly targeted the of Dcp2 mRNA. Overexpression of miR-141-3p and miR-200a-3p downregulated endogenous Dcp2 protein expression. Furthermore, miR-141-3p and miR-200a-3p expression was low in embryonic kidneys but increased dramatically after P10 and was negatively correlated with Dcp2 protein expression during renal development. These results suggest miR-141-3p/200a-3p may be involved in post-transcriptional repression of Dcp2 expression during renal development. ABBREVIATIONS:IRES: internal ribosome entry site; EGFP: enhanced green fluorescent protein; UTR: untranslated region.
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