MicroRNA-9a Ensures the Precise Specification of Sensory Organ Precursors in Drosophila

Overview

Journal Genes Dev

Specialty Molecular Biology

Date 2006 Oct 4

PMID 17015424

Citations 158

Authors

Yan Li

Fay Wang

Jin-A Lee

Fen-Biao Gao

Affiliations

Soon will be listed here.

Abstract

MicroRNAs (miRNAs) have been implicated in regulating various aspects of animal development, but their functions in neurogenesis are largely unknown. Here we report that loss of miR-9a function in the Drosophila peripheral nervous system leads to ectopic production of sensory organ precursors (SOPs), whereas overexpression of miR-9a results in a severe loss of SOPs. We further demonstrate a strong genetic interaction between miR-9a and senseless (sens) in controlling the formation of SOPs in the adult wing imaginal disc. Moreover, miR-9a suppresses Sens expression through its 3' untranslated region. miR-9a is expressed in epithelial cells, including those adjacent to SOPs within proneural clusters, suggesting that miR-9a normally inhibits neuronal fate in non-SOP cells by down-regulating Sens expression. These results indicate that miR-9a ensures the generation of the precise number of neuronal precursor cells during development.

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