Journal
ELIFE
Volume 6, Issue -, Pages -Publisher
ELIFE SCIENCES PUBLICATIONS LTD
DOI: 10.7554/eLife.29887
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Funding
- National Institutes of Health [R01-HD086175]
- Bill and Melinda Gates Foundation [OPP1160858]
- University of Connecticut
- Bill & Melinda Gates Foundation - Grand Challenges Explorations Initiative [OPP1160858] Funding Source: researchfish
- Bill and Melinda Gates Foundation [OPP1160858] Funding Source: Bill and Melinda Gates Foundation
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Follicle rupture, the final step in ovulation, utilizes conserved molecular mechanisms including matrix metalloproteinases (Mmps), steroid signaling, and adrenergic signaling. It is still unknown how follicles become competent for follicle rupture/ovulation. Here, we identify a zinc finger transcription factor Hindsight (Hnt) as the first transcription factor regulating follicle's competency for ovulation in Drosophila. Hnt is not expressed in immature stage-13 follicle cells but is upregulated in mature stage-14 follicle cells, which is essential for follicle rupture/ovulation. Hnt upregulates Mmp2 expression in posterior follicle cells (essential for the breakdown of the follicle wall) and Oamb expression in all follicle cells (the receptor for receiving adrenergic signaling and inducing Mmp2 activation). Hnt's role in regulating Mmp2 and Oamb can be replaced by its human homolog Ras-responsive element-binding protein 1 (RREB-1). Our data suggest that Hnt/RREB-1 plays conserved role in regulating follicle maturation and competency for ovulation.
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