ArticleDevelopmental dynamics : an official publication of the American Association of Anatomists2023
Fgf, Hh, and pax2a differentially regulate expression of pax5 and pou3f3b in vestibular and auditory maculae in the zebrafish otic vesicle.
Article in Developmental dynamics : an official publication of the American Association of Anatomists, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 5 citations in OpenAlex.
- Rapgef1 paralog-mediated regulation of Wnt/β-catenin signaling orchestrates early embryo tissue patterning and morphogenesis.Cell communication and signaling : CCS · 2026Article
- Zebrafish pou3f3b controls saccular/auditory development and marks non-neuronal cells that delaminate from the otic vesicle to promote neuroblast maturation.Developmental biology · 2026Article
- Dis3l2 is essential for neural crest survival by modulating Akt signaling.Cell communication and signaling : CCS · 2025Article
- Pax2a, Pax5 and Cdh1-β-catenin, but not Wnt, protect sensory hair cells from destabilizing effects of fgf signaling on cell adhesion.Developmental biology · 2025Article
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4 authors at 1 institution in 1 country.
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Abstract
backgroundThe vertebrate inner ear contains distinct sensory epithelia specialized for auditory or vestibular function. In zebrafish, the first sensory epithelia form at opposite ends of the otic vesicle and are functionally distinct: the anterior utricular macula is essential for vestibular function whereas the posterior saccular macula is critical for hearing. Mechanisms distinguishing these maculae are not clear. Here, we examined the effects of manipulating Fgf or Hh on expression of pax5 and pou3f3b, unique markers of utricular and saccular identity. We also examined the roles of pax2a and atoh1a/b, early regulators of sensory specification.
resultsfgf3 and fgf8a were uniquely required for pax5 and pou3f3b, respectively. Elevating Fgf or blocking Hh expanded expression of pax5 but repressed pou3f3b, while blocking Fgf had the opposite effect. Blocking sensory specification did not affect pax5 or pou3f3b, but both markers were lost in pax2a-/- mutants. Maintenance of pax2a expression requires Fgf, Hh and Pax2a itself.
conclusionSpecification of utricular identity requires high Fgf and is repressed by Hh, whereas saccular identity requires Hh plus low Fgf. pax2a acts downstream of Fgf and Hh to maintain both fates. Comparison with mouse suggests this may reflect a broadly conserved developmental mechanism.
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