In vivo birthdating by BAPTISM reveals that trigeminal sensory neuron diversity depends on early neurogenesis.

In vivo birthdating by BAPTISM reveals that trigeminal sensory neuron diversity depends on early neurogenesis.
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DOI:
10.1242/dev.023200
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发表时间:
2008-10
期刊:
影响因子:
4.6
通讯作者:
Schier, Alexander F.
Schier, Alexander F.
中科院分区:
生物学2区
文献类型:
--
作者:
Caron, Sophie J. C.;Prober, David;Choy, Margaret;Schier, Alexander F.

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Among sensory systems, the somatic sense is exceptional in its ability to detect a wide range of chemical, mechanical, and thermal stimuli. How this sensory diversity is established during development remains largely elusive. We devised a method (BAPTISM) that uses the photoconvertible fluorescent protein Kaede to simultaneously analyze birthdate and cell fate in live zebrafish embryos. We found that trigeminal sensory ganglia are formed from early-born and late-born neurons. Early-born neurons give rise to multiple classes of sensory neurons that express different ion channels. In contrast, late-born neurons are restricted in their fate and do not form chemosensory neurons expressing the ion channel TrpA1b. Accordingly, larvae lacking early-born neurons do not respond to the TrpA1b agonist allyl isothiocyanate. These results indicate that the multimodal specification and function of trigeminal sensory ganglia depends on the timing of neurogenesis.
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