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@ARTICLE{Marchetti:139548,
author = {Marchetti, Giovanni and Tavosanis, Gaia},
title = {{S}teroid {H}ormone {E}cdysone {S}ignaling {S}pecifies
{M}ushroom {B}ody {N}euron {S}equential {F}ate via
{C}hinmo.},
journal = {Current biology},
volume = {27},
number = {19},
issn = {0960-9822},
address = {London},
publisher = {Current Biology Ltd.},
reportid = {DZNE-2020-05870},
pages = {3017-3024.e4},
year = {2017},
abstract = {The functional variety in neuronal composition of an adult
brain is established during development. Recent studies
proposed that interactions between genetic intrinsic
programs and external cues are necessary to generate proper
neural diversity [1]. However, the molecular mechanisms
underlying this developmental process are still poorly
understood. Three main subtypes of Drosophila mushroom body
(MB) neurons are sequentially generated during development
and provide a good example of developmental neural
plasticity [2]. Our present data propose that the
environmentally controlled steroid hormone ecdysone
functions as a regulator of early-born MB neuron fate during
larval-pupal transition. We found that the BTB-zinc finger
factor Chinmo acts upstream of ecdysone signaling to promote
a neuronal fate switch. Indeed, Chinmo regulates the
expression of the ecdysone receptor B1 isoform to mediate
the production of γ and α'β' MB neurons. In addition, we
provide genetic evidence for a regulatory negative feedback
loop driving the α'β' to αβ MB neuron transition in
which ecdysone signaling in turn controls microRNA let-7
depression of Chinmo expression. Thus, our results uncover a
novel interaction in the MB neural specification pathway for
temporal control of neuronal identity by interplay between
an extrinsic hormonal signal and an intrinsic transcription
factor cascade.},
keywords = {Animals / Cell Differentiation / Drosophila Proteins:
genetics / Drosophila Proteins: metabolism / Drosophila
melanogaster: genetics / Drosophila melanogaster: growth
$\&$ development / Drosophila melanogaster: metabolism /
Ecdysone: metabolism / Gene Expression Regulation,
Developmental / Larva: genetics / Larva: growth $\&$
development / Larva: metabolism / Mushroom Bodies: growth
$\&$ development / Nerve Tissue Proteins: genetics / Nerve
Tissue Proteins: metabolism / Neurons: physiology / Pupa:
genetics / Pupa: growth $\&$ development / Pupa: metabolism
/ Receptors, Steroid: genetics / Receptors, Steroid:
metabolism / Signal Transduction / Chinmo protein,
Drosophila (NLM Chemicals) / Drosophila Proteins (NLM
Chemicals) / Nerve Tissue Proteins (NLM Chemicals) /
Receptors, Steroid (NLM Chemicals) / ecdysone receptor (NLM
Chemicals) / Ecdysone (NLM Chemicals)},
cin = {AG Tavosanis},
ddc = {570},
cid = {I:(DE-2719)1013018},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28966087},
doi = {10.1016/j.cub.2017.08.037},
url = {https://pub.dzne.de/record/139548},
}