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Scratch2 modulates neurogenesis and cell migration through antagonism of bHLH proteins in the developing neocortex.

Identifieur interne : 000098 ( Main/Exploration ); précédent : 000097; suivant : 000099

Scratch2 modulates neurogenesis and cell migration through antagonism of bHLH proteins in the developing neocortex.

Auteurs : Vanessa Paul [Allemagne] ; Anton B. Tonchev ; Kristine A. Henningfeld ; Evangelos Pavlakis ; Barbara Rust ; Tomas Pieler ; Anastassia Stoykova

Source :

RBID : pubmed:23180754

Descripteurs français

English descriptors

Abstract

Scratch genes (Scrt) are neural-specific zinc-finger transcription factors (TFs) with an unknown function in the developing brain. Here, we show that, in addition to the reported expression of mammalian Scrt2 in postmitotic differentiating and mature neurons in the developing and early postnatal brain, Scrt2 is also localized in subsets of mitotic and neurogenic radial glial (RGP) and intermediate (IP) progenitors, as well as in their descendants-postmitotic IPs and differentiating neurons at the border subventricular/intermediate zone. Conditional activation of transgenic Scrt2 in cortical progenitors in mice promotes neuronal differentiation by favoring the direct mode of neurogenesis of RGPs at the onset of neurogenesis, at the expense of IP generation. Neuronal amplification via indirect IP neurogenesis is thereby extenuated, leading to a mild postnatal reduction of cortical thickness. Forced in vivo overexpression of Scrt2 suppressed the generation of IPs from RGPs and caused a delay in the radial migration of upper layer neurons toward the cortical plate. Mechanistically, our results indicate that Scrt2 negatively regulates the transcriptional activation of the basic helix loop helix TFs Ngn2/NeuroD1 on E-box containing common target genes, including Rnd2, a well-known major effector for migrational defects in developing cortex. Altogether, these findings reveal a modulatory role of Scrt2 protein in cortical neurogenesis and neuronal migration.

DOI: 10.1093/cercor/bhs356
PubMed: 23180754


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">Scratch genes (Scrt) are neural-specific zinc-finger transcription factors (TFs) with an unknown function in the developing brain. Here, we show that, in addition to the reported expression of mammalian Scrt2 in postmitotic differentiating and mature neurons in the developing and early postnatal brain, Scrt2 is also localized in subsets of mitotic and neurogenic radial glial (RGP) and intermediate (IP) progenitors, as well as in their descendants-postmitotic IPs and differentiating neurons at the border subventricular/intermediate zone. Conditional activation of transgenic Scrt2 in cortical progenitors in mice promotes neuronal differentiation by favoring the direct mode of neurogenesis of RGPs at the onset of neurogenesis, at the expense of IP generation. Neuronal amplification via indirect IP neurogenesis is thereby extenuated, leading to a mild postnatal reduction of cortical thickness. Forced in vivo overexpression of Scrt2 suppressed the generation of IPs from RGPs and caused a delay in the radial migration of upper layer neurons toward the cortical plate. Mechanistically, our results indicate that Scrt2 negatively regulates the transcriptional activation of the basic helix loop helix TFs Ngn2/NeuroD1 on E-box containing common target genes, including Rnd2, a well-known major effector for migrational defects in developing cortex. Altogether, these findings reveal a modulatory role of Scrt2 protein in cortical neurogenesis and neuronal migration. </div>
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<name sortKey="Pieler, Tomas" sort="Pieler, Tomas" uniqKey="Pieler T" first="Tomas" last="Pieler">Tomas Pieler</name>
<name sortKey="Rust, Barbara" sort="Rust, Barbara" uniqKey="Rust B" first="Barbara" last="Rust">Barbara Rust</name>
<name sortKey="Stoykova, Anastassia" sort="Stoykova, Anastassia" uniqKey="Stoykova A" first="Anastassia" last="Stoykova">Anastassia Stoykova</name>
<name sortKey="Tonchev, Anton B" sort="Tonchev, Anton B" uniqKey="Tonchev A" first="Anton B" last="Tonchev">Anton B. Tonchev</name>
</noCountry>
<country name="Allemagne">
<region name="Basse-Saxe">
<name sortKey="Paul, Vanessa" sort="Paul, Vanessa" uniqKey="Paul V" first="Vanessa" last="Paul">Vanessa Paul</name>
</region>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Bois/explor/RustEffectorV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000098 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000098 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Bois
   |area=    RustEffectorV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:23180754
   |texte=   Scratch2 modulates neurogenesis and cell migration through antagonism of bHLH proteins in the developing neocortex.
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:23180754" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a RustEffectorV1 

Wicri

This area was generated with Dilib version V0.6.37.
Data generation: Tue Nov 10 15:52:57 2020. Site generation: Tue Nov 10 15:53:28 2020