MicroRNA-34a activation in tuberous sclerosis complex during early brain development may lead to impaired corticogenesis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00064203%3A_____%2F21%3A10427358" target="_blank" >RIV/00064203:_____/21:10427358 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11130/21:10427358

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=fr16ZtgVTv" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=fr16ZtgVTv</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/nan.12717" target="_blank" >10.1111/nan.12717</a>

Jazyk výsledku

angličtina

Název v původním jazyce

MicroRNA-34a activation in tuberous sclerosis complex during early brain development may lead to impaired corticogenesis

Popis výsledku v původním jazyce

AIMS: Tuberous sclerosis complex (TSC) is a genetic disorder associated with dysregulation of the mechanistic target of rapamycin complex 1 (mTORC1) signalling pathway. Neurodevelopmental disorders, frequently present in TSC, are linked to cortical tubers in the brain. We previously reported microRNA-34a (miR-34a) among the most up-regulated miRs in tubers. Here, we characterized miR-34a expression in tubers with the focus on the early brain development and assessed the regulation of mTORC1 pathway and corticogenesis by miR-34a. METHODS: We analysed the expression of miR-34a in resected cortical tubers (n = 37) compared to autopsy-derived control tissue (n = 27). The effect of miR-34a overexpression on corticogenesis was assessed in mice at E18. The regulation of the mTORC1 pathway and the expression of the bioinformatically predicted target genes were assessed in primary astrocyte cultures from 3 patients with TSC and in SH-SY5Y cells following miR-34a transfection. RESULTS: The peak of miR-34a overexpression in tubers was observed during infancy, concomitant with the presence of pathological markers, particularly in giant cells and dysmorphic neurons. MiR-34a was also strongly expressed in fetal TSC cortex. Overexpression of miR-34a in mouse embryos decreased the percentage of cells migrated to the cortical plate. The transfection of miR-34a mimic in TSC astrocytes negatively regulated mTORC1 and decreased the expression of the target genes RAS related (RRAS) and NOTCH1. CONCLUSIONS: MiR-34a is most highly overexpressed in tubers during fetal and early postnatal brain development. MiR-34a can negatively regulate mTORC1, however, it may also contribute to abnormal corticogenesis in TSC.

Název v anglickém jazyce

MicroRNA-34a activation in tuberous sclerosis complex during early brain development may lead to impaired corticogenesis

Popis výsledku anglicky

AIMS: Tuberous sclerosis complex (TSC) is a genetic disorder associated with dysregulation of the mechanistic target of rapamycin complex 1 (mTORC1) signalling pathway. Neurodevelopmental disorders, frequently present in TSC, are linked to cortical tubers in the brain. We previously reported microRNA-34a (miR-34a) among the most up-regulated miRs in tubers. Here, we characterized miR-34a expression in tubers with the focus on the early brain development and assessed the regulation of mTORC1 pathway and corticogenesis by miR-34a. METHODS: We analysed the expression of miR-34a in resected cortical tubers (n = 37) compared to autopsy-derived control tissue (n = 27). The effect of miR-34a overexpression on corticogenesis was assessed in mice at E18. The regulation of the mTORC1 pathway and the expression of the bioinformatically predicted target genes were assessed in primary astrocyte cultures from 3 patients with TSC and in SH-SY5Y cells following miR-34a transfection. RESULTS: The peak of miR-34a overexpression in tubers was observed during infancy, concomitant with the presence of pathological markers, particularly in giant cells and dysmorphic neurons. MiR-34a was also strongly expressed in fetal TSC cortex. Overexpression of miR-34a in mouse embryos decreased the percentage of cells migrated to the cortical plate. The transfection of miR-34a mimic in TSC astrocytes negatively regulated mTORC1 and decreased the expression of the target genes RAS related (RRAS) and NOTCH1. CONCLUSIONS: MiR-34a is most highly overexpressed in tubers during fetal and early postnatal brain development. MiR-34a can negatively regulate mTORC1, however, it may also contribute to abnormal corticogenesis in TSC.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30103 - Neurosciences (including psychophysiology)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Neuropathology and Applied Neurobiology

ISSN

0305-1846

e-ISSN

—

Svazek periodika

47

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

796-811

Kód UT WoS článku

000661128000001

EID výsledku v databázi Scopus

2-s2.0-85107727171