AEG-1 regulates TWIK-1 expression as an RNA-binding protein in astrocytes

Hyun Gug Jung; Ajung Kim; Seung Chan Kim; Jae Yong Park; Eun Mi Hwang

doi:10.3390/brainsci11010085

AEG-1 regulates TWIK-1 expression as an RNA-binding protein in astrocytes

Hyun Gug Jung, Ajung Kim, Seung Chan Kim, Jae Yong Park, Eun Mi Hwang

Research output: Contribution to journal › Article › peer-review

Abstract

AEG-1, also called MTDH, has oncogenic potential in numerous cancers and is considered a multifunctional modulator because of its involvement in developmental processes and inflammatory and degenerative brain diseases. However, the role of AEG-1 in astrocytes remains unknown. This study aimed to investigate proteins directly regulated by AEG-1 by analyzing their RNA expression patterns in astrocytes transfected with scramble shRNA and AEG-1 shRNA. AEG-1 knockdown down-regulated TWIK-1 mRNA. Real-time quantitative PCR (qPCR) and immunocytochemistry assays confirmed that AEG-1 modulates TWIK-1 mRNA and protein expression. Electrophysiological experiments further revealed that AEG-1 further regulates TWIK-1-mediated potassium currents in normal astrocytes. An RNA immunoprecipitation assay to determine how AEG-1 regulates the expression of TWIK-1 revealed that AEG-1 binds directly to TWIK-1 mRNA. Furthermore, TWIK-1 mRNA stability was significantly increased upon overexpression of AEG-1 in cultured astrocytes (p < 0.01). Our findings show that AEG-1 serves as an RNA-binding protein to regulate TWIK-1 expression in normal astrocytes.

Original language	English
Article number	85
Pages (from-to)	1-11
Number of pages	11
Journal	Brain Sciences
Volume	11
Issue number	1
DOIs	https://doi.org/10.3390/brainsci11010085
Publication status	Published - 2021 Jan

Bibliographical note

Funding Information:
Funding: This work was supported by the National Research Foundation (NRF) of Korea (NRF-2017R1A2B3012502 and 2020R1A2C2010650).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

AEG-1
Astrocyte
RNA-binding protein
TWIK-1

ASJC Scopus subject areas

General Neuroscience

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3390/brainsci11010085

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title = "AEG-1 regulates TWIK-1 expression as an RNA-binding protein in astrocytes",

abstract = "AEG-1, also called MTDH, has oncogenic potential in numerous cancers and is considered a multifunctional modulator because of its involvement in developmental processes and inflammatory and degenerative brain diseases. However, the role of AEG-1 in astrocytes remains unknown. This study aimed to investigate proteins directly regulated by AEG-1 by analyzing their RNA expression patterns in astrocytes transfected with scramble shRNA and AEG-1 shRNA. AEG-1 knockdown down-regulated TWIK-1 mRNA. Real-time quantitative PCR (qPCR) and immunocytochemistry assays confirmed that AEG-1 modulates TWIK-1 mRNA and protein expression. Electrophysiological experiments further revealed that AEG-1 further regulates TWIK-1-mediated potassium currents in normal astrocytes. An RNA immunoprecipitation assay to determine how AEG-1 regulates the expression of TWIK-1 revealed that AEG-1 binds directly to TWIK-1 mRNA. Furthermore, TWIK-1 mRNA stability was significantly increased upon overexpression of AEG-1 in cultured astrocytes (p < 0.01). Our findings show that AEG-1 serves as an RNA-binding protein to regulate TWIK-1 expression in normal astrocytes.",

keywords = "AEG-1, Astrocyte, RNA-binding protein, TWIK-1",

author = "Jung, {Hyun Gug} and Ajung Kim and Kim, {Seung Chan} and Park, {Jae Yong} and Hwang, {Eun Mi}",

note = "Funding Information: Funding: This work was supported by the National Research Foundation (NRF) of Korea (NRF-2017R1A2B3012502 and 2020R1A2C2010650). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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AU - Kim, Ajung

AU - Kim, Seung Chan

AU - Park, Jae Yong

AU - Hwang, Eun Mi

N1 - Funding Information: Funding: This work was supported by the National Research Foundation (NRF) of Korea (NRF-2017R1A2B3012502 and 2020R1A2C2010650). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/1

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N2 - AEG-1, also called MTDH, has oncogenic potential in numerous cancers and is considered a multifunctional modulator because of its involvement in developmental processes and inflammatory and degenerative brain diseases. However, the role of AEG-1 in astrocytes remains unknown. This study aimed to investigate proteins directly regulated by AEG-1 by analyzing their RNA expression patterns in astrocytes transfected with scramble shRNA and AEG-1 shRNA. AEG-1 knockdown down-regulated TWIK-1 mRNA. Real-time quantitative PCR (qPCR) and immunocytochemistry assays confirmed that AEG-1 modulates TWIK-1 mRNA and protein expression. Electrophysiological experiments further revealed that AEG-1 further regulates TWIK-1-mediated potassium currents in normal astrocytes. An RNA immunoprecipitation assay to determine how AEG-1 regulates the expression of TWIK-1 revealed that AEG-1 binds directly to TWIK-1 mRNA. Furthermore, TWIK-1 mRNA stability was significantly increased upon overexpression of AEG-1 in cultured astrocytes (p < 0.01). Our findings show that AEG-1 serves as an RNA-binding protein to regulate TWIK-1 expression in normal astrocytes.

AB - AEG-1, also called MTDH, has oncogenic potential in numerous cancers and is considered a multifunctional modulator because of its involvement in developmental processes and inflammatory and degenerative brain diseases. However, the role of AEG-1 in astrocytes remains unknown. This study aimed to investigate proteins directly regulated by AEG-1 by analyzing their RNA expression patterns in astrocytes transfected with scramble shRNA and AEG-1 shRNA. AEG-1 knockdown down-regulated TWIK-1 mRNA. Real-time quantitative PCR (qPCR) and immunocytochemistry assays confirmed that AEG-1 modulates TWIK-1 mRNA and protein expression. Electrophysiological experiments further revealed that AEG-1 further regulates TWIK-1-mediated potassium currents in normal astrocytes. An RNA immunoprecipitation assay to determine how AEG-1 regulates the expression of TWIK-1 revealed that AEG-1 binds directly to TWIK-1 mRNA. Furthermore, TWIK-1 mRNA stability was significantly increased upon overexpression of AEG-1 in cultured astrocytes (p < 0.01). Our findings show that AEG-1 serves as an RNA-binding protein to regulate TWIK-1 expression in normal astrocytes.

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AEG-1 regulates TWIK-1 expression as an RNA-binding protein in astrocytes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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