J 2020

Nuclear inclusions of pathogenic ataxin-1 induce oxidative stress and perturb the protein synthesis machinery

LAIDOU, Stamatia, Gregorio ALANIS-LOBATO, Jan PŘIBYL, Tamás RASKÓ, Boris TICHÝ et. al.

Basic information

Original name

Nuclear inclusions of pathogenic ataxin-1 induce oxidative stress and perturb the protein synthesis machinery

Authors

LAIDOU, Stamatia, Gregorio ALANIS-LOBATO, Jan PŘIBYL (203 Czech Republic, belonging to the institution), Tamás RASKÓ, Boris TICHÝ (203 Czech Republic, belonging to the institution), Kamil MIKULÁŠEK (203 Czech Republic, belonging to the institution), Maria TSAGIOPOULOU, Jan OPPELT (203 Czech Republic, belonging to the institution), Georgia KASTRINAKI, Maria LEFAKI, Manvendra SINGH, Annika ZINK, Niki CHONDROGIANNI, Fotis PSOMOPOULOS, Alessandro PRIGIONE, Zoltan IVICS, Šárka POSPÍŠILOVÁ (203 Czech Republic, belonging to the institution), Petr SKLÁDAL (203 Czech Republic, belonging to the institution), Zsuzsanna IZSVAK, Miguel A. ANDRADE-NAVARRO and Spyros PETRAKIS

Edition

Redox Biology, Amsterdam, Elsevier, 2020, 2213-2317

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10608 Biochemistry and molecular biology

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 11.799

RIV identification code

RIV/00216224:14740/20:00116844

Organization unit

Central European Institute of Technology

UT WoS

000537459900001

Keywords in English

Ataxin-1; Polyglutamine; Sleeping beauty transposon; Oxidative stress; Protein network; Ribosome

Tags

International impact, Reviewed
Změněno: 2/11/2024 20:27, Ing. Martina Blahová

Abstract

V originále

Spinocerebellar ataxia type-1 (SCA1) is caused by an abnormally expanded polyglutamine (polyQ) tract in ataxin-1. These expansions are responsible for protein misfolding and self-assembly into intranuclear inclusion bodies (IIBs) that are somehow linked to neuronal death. However, owing to lack of a suitable cellular model, the downstream consequences of IIB formation are yet to be resolved. Here, we describe a nuclear protein aggregation model of pathogenic human ataxin-1 and characterize IIB effects. Using an inducible Sleeping Beauty transposon system, we overexpressed the ATXN1(Q82) gene in human mesenchymal stem cells that are resistant to the early cytotoxic effects caused by the expression of the mutant protein. We characterized the structure and the protein composition of insoluble polyQ IIBs which gradually occupy the nuclei and are responsible for the generation of reactive oxygen species. In response to their formation, our transcriptome analysis reveals a cerebellum-specific perturbed protein interaction network, primarily affecting protein synthesis. We propose that insoluble polyQ IIBs cause oxidative and nucleolar stress and affect the assembly of the ribosome by capturing or down-regulating essential components. The inducible cell system can be utilized to decipher the cellular consequences of polyQ protein aggregation. Our strategy provides a broadly applicable methodology for studying polyQ diseases.

Links

EF16_013/0001776, research and development project
Name: Česká infrastruktura pro integrativní strukturní biologii pro lidské zdraví
LM2018140, research and development project
Name: e-Infrastruktura CZ (Acronym: e-INFRA CZ)
Investor: Ministry of Education, Youth and Sports of the CR
692298, interní kód MU
Name: MEDGENET - Medical genomics and epigenomics network (Acronym: MEDGENET)
Investor: European Union, Spreading excellence and widening participation
90132, large research infrastructures
Name: NCMG II