PIAS1 modulates striatal transcription, DNA damage repair, and SUMOylation with relevance to Huntington's disease.
Proc Natl Acad Sci U S A
; 118(4)2021 01 26.
Article
en En
| MEDLINE
| ID: mdl-33468657
DNA damage repair genes are modifiers of disease onset in Huntington's disease (HD), but how this process intersects with associated disease pathways remains unclear. Here we evaluated the mechanistic contributions of protein inhibitor of activated STAT-1 (PIAS1) in HD mice and HD patient-derived induced pluripotent stem cells (iPSCs) and find a link between PIAS1 and DNA damage repair pathways. We show that PIAS1 is a component of the transcription-coupled repair complex, that includes the DNA damage end processing enzyme polynucleotide kinase-phosphatase (PNKP), and that PIAS1 is a SUMO E3 ligase for PNKP. Pias1 knockdown (KD) in HD mice had a normalizing effect on HD transcriptional dysregulation associated with synaptic function and disease-associated transcriptional coexpression modules enriched for DNA damage repair mechanisms as did reduction of PIAS1 in HD iPSC-derived neurons. KD also restored mutant HTT-perturbed enzymatic activity of PNKP and modulated genomic integrity of several transcriptionally normalized genes. The findings here now link SUMO modifying machinery to DNA damage repair responses and transcriptional modulation in neurodegenerative disease.
Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
ADN
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Procesamiento Proteico-Postraduccional
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Enfermedad de Huntington
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Fosfotransferasas (Aceptor de Grupo Alcohol)
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Proteínas Modificadoras Pequeñas Relacionadas con Ubiquitina
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Enzimas Reparadoras del ADN
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Reparación del ADN
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Proteínas Inhibidoras de STAT Activados
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Proteína Huntingtina
Tipo de estudio:
Prognostic_studies
Límite:
Animals
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Female
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Humans
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Male
Idioma:
En
Revista:
Proc Natl Acad Sci U S A
Año:
2021
Tipo del documento:
Article