Cited by 98Genetic Neurodegenerative DiseasesMicroRNA in disease regulationNeuroinflammation and Neurodegeneration Mechanisms

Regulation of miR-146a by RelA/NFkB and p53 in STHdhQ111/HdhQ111 Cells, a Cell Model of Huntington's Disease

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Ghose, Jayeeta, Sinha, Mithun, Das, Eashita, Jana, Nihar R., Bhattacharyya, Nitai P.·2011·PLoS ONE

Abstract

Huntington's disease (HD) is caused by the expansion of N-terminal polymorphic poly Q stretch of the protein huntingtin (HTT). Deregulated microRNAs and loss of function of transcription factors recruited to mutant HTT aggregates could cause characteristic transcriptional deregulation associated with HD. We observed earlier that expressions of miR-125b, miR-146a and miR-150 are decreased in STHdh(Q111)/Hdh(Q111) cells, a model for HD in comparison to those of wild type STHdh(Q7)/Hdh(Q7) cells. In the present manuscript, we show by luciferase reporter assays and real time PCR that decreased miR-146a expression in STHdh(Q111)/Hdh(Q111) cells is due to decreased expression and activity of p65 subunit of NFkB (RelA/NFkB). By reporter luciferase assay, RT-PCR and western blot analysis, we also show that both miR-150 and miR-125b target p53. This partially explains the up regulation of p53 observed in HD. Elevated p53 interacts with RelA/NFkB, reduces its expression and activity and decreases the expression of miR-146a, while knocking down p53 increases RelA/NFkB and miR-146a expressions. We also demonstrate that expression of p53 is increased and levels of RelA/NFkB, miR-146a, miR-150 and miR-125b are decreased in striatum of R6/2 mice, a mouse model of HD and in cell models of HD. In a cell model, this effect could be reversed by exogenous expression of chaperone like proteins HYPK and Hsp70. We conclude that (i) miR-125b and miR-150 target p53, which in turn regulates RelA/NFkB and miR-146a expressions; (ii) reduced miR-125b and miR-150 expressions, increased p53 level and decreased RelA/NFkB and miR-146a expressions originate from mutant HTT (iii) p53 directly or indirectly regulates the expression of miR-146a. Our observation of interplay between transcription factors and miRNAs using HD cell model provides an important platform upon which further work is to be done to establish if such regulation plays any role in HD pathogenesis.

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Authors
Ghose, J., Sinha, M., Das, E., Jana, N. R., & Bhattacharyya, N. P.
Affiliations
  • Saha Institute of Nuclear Physics (IN)
  • National Brain Research Centre (IN)
Corresponding author
Bhattacharyya, Nitai P.
Venue
PLoS ONE
Published
2011-08-26
Volume
6
Issue
8
Pages
e23837
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2011695980
Cited by
98
References
72
Citations by year
2026: 2 · 2025: 2 · 2024: 4 · 2023: 8 · 2022: 4 · 2021: 7 · 2020: 8 · 2019: 3 · 2018: 6 · 2017: 7 · 2016: 8 · 2015: 8 · 2014: 10 · 2013: 11 · 2012: 9
FWCI
4.11
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Massachusetts General Hospital
  • Department of Atomic Energy, Government of India
  • Nuclear Physics
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Huntington's disease, miR-146a, p53, microRNA regulation, miR-125b, miR-150, mutant huntingtin, R6/2 mice, HSP70, transcriptional regulation, striatum, polyglutamine
MeSH terms
Huntingtin Protein, Gene Expression Regulation, Humans, Huntington Disease, Nerve Tissue Proteins, Nuclear Proteins, Tumor Cells, Cultured, Tumor Suppressor Protein p53, NF-kappa B, MicroRNAs, Transcription Factor RelA

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