DOI: 10.1111/j.1471-4159.2008.05747.x. CGG‐repeat length and neuropathological and molecular correlates in a mouse model for fragile X‐associated tremor/ataxia syndrome

CGG‐repeat length and neuropathological and molecular correlates in a mouse model for fragile X‐associated tremor/ataxia syndrome

10.1111/j.1471-4159.2008.05747.x

Crossref journal-article

Wiley

Journal of Neurochemistry (311)

Abstract

AbstractThe 5′untranslated region (UTR) of the FMR1 gene contains a CGG‐repeat, which may become unstable upon transmission to the next generation. When repeat length exceeds 200, the FMR1 gene generally undergoes methylation‐mediated transcriptional silencing. The subsequent absence of the gene product Fragile X Mental Retardation Protein (FMRP)causes the mental retardation seen in fragile X patients. A CGG‐repeat length between 55 and 200 trinucleotides has been termed the premutation (PM). Predominantly elderly male PM carriers are at risk of developing a progressive neurodegenerative disorder: fragile X‐associated tremor/ataxia syndrome (FXTAS). All PM carriers have elevated FMR1 mRNA levels, in spite of slightly decreased FMRP levels. The presence of intranuclear ubiquitin‐positive inclusions in many brain regions is a neuropathological hallmark of FXTAS. Studies in humans attempting to correlate neuropathological outcomes with molecular measures are difficult because of the limited availability of tissue. Therefore, we have used the expanded CGG‐repeat knock‐in mouse model of FXTAS to examine the relationship between the molecular and neuropathological parameters in brain. We present Fmr1 mRNA and Fmrp levels and the presence of intranuclear inclusions at different repeat lengths. Contrary to existing hypotheses, our results suggest that inclusion formation may not depend on the elevation per se of Fmr1 transcript levels in aged CGG mice.

Bibliography

Brouwer, J. R., Huizer, K., Severijnen, L., Hukema, R. K., Berman, R. F., Oostra, B. A., & Willemsen, R. (2008). CGGârepeat length and neuropathological and molecular correlates in a mouse model for fragile Xâassociated tremor/ataxia syndrome. Journal of Neurochemistry, 107(6), 1671â1682. Portico.

Authors 7

Judith R. Brouwer (first)
Karin Huizer (additional)
Lies‐Anne Severijnen (additional)
Renate K. Hukema (additional)
Robert F. Berman (additional)
Ben A. Oostra (additional)
Rob Willemsen (additional)

References 59 Referenced 81

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Dates

Type	When
Created	16 years, 9 months ago (Nov. 12, 2008, 11:32 a.m.)
Deposited	2 years ago (Aug. 20, 2023, 8:31 p.m.)
Indexed	1 year, 1 month ago (July 29, 2024, 11:50 a.m.)
Issued	16 years, 9 months ago (Nov. 24, 2008)
Published	16 years, 9 months ago (Nov. 24, 2008)
Published Online	16 years, 9 months ago (Nov. 24, 2008)
Published Print	16 years, 9 months ago (Dec. 1, 2008)

Funders 0

None

BibTeX

@article{Brouwer_2008, title={CGG‐repeat length and neuropathological and molecular correlates in a mouse model for fragile X‐associated tremor/ataxia syndrome}, volume={107}, ISSN={1471-4159}, url={http://dx.doi.org/10.1111/j.1471-4159.2008.05747.x}, DOI={10.1111/j.1471-4159.2008.05747.x}, number={6}, journal={Journal of Neurochemistry}, publisher={Wiley}, author={Brouwer, Judith R. and Huizer, Karin and Severijnen, Lies‐Anne and Hukema, Renate K. and Berman, Robert F. and Oostra, Ben A. and Willemsen, Rob}, year={2008}, month=nov, pages={1671–1682} }

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