{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T12:08:26Z","timestamp":1788350906551,"version":"build-2803163510"},"reference-count":30,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2019,5,24]],"date-time":"2019-05-24T00:00:00Z","timestamp":1558656000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100004587","name":"Instituto de Salud Carlos III","doi-asserted-by":"publisher","award":["PI12\/00879"],"award-info":[{"award-number":["PI12\/00879"]}],"id":[{"id":"10.13039\/501100004587","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004587","name":"Instituto de Salud Carlos III","doi-asserted-by":"publisher","award":["PI17\/01067"],"award-info":[{"award-number":["PI17\/01067"]}],"id":[{"id":"10.13039\/501100004587","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004837","name":"Ministerio de Ciencia e Innovaci\u00f3n","doi-asserted-by":"publisher","award":["SAF2017\u201089791\u2010R"],"award-info":[{"award-number":["SAF2017\u201089791\u2010R"]}],"id":[{"id":"10.13039\/501100004837","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Genes Brain and Behavior"],"published-print":{"date-parts":[[2019,6]]},"abstract":"<jats:p>Fragile X\u2010associated tremor\/ataxia syndrome (FXTAS) is a late\u2010onset neurodegenerative disorder that appears in at least one\u2010third of adult carriers of a premutation (55\u2010200 CGG repeats) in the fragile X mental retardation 1 (<jats:italic>FMR1<\/jats:italic>) gene. Several studies have shown that mitochondrial dysfunction may play a central role in aging and also in neurodegenerative disorders such as Alzheimer's disease, Parkinson's disease, Huntington's disease as well as in FXTAS. It has been recently proposed that mtDNA copy number, measured by the number of mitochondrial genomes per nuclear genome (diploid), could be a useful biomarker of mitochondrial dysfunction. In order to elucidate the role of mtDNA variation in the pathogenesis of FXTAS, mtDNA copy number was quantified by digital droplet Polymerase chain reaction. In human brain samples, mtDNA levels were measured in the cerebellar vermis, dentate nucleus, parietal and temporal cortex, thalamus, caudate nucleus and hippocampus from a female FXTAS patient, a <jats:italic>FMR1<\/jats:italic> premutation male carrier without FXTAS and from three male controls. The mtDNA copy number was further analyzed using this technology in dermal fibroblasts primary cultures derived from three FXTAS patients and three controls as well as in cortex and cerebellum of a CGG knock in FXTAS mice model. Finally, qPCR was carried out in human blood samples. Results indicate reduced mtDNA copy number in the specific brain region associated with disease progression in FXTAS patients, providing new insights into the role of mitochondrial dysfunction in the pathogenesis of FXTAS.<\/jats:p>","DOI":"10.1111\/gbb.12565","type":"journal-article","created":{"date-parts":[[2019,3,19]],"date-time":"2019-03-19T22:09:48Z","timestamp":1553033388000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Fragile X\u2010associated tremor\/ataxia syndrome: Regional decrease of mitochondrial DNA copy number relates to clinical manifestations"],"prefix":"10.1111","volume":"18","author":[{"given":"Maria I.","family":"Alvarez\u2010Mora","sequence":"first","affiliation":[{"name":"Biochemistry and Molecular Genetics Department Hospital Clinic of Barcelona  Barcelona Spain"},{"name":"CIBER of Rare Diseases (CIBERER) Instituto de Salud Carlos III  Barcelona Spain"},{"name":"Institut 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