Marika Giuliano, Sandro Santa Paola, Eugenia Borgione, Mariangela Lo Giudice, Francesco Domenico Di Blasi, Rosa Pettinato, Corrado Romano, Carmela Scuderi
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The 9 bp Deletion between the Mitochondrial COII and Lysine tRNA Genes in a Caucasian Population with Cognitive Disorders: An Observational Study.
The loss of one of the two copies of the 9 bp tandem repeat sequence (CCCCCTCTA) located in the small non-coding region between the cytochrome oxidase II (COII) and the lysine tRNA genes in human mtDNA has been reported to be polymorphic in Asian, Oceanian and Sub-Saharan African populations, but it has rarely been observed in Europe. In this study, we will evaluate the possible association between the MIC9D polymorphism and cognitive disorders. A genetic analysis of unrelated Sicilian patients with cognitive deficits was performed to identify the 9 bp deletion MIC9D polymorphism. The MIC9D polymorphism was found in six patients, whereas this variant was absent in control individuals without cognitive deficits. The patients with the MIC9D polymorphism exhibited more complex clinical presentations; in particular, all had neuromuscular disorders and five also presented with behavioral disorders. The present study suggests a potential association between the MIC9D polymorphism and cognitive impairment with concurrent neuromuscular and behavioral involvement.
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The International Journal of Molecular Sciences (ISSN 1422-0067) provides an advanced forum for chemistry, molecular physics (chemical physics and physical chemistry) and molecular biology. It publishes research articles, reviews, communications and short notes. Our aim is to encourage scientists to publish their theoretical and experimental results in as much detail as possible. Therefore, there is no restriction on the length of the papers or the number of electronics supplementary files. For articles with computational results, the full experimental details must be provided so that the results can be reproduced. Electronic files regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material (including animated pictures, videos, interactive Excel sheets, software executables and others).
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