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Variability of the human mitochondrial DNA control region sequences in the Lithuanian population

100%
Kasperaviciute D., Kucinskas V.
Journal of Applied Genetics
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2002
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vol. 43
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issue 2
255-260
EN
The Lithuanians and Latvians are the only two Baltic cultures that survived until today. Since the Neolithic period the native inhabitants of the present-day Lithuanian territory have not been replaced by any other ethnic group. Therefore the genetic characterization of the present-day Lithuanians may shed some light on the early history of the Balts. We have analysed 120 DNA samples from two Lithuanian ethnolinguistic groups (Aukstaiciai and Zemaiciai) by direct sequencing of the first hypervariable segment (HVI) of the control region of mitochondrial DNA (mtDNA) and restriction enzyme digestion for polymorphic site 00073. On the basis of specific nucleotide substitutions the obtained sequences were classified to mtDNA haplogroups. This revealed the presence of almost all European haplogroups (except X) in the Lithuanian sample, including those that expanded through Europe in the Palaeolithic and those whose expansion occurred during the Neolithic. Molecular diversity indices (gene diversity 0.97, nucleotide diversity 0.012 and mean number of pairwise differences 4.5) were within the range usually reported in European populations. No significant differences between Aukstaiciai and Zemaiciai subgroups were found, but some slight differences need further investigation.
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Mitochondrial DNA in pathogenesis of Alzheimer's and Parkinson's diseases

75%
Maruszak A., Gaweda-Walerych K., Soltyszewski I., Zekanowski C.
Acta Neurobiologiae Experimentalis
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2006
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vol. 66
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issue 2
153-176
EN
A critical role of mitochondrial dysfunction and oxidative damage has been implicated in etiopathology of many neurodegenerative disorders, as well as in normal aging. Alzheimer's and Parkinson's diseases are common devastating late-onset neurodegenerative disorders, associated with mitochondrial DNA variations, which are suggested to affect mitochondrial functions. This paper reviews the current knowledge on the inherited and somatic mtDNA variations in both conditions.
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