著者

菊池 真 舘 延忠 小塚 直樹 二宮 孝文 小林 正裕 堀本 佳誉 内田 英二 佐々木 公男 辰巳 治之

出版者

札幌医科大学医学部

雑誌

札幌医学雑誌 = The Sapporo medical journal = The Sapporo medical journal (ISSN:0036472X)

巻号頁・発行日

vol.74, no.3, pp.39-44, 2005-08-01

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Formalin is a main fixative in the field of pathology. Molecular biological analysis of formalin-fixed samples was difficult because formalin fixation decreased the quality of isolated DNA. Therefore, we compared the quality of DNA obtained by using DNA extraction kit (Sepa GeneR) to that using proteinase K. Using proteinase K, it was possible to extract high quality DNA, and obtain DNA from samples of 3 months fixative. Moreover, by proteinase K method, it was also possible to analyze aprataxin gene exon 5 in DNA extraction from formalin-fixed human brain tissues from a suspected case of early-onset ataxia with ocular motor apraxia and hypoalbuminemia (EAOH). The aprataxin gene exon 5 DNA sequences were obtained following in vitro gene amplification using nested-PCR. Mutation on aprataxin gene exon5 was not observed in the suspected case of EAOH; however, it was possible to perform sequence analysis of aprataxin gene exon5. This method was more useful for DNA extraction and direct sequencing of formalin-fixation samples than the kit method.