METHOD OF DETECTING NEURONAL INTRANUCLEAR INCLUSION DISEASE PATIENT

To provide novel means capable of conveniently detecting abnormal elongation of a repeated sequence in NOTCH2NLC gene, which is a genetic cause of neuronal intranuclear inclusion disease.SOLUTION: As a result of keen researches, developed herein is a detection method making it possible to convenient...

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Hauptverfasser: SOFUE HAJIME, MIHASHI SATOMI, FUJITA ATSUSHI, SONE JUN, MATSUMOTO NAOMICHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide novel means capable of conveniently detecting abnormal elongation of a repeated sequence in NOTCH2NLC gene, which is a genetic cause of neuronal intranuclear inclusion disease.SOLUTION: As a result of keen researches, developed herein is a detection method making it possible to conveniently detect whether a repeated sequence present in the 5' untranslated region of exon 1 of NOTCH2NLC gene is abnormally elongated, by means of repeat primed PCR using a specific primer mix. In addition, it is found that the number of repeated triplets can be conveniently calculated by means of fluorescent amplicon length analysis. It is also found that, whereas NIID patients with dementia as the predominant symptom have abnormal elongation only of GGC repeats, NIID patients with muscular weakness as the predominant symptom have elongation of a GGA repeated sequence in addition to the elongation of the GGC repeats, so that the predominant symptom can be determined on the basis of whether the elongation of the GGA repeated sequence exists.SELECTED DRAWING: Figure 3 【課題】神経核内封入体病の遺伝的原因であるNOTCH2NLC遺伝子内の繰り返し配列の異常伸長を簡便に検出できる新規な手段を提供すること。【解決手段】本願発明者らは、鋭意研究の結果、特定のプライマーミックスを用いたリピートプライムドPCRにより、NOTCH2NLC遺伝子のエクソン1の5'非翻訳領域内に存在する繰り返し配列が異常伸長しているか否かを簡便に検出できる検出法を開発し、さらに、蛍光アンプリコン長分析によってトリプレットの繰り返し回数を簡便に算出できることを見出した。さらに、認知症を主症状とするNIID患者においてはGGC繰り返しのみが異常伸長しているのに対し、筋力低下を主症状とするNIID患者においてはGGC繰り返しの伸長に加えGGA繰り返し配列も伸長しており、GGA繰り返し配列の伸長の有無に基づいて主症状を判定できることも見出した。【選択図】図3