JP2013066454A - 注意欠陥多動性障害の診断用snpとそれを含むマイクロアレイ及びキット - Google Patents
注意欠陥多動性障害の診断用snpとそれを含むマイクロアレイ及びキット Download PDFInfo
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Abstract
【解決手段】本発明によると、ヒトの17番染色体の24926101番目の塩基であるC/Tを含むポリヌクレオチド、GIT1遺伝子内のrs550818一塩基多型の塩基を確認して、注意欠陥多動性障害の発病危険性を予測する方法が提供される。また、前記一塩基多型を検出するためのプローブまたは前記染色体部位を増幅するためのプライマーを含む注意欠陥多動性障害の発病危険性を診断するための組成物及び前記プローブを表面に固定させた検診用キットが提供される。従って、本発明による予測方法、診断用組成物及びキットは、簡便且つ高感度で注意欠陥多動性障害の発病危険群を分類することができ、これらの危険群を予め予防したり早期発見できるようにする有用な技術である。
Description
本発明は、韓国人からなる注意欠陥多動性障害の患者群と対照群との連関性を研究するために、総388人のゲノムDNAを利用した。対象人の血液はソウル大学病院の内部倫理委員会の承認の元収集された。192人の注意欠陥多動性障害の患者群と、患者群と年齢を合わせた疾病が発病していない196人の対照群とに基き、連関分析を行った。具体的には、前記研究対象から得た血液試料から、PuregeneTM DNA purification kit(Gentra、Minneapolis、MN)を用いてゲノムDNAを抽出した。抽出されたDNAは、二本鎖DNAのみを特異的に定量するPicoGreen(Molecular Probes、Eugene、OR)蛍光染料を用いて濃度を測定した後、遺伝子型解析(genotyping)に適する2.510ng/μlの濃度で保管した。
<2−1>遺伝子多型の選定
本発明者らは、International Hapmapデータベースに基き、GIT1遺伝子が含まれた17番染色体内の19−キロベース領域で27個の一塩基多型を分析対象として選定し、注意欠陥多動性障害の患者群−対照群に対する連関研究を分析した。
本発明におけるGIT1遺伝子多型の遺伝子型は、マトリックス支援レーザー脱離イオン化−飛行時間型質量分析(MALDI−TOF、Matrix Assisted Laser Desorption and Ionization−Time of Flight Mass Spectrometry)の質量分析器を利用したMassARRAYTM system(Sequenom、SanDiego、CA)を利用して分析した。前記分析に用いられた重合酵素連鎖反応(polymerase chain reaction;PCR)用プライマー(primer)と塩基延長反応(extension reaction)用プライマー配列は、下記表1乃至表3に示されたように、遺伝子型解析に用いられたプライマーはAssay Design 3.1(Sequenom、SanDiego、CA)プログラムを用いて設計された。
本発明の統計分析は、χ2独立性の検定(chi−square testfor independence)を利用してハーディ‐ワインベルク平衡(Hardy−Weinberg equilibrium;HWE)を分析し、後で注意欠陥多動性障害の患者群−対照群間の性別及びIQ指数の差を補正するために、ロジスティック回帰分析を利用して注意欠陥多動性障害の発病危険性と夫々の多型との関連性を分析した。全ての統計分析は、SPSS 15プログラムを利用した。
本発明のGIT1遺伝子内の27個の一塩基多型の注意欠陥多動性障害の発病感受性との連関性分析を行った。
Claims (15)
- ヒトの17番染色体の24926101番目の塩基であるC/Tを含むポリヌクレオチド、GIT1遺伝子内のrs550818一塩基多型を含む注意欠陥多動性障害の診断用組成物。
- 前記GIT1遺伝子内のrs550818一塩基多型周辺の連鎖不平衡部位を含む請求項1に記載の注意欠陥多動性障害の診断用組成物。
- 前記注意欠陥多動性障害と有意の相関関係を有する所定の一塩基多型を含む染色体部位と相補的な配列を有するプローブ、及び/または前記染色体部位の増幅のためのプライマーを含む請求項1または2に記載の注意欠陥多動性障害の診断用組成物。
- 1)被検体由来の生物学的試料から核酸試料を分離する段階と、
2)段階1)で分離した核酸試料で、GIT1遺伝子内のrs550818一塩基多型塩基をヒト染色体17番の24926101番目の塩基位置で確認する段階と、
3)前記段階2)で確認されたrs550818一塩基多型の対立遺伝子型がC/Tである場合、注意欠陥多動性障害の発病危険度が高いと判定する段階と、を含む注意欠陥多動性障害の危険度の予測方法。 - 前記生物学的試料は、毛、血液、組職、細胞、血清、血漿、唾液、喀痰及び尿からなる群から選択される何れか一つであることを特徴とする請求項4に記載の方法。
- 前記段階2)は、マイクロアレイ(microarray)によるプローブハイブリダイゼーション法、対立遺伝子特異的プローブハイブリダイゼーション法(allele−specific probe hybridization)、対立遺伝子特異的増幅法(allele−specific amplification)、配列決定法(sequencing)、5’ヌクレアーゼ分解法(5’nuclease digestion)、分子ビーコンアッセイ法(molecular beacon assay)、オリゴヌクレオチド結合アッセイ法(oligonucleotide ligation assay)、サイズ分析法(size analysis)及び一本鎖高次構造多型法(single−stranded conformation polymorphism)からなる群から選択される一つ以上の方法により行われることを特徴とする請求項4に記載の方法。
- GIT1遺伝子内のrs550818一塩基多型部位の配列を含むプローブ、または前記一塩基多型部位の増幅のためのプライマーを含み、重合酵素連鎖反応により増幅してポリヌクレオチドを決定する段階を含むことを特徴とする注意欠陥多動性障害の危険度の予測方法。
- 前記重合酵素連鎖反応は、リアルタイム重合酵素連鎖反応(RT−PCR)またはPNAプローブを用いた重合酵素連鎖反応であることを特徴とする請求項7に記載の予測方法。
- GIT1遺伝子内のrs550818一塩基多型塩基のC/Tとハイブリダイゼーションするポリヌクレオチドまたはその相補的なポリヌクレオチドを含む、注意欠陥多動性障害の危険度の診断用マイクロアレイ。
- 前記注意欠陥多動性障害の診断用マイクロアレイを構成するポリヌクレオチドは、アミノ−シラン、ポリ−L−リジン及びアルデヒドからなる群から選択される一つ以上の活性基がコーティングされた基板に固定されることを特徴とする請求項9に記載のマイクロアレイ。
- 前記基板は、シリコンウェハ、ガラス、石英、金属、ナイロン膜、ニトロセルロース膜(nitrocellulose membrane)、及びプラスチックからなる群から選択される一つ以上であることを特徴とする請求項10に記載のマイクロアレイ。
- 請求項9から11に記載のマイクロアレイを含む注意欠陥多動性障害の危険度の診断用キット。
- 前記マイクロアレイは、ストレプトアビジン−アルカリホスファターゼ結合物質(streptoavidin−alkaline phosphatase conjugate)、化学蛍光物質(chemiflurorensce)及び化学発光物質(chemiluminescent)からなる群から選択される何れか一つをさらに含んでハイブリダイゼーションすることを特徴とする請求項12に記載のキット。
- 前記ハイブリダイゼーションに用いられる緩衝溶液、RNAからcDNAを合成するための逆転写酵素、dNTPs及びrNTP(事前混合型または分離供給型)、標識試薬、及び洗浄緩衝溶液からなる反応試薬群から選択される何れか一つ以上をさらに含むことを特徴とする請求項13に記載のキット。
- 前記化学蛍光物質は、Cy3、Cy5、FITC(poly L−lysine−fluorescein isothiocyanate)、RITC(rhodamine−B−isothiocyanate)及びローダミン(rhodamine)からなる群から選択される一つ以上であることを特徴とする請求項14に記載のキット。
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