JP2022508304A - Ad誘発mciの診断マーカーとその応用 - Google Patents
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Abstract
Description
本発明は、AD誘発MCIの診断キットの製造へのAD誘発MCIの診断マーカーの応用を更に提供する。
(1)被試験サンプルから総RNAを抽出する。
(2)得られた総RNAに対して逆転写反応をmiRNA逆転写キットで行い、対応cDNAを取得する。
(3)得られたcDNAに対してリアルタイム蛍光定量PCRを行い、has-miR-93-5pを内部標準として検出された結果を△Ctで表し、ここで、△Ct = Ct microRNA-Ct has-miR-93- 5pである;
(4)得られた結果を下記の公式に代入する。
7.341-0.029×hsa-miR-134-3p-0.150×hsa-miR-22-5p-0.604×hsa-miR-1185-2-3p-5.321×hsa-miR-1909-3p-1.372×hsa-miR-107。
計算値を0.174と比較する。
受験者は上海の長寧区と徐匯区のコミュニティで募集された50例のAD誘発MCIの高齢者であり、対照群は年齢、性別、教育年数の一致する健康な高齢者である。
1.チップ検出
(1) RNAをTRIzol法で抽出し、RNasey Mini Kit(QIAGEN)で精製する。NanoDrop ND-1000で精製済のRNAの濃度を測定し、電気泳動で完全なRNAを検出する。
(2) 抽出したRNAが品質検査に合格した後、miRCURYTM Array Power Labeling kit(Cat # 208032-A, Exiqon)でmiRNAを標識する。標識が完了した後、サンプルはmiRCURYTM LNA Array(v.19.0)(Exiqon)チップとハイブリダイズし、総反応量は50ul(25ulのサンプルと25ulのハイブリダイゼーションバッファー)であり、95℃で変性を2分間行い、氷上に2分間置き、56℃でチップと16~20時間ハイブリダイズする(ハイブリダイゼーションシステムは、Nimblegen Systems, Inc, Madison, WI, USAである)。ハイブリダイゼーションが完了した後、Wash buffer kit(Exiqon)でチップを洗浄する。
(3)Axon GenePix4000Bチップスキャナーでチップを走査する。
チップを検出した後、リアルタイム定量PCR検証を行うために、対照群と比較して大幅に下がったmicroRNAを選択する。具体的な実施方法は次のとおりである。
(1)RNAをTRIzol法で抽出し、RNasey Mini Kit(QIAGEN)で精製する。NanoDrop ND-1000で精製済のRNAの濃度を測定する。
(2)抽出したRNAが品質検査に合格した後、逆転写反応を行う。総反応量は20ul(総RNAは300ngであり、逆転写特異的プライマーは0.3ulであり、RNA酵素阻害剤は0.3ulであり、バッファーは2ulであり、MMLV逆転写酵素は0.3ulであり、dNTPは2ulであり、ヌクレアーゼフリー水を20ulまで添加する)であり、異なる温度(16℃、42℃、85℃)でさまざまな時間(30分間、40分間、5分間)かけて反応を行う。逆転写特異的プライマーの情報を下記の表1に示す。
1回目のリアルタイム定量的PCR検証を行った後、対照群よりも発現レベルが大幅に下がったmicroRNAを選択し、以前にアルツハイマー病群で発現の大幅な減少を既に確認したHsa-miR-107を追加して再検証する。具体的な実施方法は次のとおりである。
チップ検出の段階で、MCI群のhsa-miR-134-3p、hsa-miR-34b-5p、hsa-miR-22-5p、hsa-miR-1909-3p、hsa-miR-1185-2-3p、hsa-miR-569及びhsa-miR-5691の発現レベルは、正常な対照群よりも大幅に低くなっている。具体的なデータを下記の表3に示す。
Logit(p=MCI)=7.341-0.029×hsa-miR-134-3p-0.150×hsa-miR-22-5p-0.604×hsa-miR-1185-2-3p-5.321×hsa-miR-1909-3p-1.372×hsa-miR-107。
Claims (7)
- AD誘発MCIの診断マーカーであって、前記マーカーは血漿miRNAである。前記血漿miRNAは、hsa-miR-1185-2-3pとhsa-miR-22-5pとhsa-miR-134-3pとhsa-miR-1909-3pとhsa-miR-107とを含む診断マーカー。
- AD誘発MCIの診断キットの製造への請求項1に記載のAD誘発MCIの診断マーカーの応用。
- AD誘発MCIの診断キットであって、血漿中のhsa-miR-1185-2-3p、hsa-miR-22-5p、hsa-miR-134-3p、hsa-miR-1909-3p及びhsa-miR-107の含有量を測定するためのAD誘発MCIの診断キット。
- hsa-miR-1185-2-3p、hsa-miR-22-5p、hsa-miR-134-3p、hsa-miR-1909-3p及びhsa-miR-107のプライマー及びプローブを含むことを特徴とする、請求項3に記載のAD誘発MCIの診断キット。
- 内部標準has-miR-93-5pを含むことを特徴とする、請求項4に記載のAD誘発MCIの診断キット。
- 前記診断キットによって測定された血漿中のhsa-miR-1185-2-3p、hsa-miR-22-5p、hsa-miR-134-3p、hsa-miR-1909-3p及びhsa-miR-107の含有量を計算する計算式が7.341-0.029×hsa-miR-134-3p-0.150×hsa-miR-22-5p-0.604×hsa-miR-1185-2-3p-5.321×hsa-miR-1909-3p-1.372×hsa-miR-107であることを特徴とする、請求項3に記載の診断キット。
- (1)被試験サンプルから総RNAを抽出すること、
(2)得られた総RNAに対して逆転写反応をmiRNA逆転写キットで行い、対応cDNAを取得すること、
(3)得られたcDNAに対してリアルタイム蛍光定量PCRを行い、has-miR-93-5pを内部標準として検出された結果を△Ctで表し、ここで、△Ct = Ct microRNA-Ct has-miR-93- 5pであること、
(4)得られた結果を下記の公式に代入し、
7.341-0.029×hsa-miR-134-3p-0.150×hsa-miR-22-5p-0.604×hsa-miR-1185-2-3p-5.321×hsa-miR-1909-3p-1.372×hsa-miR-107、
計算値を0.174と比較すること
を含むことを特徴とする、請求項3~6のいずれかに記載のAD誘発MCIの診断キットの使用方法。
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CN201811126537.7 | 2018-09-26 | ||
PCT/CN2019/095667 WO2020063034A1 (zh) | 2018-09-26 | 2019-07-12 | Ad所致mci诊断标志物及其应用 |
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CN109055541B (zh) * | 2018-09-26 | 2020-08-28 | 上海市精神卫生中心(上海市心理咨询培训中心) | Ad所致mci诊断标志物及其应用 |
CN111518205B (zh) * | 2019-02-01 | 2022-03-29 | 长春金赛药业有限责任公司 | 人源化抗Aβ单克隆抗体及其应用 |
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