JP4888876B2 - アルツハイマー病の治療のための組換えアデノ随伴ウィルスベクター - Google Patents
アルツハイマー病の治療のための組換えアデノ随伴ウィルスベクター Download PDFInfo
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Description
APP シグナル配列 + Aβ1−43 cDNAを発現するアデノ随伴ウィルスベクターの構築
アミロイド−β1−43(Aβ1−43) cDNAは、ヒトアミロイド前駆タンパク質 (APP) 遺伝子を鋳型として以下のプライマーを用いるPCRにて増幅した。PCR反応液の組成は、TAPS緩衝液(25mM、pH9.3)、KCl(50mM)、MgCl2(2mM)、2−メルカプトエタノール(1mM)、dNTPs(100μM)、鋳型DNA(50〜100ng)、およびプライマー(各0.2μM)とした。サイクル反応の温度条件は、94℃で30秒間、68℃で1分間、および72℃で3分間を1サイクルとし、これを30サイクルとした。
フォワード : 5'-GATGCAGAATTCCGACATGACTCAGGA-3'(配列番号11);および
リバース : 5'-GTCTTAAGTCGCTATGACAACACCGCCC-3'(配列番号12:3’にAflII部位を有する)。
センス :5'-GGTCTAGAATGCTGCCCGGTTTGGCACTGCTCCTGCTGGCCGCCTGGACGGCTCGGGCGCTT-3'(配列番号13);
アンチセンス :5'-AGCGCCCGAGCCGTCCAGGCGGCCAGCAGGAGCAGTGCCAAACCGGGCAGCATTCTAGACC-3'(配列番号14)。
フォワード :5'-GGTCTAGAATGCTGCCCGGTTTGGCAC-3'(配列番号15:5’側にXbaI部位を有する);
リバース :5'-GTCTTAAGTCGCTATGACAACACCGCCC-3'(配列番号12:5’側にAflII部位を有する)。
APPシグナル配列+Aβ1−21cDNAを発現するアデノ随伴ウィルスベクターの構築
APPシグナル配列+Aβ1−43cDNA(XbaI−AflII/blunt) をpBluescriptプラスミド(XbaI−SmaI)に組み込んだ。これを鋳型として、以下のプライマーを用いてPCRを行った。
フォワード:5'-TGGCGGCCGCTCTAGAATG-3'(配列番号16:5'側にNotI部位を有する);
リバース:5'-CACATCTTAAGCAAAGAACACC-3'(配列番号17)。
コントロールとして、GFP グリーン蛍光タンパク質)を発現するアデノ随伴ウイルス (GFPrAAV)を作製した。
ウエスタンブロット解析
APPシグナル配列+Aβ1−43cDNAを発現ベクターpXXUF1に組み込み、lipofectamine 2000(In vitrogen)を用いてHEK293細胞へ導入した48時間後に培養上清と細胞溶解物を抽出し、それぞれ抗Aβ抗体(4G8)で免疫沈降後、SDS-PAGEゲルに電気泳動した。そして、ニトロセルロース膜に蛋白を転写した後、抗Aβ抗体によってAβ蛋白の検出を試みた。その結果、Aβはオリゴマーを形成しながら細胞外に分泌されること、および細胞内では多量の4kDaのAβペプチドモノマー蛋白が生成していることが確認された。
マウス血清の採取
15週齢のマウスに、実施例1のアデノ随伴ウィルスベクター5×1011viral genomeを1回のみ経口投与した。このマウスの血清を1ヶ月後、4ヶ月後、および6ヶ月後にそれぞれ採取した。
Aβ1−42ペプチド(5mg/mL)を96ウェルプレート (Nunc,MaxiSorpp製)の各ウェルに付着させ、5% non-fat milk/TBS-T bufferでブロックした後、上記の採取したマウス血清を加え(500倍希釈)、ペルオキシダーゼ標識抗マウスIgG抗体で検出した。抗体価の評価は、ELISAリーダーでの吸光度測定により行った。その結果を図1に示す。
マウス血清によるAβ凝集反応の阻害試験
Aβ1−40ペプチドを120mMの濃度に調整し、37℃でインキュベーションした。24時間後にAβの凝集が開始するのが見られた。このAβの凝集物にマウスの血清を1:10および1:20(vol: vol)の濃度で加え、37℃で1週間インキュベーションした。Aβ1−40の結合・凝集をマウスの血清が阻害するかどうか、2mMチオフラビン−Tを加え、分光蛍光計(445nmでの励起; 490nmでの発光)を用いて測定した。その結果を図2に示す。
組織からのDNA抽出及びPCR
実施例1のアデノ随伴ウイルスを経口投与した後、28週間のマウスより、心、肺、脾臓、肝臓、上部消化管および腎臓を摘出し、Tris溶液中で組織をホモジネートした後、プロテイナーゼKで蛋白を分解し、フェノール/クロロホルム処理し、DNAを精製した。次に、アデノ随伴ウイルスベクター(pXXUF1)のプロモーター領域の5’側塩基配列とベクターの3’側塩基配列から以下のプライマーを作製し、PCRを行った。PCR反応液の組成は、TAPS緩衝液(25mM、pH9.3)、KCl(50mM)、MgCl2(2mM)、2−メルカプトエタノール(1mM)、dNTPs(100μM)、鋳型DNA(50〜100ng)、およびプライマー(各0.2μM)とした。サイクル反応の温度条件は、94℃で1分間、68℃で20秒間、および72℃で1分間を1サイクルとし、これを30サイクルとした。PCR産物を2%アガロースゲルにて電気泳動し、エチジウムブロミドで染色した。
フォワード:5'-AGTGAACCGTCAGATCGC-3'(配列番号18);
リバース:5'-CGGTATCAGCTCACTCAA-3'(配列番号19)。
マウス脾細胞のAβ1−42ペプチドに対する細胞増殖反応
実施例1のアデノ随伴ウイルスを経口投与した後28週間のマウスより脾細胞を分離し、96ウェルプレートの1ウェルあたり5×104細胞を加え、Aβ1−42ペプチドを各濃度で加えた培養液中で48時間培養した。細胞培養終了後、テトラゾリウム塩(WST−1)を加えた。テトラゾリウム塩は、生細胞にのみ活性のあるミトコンドリアのコハク酸テトラゾリウム還元酵素によりホルマザン色素に変換されるので、ELISAリーダーで色素溶液の吸光度を測定することにより、細胞増殖能反応を判定した。その結果を図3に示す。
組織染色試験1
実施例1のアデノ随伴ウイルスを経口投与したマウス(以下「治療群」という)、または未処置の同齢マウス(以下「コントロール群」という)から、投与後6ヶ月(10ヶ月齢)経過時に組織を得て、その組織の凍結切片を用いて以下の実験を行った。組織中のAβ蛋白や老人斑を検出するために、70%ギ酸で処理し、5% H2O2で内因性のペルオキシダーゼ活性を失活させた。抗Aβ抗体(4G8:1000倍希釈)またはラビット抗Aβ40抗体(1000倍希釈)と反応させた後、ペルオキシダーゼ標識2次抗体を加え、DAB染色を行った。
組織染色試験2
試験例6と同様に、治療群およびコントロール群から、投与後6ヶ月(10ヶ月齢)経過時に組織を得て、その組織の凍結切片を用いて以下の実験を行った。抗CD4抗体、抗CD86抗体、抗CD11b抗体、抗GFAP抗体(アストロサイト)、抗Iba−1抗体(ミクログリア)などの抗体を用いて凍結切片をABC法にて染色して、中枢神経系におけるリンパ球の浸潤の有無を確認した。その結果を表2に示す。
組織染色試験3
実施例2のアデノ随伴ウイルスを経口投与したマウス(以下「治療群2」という)またはコントロール群から、投与後6ヶ月(10ヶ月齢)経過時に組織を得て、その組織の凍結切片を用いて試験例6と同様にDAB染色を行った。
Aβ蓄積面積率の比較1
4匹のマウスからなる3群を用意し、それぞれ、15週齢時(以下「A群」という)、30週齢時(以下「B群」という)、または45週齢時(以下「C群」という)に実施例1のアデノ随伴ウイルス(5.0×1011viral genome/匹)を1回経口投与した。また、6匹のマウスからなるコントロール群を用意し、15週齢時にPBS(0.1mL/匹)を経口投与した。その後、12〜13ヶ月齢(52〜56週齢)の時点で各群を解剖し、前頭葉皮質・頭頂葉・海馬の領域において、それぞれ脳組織切片を得た。そして、これらの組織切片を試験例6と同様に染色し、顕微鏡に連結させた3CCDカメラ用いて観測し、各領域におけるAβ蓄積部分の面積を測定した。そして、各測定部位に占めるAβ蓄積部分の面積率を計算した。その結果を図4に示す。
Aβ蓄積面積率の比較2
4匹のマウスからなる3群を用意し、それぞれ、15週齢時(以下「D群」という)、30週齢時(以下「E群」という)、または45週齢時(以下「F群」という)に実施例2のアデノ随伴ウイルス(5.0×1011viral genome/匹)を1回経口投与した。その後、各群を試験例9と同様に処理し、各測定部位に占めるAβ蓄積部分の面積率を計算した。その結果を図5に示す。
TGF−β1の測定
試験例9および10において、解剖時に各群のマウスから採血し、それらの血清を得た。そして、マウス血清中のTGF−β1濃度を、Quantikine Mouse/Rat/Porcine TGF-β1 Immunoassay(R & D systems社製)を用いて、ELISA法により測定した。その結果を図6に示す。
Claims (10)
- βアミロイドペプチドを腸管細胞において発現しうるアデノ随伴ウィルスベクターを含んでなる、アルツハイマー病を治療するための経口投与用医薬組成物であって、
前記アデノ随伴ウィルスベクターが、
前記βアミロイドペプチドをコードするDNAと、
前記βアミロイドペプチドを細胞外に分泌させることができるシグナルペプチドをコードするDNAと、
を機能しうる形で含んでなる、経口投与用医薬組成物。 - 前記βアミロイドペプチドが、配列番号2で表されるアミノ酸配列中の第4〜10アミノ酸を含んでなるものである、請求項1に記載の経口投与用医薬組成物。
- 前記βアミロイドペプチドをコードするDNAが、配列番号1で表されるヌクレオチド配列中の第10〜30ヌクレオチドを含んでなるものである、請求項1に記載の経口投与用医薬組成物。
- 前記βアミロイドペプチドが、配列番号2で表されるアミノ酸配列を含んでなるものである、請求項1に記載の経口投与用医薬組成物。
- 前記βアミロイドペプチドをコードするDNAが、配列番号1で表されるヌクレオチド配列を含んでなるものである、請求項1に記載の経口投与用医薬組成物。
- 前記βアミロイドペプチドが、配列番号4で表されるアミノ酸配列を含んでなるものである、請求項1に記載の経口投与用医薬組成物。
- 前記βアミロイドペプチドをコードするDNAが、配列番号3で表されるヌクレオチド配列を含んでなるものである、請求項1に記載の経口投与用医薬組成物。
- 前記シグナルペプチドが、アミロイド前駆体タンパク質のシグナルペプチドである、請求項1に記載の経口投与用医薬組成物。
- 前記シグナルペプチドが、配列番号6で表されるアミノ酸配列を含んでなるものである、請求項1に記載の経口投与用医薬組成物。
- 前記シグナルペプチドをコードするDNAが、配列番号5で表されるヌクレオチド配列を含んでなるものである、請求項1に記載の経口投与用医薬組成物。
Priority Applications (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003371103A JP4888876B2 (ja) | 2003-06-13 | 2003-10-30 | アルツハイマー病の治療のための組換えアデノ随伴ウィルスベクター |
| KR1020057023896A KR20060029225A (ko) | 2003-06-13 | 2004-06-11 | 알츠하이머 질환 치료용 재조합 아데노-관련 바이러스 벡터 |
| AT04745818T ATE466093T1 (de) | 2003-06-13 | 2004-06-11 | Rekombinanter adeno-assoziierter virusvektor zur behandlung von morbus alzheimer |
| NZ544554A NZ544554A (en) | 2003-06-13 | 2004-06-11 | Recombinant adeno-associated virus vector for expressing beta-amyloid peptide in intestinal cells to treat Alzheimer's disease |
| EP04745818A EP1634956B1 (en) | 2003-06-13 | 2004-06-11 | Recombinant adeno-associated virus vector for treatment of alzheimer disease |
| CA2529179A CA2529179C (en) | 2003-06-13 | 2004-06-11 | Recombinant adeno-associated virus vector for treatment of alzheimer disease |
| BRPI0411321-7A BRPI0411321A (pt) | 2003-06-13 | 2004-06-11 | vetor viral associado a adenovìrus, composição farmacêutica e método para tratar doença de alzheimer, e, uso do vetor viral associado a adenovìrus |
| DE602004026867T DE602004026867D1 (de) | 2003-06-13 | 2004-06-11 | Rekombinanter adeno-assoziierter virusvektor zur behandlung von morbus alzheimer |
| PCT/JP2004/008224 WO2004111250A1 (ja) | 2003-06-13 | 2004-06-11 | アルツハイマー病の治療のための組換えアデノ随伴ウィルスベクター |
| PT04745818T PT1634956E (pt) | 2003-06-13 | 2004-06-11 | Vector de vírus recombinante adeno-associado para o tratamento da doença de alzheimer |
| US10/560,280 US8318687B2 (en) | 2003-06-13 | 2004-06-11 | Recombinant adeno-associated virus vector for treatment of Alzheimer disease |
| DK04745818.7T DK1634956T3 (da) | 2003-06-13 | 2004-06-11 | Rekombinant andeno-associeret virusvektor til behandling af Alzheimers sygdom |
| AU2004248014A AU2004248014B2 (en) | 2003-06-13 | 2004-06-11 | Recombinant adeno-associated virus vector for treatment of Alzheimer disease |
| RU2006101149/13A RU2335542C2 (ru) | 2003-06-13 | 2004-06-11 | Аденоассоциированный вирусный вектор для лечения болезни альцгеймера, его применение для получения терапевтических средств, а также способ лечения болезни альцгеймера с помощью данного вектора |
| ES04745818T ES2345151T3 (es) | 2003-06-13 | 2004-06-11 | Vector de virus adeno-asociado recombinante para el tratamiento de la enfermedad de alzheimer. |
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| JP2003169714 | 2003-06-13 | ||
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| JP2003371103A JP4888876B2 (ja) | 2003-06-13 | 2003-10-30 | アルツハイマー病の治療のための組換えアデノ随伴ウィルスベクター |
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| JP4888876B2 true JP4888876B2 (ja) | 2012-02-29 |
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| US (1) | US8318687B2 (ja) |
| EP (1) | EP1634956B1 (ja) |
| JP (1) | JP4888876B2 (ja) |
| KR (1) | KR20060029225A (ja) |
| AT (1) | ATE466093T1 (ja) |
| AU (1) | AU2004248014B2 (ja) |
| BR (1) | BRPI0411321A (ja) |
| CA (1) | CA2529179C (ja) |
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| JP2005021149A (ja) | 2005-01-27 |
| EP1634956A4 (en) | 2007-01-24 |
| DE602004026867D1 (de) | 2010-06-10 |
| NZ544554A (en) | 2010-06-25 |
| PT1634956E (pt) | 2010-06-23 |
| BRPI0411321A (pt) | 2006-07-18 |
| US20090004144A1 (en) | 2009-01-01 |
| AU2004248014B2 (en) | 2008-12-04 |
| ES2345151T3 (es) | 2010-09-16 |
| KR20060029225A (ko) | 2006-04-05 |
| CA2529179C (en) | 2012-08-21 |
| ATE466093T1 (de) | 2010-05-15 |
| DK1634956T3 (da) | 2010-08-16 |
| RU2335542C2 (ru) | 2008-10-10 |
| WO2004111250A1 (ja) | 2004-12-23 |
| EP1634956B1 (en) | 2010-04-28 |
| US8318687B2 (en) | 2012-11-27 |
| AU2004248014A1 (en) | 2004-12-23 |
| CA2529179A1 (en) | 2004-12-23 |
| EP1634956A1 (en) | 2006-03-15 |
| RU2006101149A (ru) | 2006-06-27 |
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