JP6727962B2 - 癌の予防又は治療剤 - Google Patents
癌の予防又は治療剤 Download PDFInfo
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Description
[1]配列番号1に記載のアミノ酸配列からなるペプチド若しくはその誘導体、又は配列番号1に記載のアミノ酸配列において1若しくは複数個のアミノ酸が欠失、置換若しくは付加されたアミノ酸配列からなり、かつ微小管結合活性を有するペプチド若しくはその誘導体、を有効成分として含有する癌の予防又は治療剤。
[2]前記癌が、βIIIチューブリンを発現する癌である、[1]に記載の癌の予防又は治療剤。
[3]前記癌が、下記式(1)で計算されるKL1/Tau比が1以上である癌である、[1]又は[2]に記載の癌の予防又は治療剤。
KL1/Tau比=(癌組織におけるKatanin−like 1(KL1)タンパク質の発現量/正常組織におけるKL1タンパク質の発現量)/(癌組織におけるTauタンパク質の発現量/正常組織におけるTauタンパク質の発現量) …(1)
[4]前記癌が、乳癌、唾液腺癌又は大腸癌である、[1]〜[3]のいずれかに記載の癌の予防又は治療剤。
[5][1]〜[4]のいずれかに記載の癌の予防又は治療剤、及び薬学的に許容される担体を含有する、癌の予防又は治療用医薬組成物。
1実施形態において、本発明は、配列番号1に記載のアミノ酸配列からなるペプチド若しくはその誘導体、又は配列番号1に記載のアミノ酸配列において1若しくは複数個のアミノ酸が欠失、置換若しくは付加されたアミノ酸配列からなり、かつ微小管結合活性を有するペプチド若しくはその誘導体、を有効成分として含有する癌の予防又は治療剤を提供する。本明細書において、癌の予防又は治療とは、正常細胞の癌化を抑制すること、発症した癌の進行を遅らせること等を含む。
KL1/Tau比=(癌組織におけるKL1タンパク質の発現量/正常組織におけるKL1タンパク質の発現量)/(癌組織におけるTauタンパク質の発現量/正常組織におけるTauタンパク質の発現量) …(1)
1実施形態において、本発明は、上述した癌の予防又は治療剤、及び薬学的に許容される担体を含有する、癌の予防又は治療用医薬組成物を提供する。
1実施形態において、本発明は、配列番号1に記載のアミノ酸配列からなるペプチド若しくはその誘導体、又は配列番号1に記載のアミノ酸配列において1若しくは複数個のアミノ酸が欠失、置換若しくは付加されたアミノ酸配列からなり、かつ微小管結合活性を有するペプチド若しくはその誘導体の有効量を、治療を必要とする患者に投与する工程を含む、癌の予防又は治療方法を提供する。
(乳癌組織におけるKL1タンパク質とTauタンパク質の発現量の検討)
市販されている、ヒト女性乳癌組織及び隣接正常組織の組織ライセート・ストリップアレイ(5症例:乳管癌、Proteus Biosciences社)を使用した。
(Tauノックダウンによる微小核形成の検討)
ヒト培養正常乳腺上皮細胞(HMEC、型式「CC−2251」、ロンザ社)に、Tauに対するsiRNA(センス鎖の塩基配列を配列番号6に示し、アンチセンス鎖の塩基配列を配列番号7に示す。以下、「siTau」という場合がある。)、KL1に対するsiRNA(型式「siRNA smart pools」、Dharmacon社、以下、「siKL1」という場合がある。)、p53に対するsiRNA(センス鎖の塩基配列を配列番号8に示し、アンチセンス鎖の塩基配列を配列番号9に示す。以下、「sip53」という場合がある。)、対照としてのノンターゲッティングコントロールsiRNA(以下、「Ctrl」という場合がある。)、上記siTauに非感受性のTau発現ベクター(Tau rst.mt)、対照としての空の発現ベクター(mock)、NAPペプチド(Biorbit社)を様々な組み合わせで導入し、全細胞に対する抗セントロメア抗体染色陽性の微小核を有する細胞の割合(%)を測定した。
(Tauノックダウンによる紡錘体への影響の検討)
ヒト培養正常乳腺上皮細胞(HMEC、型式「CC−2251」、ロンザ社)に、上述したCtrl、siTau、siKL1又はNAPを様々な組み合わせで導入し2日間処理した。続いて、MG132(セルシグナリングテクノロジー社)処理により細胞を分裂期に同調させた。続いて、定法(例えば、Sillje H.H. and Nigg E.A.Purification of mitotic spindles from cultured human cells., Methods, 38, 25-28, 2006.を参照。)により、各細胞から微小管成分のみにより構成される分裂期紡錘体を単離し、遠心分離(1500×g、15分間)による物理ストレスを加え、液体低融点アガロースゲルと共にガラスボトムディッシュに添加して撹拌後固化した。続いて、紡錘体の構造的強度を評価した。
(Tauノックダウンによる核型への影響の検討)
ヒト培養正常乳腺上皮細胞(HMEC、型式「CC−2251」、ロンザ社)に、上述したsip53単独、又はsip53及びsiTauを導入し3日間処理した。
Claims (4)
- 配列番号1〜5のいずれかに記載のアミノ酸配列からなるペプチド、配列番号1に記載のアミノ酸配列からなるペプチドにおいて全てのアミノ酸をD−アミノ酸に置換したペプチド、配列番号2に記載のアミノ酸配列からなるペプチドにおいてN末端をアセチル化したペプチド、配列番号2に記載のアミノ酸配列からなるペプチドにおいてC末端をアミノ化したペプチド、配列番号2に記載のアミノ酸配列からなるペプチドにおいてN末端をアセチル化しC末端をアミノ化したペプチド、又は、配列番号5に記載のアミノ酸配列の全てのアミノ酸をD−アミノ酸に置換したペプチドを有効成分として含有する、βIIIチューブリンを発現し且つ下記式(1)で計算されるKL1/Tau比が1以上である癌の予防又は治療剤。
KL1/Tau比=(癌組織におけるKatanin−like 1(KL1)タンパク質の発現量/正常組織におけるKL1タンパク質の発現量)/(癌組織におけるTauタンパク質の発現量/正常組織におけるTauタンパク質の発現量) …(1) - 配列番号1に記載のアミノ酸配列からなるペプチドを有効成分として含有する、請求項1に記載の癌の予防又は治療剤。
- 前記癌が、乳癌、唾液腺癌又は大腸癌である、請求項1又は2に記載の癌の予防又は治療剤。
- 請求項1〜3のいずれか一項に記載の癌の予防又は治療剤、及び薬学的に許容される担体を含有する、癌の予防又は治療用医薬組成物。
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