JP5560570B2 - 創傷治療用医薬組成物 - Google Patents
創傷治療用医薬組成物 Download PDFInfo
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- JP5560570B2 JP5560570B2 JP2009042671A JP2009042671A JP5560570B2 JP 5560570 B2 JP5560570 B2 JP 5560570B2 JP 2009042671 A JP2009042671 A JP 2009042671A JP 2009042671 A JP2009042671 A JP 2009042671A JP 5560570 B2 JP5560570 B2 JP 5560570B2
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Description
また、コラーゲンは一般にブタ、ウシなどの動物由来であり、感染性物質の混入のリスクが否定できない。
[1]アミノ酸配列がHyp−Glyで表されるジペプチドまたはその薬理学的に許容される誘導体を含有することを特徴とする、創傷治療のための医薬組成物。
[2]経口、皮下または経皮により投与されることを特徴とする、[1]に記載の医薬組成物。
[3]前記ペプチドまたはその誘導体の含有量が0.1〜50重量%である、[1]または[2]に記載の医薬組成物。
[4]前記ペプチドまたはその誘導体の含有量が0.5〜10重量%である、[1]または[2]に記載の医薬組成物。
[5]剤形が、クリーム剤、ゲル剤、軟膏剤、液剤、粉剤、塗布剤、乳剤、噴霧剤、滴剤、散剤、貼付剤またはドレッシング剤である、[1]〜[4]のいずれかに記載の医薬組成物。
[6]さらに、止血活性物質、成長因子、抗感染物質、鎮痛物質および抗炎症物質からなる群より選択される一種類以上を含む、[1]〜[5]のいずれかに記載の医薬組成物。
Hyp−Glyは、固相ペプチド合成法、液相ペプチド合成法などの、一般的なペプチド合成法によって得られる。また、ブタ、ウシ、馬などの動物由来コラーゲンを、希塩酸、希硫酸などの酸性溶液、もしくは水酸化ナトリウム溶液、水酸化カリウム溶液などのアルカリ溶液などで加水分解することによってもHyp−Glyジペプチドを得ることができる。このようにして得られたHyp−Glyジペプチドを含む混合物は、ゲルろ過などの一般的な方法により、Hyp−Glyジペプチドを精製することが望ましい。
ここで、担体としては薬理学的に許容されるものであればよいが、可溶化剤、pH調整剤、賦形剤、保存剤、乳化剤、防腐剤、色素、矯味矯臭剤、増粘剤などが例示される。
用いられるものであれば種類を問わない。例えば、ポリビニルアルコール、グリセロール、キトサン、カルボキシメチルセルロース、コラーゲン、ヒアルロン酸、ポリプロピレングリコールなどが挙げられる。
ここで、止血活性物質としては、プロトロンビン、トロンビン、フィブリノーゲン、フィブリン、フィブロネクチン、ヘパリナーゼが例示される。
また、成長因子としては、上皮細胞増殖因子(EGF)、トランスフォーミング増殖因子(TGF)、線維芽細胞増殖因子(FGF)、血管内皮細胞増殖因子(VEGF)、血小板由来増殖因子(PDGF)が例示される。
また、抗感染物質としては、クロラムフェニコール、マクロライド、キノロン、β−ラクタム、テロラサイクリン、サルファ剤が例示される。
また、鎮痛物質としては、アスピリン、アミノピリン、アセトアミノフェン、エテンザミドが例示される。
また、抗炎症物質としては、オキシベンゾン、トラネキサム酸及びその誘導体、イプシロンアミノカプロン酸、グリチルリチン酸、アズレン、塩酸ジフェンヒドラミン、アミノカプロン酸が例示される。
Hyp−Glyジペプチド又はその誘導体は、医薬組成物中に0.1〜50重量%の割合で含まれることが好ましく、0.5〜10重量%の割合で含まれることがより好ましい。本発明の創傷治療用医薬組成物は、経口、皮下または経皮などの方法により投与することができる。
投与量は創傷の大きさや重傷度などに応じて適宜設定することができる。
細胞遊走性試験
5週齢のBALB/cマウス(雄)の腹部の皮膚を、3mmのディスクに切り取って、DMEM(Dulbecco's Modified Eagle's Medium)中に採取した。その後、24穴のプラスチックプレートに移し、584μg/mLのL−グルタミン、0.01mg/mLのゲンタマイシン、200nmol/mLの検体(Hyp−Glyジペプチド、Pro−HypジペプチドまたはPro−Hyp−Glyトリペプチド)を含むDMEMを加え、37℃、5容量%炭酸ガス存在下に置いた。その後、マウス皮膚のディスクから1mm以上の距離を遊走した線維芽細胞の数を24時間ごとに顕微鏡により測定した。
結果を図1に示す。図1より、ペプチドを加えないコントロールに比べ、ペプチドを加えたディスクでは細胞遊走促進効果が高いことが分かる。
細胞増殖試験
BALB/cマウスの腹部の皮膚を6−7mm程の幅に培養皿(直径75mm)に切り採り、584μg/mLのL−グルタミン、0.01mg/mLのゲンタマイシン、10容量%のFBS(ウシ胎児血清)を含む8mLのDMEMを加え、37℃、5容量%炭酸ガス存在下で培養した。培養の間、2日ごとに培地を交換し、2週間後に皮膚を取り除き、線維芽細胞を0.25%トリプシン−EDTA溶液で剥離回収した。これを、584μg/mLのL−グルタミン、0.01mg/mLのゲンタマイシン、10容量%のFBS、および、200nmol/mLの検体(Hyp−Glyジペプチド、Pro−HypジペプチドまたはPro−Hyp−Glyトリペプチド)を含むDMEMを加えて5×104
個/mLとなるように調製し、予め作成しておいたコラーゲンゲル(96穴のプラスチックプレートに、0.5%のコラーゲン溶液を含むDMEM100μLを加えて、37℃、5容量%炭酸ガス存在下で静置して調製)に播種し、37℃、5容量%炭酸ガス存在下で培養した。144時間培養した後、Cell Counting Kit−8(同仁化学)を用いて450nmの吸光度を測定することにより細胞数を計測した。
結果を図2に示す。これより、コラーゲンゲル上で、Hyp−Glyジペプチドは、線維芽細胞の増殖を促進することが分かる。
マウスを用いた創傷治療効果の評価
皮膚の全層欠損創傷治癒の実験用としてICRマウス雌(8週齢)を予備飼育した。ペントバルビタール麻酔下でマウスの背部を剪毛し、エタノールで清拭後、背部正中部に生検トレバンφ3mmにて全層欠損創を4箇所作製し、面積を測定した。創面に、最終濃度2%の検体(Hyp−GlyジペプチドまたはPro−Hyp−Glyトリペプチド)と7.5%ポリビニルアルコールを含む溶液10μLを滴下投与した後、防水絆創膏(ニチバン
シアテープ)をはり、周りを瞬間接着剤で密閉した。3日の後、マウスを安楽死させ、創傷部の面積を測定した。各ペプチドを用いたときの、創傷の縮小面積を図3に示した。図3より、コントロール(ペプチドなし)やPro−Hyp−Glyトリペプチドに比べ、Hyp−Glyジペプチドは、創傷の縮小に効果を示すことが分かる。
Claims (6)
- アミノ酸配列がHyp−Glyで表されるジペプチドを含有し、経皮により投与されることを特徴とする、創傷治療のための医薬組成物。
- 剤形が、クリーム剤、ゲル剤、軟膏剤、液剤、粉剤、塗布剤、乳剤、噴霧剤、滴剤、散剤、貼付剤またはドレッシング剤である、請求項1に記載の医薬組成物。
- アミノ酸配列がHyp−Glyで表されるジペプチドを含有し、剤形が、塗布剤、貼付剤またはドレッシング剤である、創傷治療のための医薬組成物。
- 前記ジペプチドの含有量が0.1〜50重量%である、請求項1〜3のいずれか一項に記載の医薬組成物。
- 前記ジペプチドの含有量が0.5〜10重量%である、請求項1〜3のいずれか一項に記載の医薬組成物。
- さらに、止血活性物質、成長因子、抗感染物質、鎮痛物質および抗炎症物質からなる群より選択される一種類以上を含む、請求項1〜5のいずれか一項に記載の医薬組成物。
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