JP6533253B2 - 封入薬物組成物およびその使用方法 - Google Patents
封入薬物組成物およびその使用方法 Download PDFInfo
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- JP6533253B2 JP6533253B2 JP2017111242A JP2017111242A JP6533253B2 JP 6533253 B2 JP6533253 B2 JP 6533253B2 JP 2017111242 A JP2017111242 A JP 2017111242A JP 2017111242 A JP2017111242 A JP 2017111242A JP 6533253 B2 JP6533253 B2 JP 6533253B2
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Description
本明細書で使用する「治療効果」という用語は、ヒト患者もしくは動物患者の病理学的症状、疾患の進行、または、例えば、再狭窄などの障害に関連する生理学的状態、もしくはそれに対する抵抗性の改善をもたらす、向上させる、または他に引き起こす効果を意味する。薬物に関して使用する「治療有効量」という用語は、ヒト患者または動物患者に治療効果を付与する薬物の量を意味する。
本開示の一態様は、少なくとも1種の薬物と少なくとも1種の賦形剤とを含む組成物に関する。特定の実施形態では、薬物と賦形剤は、薬物対賦形剤の重量比10:1〜1:10で存在する。他の実施形態では、薬物と賦形剤は、薬物対賦形剤の重量比1:2〜1:5、または1:1〜1:5で存在する。さらに他の実施形態では、薬物と賦形剤は、賦形剤が薬物を封入して、封入薬物の微粒子を形成するような重量比で存在する。
本発明の他の態様は、賦形剤により封入された少なくとも1種の薬物を含む粒子状コーティングを含む放出可能な成分を組み込む医療用デバイスに関する。賦形剤は、例えば、以下に限定されるものではないが、EGCGまたはタンニン酸などのガレート含有化合物などの、上記に開示した化合物の1つであってもよい。特定の実施形態では、医療用デバイスは、上記に開示した賦形剤または組成物でコーティングされているか、または他の方法でそれらを含有する。
パクリタキセルとタンニン酸をパクリタキセル対タンニン酸の比1:2でバルーンカテーテルにコーティングする。バルーンにコーティングする最終目標用量はバルーン1つ当たり約1,300μg、または約1.5μg/mm2である。
コーティングされたバルーンからブタ外腸骨内への薬物の取り込みを試験するために、フローループ試験を行う。フローループの準備は以下の通りである。ブタ外腸骨から過剰な脂肪および組織を除去し、それを長さ約6cmに切断する。翌日試験するために外腸骨を冷蔵庫で終夜保存した。
バルーン送達および展開の様々な段階におけるバルーンカテーテルからの薬物損失量を試験するために耐久性試験を行う。折り畳み中、膨張部位への送達中、および膨張時の薬物損失を試験する。折り畳みによる薬物損失を試験するために、バルーンをコーティングし、自然に収縮させて折り目を再形成し、真空引きし、バルーン上にバルーンカバーを配置する。滴下コーティング法またはスプレーコーティング法を用い、実施例1に記載の一般的な方法に従ってコーティングを行う。約24時間後、バルーンカバーを取り外し、バルーンを膨張させる。次いで、バルーンを容器に入れ、100%エタノールで洗浄する。バルーン上に残存する薬物の量をHPLCで定量する。
Claims (16)
- 表面を有する基部構造と、
前記表面上のコーティングであって、実質的に薬物および賦形剤からなるコーティングと
を含む医療用デバイスであって、
前記薬物と前記賦形剤とが10:1〜1:10の重量比で存在し、前記賦形剤が、エピガロカテキンガレート、タンニン酸、およびエピカテキンガレートからなる群から選択され、該賦形剤が、当該医療用デバイスが患者の体内に取り付けられたときに該医療用デバイスからの前記薬物の放出速度を増加させるのに有効な量で存在している、医療用デバイス。 - 前記薬物が再狭窄抑制剤である、請求項1に記載の医療用デバイス。
- 前記賦形剤が、エピガロカテキンガレート、タンニン酸からなる群から選択される、請求項1に記載の医療用デバイス。
- 前記賦形剤がタンニン酸である、請求項3に記載の医療用デバイス。
- 前記賦形剤がエピガロカテキンガレートである、請求項3に記載の医療用デバイス。
- 前記再狭窄抑制剤が、免疫抑制剤、増殖抑制剤、微小管安定剤、平滑筋細胞抑制剤、および哺乳類ラパマイシン標的阻害剤からなる群から選択される、請求項2に記載の医療用デバイス。
- 前記薬物が、シロリムス(ラパマイシン)、ピメクロリムス、タクロリムス、エベロリムス、ゾタロリムス、ノボリムス(novolimus)、ミオリムス(myolimus)、テムシロリムス(temsirolimus)、デフォロリムス、およびバイオリムスからなる群から選択される、請求項1に記載の医療用デバイス。
- 前記薬物が、パクリタキセルである、請求項1に記載の医療用デバイス。
- 前記パクリタキセルが、非晶質パクリタキセル、パクリタキセル二水和物、無水結晶性パクリタキセル、およびこれらのうちの少なくとも2種の混合物からなる群から選択される、請求項8に記載の医療用デバイス。
- 前記パクリタキセルが、非晶質および結晶の形態で存在する、請求項8に記載の医療用デバイス。
- 当該医療用デバイスがバルーンである、請求項1に記載の医療用デバイス。
- 当該医療用デバイスがステントである、請求項1に記載の医療用デバイス。
- 当該医療用デバイスが、ステント、脈管用ステント、尿管用ステント、カテーテル、バルーン、バルーンカテーテル、ステントグラフト、ワイヤガイド、およびカニューレからなる群から選択される、請求項1に記載の医療用デバイス。
- 前記薬物が、2種以上の多形体として存在する、請求項1に記載の医療用デバイス。
- 前記薬物が水不溶性薬剤である、請求項1に記載の医療用デバイス。
- 外表面を有するバルーンと、
前記外表面上のコーティングであって、実質的にパクリタキセルおよび賦形剤からなり、前記パクリタキセルと前記賦形剤とが10:1〜1:10の重量比で存在し、前記パクリタキセルが非晶質および結晶の形態で存在し、前記賦形剤が、エピガロカテキンガレートおよびタンニン酸からなる群から選択される、コーティングと、
を含む医療用デバイスであって、
前記賦形剤が、当該医療用デバイスが患者の体内に取り付けられたときに該医療用デバイスからの前記薬物の放出速度を増加させるのに有効な量で存在している、医療用デバイス。
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