JP2011020001A - 眼用器具及び関連した方法及び組成物 - Google Patents
眼用器具及び関連した方法及び組成物 Download PDFInfo
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Abstract
【解決手段】架橋コラーゲンを含んでなる光学的に透明かつ移植可能な生合成組成物であって、前記架橋コラーゲンは、1−エチル−3−(3−ジメチルアミノプロピル)カルボジイミド及びN−ヒドロキシスクシンイミドを使用してコラーゲン重合体を架橋するプロセスによって製造され、当該組成物は5%(w/w)から50%(w/w)の間のある量のコラーゲンを含む組成物。
【選択図】なし
Description
本願は、2004年8月13日付申請の米国仮出願No. 60/601,270の利点を主張し、その全ての内容は、ここに、参照することにより本書に援用される。
したがって、個人の視力を向上させるために、生体適合性があり、眼用に許容でき、かつ眼の中に置いておくことに適する材質がまだ必要とされる。
上記器具の材質は、一つ以上の細胞成長エンハンサー物質または一つ以上の追加の生体高分子をも有し得る。
本発明のさらなる利点及び態様は、以下の詳細な説明、図面、実施例、及び特許請求の範囲から明らかになる。
当業者には周知のことだが、未水和状態では、器具中のコラーゲンの量は水和状態よりも多いパーセント率となり得る。
本明細書で開示された眼用器具は、適当な方法または技術を用いて眼の中に装着することできる。
コラーゲンを基にした角膜オンレイの調製
通常、水性緩衝液に溶解した0.5 mL〜2.0 mLのコラーゲン溶液を水性緩衝液に溶解した0.01 mL〜0.50 mの架橋剤に約0°Cで気泡を閉じ込めないようにして混合した。ある組成物の場合には、コラーゲン以外の第二の生体高分子を組成物に添加した。
細胞成長エンハンサー物質をもつ眼用器具
ペンタペプチド(YIGSR、ラミニン高分子中の活性ユニット)単体、または上皮の健康、EGF、NGF、FGFまたはこれらの分子の一部を促進する、IKVAV、相乗的なIGF、及び物質Pペプチドを含むものなど相乗作用をもつペプチドと結合したペンタペプチドなどの細胞成長エンハンサー物質は、第二のEDC−NHS反応性生体高分子をもつものも含めてコラーゲン/EDC−NHS、架橋された器具のどれにでも組み込むことが可能である。YIGSRについては、この細胞成長エンハンサー物質の結合は、当物質のチロシン残基の遊離アミン末端基の反応性を介して達成され得る。未結合の細胞成長エンハンサー物質を除去するために、ゲル化後に拡張的な抜き取り処理を行ってもよい。
眼用器具の具体的な製剤法の詳細については、以下の実施例3〜13及び表2で説明する。
MES緩衝液中でpH5.5の状態で、1−エチル−3−(3−ジメチルアミノプロピル)カルボジイミド(EDC)とN−ヒドロキシスクシンイミド(NHS)+コラーゲンを使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cで15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。
MES緩衝液中でpH5.5の状態で、COP + EDC-NHS + コラーゲンを使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cで15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。[COP、共重合体、ポリ(N−イソプロピルアクリルアミド−co−アクリル酸)を70°C、窒素下で1,4−ジオキサンと2,2’−アゾビス−イソブチロニトリル開始剤中でNiPAAmとAAcの遊離基重合によって調製した]。
MES緩衝液中でpH5.5の状態で、EDC-NHS + コンドロイチン硫酸C(ChS)+ コラーゲンを使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cで15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。
MES緩衝液中でpH5.5の状態で、コラーゲン + EDC-NHS + N,O−カルボキシメチルキトサン(CMC)を使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cで15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。
MES緩衝液中でpH5.5の状態で、コラーゲン + EDC-NHS + N,O−カルボキシメチルキトサン(CMC)を使用して、2時間かけて0°C〜4°Cから21°Cに上げて、+ PBS中キトサン(1%水溶液、5000Da)にゲルを4時間浸漬時の第二の架橋を行い、眼用器具を実施例1に述べたとおりに製造した。最後に37°Cで15時間経過させた。EDC:NHS=モル当量比1:1。
コラーゲン + EDC-NHS + ヒアルロン酸(HA)を使用して、MES緩衝液中でpH5.5で、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cで15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。
MES緩衝液中でpH5.5の状態で、コラーゲン + EDC-NHS + コンドロイチン硫酸(ChS)+ ヒアルロン酸(HA)を使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cに上げて15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。
MES緩衝液中でpH7〜8の状態で、コラーゲン + ヒアルロン酸アルデヒド(HA−CHO)+ 水酸化シアノホウ素ナトリウムを使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cで15時間かけて、眼用器具を実施例1に述べたとおりに製造した。HA−CHOは、21°C2時間の過ヨウ素酸ナトリウム(0.05 g)との酸化的開裂によりHA(0.1 g)から調製した。水溶液を2日間、水に対して透析した。
MES緩衝液中でpH5.5の状態で、コラーゲン + EDC-NHS + アルギン酸塩を使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cに上げて15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。
MES緩衝液中でpH5.5の状態で、グルタルアルデヒド(水にて1%に希釈した"Glut")+ コラーゲンを使用して、2時間かけて0°C〜4°Cから21°Cに上げて、+ PBS中キトサン(1%水溶液、5000Da)にゲルを4時間浸漬時の第二の架橋を行い、眼用器具を実施例1に述べたとおりに製造した。モールド中のゲルは、PBS下で取り出す前に37°Cに上げて15時間に放置した。
MES緩衝液中でpH5.5の状態で、コラーゲン + EDC-NHS + キトサンを使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cで15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。
MES緩衝液中でpH7〜8の状態で、EDC-NHS + コンドロイチン硫酸C(ChS)+ コラーゲンを使用して、15時間かけて0°C〜4°Cから21°Cに上げて、その後37°Cで15時間かけて、眼用器具を実施例1に述べたとおりに製造した。EDC:NHS=モル当量比1:1。
実施例3〜14のすべての器具は、以下の表2に示した市販のコラーゲンと反応物質との比率のすべてで、丈夫で、透明で柔軟性のあるゲルであった。
オンレイ用途のヒドロゲルのいくつかは、DSC、光学的透明度及び屈折率、測定、張力特性(剛性、最大抗張力、破断点伸び、表2)及びin vivoの性能によって特徴付けられた。すべての試料についての反応後のゲルに対するDSC測定から、コラーゲンの架橋と相応して、変性温度の増加とΔHdenatureの減少が見られた。表2のすべての製剤の屈折率は、1.341〜1.349の範囲内であった。
in vitroのオンレイ性能(表2)
上皮細胞(人の不死化角膜上皮細胞、HCEC)がいかにヒドロゲル上で集合体まで成長するか(集合体へ成長するまでの日数)を評価するために、HCEC細胞がいかにヒドロゲル上に積層するかを評価するために、並びにヒドロゲル上での及びヒドロゲル内への幼い後根神経節の神経成長を評価するために(後者は、データが得られた場合、ミクロン/日として報告した)、Li et al. PNAS 100:15346-15351 (2003)により開示れた方法を使用した。
人の角膜は、完全な除去後3〜5日でその上皮を復元する。
*別途指示ない限り、厚さ500 μm、直径12 mmの埋込み片。Li et al. PNAS 100:15346-15351 (2003)により開示された縫合引き抜き方法からの応力、ひずみ及び剛性データ。
**ゲル上: DRGから神経突起がヒドロゲル上へ成長した。ゲル内:神経突起が6日間でヒドロゲル内へ明示された長さまで成長した。
in vivoのオンレイ性能
オンレイを実施例1に述べたとおりに調製した。第一の組のオンレイは、10%(w/v)の豚のコラーゲンとEDC/NHSから調製した。第二の組のオンレイは、3.5%(w/v)のウシ属のコラーゲンとコンドロイチン硫酸(CSC)及びEDC/NHSから調製した。各オンレイは、直径約6 mm、中央の厚さ約70 μm、及び 30 μmの傾斜エッジを有した。
オンレイを移植するために、ブタの上皮を、30〜45秒間、45%のエタノールで処理した。上皮に蝶形の切り込みをつけ、ポケットを形成した。視覚化のためにオンレイを細胞毒性のない染料(Gel-CodeTM)で青く染めた。予め染めたオンレイをポケットに挿入した。保護用コンタクト・レンズを目の上に縫合した。
角膜オンレイの切除
VISX Star S4 エキシマー・レーザーを使用して、コラーゲン/EDC及びコラーゲン/キトサンのオンレイを切除した(表3)。PAR角膜トポグラフィー・システム(CTS)による処理の前後に表面トポグラフィー測定値を取得した。この処理のために、オンレイを保存溶液から取り出して、PMMAからなる球面の上に置いた。
光線治療角膜切除(PTK)手術は、均一の数のレーザーパルス(またはエネルギー)を切除ゾーン全域に照射する。光屈折角膜切除(PRK)手術は、所望の曲率変更を得るために切除ゾーン中でパルス密度を変動させる。AZDは、切除ゾーンの直径を意味する。深さは、レーザー製造者により報告された、人の角膜に対する処理の予測深さである。
眼用器具はまた、ウレタンのような強度増強コンポーネントを有してもよい。
人の組み換えコラーゲン眼用器具
FibroGen(サンフランシスコ、CA)から入手した13.7 wt%の人の組み換えコラーゲン・タイプI、0.3 mlと 0.625 M モルホリノエタンスルホン酸(MES)、0.3 mlを本明細書で説明した注射器を基にしたシステムを使用して混合することにより、架橋されたコラーゲンのヒドロゲルを調製した。混合を氷水槽の中で行うことにより、混合は低下した温度で発生した。
ここで、W0及びWは、乾燥した試料と膨張した試料のそれぞれの重量を示す。
本実施例では、pH変化をモニターする助けに、pH指示薬をMES緩衝液に添加した。本実施例で使用された特定の指示薬は、アリザリン・レッドS(Sigma Aldrich)である。
コラーゲン−ポリ(NIPAAm−co−AAC)組成物
本明細書で説明したEDC/NHS架橋方法(実施例4)により、組成物を調製した。開始時のコラーゲン濃度は15%であった。最終コラーゲン濃度は11%であった。最終ポリ(NIPAAm−co−AaC)濃度は3%であった。ゲル中の総固体濃度は14%であった。
当ヒドロゲル材質は、種付け後7日で角膜上皮細胞が合流することを実証した。
コラーゲン/コンドロイチン硫酸組成物
コラーゲンIとプロテオグリカン相当物としてコンドロイチン硫酸(CSC)を使用して、高い光学的透明度と抗張力をもつ生合成マトリックスを開発した。光学的透明度を失わせる可能性がある凝固またはコラーゲン線維形成を伴わずに、コラーゲンに対する乾燥重量比30%(wt/wt)までのCSCを有するヒドロゲルを制御された条件の下で調製した。当ヒドロゲルを物理的に及び生化学的に特性を明らかにした。in vivoの試験は、人の角膜上皮細胞(HCECs)がゲルの表面でよく成長し、うまく積層されたことを示した。当マトリックスは、健全な神経成長を担持した。同様の結果もin vivoで得られた。
膨潤率=(WW − Wd)/Wd
ここで、WWは水和したゲルの重量であり、Wdは乾燥ゲルの重量である。
タイプIIIコラーゲン組成物
材質。人の組み換えタイプIIIコラーゲン(5.1% w/w FibroGen Inc)、0.625 M モルホリノエタンスルホン酸[MES、アリザリン・レッドS、pH指示薬(6.5 mg/100ml水)を含む]、1−エチル−3−(3−ジメチル・アミノプロピル)カルボジイミドHCl(EDC)、N−ヒドロキシ・スクシンイミド(NHS)。
Claims (31)
- 架橋コラーゲンを含んでなる光学的に透明かつ移植可能な生合成組成物であって、
前記架橋コラーゲンは、1−エチル−3−(3−ジメチルアミノプロピル)カルボジイミド及びN−ヒドロキシスクシンイミドを使用してコラーゲン重合体を架橋するプロセスによって製造され、
当該組成物は5%(w/w)から50%(w/w)の間のある量のコラーゲンを含む組成物。 - 白色光透過率が少なくとも85%である、請求項1に記載の組成物。
- 前記架橋はゼロ長の結合である、請求項1又は2に記載の組成物。
- 前記架橋プロセスにおけるpH値は6.0未満に維持され、
前記コラーゲン重合体、1−エチル−3−(3−ジメチルアミノプロピル)カルボジイミド及びN−ヒドロキシスクシンイミドは、高剪断力下で混合される、請求項1〜3のいずれか一項に記載の組成物。 - 前記架橋プロセスにおけるpH値は5.0〜5.5の間に維持される、請求項4に記載の組成物。
- 前記架橋プロセスにおけるpH値はpHサージが起こらないように維持される、請求項4に記載の組成物。
- 前記コラーゲンの量は、少なくとも6%(w/w)である、請求項1〜6のいずれか一項に記載の組成物。
- 前記コラーゲンの量は、少なくとも10%(w/w)である、請求項1〜6のいずれか一項に記載の組成物。
- 前記コラーゲンの量は、10%(w/w)から30%(w/w)の間にある、請求項1〜6のいずれか一項に記載の組成物。
- 前記コラーゲンの量は、10%(w/w)から24%(w/w)の間にある、請求項1〜6のいずれか一項に記載の組成物。
- 前記架橋コラーゲンは一つのタイプのコラーゲンを含んでなる請求項1〜6のいずれか一項に記載の組成物。
- 前記架橋コラーゲンは二つ以上のタイプのコラーゲンを含んでなる請求項1〜6のいずれか一項に記載の組成物。
- 細胞成長エンハンサー物質をさらに含んでなる、請求項1〜6のいずれか一項に記載の組成物。
- 前記細胞成長エンハンサー物質はペプチドである、請求項13に記載の組成物。
- 前記ペプチドは、RGD、YIGSR、またはIKVAVのアミノ酸配列を有する、請求項14に記載の組成物。
- 前記細胞成長エンハンサー物質は、神経栄養因子、神経成長因子、及び上皮成長因子からなるグループから選択される、請求項13に記載の組成物。
- 前記細胞成長エンハンサー物質は組成物中に均一に分散される、請求項16に記載の組成物。
- 前記コラーゲンは器具の唯一の水膨潤性の重合体である、請求項1〜6のいずれか一項に記載の組成物。
- 前記コラーゲンは酸性pH条件下で架橋されている、請求項1に記載の組成物。
- 前記酸性pHは5.0から5.5の間にある、請求項19に記載の組成物。
- 前記架橋コラーゲンは、アテロコラーゲン、タイプIコラーゲン、タイプIIIコラーゲン、またはこれらの組合せを含んでなる、請求項1〜6のいずれか一項に記載の組成物。
- 前記架橋コラーゲンは組み換えコラーゲンを含んでなる、請求項1〜6のいずれか一項に記載の組成物。
- 前記架橋コラーゲンは動物から分離されたコラーゲンを含んでなる、請求項1〜6のいずれか一項に記載の組成物。
- ポリ(N−イソプロピルアクリルアミド−co−アクリル酸)、コンドロイチン硫酸、N,O−カルボキシメチルキトサン、ヒアルロン酸、ヒアルロン酸アルデヒド、またはアルギン酸塩をさらに含んでなる請求項1〜6のいずれか一項に記載の組成物。
- 組成物上の及び/または組成物内への神経成長を促進するのに効果がある、請求項1〜24のいずれか一項に記載の組成物。
- 請求項1から25のいずれか一項に記載の組成物を製造する方法であり、
コラーゲン重合体を、酸性pH条件下で1−エチル−3−(3−ジメチルアミノプロピル)カルボジイミド及びN−ヒドロキシスクシンイミドと混合するステップと、
前記混合物を硬化して、架橋コラーゲンを含んでなる組成物を形成するステップと
を含んでなる方法。 - 前記混合ステップは、上記混合物にかかる高いせん断力を生み出すように構成されたシステムの中で、コラーゲン重合体と架橋剤を混合することを含む、請求項26に記載の方法。
- 前記混合は0°Cから5°Cの間のある温度で行われる、請求項26に記載の方法。
- 細胞成長エンハンサー物質を前記化合物に添加するステップをさらに含む、請求項26に記載の方法。
- 請求項1から25のいずれか一項に記載の組成物を含む、治療を必要とする患者の眼の疾患、病気、または損傷を治療するための眼用器具。
- 請求項1から25のいずれか一項に記載の組成物を含む角膜器具であって、
当該角膜器具は、角膜上皮に隣接又は接触するように角膜内部に埋め込まれ、前記角膜器具における前記角膜上皮に隣接又は接触する面を迅速に上皮細胞が被覆し、かつ、当該器具内への神経の迅速な成長が促進される、角膜器具。
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TW200628133A (en) | 2006-08-16 |
CA2577025C (en) | 2014-01-28 |
US20080269119A1 (en) | 2008-10-30 |
KR101298442B1 (ko) | 2013-08-22 |
CA2577025A1 (en) | 2006-02-23 |
BRPI0514349A (pt) | 2008-06-10 |
KR20070060077A (ko) | 2007-06-12 |
EP1776148A1 (en) | 2007-04-25 |
TW200618824A (en) | 2006-06-16 |
EP1776148A4 (en) | 2011-08-17 |
US20060134170A1 (en) | 2006-06-22 |
TWI288630B (en) | 2007-10-21 |
EP1791499A2 (en) | 2007-06-06 |
CA2576308C (en) | 2015-06-30 |
WO2006015490A1 (en) | 2006-02-16 |
WO2006020859A2 (en) | 2006-02-23 |
CN101018513A (zh) | 2007-08-15 |
WO2006020859A3 (en) | 2007-01-25 |
KR20070053217A (ko) | 2007-05-23 |
CN101132818A (zh) | 2008-02-27 |
EP1776148B1 (en) | 2019-03-06 |
JP2008509748A (ja) | 2008-04-03 |
EP1791499A4 (en) | 2011-08-17 |
JP2008508959A (ja) | 2008-03-27 |
CN101018513B (zh) | 2011-11-16 |
TWI388349B (zh) | 2013-03-11 |
CA2576308A1 (en) | 2006-02-16 |
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