JP2011031054A - 石灰化を軽減するための生物学的組織の処理方法 - Google Patents
石灰化を軽減するための生物学的組織の処理方法 Download PDFInfo
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Abstract
組織の石灰化を阻害する。
【解決手段】この方法は、生物学的組織を処理溶液に接触させて配置する工程、相対的
な組織/溶液運動を起こす工程、および処理溶液を加熱する工程を包含する。この相対的
運動を起こすには、組織が処理溶液に浸漬されている容器を振とうするか、または容器内
の溶液を攪拌する。この運動を起こすにはまた、処理溶液を、処理する組織を通して流し
ても良い。組織は処理容器内で自由に動き得、または大きく動かないようにされ得る。流
れはレザバを有する循環システムの一部であり得、ヒーターが設けられており、これによ
ってレザバ内の処理溶液を加熱する。
【選択図】図1
Description
動の相対的処理を用いた、哺乳動物身体内に移植するための保存生物学的組織(例えば、
ウシ心膜)の調製方法に関する。
、このような組織を保存するかまたは固定する数多くの方法を包含する。これまでに外科
移植に利用されている生物学的組織のタイプの例としては、心臓弁、血管組織、皮膚、硬
膜、心膜、靭帯、および腱が挙げられる。
ない。しかし、石灰化率に影響を与えると考えられる因子が挙げられる:
a)患者の年齢
b)現存する代謝障害
(すなわち、カルシウム過剰血症、糖尿病、腎不全)
c)食事因子
d)人種
e)感染
f)非経口カルシウム投与
g)脱水
h)歪曲/機械的因子
i)外科移植後の初期期間の不適当な凝固療法;および
j)宿主組織化学
哺乳動物身体内への移植後の組織の石灰化を阻害するための、固定された生物学的組織
の処理方法は、哺乳動物身体内への移植後のこのような組織の使用可能な寿命を実質的に
増加させる傾向があり、それ故、次の組織の取換えの必要性を軽減させる。当業者が理解
するように、このような組織の取換えは、しばしば患者に実質的な外傷を引き起こし、時
には、患者の死を招く。このように、移植された生物学的組織の取換えの必要性を避ける
かまたは延期することのいずれかが可能なことは、大いに有益である。
要性が未だ残っている。
本発明の他の利点と同様にこれらは、以下の記載および図面からより明白にされる。示され、かつ記載された特定の構造の変化は、本発明の精神から逸脱することなく本請求項の範囲内でなされ得ることが理解される。
添付した図に関連して下記に示される詳細な説明は、本発明の現在好ましい実施態様の
説明として意図され、そして本発明が構築され得るかあるいは利用され得る唯一の形態を
表すことは意図されない。この説明は、図示された実施態様に関連して、本発明を構築ま
たは実行するための工程の機能および順序を示す。しかし、本発明の精神および範囲内に
含まれることも意図される異なる実施態様によって、同様または同等の機能および順序が
成し遂げられ得ることが、理解されるべきである。
ヒド固定化生物学的組織を処理するための1つの方法を図2に図示する。図2は、本発明
の現在好ましい実施態様のフローチャートを描く。図1は、哺乳動物身体内への移植用の
生物学的組織を調製するための先行技術方法のフローチャートを描く。
れる(12)。
(熱を用いた組織処理)
ここで、図2について言及すれば、哺乳動物身体内への移植後の生物学的組織の石灰化を阻害するための、グルタルアルデヒド固定化生物学的組織の処理のための方法は、好ましくはグルタルアルデヒドが生物学的組織と接触している時、約4〜22週間、より好ましくは22週間以内の数日間、約35〜75℃に加熱するさらなる工程を含む。
(相対的組織/流体運動を用いた組織処理)
図3は、本発明の組織処理システム20の好ましい実施態様を図示する。1片あるいはそれ以上の組織22あるいはリーフレットが、閉じた容器25内の処理溶液24に浸漬される。容器25は振とうテーブル26上にあり、これはベース27に対して1方向あるいはそれ以上に、往復運動する。1つの特に好ましいタイプの振とう装置は、オービタルシェイカー(orbitalshaker)である。1つの例示の実施態様において、オービタルシェイカー26はほぼ55 RPMの回転速度で作動される。容器25およびその内容物は、図示するような放射ヒーター28のようなもので加熱される。もちろん、容器25を加熱するためのたくさんの方法が公知であり、例えば抵抗ヒーター、対流などである。
(相対的組織/流体流れを用いた組織処理)
図6は、処理システム40の他の変形を概略的に示し、これは、容器の振とうまたは組織が入っている流体の撹拌に対して、組織を通過する流れを利用する。この流れが処理溶液と組織との間に相対的運動を生じさせ、これが、有利な石灰化軽減効果をもたらすと信じられている。
(フローカラム装置)
図8はフローカラム60の斜視図であり、これは図6に概略的に示したフロー容器42の置換物であり得る。カラム60は好ましくは透明なアクリルチューブ61であり、内径約6インチ(15.2cm)、高さ約6フィート(1.8 m)、および容積約10ガロン(38 l)である。シリンダー60の上端および下端はそれぞれキャップ62aおよび62bで閉じられ、これらはO−リング(図示せず)によりシリンダー60の内表面に密着されている。キャップ62bの中央にある下方入り口取付具64は導管を提供し、これによって処理溶液をシリンダー60の下端に導入する。同様に、キャップ62aに接続された上方取付具66は、処理溶液用の出口を提供する。ある長さのホース68によって下方取付具64がポンプ70に接続され、これが次にホース72によって流体レザバ74に接続される。循環処理システムがある長さのホース76によって完成され、これは上方固定具66をレザバ74に接続する。流体連結および必要条件を当業者は理解し、これらは本明細書ではさらに述べない。
(ラット皮下試験)
図12および13は、様々な方法で処理し、ラットに数ヶ月間皮下移植し、取り出した組織から測定したカルシウム捕捉の結果である。これらのグラフは、熱処理のみのものはコントロールと比べてカルシウム捕捉が減少すること、および熱および運動で処理したものはさらにカルシウム捕捉が減少することを示す。多数の振とう、撹拌または運動装置を2つの異なる温度で用い、同様な、一般的な結果が得られた。
24 処理溶液
25 容器25
30 組織処理システム20
40 組織処理システム20
Claims (17)
- 哺乳動物身体内への移植後の生物学的組織の石灰化を阻害するために、処理された生物学的組織を製造する方法であって、以下の工程:
取得した生物学的組織を固定溶液中で固定する工程;
該固定された生理学的組織を、容器中の溶液に入れる工程;
該固定した生物学的組織を、該容器中で45〜55℃の温度で熱処理する工程;および
熱処理の間、該容器を少なくとも30分間の反復運動に供する工程
を包含する、方法。 - 請求項1に記載の方法であって、アルコール、ホルムアルデヒドおよびTween80を含む溶液に、前記生物学的組織を浸漬する工程
をさらに包含する、方法。 - 請求項2に記載の方法であって、ここで、アルコール、ホルムアルデヒドおよびTween80を含む溶液に、生物学的組織を浸漬する工程が、該組織を滅菌するために実施される、方法。
- 請求項3に記載の方法であって、アルコール、ホルムアルデヒドおよびTween80を含む溶液に、生物学的組織を浸漬する工程が、室温で、2時間に亘って実施される、方法。
- 請求項1に記載の方法であって、前記時間が、4〜22週間の範囲である、方法。
- 請求項1に記載の方法であって、前記時間が、14日間〜2ヶ月の範囲である、方法。
- 請求項1に記載の方法であって、前記時間が、30日間〜60日間である、方法。
- 請求項1に記載の方法であって、前記生物学的組織が、50℃±1℃の範囲の温度で熱処理される、方法。
- 請求項1に記載の方法であって、前記生物学的組織が、生理学的溶液およびグルタルアルデヒド溶液からなる群より選択される溶液中で熱処理される、方法。
- 請求項9に記載の方法であって、前記生物学的組織が、グルタルアルデヒド溶液中で処理され、
該溶液が、以下:
a)26ml/lグルタルアルデヒド;
b)4.893g/l HEPES緩衝液
c)2.65g/l MgCl2・6H2O;
d)4.71g/l NaCl;
を含み、そして
e)残りが二重濾過されたH2Oであり、ここで、
該方法は、該溶液のpHを7.4に調整する工程をさらに包含する、
方法。 - 請求項1に記載の方法であって、前記容器を反復運動に供する工程が、該容器を振とうする工程を包含する、方法。
- 請求項1に記載の方法であって、前記容器を反復運動に供する工程が、前記溶液を回転する工程を包含する、方法。
- 前記容器を反復運動に供する工程が、該容器を、回転するフェリス−ホイール(ferris-wheel)装置上に置く工程を包含する、請求項12に記載の方法。
- 前記容器を反復運動に供する工程が、該容器を、軌道振とう器上に置く工程を包含する、請求項11に記載の方法。
- 前記容器を反復運動に供する工程の間、前記容器内で、前記浸漬された組織を動かないようにする工程をさらに包含する、請求項1に記載の方法。
- 前記容器中の溶液が固定化溶液である、請求項1に記載の方法。
- 前記容器中の溶液がグルタルアルデヒドである、請求項1に記載の方法。
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- 1998-05-18 AU AU75748/98A patent/AU7574898A/en not_active Abandoned
- 1998-05-18 JP JP50246799A patent/JP3433949B2/ja not_active Expired - Lifetime
- 1998-05-18 WO PCT/US1998/010017 patent/WO1998056432A1/en active IP Right Grant
- 1998-05-18 EP EP98923456A patent/EP0988069B1/en not_active Expired - Lifetime
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EP0988069A1 (en) | 2000-03-29 |
DE69809738D1 (de) | 2003-01-09 |
JP2006043468A (ja) | 2006-02-16 |
US5931969A (en) | 1999-08-03 |
DE69809738T2 (de) | 2003-08-21 |
JP2004136098A (ja) | 2004-05-13 |
ATE228376T1 (de) | 2002-12-15 |
JP2000512889A (ja) | 2000-10-03 |
AU7574898A (en) | 1998-12-30 |
CA2293474A1 (en) | 1998-12-17 |
BR9810252A (pt) | 2000-09-19 |
US6210957B1 (en) | 2001-04-03 |
JP5300154B2 (ja) | 2013-09-25 |
EP0988069B1 (en) | 2002-11-27 |
JP3764084B2 (ja) | 2006-04-05 |
JP3433949B2 (ja) | 2003-08-04 |
WO1998056432A1 (en) | 1998-12-17 |
JP2002179501A (ja) | 2002-06-26 |
CA2293474C (en) | 2003-07-29 |
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