JP2007517581A - 線維芽細胞で占められた代用結合組織の調製 - Google Patents
線維芽細胞で占められた代用結合組織の調製 Download PDFInfo
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Abstract
Description
以下、本発明は、本発明の実施形態を単に例証するために示され、それをいかなる方法においても限定しない以下の実施例、及び本発明に従った代用真皮組織の調製のための方法の実施形態を表す図1によって説明される。
Euro Skin Bank (Beverwijk, The Netherlands)からのグリセロール保存されたヒト死体皮膚は、カルシウム及びマグネシウムフリーのリン酸緩衝生理食塩水(PBS)中で洗浄された。死体皮膚は、カルシウム及びマグネシウムフリーのペニシリン(100IU/ml)及びストレプトマイシン(100μg/ml)含有PBS中で、37℃で1週間インキュベートされた(この週の間カルシウム及びマグネシウムの無いペニシリン及びストレプトマイシン含有PBSは、3度取替えられた)。表皮はブラントな金属スパチュラを用いて穏やかに擦り取られ、生きた細胞の実質的に無い真皮層及びその乳頭表面に接着した基底膜を無傷で残すことが出来た。基底膜を含む真皮層はカルシウム及びマグネシウムの無いペニシリン及びストレプトマイシン含有PBS中で6ヶ月間まで、4℃でそれが使用されるまで保存された。
3mmの完全な厚みの皮膚パンチバイオプシーは、被験体から無菌的条件下で、例えば太ももなどの光老化されていない皮膚の健康な領域から取られた。そうするために、その皮膚領域は最初にクロルヘキシジン溶液(水の中に1%)を用いて洗浄され、乾燥させられた。平方センチメートル毎の創傷を閉鎖するために、3mmのバイオプシーが得られた。
実施例1において得られた真皮層は、それが適用される創傷にフィットするようにカットされ(1cm×2cm)培養培地I(ダルベッコの改良MEM培地(DMEM)/Hams F12(3:1)、1% ultroserG(Biosepra S.A., Cergy-Saint-Christophe, France)、10−7Mインスリン、10−6Mヒドロコルチゾン、10−6Mイソプレテロノール(isopreteronol)、100 IU/mlペニシリン、4ng/mlKGF及び1ng/mlEGF含有100μg/mlストレプトマイシン)中で終夜インキュベートされた。
バイオプシーから表皮層を除去した後、残存する真皮はHankの緩衝塩溶液(2.5mlディスパーゼタイプII、75mgコラゲナーゼ及び7.5ml Hankの溶液;フィルター滅菌された)中の0.5mlのディスパーゼ/コラゲナーゼ中37℃で2時間インキュベートされた。次いで2mlの線維芽細胞培地(1%ultroserG(Biosepra S.A.、Cergy-Saint-Christophe, France)、100 IU/mlペニシリン、及び100μg/mlストレプトマイシン含有DMEM)が添加され、消化された真皮は6分間1100rpmで遠心分離された。ペレットは2mlの線維芽細胞培地中に再懸濁され、組織培養0.4μm孔サイズのトランスウェル(Costar)に移された。線維芽細胞は40〜60%コンフルエンスまで7〜9日間線維芽細胞培地中で細胞培養トランスウェル中で培養された。培地は4日目及び必要に応じて7日目に取替えられた。
表皮層、基底膜及び生きた細胞の実質的に無い真皮層の層状アセンブリは、細胞培養トランスウェル中で培養された線維芽細胞上に空気に接触している表皮層を上向きにして配置され、結果物は培養培地II中で更に7〜14日間増殖された。KGF及びEGFは真皮層上の表皮シートの端から表皮が3〜5mm拡張するまで培養培地II中に維持され、次いで除かれた。従って、2〜3週間の全培養期間の後、増殖している表皮は第二接触面上で真皮層(それに接着した基底膜を有する)を完全に覆い、線維芽細胞は代用真皮組織を得るために真皮中に移動した。この増殖期間の間、培養培地IIは週に二回取替えられた。ペニシリン及びストレプトマイシンは可能性のある悪い薬剤反応を回避するために、最後の培地更新から省かれた。
被験体1
71歳の男性被験体は、静脈うっ滞下腿潰瘍を6ヶ月よりも長く患った。潰瘍は約1cm×2cmであり、周りの皮膚は炎症していた。
73歳の女性被験体は二つの静脈うっ滞下腿潰瘍を6ヶ月よりも長く患った。潰瘍は両方各約2cm2であり周囲の皮膚は炎症していた。
50歳の男性被験体は10ヶ月間かかとに褥瘡を有した。その創傷は約3cm2であった。
78歳の女性被験体は14年より長い間1つの静脈うっ滞下腿潰瘍を患った。潰瘍は約130cm2であった。
Claims (24)
- 代用結合組織のin vitro増殖のための方法であって、前記代用結合組織は線維芽細胞で占められ(populated)、以下の工程を含む:
a)第一及び第二接触面を有する生きた細胞の実質的に無い結合組織層を供給する工程(該第一接触面は該第二接触面と対向している);
b)線維芽細胞を含む容器中に該結合組織層を配置し、該線維芽細胞を該結合組織層の該第一接触面に接触させる工程;及び
c)工程b)と少なくとも一時的に同時に、該結合組織層(該結合組織層は該容器中に配置されている)の該第二接触面を、前記結合組織層の該第一接触面を通過することによって前記線維芽細胞を該結合組織層中に誘引するための環境を提供する走化性因子と接触させる工程。 - 線維芽細胞を含む該容器が線維芽細胞を含む細胞培養皿又はトランスウェルである、請求項1に記載の方法。
- 該結合組織層の該第二接触面が該容器からの線維芽細胞と実質的に接触しないように維持される、請求項1又は2のいずれかに記載の方法。
- 該線維芽細胞が初代細胞培養物である前記請求項のいずれかに記載の方法。
- 環境を提供する前記走化性因子が1つ以上の走化性因子を含む培地によって供給される、前記請求項のいずれかに記載の方法。
- 該環境における少なくとも1つの走化性因子が上皮細胞由来である、前記請求項のいずれかに記載の方法。
- 環境を提供する前記走化性因子が上皮細胞を含む、前記請求項のいずれかに記載の方法。
- 該上皮細胞がケラチノサイトを含む、請求項7に記載の方法。
- 該上皮細胞が表皮細胞である、請求項6〜8のいずれかに記載の方法。
- 環境を提供する前記走化性因子が無傷の上皮層を含む、前記請求項のいずれかに記載の方法。
- 該無傷の上皮層が無傷の表皮層である、請求項10に記載の方法。
- 該上皮細胞、ケラチノサイト、又は無傷の上皮層が前記被験体由来である、請求項6〜11のいずれかに記載の方法。
- 該上皮細胞、ケラチノサイト、又は無傷の上皮層が前記被験体の1つ以上の皮膚バイオプシーから得られる、請求項6〜12のいずれかに記載の方法。
- 該結合組織層の該第二接触面が基底膜を含む、前記請求項のいずれかに記載の方法。
- 該線維芽細胞が前記被験体の1つ以上の皮膚バイオプシーから得られる、前記請求項のいずれかに記載の方法。
- 該線維芽細胞、該上皮細胞、ケラチノサイト、又は無傷の上皮層が前記被験体由来である、前記請求項のいずれかに記載の方法。
- 1つ以上のヌクレオチド配列を該線維芽細胞、上皮細胞、ケラチノサイト、及び/又は無傷の上皮層に導入する工程を更に含む、前記請求項のいずれかに記載の方法。
- 前記生きた細胞の実質的に無い結合組織層がドナー生物由来であり、前記被験体が前記ドナー生物でない、前記請求項のいずれかに記載の方法。
- 請求項1〜18のいずれかの方法によって得られ得る代用結合組織。
- 請求項19に記載の代用結合組織を創傷上に適用する工程を含む、創傷の閉鎖のための方法。
- 該創傷が慢性創傷又は急性創傷である、請求項20に記載の方法。
- 該慢性創傷が静脈潰瘍、動脈潰瘍、糖尿病性潰瘍、褥瘡および持続性火傷から成る群から選択される、請求項21に記載の方法。
- 該急性創傷が外科創傷、不慮の創傷、褥瘡および火傷から成る群から選択される、請求項21に記載の方法。
- 前記創傷上に請求項19に記載の代用結合組織を適用することを含む、創傷を被っている被験体を治療するための方法。
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