JP5612801B2 - 上皮幹細胞の増殖方法 - Google Patents
上皮幹細胞の増殖方法 Download PDFInfo
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- JP5612801B2 JP5612801B2 JP2001577863A JP2001577863A JP5612801B2 JP 5612801 B2 JP5612801 B2 JP 5612801B2 JP 2001577863 A JP2001577863 A JP 2001577863A JP 2001577863 A JP2001577863 A JP 2001577863A JP 5612801 B2 JP5612801 B2 JP 5612801B2
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Description
本発明は、上皮幹細胞および縁部(limbal)幹細胞の疲弊症、より具体的には、上皮幹細胞疲弊症の例えば角膜表面再建術におけるこの問題を治療するための方法および移植片に関する。
眼に関しては、正常な眼球表面は角膜、縁部および結膜上皮によって覆われている。それらの明確に区分された細胞表現型は、安定な眼球前方の涙液膜と一緒になって眼表面の完全な状態を維持している。化学火傷または熱傷、スティーヴンス−ジョンソン症候群、眼の瘢痕性類天疱瘡、縁部領域における度重なる外科手術および凍結療法、コンタクトレンズ装着および重篤な微生物感染に起因する重篤な縁部上皮損傷が、縁部および上皮幹細胞疲弊症の原因となりうる。縁部上皮幹細胞疲弊症は通常、角膜表面上への結膜内生(conjunctivalization)、血管新生、慢性炎症および線維内生ならびに角膜混濁として現れる。
本発明の一実施態様では、健康な眼から微小な縁部生検により、および培養で得られた縁部幹細胞および上皮細胞を特別に処理した羊膜上で増殖させる。基質としてこのような羊膜を用いることは、炎症を起こしていない縁部間質を修復し、縁部幹細胞および上皮幹細胞集団を増殖させることに役立つ。得られる「製品」を擦過した角膜表面に移植片として移植し、続いて表面角膜切除(heretectomy:ヘレテクトミィ)によって線維血管性内生を除去することができる。眼以外の損傷身体領域の場合には、健康な上皮細胞の生検は、同一または類似した生物学的/組織学的特性を有する、すなわち損傷した領域と組織適合性のある隣接した組織領域から行う。
縁部生検は健康な眼で行い、その眼は、患者の他眼であっても別の生体からであってもよい。瞼をBetadine(登録商標)(プルビドン(prvidone)−ヨード)で消毒する。無菌条件の下で、上皮細胞および角膜間質組織の一部を含む縁部組織1から2mm2を縁部縁から分離し、No.66 Beaver(登録商標)ブレード(Becton Dickinson、Franklin Lakes、NJ)による層状角膜切除により表面の角膜間質から切除する。この組織を、1ml当たり0.5%DMSO(ジメチルスルホキシド)、2ugマウスEGF(上皮成長因子)、1ugウシインスリン、0.1ugコレラ毒素および5%ウシ胎仔血清を追加したDMEM(ダルベッコの改良イーグル培地)およびHamのF12(1:1の比)を有する培地1.5mlの入った35mmの皿に入れ、無菌の層流フード中で培養するため、直ちに実験室に送った。
Claims (10)
- レシピエント部位に被着される手術用移植片であって、前記移植片は、
羊膜細胞と完全な状態を有する細胞外マトリックスとからなる羊膜と、そして
培地中で処理された組織に由来し、次いで前記羊膜に移されることによって、前記羊膜上で増殖した角膜の上皮幹細胞とからなり、
前記増殖の前に前記羊膜細胞は死滅しているが、前記細胞外マトリックスの前記完全な状態が維持されていることを特徴とする手術用移植片。
- 前記羊膜は基底膜面を有し、
前記上皮幹細胞が前記基底膜面上で増殖することを特徴とする請求項1に記載の手術用移植片。
- 健康な眼で行われる縁部生検からの縁部組織が前記上皮幹細胞源であることを特徴とする請求項1または2に記載の手術用移植片。
- 前記羊膜は基底膜面を有し、
前記上皮幹細胞が培地中で処理された組織に由来し、次いで前記羊膜に移され、
前記上皮幹細胞が前記羊膜の前記基底膜面上でex vivoに培養されることを特徴とする請求項1に記載の手術用移植片。
- 前記上皮幹細胞源は、レシピエント部位に対して生物学的および組織適合性である健康な部位から採取された生検による組織であることを特徴とする前記請求項1乃至4のいずれかに記載の手術用移植片。
- 損傷したレシピエント部位のための手術用移植片を作成する方法であって、前記方法は、
a)羊膜細胞と完全な状態をもつ細胞外マトリックスを有する羊膜上に角膜の上皮幹細胞を含んだ生検を外植片として配置するステップと、そして
b)前記角膜の上皮幹細胞を前記羊膜上で増殖させるステップとを含み、
前記増殖の前に、前記羊膜細胞は死滅しているが、前記細胞外マトリックスの前記完全な状態が維持されていることを特徴とする手術用移植片を作成する方法。
- 前記羊膜は基底膜面を有し、
前記配置する前記ステップは、前記基底膜面上に前記外植片をマウントするステップを有することを特徴とする請求項6に記載の手術用移植片を作成する方法。
- 前記マウントするステップにおいて、増殖した前記上皮幹細胞は損傷したレシピエント部位に対し表が上になるように配置されることを特徴とする請求項7に記載の手術用移植片を作成する方法。
- 増殖させる前記ステップは、前記羊膜をその外植片と共に、前記上皮幹細胞が直径2から3cmの面積まで増殖するのに十分な時間培養することを特徴とする前記請求項6に記載の手術用移植片を作成する方法。
- 前記移植片を外科的にレシピエント部位に固定した後で前記羊膜から前記外植片を取り除くことを特徴とする前記請求項6に記載の手術用移植片を作成する方法。
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CN100436577C (zh) * | 2003-02-06 | 2008-11-26 | 赛尔斯德株式会社 | 前眼部相关细胞片、三维结构体、及它们的制造方法 |
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JP4576545B2 (ja) * | 2004-05-27 | 2010-11-10 | 独立行政法人理化学研究所 | 羊膜由来因子による胚性幹細胞の培養方法 |
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CN101102800A (zh) * | 2005-01-14 | 2008-01-09 | 阿如布勒斯特有限公司 | 使用羊膜的片状组合物及其制作方法 |
JP4863655B2 (ja) | 2005-06-17 | 2012-01-25 | 国立大学法人 東京医科歯科大学 | 細胞含有シート |
TWI407967B (zh) * | 2006-04-28 | 2013-09-11 | Ray Jui Fang Tsai | 人類角膜內皮幹細胞之擴增方法 |
CN102166375B (zh) * | 2011-02-16 | 2013-04-10 | 中国海洋大学 | 一种组织工程人角膜上皮的重建方法 |
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