JP2005287479A - 組織幹細胞採取方法及びそれを利用した装置 - Google Patents
組織幹細胞採取方法及びそれを利用した装置 Download PDFInfo
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Abstract
【解決手段】生体組織から穿刺針を用いて採取した組織片から特定の組織幹細胞を得る際、閉鎖系で
(1)細孔径200〜300μmフィルターに通過させることで組織片から血球成分を除去する工程、
(2)抗生物質を含有したリン酸緩衝液で洗浄する工程、
(3)得られた組織片に酵素処理を施し細胞懸濁液とする工程、
(4)比重の軽い細胞を浮かせることで目的の細胞と分離させる工程、
(5)その目的の細胞の懸濁液を再び、細孔径250〜300μmフィルターを通過させる工程、
(6)さらに細孔径20〜40μmフィルターに通過させる工程、
(7)遠心分離、及びまたは400〜500nmフィルターを通過させることで細胞懸濁液より目的の細胞を得る工程、を経ること。
【選択図】 なし
Description
(1)細孔径250〜300μmフィルターに通過させることで組織片から血球成分を除去する工程、
(2)抗生物質を含有したリン酸緩衝液で洗浄する工程、
(3)得られた組織片に酵素処理を施し細胞懸濁液とする工程、
(4)比重の軽い細胞を浮かせることで目的の細胞と分離させる工程、
(5)その目的の細胞の懸濁液を再び、細孔径250〜300μmフィルターを通過させる工程、
(6)さらに細孔径8〜25μmフィルターに通過させる工程、
遠心分離、及びまたは450〜500nmフィルターを通過させることで細胞懸濁液より目的の細胞を得る工程、を経ることを特徴とする組織幹細胞採取方法を提供する。
また、本発明は、その組織幹細胞採取方法を利用した組織幹細胞採取装置を提供する。
以下に本明細書において特に使用される用語の定義を列挙する。
本実施例では、まず、本実験に対して同意を示したヒトから細胞を脂肪組織から調整した。局所麻酔(1%Eキシロカインを生食で4倍に希釈した液を使用)後、14G針を装着したテルモ社製50ccシリンジに約20ccの生理食塩水を装てんし、約20ccの脂肪吸引を行った。
次に、実施例1において調整した細胞中の細胞を初代培養し、継代培養した後に成熟脂肪細胞へと分化させた。具体的にはコンフルエントまで増殖させた組織幹細胞を含む細胞を脂肪細胞分化用培地で2日おきに処理した。分化開始日と2日目には、0.5mM IBMX、1μMデキサメタゾン、1μMトリグリタゾン、5μg/mlインスリンを含んだ 10% CCS−DMEM培地で処理した。4日目には、トリグリタゾンとインスリンを含んだ 10% CCS−DMEM培地で、6日目以降は、500ng/mlインスリンを含んだ 10% CCS−DMEM培地で処理した。得られた結果を図2を示す。
実施例1で用いた細胞群に対して、脂肪細胞以外の細胞に分化することを確かめた。神経細胞への分化は20%血清添加したDMEM培地に1mMのベータ・メルカプトエタノールを加えて24時間培養して、翌日、PBSで二回洗浄した後に血清無添加DMEM培地に5mMのベータ・メルカプトエタノールで培養した(Woodbury et al.,J Neurosci Res 61;364−370,2000)。
血管内皮への分化は実施例1で得られた細胞を抗PECAM−1抗体にて選択し、VEGFを含んだ培地で培養した。脂肪組織から得られた幹細胞をコラーゲンコートした培養皿の上でVEGF,FGF2,EGFを添加した培地で培養するとこの細胞群の一部が内皮細胞に分化した。別の報告では、この細胞群の3割がCD34陽性細胞、すなわち造血幹細胞(Hematopoietic Stem Cell)の特徴を持つこと、また平滑筋細胞のマーカーであるα−smooth muscle actine陽性細胞にも分化しうることが示されており血管再生に動員されうる細胞群と考えられる。またこの細胞群から血管内皮細胞増殖因子(VEGF)および肝細胞増殖因子(HGF)の分泌量は血管内皮および平滑筋細胞と比較しても極めて高い、血管内皮細胞との共培養系で、内皮細胞の増殖、遊走が有意に促進されることも明らかとなった。近年の骨髄細胞を用いた血管新生の機序として、間葉系幹細胞からの内皮増殖因子の分泌の寄与が重要であるという認識もなされており、いわゆる支持細胞としてもこの細胞群が機能しうることを示唆している。得られた結果を図2を示す。
さらに実施例1の細胞に対して非ウイルスベクターのHVJ−E(センダイウイルス・エンヴェロープベクター、Mol Ther.2001)を用いての遺伝子導入に成功した。今回の発明であるシリンジを用いた採取単離装置では、最終段階の回収システムでHVJ−E(石原産業製GENOME−ONEなど)を用いて遺伝子導入キットを行うことも可能である。
Claims (10)
- 生体組織から穿刺針を用いて採取した組織片から特定の組織幹細胞を得る際、閉鎖系で
(1)細孔径200〜300μmフィルターに通過させることで組織片から血球成分を除去する工程、
(2)抗生物質を含有したリン酸緩衝液で洗浄する工程、
(3)得られた組織片に酵素処理を施し細胞懸濁液とする工程、
(4)比重の軽い細胞を浮かせることで目的の細胞と分離させる工程、
(5)その目的の細胞の懸濁液を再び、細孔径250〜300μmフィルターを通過させる工程、
(6)さらに細孔径20〜40μmフィルターに通過させる工程、
(7)遠心分離、及びまたは400〜500nmフィルターを通過させることで細胞懸濁液より目的の細胞を得る工程、
を経ることを特徴とする組織幹細胞採取方法。 - 生体組織が脂肪組織、肝臓、筋肉である、請求項1記載の組織幹細胞採取方法。
- 特定の組織幹細胞が脂肪組織幹細胞である、請求項1、2いずれか1項記載の組織幹細胞採取方法。
- 細胞がヒトのものである、請求項1〜3いずれか1項記載の組織幹細胞採取方法。
- 請求項1〜4の組織幹細胞採取方法に従う、組織幹細胞採取装置。
- 装置が採取装置と分離装置からなる請求項5記載の組織幹細胞採取装置。
- 採取装置が生体組織から組織片を採取する穿刺針と細細孔径200〜300μmフィルターが装着された注射器様装置である、請求項6記載の組織幹細胞採取装置。
- 分離装置が遠心分離菅の開口側に細孔径200〜300μmフィルターが装着され、その下部に細孔径20〜40μmフィルターが装着され、さらにその下部に細孔径400〜500nmフィルターが装着されたものである請求項6記載の組織幹細胞採取装置。
- 生体組織の脂肪細胞から脂肪組織幹細胞を採取することを目的とした請求項5〜8いずれか1項記載の組織幹細胞採取装置。
- 細胞がヒトのものである、請求項5〜9いずれか1項記載の組織幹細胞採取装置。
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| JPWO2008041370A1 (ja) * | 2006-10-04 | 2010-02-04 | 国立大学法人 東京大学 | Es細胞からの造血前駆細胞を内包する構造物、及び該構造物を用いた血球細胞の調製方法。 |
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| WO2009122747A1 (ja) * | 2008-04-01 | 2009-10-08 | 国立大学法人東京大学 | iPS細胞からの血小板の調製方法 |
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| JP2015506674A (ja) * | 2011-12-07 | 2015-03-05 | サイトベラ, インコーポレイテッド | 試料処理のための方法および装置 |
| CN114606183A (zh) * | 2022-03-17 | 2022-06-10 | 上海坤爱生物科技股份有限公司 | 一种动物源脂肪干细胞分离提取方法 |
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