JP3976190B2 - 間葉系幹細胞を神経細胞に分化させる方法 - Google Patents
間葉系幹細胞を神経細胞に分化させる方法 Download PDFInfo
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Description
Brustleら著、1999年発行、Science 285:754-756 Soriaら著、2000年発行、Diabetes 49:157-162 McDonaldら著、1999年発行、Nat. Med. 5(12): 1410-1412 Kuznetsovら著、1997年発行、Br. J. Haematol. 97:561 Van den Bosら著、1997年発行、Human Cell 10:45 Pittenger MFら著、1999年発行、Science 284:143 Ferrari G.ら著、1998年発行、Science 279:1528 Sanchez-Ramos著、2000年発行、Exp. Neurology 164:247-256 Dale Woodbury著、2000年発行、J. Neuro. Res. 61:364-370 Melissaら著、1999年発行、Exp. Neurology 158:265-278 Hamanoue Mら著、1996年発行、J. Neurosci. Res. 43:554-564 Ebens Aら著、1996年発行、Neuron 17:1157-1172 Fleur Daveyら著、2000年発行、Mol. Cell Neurosci. 15:79-87
健康なボランティアのそれぞれの骨盤(pelvis)から骨髄約10mlを採取してヘパリンを含有するガラス管に貯蔵した。骨髄10mlにリン酸塩緩衝食塩水(PBS)30mlを加え、生成した混合液20mlをフィコール−パキュープラス溶液(Ficoll-Paque(登録商標)plus solution, 1.077g/ml, Amersham Pharmacia Biotech)10ml上に徐々に移動させた後、2000rpmで20分間密度勾配遠心分離(density gradient centrifugation)した。最上層とフィコール−パキュープラス層の間の界面にある単核細胞層を回収し、1800rpmで5分間遠心分離して単核細胞を得た。
実施例1で得られた単核細胞を基本培地を含む培養フラスコに1×106細胞/cm2の密度で接種した。フラスコを37℃、5%CO2で培養した。4時間後、フラスコを新しい基本培地で洗浄して付着しなかった細胞を除去した。前記基本培地としては、ヒドロコルチゾン(hydrocortisone, Sigma)3.5μM、脂肪酸−欠乏ウシ血清アルブミン(fatty acid-free bovine serum albumin, Gibco BRL)と同一のモル比で混合した50ng/mlのリノール酸(linoleic acid, Sigma Co.)、0.1μM CuSO4・5H2O(Sigma)、50pM ZnSO4・7H2O(Sigma)、3ng/ml H2SeO3(Sigma)、1.05mg/ml NaHCO3(Sigma Co.)、1.19mg/ml HEPES(Sigma)、100U/mlペニシリン(Gibco BRL)、10mg/mlストレプトマイシン(Gibco BRL)および25μg/mlアムホテリシン(Gibco BRL)を含むウィリアムズE培地(Williams' E medium, Gibco BRL)を用いた。
実施例2で得られた単核細胞が神経細胞に分化するかを確認するために、単核細胞を上皮細胞成長因子(Gibco BRL)10ng/ml、塩基性線維芽細胞成長因子(R&D Systems)20ng/mlおよび肝細胞成長因子(R&D Systems)20ng/mlを含む基本培地(「分化培地」)で37℃、5%CO2で培養した。分化培地は一週間に2回ずつ入れ替えた。
EGF、bFGFおよびHGFを含む培地で8週間培養することにより、骨髄の単核細胞から分化した、実施例3で得られた神経細胞を1cm2カバーガラス上に1×104細胞/cm2の密度で付着した。細胞を0.1Mリン酸塩緩衝液(phosphate buffer)で5分間洗浄し、4%パラホルムアルデヒドを含む0.1Mリン酸塩緩衝液で15分間固定し、0.1Mリン酸塩緩衝食塩水(PBS)で2回洗浄した。この細胞を1%BSAと0.2%Triton X−100を含む0.1M PBSで5分間処理した後、一次抗体、すなわち、マウス抗−ヒトニューロン−特異的エノラーゼ(NSE)(Chemicon Inc.)、マウス抗−ヒトニューロン−特異的核タンパク質(NeuN)(Chemicon Inc.)、マウス抗−ヒトβ−チューブリンIII(Sigma Co.)およびマウス抗−ヒト神経膠繊維性酸性タンパク質(GFAP)(Sigma Co.)抗体と16時間反応させた。
骨髄の単核細胞中の間葉系幹細胞が神経細胞に分化するかどうかを確認するために、単核細胞を培養し、それから間葉系幹細胞を分離した。間葉系幹細胞の各種細胞への分化能を次のように調査した。
実施例5で分離された間葉系幹細胞が神経細胞に分化できるかを調査するために、間葉系幹細胞を実施例3の方法に従ってEGF、bFGFおよびHGFを含む培地で8週間培養した。
Claims (7)
- 間葉系幹細胞を上皮細胞成長因子(EGF)、塩基性線維芽細胞成長因子(bFGF)および肝細胞成長因子(HGF)を含む培地で培養することを含む、間葉系幹細胞を神経細胞に分化させる方法。
- 間葉系幹細胞を1〜1000ng/mlのEGF、1〜1000ng/mlのbFGFおよび1〜1000ng/mlのHGFを含む培地で1週間以上培養する請求項1記載の方法。
- 培養を4週間以上行う請求項2記載の方法。
- 間葉系幹細胞をEGF、bFGFおよびHGFを含む培地で1週間以上培養した後、生成した分化神経細胞をEGFおよびbFGFを含む培地で増殖させる請求項1記載の方法。
- 間葉系幹細胞がヒトの骨髄から分離されたものである請求項1記載の方法。
- 骨髄から分離され、間葉系幹細胞を含む単核細胞を間葉系幹細胞の供給源として用いる請求項1記載の方法。
- 神経細胞がニューロン(neuron)および星状膠細胞(astrocyte)を含む請求項1記載の方法。
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EP (1) | EP1379627B1 (ja) |
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JP2004527250A (ja) | 2004-09-09 |
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EP1379627B1 (en) | 2008-08-06 |
DE60228067D1 (de) | 2008-09-18 |
CN100535106C (zh) | 2009-09-02 |
KR100449141B1 (ko) | 2004-09-21 |
EP1379627A1 (en) | 2004-01-14 |
KR20020082239A (ko) | 2002-10-31 |
US7229827B2 (en) | 2007-06-12 |
WO2002086108A1 (en) | 2002-10-31 |
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