JP2007505608A - 肝細胞の単離方法 - Google Patents
肝細胞の単離方法 Download PDFInfo
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- JP2007505608A JP2007505608A JP2006526482A JP2006526482A JP2007505608A JP 2007505608 A JP2007505608 A JP 2007505608A JP 2006526482 A JP2006526482 A JP 2006526482A JP 2006526482 A JP2006526482 A JP 2006526482A JP 2007505608 A JP2007505608 A JP 2007505608A
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Abstract
【選択図】 なし
Description
(a)肝切除術中に患者から肝臓組織を回収する工程、及び
(b)前記回収した組織に存在する不要な細胞から正常な肝細胞を磁気分離で単離する工程、
を含む。
(a)肝切除術中に患者から肝臓組織を回収する工程、及び
(b)回収した組織に存在する不要な細胞から正常な肝細胞を磁気分離で単離する工程、
を含む。
本明細書で使用される用語「正常な肝細胞」は、単離されたときに、in situで肝細胞の正常な細胞機能と活性を発揮する能力を保持し、従って肝細胞移植が必要な患者に移植するのに適切である肝細胞を意味する。また、改変された肝細胞、例えば特定の遺伝子産物の発現を調節するように改変されており、それでもなおin situで肝細胞の正常な細胞機能と活性を発揮する能力を実質的に保持している肝細胞も用語「正常な肝細胞」の範囲内と考えられる。
肝臓切除後、次に行う正常な肝細胞と不要な細胞を分離する前に、まず、正常組織を、腫瘍が発症した組織又は他の疾患が発症した組織と肉眼により分離してもよい。
本発明の方法で単離された肝細胞は多くの目的に適している。典型的には、本発明の単離された肝細胞は、肝細胞移植に使用できる。また、単離された肝細胞は、例えば患者の肝機能喪失を補うための人工肝臓サポートシステム及び装置の製造にも使用できる。
肝転移のため肝臓切除を受けた5人の患者から肝細胞を収集した。この研究はオーストラリアのニューサウスウエールズのセントジョージ病院の倫理委員会で承認された(承認番号01/123)。これらの患者の転移の位置及び行われた切除の詳細を表1に示す。
生存肝細胞の収集(実施例1)後、肝細胞を、付随する腫瘍細胞から単離する。Flatmarkらにより開示された免疫磁気法(Clinical Cancer Research 8:444-449, 2002)を使って、MOC31モノクローナル抗体で被覆された超常磁性4.5μmビーズ(Dynabeads M450; Dynal, Oslo, Norway)を用いて腫瘍細胞を単離した。MOC31はEp-CAM抗原を認識し、Ep-CAM抗原は殆どの上皮細胞の表面に存在し、特に結腸直腸癌で高発現する。
MOC31被覆免疫磁気ビーズによる腫瘍細胞の除去(実施例2)後、上皮細胞接着分子(Ep-CAM)遺伝子の発現を検出するRT-PCRを使って、残っている腫瘍細胞について肝細胞の調製物を分析した。Ep-CAMは有用な細胞表面マーカーであり、HT29細胞を含むほとんどの上皮細胞及び腫瘍細胞の表面で発現される。Ep-CAM遺伝子発現に基づく腫瘍細胞の検出におけるRT-PCRの感度は、107個の非腫瘍細胞当たり約10個の腫瘍細胞である(Sakaguchi, Mら, Brit J Cancer 79:416-422, 1999)。
センス鎖:5’-GAACAATGATGGGCTTTATGA-3’
アンチセンス鎖:5’-TGAGAATTCAGGTGCTTTTT-3’
これらのプライマーを使用してEp-CAMのPCR増幅が成功すると、515bpの生成物が作られる。
Claims (23)
- (a)肝切除術中に患者から肝臓組織を回収する工程、及び
(b)前記回収した組織に存在する不要な細胞から正常な肝細胞を磁気分離で単離する工程、
を含む、正常な肝細胞を単離する方法。 - 前記肝切除術を良性又は悪性腫瘍を含む肝臓又はその一部を切除して行う、請求項1に記載の方法。
- 前記肝細胞を磁気分離で単離する工程の前に、前記回収した肝臓組織から腫瘍が発症した肉眼的形跡のある組織を除去する工程を更に含む、請求項2に記載の方法。
- 前記不要な細胞が腫瘍細胞である、請求項1〜3のいずれか1項に記載の方法。
- 前記細胞の磁気分離を抗体で被覆された超常磁性のコロイドを使って行う、請求項1〜4に記載の方法。
- 前記抗体が、前記正常な肝細胞の表面上のエピトープを特異的に認識するモノクローナル抗体である、請求項5に記載の方法。
- 前記抗体が、前記不要な細胞を特異的に認識するモノクローナル抗体である、請求項5に記載の方法。
- (c)肝切除術中に患者から肝臓組織を回収する工程、及び
(d)前記回収された組織に存在する不要な細胞から正常な肝細胞を磁気分離で単離する工程、
を含む、移植用肝細胞の調製方法。 - 前記肝切除術を良性又は悪性細胞を含む肝臓又はその一部を切除して行う、請求項8に記載の方法。
- 前記肝細胞を磁気分離で単離する工程の前に、前記回収した肝臓細胞から腫瘍が発症した肉眼的形跡がある組織を除去する工程を更に含む、請求項9に記載の方法。
- 前記不要な細胞が腫瘍細胞である、請求項8〜10のいずれか1項に記載の方法。
- 前記細胞の磁気分離を抗体で被覆された超常磁性コロイドを使って行う、請求項8〜11のいずれか1項に記載の方法。
- 前記抗体が、前記正常な肝細胞の表面上のエピトープを特異的に認識するモノクローナル抗体である、請求項12に記載の方法。
- 前記抗体が、前記不要な細胞を特異的に認識するモノクローナル抗体である、請求項12に記載の方法。
- 請求項1〜7のいずれか1項に記載の方法で単離された正常な肝細胞。
- 請求項8〜14のいずれか1項に記載の方法で調製された正常な肝細胞。
- 肝疾患に罹患している患者に肝細胞を移植するための、請求項1〜7のいずれか1項に記載の方法で単離された正常な肝細胞又は請求項8〜14のいずれか1項に記載の方法で調製された正常な肝細胞の使用。
- 前記肝疾患が、クリーグラー・ナジャー症候群、ギルバート症候群、デュービン・ジョンソン症候群、家族性高コレステロール血症、オルニチントランスカルバモイラーゼ欠損症、遺伝性肺気腫、血友病、ウイルス性肝炎、肝細胞癌、急性肝不全及び慢性肝不全からなる群から選択される、請求項17に記載の使用。
- 請求項1〜7のいずれか1項に記載の方法で単離された正常な肝細胞又は請求項8〜14のいずれか1項に記載の方法で調製された正常な肝細胞を、肝疾患を治療するのに十分な量で適切な時に患者に投与する工程を含む、患者の肝疾患を治療する方法。
- 前記肝疾患が、クリーグラー・ナジャー症候群、ギルバート症候群、デュービン・ジョンソン症候群、家族性高コレステロール血症、オルニチントランスカルバモイラーゼ欠損症、遺伝性肺気腫、血友病、ウイルス性肝炎、肝細胞癌、急性肝不全及び慢性肝不全からなる群から選択される、請求項19に記載の方法。
- 人工肝臓サポートシステムにおける、請求項1〜7のいずれか1項に記載の方法で単離された正常な肝細胞の使用。
- 切除された肝臓組織の不要な細胞から正常な肝細胞を磁気分離で単離する、前記正常な肝細胞を単離するための、肝切除中に回収され、切除された肝臓組織の使用。
- 切除された肝臓組織の不要な細胞から正常な肝細胞を磁気分離で単離する、移植用肝細胞を調製するための、肝切除中に回収され、切除された肝臓組織の使用。
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PCT/AU2004/001256 WO2005028640A1 (en) | 2003-09-19 | 2004-09-17 | Method for isolating hepatocytes |
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JP5841322B2 (ja) | 2010-04-22 | 2016-01-13 | オレゴン ヘルス アンド サイエンス ユニバーシティ | フマリルアセト酢酸ヒドロラーゼ(fah)欠損性ブタおよびその使用 |
AU2011247984B2 (en) * | 2010-05-07 | 2015-04-30 | University Of North Carolina At Chapel Hill | Method of engrafting cells from solid tissues |
CN102465115B (zh) * | 2010-11-04 | 2014-03-05 | 中国科学院上海生命科学研究院 | 一种新的制备肝实质细胞的方法 |
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US4375407A (en) * | 1981-06-22 | 1983-03-01 | The Franklin Institute | High gradient magnetic separation device |
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