JP2008536511A - CD8T細胞の活性化方法{MethodForActivatingCD8TCells} - Google Patents
CD8T細胞の活性化方法{MethodForActivatingCD8TCells} Download PDFInfo
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Abstract
【選択図】図1
Description
体細胞内に寄生するウイルスの特性の上ウイルスに直接的に治療效果を見せてくれる薬は開発されていることができない。ウイルスが伴う寒気、嘔吐、発熱などを抑制する補助制で症状を緩和した後自然免疫係による治療效果を期待する実情である。
新しい治療剤の一分野として、免疫細胞などを細胞治療剤に用いる方法が研究されており、このような治療法は、特定の個体から分離した免疫細胞を活性化して患者に直接投与する。このような細胞治療法では、APC細胞、特定の抗原などで活性化した細胞を用いた。
本発明のもう一つの目的は、上記の方法にて活性化されたCD8 T細胞を含むウイルス感染疾患を予防又は治療する組成物を提供することにある。
更に他の様態として、本発明は、上記の方法にて活性化されたCD8 T細胞を含むウイルス感染疾患を予防又は治療する組成物に関する。
更に他の様態として、本発明は、上記の方法にて活性化されたCD8 T細胞をウイルス感染された患者に投与して、ウイルス感染疾患を予防又は治療する方法に関する。
本発明において、用語“治療”とは、活性化されたCD8 T細胞の投与により、ウイルス感染による疾患症状が好転したり、有益に変更されるあらゆる行為を意味する。
用語“治療学的に有効な量(therapeutically effective amount)”は、医学的治療に適用可能な合理的な受恵/危険の割合で疾患を治療するに十分な量を意味し、有効量は、疾病の重症度、年齢、性別、投与時間、投与経路及び排出比率、治療期間、同時に使われる薬物を含む要素と、その他医学分野によく知られている要素とによって決定できる。前記要素を全て考慮して、副作用無く、最小限の量で最大の効果が得られる量を投与することが重要であり、当業者により容易に決定することができ、例えば、成人の基準に、1回1mgから1000mgの本発明のCD8 T細胞を投与することができる。
マウス(BALB/c、SLC Japan)の脾臓を取り出して、セル・グラインダー(cell grinder)で破砕した。破砕された細胞を、RPMI培地状態で1500rpmに遠心分離した後、RBC lysing buffer(Sigma、USA)10mlを加えて、常温で10分間反応させた。1500rpmに遠心分離した後、RPMI培地10mlで3回交換して、赤血球を除去した。得られた単核免疫細胞から、抗-CD8 T細胞抗体を使用して、MACS方法を用いて、CD8 T細胞を分離した。分離されたCD8 T細胞を、サイトカイン及び10%FBSを含むRPMI培地に入れて、48時間培養した。
添加されるサイトカインの量は、培地1ml当たり、GM-CSF 0.1μg、IFN-gamma 1μg、TNF-alpha 0.1μg、Lectin 50μg、IL-2 及び0.1μg、IL-4 0.1μgになるようにした。培養された細胞を収集し、これを、PBSに懸濁して、 細胞治療剤に使用した。図1は、個体からCD8 T Cellを分離して活性化する過程を示した模式図である。
1×104のインフルエンザウイルス(Influenza A virus A/PR/8/34; 延世大学校ソングバックリン教授から提供)をマウスに氣管支内で投与して、ウイルス感染を誘発した。実施例1の方法にて活性化したCD8 T細胞を、PBS溶液に1×106になるように懸濁させ、インフルエンザウイルスに感染されたマウスに静脈注射した。
マウスの生存率を、PBSだけを投与した対照郡マウス、細胞株マクロファージ、または、CD4 T細胞を投与した実験郡マウスと比較した(表1)。
ウイルスの感染後、実施例1の方法にて活性化されたCD8 T細胞を処理して生存したマウス郡(6匹)に対して、1×104のインフルエンザウイルスを氣管支内投与して、感染を誘導した後、インフルエンザウイルスが感染されたことがなく、また、PBSだけが投与されたマウスに、上記と同様に、インフルエンザウイルスを投与した対照郡(6匹)との生存率の比較によって、CD8 T細胞の投与によるワクチン効果を見てみた。
細胞治療剤よるワクチン効果を測定するために、細胞治療の後、生存したマウスの血液を分離した。眼球から抽出したマウスの血液は、3000rpmに遠心分離して、血清を収得した。収得された血清に対して、抗原であるサルモネラ菌株に対する特異的な抗体反応の程度を、ELISA技法を使用して確認した。
図4は、活性化されたCD8 T細胞を投与して生存したマウスから収得された血清のサルモネラ菌株に対する抗原抗体反応の結果である。図4によれば、CD8 T Cellにより治療されたマウスの場合、治療しなかったマウスに比べて、7倍程更に敏感なサルモネラに対する抗体反応(total IgG)を示すことが確認できた。同時に、粘膜免疫の指標として使用されるIgMを測定した結果も、正常マウスに比べて、治療されたマウスの場合、抗体反応の程度が上がったことを確認した。これは、細胞治療剤を通じて治療されたマウスから、サルモネラ菌株に対する特異的な抗体反応が誘導され得ることを示すものである。
Claims (7)
- 個体の生物学的試料からCD8 T細胞を分離するステップと、
前記CD8 T細胞を、GM-CSF、IFN-gamma、TNF-alpha、Lectin、IL-2及びIL-4を含むサイトカインを添加した培地で培養するステップと、
を含む、試験管内においてCD8 T細胞を活性化する方法。 - 生物学的試料が、血液(blood)、 血漿(plasma)、リンパ節(lymph node)、脾臓(spleen)、胸腺(thymus)、または、骨髄(bone marrow)である、請求項1に記載の方法。
- サイトカインの濃度が、培地1ml当たり、0.05から0.2μgのGM-CSF、0.5から2μgのIFN-gamma、0.05から0.2μgのTNF-alpha、40から60μgのLectin、0.05から0.2μgのIL-2、及び、0.05から0.2μgのIL-4である、請求項1に記載の方法。
- 前記CD8 T細胞を、1日から4日培養する、請求項1に記載の方法。
- 請求項1に記載の方法にて活性化されたCD8 T細胞を含むウイルス感染疾患を予防又は治療する組成物。
- ウイルスが、オルソミソビリデ科 (Orthomyxoviridae)である請求項5に記載の組成物。
- ウイルスが、インフルエンザウイルス A(Influenzavirus A)、インフルエンザウイルス B(Influenzavirus B)、または、インフルエンザウイルス C(Influenzavirus C)である請求項6に記載の組成物。
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KR1020050033191A KR100735083B1 (ko) | 2005-04-21 | 2005-04-21 | Cd8 t 세포 활성화 방법 |
PCT/KR2006/000228 WO2006112587A1 (en) | 2005-04-21 | 2006-01-20 | Method for activating cd8 t cells |
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JPH1175890A (ja) * | 1997-08-29 | 1999-03-23 | Hitachi Chem Co Ltd | T細胞クローンを用いる疾患治療剤の評価方法 |
JP2002515756A (ja) * | 1997-01-31 | 2002-05-28 | ヘモソル インク. | 選択されたリンパ球の生産方法 |
JP2005503156A (ja) * | 2001-09-20 | 2005-02-03 | エクサイト セラピーズ, インコーポレイテッド | 細胞の活性化および増大 |
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US5374549A (en) * | 1991-01-31 | 1994-12-20 | Terumo Corporation | Process of enriching adherent CD4+ T cells from monocyte depleted peripheral blood mononuclear cells with interleukin 2 and interleukin 4 |
US5405751A (en) * | 1994-01-12 | 1995-04-11 | Schering Corporation | Prenatal diagnosis by cytokine-induced proliferation of fetal T-cells |
CA2310805A1 (en) | 1997-11-24 | 1999-06-03 | Johnson T. Wong | Methods for treatment of hiv or other infections using a t cell or viral activator and anti-retroviral combination therapy |
IL141627A0 (en) | 1998-08-24 | 2002-03-10 | Maxim Pharm Inc | Activation and protection of t-cells (cd4+and cd8+) using an h2 receptor agonist and other t-cell activating agents |
WO2003057171A2 (en) | 2002-01-03 | 2003-07-17 | The Trustees Of The University Of Pennsylvania | Activation and expansion of t-cells using an engineered multivalent signaling platform |
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JP2002515756A (ja) * | 1997-01-31 | 2002-05-28 | ヘモソル インク. | 選択されたリンパ球の生産方法 |
JPH1175890A (ja) * | 1997-08-29 | 1999-03-23 | Hitachi Chem Co Ltd | T細胞クローンを用いる疾患治療剤の評価方法 |
JP2005503156A (ja) * | 2001-09-20 | 2005-02-03 | エクサイト セラピーズ, インコーポレイテッド | 細胞の活性化および増大 |
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