JPWO2008013276A1 - 悪性中皮腫治療剤 - Google Patents
悪性中皮腫治療剤 Download PDFInfo
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- JPWO2008013276A1 JPWO2008013276A1 JP2008526835A JP2008526835A JPWO2008013276A1 JP WO2008013276 A1 JPWO2008013276 A1 JP WO2008013276A1 JP 2008526835 A JP2008526835 A JP 2008526835A JP 2008526835 A JP2008526835 A JP 2008526835A JP WO2008013276 A1 JPWO2008013276 A1 JP WO2008013276A1
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- mesothelioma
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Abstract
Description
Kanazawa N. et al. Jpn. J. Clin. Oncol. 36, 254-257, 2006 Sterman, D.H. et al. Clin. Cancer Res. 11, 7444-7453, 2005 Mukherjee, S. et al. Cancer Gene Ther. 7, 663-670, 2000 Harrison, L.H. et al. Ann. Thorac. Surg. 70, 407-411, 2000 Adusumilli, P.S. et al. Cancer Biol. Ther. 5, 48-53, 2006
(1)カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプの変異体を含む、中皮腫の治療剤;
(2)該変異体がd12.CALPΔRR株に由来するものである、(1)記載の治療剤;
(3)該変異体がd12.CALPfΔRR株である、請求項2記載の治療剤;
(4)中皮腫が悪性のものである、(1)ないし(3)のいずれかに記載の治療剤;
(5)患者から取り出された中皮腫細胞に、カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプ変異体を感染させることを特徴とする、中皮腫治療用細胞の製造方法;
(6)該変異体がd12.CALPΔRR株に由来するものである、(5)記載の方法;
(7)該変異体がd12.CALPfΔRR株である(6)記載の方法;
(8)中皮腫が悪性のものである、(5)ないし(7)のいずれかに記載の方法;
(9)(5)ないし(8)のいずれかに記載の方法により得ることのできる中皮腫治療用細胞;
(10)カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプの変異体を中皮腫患者に投与することを特徴とする、中皮腫の治療方法;
(11)該変異体がd12.CALPΔRR株に由来するものである、(10)記載の方法;
(12)該変異体がd12.CALPfΔRR株である、(11)記載の方法;
(13)中皮腫が悪性のものである、(10)ないし(12)のいずれかに記載の方法;
(14)(9)記載の中皮腫治療用細胞を中皮腫患者に投与することを特徴とする、中皮腫の治療方法;
(15)中皮腫治療用の医薬の製造のための、カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプの変異体の使用;
(16)該変異体がd12.CALPΔRR株に由来するものである、(15)記載の使用;
(17)該変異体がd12.CALPfΔRR株である、(16)記載の使用;
(18)中皮腫が悪性のものである、(15)ないし(17)のいずれかに記載の使用;
(19)中皮腫治療用の医薬の製造のための、(9)記載の中皮腫治療用細胞の使用;
(20)カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプの変異体;
(21)d12.CALPΔRR株に由来するものである、(20)記載の変異体;
(22)d12.CALPfΔRR株である、(21)記載の変異体
を提供するものである。
1.合胞体形成型HSV−1変異体、d12.CALPfΔRRの分離
Vero細胞に、溶解型のプラークを形成するd12.CALPΔRRを感染させたところ、合胞体型プラークを形成する変異体ウイルスを見出し、これをGILSON社製ピペットマンP200のチップを用いて細胞ごと吸引分離し、100μlのコールドウイルスバッファー(150mMのNaClを含む20mMのTris−HCl;pH7.5)に懸濁し、凍結保存した。
1%の熱不活性FBS/PBS中で、感染多重度(MOI)が0.1〜1.0pfu/cellで、6ウエル組織培養プレート中の悪性中皮腫細胞のサブコンフルエント単層培養にd12.CALPΔRR及びd12.CALPfΔRRを感染させた。かかる感染細胞を37℃で1時間インキュベートし、その後、1%のFBSと11.3μg/mlのヒトIgG(Jackson ImmunoResearch Lab.社製)を含む前記培地で培養した。感染の48時間後、X−Gal染色しプラーク/wellの数および面積を評価した。結果を図3に示す。d12.CALPfΔRRは、d12.CALPΔRRに比べて、ヒト悪性中皮腫培養細胞に対しより強力な細胞傷害活性を示した(X−Gal染色の青色はウイルスの増殖と細胞傷害の領域を示す)。
24wellの培養プレートに5×104cells/wellのSK−LMS−1ヒト平滑筋肉腫培養細胞株を培養し、d12.CALPfΔRR、d12.CALP、hrR3ウイルスをMOI0.01で感染させた後、1%FBS/DMEMにガンシクロビルを種々の濃度に添加して26時間培養した。10%ホルマリンPBSで細胞を固定した後、X−Gal染色しプラーク数を計測した。結果を図5に示す。d12.CALPfΔRRは、ガンシクロビルに高感受性のICP6欠失HSV−1変異体hrR3よりも高いガンシクロビル感受性を示すことから、安全性が高い。内在性のチミジンキナーゼ遺伝子を欠失するHSV−1変異体d12.CALPは全くガンシクロビル感受性がなかった。
1.ヒト悪性中皮腫細胞の皮下移植モデルに対するd12.CALPfΔRR3回腫瘍内投与による治療効果の検討
ヒト悪性中皮腫細胞にルシフェラーゼ遺伝子をトランスフェクションし、最も化学発光強度と増殖速度が高いクローンを選別した。クローン化した細胞中、SCIDマウス背部皮下に定着したものから、中皮腫の4−5mm角の腫瘍塊を、6週齢の雌の重症複合型免疫不全マウス(SCIDマウス)(日本SLC社製)の背部皮下に移植した。腫瘍は、SCIDマウスに移植後30日で直径6から7mm程度(50−70mm3)に成長した。1×107pfu/マウスのd12.CALPfΔRRを含む50μl(マウス1匹あたり)のウイルス懸濁液(n=3)、あるいは同量のウイルスバッファー(n=3)を、30Gの注射針を用いて腫瘍内に5日間隔で合計3回注入した。1回目のウイルス注入後11日目に腹腔内にルシフェリン(Sigma Chemicals社製)を注入し、リアルタイムインビボイメージングシステム(Berthold社製)を用いて、背部皮下の腫瘍細胞からの化学発光(total photon count)を高感度CCDカメラで計測した。リアルタイムインビボイメージングの結果を図6に示す。対照(ウイルスバッファー注入腫瘍)はフォトカウント2.79x107、治療群(d12.CALPfΔRR注入腫瘍)はフォトカウント3.84x106で、治療群は対照の13.7%にフォトカウントが減少した。これらの結果より、背部皮下に移植したヒト悪性中皮種細胞への直接注入により、d12.CALPfΔRRは顕著な抗腫瘍効果を有することがわかった。
悪性中皮腫細胞(1×107cells/マウス)を6週齢の雌のSCIDマウスの胸腔内に注入して、胸腔内悪性中皮腫モデルを作製した。SCIDマウスに移植後2週目に1×107pfu/マウスのd12.CALPfΔRRを含む50μl(マウス1匹あたり)のウイルス懸濁液(n=3)あるいは同量のウィルスバッファー(n=3)、30Gを用いて胸腔内に1週間隔で合計2回注入した。1回目の注入後19日目に解剖し治療効果を評価した。結果を図8に示す。d12.CALPfΔRRはSCIDマウス胸腔内に移植したヒト悪性中皮種細胞に対し顕著な抗腫瘍効果を示した。
ヒト腹膜悪性中皮腫培養細胞にホタル由来のルシフェラーゼ遺伝子pGL4.13(Promega社製)を導入し、インビトロイメージング法を用いてルシフェラーゼ標識ヒト腹膜悪性中皮腫クローン細胞株を得た。この細胞株を用いてSCIDマウス(日本クレア社製)においてルシフェラーゼ標識ヒト腹膜悪性中皮腫の腹腔内モデルを作製した。腫瘍腹腔内移植後6、20、32および39日目にインビボイメージングを行った。ジエチルエーテル麻酔下で、ルシフェリン3.75mg/kgを腹腔内投与した。ルシフェリン腹腔内投与から3分後にネンブタール25mg/kgを腹腔内投与し、10分後にNightOWLs(Berthold社)を用いてイメージングを開始した。腫瘍腹腔内移植後21、27および33日目に、d12.CALPfΔRRウイルスを腹腔内に直接投与した。d12.CALPfΔRRウイルスをウイルスバッファーで1.0×107pfu/100μLに希釈したものをマウス1匹あたり100μLずつ腹腔内にジエチルエーテル麻酔下で投与した(n=5)。対照群にはウイルスバッファーを1匹あたり100μLずつ腹腔内に直接投与した(n=5)。
Claims (22)
- カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプの変異体を含む、中皮腫の治療剤。
- 該変異体がd12.CALPΔRR株に由来するものである、請求項1記載の治療剤。
- 該変異体がd12.CALPfΔRR株である、請求項2記載の治療剤。
- 中皮腫が悪性のものである、請求項1ないし3のいずれか1項記載の治療剤。
- 患者から取り出された中皮腫細胞に、カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプ変異体を感染させることを特徴とする、中皮腫治療用細胞の製造方法。
- 該変異体がd12.CALPΔRR株に由来するものである、請求項5記載の方法。
- 該変異体がd12.CALPfΔRR株である請求項6記載の方法。
- 中皮腫が悪性のものである、請求項5ないし7のいずれか1項記載の方法。
- 請求項5ないし8のいずれか1項記載の方法により得ることのできる中皮腫治療用細胞。
- カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプの変異体を中皮腫患者に投与することを特徴とする、中皮腫の治療方法。
- 該変異体がd12.CALPΔRR株に由来するものである、請求項10記載の方法。
- 該変異体がd12.CALPfΔRR株である、請求項11記載の方法。
- 中皮腫が悪性のものである、請求項10ないし12のいずれか1項記載の方法。
- 請求項9記載の中皮腫治療用細胞を中皮腫患者に投与することを特徴とする、中皮腫の治療方法。
- 中皮腫治療用の医薬の製造のための、カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプの変異体の使用。
- 該変異体がd12.CALPΔRR株に由来するものである、請求項15記載の使用。
- 該変異体がd12.CALPfΔRR株である、請求項16記載の使用。
- 中皮腫が悪性のものである、請求項15ないし17のいずれか1項記載の使用。
- 中皮腫治療用の医薬の製造のための、請求項9記載の中皮腫治療用細胞の使用。
- カルポニン遺伝子を標的に増殖する単純ヘルペスウイルスのFタイプの変異体。
- d12.CALPΔRR株に由来するものである、請求項20記載の変異体。
- d12.CALPfΔRR株である、請求項21記載の変異体。
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