JP5580544B2 - がん治療用の遊走阻害剤 - Google Patents
がん治療用の遊走阻害剤 Download PDFInfo
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- JP5580544B2 JP5580544B2 JP2009074991A JP2009074991A JP5580544B2 JP 5580544 B2 JP5580544 B2 JP 5580544B2 JP 2009074991 A JP2009074991 A JP 2009074991A JP 2009074991 A JP2009074991 A JP 2009074991A JP 5580544 B2 JP5580544 B2 JP 5580544B2
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Landscapes
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Description
Ac-RCGVPD-NH2;Stromelysin-1 阻害剤
N-isobutyl-N-(4-methoxyphenylsulfonyl)-glycylhydroxamic Acid;NNGH
N-[[(4,5-dihydro-5-thioxo-1,3,4-thiadiazol-2-yl)amino]carbonyl]-L-phenylalanine
α-[[[(4,5-dihydro-5-thioxo-1,3,4,-thiadiazol-2-yl)amino]carbonyl]amino]-N-(cyclohexylmethyl)-(S)-benzenepropanamide
4-dibenzofuran-2-yl-4-hydroximino-butyric acid
4-(4-biphenyl)-4-hydroxyimino-butyric acid
3-[4-(4-cyanophenyl)phenoxy]propanohydroxamic acid
{N-hydroxy-2(R)-[(4-methoxyphenyl)sulfonyl]-[benzylamino]}-4-methypentanamide
これらの物質に対する1時間曝露後に放射線に曝露した細胞では、細胞増殖と細胞運動の阻害が顕著に促進されることが示された。これらの結果から、新しい放射線療法は細胞移動阻害剤の投与と組み合わせるべきであることが確認されている。
1)外科標本と細胞培養
本実施例で調べた外科標本は、世界保健機関の分類に従って組織学的に多形性グリア芽腫細胞であることが同定された。細胞培養は既報に従い調製した。CGNH-89の亜系統であるCGNH-PMも使用した。細胞培養は10%ウシ胎児血清と2mMグルタミンを添加したイーグル最少必須培地(Life Technologies, Rockville, MD)中で行った。
2)X線照射
細胞に対する放射線照射は、140kV、4.5mAで運転するMBR-1505R X線装置(日立製)に0.5mm Al濾過を用い、焦点源距離30cm、1.11Gy/分の条件で既報(Akimoto, T. et al. Int. J. Radiat. Oncol. Bial. Phys. 50, 195-201(2001))に従って実施した。
3)炭素線照射
炭素線照射は日本原子力研究開発機構 高崎量子応用研究所 AVFサイクロトロンより作られた12C イオン線(220 MeV),LET;linear energy transfer, 108KeV/μm broad beamを用いて照射した。照射中は培養上清を抜き腫瘍細胞は、このための乾燥を防ぐために8-μmの厚さのポリイミド・フィルム(Kapton; DuPont-Toray Co., Ltd.)を被せた。
4)免疫蛍光法
間接蛍光抗体染色は既報に従い実施した(Huang, X. et al. Proc. Natl. Acad. Sci. USA 102, 1065-1070(2005))。二重免疫蛍光法には、フルオレセインイソチオシアネートならびにローダミン結合二次抗体(Molecular Probes, Inc.)を用いて結合抗体を可視化した。染色細胞はレーザー走査共焦点顕微鏡(Pascal LSM5; Carl Zeiss)を用いて検査した。デオキシリボ核酸対比染色はDAPIを用いて実施した。
5)遊走アッセイ
遊走アッセイでは、一端をシリコングリスでコーティングしたガラス製クローニングシリンダ(直径7mm)を培養皿の中央に配置した。このシリンダ内に5×104個の細胞を蒔いた。このプレーティング後24時間の時点で、細胞に放射線照射を行い、このクローニング環を除去した。細胞をさらに48時間にわたり培養した。続いてこのクローニング環の境界を越えた細胞数を計数した。
6)NO産生細胞の同定および標識
NO産生細胞の同定および標識はdiaminofluorescein-2 diacetate (DAF-2 DA、10μMで使用、第一化学薬品株式会社)を用いて行った(Nakatsubo, Kojima FFBS Letters 427,273-266,1998)。NO産生細胞の分布はNO存在下でDAF-2より変換したDAF-2T fluorescenceを共焦点顕微鏡(Pascal LSM5; Carl Zeiss)で可視化することで捉えた。
7)データ分析
データは平均±標準誤差で示している。統計比較は対応のないt検定、または一元配置分散分析(事後分析のためにはSchaffeの試験)を用いて実施した。
<実施例1>
MMP-3は第一ファインケミカル社の抗ヒトMMP-3抗体を200倍希釈で用いた。一酸化窒素(NO)の蛍光測定はDiaminofluorescein-2 diacetate (DAF-2 DA、第一化学薬品(株)製)を10μMで用いた。
<実施例2>
照射による腫瘍細胞の遊走亢進の分子機構をAffymetrix社のジーンチップにて解析した。X線、炭素線照射細胞の遺伝子解析結果を表1に示す。Venn diagramは偽処理細胞に対するX線照射および炭素線照射CGNH細胞から得られたマイクロアレイデータを纏めたものである。有意に変化したプローブに関する値は、Welch t-test、ミスマッチプローブに対する検出有意性、および倍変化基準を組み合わせた選択により決定された。
Claims (1)
- N-ヒドロキシ-2(R)-{[(4−メトキシフェニル)スルフォニル]-[ベンジルアミノ]}-4-メチルペンタンアミド(N-Hydroxy-2(R)-{[(4-methoxyphenyl)sulfonyl]-[benzylamino]}-4-methylpentanamide)を有効成分として含有することを特徴とする放射線がん治療用の放射線増感性遊走阻害剤。
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