JP7320850B2 - 輸送タンパク質過剰発現関連疾患の陽電子放出断層撮映放射性トレーサー、蛍光映像診断及び光力学治療のための輸送タンパク質標的リガンド及びその製造方法 - Google Patents
輸送タンパク質過剰発現関連疾患の陽電子放出断層撮映放射性トレーサー、蛍光映像診断及び光力学治療のための輸送タンパク質標的リガンド及びその製造方法 Download PDFInfo
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- JP7320850B2 JP7320850B2 JP2020539800A JP2020539800A JP7320850B2 JP 7320850 B2 JP7320850 B2 JP 7320850B2 JP 2020539800 A JP2020539800 A JP 2020539800A JP 2020539800 A JP2020539800 A JP 2020539800A JP 7320850 B2 JP7320850 B2 JP 7320850B2
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- fluorine
- iodoanisole
- triflate
- tosylate
- iodide
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Description
製造例1:
2-(6,8-ジクロロ-2-(4-(トリメチルスタニル)フェニル)-イミダゾ[1,2-a]ピリジン-3-イル)-N,N-ジプロピルアセトアミドの製造
フッ素18標識輸送タンパク質過剰発現標的PET放射性トレーサー([18F]BS224)の体外安全性実験は、ヒト血清0.4mLとフッ素18が置換されたフッ素18標識放射性トレーサー([18F]BS224)を含む1%エタノールが含有された水0.4mLと混合した後、37℃で0、10、30、60、120分間放置した後、薄層クロマトグラフィーで安全性を分析した。測定結果、フッ素18標識放射性トレーサー([18F]BS224)は最大120分まで98.7%以上が安定した。これは、フッ素18標識放射性トレーサー([18F]BS224)が体内生物学的研究を遂行するのに十分な安全性を示したものである。
神経炎症モデルラットの製作は、200~250gの体重を有する雄性Sprague-Dawleyラットを使った。ラットを麻酔して頭蓋骨を露出させた後、骨ドリルを用いて小孔を開けた。ついで、LPS(lipopolysaccharide)50μgをハミルトン注射器で予め決めた右側脳領域(ブレグマからAP、0.8mm;L、-2.7mm及びP、-5.0mm)に0.5mL/minの流量で注入した。ハミルトン注射器におけるLPS逆流を防ぐために、投与してから10分後、頭蓋骨の小孔をワックスで充填した後、切開された頭皮を縫合する。
7週齢のSprague-Dawleyラットを準備し、1週間の順化期間を経た後、約8週齢(約300g)のラットを、中大脳動脈閉塞モデルのために、2%イソフルランで呼吸麻酔させた。ラットを側面で横たえた後、両足と頭部を固定した後、首部の毛を除去し、約3cm程度の皮膚を切開した。表皮下部の脂肪層を除去した後、左側に頸動脈部分を探して手術空間を確保した。総頸動脈の下端部位を縛って血流を遮断した後、内頸動脈にプローブを挿入することができる程度の間隔を置いて両側を縛って血流を遮断した。内頸動脈に血流が遮断された中間部分を少し切開した後、ナイロンプローブを挿入して中脳動脈部分まで挿入した。プローブの挿入後、切開された首部位をステープラーで縫合した後、60分間血流を遮断した。ステープラーを除去した後、プローブを丁寧に引き出し、内頸動脈の両側の糸を除去し、二つの糸の中で中脳動脈側にある糸をまた縛った後、総頸動脈部位の糸を除去し、切開された首部位を縫合した。
脂肪親和度の測定は、5%エタノール/食塩水に分散されている[18F]BS224をn-オクタノール(5mL)とリン酸ナトリウム緩衝液(0.15M、pH7.4、5.0Ml)に加えて混合した後、5回測定した。各段階のサンプルの放射能を測定し、脂肪親和度はリン酸ナトリウム緩衝液とn-オクタノールの分当たりカウントの比率で計算した。[18F]BS224の脂肪親和度は2.78±0.4であった。
体外結合親和度の測定
BS224のTSPOとCBRに対する体外結合親和度の測定は、[3H]PK11195と[3H]flunitrazepamの置換反応によって決定した。[Callaghan, P. D. et al. Comparison of in vivo binding properties of the 18-kDa translocator protein (TSPO) ligands [18F]PBR102 and [ 18 F]PBR111 in a model of excitotoxin-induced neuroinflammation. Eur. Nucl. Med. Mol. Imaging 42, 138-51 (2015)参照]
Claims (11)
- フッ素18が溶解した水をアセトニトリルに添加し、85~95℃の温度で加熱することにより、溶媒が蒸発したフッ素18反応液を製造するフッ素18反応液製造段階と、
2-アリール-6,8-ジクロロイミダゾピリジン誘導体と(ジアセトキシ)ヨードアレーン誘導体を反応させてヨードニウム塩前駆体を製造するヨードニウム塩前駆体製造段階と、
前記ヨードニウム塩前駆体と2,2,6,6-テトラメチル-1-ピペリジニルオキシルをアセトニトリルに溶解させてヨードニウム塩前駆体反応液を製造するヨードニウム塩反応液製造段階と、
前記ヨードニウム前駆体反応液を前記フッ素18反応液に添加し、加熱して反応させることにより、フッ素18標識放射性トレーサー物質が含まれた組成物を得る放射性トレーサー物質組成物製造段階と、
を含み、
前記ヨードニウム塩前駆体は、以下の化学式2で表される、フッ素18標識輸送タンパク質過剰発現標的PET放射性トレーサーの製造方法:
ここで、前記XはC又はN、前記YはC又はNであり、
前記Zは、ヨードベンゼントシレート、ヨードトルエントシレート、2-ヨード-1,3,5-トリメチルベンゼントシレート、4-ヨードアニソールトシレート、3-ヨードアニソールトシレート、2-ヨードチオフェントシレート、3-ヨードチオフェントシレート、ヨードベンゼンブロミド、ヨードトルエンブロミド、2-ヨード-1,3,5-トリメチルベンゼンブロミド、4-ヨードアニソールブロミド、3-ヨードアニソールブロミド、2-ヨードチオフェンブロミド、3-ヨードチオフェンブロミド、ヨードベンゼンヨージド、ヨードトルエンヨージド、2-ヨード-1,3,5-トリメチルベンゼンヨージド、4-ヨードアニソールヨージド、3-ヨードアニソールヨージド、2-ヨードチオフェンヨージド、3-ヨードチオフェンヨージド、ヨードベンゼントリフラート、ヨードトルエントリフラート、2-ヨード-1,3,5-トリメチルベンゼントリフラート、4-ヨードアニソールトリフラート、3-ヨードアニソールトリフラート、2-ヨードチオフェントリフラート、及び3-ヨードチオフェントリフラートからなる群から選択される官能基である。 - フッ素18が溶解した水をアセトニトリルに添加し、85~95℃の温度で加熱することにより、溶媒が蒸発したフッ素18反応液を製造するフッ素18反応液製造段階と、
2-アリール-6,8-ジクロロイミダゾピリジン誘導体とビス(ピナコラート)ジボロンを反応させてホウ素エステル前駆体を製造するホウ素エステル前駆体製造段階と、
前記ホウ素エステル前駆体と銅触媒(銅(II)トリフルオロメタンスルホネート、又はテトラキス(ピリジン)銅(II)トリフラート)をジメチルホルムアミド(DMF)に溶解させてホウ素エステル前駆体反応液を製造するホウ素エステル反応液製造段階と、
前記ホウ素エステル前駆体反応液を前記フッ素18反応液に添加し、加熱して反応させることにより、フッ素18標識放射性トレーサー物質が含まれた組成物を得る放射性トレーサー物質組成物製造段階と、
を含み、
前記ホウ素エステル前駆体は、以下の化学式2で表される、フッ素18標識輸送タンパク質過剰発現標的PET放射性トレーサーの製造方法:
ここで、前記XはC又はN、前記YはC又はN、前記Zはピナコールホウ素エステルである。 - 前記放射性トレーサー物質組成物に塩酸水溶液を添加してC18 Sep-Pakカートリッジに吸着させ、水で洗浄した後、エタノールで溶出させて前記組成物を精製する第1精製段階をさらに含む、請求項1又は2に記載のフッ素18標識輸送タンパク質過剰発現標的PET放射性トレーサーの製造方法。
- 前記放射性トレーサー物質組成物を244~264nmのUV検出器と放射性アイソトープガンマ線検出器が含まれたHPLCシステムを用いて精製する第2精製段階をさらに含む、請求項1又は2に記載のフッ素18標識輸送タンパク質過剰発現標的PET放射性トレーサーの製造方法。
- 前記フッ素18反応液製造段階は、前記アセトニトリルに炭酸水素セシウム(CsHCO3)及び18-Crown-6([C2H4O]6)をさらに添加して行う、請求項1又は2に記載のフッ素18標識輸送タンパク質過剰発現標的PET放射性トレーサーの製造方法。
- 下記の化学式1で表される、フッ素18標識輸送タンパク質過剰発現標的PET放射性トレーサー:
ここで、前記Rは18F又は19F、前記XはC又はN、前記YはC又はNである。 - 下記の化学式1で表される放射性トレーサー化合物を含むフッ素18標識陽電子放出断層撮映(PET)放射性トレーサー組成物の製造方法であって、
下記の化学式2で表される前駆体の製造段階と、
前記前駆体をフッ素18反応液に添加することにより、前記放射性トレーサー化合物を含む放射性トレーサー組成物を製造する段階と、
を含む、製造方法:
ここで、前記Rは18F又は19F、前記XはC又はN、前記YはC又はNである:
ここで、前記XはC又はN、前記YはC又はNであり、
前記Zは、ヨードベンゼントシレート、ヨードトルエントシレート、2-ヨード-1,3,5-トリメチルベンゼントシレート、4-ヨードアニソールトシレート、3-ヨードアニソールトシレート、2-ヨードチオフェントシレート、3-ヨードチオフェントシレート、ヨードベンゼンブロミド、ヨードトルエンブロミド、2-ヨード-1,3,5-トリメチルベンゼンブロミド、4-ヨードアニソールブロミド、3-ヨードアニソールブロミド、2-ヨードチオフェンブロミド、3-ヨードチオフェンブロミド、ヨードベンゼンヨージド、ヨードトルエンヨージド、2-ヨード-1,3,5-トリメチルベンゼンヨージド、4-ヨードアニソールヨージド、3-ヨードアニソールヨージド、2-ヨードチオフェンヨージド、3-ヨードチオフェンヨージド、ヨードベンゼントリフラート、ヨードトルエントリフラート、2-ヨード-1,3,5-トリメチルベンゼントリフラート、4-ヨードアニソールトリフラート、3-ヨードアニソールトリフラート、2-ヨードチオフェントリフラート、3-ヨードチオフェントリフラート、及びピナコールホウ素エステルからなる群から選択される官能基である。 - 下記の化学式2で表される化合物:
ここで、前記XはC又はN、前記YはC又はNであり、
前記Zは、ヨードベンゼントシレート、ヨードトルエントシレート、2-ヨード-1,3,5-トリメチルベンゼントシレート、4-ヨードアニソールトシレート、3-ヨードアニソールトシレート、2-ヨードチオフェントシレート、3-ヨードチオフェントシレート、ヨードベンゼンブロミド、ヨードトルエンブロミド、2-ヨード-1,3,5-トリメチルベンゼンブロミド、4-ヨードアニソールブロミド、3-ヨードアニソールブロミド、2-ヨードチオフェンブロミド、3-ヨードチオフェンブロミド、ヨードベンゼンヨージド、ヨードトルエンヨージド、2-ヨード-1,3,5-トリメチルベンゼンヨージド、4-ヨードアニソールヨージド、3-ヨードアニソールヨージド、2-ヨードチオフェンヨージド、3-ヨードチオフェンヨージド、ヨードベンゼントリフラート、ヨードトルエントリフラート、2-ヨード-1,3,5-トリメチルベンゼントリフラート、4-ヨードアニソールトリフラート、3-ヨードアニソールトリフラート、2-ヨードチオフェントリフラート、3-ヨードチオフェントリフラート、及びピナコールホウ素エステルからなる群から選択される官能基である。 - 下記の化学式3で表される蛍光及び光力学治療用光線感作剤標識リガンド輸送タンパク質過剰発現標的トレーサー:
前記XはC又はN、前記YはC又はNである。また、前記ポリエチレングリコール(PEG)数nは1~10である。前記PEGと蛍光染料及び光力学治療用光線感作剤を連結するリンカー(Linker)は、エーテル(ether)、アミド(amide)、エステル(ester)、ウレア(urea)、ウレタン(urethane)、チオウレア(thiourea)、及びジスルフィド(disulfide)からなる群から選択される化合物であり得、X、Yを含む環の2、3及び4位の中でいずれか一位に置換される。
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