JP4522452B2 - 高分子型癌治療用医薬およびその製造方法 - Google Patents
高分子型癌治療用医薬およびその製造方法 Download PDFInfo
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- JP4522452B2 JP4522452B2 JP2007526841A JP2007526841A JP4522452B2 JP 4522452 B2 JP4522452 B2 JP 4522452B2 JP 2007526841 A JP2007526841 A JP 2007526841A JP 2007526841 A JP2007526841 A JP 2007526841A JP 4522452 B2 JP4522452 B2 JP 4522452B2
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Description
一方、本発明者らは先に上記特許文献2において、炎症部や腫瘍部で誘導されるヘムオキシナーゼ(HO−1)に対する阻害剤であるヘムオキシゲナーゼ阻害活性を有する金属ポルフィリン誘導体、例えば式(1)で示される亜鉛−プロトポルフィリン(以下、ZnPPという)を、ポリエチレングリコール(PEG)と結合させて高分子型抗腫瘍剤とすることができることを提案した。
また癌治療用医薬は固形癌のみならず、リンパ腫、白血病(成人T細胞白血病、エイズ関連T細胞白血病を含む)等のすべての癌の治療薬が含まれる。
またこの方法によれば特許文献2に開示されたようなプロトポルフィリンにジアミノエタンを付加し、アミノ基を付与する反応操作も不要となる。
(SMA−ZnPPミセル複合体の製造方法)
平均分子量約1,500のスチレンと無水マレイン酸共重合物(SMA)1.5gに200mlの0.1M NaOHを加え、pH13となし、マグネチックスターラーで攪拌する。撹拌下に微粉末化した亜鉛(Zn)−プロトポルフィリン(PP)の粉末1.5gを加え、引きつづき攪拌する。時間の経過とともに混濁液は次第に数時間内に濃赤ワイン色の透明溶液となる。不溶性のZnPP、その他残滓を遠心(3,000rpm)で除去し、次にpHを7附近に下げ、この溶液を10mM Na2CO3 /NaHCO3 溶液約3倍量を加え撹拌を続ける。次いで2時間後に0.1M HClを適量加え、pHを約7とし、さらに2時間、撹拌を続ける。次に限外ろ過膜の分子限界サイズ(分子量3,000アミコン社製)を用いて50mlまで加圧下に濃縮する。これによって遊離のZnPPあるいは非ミセル化SMAあるいはその誘導体とその分解物は除去される。さらにこの濃縮されたSMA−ZnPPミセルを含む分画に対し、約20倍量の純水を加え希釈し、上と同様に限外ろ過膜(分子量5000)を用いて加圧下に濃縮・洗浄する。ZnPPのSMAミセル体はこの膜から漏出せず、各遊離の低分子成分のみが漏出する。これによりミセの洗浄を行うことができる。終わりの3回以上は蒸留水で行い、同様の操作を合計3〜5回繰り返したものを凍結乾燥し、注射用原体の粉末とする。
また実施例1で得られたSMA-ZnPPミセル複合体を用いて、ウサギのVX−2腫瘍に対する治療効果を表3に示す。
通常の細胞培養条件下におけるJurkat細胞に対するフラッシュ光分解法により、SMA−ZnPPの光増感剤効果を、PEG-ZnPPと比較して評価した。レーザー光照射開始後の時間(マイクロ秒)と相対吸収発光度との関係を図4に示す。相対吸収発光度はZnPPの三重項状態(励起状態)の寿命を示すものであり、寿命(相対吸収発光度の半減期)を比較すると、SMA−ZnPPが2.4μsであるのに対し、PEG-ZnPPは27μsであり、SMA−ZnPPは光増感効果が効率よく高速で進み、一重項酸素が生じていることがわかる。
リンパ球Jurkat細胞を、Dulbecco MEM培地で5%CO2入り空気中、37℃で培養し、光照射24時間目のJurkat細胞の生存率を、MTT法により、分光学的に定量した。結果を図5に示す。本発明のSMA−ZnPPミセル複合体は5.0μMの濃度においては、Jurkat細胞は殆ど完全に死滅しており、同濃度のPEG-ZnPP投与の場合より優れていることがわかる。
(SMA-ヘミンミセルの製造)
200mlのビーカーにSMAの完全アルカリ加水分解物300mgをとり、50mlの脱イオン水を加え、マグネチックスターラで攪拌下に溶解し、ついで0.1M NaOHを滴下し、pHを10とする。20mlのガラスバイアルにヘミン(シグマ社製)100mgを4mlのDMSO(ジメチルスルフォキシド)にとかし、前述のビーカーにこの溶液を攪拌下に滴下、混合する。ついで1M NaOHを滴下し、pHを12とし、15分攪拌し、ついで1M HClを滴下しつつ、pHを2まで下げると暗褐色の懸濁液となるが、そのまま溶解攪拌を30分〜60分つづける。ついで、遠心(3000〜6000rpm)により沈殿物と上清を除き、さらに0.02M酢酸溶液を30ml加え、懸濁液を再び攪拌(30分)し、次にこのSMA-ミセルの水懸濁液に0.1MNaOHを滴下し、pHを10まで上げ、30分間攪拌ののち、pHを再び0.1M HClで7.4まで下げると、完全に暗褐色の透明溶液となる。以上の操作は室温で行う。これをアミコンの分子量10KDaの cut offの分子フルイ膜で、上記の実施例と同様、濃縮、洗浄をくり返し、ついで凍結乾燥物(粉末)となす。このようにして得られたミセルの一部(0.5mg/ml)をとり、その水溶液を用いて測定した光散乱プロファイルが図6である。図6から、このミセルは平均直径25.5nmの均一な分布を示す標品であることがわかる。その紫外可視部の吸収スペクトルを図7に示す。ヘムの吸収の特徴に由来する約386付近に強い吸収と、約500nmと612nmに弱い吸収極大を示すとともに、SMAに由来する260nm付近に弱い吸収を示す。(濃度は0.01mg/ml、蒸留水中)。
Claims (6)
- 亜鉛プロトポルフィリンとスチレン・マレイン酸共重合体とが、非共有結合により会合したSMAー亜鉛ポルフィリンミセル複合体。
- 請求項1に記載のSMAー亜鉛ポルフィリンミセル複合体を有効成分とする高分子型癌治療用医薬。
- 亜鉛プロトポルフィリンとスチレン・マレイン酸共重合体とを、縮合剤の非存在下、アルカリ性条件下で反応させ、可溶化した後pHを6〜8に調節し、高分子成分分離操作により高分子薬剤ミセル複合体成分を回収することを特徴とする請求項1に記載のSMAー亜鉛ポルフィリンミセル複合体の製造方法。
- スチレン・マレイン酸共重合体及び/又は亜鉛プロトポルフィリンの有機溶媒溶液をアルカリ性条件下で反応させることを特徴とする請求項3に記載のSMAー亜鉛ポルフィリンミセル複合体の製造方法。
- 超音波処理を行い反応させることを特徴とする請求項3または4のいずれかに記載のSMAー亜鉛ポルフィリンミセル複合体の製造方法。
- 高分子成分分離操作が、分子量3,000〜50,000の限外濾過膜によるものであることを特徴とする請求項3〜5のいずれかに記載のSMAー亜鉛ポルフィリンミセル複合体の製造方法。
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CN102000070B (zh) * | 2009-07-08 | 2012-05-23 | 山东弘立医学动物实验研究有限公司 | 用于治疗肿瘤的锰卟啉-氯尼达明联合用药物 |
PT2774625T (pt) * | 2011-09-05 | 2017-06-22 | Maeda Hiroshi | Sonda molecular fluorescente do tipo polímero |
TWI568453B (zh) * | 2011-11-22 | 2017-02-01 | 原創生醫股份有限公司 | 具有螯合型複合微胞之藥物載體及其應用 |
AU2015210650A1 (en) * | 2014-02-03 | 2016-08-18 | Cecilia ESPADAS | Formulations for microparticle delivery of zinc protoporphyrins |
US11633355B2 (en) | 2014-12-12 | 2023-04-25 | Clemson University Research Foundation | Multi-functional particles and methods of using the same |
US10232050B1 (en) | 2014-12-12 | 2019-03-19 | Clemson University | Multi-functional particles and methods of using the same |
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WO2015076312A1 (ja) | 2013-11-19 | 2015-05-28 | 前田 浩 | スチレン-マレイン酸共重合体の誘導体 |
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KR101165760B1 (ko) | 2012-07-18 |
TW200719904A (en) | 2007-06-01 |
JPWO2006112362A1 (ja) | 2008-12-11 |
TW200722095A (en) | 2007-06-16 |
KR20080002814A (ko) | 2008-01-04 |
CN101160354B (zh) | 2010-12-29 |
EP1873204B1 (en) | 2011-09-21 |
US8128959B2 (en) | 2012-03-06 |
TWI374742B (ja) | 2012-10-21 |
WO2006112362A1 (ja) | 2006-10-26 |
EP1873204A4 (en) | 2009-03-25 |
US20090062476A1 (en) | 2009-03-05 |
EP1873204A1 (en) | 2008-01-02 |
CA2605205C (en) | 2011-11-01 |
JPWO2006112361A1 (ja) | 2008-12-11 |
CA2605205A1 (en) | 2006-10-26 |
WO2006112361A1 (ja) | 2006-10-26 |
AU2006238072A1 (en) | 2006-10-26 |
CN101160354A (zh) | 2008-04-09 |
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