JP2016529055A - 撮像可能なポリマー - Google Patents
撮像可能なポリマー Download PDFInfo
- Publication number
- JP2016529055A JP2016529055A JP2016539623A JP2016539623A JP2016529055A JP 2016529055 A JP2016529055 A JP 2016529055A JP 2016539623 A JP2016539623 A JP 2016539623A JP 2016539623 A JP2016539623 A JP 2016539623A JP 2016529055 A JP2016529055 A JP 2016529055A
- Authority
- JP
- Japan
- Prior art keywords
- radiopaque
- hydrogel
- beads
- microspheres
- diol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 47
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- 239000011630 iodine Substances 0.000 claims description 45
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Abstract
Description
式中、Zは、環状アセタールと結合した連結基であるか、フェニル基が環状アセタールと結合するよう存在せず;
Zが存在する場合、ZはC1〜6アルキレン、C1〜6アルコキシレンまたはC1〜6アルコキシアルキレンであり;
Halは1つ、2つ、3つまたは4つの共有結合した放射線不透過性ハロゲンである。
特に、Zは−CH2OCH2−または−CH2O−であるか、存在せず、
Halは、特に3つまたは4つの臭素またはヨウ素、好ましくはヨウ素、例えば2,3,5もしくは2,4,6トリヨードまたは2,3,4,6テトラヨードであり、
Jは、好ましくは−CH2−である。
(a)1,2−ジオール基または1,3−ジオール基を有するポリマーを含む、予め形成されたヒドロゲルマイクロスフェアを、上記マイクロスフェアを膨潤させることができる溶媒中で膨潤させる段階;(b)膨潤させたマイクロスフェアを、酸性条件下で上記1,2ジオールまたは1,3ジオールと環状アセタールを形成することができる放射線不透過性化学種の溶液と混合するか接触させる段階;および(c)マイクロスフェアを抽出または単離する段階。
好ましくは、Aは、−CHO、−CHOR1OR2 −CHOR1OH、−CHSR1OHまたは−CHSR1SR2であり、式中、R1およびR2は、C1〜4アルキル、好ましくはメチルまたはエチルから独立して選択される。
温度計、窒素バブラーおよびオーバーヘッドスターラーを装着した500ml三つ口平底フラスコ内で、窒素ブランケットおよび激しい攪拌条件下、室温でエタノール100mlにフェノール10gを溶かした。1.25モル当量の水酸化ナトリウムペレットを加え、窒素ブランケット下、ペレットが完全に溶解するまでスラリーを30分間攪拌した。次いで、温度を25℃に維持しながら1.1モル当量の2−ヨードエタノールを加え、15分間攪拌した。溶液をエタノールで加熱還流した。HPLC(実施例1の条件)によりフェノールの消費および2−(2,4,6−トリヨードフェノキシ)エタノールの形成を監視した。25時間後、0.27モル当量の2−ヨードエタノールを追加し、溶液を還流しながらさらに2時間攪拌した。溶液を室温に冷却した後、激しい攪拌条件下で脱イオン水150mlを急速に加えた。得られたスラリーを真空下でろ過し、母液、次いで脱イオン水30mlで3回、最後にエタノール5mlで洗浄した。得られた桃色のろ塊を酢酸エチル100ml中に溶かし、有機層を大量の水酸化ナトリウム溶液(pH14)で抽出し、硫酸マグネシウム酸で乾燥させ、ロータリーエバポレーターで濃縮して、オフピンクの固体5.9gを得て、これをSigma−Aldrich社から市販されている分析標準品との比較分析によって2−(2,4,6−トリヨードフェノキシ)エタノールと同定した。
温度計、窒素バブラーおよびオーバーヘッド攪拌機を装着した500ml三つ口平底フラスコ内で、窒素ブランケット下、無水DMSO 150mlにアルコール5.9gを溶かした。この溶液を攪拌して40℃に加熱し、温度を40℃〜41℃に維持しながら1.6モル当量のT3P(EtOAcに溶かした50%w/w溶液)を徐々に加えた。高速液体クロマトグラフィーによりアルコールの消費およびアルデヒドの生成を経時的に監視した(実施例1の条件)。24時間後、シリンジポンプを用いて反応混合物に水150mlを2時間にわたって徐々に加えた。溶液からオフピンクの固体が沈殿し、真空下でろ過して桃色のろ塊が得られ、これを水で洗浄した。得られた不純物を含む凝集塊を酢酸エチル/ヘキサンに溶かした後、真空下、40℃で乾燥させて油を得て、1HNMR分析により2−(2,3,5−トリヨードフェノキシ)アセトアルデヒドと同定した。
国際公開第2004/071495号の実施例1に従って、架橋ヒドロゲルマイクロスフェアを調製した。この工程は、生成物を真空乾燥させて残留溶媒を除去する段階の後で終了させた。高AMPS形態および低AMPS形態の両方のポリマーを調製し、しかるべき大きさの範囲になるようビーズをふるい分けた。ビーズは乾燥状態または生理的食塩水中のいずれかで保管し、加圧滅菌した。高AMPS形態および低AMPS形態のいずれのポリマーを用いても良好な放射線不透過性の結果が得られる。
窒素をパージした500ml容器に乾燥PVA系ビーズ(実施例4を参照されたい―高AMPS型105〜150μm)5.0gおよび0.26当量のアルデヒド(7.27g)(実施例1に従って調製したもの)を入れた。窒素ブランケット下で無水DMSO 175mlを加え、攪拌してビーズを懸濁状態に保った。懸濁液を50℃に温め、メタンスルホン酸11mlを徐々に加えた。反応スラリーを50℃で27時間攪拌し、その間、HPLCによりアルデヒドの消費を監視した。次いで、反応スラリーを大量のDMSO/1%NaCl、次いで生理食塩水で洗浄した。得られたビーズは、ヨウ素濃度が141mg I/ml湿潤ビーズであり、放射線不透過性が4908HUであった。
2−(2,4,6−トリヨードフェノキシ)アセトアルデヒドを実施例2に従って調製し、反応温度を20℃〜50℃に維持したこと以外は実施例5と同じ方法に従って、PVA系ヒドロゲルビーズ(実施例4の高AMPS型を参照されたい)と反応させた。反応時間も1時間未満に短縮した。ヨウ素含有量は18mg I/ml湿潤ビーズと測定された。
実施例1に記載されている通りにT3PおよびDMSOを用いて、2,3,4,6−テトラヨードベンジルアルコール(ACES Pharma社;米国)を2,3,4,6テトラヨードベンズアルデヒドに変換した。次いで、窒素ブランケット下でDMSOと共にPVAヒドロゲルマイクロスフェア(実施例4を参照されたい―大きさ150〜250μmの高AMPS型)2.05gに0.6モル当量の2,3,4,6テトラヨードベンズアルデヒド(8.8g)を加えた。反応混合物を50℃に加熱し、数時間攪拌した。HPLCで反応を監視し、反応が完了したとき、ビーズをろ過し、DMSO、水、次いで0.9%生理食塩水で洗浄した。次いで、放射線不透過性ビーズを分析用に0.9%生理食塩水溶液中で保管した。ヨウ素含有量は30mg/ml湿潤ビーズと測定された。
実施例(5および6)で作製されたビーズのうち典型的なものの光学顕微鏡像を図1に示す。充填生理食塩水を除去し、残った生理食塩水をティッシュペーパーで吸い出すことにより、ビーズの乾燥重量を測定した。次いで、ビーズを50℃で一晩、真空乾燥させて水分を除去し、これよりポリマーの乾燥ビーズ重量および固体含有量(w/w%)を得た。
ビーズの固体含有量(%)×乾燥ビーズのヨウ素含有量(%)。
マイクロCTを用いて、上の実施例5に従って調製した放射線不透過性塞栓ビーズの試料の放射線不透過性を評価した。
ソフトウェア:SkyScan1172バージョン1.5(ビルド14)
NReconバージョン1.6.9.6
CT Analyserバージョン1.13.1.1
光源の種類:10Mp Hamamatsu 100/250
カメラ解像度(ピクセル):4000×2096
カメラビニング:1×1
電源電圧kV:65
電源電流μA:153
画像ピクセルサイズ(μm):3.96
フィルター:Al 0.5mm
回転ステップ(度):0.280
出力フォーマット:8ビットBMP
ダイナミックレンジ:0.000〜0.140
平滑化:0
線質硬化:0
ポストアライメント:補正
リングアーチファクト:16
実施例12(a)ドキソルビシン
実施例5に従って調製したROビーズスラリー(大きさ100〜300μm、ヨウ素47mg I/ml湿潤ビーズ)1mLをメスシリンダーを用いて量り取り、液体を除去した。周囲温度で継続的に浸透しながら、ドキソルビシン溶液(25mg/mL)4mLを放射線不透過性ビーズと混合した。20時間装填した後、消耗された溶液を除去し、薬物が装填されたビーズを脱イオン水(10mL)で4〜5回洗浄した。消耗された装填溶液と洗浄溶液とを合わせたドキソルビシン濃度をUV分光光度計で483nmにおいて測定することにより、装填されたドキソルビシンが80mg/mLビーズであると算出された。放射線不透過性ビーズのドキソルビシン塩酸塩薬物装填容量は、ビーズ中のヨウ素含有量の非線形関数であると決定された。
ドキソルビシンの場合と同じ方法で、ROビーズ(実施例5に従って作製したもの)および非ROビーズ(実施例4に従って作製した大きさ70〜150μmの高AMPS)中にエピルビシンを装填した。ビーズ1mlを、装填溶液(25mg/mlエピルビシン)1.5mlを用いて装填した。90分後の放射線不透過性ビーズ中の最終的な装填量は37.49mg(装填効率99.97%)であり、非ROビーズでは36.43(装填効率97.43%)であった。
10mLメスフラスコ内で無水DMSOにスニチニブ粉末400mgを溶かすことにより、スニチニブDMSO溶液を調製した。ROビーズスラリー(70〜150μm、134.4mg I/ml湿潤ビーズ、実施例5に従って調製したもの)1mlをDMSO 10mlで3回予備洗浄して残留水を除去した。スニチニブ−DMSO溶液(40mg/mL)2.5mLをROビーズスラリーと混合し、1〜2時間混合させた。次いで、装填溶液を除去した後、ビーズスラリーに生理食塩水10mLを加えて、ビーズ内部にスニチニブを沈殿させた。洗浄溶液および薬物粒子をセルストレーナーでろ過し、洗浄を3〜4回繰り返した。非ROビーズ(100〜300μm、実施例4に従って調製したもの)を同じ方法で処理した。
RO PVAマイクロスフェア(大きさ70〜150μm、ヨウ素含有量134mgヨウ素/mlビーズ、実施例5に従って調製したもの)または非RO PVAマイクロスフェア(DC Bead(商標)100−300、Biocompatibles社;英国)1mlをDMSO 10mlで3回予備洗浄して残留水を除去した。ソラフェニブ/DMSO溶液(無水DMSO中39.8mg/mL)をビーズスラリー1mLと1時間混合した(放射線不透過性ビーズには2.5mL、非放射線不透過ビーズには2mL)。装填溶液を除去した後、ビーズスラリーに生理食塩水20mLを加えた。ビーズ懸濁液をセルストレーナーでろ過し、洗浄を3〜4回繰り返した。最終装填レベルを、ごく一部の水和ビーズのDMSO抽出およびHPLC(カラム:Kinetex 2.6u XB−C18 100A 75×4.60mm;移動相、水:アセトニトリル:メタノール:トリフルオロ酢酸=290:340:370:2(v/v);検出254nm;カラム温度40℃;流速:1mL/分)による薬物濃度の決定により決定した。
25mlの琥珀色メスフラスコ内で超音波処理を用いて、0.1M HCl 14mlにバンデタニブ500mgを溶かし、脱イオンを加えて25mlにすることによって、20mg/mlのバンデタニブ溶液を調製した。次いで、バンデタニブを以下のプロトコルに従ってRO PVAヒドロゲルマイクロスフェア(実施例5に従って調製したもの:大きさ70〜150μm;ヨウ素含有量147mg/mlビーズ)および非ROマイクロスフェア(DC Bead 100−300;Biocompatibles UK社)の両方に装填した:
各バイアル1mLの水和ROマイクロスフェア(大きさ70〜150μm、ヨウ素含有量134mgヨウ素/mlビーズ、実施例5に従って調製したもの)および非RO PVAマイクロスフェア(DC Bead 100−300、Biocompatibles社;英国)を1−メチル−2−ピロリジノン5mLで4回洗浄した。次いで、溶媒を除去した。ミリプラチン0.147gを1−メチル−2−ピロリジノン25mLと混合し、懸濁液を水浴中、75℃に加熱して、ミリプラチンを溶解させた。洗浄したビーズ中に薬液2mLを加え、混合物を75℃の水浴中に1時間置いた。ビーズ懸濁液をセルストレーナーでろ過して装填溶液を除去した後、生理食塩水約100mLで洗浄した。
非ROビーズ(100−300μm―実施例4の高AMPS型に従って作製したもの)およびROビーズ(100〜300μm、163mg I/mL、実施例5に従って作製したもの)の各ビーズ試料2mLをイリノテカン水溶液(10mg/mL)10mlと混合した。消耗された装填溶液中のイリノテカンレベルを384nmでのUV分光測定により決定することによって、装填量を測定した。非ROおよびROビーズにはともに、90分以内に薬物のほぼ100%が装填された。
非ROビーズ(70〜150μm―実施例4の高AMPS型に従って作製したもの)およびROビーズ(70〜150μm、146mg I/mL、実施例5に従って作製したもの)の各ビーズ試料1mLをトポテカン水溶液(15.08mg/mL)と混合して、攪拌下で40mg(2.5ml)または80mg(5ml)の用量を装填した。約1.5時間後、消耗された装填溶液中のトポテカンレベルを384nmでのUV分光測定により上記のように決定することによって、トポテカンの装填量を測定した。表3は、ROビーズ試料にトポテカンが最大80mg装填されたことを示している。非ROビーズおよびROビーズはともに、40mgトポテカンの98%超が装填された。
実施例13(a)ドキソルビシン。
褐色瓶に入れたPBS 1000mlに実施例13(a)に従って調製したドキソルビシン装填ビーズ(70〜150μm、158mg I/ml、50mg/mlドキソルビシン)を室温で加えた。ビーズ懸濁液をマグネチックスターラーにより低速で攪拌した。試料採取時点で、溶出媒体1mLを5μmのフィルター針で取り出し、483nmで標準物質に対するUVによって分析した。溶出プロファイルを図4に示した。
褐色瓶に入れたPBS 400ml、0.5g/L Tween 80に、実施例13(c)に従って調製したスニチニブ装填ビーズを水浴中、37℃で加えた。ビーズ懸濁液をマグネチックスターラーにより低速で攪拌した。1時間、2時間、3時間および4時間の試料採取時点で、HPLC分析(実施例13(c)の条件)用に溶出媒体10mLを5μmのフィルター針で取り出し、新鮮なPBS溶液10mLを加えて体積を補った。5時間、25時間、48時間および73時間の試料採取時点で、溶出媒体100mLを等体積の新鮮なPBS溶液と交換した。試料をHPLCにより分析した。溶出プロファイルを図6に示す。
褐色瓶に入れた0.5g/L Tween 80を含むPBS 400mLに、実施例13(d)に従って調製したソラフェニブ装填ビーズを水浴中、37℃で加えた。ビーズ懸濁液をマグネチックスターラーにより低速で攪拌した。1時間、2時間、4時間および6時間の試料採取時点で、HPLC分析用に溶出媒体10mLを5μmのフィルター針で取り出し、新鮮なPBS溶液10mLを加えて体積を400mLにした。8時間、24.5時間および31時間の試料採取時点で、溶出媒体100mLを等体積の新鮮なPBS溶液と交換した。各種類のビーズについて2回の反復試験を実施した。ROビーズおよび非ROビーズからのソラフェニブの溶出プロファイルを図6に示す。
実施例13(e)に従って調製したバンデチニブ(vandetinib)装填ROビーズおよび非ROビーズ(バンデチニブ(vandetinib)/mlビーズのビーズ2ml、70〜150μmのビーズおよび141mg I/ml湿潤ビーズのROビーズ)を、PBS 500mLを含みマグネチックフリー(magnetic flea)を入れた琥珀色の瓶に周囲温度で入れた。各試料採取時点で、蠕動ポンプによってすべてのPBS溶出媒体を瓶からカニューレフィルターを通して取り出し、同じ体積の新鮮なPBSと交換した。溶出媒体5μlを、254nmで検出するC18逆相HPLCにより分析した。溶出プロファイルを図7に示す。
実施例13(f)に従って作製したミリプラチン装填ビーズを、100mL Duran(登録商標)瓶に入れた1%のTween 80を含むPBS 50mLに加えた。瓶を37℃の水浴中に浮かせ75rpmで回転させて、ビーズを攪拌した。1日、5日、11日、15日および22日の試料採取時点で、ICP分析用に溶出媒体20mLを取り出し、新鮮なPBS/Tween溶液20mLを加えて50mLの体積にした。ROビーズおよび非ROビーズからのミリプラチンの溶出プロファイルを図8に示す。
褐色瓶に入れたPBS 500mlに実施例13(g)で調製した試料163m I/mlを37℃で加え、マグネチックスターラーにより低速で攪拌した。試料採取時点で、溶出媒体1mlを5μmのフィルター針で取り出し、369nmで標準物質に対するUVによって分析した。溶出プロファイルを図9に示した。
実施例13に従って調製したドキソルビシン装填ビーズの一部を、実施例12に記載されている通りにマイクロCT解析に供した。薬物装填ビーズは放射線不透過性であることがわかった。平均のビーズ放射線不透過性(グレースケール)は139(n=3)と決定された。
本発明のマイクロスフェアは、薬物装填の有無を問わず、国際公開第07/147902号(15ページ)に記載されているプロトコルに従い、Lyo Screen Control(LSC)パネルとPfeiffer DUO 10 Rotary Vane Vacuumポンプとを備えLyolog LL−1文書化ソフトウェアによって制御されるEpsilon 1−6D凍結乾燥機(Martin Christ Gefriertrocknungsanlagen社、オスターオーデ・アム・ハルツ、ドイツ)を用いて、以下に簡潔に記載する通りに凍結乾燥させ得る。
この試験には雄ヨークシャー交雑種家畜ブタ(約14週齢)を用いた。
Claims (37)
- 放射線不透過性化学種でアセタール化された1,2−ジオール基または1,3−ジオール基を含み、前記放射線不透過性化学種が1つまたは複数の共有結合した放射線不透過性ハロゲンを含む、ヒドロゲル。
- ポリマーが、環状アセタール結合を介して前記ポリマーに共有結合したヨード化芳香族基を含むように、放射線不透過性化学種でアセタール化された1,2−ジオール基または1,3−ジオール基を含む、請求項1に記載のヒドロゲル。
- 架橋ポリマー網目構造である、請求項1または2のいずれかに記載のヒドロゲル。
- ポリビニルアルコール(PVA)を含み、前記PVAが、N−アクリロイル−アミノアセトアルデヒドジメチルアセタールによるPVAのアセタール化から形成されたペンデントアクテタート(actetate)基を含み、2−アクリルアミド−2−メチルプロパンスルホン酸と架橋されている(PVA−AMPS)、請求項1〜3のいずれかに記載のヒドロゲル。
- 前記放射線不透過性化学種が環状アセタールの形態で前記ヒドロゲル内でアセタール化されている、請求項1に記載のヒドロゲル。
- 前記放射線不透過性化学種がヨウ素および臭素から選択される、請求項1〜5のいずれかに記載のヒドロゲル。
- 前記放射線不透過性化学種がヨード化フェニル基または臭化フェニル基を含む、請求項6に記載のヒドロゲル。
- 乾燥重量で10%超のヨウ素を含む、請求項6または7のいずれかに記載のヒドロゲル。
- 微粒子またはマイクロスフェアの形態である、請求項1〜8のいずれかに記載のヒドロゲル。
- 10〜2000μmの大きさの範囲の平均径を有するマイクロスフェアの形態である、請求項9に記載のヒドロゲル。
- 500HU以上の平均放射線不透過性を有するマイクロスフェアまたは微粒子の形態である、請求項1〜10のいずれかに記載のヒドロゲル。
- 生理的pHで正味電荷を有する、請求項1〜11のいずれかに記載のヒドロゲル。
- 請求項1〜14のいずれかに記載のヒドロゲルと、治療剤とを含み、前記治療剤が前記ヒドロゲルのマトリックスに吸収されている、組成物。
- 前記治療剤が、前記ヒドロゲル内に静電的に保持され、電解質媒体中で前記ヒドロゲルから溶出する、請求項15に記載の組成物。
- 放射線不透過性ポリマーを作製する方法であって、1,2−ジオール基または1,3−ジオール基を含むポリマーを、前記1,2−ジオールまたは1,3−ジオールと環状アセタールを形成できる放射線不透過性化学種と酸性条件下で反応させることを含む、方法。
- 前記ポリマーが架橋されている、請求項17に記載の方法。
- 前記ポリマーがポリビニルアルコール(PVA)またはPVAのコポリマーを含む、請求項17または18に記載の方法。
- 前記放射線不透過性化学種が有機分子または有機金属錯体であり、1HUを上回る放射線不透過性をもたらし、アルデヒド、アセタール、ヘミアセタール、チオアセタールおよびジチオアセタールからなる群より選択される反応部分を含む、請求項17〜19のいずれかに記載の方法。
- 前記放射線不透過性化学種がヨウ素または臭素を含む、請求項17〜20のいずれかに記載の方法。
- 前記放射線不透過性化学種がヨード化アルデヒドである、請求項21に記載の方法。
- 前記放射線不透過性化学種がヨード化ベンジルアルデヒド、ヨード化フェニルアルデヒドまたはヨード化フェノキシアルデヒドである、請求項22に記載の方法。
- 放射線不透過性ヒドロゲルマイクロスフェアを作製する方法であって、
(a)1,2−ジオール基または1,3−ジオール基を有するポリマーを含む、予め形成されたヒドロゲルマイクロスフェアを、前記マイクロスフェアを膨潤させることができる溶媒中で膨潤させる段階と、
(b)膨潤させたビーズを、前記1,2ジオールまたは1,3ジオールと環状アセタールを形成できる放射線不透過性化学種の溶液と酸性条件下で混合する段階と、
(c)前記マイクロスフェアを抽出する段階と
を含む、方法。 - 抽出した前記マイクロスフェアを乾燥させる段階をさらに含む、請求項24に記載の方法。
- 反応が極性有機溶媒中で高温にて実施される、請求項24または25のいずれかに記載の方法。
- 前記放射線不透過性化学種がアルデヒド、アセタール、ヘミアセタール、チオアセタールおよびジチオアセタールからなる群より選択される官能基を含む、請求項24〜26のいずれかに記載の方法。
- 前記放射線不透過性化学種がヨウ素を含む、請求項24〜27のいずれかに記載の方法。
- 前記放射線不透過性化学種がヨード化アルデヒドである、請求項28に記載の方法。
- 前記放射線不透過性化学種がヨード化ベンジルアルデヒド、ヨード化フェニルアルデヒドまたはヨード化フェノキシアルデヒドである、請求項28に記載の方法。
- 前記放射線不透過性化学種が2,3,5−トリヨードベンズアルデヒド、2,3,4,6−テトラヨードベンジアルデヒドまたは2−(2,4,6−トリヨードフェノキシ)アセトアルデヒドである、請求項30に記載の方法。
- 前記予め形成されたヒドロゲルマイクロスフェアが、N−アクリロイル−アミノアセトアルデヒドジメチルアセタールによるPVAのアセタール化から形成されたペンデントアクテタート(actetate)基を有し2−アクリルアミド−2−メチルプロパンスルホン酸と架橋されているPVAを含む、請求項24〜31のいずれかに記載の方法。
- 請求項1〜14のいずれかに記載のヒドロゲルまたは請求項15もしくは16のいずれかに記載の組成物を患者の血管中に投与して前記血管を閉塞する、治療方法。
- 前記血管が固体腫瘍に関連する、請求項33に記載の方法。
- 前記腫瘍が肝細胞癌である、請求項34に記載の方法。
- 血管の塞栓術に使用する、請求項1〜14のいずれかに記載のヒドロゲル。
- 血管の塞栓術に使用する、請求項15または16のいずれかに記載の組成物。
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JP2021520440A (ja) * | 2018-06-29 | 2021-08-19 | バイオコンパティブルズ ユーケー リミテッド | 放射線不透過性ポリマー |
JP7095112B2 (ja) | 2018-06-29 | 2022-07-04 | バイオコンパティブルズ ユーケー リミテッド | 放射線不透過性ポリマー |
JP2022118197A (ja) * | 2018-06-29 | 2022-08-12 | バイオコンパティブルズ ユーケー リミテッド | 放射線不透過性ポリマー |
JP7454757B2 (ja) | 2018-06-29 | 2024-03-25 | ボストン サイエンティフィック メディカル デバイス リミテッド | 放射線不透過性ポリマーを含む液体塞栓組成物 |
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JP7433301B2 (ja) | 2018-09-20 | 2024-02-19 | レヴァ メディカル、 エルエルシー | ドラッグデリバリーのための多孔質生体吸収性放射線不透過性塞栓ミクロスフェア |
JP2022518586A (ja) * | 2019-03-22 | 2022-03-15 | バイオコンパティブルズ ユーケー リミテッド | 塞栓マイクロスフェア及び方法 |
JP7391978B2 (ja) | 2019-03-22 | 2023-12-05 | バイオコンパティブルズ ユーケー リミテッド | 塞栓マイクロスフェア及び方法 |
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US9895452B2 (en) | 2018-02-20 |
US20210236660A1 (en) | 2021-08-05 |
US20200254117A1 (en) | 2020-08-13 |
CN105517582B (zh) | 2020-06-05 |
JP2022177153A (ja) | 2022-11-30 |
HK1214286A1 (zh) | 2016-07-22 |
EP3041516B1 (en) | 2021-10-20 |
GB201415730D0 (en) | 2014-10-22 |
CN105517582A (zh) | 2016-04-20 |
CN111518285B (zh) | 2023-09-22 |
JP6678319B2 (ja) | 2020-04-08 |
GB2523863B (en) | 2017-05-24 |
GB201315936D0 (en) | 2013-10-23 |
CA2922961C (en) | 2022-07-19 |
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