JP2020527545A - 標的化送達のための磁性ナノ粒子 - Google Patents
標的化送達のための磁性ナノ粒子 Download PDFInfo
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- JP2020527545A JP2020527545A JP2019572658A JP2019572658A JP2020527545A JP 2020527545 A JP2020527545 A JP 2020527545A JP 2019572658 A JP2019572658 A JP 2019572658A JP 2019572658 A JP2019572658 A JP 2019572658A JP 2020527545 A JP2020527545 A JP 2020527545A
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Abstract
Description
本出願は、2017年6月30日に出願された米国仮特許出願第62/527,274号の優先権および利益を主張し、その全開示内容は引用することにより本明細書の一部をなすものとする。
粒子は、印加された磁気勾配の作用下で組織関門を安全かつ効果的に横断するために、PLGAなどの生分解性および生体適合性の物質から構成される(特に、例示的な粒子は、体内に投与するために、FDAによって従前に認可された物質のみから構成される)。例示的なナノ粒子は、広いサイズ範囲(2〜50nm)の磁性コアを封入する能力を示す。ナノ粒子径は、意図される用途に基づいてカスタマイズすることができ、例示的な粒子は、サイズが直径100〜450nmの範囲である。ナノ粒子はまた、選択的な添加剤を組み込むことにより、カチオン性、アニオン性、または中性にされる。図3A〜図3Eは、例示的なナノ粒子の試料の電子顕微鏡画像を示す。各例示的なナノ粒子は、最終粒径を<450nmに維持しつつ、さまざまなサイズ(2〜50nmのサイズ、例えば5nm、10nm、または20nmのサイズ)の磁性コアを封入する能力を示す。例示的な粒子の対応する設計を図2A〜図2Gに示す)。
図7Aおよび図7Bは、ウシ眼への送達後の酸化鉄のプルシアン染色を示し、例示的なPLGA鉄酸化物ナノ粒子が(皮膚の上皮層と同様の、関門として作用する)眼の上皮層を横断し、この層の背後にある標的組織に進入できたことを実証した。送達された鉄酸化物の定量的量は、典型的には、ICP−MSまたはICP−OES(誘導結合型プラズマ質量分析法または光学的発光分光法)によって測定され、(1粒子当たりの鉄酸化物の量は予め測定されていたので)何個の粒子が標的に送達されたかの尺度を提供した。標的に送達された治療剤の量は、複数の方法によって測定することができ、典型的な事例では、本発明者らは、UPLC−MS(高速液体クロマトグラフィー質量分析)使用して、送達された薬物の量を測定した。これは、1粒子当たりの治療剤の量も予め測定されていたので、何個の粒子が標的に送達されたかの尺度を提供する。
本実施例は、30〜60g/モルの重量範囲のPLGA分子を有する粒子を含む。この分子量範囲は、7日間〜3ヶ月間の所要の薬物放出を達成することができる。PLGA粘度は、約0.55〜0.75dL/gであった。ナノ粒子径は約100〜500nmの範囲であり、治療剤放出は10日間〜1ヶ月間であった。PLGAは、官能基として、A=薬物/治療剤の迅速な放出(<3ヶ月)を達成するためにはカルボキシル(COOH)、B=長期作用放出(LAR)システム(>3か月)用のナノ粒子を開発するためにはエステルを有し、LGAゼータ電位:−5〜−30mVを有する。これは、ナノ粒子の効率的なコロイド安定性に帰する。
本実施例は、鉄酸化物ナノコアを有し、PLGAマトリックス中に治療剤が装填され、正に帯電したリン脂質および界面活性剤PVA(ポリビニルアルコール)によって安定化され、凍結乾燥(急速冷凍)され、そして、滅菌のためにγ線またはe−ビームが照射された、カチオン性PLGA(ポリ乳酸−コ−グリコール酸)ナノ粒子を含む。
本実施例は、鉄酸化物ナノコアを有し、PLGAマトリックス中に治療剤が装填され、界面活性剤PVA(ポリビニルアルコール)によって安定化され、凍結乾燥(急速冷凍)され、そして滅菌のためにγ線またはe−ビームが照射された、PLGA(ポリ乳酸−コ−グリコール酸)+ポリメタクリレート系コポリマー(オイドラギット、RLPO)の混合物であるナノ粒子を含む。
図6は、実施例によるナノ粒子の製造プロセスが以下の工程を含むことを示す概念図である。
例示的な粒子からの薬物放出を測定するための例示的なプロセスでは、凍結乾燥粒子のストック溶液(1mg/ml)を、人工脳脊髄液(aCSF、pH7.4)に配置し、直ちにガラスバイアルに等量(1ml)ずつ移した。次いで、試料を、37℃の一定温度で、振とう器/インキュベータ中に配置した。例示的な時間間隔(例えば、0、0.5、1、4、9、24、48、および72時間)で、製剤バイアルを(例えば、n=2で重複させて)取り出し、18,000gで10分間遠心分離した。HPLC分析のために、上清溶液をペレットから分離し、等量のアセトニトリルと混合した。例示的な粒子は、治療剤の迅速な放出(数分または数時間内)、または治療剤の徐放放出(数週間または数ヶ月内)を有するように設計および合成された。
Claims (18)
- 組織を横切ることができるナノ粒子であって、
酸化鉄コアと、
第1の治療剤と、
ポリマーコーティングとを含み、前記コーティングは、約37度で水中で分解する、ナノ粒子。 - 前記コアは、直径3〜30ナノメートルである、請求項1に記載のナノ粒子。
- 前記コアは、直径10〜100ナノメートルである、請求項1記載のナノ粒子。
- 前記コーティングは、PLGAである、請求項1に記載のナノ粒子。
- 前記コーティングは、ポロキサマーコーティングである、請求項1に記載のナノ粒子。
- 第2の治療剤をさらに含む、請求項1に記載のナノ粒子。
- 前記第1の治療剤は、シプロフロキサシンである、請求項1に記載のナノ粒子。
- 前記第1の治療剤は、フルオシノロンアセトニドである、請求項1に記載のナノ粒子。
- 前記第1の治療剤は、デキサメタゾンである、請求項1に記載のナノ粒子。
- 患者を治療するための方法であって、
ナノ粒子の凍結乾燥組成物を提供するステップと、
前記ナノ粒子を再構成するステップと、
前記ナノ粒子を部位に適用するステップと、
磁気勾配を使用して、標的部位に前記ナノ粒子を移動させるステップと、を含む、方法。 - 治療剤を対象に提供するための方法であって、それを必要とする対象に第1の治療剤および磁性コアを含む磁性ナノ粒子を投与するステップと、磁気勾配を使用して、標的部位に前記ナノ粒子を移動させるステップと、を含む、方法。
- 磁石を使用して前記対象内で前記粒子を方向付けるステップをさらに含む、請求項1に記載の方法。
- ナノ粒子の組成物であって、前記ナノ粒子は、凍結乾燥されている、ナノ粒子の組成物。
- 第1の薬剤および第2の薬剤を有するナノ粒子組成物を調製するための方法であって、
a.前記第1の薬剤間に疎水性イオン複合体を形成するステップと、
b.前記疎水性イオン複合体の形成後に前記第2の薬剤を添加するステップと、を含む、方法。 - 凍結乾燥医薬組成物であって、
a.酸化鉄コア、第1の治療剤、およびポリマーコーティングを有する、組織を横切ることができるナノ粒子であって、前記コーティングは、約37度で水中で分解する、ナノ粒子と、
b.前記ナノ粒子の周囲の糖と、を含む、凍結乾燥医薬組成物。 - 乳化ポリマーと、界面活性剤と、磁性コアと、第1の生物学的活性剤と、第2の生物学的活性剤と、を含む、ナノ粒子であって、前記第1の生物学的活性剤は、複合体化されて、疎水性イオン複合体を形成している、ナノ粒子。
- 前記組成物を凍結乾燥するステップをさらに含む、請求項14に記載の方法。
- 放射線を使用して、前記組成物を滅菌するステップをさらに含む、請求項14に記載の方法。
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- 2018-06-30 BR BR112020003956-0A patent/BR112020003956A2/pt not_active Application Discontinuation
- 2018-06-30 US US16/627,677 patent/US20200146995A1/en not_active Abandoned
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EP3645004A1 (en) | 2020-05-06 |
AU2018291045A1 (en) | 2020-02-13 |
US20200146995A1 (en) | 2020-05-14 |
WO2019006440A1 (en) | 2019-01-03 |
CA3069671A1 (en) | 2019-01-03 |
BR112020003956A2 (pt) | 2021-08-03 |
JP2024028827A (ja) | 2024-03-05 |
CN111032023A (zh) | 2020-04-17 |
EP3645004A4 (en) | 2021-05-05 |
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