JP2022511307A - αコネキシンC末端ペプチドを用いるナノ粒子製剤およびその方法 - Google Patents
αコネキシンC末端ペプチドを用いるナノ粒子製剤およびその方法 Download PDFInfo
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Abstract
Description
本出願は、2018年9月12日出願の米国仮出願番号第62/730,116号に対する優先権を主張するものであって、その全てを参照により本明細書に組み込むものである。
本発明は、アメリカ国立衛生研究所の助成金を受け、政府支援の下に行われた(Grant No. R43 CA195937、およびGrant No. R43 CA195937)。米国政府は、本発明における一定の権利を有する。
本開示において電子データで提出したテキストファイルの内容は、その全てを参照により本明細書に組み込むものである。コンピューターで読み取り可能な形式の配列表のコピー(ファイル名: FIRS_008_01WO_SeqList_ST25.txt、記録日: February September 12, 2019、ファイルサイズ: 34 kilobytes)。
本開示は、αCT1ペプチド含有ナノ粒子製剤、ならびにαCT1含有ナノ粒子製剤によるがんおよびその他の適応症の治療に関する。
(a)有機溶媒に溶解した生分解性または生体適合性ポリマーを1つ以上含む第1溶液を、第1水性溶媒に溶解したSEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列を有する第2溶液と混合し;
(b)ステップ(a)の混合物をエマルジョン化し;
(c)ステップ(b)のエマルジョンを、第2水性溶媒に溶解した生分解性または生体適合性ポリマーを1つ以上含む第2溶液に加え;
(d)有機溶媒を除去し;および
(e)適宜(d)の生成物を精製するステップ
を特徴とする方法を提供する。一部の実施態様において、上記方法はさらに、(d)または(e)の生成物を凍結および/または凍結乾燥する、(f)のステップを含む。一部の実施態様において、ステップ(a)の生分解性または生体適合性ポリマーは、PLGAである。一部の実施態様において、ステップ(c)の生分解性または生体適合性ポリマーは、さらにPVAを含む。
(a)
i. 水混和性有機溶媒に溶解したSEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列および1以上の生分解性または生体適合性ポリマー;および
ii.貧溶媒を加え;
(b) 水混和性有機溶媒に溶解したSEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列および1以上の生分解性または生体適合性ポリマーを、貧溶媒と共に混合してナノ粒子組成物を形成し;および
(c) (b)の生成物を適宜精製するステップ
を特徴とする方法を提供する。一部の実施態様において、上記方法はさらに、(b)または(c)の生成物を凍結および/または凍結乾燥する、(d)のステップを含む。一部の実施態様において、ステップ(a)の生分解性または生体適合性ポリマーは、PLGAである。一部の実施態様において、ステップ(a)の生分解性または生体適合性ポリマーは、さらにPVAを含む。
a) パラベンが完全に溶解するまで、プロピレングリコール、グリセリン、メチルパラベンおよびプロピルパラベンを混合し;
b) 別の容器中、透明溶液が得られるまで精製水、EDTA、リン酸二水素ナトリウム、リン酸水素二ナトリウムおよびD-マンニトールを混合し;
c) a)の溶液をb)の溶液に加え、a)の溶液の容器を精製水で濯ぎ、その濯いだ溶液を混合溶液に加え、混合溶液が視覚的に均一になるまで混合し;
d) ホモジナイザーで混合しながら、ヒドロキシエチルセルロースをc)の混合溶液に加え、ポリマーが十分に分散するまで混合し;
e) 別の容器中、精製水をSEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列と共にペプチドが完全に溶解するまで混合し;
f) e)の溶液をd)の溶液に加え、e)の溶液の容器を精製水で濯ぎ、その濯いだ溶液を混合溶液に加え、混合溶液が均一になるまで混合することを特徴とする方法を提供する。
コネキシンとは、細胞間情報伝達の機能を担うギャップ結合チャンネルのサブユニットタンパク質である(Goodenough and Paul, 2003)。ヌクレオチドの保存配列のパターンに基づいて、コネキシンタンパク質をコードする遺伝子は、αコネキシンおよびβコネキシンと呼ばれる2つのファミリーの遺伝子に分けられる。
一部の実施態様において、本開示は、1以上のナノ粒子を含む組成物を提供し、該ナノ粒子は、1以上の生分解性または生体適合性ポリマーおよび治療上有効量の本明細書に記載のαコネキシンポリペプチドを含む。一部の実施態様において、本開示は、1以上のナノ粒子を含む組成物を提供し、該ナノ粒子は、1以上の生分解性または生体適合性ポリマーおよび治療上有効量のSEQ ID NO:1に記載のアミノ酸配列を有するペプチドを含む。一部の実施態様において、ペプチドは、さらに細胞内輸送配列を有する。該細胞内輸送配列は、アンテナペディア、TAT、HIV-Tat、ペネトラチン、Antp-3A(Antp変異体)、ブフォリンII、トランスポータン、MAP(モデル両親媒性ペプチド)、K-FGF、Ku70、プリオン、pVEC、Pep-1、SynB 1、Pep-7、HN-1、BGSC(ビス-グアニジウム-スペルミジン-コレステロール)およびBGTC(ビス-グアニジウム-トレン-コレステロール)からなる群から選択されるタンパク質のアミノ酸配列を含んでもよい。一部の実施態様において、ペプチドは、SEQ ID NO:2に記載のアミノ酸配列を有する。
一部の実施態様において、本開示は、本開示のナノ粒子組成物を含む医薬製剤を提供する。
一部の実施態様において、本開示は、本開示のナノ粒子組成物の製造方法であって;
(a) 有機溶媒に溶解した1以上の生分解性または生体適合性ポリマーを含む第1溶液を、第1水性溶媒に溶解したSEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列を有する第2溶液と混合し;
(b) ステップ(a)の混合物をエマルジョン化し;
(c) ステップ(b)のエマルジョンを、第2水性溶媒に溶解した1以上の生分解性または生体適合性ポリマーを含む第2溶液に加え;
(d) 有機溶媒を除去し;および
(e) (d)の生成物を適宜精製するステップを特徴とする方法を提供する。
(a)
i.水混和性有機溶媒に溶解したSEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列ならびに1以上の生分解性または生体適合性ポリマー;および
ii.貧溶媒
を用意し;
(b) 水混和性有機溶媒に溶解したSEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列ならびに1以上の生分解性または生体適合性ポリマーを、ナノ粒子組成物が形成されるように貧溶媒と共に混合し;および
(c) (b)の生成物を適宜精製することを特徴とする方法を提供する。
a) プロピレングリコール、グリセリン、メチルパラベンおよびプロピルパラベンを、パラベンが完全に溶解するまで混合し;
b) 別の容器で、透明溶液が得られるまで、精製水、EDTA、リン酸二水素ナトリウム、リン酸水素二ナトリウムおよびD-マンニトールを混合し;
c) a)の溶液をb)の溶液に加え、a)の溶液の容器を精製水で濯ぎ、その濯いだ溶液を混合溶液に加え、混合溶液が視覚的に均一になるまで混合し;
d) ホモジナイザーで混合しながら、ヒドロキシエチルセルロースをc)の混合溶液に加え、ポリマーが十分に分散するまで混合し;
e) 別の容器で、ペプチドが完全に溶解するまで、SEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列を精製水と混合し;
f) e)の溶液をd)の溶液に加え、e)の溶液の容器を精製水で濯ぎ、その濯いだ溶液を混合溶液に加え、混合溶液が均一になるまで混合することを特徴とする方法を提供する。
一部の実施態様において、本開示は、がんの治療が必要な患者に対して、治療上有効量の本開示の医薬製剤を患者に投与することを含む、がんの治療方法を提供する。
PLGAは、様々な応用のための低分子ドラッグデリバリーにおいて用いられる。(非特許文献2~非特許文献4)PLGAは、骨格エステル結合が開裂する加水分解により数週間にわたって分解し、クレブス回路を介して体内で容易に代謝され、二酸化炭素および水として排出される、生物学的に適合する副生成物;乳酸およびグリコール酸を形成するため、低分子の制御放出に有用である。(非特許文献2、非特許文献4)
[全般]
購入した材料は、全てさらに精製することなく用いた。PLGA(ポリ(D,L-ラクチド-コ-グリコリド; 7000~17000MW、50:50 乳酸:グリコール酸(酸末端))、PVA(ポリビニルアルコール; 13000~23000MW、87~89%加水分解)、ローダミンB(RhB; HPLCグレード≧95%)、リン酸緩衝生理食塩粉末(PBS;脱イオン水中に溶解; 生化学研究用認証グレード、pH 7.4)、スクロース(BioUltra、分子生物学用、≧99.5%(HPLC))、トレハロース(医薬二次標準物質、認証標準物質)、およびウシ血清アルブミン(BSA;脂肪酸不含、グロブリン不含、≧99%、アガロースゲル電気泳動)をSigma Aldrichから購入した。酢酸エチル(EA; HPLCグレード)をFisher Scientificから購入した。ペプチド薬、α-コネキシンカルボキシル末端(αCT1)ペプチドをAmerican Peptide Company(現在のBachem; Sunnyvale、CA)で合成した。αCT1ペプチドは、アンテナペディア細胞内輸送配列(RQPKIWFPNRRKPWKK)と結合したコネキシン43のC末端(RPRPDDLEI)の短い配列に相当する。
シングルエマルジョンナノ粒子(SE-NP)の合成方法は、非特許文献12の方法を改変した。簡潔に言うと、PLGAをEAに溶解後、0.1mgのRhBをPLGA溶液に直接加え、その溶液をボルテックスで混合し、次いで2.5w/v%のPVA/水溶液(1mL)に加えた。この溶液をプローブ型のもので2分間ソニケーションした(振幅40%)。この溶液を素早く0.3w/v%のPVA/水(50mL)に加え、次いで少なくとも3時間撹拌し、EAを蒸発させた。
非特許文献12および非特許文献18で用いられた合成プロトコルを改変した。簡潔に言うと、αCT1(αCT1-NP)を含むダブルエマルジョン粒子(DE-NP)は室温で以下のように合成した。初めに0.025gのPLGAを1mLのEAにボルテックスで断続的に撹拌しながら30分間溶解した。次いで50μLのαCT1水溶液(2mmol)を加え、プローブ型ソニケーター(Qsonica Q55)を用いて振幅40%で2分間ソニケーションを行った。次いで最初のエマルジョンを素早く2.5w/v%のPVA/水溶液(1mL)にボルテックスで撹拌しながら滴下して加えた。次いでこの混合物を再度素早くプローブ型のもので2分間ソニケーションした(振幅40%)。得られたダブルエマルジョンを次いで0.3w/v%のPVA/水溶液(50mL)に移し、少なくとも3時間撹拌し、酢酸エチルを蒸発させた。ローダミンB-ナノ粒子またはBSA-ナノ粒子(RhB-NP、BSA-NP)に対し、αCT1溶液の代わりにローダミンBまたはBSA水溶液(2mmol)を用いて、同様のプロトコルを行った。細胞培養実験に用いられる粒子は、25mmナイロン無菌シリンジフィルター(Fisherbrand、孔径0.2μm)を用いた濾過、または全ての物質を使用前に滅菌し、無菌安全キャビネット中で粒子合成を行うことにより滅菌した。次いで粒子を遠心分離法で3回洗浄して過剰なPVAを除去し、-20℃以下で凍結し、凍結乾燥し、次いで-20℃で保管した。
走査電子顕微鏡(SEM)は、Nanoscale Characterization and Fabrication Laboratory(Blacksburg、VA)にて、LEO(Zeiss)電界放出形走査電子顕微鏡を用いて行った。SEM画像の解析は、ImageJ softwareを用いて行った。動的光散乱(DLS)およびゼータ電位は、Malvern Zetasizer Nano-ZSを用いて測定した。ローダミンの放出を調査するためのUV-vis吸光度は、Cary 60 UV-Vis分光光度計(Agilent Technologies)を用いて測定した。
凍結乾燥したナノ粒子を0.01M PBS溶液(1mg/mL)に再懸濁し、放出測定の間37℃でインキュベートした。各経過時点で、粒子を遠心分離して沈殿させ、上清を薬物含量分析のために回収した。一定濃度を維持するため、除去した上清分と同体積の新しいPBS溶液を加え、10~15分間超音波浴でソニケーションし、粒子を再分散した。分散液のサンプルをとり、動的光散乱(DLS)で分析した。粒子懸濁液の液滴を、SEMスタブ上に貼り付けれらたシリコンウェーハ部分に乗せ、後のSEMサンプルを調製した。
ヒト神経膠芽腫(GBM)細胞株SF295を、10%ウシ胎児血清(Atlas Biologicals, Inc.)、ストレプトマイシン(100μg/mL)およびペニシリン(100IU/mL)を補足した、ダルベッコ改変イーグル培地(Thermo Scientific)で培養した。前述したように(非特許文献9)、Carilion Clinicで手術を受けたGBM患者から単離したヒトGBM幹細胞(GSC)VTC-037およびLN229/GSCは、Gibco(登録商標)B-27(登録商標)サプリメント(Thermo Scientific)、線維芽細胞増殖因子(ProSpec-Tany TechnoGene Ltd.、20ng/mL)、および上皮細胞増殖因子(ProSpec-Tany TechnoGene Ltd.、20ng/mL)を補足した、ダルベッコ改変イーグル培地で培養した。
インビトロおよびインビボアッセイでペプチド追跡が可能になるように、アミノ末端ビオチンタグをαCT1配列に加えた。ビオチンタグの付いたαCT1のインビトロ放出は、OptEIAキット(BD Biosciences)を用いて、サンドイッチ結合免疫吸着アッセイ(ELISA)により測定した。Nunc MaxiSorpTM96ウェルマイクロプレート(Thermo Scientific)の各ウェルを、抗C末端コネキシン43抗体(1μg/mL、Sigma-Aldrich)を含むコーティング緩衝液でコーティングし、一夜4℃でインキュベートした。次いでウェルを洗浄し、1%ウシ血清アルブミンで室温中2時間ブロッキングした。標準物質としてビオチンタグの付いたαCT1の段階希釈液およびインビトロ放出測定から異なる時間で回収したビオチンタグの付いたαCT1を含むサンプルを、対応するウェルに加え、一夜4℃でインキュベートした。次いでウェルを洗浄し、ニュートラアビジン標識HRP(1μg/mL、Thermo Scientific)を1時間室温で加えた。洗浄後、3,3',5,5'-テトラメチルベンジジン(TMB)発色基質溶液を加え、室温の暗所で10分間反応させ、マイクロプレートリーダー(Molecular Devices)を用いてOD650の吸光度を測定した。次いで2M硫酸を加えてこの反応を止め、マイクロプレートリーダーを用いてOD450の吸光度を測定した。全ての測定は3回行った。
細胞を、6ウェルプレートまたは35mmガラスボトムディッシュ(Mat-Tek)に播種し、孔径0.45mmで濾過し、凍結乾燥したRhB-NPまたはαCT1-NPを、PBSに再懸濁し、異なる濃度で培地に加えた。一夜インキュベーション後、次いで細胞をPBSで5回洗浄し、新しい培地を補充し、EVOSTM FL Auto Imaging System(Thermo Scientific)を用いて、位相差顕微鏡および蛍光顕微鏡により様々な時間で観察するか、または20分間4%パラホルムアルデヒドで様々な時間で固定し、3%BSAブロッキング溶液中のTriton X-100(0.1%)で2時間室温で透過処理した。免疫染色を抗C末端コネキシン43抗体(Sigma-Aldrich、1:3000)で行い、Alexa Fluor(登録商標)488標識二次抗体(Thermo Scientific、1:500)を用いて検出した。ビオチンタグの付いたαCT1を、Alexa Fluor(登録商標)647標識ストレプトアビジン(Thermo Scientific、1:500)で検出した。Alexa Fluor(登録商標)488標識小麦胚芽凝集素(WGA)(Thermo Scientific、1:500)を用いて細胞膜を染色した。Gold褪色防止剤をProLong DAPI(Thermo Scientific)と共に用いて、スライドガラスに封入した。細胞をOpterra共焦点蛍光顕微鏡(Bruker)下で脱アミノ化した。
[粒子径最適化]
ローダミンBおよびαCT1を封入したPLGAナノ粒子を合成した。初めのダブルエマルジョン粒子は、最初のエマルジョン中のPLGA(0.05g)およびEA(2mL)および二次エマルジョン中の5w/v%のPVAを用いて作製した。しかしながら、滅菌のために0.2μmでの濾過が必要であるため、合成操作には粒子の大半が0.2μm未満になるまで粒子径を減少させるための最適化が必要であった。PLGA、酢酸エチル、およびPVAの量を、粒子の大きさを最適化するために変更した。また、PLGAをそのガラス転移温度(Tg)未満に保ち、NPの合体を避けるために高エネルギー超音波照射中で冷浴を行った。最後に、粒子径最適化中、αCT1がどのように粒子径を変化させ得るかを上手く模倣するために、嵩高さを利用して、BSA(2mM水溶液)を薬物模倣体として用いた。
次に、薬物ロードおよび放出の最初の見積もりを、シングルエマルジョンおよびダブルエマルジョン粒子の両方で行った。表8では、シングルエマルジョンおよびダブルエマルジョン粒子のロード含量およびカプセル化効率を比較している。式1を用いて計算した薬物含有量は、シングルエマルジョンおよびダブルエマルジョンの両方で類似していた。しかしながら、式2を用いて計算した薬物封入率は、シングルエマルジョンと比較してダブルエマルジョンの方が高かった。また、図2は、シングルエマルジョンおよびダブルエマルジョン粒子の薬物放出プロファイルを示す。シングルエマルジョンの合成法を用いて製造された粒子は、7日間にわたってより多量のローダミンをバースト放出し、ダブルエマルジョン粒子に比べてより素早く放出し終わり、7日後に94%のローダミンを放出した。
粒子を乾燥状態にしておくために、粒子の長期保存には凍結乾燥が用いられる。RhB-NPおよびαCT1-NPは、PLGAのTg未満に粒子を保ち、粒子を早く劣化させる湿気に対する暴露を可能な限り減らすために凍結保存した。凍結乾燥するために、溶液中の粒子は最初に凍結する必要がある。臨床試験に用いる前に、粒子を脱イオン水またはPBS緩衝溶液に再懸濁し、粒子が無菌キャビネット中で合成されていない場合、0.2μmで濾過して滅菌されるべきである。
保管中のNPの大きさの変化を減少させるために、抗凍結剤パラメーターを最適化後、αCT1-NP対するロードおよび分解の研究が行われた。分析前に粒子を0.2μmのフィルターで濾過した。薬物ロード量は質量で表すと962±88ng(薬物)/mg(粒子)、割合で表すと0.0962±0.0088%であり、カプセル化効率は0.000966±0.00049%であった。誤差は、少なくとも3つのサンプルの標準偏差である。凍結乾燥後のαCT1-NPのゼータ電位は、-23mVであった。αCT1の封入量はRhB-NPの封入量の約1μg/mg(粒子)より多いように見えるが、RhB-NPおよびαCT1-NPの薬物ロード率は0.1%未満である。
様々な濃度でVTC-037 GSCに加えたRhB-NPは、少なくとも300μg/mLのNPが細胞プレート付着に影響せずに細胞に添加され得ることを示した(図5A)。この濃度を次いで3週間の細胞培養に用いて、RhB-NPの分解およびその細胞への影響、ならびにRhBが細胞内にどれほどの期間留まり得るかの経過を調査した(図5B)。1週間の放出で、大量のRhBが細胞内に存在する。10日目にトリプシン処理で細胞を継代した後においても、14日間および21日間RhBシグナルが細胞内で検出される。
ダブルエマルジョン法(水/油/水エマルジョン)は欠点がある(例えばαCT1-NPのロードプロファイルのカプセル化効率が~1%)一方、シングルエマルジョン合成NPは凝集傾向を示す。そのため、この目的を拡大して、別の合成法を探求する必要がある。調査した別の方法には、i.)αCT1ではなくポリマーを効率的に溶解する間に素早く蒸発する無毒有機溶媒の最適化、ii.)ペプチドが外側水層に拡散する時間を短くするために、溶媒除去を促進する回転蒸発の利用、iii.)カプセル化効率を上げ、高密度で均一な球面を製造するために、酸化亜鉛またはカルシウムの外層への添加が挙げられる。また、臨床用輸送および製品化のための重要な長期保管および輸送を目的としたナノ粒子を保存するための凍結乾燥および凍結法も最適化された。凍結および凍結乾燥プロトコルの間にスクロースを抗凍結剤として添加することで、粒子凝集をうまく防止できた。
次の評価パラメーター:ナノ粒子径および形態(走査電子顕微鏡(SEM)を用いて調査した)、αCT1のカプセル化効率、およびαCT1およびローダミンBの効率および放出;によりαCT1が完成され、NPを制御し、臨床用開発および商業化のためのαCT1-NPのフラッシュナノ沈殿法(混合には4ジェットミキサーおよび>1%のポリビニルアルコール(PVA)(w/v)を用いる)が確立された。
混合中、4ジェットミキサーおよびPVAを用いて、フラッシュナノ沈殿で製造したナノ粒子は、その他の方法と比較して、αCT1-NPの大きさがより均一な~180nmであり、ほとんど凝集しなかった。ナノ粒子径および形態は、走査電子顕微鏡(SEM)を用いて調査した。これはナノ粒子の形態および大きさが均一に分布することで、物理化学的性質が最適化されαCT1放出に関するより一貫性のある結果が得られるため、重要である。粒子径は、動的光散乱法を用いてZetasizer Nano ZSで測定した。ロード効率および細胞内への取り込みに最適なナノ粒子径は100~300nmであり、CED送達に最適なナノ粒子径は<150nm±40である。αCT1-NPは、目立った細孔またはひびのない滑らかな表面、および平均径100~200nmを示した(図11)。混合中にPVAを添加(0.3~2.5%)することで、より小さい粒子径が得られた。
[GBM細胞へのαCT1-NP取り込み分析]
αCT1-NPの細胞内への取り込みは、インビトロのヒトGBM細胞で評価された。細胞内のαCT1-NPの存在は、共焦点顕微鏡を用いた、i.)ローダミンB(ナノ粒子の存在)およびii.)αCT1ペプチドの検出により評価される。異なる濃度(20~300μg/mLの範囲)のローダミンBで標識されたαCT1-NPを、ヒトGBMおよび正常星状膠細胞株の培地に加えた。細胞を5回PBSで洗浄し、1~24の異なる経過時点で固定し、蛍光顕微鏡で分析した。蛍光小麦胚芽凝集素(WGA)Alexa Fluor(登録商標)488が細胞膜の染色に用いて各細胞の周囲長を同定し、DAPIを用いて核を染色した。
TMZ治療に対して脳腫瘍を感作させるαCT1ロード生分解性粒子のインビボ治療薬が評価された。マウス脳におけるαCT1-NPの生体内分布を評価し、続いて異種移植GBMモデルにおいてTMZと組み合わせたαCT1-NPのマイクロインジェクションおよび治療効果を分析した。
マイクロインジェクションで投与された、生分解性無菌αCT1ロードPLGAナノ粒子は、注射部位の近くで検出され、毒性を伴わないことが分かった。TMZ治療と組み合わせたαCT-NPの腫瘍内投与は、GBMマウスモデルにおいて有意に腫瘍体積を減少させる有効性を示した。
ローダミンB(濃度1mg/mL)で標識されたビオチンタグ付きαCT1-NP(3μL)を、マイクロインジェクションポンプを用いてマウス脳内に注入した。非標識NPをネガティブコントロールとして注入した。マウスの脳を1日後および1週間後に回収した。脳を回収し、スクロースで凍結保護して凍結した後、OCTで包埋した。さらに、他の臓器(肺、心臓、および肝臓など)から得た血液および組織を別の分析のために回収した。Rhod-NPは、1日後および1週間後の注射部位に近い脳の切片で検出された(このデータはスペースの関係上掲載されていない)。処置したマウスにおいて決定的に有害な反応は観測されなかった。これは神経生体行動評価における変化も、αCT1 PLGA-NP投与に伴う神経有害性または全身有害性も認められなかったことをいう。
インビボでの安全性およびαCT1-NPの有効性を評価するために、GBMのマウス異種移植モデルを用いた。U87MG GBM細胞を培養し、1x106細胞をMatrigel(登録商標)マトリックス(100μL)と混合し、麻酔したSCID/beigeマウスの側腹部に23ゲージ針を用いて皮下注射した。8日後、ネズミを2つのグループ:(i)TMZのみ、および(ii)TMZ+αCT1粒子に分けた。治療レジメンは次の通りに行った。TMZ(7.5mg/kg)を腹腔内注射により投与し、グループ1および2の両方のマウスに対して、インスリン注射を8日目から隔日で行った。-80℃で保管したαCT1粒子を1倍のPBSに再溶解して、100μLずつに調製し、-20℃で保管した。粒子の1回投与量(100μL)で送達されるαCT1の濃度は、1.2mg(粒子)/kg(マウス体重)で、約8μMであった。インスリン注射を用いたグループ2のマウスに対し、腫瘍増殖部位にαCT1粒子を10日目から隔日で投与した。グループ2のマウスは、治療期間に合計6回の粒子の注射を受けた。この治療レジメンは、13日間続いた。腫瘍の大きさをノギスを用いて隔日で測定した。腫瘍体積を計算した((長さx幅2)/2)。TMZ+αCT1-NPでの治療により、有意な腫瘍体積の減少が見られた(図16)。
Claims (77)
24時間後に、封入されたペプチド全体の約5%~60%を放出し、
21日後に、封入されたペプチド全体の約50%~100%を放出する
パターンに対応する、制御されたペプチドの放出プロファイルを示す、前述の請求項のいずれかのナノ粒子組成物。
(a) 有機溶媒に溶解した1以上の生分解性または生体適合性ポリマーを含む第1溶液を、第1水性溶媒に溶解したSEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列を有する第2溶液と混合し;
(b) ステップ(a)の混合物をエマルジョン化し;
(c) ステップ(b)のエマルジョンを、第2水性溶媒に溶解した1以上の生分解性または生体適合性ポリマーを含む第2溶液に加え;
(d) 有機溶媒を除去し;および
(e) (d)の生成物を適宜精製する
ステップを特徴とする、方法。
(a)i. SEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列および水混和性有機溶媒に溶解した1以上の生分解性または生体適合性ポリマー;および
ii. 貧溶媒を用意し;
(b) SEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列および水混和性有機溶媒に溶解した1以上の生分解性または生体適合性ポリマーを、ナノ粒子組成物が形成されるように貧溶媒と共に混合し;および
(c) (b)の生成物を適宜精製することを特徴とする、方法。
a) プロピレングリコール、グリセリン、メチルパラベンおよびプロピルパラベンを、パラベンが完全に溶解するまで混合し;
b) 別の容器中、精製水、EDTA、リン酸二水素ナトリウム、リン酸水素二ナトリウムおよびD-マンニトールを透明溶液が得られるまで混合し;
c) a)の溶液をb)の溶液に加え、a)の溶液の容器を精製水で濯ぎ、その濯いだ溶液を混合溶液に加え、混合溶液が視覚的に均一になるまで混合し;
d) ホモジナイザーで混合しながら、ヒドロキシエチルセルロースをc)の混合溶液に加え、ポリマーが十分に分散するまで混合し;
e) 別の容器中、SEQ ID NO:1またはSEQ ID NO:2に記載のアミノ酸配列を精製水でペプチドが完全に溶解するまで混合し;
f) e)の溶液をd)の溶液に加え、e)の溶液の容器を精製水で濯ぎ、その濯いだ溶液を混合溶液に加え、混合溶液が均一になるまで混合することを特徴とする、方法。
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JP7145163B2 (ja) * | 2017-02-16 | 2022-09-30 | ファーストストリング・リサーチ・インコーポレイテッド | 放射線障害を予防し、組織再生を促進するための組成物および方法 |
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2019
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JP2015513549A (ja) * | 2012-03-01 | 2015-05-14 | ファーストストリング・リサーチ・インコーポレイテッドFirststring Research,Inc. | アルファコネキシンc末端(act)ペプチド含有局所用ゲル剤 |
US20160166637A1 (en) * | 2013-08-02 | 2016-06-16 | Virginia Tech Intellectual Properties, Inc. | Methods of treating a cancer through targeted disruption of alpha connexin 43-zonula occludens-1 (zo-1) interaction |
JP2017526687A (ja) * | 2014-08-22 | 2017-09-14 | オークランド ユニサービシーズ リミティド | チャネル調節剤 |
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CN112969451A (zh) | 2021-06-15 |
US20210361741A1 (en) | 2021-11-25 |
EP3849528A4 (en) | 2023-07-26 |
IL281377B1 (en) | 2024-09-01 |
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BR112021004731A2 (pt) | 2021-09-08 |
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