JP2015527391A - ヒアルロン酸をベースとする薬物送達システム - Google Patents
ヒアルロン酸をベースとする薬物送達システム Download PDFInfo
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- JP2015527391A JP2015527391A JP2015531047A JP2015531047A JP2015527391A JP 2015527391 A JP2015527391 A JP 2015527391A JP 2015531047 A JP2015531047 A JP 2015531047A JP 2015531047 A JP2015531047 A JP 2015531047A JP 2015527391 A JP2015527391 A JP 2015527391A
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- 238000011065 in-situ storage Methods 0.000 description 1
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Abstract
Description
本出願は、米国特許法119条(e)に基づいて、参照により全体として本明細書に組み込まれている、2012年9月6日に出願した米国仮出願第61/697,296号(発明の名称:「Hyaluronic Acid−Based Drug Delivery Systems」)の優先権の利益を主張するものである。
のPEGDEである。
a)官能化HAに官能部分を提供するステップであって、該官能部分が架橋のためのものであるステップと、
b)該官能化HAを、場合によって架橋剤の存在下で架橋させるステップと
を含み、
該架橋が装填ベシクルの存在下で行われ、
架橋剤が存在しない場合には該官能部分が架橋剤として作用する。
のPEGDEである。
本発明のHAヒドロゲルを含む医薬製剤は、投与方法に応じて好適な賦形剤を用いて適宜に調製することができる。好適な医薬製剤は、錠剤、カプセル剤、液剤、例えば、注射剤、懸濁剤、クリーム剤の形態であることができる。
本明細書中で使用する用語「C10〜C22アルキル」は、10〜22個の炭素原子をそれぞれ含む飽和、直鎖または分枝鎖炭化水素基などを指す。C10〜C22アルキル基の例としては、C10アルキル基、C12アルキル基、例えば、ラウリル基、C14アルキル基、C16アルキル基が挙げられるが、これらに限定するものではない。
Ltpは、疎水性薬物である。Ltp装填EPCリポソームを作るために、濃度0.5mMのLtpおよび10mm EPCを、丸底フラスコ中でクロロホルム:メタノールの2:1(v/v)の比の混合溶媒に溶解させた(薬物対脂質比0.05)。薬物−脂質溶液を手動で混合し、水浴中で40℃に保持されたロータリーエバポレーターを用いて2時間かけてフラスコから溶媒を除去した。薄い乾燥した薬物−脂質フィルムが得られた。このフィルムを、PBS(pH7.4)緩衝液を用いて水和させた。このフィルムを、60℃に保持された水浴中で10〜15分間手動で振盪することによって、完全に水和させて、多重膜ベシクル(MLV)を形成した。MLV懸濁液を、卓上押出機に装着されたサイズ0.2μmおよび0.08μmのポリカーボネートフィルターに通して15回押出して、EPCの大きいLtp装填単層膜ベシクル(LUV)(サイズ約100nm)を得た。
凍結乾燥HA−MA 20mgまたは40mgを取り、Ltp装填EPCリポソーム懸濁液1ml中に直接的に溶解させ、室温で終夜撹拌して、それぞれ2%(w/v)または4%のHA−MA溶液を調製した。
凍結乾燥HA−ADH 40mgを取り、Ltp装填EPCリポソーム懸濁液1ml中に直接的に溶解させ、室温で終夜撹拌して、4%(w/v)のHA−ADH溶液を調製した。
材料: キトサン100kDa(US試料)、キトサン(Sigma:20〜200cp)、トリポリリン酸ナトリウム(TPP)、親水性薬物(5−FU)
§ 1%酢酸中1mg/mLキトサン−5FU(親水性薬物)溶液を調製し、0.22μmフィルターを用いて濾過する(100mL)
§ 超純水中トリフェニルホスフィン(TPP)濃度0.5mg/mLを調製し、0.22μmフィルターを用いて濾過する(50mL)
§ 5M NaOHを加えることによって、キトサン溶液のpHを4.6〜4.8に調整する
§ IKAオーバーヘッドスターラーを用いて1200rpmで撹拌しながらTPP溶液をキトサン溶液に30分かけて滴加し、撹拌を30分間続ける
§ 溶液を25000rpmで遠心分離し、ペレットを再分散させ、Malvernゼータサイザーを用いてサイズを測定する
EggPCは、リポソームを形成する脂質である。ラタノプロスト(Ltp)は、文献に記載されている標準的な方法を用いてeggPC中に装填した。次いで、これらのリポソームをHA−ADHおよびエポキシ架橋剤PEGDEと混合し、終夜放置した。次いで、ラタノプロストの放出を定量化した。ラタノプロスト(リポソームなし)が装填されたHAヒドロゲルを調製した。次いで、ラタノプロストの放出を定量化した。
5−FUが装填されたPLGAミクロ粒子を、ダブルエマルション技術によって調製した。次いで、ミクロ粒子を凍結乾燥し、HA前駆体溶液(HA−MA)中に分散させた。Irgacure(登録商標)を開始剤として使用した。続いて、UV架橋を行って、内部に5−FU装填PLGAミクロ粒子が分散されているHAヒドロゲルを生成した。バッチ製剤を、表1に開示する。
疎水性薬物をゲル中に組み込んでから架橋させ、この放出プロフィールを測定した。加えて、同一の疎水性薬物を含有するリポソームもまた、ゲル前駆体中に組み込んでから架橋させ、結果としての放出プロフィールもまた、定量化した。特に、ラタノプロストを薬物として使用し、HA−MAをHA官能化部分として使用した。ヒドロゲルは、4%(w/v)HA−MAヒドロゲルである。データを図6に示す。
Claims (29)
- 内部に分散された装填ベシクルを含むヒアルロン酸(HA)ヒドロゲルであって、該装填ベシクルは1種もしくは複数の薬物、1種もしくは複数のタンパク質または1種もしくは複数の核酸が装填されているHAヒドロゲル。
- 前記装填ベシクルが、ミセル、リポソームおよび/またはナノ粒子もしくはミクロ粒子から選択される粒子から選択される、請求項1に記載のHAヒドロゲル。
- 前記ミセルが、両親媒性自己集合性分子から作られている、請求項1または2に記載のHAヒドロゲル。
- 前記ベシクルがリポソームである、請求項1または2に記載のHAヒドロゲル。
- 前記自己集合性分子が、ポリマーおよび界面活性剤、好ましくはブロックコポリマー、より好ましくはPluronic(登録商標)ブロックコポリマーから選択される、請求項1から4のいずれか一項に記載のHAヒドロゲル。
- 前記粒子が、キトサンナノ粒子、キトサンミクロ粒子、ポリ(乳酸−co−グリコール酸)(PLGA)ナノ粒子およびポリ(乳酸−co−グリコール酸)(PLGA)ミクロ粒子から選択される、請求項1から5のいずれか一項に記載のHAヒドロゲル。
- 前記薬物が、疎水性または親水性薬物から選択され、好ましくは抗生物質、化学療法薬、緑内障または高眼圧の治療のための薬物、例えば、ラタノプロストまたは5−フルオロウラシル(5−FU)から選択され、前記タンパク質が、治療用ペプチドもしくはタンパク質またはモノクローナル抗体、抗VEGF抗体、例えば、ベバシズマブおよびラニビズマブから選択され、前記核酸が、siRNAおよびプラスミドDNAから選択される、請求項1から6のいずれか一項に記載のHAヒドロゲル。
- 共有結合によって架橋されたヒドロゲルである、請求項1から7のいずれか一項に記載のHAヒドロゲル。
- 前記ヒドロゲルにおいて、
a)架橋のために官能化された官能化HAが、架橋剤によって相互に結合されている、または
b)官能化HAで、官能化基が架橋剤である、
請求項1から8のいずれか一項に記載のHAヒドロゲル。 - 前記官能化HAが、メタクリレート−HA(HA−MA)またはアジピン酸ジヒドラジドHA(HA−ADH)から選択される、請求項1から9のいずれか一項に記載のHAヒドロゲル。
- 前記架橋剤が、ポリ(エチレングリコール)ジグリシジルエーテル(PEGDE)である、請求項1から10のいずれか一項に記載のHAヒドロゲル。
- HA−MAヒドロゲル、HA−ADHヒドロゲル、PEGDE架橋HA−ADH−ヒドロゲル、PEGDE架橋HA−MA−ヒドロゲルから選択される、請求項1から10のいずれか一項に記載のHAヒドロゲル。
- 前記HAヒドロゲル中に分散された装填ベシクルの量が、全HAヒドロゲルの1〜40重量%である、請求項1から12のいずれか一項に記載のHAヒドロゲル。
- 前記a)における前記架橋剤のモル数が、効果的に官能化されたHAのモル数の2〜10倍である、請求項9に記載のHAヒドロゲル。
- 前記装填ベシクルが、5−FUが装填されたPGLAナノ粒子、5−FUが装填されたPGLAミクロ粒子、またはラタノプロストが装填されたEggPCリポソーム、5−FUが装填されたキトサンナノ粒子、5−FUが装填されたキトサンミクロ粒子、パクリタキセルが装填されたPEG/PLAミセル、ドキソルビシンが装填されたリポソーム、siRNAが装填されたリポソーム、プラスミドDNAが装填されたリポソームから選択される、請求項1から14のいずれか一項に記載のHAヒドロゲル。
- 請求項1から15のいずれか一項に記載のHAヒドロゲルを調製するための方法であって、
a)官能化HAに官能部分を提供するステップであり、該官能部分が架橋のためのものであるステップと、
b)該官能化HAを、場合によって架橋剤の存在下で架橋させるステップと
を含み、
該架橋が装填ベシクルの存在下で行われ、
架橋剤が存在しない場合には該官能部分が架橋剤として作用する、
方法。 - 前記官能化HAが、HA−MAまたはHA−ADHから選択される、請求項16に記載の方法。
- 前記架橋剤がPEGDEから選択される、請求項16または17に記載の方法。
- 前記装填ベシクルを前記官能化HAと混合して混合物を形成し、次いで該混合物に前記架橋剤を加える、請求項16から18のいずれか一項に記載の方法。
- 前記官能化HAが、凍結乾燥されたHA−MAである、請求項19に記載の方法。
- 効果的に官能化されたHAと前記架橋剤が、1:1〜1:20の比で存在する、請求項16から20のいずれか一項に記載の方法。
- 前記架橋が、20℃〜25℃で行われる、請求項16から21のいずれか一項に記載の方法。
- 前記架橋が光架橋である、請求項16から22のいずれか一項に記載の方法。
- 前記光架橋がUV光架橋である、請求項23に記載の方法。
- 請求項16から24のいずれか一項に記載の方法によって得ることができる、内部に分散された装填ベシクルを含むHAヒドロゲル。
- 医薬品として使用するための、請求項1〜15および25のいずれか一項に記載の内部に分散された装填ベシクルを含むHAヒドロゲル。
- 請求項1〜15ならびに25および26のいずれか一項に記載のHAヒドロゲルを含む医薬製剤。
- 経口、局所、静脈内、皮下または筋肉内投与のための、請求項27に記載の医薬製剤。
- 前記官能化HAが、5〜80%の範囲の官能化度を有する、請求項16から25のいずれか一項に記載の方法。
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