JP2023075290A - 生物活性複合体の調製 - Google Patents
生物活性複合体の調製 Download PDFInfo
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- JP2023075290A JP2023075290A JP2023040807A JP2023040807A JP2023075290A JP 2023075290 A JP2023075290 A JP 2023075290A JP 2023040807 A JP2023040807 A JP 2023040807A JP 2023040807 A JP2023040807 A JP 2023040807A JP 2023075290 A JP2023075290 A JP 2023075290A
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Abstract
Description
他の生物活性複合体を生成するのに用いられており、その複合体は、αラクトアルブミンの組換え型、特にWO2010/079362号に記載されているようにシステイン残基が無い組換え型から形成された。
の配列と比較して、配列内の1つ以上のアミノ酸が他のアミノ酸と置換されて異なるタンパク質又はポリペプチドを意味する。アミノ酸置換は、「保存的に」アミノ酸が広く同様の特性を有する異なるアミノ酸に変えられることとされている。非保存的置換は、アミノ酸が異なる型のアミノ酸に置換されることである。
は100%の天然タンパク質を有する。
KQFTKXELSQLLKDIDGYGGIALPELIXTMFHTSGYDTQA(配列番号1)
LDDDITDDIMXAKKILDIKGIDYWLAHKALXTEKLEQWLXEKL(配列番号2)
Xはシステイン以外のアミノ酸残基である。
KQFTKAELSQLLKDIDGYGGIALPELIATMFHTSGYDTQA(配列番号3)
LDDDITDDIMAAKKILDIKGIDYWLAHKALATEKLEQWLAEKL(配列番号4)
KQFTKXELSQLLKDIDGYGGIALPELIXTMFHTSGYDTQ(配列番号6)
KQFTKAELSQLLKDIDGYGGIALPELIATMFHTSGYDTQ(配列番号7)
MAGWDIFGWF RDVLASLGLW NKH(配列番号5)
生物学的に許容可能な複合体の生成
所定範囲の生物活性複合体を配列番号7のペプチドを用いて調製した。
Ac-KQFTKAELSQLLKDIDGYGGIALPELIATMFHTSGYDTQ-OH(配列番号7)
これは、ヒトαラクトアルブミンの断片の変異体である。
1)リン酸緩衝生理食塩水(NaCl6.8g/L)、Na2HPO4×2H2O(4.
8g/L)及びKH2PO4(1.3g/L)(pH7.2)
2)NaCl溶液(116mM)(pH7.01)
3)Na2HPO4溶液(31mM)(pH8.6)
4)KH2PO4溶液(9.56mM)(pH4.6)
5)(2)及び(4)の混合液(pH4.63)
6)(2)及び(3)の混合液(pH8.37)
7)(3)及び(4)の混合液(pH7.29)
各混合液は溶液が透明になるまでボルテックスされる。
細胞死アッセイ
ヒト肺癌細胞(A549、ATCC)を、37℃、5%CO2で、非必須アミノ酸(1
:100)、1mMのピルビン酸ナトリウム、50μg/mlのゲンタマイシン及び5~10%のウシ胎児血清(FCS)を含むRPMI-1640で培養した。細胞死試験のために、細胞を96ウェルプレート(2×104/ウェル、Tecan Group Ltd)で一晩中培養した。細胞を、37℃で、7、21又は35μMのペプチドに相当する用量の実施例1で得られた生物活性複合体を含む無血清RPMI-1640中でインキュベートした。FCSを1時間後に加えた。細胞死を、1)ATPライトキット(Parkin Elmer)に基づく発光を用いた細胞のATPレベルの評価、2)プレストブルー蛍光染色(Invitrogen、A13262)及び3)トリパンブルー排除アッセイを含む3つの生物学的方法により、ペプチド-オレイン酸塩処理から3時間後に定量した。蛍光及び発光をマイクロプレートリーダ(InfiniteF200、Tecan)を用いて測定した。
方法における濾過の効果
実施例1の方法を、PBS溶液(1)を用いて2度繰り返したが、ここでは、各溶液を、ポリエーテルスルホン膜(12846445、VWR)及びMinisart(登録商標) NML Cellulose酢酸塩膜(60810103、Sartorius)のいずれかの化学的に異なるフィルタに通した。生成物の生物学的効果を、濾過しなかった生成物と並べて比較して実施例2で説明したように試験した。結果を図2に示す。
BAMLETの生成
凍結乾燥状態のウシαラクトアルブミン(700μM)を、オレイン酸ナトリウム剥片と共にチューブ(3.5mM)に加えた。その後、リン酸緩衝生理食塩水(1ml)をチューブに加え、室温で1~2分間ボルテックスした。透明の溶液が生成された(図3A)。
Claims (26)
- 配列番号6のペプチドとオレイン酸又はその塩とを含む生物活性複合体。
- 前記ペプチドは配列番号7に記載のペプチドである、請求項1に記載の生物活性複合体。
- 配列番号6のペプチド。
- 配列番号7のペプチドである、請求項3に記載のペプチド。
- 生物活性複合体を調製する方法であって、
粉末形態のポリペプチド要素と固体のオレイン酸又はその医薬的に許容可能な塩との混合物を少なくとも2つの塩を含む水性溶媒に溶解することを含み、
第1の塩は塩化ナトリウム又は塩化カリウムであり、第2の塩はリン酸二ナトリウム又はリン酸一カリウムであり、
前記溶解は、50℃以下の適温で行われる、方法。 - 前記水性溶媒は、リン酸一ナトリウム又はリン酸一カリウムである第3の塩をさらに含む、請求項5に記載の方法。
- 前記適温は、10℃~40℃である、請求項5又は6に記載の方法。
- 外気温で行われる、請求項7に記載の方法。
- 前記溶解により得られた溶液を濾過することをさらに含む、請求項5~8のいずれか1項に記載の方法。
- 溶媒を除去し、固体の前記複合体を得ることをさらに含む、請求項5~9のいずれか1項に記載の方法。
- 前記溶媒は凍結乾燥により除去される、請求項10に記載の方法。
- 前記ポリペプチド要素は、膜を摂動する活性を有するαラクトアルブミン、リゾチーム若しくは他のタンパク質から選択される天然タンパク質、又はそれらの分子内結合が欠損したそれらの変異体若しくは断片である、請求項5に記載の方法。
- 前記ポリペプチド要素は、50アミノ酸以下のペプチド断片である、請求項12に記載の方法。
- 前記ペプチド断片は、請求項12で定義された天然タンパク質又はそれらの変異体のαヘリックスドメインを含む、請求項13に記載の方法。
- 前記ペプチドは、配列番号1、2、5又は6のペプチドである、請求項14に記載の方法。
- 前記ペプチドは、配列番号7のペプチドである、請求項15に記載の方法。
- 前記ポリペプチドは、αラクトアルブミンである、請求項12に記載の方法。
- 前記ポリペプチドは、ウシαラクトアルブミンである、請求項17に記載の方法。
- 前記第1の塩は、塩化ナトリウムである、請求項5~18のいずれか1項に記載の方法。
- 前記第2の塩は、リン酸二ナトリウムである、請求項5~19のいずれか1項に記載の方法。
- 前記第3の塩は、リン酸一カリウムである、請求項6に記載の方法。
- 前記複合体は、使用直前に無菌水を用いて再構成される請求項10又は11に記載の方法。
- 請求項5~22のいずれか1項に記載の方法により得られる生物活性複合体。
- 請求項23に記載の生物活性複合体を含む医薬組成物。
- 請求項23に記載の生物活性複合体を含む機能性食品組成物。
- 請求項23に記載の生物活性複合体又は請求項24若しくは25に記載の組成物の有効量を、それらを必要とする患者に投与することを含む、癌又はウイルス感染を治療又は予防する方法。
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US20210130394A1 (en) | 2021-05-06 |
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WO2018210759A1 (en) | 2018-11-22 |
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ES2973290T3 (es) | 2024-06-19 |
PL3811967T3 (pl) | 2024-03-18 |
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