JP2018529684A - 抗マラリア組成物および方法 - Google Patents
抗マラリア組成物および方法 Download PDFInfo
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- JP2018529684A JP2018529684A JP2018513661A JP2018513661A JP2018529684A JP 2018529684 A JP2018529684 A JP 2018529684A JP 2018513661 A JP2018513661 A JP 2018513661A JP 2018513661 A JP2018513661 A JP 2018513661A JP 2018529684 A JP2018529684 A JP 2018529684A
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Abstract
Description
本出願は、参照によりその全体が本明細書に組み込まれる、2015年9月16日に出願された米国仮出願第62/219,260号に対する優先権を主張する。
本開示の分野
複数の逆荷電した多価電解質層を含む第1の多層フィルムであって、多層フィルム中の多価電解質層のうちの1つが第1の抗原性多価電解質を含む、第1の多層フィルム
を含み、
第1の抗原性多価電解質は、配列番号5の改変されたPlasmodium falciparumスポロゾイト周囲T*エピトープを含み、
多層フィルム中の多価電解質は、1分子あたり1,000より大きい分子量および少なくとも5つの電荷を有するポリカチオン材料またはポリアニオン材料を含む。
本明細書では、Plasmodium属の原生生物に由来する改変ポリペプチドエピトープを含む多層フィルムであって、宿主に投与されると、宿主において免疫応答を誘発することができる多層フィルムが開示される。詳細には、多層フィルムは、改変T*エピトープまたは改変T1BT*エピトープを含む1つまたは複数のPlasmodium falciparumスポロゾイト周囲タンパク質抗原を含む。
T1:DPNANPNVDPNANPNV(配列番号1)
B:NANPNANPNANP(配列番号2)
T*:EYLNKIQNSLSTEWSPCSVT(配列番号3)
T1BT*:DPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPCSVT(配列番号4)
である。
EYLNKIQNSLSTEWSPSSVT(配列番号5)、または
EYLNKIQNSLSTEWSPASVT(配列番号6)
である。
DPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPSSVT(配列番号7)、または
DPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPASVT(配列番号8)
である。
マウスおよび免疫化:6〜8週齢の雌のC57BL/6JをJackson Laboratoriesから入手し、New HavenのNorthEast Life Sciencesに収容した。マウスを、使用前に少なくとも1週間、環境に順応させた。マイクロ粒子をPBS中に再懸濁させて所望のDP濃度にし(例えば、注射1回あたり10μg/100μl)、シリンジにローディングし免疫化する直前に10分間超音波処理した。マウスは、0、21および42日目に、後足の足蹠に、懸濁液を用いて免疫化した。陽性対照のマウスは、0日目に完全フロインドアジュバント(CFA)中のDPを、21日目、42日目に不完全フロインドアジュバント(IFA)中のDPを皮下(s.c.)注射することによって免疫化し、陰性対照のマウスは、PBSを用いて疑似免疫化した。
設計されたポリペプチドは、P. falciparum CSのT1BT*多価ペプチドに基づいた。表面吸着領域K20(配列番号9)またはK20Y(配列番号16)をC末端に付加し、LbL粒子に組み込むための設計されたポリペプチド(DP)を得た(図1)。Pam3CysをDPにコンジュゲートする場合、リンカー配列SKKKKも付加した。標準の固相ペプチド化学手順を使用してペプチドを合成し、C末端アミドとして調製した。簡単にいうと、フルオレニルメチルオキシカルボニル(Fmoc)アミノ酸を、CEM Libertyマイクロ波ペプチド合成機で、製造業者の合成プロトコールを使用し、カップリング温度に軽微な修正を加えて、Rink MBHAアミド樹脂に二重カップリングさせた。ペプチド合成後、Pam3Cys-OHの手動によるカップリングか、またはFmoc-Pam2Cys-OHの自動カップリングのいずれかによって、Pam3Cys基を樹脂に付加し、続いて、Fmocを除去し、最後にパルミチン酸を用いてキャッピング工程を行った。トリフルオロ酢酸(TFA)/トリイソプロピルシラン/フェノール/水のカクテルで処理して、ペプチドを樹脂から切断し、エーテルで沈殿させた。水(0.1%のTFA)/アセトニトリル勾配を使用するC18 HPLCによって、または水(0.1%のTFA)/イソプロパノール勾配を使用するPam3CysペプチドのためのC4 HPLCによって、粗製のペプチドを精製した。精製したペプチドを、280nmのUV吸光度によって、またはアミノ酸分析によって定量し、アリコートし、凍結乾燥し、-20℃で保存した。配列番号13に対する典型的なC4分析HPLCクロマトグラムを図12に示し、エレクトロスプレー質量スペクトルを図13に示す。配列番号13の平均MWの計算値は9486.27であり、MWの実測値は9485.6である。
T1BT*-K20:(配列番号10)
DPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPCSVTSGNGKKKKKKKKKKKKKKKKKKKKY
Pam3Cys-T1BT*-K20:(配列番号11)
Pam3CysSKKKKDPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPCSVTSGNGKKKKKKKKKKKKKKKKKKKKY
T1BT*-K20(Cys→Ser):(配列番号12)
DPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPSSVTSGNGKKKKKKKKKKKKKKKKKKKK
Pam3Cys-T1BT*-K20(Cys→Ser):(配列番号13)
Pam3CysSKKKKDPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPSSVTSGNGKKKKKKKKKKKKKKKKKKKK
T1BT*-K20(Cys→Ala):(配列番号:14)
DPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPASVTSGNGKKKKKKKKKKKKKKKKKKKK
Pam3Cys-T1BT*-K20(Cys→Ala):(配列番号:15)
Pam3CysSKKKKDPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPASVTSGNGKKKKKKKKKKKKKKKKKKKK
T1BT*-K20(Cys→Ser):(配列番号:17)
SKKKKDPNANPNVDPNANPNVNANPNANPNANPEYLNKIQNSLSTEWSPSSVTSGNGKKKKKKKKKKKKKKKKKKKK
20cm2、500kD(MWCO)のMicroKros(登録商標)mPESフィルターモジュールを備えた、Spectrum Labs(Rancho Dominiguez、CA)からのKrosFlo(登録商標) Research IIi Tangential Flow Filtration Systemで、LBLを実施した。ポリ-L-グルタミン酸ナトリウム塩(PGA)およびポリ-L-リシン臭化水素塩(PLL)をSigma-Aldrich、USAから入手した(それぞれ、カタログ番号P4636およびP6516)。Volodkinら(D.V. Volodkinら Adv. Funct. Mater. 2012 1)によって報告されたプロセスの修正バージョンを使用して、1.0mg/mLのPGA含む0.33MのCaCl2および0.33MのNa2CO3から、球形のメソポーラスなCaCO3コア(2〜5um)を共沈殿させた。すべての工程を室温で行った。
C57BL/6Jマウスを、0、21および42日目に、示した構築物で免疫化した。49日目に採取した血清を、図2に示すように、T1Bペプチドに対するELISAで試験した。結果を1群あたり10頭のマウスの平均±SDで示す。血清を1:250で試験し、プレートを図3に示すアイソタイプ特異的検出抗体でプローブした。結果を1群あたり10頭のマウスの平均±SDで示す。49日目に脾臓細胞を回収し、図4に示すようにIFNγおよびIL-5 ELISPOTプレート中でT1Bペプチドを用いて再刺激した。データは1群あたり3頭のマウスの平均±SDを示す。nXL=架橋していない、bXL=ベース層架橋した。
マウスを、0、28および42日目に、示した構築物で免疫化した。1236および1237は、T*においてC→Aの置換を有したが、1238および1239は、T*においてC→Sの置換を有した。59日目に血清を回収し、図5に示すように、T1Bペプチドに対するELISAで試験した。結果を1群あたり10頭のマウスの平均±SDで示す。59日目に脾臓細胞を回収し、図6に示すようにIFNγおよびIL-5 ELISPOTプレート中でT1Bペプチドを用いて再刺激した。データは1群あたり3頭のマウスの平均±SDを示す。63日目にマウスをPfPbでチャレンジし、図7に示すように40時間後に屠殺した。肝臓に寄生した寄生虫をqPCRによって測定した。結果を1群あたり10頭のマウスの平均±SDで示す。挿入記載は、保護されたマウス(PBS対照と比較して、18S遺伝子発現が90%超の低減)の数を示す。
設計されたシステイン含有T1BT*ペプチド配列番号10を実施例1に記載したように合成し、C18 HPLCによって判断して95%を超える純度まで精製した(図8A)。サンプルを水または緩衝液に溶解し、以下の条件下で保存した:およそpH5の溶液中、室温で16日間(図8B)、pH7.4の溶液中、室温で2.7日間(8C)、pH7.4の溶液中、室温で16日間(8D)、凍結溶液として-20℃から-10℃で4年間保存(8E)。Waters X-bridge C18カラムおよび100%の水/(0.075%のトリフルオロ酢酸(TFA))から50%の水/アセトニトリル(0.075%のTFA)の勾配を使用して20分かけて、これらのサンプルについて分析HPLCを実施した。クロマトグラムによって、元のモノマーペプチドの保持時間が12.6分であり、新たなピークは13.3分に出現することが示されたが、これはジスルフィド二量体と推定される。
水中の設計されたT1BT*ペプチド配列番号10の1.0mg/mLの溶液を調製し、pHが約pH5であることをpH紙により推定した。溶液を室温で16日間置いておき、その後、やや長い保持時間を有する第2のピークがC18クロマトグラムに表われ、ジスルフィド二量体であると推定された(図9A)。1MのTris緩衝液を添加することによってpHを7.4に調整し、サンプルを、1mg/mLのジチオトレイトール(DTT)の新たに調製した溶液と1:1で混合した。5分後、HPLCへの2回目の注入により、より遅い溶出ピークはほとんど消失したことが示され、これはモノマーペプチドへと還元し直したことと合致した。
水中の設計されたT1BT*ペプチド配列番号10の1.0mg/mLの溶液を調製し、1MのTris緩衝液を添加することによってpHを7.4に調整した。溶液を、室温で、C18 HPLCクロマトグラムによって判断してほとんどのペプチドが二量体に変換された時間である5日間置いておいた(図10B)。次いで、サンプルを、1mg/mLのDTTの新たに調製した溶液と1:1で混合、5分後に、サンプルをHPLCに注入した。クロマトグラムにより、モノマーペプチドへのほとんど完全な変換が示された(図10C)。
水中の設計されたT1BT*ペプチド配列番号17の1.0mg/mLの溶液を調製し、1MのTris緩衝液を添加することによってpHを7.4に調整した。溶液を室温で5日間置いておき、HPLCによってモニタリングした。クロマトグラムにより、小さなサテライトピークが出現したが(図11B)、実施例7のシステイン含有ペプチドと対照的に、設計されたペプチドのほとんどはインタクトなままであることが示されている。
Claims (19)
- 配列番号5の配列を含む単離されたペプチド。
- 配列番号1、配列番号2、またはその両方の配列をさらに含む、請求項1に記載の単離されたペプチド。
- 1分子あたり1,000より大きい分子量および少なくとも5つの電荷を有するポリカチオン材料またはポリアニオン材料に共有結合により連結している、請求項1に記載の単離されたペプチド。
- ポリペプチドのC末端および/またはN末端において1つまたは2つの表面吸着領域に共有結合により連結しており、前記表面吸着領域のうちの少なくとも1つは、5つ以上の負または正に荷電したアミノ酸残基を含む、請求項1に記載の単離されたペプチド。
- 配列番号12または配列番号13を含む、請求項1に記載の単離されたペプチド。
- 複数の逆荷電した多価電解質層を含む第1の多層フィルムであって、多層フィルム中の前記多価電解質層のうちの1つが第1の抗原性多価電解質を含む、第1の多層フィルム
を含む組成物であって、
前記第1の抗原性多価電解質が、配列番号5の改変されたPlasmodium falciparumスポロゾイト周囲T*エピトープを含み、
多層フィルム中の前記多価電解質は、1分子あたり1,000より大きい分子量および少なくとも5つの電荷を有するポリカチオン材料またはポリアニオン材料を含む、
組成物。 - 前記第1の多層フィルムが、コアナノ粒子またはコアマイクロ粒子上に堆積されているか、または前記コアナノ粒子またはコアマイクロ粒子を溶解することによって調製されるナノカプセルまたはマイクロカプセルの形態である、請求項6に記載の組成物。
- 前記配列番号5の改変されたPlasmodium falciparumスポロゾイト周囲T*エピトープが、1分子あたり1,000より大きい分子量および少なくとも5つの電荷を有するポリカチオン材料またはポリアニオン材料に共有結合により連結している、請求項6に記載の組成物。
- 前記配列番号5の改変されたPlasmodium falciparumスポロゾイト周囲T*エピトープが、ポリペプチドのC末端および/またはN末端において1つまたは2つの表面吸着領域に共有結合により連結しており、前記表面吸着領域のうちの少なくとも1つは、5つ以上の負または正に荷電したアミノ酸残基を含む、請求項6に記載の組成物。
- 前記多層フィルムが、トール様受容体リガンドをさらに含む、請求項6に記載の組成物。
- 前記トール様受容体リガンドが、前記第1の抗原性多価電解質に共有結合により連結している、請求項10に記載の組成物。
- 前記第1の抗原性多価電解質が、配列番号7の改変されたPlasmodium falciparumスポロゾイト周囲T1BT*エピトープを含む、請求項6に記載の組成物。
- 前記配列番号7の改変されたPlasmodium falciparumスポロゾイト周囲T1BT*エピトープが、1分子あたり1,000より大きい分子量および少なくとも5つの電荷を有するポリカチオン材料またはポリアニオン材料に共有結合により連結している、請求項12に記載の組成物。
- 前記配列番号7の改変されたPlasmodium falciparumスポロゾイト周囲T1BT*エピトープが、ポリペプチドのC末端および/またはN末端において1つまたは2つの表面吸着領域に共有結合により連結しており、前記表面吸着領域のうちの少なくとも1つは、5つ以上の負または正に荷電したアミノ酸残基を含む、請求項12に記載の組成物。
- 前記第1の抗原性多価電解質が、配列番号12または配列番号13である、請求項12に記載の組成物。
- 宿主生物への前記組成物の投与が、エピトープ特異的T細胞応答を生じ、前記T細胞応答は、INFγ T細胞応答、IL-5 T細胞応答、またはその両方である、請求項6に記載の組成物。
- 前記第1の抗原性多価電解質を含有する層以外の、多層フィルムの少なくとも2つの多価電解質層が共有結合により架橋されている、請求項6に記載の組成物。
- 前記共有結合による架橋が、アミノ酸側鎖官能基が関わるアミド結合である、請求項17に記載の組成物。
- 脊椎動物における免疫応答を誘発する方法であって、脊椎動物に、請求項6に記載の組成物を投与することを含む方法。
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MX2018003103A (es) | 2018-06-11 |
AU2016322544B2 (en) | 2022-08-25 |
IL257895A (en) | 2018-05-31 |
JP6934862B2 (ja) | 2021-09-15 |
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IL257895B2 (en) | 2024-03-01 |
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IL257895B1 (en) | 2023-11-01 |
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CN108025052A (zh) | 2018-05-11 |
US10588954B2 (en) | 2020-03-17 |
US9968665B2 (en) | 2018-05-15 |
CA2998540A1 (en) | 2017-03-23 |
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