JP6099095B2 - 組換えヒトインターフェロン様タンパク質 - Google Patents
組換えヒトインターフェロン様タンパク質 Download PDFInfo
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- JP6099095B2 JP6099095B2 JP2013173596A JP2013173596A JP6099095B2 JP 6099095 B2 JP6099095 B2 JP 6099095B2 JP 2013173596 A JP2013173596 A JP 2013173596A JP 2013173596 A JP2013173596 A JP 2013173596A JP 6099095 B2 JP6099095 B2 JP 6099095B2
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Description
1957年に、Isaacs及びLindenmann(2)により見出されたヒトインターフェロン(HuIFN)は、ウイルス感染やマイトジェン暴露のような様々な刺激に対する暴露の結果、様々な真核細胞により分泌される周知のサイトカインファミリーである。IFNは、細胞の増殖及び分化、及び免疫系の調節を含む細胞挙動から多くの変化を引き起こすことができる(3〜7)。HuIFNは、6つの下位グループ、すなわち、IFN−α、IFN−β、IFN−γ、IFN−ω、IFN−ε及びIFN−κに分類されている。HuIFN−α(白血球由来のインターフェロン)はヒト白血球細胞内で、及び少量のHuIFN−β(線維芽細胞由来のインターフェロン)と共にリンパ芽球様細胞内で生成される。HuIFNは、化学的及び生物学的特性により、2つの一般的なカテゴリー、すなわち、I型及びII型に分類される。I型は、IFN−α及びIFN−βの下位グループのみならず、最近発見されたIFN−ω、IFN−ε及びIFN−κの下位グループで構成される。II型は、一つのメンバー:IFN−γ(免疫インターフェロン)のみを有する。
本発明を詳細に記載する前に、本発明は、記述された特定のタンパク質分子、方法論、プロトコール、細胞株、ベクター、及び試薬に限定されるものではなく、変更され得ることが理解されなければならない。また、本明細書において用いられた用語は、特定の実施例のみを記述することを目的とし、添付の請求項によってのみ制限されるべき本発明の範囲を制限するように意図されたものではないことが理解されなければならない。
「オープンリーディングフレーム」又はORFという用語は、いずれの終止コドン無しにアミノ酸に対する一連のヌクレオチドトリプレット暗号を意味し、通常、タンパク質に翻訳可能な配列を意味する。
本明細書で用いられる「生物学的に活性」及び「生物学的活性」という用語は、例えば、自然発生又は非自然発生分子と類似又は同一の、生物系内での構造的、調節的、生化学的、又はその他の生物学的機能を意味する。
本明細書で用いる「抗ウイルス性」及び「抗ウイルス」という用語は、インビトロ及び/又はインビボで細胞のウイルス感染を緩和及び/又は予防し、又は細胞内でのウイルス複製を妨害することにより、ウイルス増殖を緩和又は停止し、又はウイルス粒子の総数を減少させることを意味する。本明細書で用いる「抗ウイルス活性」とは、インビトロ及び/又はインビボでウイルス感染を阻害し、又はウイルス複製を妨害するタンパク質、タンパク質構築物、又は組成物を意味する。
本発明は、本明細書で「ノバフェロン」(登録商標)と称する新規なヒトインターフェロン様タンパク質の調製及び特性決定に関する。以下に詳述するように、ノバフェロンタンパク質においては、標準インビトロ試験で測定されるように、自然発生HuIFN−α2bと比較して高められた抗ウイルス及び抗増殖生物学的活性が示される。特に、Wish−VSVシステムで試験した場合、同じ試験システムにおけるHuIFN−α2bと比較して、ノバフェロンタンパク質は抗ウイルス活性では12.5倍の増加を示し、Daudi細胞増殖の抗増殖阻害では約400倍の向上を示す。
本発明の新規なポリヌクレオチド配列/核酸分子は、図1(配列番号1)に示されるように498個のヌクレオチドからなる。ヌクレオチド配列のような本明細書で提供する情報を利用し、ノバフェロンタンパク質(配列番号2)をエンコードする本発明の核酸分子を組換え発現、化学合成、又はDNA突然変異生成などのその他の標準分子生物学工程を用いて得ることができる。
本発明は、配列番号2のノバフェロンタンパク質、及び配列番号2に対して少なくとも約85〜95%又はそれ以上のアミノ酸配列同一性を有する非自然発生タンパク質のように、配列番号2のノバフェロンタンパク質と実質的に類似のタンパク質又はポリペプチド変異体を含む。例えば、配列番号2に示されるアミノ酸配列に対して少なくとも約85%、90%、95%、96%、97%、98%、又は99%の配列同一性を有する非自然発生タンパク質は、本発明の範囲内である。さらに、本発明のノバフェロンタンパク質は、その機能及び特性を高める目的で、他のタンパク質又はタンパク質断片又は他の分子と融合させることにより、構造的に修飾され得る。例示は、ノバフェロンタンパク質の発現を増加させ、又はノバフェロンタンパク質をさらに安定化させるために、ノバフェロンタンパク質を他のタンパク質/タンパク質断片と融合させることを含むが、これらに限定されない。
本発明はまた、本発明の分離されたDNA分子からなる組換えベクター、組換えベクターで遺伝的に設計/トランスフェクションされた宿主細胞、及び組換え技術によるノバフェロンタンパク質又はその断片の生産方法に関する。ベクターは、例えば、プラスミド、ファージ、ウイルス、又はレトロウイルスベクターであってもよい。レトロウイルスベクターは、複製可能又は複製不能であってもよい。後者の場合、ウイルス増殖は、一般に相補的な宿主細胞内でのみ発生する。ノバフェロンの生産を詳述する例を以下に説明する。
標的組換えタンパク質の発現のための適切な宿主細胞型は、通常、標的タンパク質の特性及びその他の条件、例えば製造費用、大規模製造の容易性、産業的生産の規模等の検討に基づいて選択される。その後、最高収率で標的タンパク質を発現するトランスフェクションされた細胞のクローンを選択し、最適発現率を有する最終クローンを標的タンパク質発現細胞株と命名し、標的タンパク質の製造に用いる。標的タンパク質を発現する細胞株を、様々な栄養素を含有する培地内で増殖させる。細胞の最適増殖及び/又は標的タンパク質の最適発現のために、様々な試薬及び条件が用いられ、トランスフェクションされたベクター内の標的タンパク質のcDNA配列と共に取り込まれた選択的プロモーターを誘導する。宿主細胞型/発現系がバクテリアである場合、培養細胞は、一般に遠心分離により培地から回収される。回収された細胞体は物理的又は化学的手段で分解され、合成された標的タンパク質を含有する回収された粗抽出物は、タンパク質のさらなる精製のために保持される。微生物細胞の破壊に適用される方法は、凍結融解サイクル、超音波処理、機械的破砕、又は細胞溶解剤の使用を含むが、これらに限定されない。このような方法は、当業者に良く知られている。
(活性アッセイ及び医学的用途)
上述したように、ノバフェロンタンパク質は、インターフェロンファミリーの多くの構成員、特に、HuIFN−α14のmRNA(図2)により翻訳されるインターフェロンタンパク質に対して配列相同性を示す。HuIFN−αは、抗ウイルス、抗増殖、及び免疫調節活性を含む広範囲の生物学的活性を有することが示された(10)。
(1)ノバフェロンのインビボ抗増殖効果は、天然HuIFN−α2bと比較して顕著に高められ又はさらに強力であった。
(実施例)
下記の実施例は、上記の発明の使用態様をより十分に説明し、また本発明の様々な態様を実施するための最良の形態を記載するために提示されている。これらの実施例は本発明の実際の範囲を全く限定せず、むしろ例示の目的で提示されるものとして理解される。ここで引用される全ての参考文献は、その全体が参照として包含される。
(実施例1)
実施例1.ヒト白血球cDNAからのヒトIFN−α遺伝子のPCR増幅
ヒト末梢血白血球から総mRNAを抽出した。アドバンテージ(Advantage)(商標)RT−for−PCRキット(Clontech社、米国、カリフォルニア州、マウンテンビュー)及びcDNA合成プライマー(オリゴdT18)を用い、メーカーの推奨に従ってcDNAの調製を行った。
IFNaO3−1:5’−AATCATTTCCATGTTG(A/G)ACCAG−3’(配列番号4);
IFNaO3−2:5’−AATCATTTCCCGGTTGTACCAG−3’(配列番号5);
IFNaO3−3:5’−AATCATTTCCATGTTGAAACAG−3’(配列番号6);
IFNaO3−4:5’−AATCATTTCAAGATGAGCCCAG−3’(配列番号7);
IFNaO3−5:5’−AATGATTTTCATGTTGAACCAG−3’(配列番号8);
IFNaO3−6:5’−AATCATTT(C/G)(C/G)ATGTTGAACCAG−3’(配列番号9);
IFNaO3−7:5’−GATCATTTCCATGTTGAATGAG−3’(配列番号10);
IFNaO3−8:5’−GAGTCGTTTCTGTGTTGGATCAG−3’(配列番号11)。
(実施例2)
実施例2.I型HuIFN−含有プラスミドのシャッフリングライブラリーの構築
I型ヒトIFN−αの一つのコード配列を含有するプラスミドを構築するために、成熟ヒトI型IFNタンパク質の領域をコードする個々のcDNAに基づき、BamHI及びEcoRI制限部位を有する15対のオリゴヌクレオチドを合成した(Genentech社、米国、カリフォルニア州、南サンフランシスコ)。これらのタンパク質のジーンバンクヌクレオチド登録番号をここに参照すると、NM_024013(IFN−α1)、NM_000605(IFN−α2)、NM_010504(IFN−α4)、NM_010505(IFN−α5)、NM_008335(IFN−α6)、NM_008334(IFN−α7)、NM_008336(IFN−α8)、NM_002171(IFN−α10)、NM_002172(IFN−α14)、NM_002173(IFN−α16)、NM_021268(IFN−α17)、NM_002175(IFN−α21)である。実施例1でテンプレートとして構築したプライマー及びプラスミドを、標準的PCR(111)で使用した。その結果得られた生成物を制限エンドヌクレアーゼ(RE)BamHI及びEcoRIで切断し、多重クローニング領域にBamHI部位及びEcoRI部位を有するpBV220(86)の派生体発現プラスミドである大腸菌の発現ベクターpBVBにクローニングした。これらの最終構築物を、全てDNAシーケンス解析(PE Applied Biosystems社、米国)で確認した。
(実施例3)
実施例3.シャッフリングライブラリーのスクリーニング
新規に形質転換させた大腸菌DH5α細胞を37℃で一晩、LBプレートで増殖させた。単一コロニーを個別に採取し、96ウェルプレート中50μg/mlのアンピシリンを含有する100μlのLB培地に播種した。コロニーを30℃、250rpmで振とうした。一晩培養した後、96ウェルプレート中50μg/mlのアンピシリンを含有する100μlのLB培地に、10μlのバクテリア培養物をデュプリケートで播種した。元のプレート(いわゆるストックプレート)はしばらく4度で保存した。デュプリケートのプレート中の細胞を、OD600が0.4になるまで30℃で増殖させ、その後42℃で誘導した。4時間の熱誘導の後、凍結融解サイクルを開始するためバクテリア培養物を−80℃の冷凍室へ直接入れた。2サイクルの凍結融解の後、バクテリア懸濁液/溶解物を所望の濃度に希釈し、抗増殖試験のためのDaudi細胞培養(101)又は抗ウイルス試験のためのWish細胞培養(113)にさらした。
(実施例4)
実施例4.大腸菌における組換えタンパク質の発現及び精製
ノバフェロンタンパク質(配列番号2)は大腸菌で発現された。開始コドンATGを人工的に付加した配列番号1のリーディングフレームを、λPRPLプロモーター(114)の制御の下、温度誘導性pBVBベクターにクローニングした。ノバフェロンの発現プラスミド、pBVBNFをDH5α細胞に形質転換させた。単一コロニーを個別に採取し、50μg/mlのアンピシリンを含有する2mlのLB培地に播種し、30℃で8時間培養した。その後、培養バクテリアの2mlを、50μg/mlのアンピシリンを含む50mlの培地で、撹拌しながらさらに30℃で一晩培養した。翌朝、一晩培養したバクテリアを50μg/mlのアンピシリンを含む大量のLB培地に1:10〜1:20の比率で播種し、撹拌しながら30℃で培養した。培養物が増殖の対数期中期(A550=0.5〜0.6)に達した時、培養温度を急激に42℃まで上昇させ、ノバフェロンの発現を誘導するために4時間保持した。4時間の熱誘導の後、バクテリア細胞を遠心分離し、PBS(137mM NaCl、2.7mM KCl、10mM Na2HPO4、2mM
KH2PO4)で3回洗浄した後、増殖段階を行うまで−80℃で保存した。
(実施例5)
実施例5.大腸菌における組換えHuIFN−α2bの発現及び精製
HuIFN−α2bの発現プラスミドpBV2bは、熱誘導性λPRPLプロモーターの制御下にあるHuIFN−α2b(ジーンバンクヌクレオチド登録番号NM_000605)の成熟タンパク質のcDNAコード領域を含む。HuIFN−α2bの発現は、Joseph SとDavid WRによるプロトコル(116)に従って行われた。
(実施例6)
実施例6.ノバフェロンの抗ウイルス活性の測定
Armstrong JAによる古典的プロトコル(113)に記載されているようなWISH−VSVシステムを用いて抗ウイルス活性を測定した。1日目、WISH細胞(ATCC、カタログ番号CCL25)を14,000細胞/ウェルの濃度で96ウェルプレートに播種し、37℃で培養した。24時間後、2倍ずつ連続希釈したノバフェロン、HuIFN−α2b、WHOヒトIFN国際基準又はブランク培養培地を各ウェルに加え、37℃でさらに24時間培養した。3日目、培地を除去し、1,000PFUの水疱性口内炎ウイルス(VSV、ATCC、カタログ番号VR−1421)を含む培地と交換した。細胞を再び37℃で24時間培養し、その後0.85%NaClで洗浄して死細胞を除去した。次に、培養プレートをダイ・フィクサー溶液(0.5%クリスタルバイオレット、5%ホルマリン(V/V)、50%エタノール(V/V)、及び0.85%NaCL)に1時間浸漬した。その後ダイ・フィクサー溶液を静かに移し、マイクロプレートを水道水で十分に洗浄し、乾燥させた。染色された細胞を0.2mlの2−メトキシエタノールで溶解した。クリスタルバイオレットバイオアッセイのため、モデルオプシスMR(Thermo Labsystems社、米国)においてプレートを550nmで読み取った。
(実施例7)
実施例7.ノバフェロンの抗増殖活性
抗増殖活性アッセイを、基本的にEvingerとPestka(101)によって述べられているように実施した。
ヒト腫瘍細胞株を様々な組織、すなわち、ATCC(アメリカン・タイプ・カルチャー・コレクション、米国、20108 バージニア州、マナサス、P.O.ボックス1549)、DSMZ(ドイツ国立生物材料資源センター、Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH、ドイツ国、38124 ブラウンシュヴァイク、マシェローダー・ヴェーグ 1b)、JCRB(ジャパニーズ・コレクション・オブ・リサーチ・バイオリソーシズ−セルバンク、独立行政法人医薬基盤研究所、日本国、567−0085 大阪府、茨木市、彩都あさぎ7−6−8)から購入した(下記表1)。
対数増殖期の細胞株を、2×103〜6×104細胞/ml(細胞株によって異なる。表2を参照)の濃度で、加温(36℃)した培地に穏やかに懸濁した。100μlの細胞懸濁液を96ウェルプレートの各ウェルに播種し、37℃で6〜8時間培養した。続いて培養培地で希釈した同量(100μl)のノバフェロン又はHuIFN−α2bをトリプリケートでウェルに添加した。プレートを4〜5秒穏やかに撹拌して内容物を混合し、37℃で6日間培養した。比較可能性を保障するため、ノバフェロン及びHuIFN−α2b試料を同じプレート内で試験した。
懸濁細胞の細胞数を測定するため、直接細胞計測法を用いた。培養6日後、懸濁細胞培養物をトリパンブルーで希釈し(最終濃度0.02%)、血球計測器を用いて細胞数を直接計測した。
実施例8.インビボ腫瘍モデル実験
A.細胞培養及びインビボヒト腫瘍異種移植モデル
結腸癌細胞株(LS180)、黒色腫細胞株(A−375)及び肝臓癌細胞株(Hep
G2)は、アメリカン・タイプ・カルチャー・コレクション(ATCC、メリーランド州、ロックビル)から入手した。前立腺癌細胞株(PC−3)はドイツ国立生物材料資源センター(DSMZ、Deutsche Sammlung von Mikroorganismen and Zellkulturen、ドイツ国)から入手した。リンパ腫細胞株(HL60(s))はジャパニーズ・コレクション・オブ・リサーチ・バイオリソーシズ−セルバンク(JCRB、日本)から購入した。全細胞を指示に従って培養した(表1参照)。簡単に述べると、LS180及びHep G2をMEM培地で培養した。A−375をDMEMで培養した。両培地に10%ウシ胎仔血清(FBS)、2mMグルタミン、100U/mlのペニシリン、100mg/mlのストレプトマイシン、0.1mM非必須アミノ酸、及び1.0mMピルビン酸ナトリウムを添加した。PC−3及びHL60(S)細胞を、10%FBS、100U/mlのペニシリン、及び100mg/mlのストレプトマイシンを添加したRPMI1640で培養した。全細胞を5%CO2雰囲気中に37℃で保持した。
各インビボ腫瘍モデルについて、癌細胞播種から6日目に、癌保有マウス(腫瘍体積は約100mm3)を各群で等しい頭数になるよう無作為に7〜8群に分別し、処理を開始した。
群1(対照):PBS、毎日
群2(低用量のノバフェロン):1.25μg/kg、毎日
群3(中用量のノバフェロン):12.5μg/kg、毎日
群4(高用量のノバフェロン):125μg/kg、毎日
群5(低用量のHuIFN−α2b):1.25μg/kg、毎日
群6(中用量のHuIFN−α2b):12.5μg/kg、毎日
群7(高用量のHuIFN−α2b):125μg/kg、毎日
群8(5−FU):30mg/kg、2日に1回、計5回静脈内投与
処理を開始してから、週に1度キャリパーで腫瘍を測定した。下記式を用いて腫瘍体積を算出した。体積=0.5×(幅)2×(長さ)。処理中止の日(処理開始から30日後)にマウスを屠殺した。固形腫瘍を分離し、写真撮影して測定した。
前立腺癌PC−3異種移植片を、1.25、12.5又は125μg/kgのノバフェロンの30日間の皮下注射で処理した。ノバフェロンはPC−3腫瘍増殖の強力な用量依存的阻害を示した(P<0.05)。図5及び下記表4に示されるように、ノバフェロン処理群におけるPC−3腫瘍増殖は、PBS処理対照群と比較してかなり抑制された。例えば、ノバフェロン処理群(125μg/kg)におけるPC−3異種移植腫瘍塊の平均重量は0.091±0.081gであり、対照動物の1.948±0.567gと比較して極めて有意に減少した(P<0.001)(表4)。言い換えると、125μg/kgの30日間の処理は、PC−3腫瘍増殖の95.3%の阻害を達成した(表4)。
ノバフェロンのインビボ抗腫瘍活性を、さらに肝臓癌Hep G2異種移植モデルについて評価した。ノバフェロンは対照群と比較してHep G2腫瘍増殖の有効な用量依存的阻害を示した(P<0.001)。PBS対照群の2125.8±743.1mm3と比較して、ノバフェロン処理群(毎日1.25、12.5又は125μg/kgで30日間の皮下注射)における平均腫瘍体積は、それぞれ783.2±270.0、459.3±414.3、及び104.6±56.5mm3であった。30日間の125μg/kgのノバフェロン処理はHep G2の最も高い阻害を達成し(96.6%)、HuIFN−α2bの125μg/kgよりも有意に高かった(89.2%、P<0.01)。この用量でのより長期間のノバフェロンの処理は、さらに良好な又は完全な阻害の傾向を示した。観察期間の終了時の平均腫瘍重量は、125μg/kgのノバフェロン処理群では0.074±0.083gであり、125μg/kgのHuIFN−α2b処理群よりも有意に小さかった(0.235±0.199グラム、P<0.001)(下記表5)。
G2腫瘍増殖阻害を引き起こした(96.6%対89.2%、P<0.05)(表5)。
ノバフェロンのインビボ抗腫瘍活性を、さらに悪性黒色腫A−375異種移植モデルにおいて評価した。A−375細胞株(ATCC番号CRL−1619)はヒト悪性固形腫瘍から得られた。ノバフェロンは対照群と比較してA−375腫瘍増殖の有効な用量依存的阻害を示した(P<0.001)。PBS対照群と比較すると、ノバフェロン処理群(毎日1.25、12.5又は125μg/kgで28日間の皮下注射)における阻害率は、それぞれ40.1%、75.0%、及び82.8%であった(P<0.001)(下記表6)。30日間の125μg/kgのノバフェロン処理はA−375の最も高い阻害を達成し(82.8%)、125μg/kgのHuIFN−α2bよりも有意に高かった(69.9%、P<0.001)。
ノバフェロンのインビボ抗腫瘍活性を、結腸癌LS180異種移植モデルにおいて評価した。LS180細胞株(ATCC番号CL−187)はヒト結腸癌から得られた。ノバフェロンは対照群と比較して結腸癌LS180腫瘍増殖の有効な用量依存的阻害を示した(P<0.001)。PBS対照群と比較すると、ノバフェロン処理群(毎日1.25、12.5又は125μg/kgで28日間の皮下注射)における阻害率は、それぞれ75.0%、80.5%、及び92.5%であった(P<0.001、下記表7)。28日間の125μg/kgのノバフェロン処理はLS180腫瘍増殖の最も高い阻害を達成し(92.5%)、125μg/kgのHuIFN−α2bよりも有意に高かった(82.3%、P<0.001)。
ノバフェロンのインビボ抗腫瘍活性を、さらにHL60(s)リンパ性白血病異種移植モデルにおいて評価した。ノバフェロンは対照群と比較してHL60(s)腫瘍増殖の有効な用量依存的阻害を呈した(P<0.001)。PBS対照群と比較すると、ノバフェロン処理群(毎日1.25、12.5又は125μg/kgで28日間の皮下注射)における阻害率は、それぞれ43.8%、55.2%、及び80.4%であった(P<0.001、下記表8)。21日間の125μg/kgのノバフェロン処理はHL60(s)腫瘍増殖の最も高い阻害を達成し(80.4%)、125μg/kgのHuIFN−α2bよりも有意に高かった(69.8%、P<0.05)。
ヒト癌の様々な異種移植片を伴うマウスを、ノバフェロン、HuIFN−α2b又は5−FU処理の期間中注意深く観察した。5−FU処理群とは異なり、全てのノバフェロン又はHuIFN−α2b処理群のマウスは正常に摂食及び行動し、体重の減少はなかった。5−FU処理マウスは摂食及び行動の特徴的変化及び体重の減少を示した。これらの観察結果が示すことは、ノバフェロンが異種移植動物モデルにおいて5−FUと同様の、又はさらに良好な抗癌性を示すと同時に、癌細胞の阻害に対してより特異的であり、かつ正常細胞及び/又は生理的機能に対する影響が遥かに小さい可能性があるということである。これらはヒトへの応用においてより優れた耐性及び治療効果につながるかもしれない。
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Claims (27)
- ヒトインターフェロン様生物学的活性を示す非自然発生タンパク質において、それぞれ配列番号2と90%以上95%未満の配列同一性となるように保存的アミノ酸置換により改変されたアミノ酸配列を含むタンパク質からなる群より選択され、前記タンパク質は、ヒトインターフェロンアルファ2b(HuIFN−α2b)よりも少なくとも10倍高い抗増殖活性を有するタンパク質。
- 前記タンパク質は、HuIFN−α2bと比較して高められた抗ウイルス活性を有する請求項1に記載のタンパク質。
- 前記タンパク質は、HuIFN−α2bよりも少なくとも2倍高い抗ウイルス活性を有する請求項2に記載のタンパク質。
- 前記タンパク質は、HuIFN−α2bよりも少なくとも5倍高い抗ウイルス活性を有する請求項3に記載のタンパク質。
- 前記タンパク質は、HuIFN−α2bよりも少なくとも10倍高い抗ウイルス活性を有する請求項4に記載のタンパク質。
- 前記タンパク質は、HuIFN−α2bよりも少なくとも50倍高い抗増殖活性を有する請求項1に記載のタンパク質。
- 前記タンパク質は、HuIFN−α2bよりも少なくとも100倍高い抗増殖活性を有する請求項6に記載のタンパク質。
- 前記タンパク質は、HuIFN−α2bよりも少なくとも200倍高い抗増殖活性を有する請求項7に記載のタンパク質。
- 前記タンパク質は組換え体である請求項1に記載のタンパク質。
- 前記タンパク質は19315ダルトンの分子量である請求項1に記載のタンパク質。
- 任意でN末端にメチオニン残基を有する請求項1に記載のタンパク質。
- ポリペプチド、非ポリペプチド分子、又はラベル分子に結合された請求項1に記載のタンパク質を含み、前記ヒトインターフェロン様生物学的活性を示すタンパク質構築物。
- 前記タンパク質はグリコシル化される請求項12に記載のタンパク質構築物。
- 前記タンパク質はポリペプチドに結合されている請求項12に記載のタンパク質構築物。
- 前記タンパク質は非ポリペプチド分子に結合されている請求項12に記載のタンパク質構築物。
- 前記非ポリペプチド分子はポリマー分子である請求項15に記載のタンパク質構築物。
- 前記ポリマー分子は、直鎖状又は分岐状のポリエチレングリコールである請求項16に記載のタンパク質構築物。
- 前記タンパク質はラベル分子に結合されている請求項12に記載のタンパク質構築物。
- 請求項1に記載のタンパク質及び製剤学的に許容される担体、希釈剤又は賦形剤からなる組成物。
- 請求項1〜11のいずれか一項に記載のタンパク質をエンコードするポリヌクレオチド。
- 抗ウイルス剤の製造における請求項1に記載のタンパク質の使用方法。
- 抗増殖剤の製造における請求項1に記載のタンパク質の使用方法。
- 抗癌剤の製造における請求項1に記載のタンパク質の使用方法。
- 免疫調節剤の製造における請求項1に記載のタンパク質の使用方法。
- ヒトインターフェロン様生物学的活性を示す非自然発生タンパク質において、配列番号2と90%以上95%未満の配列同一性となるように保存的アミノ酸置換により改変されたアミノ酸配列を含むと共に、HuIFN−α2bと比較して高められた抗ウイルス及び抗増殖活性を有し、前記抗増殖活性がHuIFN−α2bよりも少なくとも10倍高いタンパク質。
- 請求項25に記載のタンパク質をエンコードするポリヌクレオチド。
- 請求項25に記載のタンパク質を含む組成物。
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