JP6735676B2 - C−fosの選択的インヒビターおよびその抗増殖特性 - Google Patents
C−fosの選択的インヒビターおよびその抗増殖特性 Download PDFInfo
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Description
第1の態様において、本発明は、
・Ras/ERK経路における突然変異により引き起こされるかまたは該突然変異が関与している、および/または
・c−Fosの産生の増加に関連している
癌の予防および/または治療における使用のためのc−Fosの選択的インヒビターであって、c−Fosの選択的インヒビターが、
・少なくとも1つの細胞透過性配列と、
・配列番号29(FVFTYPEA)を含むc−Fosのドッキングドメイン配列に対応するアミノ酸配列
とを含むペプチドである、c−Fosの選択的インヒビターに関する。
・少なくとも1つの細胞透過性配列と、
・配列番号29(FVFTYPEA)を含むc−Fosのドッキングドメイン配列に対応するアミノ酸配列
とを含むペプチドである、c−Fosの選択的インヒビターに関する。
・少なくとも1つの細胞透過性配列と、
・配列番号29(FVFTYPEA)を含むc−Fosのドッキングドメイン配列に対応するアミノ酸配列
とを含むペプチドであり、ステントが、心血管疾患に罹患した患者を治療するために使用される、c−Fosの選択的インヒビターに関する。
定義
本明細書中で用いる「ペプチド」なる語は、100個未満のアミノ酸を有するアミノ酸配列を意味する。本明細書中で用いる「ペプチド」なる語は、90個未満のアミノ酸、80個未満のアミノ酸、70個未満のアミノ酸、60個未満のアミノ酸または50個未満のアミノ酸を有するアミノ酸配列を含む。好ましくは、該アミノ酸配列は20、21、22、23、24、25、50、75または100個のアミノ酸を含む。
・少なくとも1つの細胞透過性配列と、
・c−Fosのドッキングドメイン配列に対応するアミノ酸配列
とを含む。
第1の態様において、本発明は、
・Ras/ERK経路における突然変異により引き起こされるかまたは該突然変異が関与している、および/または
・c−Fosの産生の増加に関連している
癌の予防および/または治療における使用のためのc−Fosの選択的インヒビターであって、c−Fosの選択的インヒビターが、
・少なくとも1つの細胞透過性配列と、
・ERKに対するc−FosのDEFドッキングドメインに対応するアミノ酸配列、好ましくは、配列番号29(FVFTYPEA)を含むc−Fosのドッキングドメイン配列に対応するアミノ酸配列
とを含むペプチドである、c−Fosの選択的インヒビターに関する。
・Raf−1(これは遍在的に発現される)、
・A−Raf(軟骨、腸、心臓、脾臓、胸腺、小脳、および尿生殖器組織において見出される)、
・B−Raf(複数のアイソフォームで存在し、ほとんどの組織において発現され、神経組織において高い発現が見られる)。
・少なくとも1つの細胞透過性配列と、
・配列番号29(FVFTYPEA)を含むc−Fosのドッキングドメイン配列に対応するアミノ酸配列
とを含むペプチドである。
・少なくとも1つの細胞透過性配列と、
・配列番号29(FVFTYPEA)を含むc−Fosのドッキングドメイン配列に対応するアミノ酸配列
とを含むペプチドであり、該ステントは、心血管疾患に罹患した患者を治療するために使用される。
・血管平滑筋細胞、線維芽細胞および神経鞘細胞に対する抗増殖特性を有すること、
・毒性を有さないこと、および
・浸潤を抑制すること
が判明した。
・I型神経線維腫症(これにおいては、神経および他の組織を圧迫することにより重大な損傷を引き起こしうる良性でありうる腫瘍(神経線維腫)を神経組織が成長させる)、
・II型神経線維腫症(これにおいては、両側性聴神経腫(神経鞘腫としても公知の内耳神経または第8脳神経(CN VIII)の腫瘍)が発生し、しばしば、聴力損失につながる)、
・神経鞘腫症(これにおいては、痛みを伴う神経鞘腫が脳神経、脊髄神経および末梢神経上に発生する)。
・HIV−TAT配列(配列番号2)、
・ペネトラチン(Penetratin)(配列番号3)、
・7〜11個のアルギニンのアミノ酸配列(配列番号4〜8)、
・X7/11R配列(ここで、該配列は、配列番号9〜12のような配列内にランダムに位置する7〜11個のアルギニンを含む7〜25アミノ酸配列、好ましくは7〜20アミノ酸配列である)、および
・配列番号13〜17のような、De Coupadeら,Biochem J(2005)390,407−418およびWO01/64738に記載されている細胞透過性配列としてのVectocell(登録商標)に由来する配列
を含む群から選択される。
・結腸癌、膵臓癌、黒色腫、卵巣癌、肺癌、甲状腺癌、白血病、若年性骨髄単球性白血病、神経膠腫、神経線維腫、頸部肝細胞癌、乳癌、骨肉腫および子宮内膜癌からなる群から選択される癌、および/または
・神経線維腫症、好ましくは神経線維腫症I(NF1)
を予防および/または治療するための使用のための、c−Fosの選択的インヒビターの少なくとも1つを含む医薬組成物である。
a)前記のc−Fosの選択的インヒビターの少なくとも1つ、
b)前記のペプチドをコードする核酸、または
c)前記の核酸を含む発現ベクター
を含む。
・結腸癌、膵臓癌、黒色腫、卵巣癌、肺癌、甲状腺癌、白血病、若年性骨髄単球性白血病、神経膠腫、神経線維腫、頸部肝細胞癌、乳癌、骨肉腫および子宮内膜癌からなる群から選択される癌、ならびに/または
・神経線維腫症
の予防および/または治療方法に関するものであり、該方法は、c−Fosの選択的インヒビターの少なくとも1つの治療的有効量を投与することを含み、該ペプチドは、少なくとも1つの細胞透過性配列と、配列番号29(FVFTYPEA)を含むc−Fosのドッキングドメイン配列に対応するアミノ酸配列とを含む。
方法
細胞系
0.05mg/ml アスコルビン酸、0.01mg/ml インスリン、0.01mg/ml トランスフェリン、10ng/ml 亜セレン酸ナトリウム、10%(v/v)熱不活性化FBS(ウシ胎児血清)、100U/ml ペニシリンおよび100μg/ml ストレプトマイシン、10mM HEPESで補足されたDMEM F12K培地内で初代血管平滑筋細胞(vSMC)(ATCC CRL−1999)を増殖させた。
本発明者らにより使用された化合物は以下のとおりである。
ウェル当たり10 000個の細胞を完全培地の存在下で増殖させた。1周期の細胞分裂(HCAECおよびvSMCに関しては約32時間、NIH3T3に関しては24時間)の後、該細胞を更に1周期にわたって飢餓させた(0.1% 血清または栄養サプリメント(HCAECの場合))。ついでそれらを「ペプシグナル」(3、6または12μM)、MEKインヒビターU0126(10μM)または細胞増殖の古典的インヒビターであるパクリタキセル(10nM)、VIVIT(100μM)のそれぞれの存在下または非存在下、完全培地内で24〜72時間増殖させた。分裂中の細胞の可視化を可能にするBrdU取り込みの後、増殖を分析した。HCAECおよびvSMCの場合には、brdUをインヒビターと共に加えた。NIH3T3の場合には、最後の3時間の間のみ、それを加えた。細胞を4%パラホルムアルデヒド中で固定した。
細胞を24ウェルプレート内でコンフルエント単層として培養した(ウェル当たり30000細胞をプレーティング)。該単層を0.1% 血清(またはHCAECの場合には栄養サプリメント)中で24時間飢餓させ、200μlピペットの先端でウェルを横切る線の創傷を加え、ついでそれを、U0126(10μΜ)、パクリタキセル(10nM/l)、VIVIT(100μΜ)またはTAT−DEF−c−FOS(3、6、12μM)の存在下または非存在下、10% 血清(またはHCAECの場合は栄養サプリメント)と共に24〜72時間インキュベートした。細胞を4% パラホルムアルデヒド中で固定し、ついでクレシルバイオレット染料(メタノール中、1%)で染色した。顕著な創傷の位置を可視化するために写真を撮影した。創傷治癒効果を、NIH ImageJプログラムを使用して測定し、病変の回復の百分率として表した。
1)vSMCに対するTAT−DEF−c−Fosの抗増殖特性
本発明者らは、まず、TAT−DEF−Elk−1、TAT−DEF−c−Fos、ERKの古典的インヒビターおよび細胞増殖の古典的インヒビターの抗増殖特性をvSMC上で試験し、比較した(図3)。本発明者らは、血清(10%)により誘導される細胞増殖およびBrdU取り込みの古典的プロトコルを用いた。ニューロン細胞における本発明者らの過去の結果(Lavaurら,2007を参照されたい)に基づいて、3つの異なる用量(3〜12μM)のペプシグナルを試験した。TAT−DEF−c−Fosは3、6および12μMで抗腫瘍特性を示す(がTAT−DEF−Elk−1は示さない)ことを、本発明者らは見出した。結果は6および12μMの用量において再現性がより高かったため、他の実験は6または12μMで行った。12μMにおいては、この抗腫瘍効果はERKの古典的インヒビター、またはこの細胞系に対して古典的に使用される細胞増殖のインヒビターに匹敵した(図3c)。
本発明者らは悪性NF1細胞増殖に対するTAT−DEF−c−Focの効力を試験した(図9)。この目的のために、NF1患者からの悪性末梢神経鞘腫瘍(MPNST)からのヒト細胞系を使用した。
次に、本発明者らは線維芽細胞(NIH3T3細胞)に対するTAT−DEF−c−Focペプチドの効力を試験した(図6)。この細胞系においては、TAT−DEF−c−Focペプチドの効力は低い用量(1〜12μM)で見出されたが、ERKインヒビターU0126は増殖を抑制しなかった。このデータは線維芽細胞増殖に関するc−Fosに対するERK活性の特異性を示している。
増殖の古典的インヒビター、MEKインヒビターまたはペプチド(漸増用量)を、10% 血清の存在下、vSMCに単一適用で適用し(図7A)、PFA固定およびヘキスト染色の後、毒性を評価した。生細胞の計数を行い、ヘキスト陽性細胞数(核標識完全性を示す)として表した。この細胞系に対する細胞増殖の古典的インヒビター(VIVIT)が毒性を示したのとは対照的に、細胞増殖を抑制するために用いた用量(3〜12μM)のTAT−DEF−c−Focの存在下では毒性は全く観察されなかった(図3Bを参照されたい)。本発明者らはまた、複数適用後のTAT−DEF−c−Focの毒性を評価した(図7B)。この実験においては、該ペプチドを血清の存在下で24時間ごとに適用した。該細胞を固定し、ヘキストで染色した(24、48または72時間の時点で行った)。6μMにおいては、該ペプチドは、どのような適用回数でも、ヘキスト陽性細胞の数を変化させなかった。12μMにおいては、それは48および72時間後に毒性を示した。
創傷治癒プロトコルを用いて浸潤特性を調べた。vSMC細胞のクレシルバイオレット染色の後、病変回復の百分率を測定した(図8)。24時間の時点で、参照化合物VIVITは浸潤の有意な抑制を示した(約30%の回復;一方、血清のみの存在下では78%)。この抑制は維持された。なぜなら、それは78時間の血清適用の後に尚も有意であったからである(35%の回復;一方、血清のみの存在下では110%)。しかし、その毒性作用ゆえに、この抑制は細胞死に関連づけられうる。
TAT−DEF−c−FocペプチドはvSMC、PNMTおよびNIH3T3細胞系に対する抗増殖特性を有する。
方法
本発明者らは更に、末梢神経鞘腫瘍(MPNST)細胞系sNF96.2(これは参照番号ATCC(R)CRL−2884(TM)としてATCCに寄託されている)において、4つの異なるペプチドを試験した。
本発明者らは3つの独立した実験を行った。この場合、各点は、各実験に関して二重重複で行った。
結論として、ペプチドTAT−DEF−c−Fosおよびペネトラチン−DEF−c−Fosは共に、MPNSTに対する抑制効果を示す。しかし、TAT−DEF−c−Fosのほうが高い効力を示す。
Claims (17)
- ・Ras/ERK経路における突然変異により引き起こされるかまたは該突然変異が関与している、および/または
・c−Fosの産生の増加に関連している
癌の予防および/または治療における使用のためのc−Fosの選択的インヒビターであって、c−Fosの選択的インヒビターが、
・少なくとも1つの細胞透過性配列と、
・配列番号29(FVFTYPEA)を含むアミノ酸配列
とを含むペプチドである、c−Fosの選択的インヒビター。 - Ras/ERK経路における突然変異により引き起こされるかまたは該突然変異が関与している癌が、RafまたはRasの突然変異により引き起こされるかまたは該突然変異が関与している、請求項1記載の使用のためのc−Fosの選択的インヒビター。
- 癌が、結腸癌、膵臓癌、黒色腫、甲状腺癌、肺癌および白血病、および卵巣癌からなる群から選択される、請求項2記載の使用のためのc−Fosの選択的インヒビター。
- Ras/ERK経路における突然変異により引き起こされるかまたは該突然変異が関与している癌が、NF1の突然変異により引き起こされるかまたは該突然変異が関与している、請求項1記載の使用のためのc−Fosのインヒビターペプチド。
- 癌が、神経膠腫、若年性骨髄単球性白血病および神経線維腫からなる群から選択される、請求項4記載の使用のためのc−Fosの選択的インヒビター。
- c−Fosの産生の増加に関連している癌が、頸部肝細胞癌、膵臓癌、乳癌、骨肉腫および子宮内膜癌からなる群から選択される、請求項1記載の使用のためのc−Fosのインヒビターペプチド。
- 転移の予防方法における使用のためのc−Fosの選択的インヒビターであって、c−Fosの選択的インヒビターが、
・少なくとも1つの細胞透過性配列と、
・配列番号29(FVFTYPEA)を含むアミノ酸配列
とを含むペプチドである、c−Fosの選択的インヒビター。 - 血管形成術およびステント移植の後の血管平滑筋細胞の増殖を抑制および/または予防するための使用のためのc−Fosの選択的インヒビターであって、c−Fosの選択的インヒビターが、
・少なくとも1つの細胞透過性配列と、
・配列番号29(FVFTYPEA)を含むアミノ酸配列
とを含むペプチドであり、ペプチドが、血管形成術およびステント移植の後の再狭窄に罹患した患者を治療するために使用される、c−Fosの選択的インヒビター。 - ステントが、薬物溶出性ステントである、請求項8記載の使用のためのc−Fosの選択的インヒビター。
- 神経線維腫症の予防および/または治療における、使用のためのc−Fosの選択的インヒビターであって、少なくとも1つの細胞透過性配列と、配列番号29(FVFTYPEA)を含むアミノ酸配列とを含む、c−Fosの選択的インヒビター。
- アミノ酸配列が、配列番号39(CTTYTSSFVFTYPEADSFPS)である、請求項1〜10のいずれか1項記載の使用のためのc−Fosの選択的インヒビター。
- 細胞透過性配列が、
・HIV−TAT配列(配列番号2)、
・ペネトラチン(配列番号3)、
・7〜11個のアルギニンのアミノ酸配列(配列番号4〜8)、
・配列番号9〜12のような配列内にランダムに位置する7〜11個のアルギニンを含む7〜25アミノ酸のX7/11R配列、および
・DPVに由来する配列(配列番号13〜17)
からなる群から選択される、請求項1〜12のいずれか1項記載の使用のためのc−Fosの選択的インヒビター。 - ペプチドが配列番号26(GRKKRRQRRRPPCTTYTSSFVFTYPEADSFP)または配列番号36(GRKKRRQRRRPPCTTYTSSFVFTYPEADSFPS)の配列を有する、請求項1〜13のいずれか1項記載の使用のためのc−Fosの選択的インヒビター。
- ・結腸癌、膵臓癌、黒色腫、卵巣癌、肺癌、甲状腺癌、白血病、若年性骨髄単球性白血病、神経膠腫、神経線維腫、頸部肝細胞癌、乳癌、骨肉腫および子宮内膜癌からなる群から選択される癌、および/または
・神経線維腫症
を予防および/または治療するための使用のための医薬組成物であって、
a)請求項1〜14のいずれか1項記載のc−Fosの選択的インヒビターの少なくとも1つ、
b)前記ペプチドをコードする核酸、または
c)前記核酸を含む発現ベクター
を含む医薬組成物。 - 神経線維腫症が、神経線維腫症Iである、請求項15に記載の予防および/または治療するための使用のための医薬組成物。
- 神経線維腫症が、神経鞘腫瘍を示す、請求項10に記載の使用のためのc−Fosの選択的インヒビター。
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