JP6895883B2 - オキシントモジュリン類似体、薬物組成物、糖尿病治療薬、血糖降下薬及び体重低下薬 - Google Patents
オキシントモジュリン類似体、薬物組成物、糖尿病治療薬、血糖降下薬及び体重低下薬 Download PDFInfo
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- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
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Description
グルカゴン様ペプチド−1の親配列(配列番号26):His−Ala−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Val−Ser−Ser−Tyr−Leu−Glu−Gly−Gln−Ala−Ala−Lys−Glu−Phe−Ile−Ala−Trp−Leu−Val−Lys−Gly−Arg−Gly−OH、
エキセナチドの親配列(配列番号27):His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−Lys−Gln−Met−Glu−Glu−Glu−Ala−Val−Arg−Leu−Phe−Ile−Glu−Trp−Leu−Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2、
グルカゴンの親配列(配列番号28):His−Ser−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Ser−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−OH。
His−Xaa2−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Xaa10−Ser−Lys−Xaa13−Leu−Asp−Xaa16−Xaa17−Xaa18−Ala−Xaa20−Xaa21−Phe−Xaa23−Xaa24−Trp−Leu−Xaa27−Xaa28−Xaa29−Xaa30−Xaa31−Xaa32−Xaa33−Xaa34−Xaa35−Xaa36−Xaa37−Xaa38−Xaa39−Xaa40−COR1、そのうち、
R1=−OH又は−NH2、
Xaa2=Aib、Ser又はD−Ser、
Xaa10=Lys又はTyr、
Xaa13=Lys又はTyr、
Xaa16=Ser、Aib又はLys、
Xaa17=Lys又はArg、
Xaa18=Arg又はAla、
Xaa20=His、Gln又はLys、
Xaa21=Asp又はGlu、
Xaa23=IIe、Leu又はVal、
Xaa24=Glu又はGln、
Xaa27=Met又はLeu、
Xaa28=Ser、Asp、Asn又はArg、
Xaa29=Ala、Gly又はThr、
Xaa30=Gly、
Xaa31=Gly、
Xaa32=Pro、
Xaa33=Ser、
Xaa34=Ser、
Xaa35=Gly、
Xaa36=Ala、
Xaa37=Pro、
Xaa38=Pro、
Xaa39=Pro、
Xaa40=Serである。
His−Xaa2−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Xaa10−Ser−Lys−Xaa13−Leu−Asp−Xaa16−Xaa17−Xaa18−Ala−Xaa20−Xaa21−Phe−Xaa23−Xaa24−Trp−Leu−Xaa27−Xaa28−Xaa29−Xaa30−Xaa31−Xaa32−Xaa33−Xaa34−Xaa35−Xaa36−Xaa37−Xaa38−Xaa39−Xaa40−COR1、そのうち、
R1=−NH2、
Xaa2=Aib又はD−Ser、
Xaa10=Lys又はTyr、
Xaa13=Lys又はTyr、
Xaa16=Ser、Aib又はLys、
Xaa17=Lys又はArg、
Xaa18=Arg又はAla、
Xaa20=His、Gln又はLys、
Xaa21=Asp又はGlu、
Xaa23=IIe又はVal、
Xaa24=Glu又はGln、
Xaa27=Met又はLeu、
Xaa28=Asn、Arg又はAsp、
Xaa29=Gly又はThr又は非存在、
Xaa30=Gly、
Xaa31=Gly、
Xaa32=Pro、
Xaa33=Ser、
Xaa34=Ser、
Xaa35=Gly、
Xaa36=Ala、
Xaa37=Pro、
Xaa38=Pro、
Xaa39=Pro、
Xaa40=Serである。
〜11である。
化合物1(配列番号1):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Ser−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Ala−Ala−His−Asp−Phe−Val−Glu−Trp−Leu−Leu−Arg−Ala−NH2
化合物2(配列番号2):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Glu−Lys−Ala−Ala−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Glu−Phe−Ile−Glu−Trp−Leu−Leu−Arg−Ala−NH2
化合物3(配列番号3):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Ser−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Ala−Ala−His−Asp−Phe−Val−Glu−Trp−Leu−Leu−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物4(配列番号4):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Glu−Lys−Ala−Ala−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Glu−Phe−Ile−Glu−Trp−Leu−Leu−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物5(配列番号5):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−CO(CH2)14CH3)−Ser−Lys−Tyr−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物6(配列番号6):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−CO(CH2)16CO2H)−Ser−Lys−Tyr−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物7(配列番号7):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−Glu−CO(CH2)14CH3)−Ser−Lys−Tyr−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物8(配列番号8):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Ser−Lys−Tyr−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物9(配列番号9):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Lys(PEG2−PEG2−CO(CH2)16CO2H)−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物10(配列番号10):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Lys(PEG2−PEG2−Glu−CO(CH2)14CH3)−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物11(配列番号11):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物12(配列番号12):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Aib−Lys(PEG2−PEG2−CO(CH2)16CO2H)−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物13(配列番号13):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Aib−Lys(PEG2−PEG2−Glu−CO(CH2)14CH3)−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物14(配列番号14):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Aib−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物15(配列番号15):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys(PEG2−PEG2−CO(CH2)14CH3)−Lys−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物16(配列番号16):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys(PEG2−PEG2−CO(CH2)16CO2H)−Lys−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物17(配列番号17):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys(PEG2−PEG2−Glu−CO(CH2)14CH3)−Lys−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物18(配列番号18):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Lys−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物19(配列番号19):His−Aib−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−Glu−CO(CH2)14CH3)−Ser−Lys−Tyr−Leu−Asp−Glu−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Leu−Asp−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物20(配列番号20):His−Aib−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Ser−Lys−Tyr−Leu−Asp−Glu−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Leu−Asp−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物21(配列番号21):His−Aib−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−Glu−CO(CH2)14CH3)−Ser−Lys−Tyr−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Leu−Asp−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物22(配列番号22):His−Aib−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Ser−Lys−Tyr−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Leu−Asp−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物23(配列番号23):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Glu−Lys−Ala−Ala−Lys(PEG2−PEG2−CO(CH2)14CH3)−Glu−Phe−Ile−Glu−Trp−Leu−Leu−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
化合物24(配列番号24):His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Glu−Lys−Ala−Ala−Lys(PEG2−PEG2−Glu−CO(CH2)14CH3)−Glu−Phe−Ile−Glu−Trp−Leu−Leu−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2
Boc t−ブトキシカルボニル基、Fmoc フルオレニルメトキシカルボニル基、t−Bu t−ブチル基、ivDDe 1−(4,4−ジメチル−2,6−ジオキソシクロヘキシリデン)−3−メチルブチルの脱保護と親油基、resin 樹脂、TFA トリフルオロ酢酸、EDT 1,2−エタンジチオール、フェノール フェノール、FBS ウシ胎児血清、BSA ウシ血清アルブミン、HPLC 高速液体クロマトグラフィー、GLP−1R グルカゴン様ペプチド−1受容体、GCGR グルカゴン受容体、GLP−1 グルカゴン様ペプチド−1、mPEG モノメトキシポリエチレングリコール、OXM オキシントモジュリン、His ヒスチジン、Ser セリン、D−Ser D−型セリン、Gln グルタミン、Gly グリシン、Glu グルタミン酸、Ala アラニン、Thr トレオニン、Lys リシン、Arg アルギニン、Tyr チロシン、Asp アスパラギン酸、Trp トリプトファン、Phe フェニルアラニン、IIe イソロイシン、Leu ロイシン、Cys システイン、Pro プロリン、Val バリン、Met メチオニン、Asn アスパラギン、HomoLys ホモリシン、Orn オルニチン、Dap ジアミノピメリン酸、Dab 2,4−ジアミノ酪酸。
オクタデカン二酸(31.4g、100mmol)をトルエン250mLに懸濁した後に混合物を加熱還流し、N,N−ジメチルホルムアミドジ−t−ブチルアセタール(50.9g、250mmol)を1滴ずつ4時間かけて滴下し、混合物を還流しながら一晩反応させた。溶媒を真空条件下で除去した後、50℃で粗物質をDCM/酢酸エチルエステル(500mL、1:1)に懸濁して15分間攪拌した。固形物を濾過し、200mLのDCMに回収して研磨を行い、濾過、真空蒸留して粗モノt−ブチルヘキサデカン20gを得た。そして、ヘプタン200mLで再結晶することによりクタデカン二酸モノ−t−ブチルエステル12.9gを得、収率は33%であった。再結晶以外でも、該モノエステルをAcOEt/ヘプタンを溶出溶媒とするシリカカラムで精製することができる。1H−NMR(400MHz,CDCl3)δ:2.35(t,2H),2.20(t,2H),1.65−1.55(m,4H),1.44(s,9H),1.34−1.20(m,22H)。
ペプチド化合物1及びペプチド化合物5を以下の手順で合成した。
ペプチド化合物1の配列構造は、His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Ser−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Ala−Ala−His−Asp−Phe−Val−Glu−Trp−Leu−Leu−Arg−Ala−NH2であった。
Fmoc/t−Bu法を利用し、CS336Xペプチド合成装置(米国CS Bio社製)を用いて0.25molのスケールで下記ペプチド合成した。
Boc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Tyr(t−Bu)−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Ser(OtBu)−Lys(ivDde)−Ala−Ala−His(Boc)−Asp(OtBu)−Phe−Val−Glu(OtBu)−Trp(Boc)−Leu−Leu−Arg(pbf)−Ala−リンクアミド樹脂
N−メチルピロリドンとジクロロメタンとが体積比で1:1の溶液において、上記1a.で合成した保護基が付いているペプチド基樹脂を2回洗浄した後、新たに調製したヒドラジン水和物を2.0%含むN−メチルピロリドン溶液を加え、該反応物を室温下で12分間振蕩し、濾過を行った。ヒドラジン処理を2回繰り返してBoc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Tyr(t−Bu)−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Ser(OtBu)−Lys−Ala−Ala−His(Boc)−Asp(OtBu)−Phe−Val−Glu(OtBu)−Trp(Boc)−Leu−Leu−Arg(pbf)−Ala−リンクアミド樹脂を得た。続いて、ジクロロメタンとN−メチルピロリドンを用いて樹脂を十分洗浄し、N−メチルピロリドンにFmoc−NH−PEG2−OH、ベンゾトリアゾール−N,N,N’,N’−テトラメチルウロニウムヘキサフルオロホスファート、1−ヒドロキシベンゾトリアゾール及びジイソプロピルエチルアミンを混合してなるカップリング溶液を加え、3時間振蕩してから濾過、洗浄した。ヒドラジン処理を2回繰り返し、Boc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Tyr(t−Bu)−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Ser(OtBu)−Lys(Fmoc−PEG2−OH)−Ala−Ala−His(Boc)−Asp(OtBu)−Phe−Val−Glu(OtBu)−Trp(Boc)−Leu−Leu−Arg(pbf)−Ala−リンクアミド樹脂を得た後、ピペリジン/N,N−ジメチルホルムアミド溶液を用いてFmoc基を除去した。そして、Fmoc−PEG2−OHを用いる縮合反応を更に1回繰り返し、Boc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Tyr(t−Bu)−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Ser(OtBu)−Lys(Fmoc−PEG2−PEG2−OH)−Ala−Ala−His(Boc)−Asp(OtBu)−Phe−Val−Glu(OtBu)−Trp(Boc)−Leu−Leu−Arg(pbf)−Ala−リンクアミド樹脂を得た。ピペリジン/N,N−ジメチルホルムアミド溶液を用いてFmoc基を除去し、通常の条件下で順にFmoc−Glu−OtBu、t−ブチルによって保護されているオクタデカン脂肪酸を縮合させ、Boc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Tyr(t−Bu)−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Ser(OtBu)−Lys(Fmoc−PEG2−PEG2−Glu−CO(CH2)16CO2tBu)−Ala−Ala−His(Boc)−Asp(OtBu)−Phe−Val−Glu(OtBu)−Trp(Boc)−Leu−Leu−Arg(pbf)−Ala−リンクアミド樹脂を得た。
Boc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Tyr(t−Bu)−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Ser(OtBu)−Lys(Fmoc−PEG2−PEG2−Glu−CO(CH2)16CO2tBu)−Ala−Ala−His(Boc)−Asp(OtBu)−Phe−Val−Glu(OtBu)−Trp(Boc)−Leu−Leu−Arg(pbf)−Ala−リンクアミド樹脂を丸底フラスコに入れ、氷浴の条件下でTFA/EDT/フェノール/H2Oが体積比で88/2/5/5の分解液を加え、分解液の温度を25℃に保持しつつ120分間反応させた。濾過をした後、濾過ケーキを少量のトリフルオロ酢酸で3回洗浄し、濾液を集めて回収した。そして、濾液を攪拌しながらゆっくりと冷たいエテールに注ぎ、1時間以上静置した。沈降が十分行われると、上澄液を捨て、遠心して沈降物を回収し、冷たいエテールで6回洗浄して粗物質としてHis−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Tyr−Ser−Lys−Tyr−Leu−Asp−Ser−Lys(PEG2−PEG2−Glu−CO(CH2)16CO2H)−Ala−Ala−His−Asp−Phe−Val−Glu−Trp−Leu−Leu−Arg−Ala−NH2化合物を得た。
上記1cで得られた粗物質を、アセトニトリルとH2Oとが体積比で1:1の溶液に酢酸を5.0%含む溶液に溶かし、5.0m逆相C18が充填されているカラム(カラム規格:50mmx250mm)で2回精製を行った。具体的には、試料を注入した後、30〜60%アセトニトリル‐0.1%トリフルオロ酢酸/H2Oの勾配、流速40mL/分間で45分間かけてカラムを洗い流し、ペプチドを含む画分を回収し、アセトニトリルを除去してから凍結乾燥させた。精製後のHPLC純度は95%を超え、精製済みの産物を液体クロマトグラフィー質量分析法(LC−MS)で分析したところ、プロトン化分子イオンピークのm/z値が4116.0であり、理論値が4116.6であった。
ペプチド化合物5の配列構造は、His−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−CO(CH2)14CH3)−Ser−Lys−Tyr−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2であった。
Fmoc/t−Bu法を利用し、CS336Xペプチド合成装置(米国CS Bio社製)を用いて0.25molのスケールで下記ペプチド合成した。
Boc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Lys(ivDde)−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Aib−Arg(Pbf)−Arg(Pbf)−Ala−Gln(Trt)−Asp(OtBu)−Phe−Val−Gln(Trt)−Trp(Boc)−Leu−Met−Asn(Trt)−Thr(t−Bu)−Gly−Gly−Pro−Ser(t−Bu)−Ser(t−Bu)−Gly−Ala−Pro−Pro−Pro−Ser(t−Bu)−リンクアミド樹脂
N,N−ジメチルホルムアミドとジクロロメタンとが体積比で1:1の溶液において樹脂を2回洗浄した後、新たに調製したヒドラジン水合物が3.0%のN,N−ジメチルホルムアミド溶液を加え、該反応物溶液を室温下で10〜30分間振蕩し、濾過した。ヒドラジン処理を5回繰り返してBoc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Lys−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Aib−Arg(Pbf)−Arg(Pbf)−Ala−Gln(Trt)−Asp(OtBu)−Phe−Val−Gln(Trt)−Trp(Boc)−Leu−Met−Asn(Trt)−Thr(t−Bu)−Gly−Gly−Pro−Ser(t−Bu)−Ser(t−Bu)−Gly−Ala−Pro−Pro−Pro−Ser(t−Bu)−リンクアミド樹脂を得た。次に、順にN,N−ジメチルホルムアミド、ジクロロメタン、メタノール、ジクロロメタン、N,N−ジメチルホルムアミドを用いて樹脂をそれぞれ3回洗浄した。
Boc−His(Boc)−D−Ser(t−Bu)−Gln(OtBu)−Gly−Thr(t−Bu)−Phe−Thr(t−Bu)−Ser(tBu)−Asp(OtBu)−Lys(PEG2−PEG2−C16)−Ser(t−Bu)−Lys(Boc)−Tyr(t−Bu)−Leu−Asp(OtBu)−Aib−Arg(Pbf)−Arg(Pbf)−Ala−Gln(Trt)−Asp(OtBu)−Phe−Val−Gln(Trt)−Trp(Boc)−Leu−Met−Asn(Trt)−Thr(t−Bu)−Gly−Gly−Pro−Ser(t−Bu)−Ser(t−Bu)−Gly−Ala−Pro−Pro−Pro−Ser(t−Bu)−リンクアミド樹脂に、TFA、フェノール、チオアニソール、EDT及び水が体積比で82.5:5:5:2.5:5の分解液を加えた後、加熱して分解液の温度を25℃にし、2.5時間反応させた。反応終了後に濾過し、濾過ケーキを少量の分解液で3回洗浄し、濾液を集めて回収した。濾液を攪拌しながらゆっくりと冷たいエテールに注ぎ、2時間以上静置して完全に沈降させ、遠心して沈降物を回収し、冷たいエテールで3回洗浄して粗物質としてHis−(D−Ser)−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Lys(PEG2−PEG2−CO(CH2)14CH3)−Ser−Lys−Tyr−Leu−Asp−Aib−Arg−Arg−Ala−Gln−Asp−Phe−Val−Gln−Trp−Leu−Met−Asn−Thr−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−NH2化合物を得た。
上記2cで得られる粗物質をアセトニトリルとH2Oとが体積比で1:2の混合液に溶かし、5.0m逆相C18が充填されているカラム(カラム規格:46mmx250mm)で精製した。具多的には、30%アセトニトリル(トリフルオロ酢酸を0.05%含む。)/水(トリフルオロ酢酸を0.05%含む。)を開始溶出液とし、速度1.33%/分間でアセトニトリルの割合を増やして勾配を構成し、流速15mL/分間、30分間の条件下でカラムを洗い流して、ペプチドを含む画分を回収して凍結乾燥させた。精製後のHPLC純度は95%を超え(純度が95%未満の場合、更にHPLC精製を1回繰り返してもよい。)、精製済みの産物を液体クロマトグラフィー質量分析法(LC−MS)で分析した。本発明において、以上の手順に従って下記表1〜表4に示すペプチド化合物を合成した。
Cisbo社製のcAMP測定キットを用いてグルカゴン様ペプチド−1受容体とグルカゴン受容体に対する刺激作用を測定し、グルカゴン様ペプチド−1、エキセナチド及びグルカゴンそれぞれの標準品を陽性コントロールとして用量反応曲線を作成した。
オスCD1マウス(南京大学モデル動物研究センターより購入)に対して、それぞれ上記実施例で得られた化合物4、5、6、7、19、20、21、22、23及び24と、市販ルートで購入したエキセナチド標準品(Ex−4)を250μg/kgの投与量で静脈内注射方式(IV)又は皮下注射方式(SC)にて投与し、比較試験を行った。投与後、0〜24時間に亘って異なる時点で採血し、血漿サンプルを調製してLC−MS/MS解析を行った。IV方式で得られたデータについてはモデル依存性の方法に基づき、SC方式で得られたデータについてはモデル非依存性の方法に基づいて薬物動態パラメーターを算出した。IV方式で投与した化合物4、5、6、7、19、20、21、22、23及び24は半減期が約4〜6時間であり、濃度ピークに到達する時間(Tmax)が約12時間であるのに対し、エキセナチドの半減期は約0.5時間であった。また、SC方式で投与した化合物4、5、6、7、19、20、21、22、23及び24は濃度ピークに到達する時間(Tmax)が約12時間以上であり、その一方、Ex−4の半減期が約2時間であった。IV方式又はSC方式にて化合物4、5、6、7、19、20、21、22、23及び24を投与した場合、何れも不良反応がなかった。
12〜16週齢のオスC57B1/6Jマウス(南京大学モデル動物研究センターより購入)の尻尾から末梢血を採取し、末梢血の血糖値に基づきマウスをランダムに数グループに分け、各グループは8匹ずつであった。禁食して6時間が経った後、動物に測定サンプルを投与し、更に約4時間経ってから最初の血液サンプルを採取し、空腹時の血中ブドウ糖値を測定した。そして、グルコースを経口投与してから動物を飼育箱に戻し(t=0)、更にt=15分、t=30分、t=60分、t=90分及びt=120分の時点で血液を採取して血糖値を測定した。そして、グルコースの経口投与を繰り返し、8時間かけて血糖値の経時的変化を観測した。ここで。250μg/kgの基準でペプチド4、5、6、7、19、20、21、22、23及び24を投与した場合、経口ブドウ糖負荷が著しく低下することが分かった。GraphPad Prismソフトで血糖変化曲線を作成し、曲線下面積(AUC)を求めることで図3及び図4に示すようなAUC図が得られた。
25週齢のDIOマウス(南京大学モデル動物研究センターより購入)40匹をランダムに5つのグループに分け(化合物4、5、6、7及び生理食塩水グループ)、各グループは8匹ずつであり、体重指数に顕著な差がないようにした。マウスに1日1回、皮下注射方式でそれぞれ化合物4、化合物5、化合物6、化合物7及び生理食塩水后を投与し、投与量は何れも250μg/kgであり、投与後に体重を測定した。図5に示すように、化合物4、5、6、7を投与したグループは、11日目から30日目にかけて生理食塩水グループに比べてマウス体重が約20%低下し、有意差を示した(P<0.05)。
Claims (8)
- 下記アミノ酸配列で表される親配列からなり、グルカゴン様ペプチド−1受容体及びグルカゴン受容体(GLP−1R/GCGR)をダブルターゲットとして作動するオキシントモジュリン類似体であって、
His−Xaa2−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Xaa10−Ser−Lys−Xaa13−Leu−Asp−Xaa16−Xaa17−Xaa18−Ala−Xaa20−Xaa21−Phe−Xaa23−Xaa24−Trp−Leu−Xaa27−Xaa28−Xaa29−Xaa30−Xaa31−Xaa32−Xaa33−Xaa34−Xaa35−Xaa36−Xaa37−Xaa38−Xaa39−Xaa40−COR1、そのうち、
R1=−OH又は−NH2、
Xaa2=Aib、Ser又はD−Ser、
Xaa10=Lys又はTyr、
Xaa13=Lys又はTyr、
Xaa16=Ser、Aib又はLys、
Xaa17=Lys又はArg、
Xaa18=Arg又はAla、
Xaa20=His、Gln又はLys、
Xaa21=Asp又はGlu、
Xaa23=IIe、Leu又はVal、
Xaa24=Glu又はGln、
Xaa27=Met又はLeu、
Xaa28=Ser、Asp、Asn又はArg、
Xaa29=Ala、Gly又はThr、
Xaa30=Gly、
Xaa31=Gly、
Xaa32=Pro、
Xaa33=Ser、
Xaa34=Ser、
Xaa35=Gly、
Xaa36=Ala、
Xaa37=Pro、
Xaa38=Pro、
Xaa39=Pro、
Xaa40=Serであり、
前記アミノ酸配列において、Xaa10、Xaa16及びXaa20のうち少なくとも1個のアミノ酸残基がLysであり、前記少なくとも1個のLysの側鎖は架橋単位を介して親油基と結合し、
前記Lysの側鎖が前記架橋単位を介して前記親油基と結合してできる構造は、下記化1〜化4の構造から選ばれる任意の1種であることを特徴とする、オキシントモジュリン類似体。
- 前記架橋単位を介して前記親油基に結合するLys残基は、HomoLys、Orn、Dap又はDabによって置換されている、請求項1に記載のオキシントモジュリン類似体。
- 前記親配列は、下記アミノ酸配列であり、
His−Xaa2−Gln−Gly−Thr−Phe−Thr−Ser−Asp−Xaa10−Ser−Lys−Xaa13−Leu−Asp−Xaa16−Xaa17−Xaa18−Ala−Xaa20−Xaa21−Phe−Xaa23−Xaa24−Trp−Leu−Xaa27−Xaa28−Xaa29−Xaa30−Xaa31−Xaa32−Xaa33−Xaa34−Xaa35−Xaa36−Xaa37−Xaa38−Xaa39−Xaa40−COR1、そのうち、
R1=−NH2、
Xaa2=Aib又はD−Ser、
Xaa10=Lys又はTyr、
Xaa13=Lys又はTyr、
Xaa16=Ser、Aib又はLys、
Xaa17=Lys又はArg、
Xaa18=Arg又はAla、
Xaa20=His、Gln又はLys、
Xaa21=Asp又はGlu、
Xaa23=IIe又はVal、
Xaa24=Glu又はGln、
Xaa27=Met又はLeu、
Xaa28=Asn、Asp又はArg、
Xaa29=Gly又はThr、
Xaa30=Gly、
Xaa31=Gly、
Xaa32=Pro、
Xaa33=Ser、
Xaa34=Ser、
Xaa35=Gly、
Xaa36=Ala、
Xaa37=Pro、
Xaa38=Pro、
Xaa39=Pro、
Xaa40=Serである、請求項1に記載のオキシントモジュリン類似体。 - 前記親配列は、配列番号5、配列番号6、配列番号7、配列番号8、配列番号9、配列番号10及び配列番号11からなる群より選ばれる任意の1種のアミノ酸配列である、請求項3に記載のオキシントモジュリン類似体。
- 請求項1又は3に記載のオキシントモジュリン類似体を含んでなる薬物組成物。
- 請求項1又は3に記載のオキシントモジュリン類似体を用いて得られた糖尿病治療薬。
- 請求項1又は3に記載のオキシントモジュリン類似体を用いて得られた血糖降下薬。
- 請求項1又は3に記載のオキシントモジュリン類似体を用いて得られた体重低下薬。
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