JP5174022B2 - 膵臓β細胞増加促進剤及び膵臓β細胞増加促進組成物 - Google Patents
膵臓β細胞増加促進剤及び膵臓β細胞増加促進組成物 Download PDFInfo
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Description
また、本発明者らは、アデノウイルスベクターを使用した強制発現系において、hCF266がin vivoで膵臓β細胞増加促進作用を示すこと、mCF266のトランスジェニックマウスにおいて膵臓β細胞の増加が促進されることなどを見出した。さらに、本発明者らは、hCF266によりコードされるアミノ酸配列を有するポリペプチドのフラグメントである合成ポリペプチドについても、同様の作用を示すことを見出した。なお、膵臓β細胞の増加が促進される要因としては、膵臓β細胞の増殖促進、膵臓β細胞の破壊抑制のいずれもが考えられるが、本明細書ではその両者を合わせて「膵臓β細胞増加促進」と称する。
本発明は、このような知見に基づいて完成されたものである。
(a)配列番号1又は配列番号4に記載の塩基配列からなるDNAによりコードされるアミノ酸配列からなるポリペプチド、
(b)配列番号1又は配列番号4に記載の塩基配列からなるDNAによりコードされるアミノ酸配列において1若しくは数個のアミノ酸が置換、欠失、及び/又は付加されたアミノ酸配列からなり、かつ、膵臓β細胞増加促進作用を持つポリペプチド、
(c)膵臓β細胞増加促進作用を持つ(a)又は(b)のポリペプチドのフラグメント。
(d)配列番号3又は配列番号6に記載のアミノ酸配列からなるポリペプチド、
(e)配列番号3又は配列番号6に記載のアミノ酸配列において1若しくは数個のアミノ酸が置換、欠失、及び/又は付加されたアミノ酸配列からなり、かつ、膵臓β細胞増加促進作用を持つポリペプチド、
(f)膵臓β細胞増加促進作用を持つ(d)又は(e)のポリペプチドのフラグメント。
(a)配列番号1又は配列番号4に記載の塩基配列からなるDNAによりコードされるアミノ酸配列からなるポリペプチド、
(b)配列番号1又は配列番号4に記載の塩基配列からなるDNAによりコードされるアミノ酸配列において1若しくは数個のアミノ酸が置換、欠失、及び/又は付加されたアミノ酸配列からなり、かつ、膵臓β細胞増加促進作用を持つポリペプチド、
(c)膵臓β細胞増加促進作用を持つ(a)又は(b)のポリペプチドのフラグメント。
宿主細胞としては、細菌、酵母、昆虫細胞、動物細胞など、公知の細胞を適宜使用することができる。動物細胞としては、HEK293細胞、HEK293T細胞、CHO−K1細胞、COS細胞などが挙げられる。
参考例1では、SST法を採用してマウスの腸管から取得したmCF266のmRNAの部位別発現分布をノザンブロット法により検討した。
参考例2では、CF266をトランスフェクトした胎児腎臓上皮細胞由来細胞株HEK293T細胞の培養上清によるMIN6細胞に対する作用を確認した。
参考例3では、mCF266を発現するアデノウイルスベクターを用いて、2型糖尿病モデルマウスであるKK/Ayマウスに対するmCF266の作用を確認した。
参考例4では、hCF266(27V)をトランスフェクトしたHEK293T細胞の培養上清に含まれるポリペプチドを化学合成し、合成したポリペプチドによるマウス膵臓ランゲルハンス氏島細胞に対する作用を確認した。
実施例1では、hCF266(27V)を発現するアデノウイルスベクターを用いて、1型糖尿病モデルマウスであるSTZマウスに対するhCF266(27V)の作用を確認した。
実施例2では、トランスジェニックマウスにおけるmCF266の作用を確認した。
実施例3では、参考例4と同様にして化学合成したポリペプチドA〜Cによる1型糖尿病モデルSTZマウスに対する作用を確認した。
Claims (7)
- 次の(a)及び(b)の少なくとも1つを有効成分とする膵臓β細胞増加促進剤;
(a)配列番号1又は配列番号4に記載の塩基配列からなるDNAによりコードされるアミノ酸配列からなるポリペプチド、
(b)配列番号1又は配列番号4に記載の塩基配列からなるDNAによりコードされるアミノ酸配列において1若しくは数個のアミノ酸が置換、欠失、及び/又は付加されたアミノ酸配列からなり、かつ、膵臓β細胞増加促進作用を持つポリペプチド。 - 配列番号4に記載の塩基配列からなるDNAによりコードされるアミノ酸配列において1若しくは数個のアミノ酸が置換、欠失、及び/又は付加されたアミノ酸配列からなり、かつ、膵臓β細胞増加促進作用を持つポリペプチドが、配列番号7に記載の塩基配列からなるDNAによりコードされるアミノ酸配列からなるポリペプチドである、請求項1記載の膵臓β細胞増加促進剤。
- 次の(d)〜(f)の少なくとも1つを有効成分とする膵臓β細胞増加促進剤;
(d)配列番号3又は配列番号6に記載のアミノ酸配列からなるポリペプチド、
(e)配列番号3又は配列番号6に記載のアミノ酸配列において1若しくは数個のアミノ酸が置換、欠失、及び/又は付加されたアミノ酸配列からなり、かつ、膵臓β細胞増加促進作用を持つポリペプチド、
(f)前記(d)のポリペプチドのフラグメント又は前記(e)のポリペプチドのフラグメントであって、配列番号10、配列番号11、又は配列番号12に記載のアミノ酸配列を少なくとも含み、かつ、膵臓β細胞増加促進作用を持つフラグメント。 - 配列番号6に記載のアミノ酸配列において1若しくは数個のアミノ酸が置換、欠失、及び/又は付加されたアミノ酸配列からなり、かつ、膵臓β細胞増加促進作用を持つポリペプチドが、配列番号9に記載のアミノ酸配列からなるポリペプチドである、請求項3記載の膵臓β細胞増加促進剤。
- 配列番号3に記載のアミノ酸配列からなるポリペプチド、配列番号6に記載のアミノ酸配列からなるポリペプチド、配列番号9に記載のアミノ酸配列からなるポリペプチド、配列番号10に記載のアミノ酸配列を少なくとも含むポリペプチド、配列番号11に記載のアミノ酸配列を少なくとも含むポリペプチド、配列番号12に記載のアミノ酸配列を少なくとも含むポリペプチド、の少なくとも1つを有効成分として含有する膵臓β細胞増加促進組成物。
- 遺伝子治療により膵臓β細胞の増加を促進するためのウイルスベクターを含む膵臓β細胞増加促進剤であって、
前記ウイルスベクターが、外来遺伝子の発現が可能なウイルスベクターに外来遺伝子として配列番号1、配列番号4、配列番号7の少なくとも1つに記載の塩基配列からなるDNA、又はこれらのDNAと90%以上の相同性を有し、かつ、膵臓β細胞増加促進作用を持つポリペプチドをコードするDNAを組み込んでなるものである膵臓β細胞増加促進剤。 - 前記ウイルスベクターがアデノウイルスベクターである請求項6記載の膵臓β細胞増加促進剤。
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