JP2021112174A - 腫瘍細胞の生存を低下させるdffaアンチセンスオリゴヌクレオチド及びその用途 - Google Patents
腫瘍細胞の生存を低下させるdffaアンチセンスオリゴヌクレオチド及びその用途 Download PDFInfo
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Abstract
Description
しかしながら、DFFAに対するASOを用いた先行研究は見当たらない。
本発明者は、これらの知見に基づいてさらに研究を重ねた結果、本発明を完成するに至った。
[1]DFFA遺伝子の発現を阻害する一本鎖オリゴヌクレオチドであって、
配列番号1で表されるヌクレオチド配列からなる、DFFAをコードする核酸における41〜90番目及び121〜160番目のヌクレオチド配列からなる群より選択されるいずれかのヌクレオチド配列からなる標的領域中の、連続する10個以上のヌクレオチドからなる配列と相補的なヌクレオチド配列を含む、一本鎖オリゴヌクレオチド。
[2]前記標的領域が、配列番号1で表されるヌクレオチド配列における41〜70番目、61〜90番目及び121〜150番目のヌクレオチド配列からなる群より選択されるいずれかのヌクレオチド配列と、その近傍のヌクレオチド配列とからなる、[1]記載の一本鎖オリゴヌクレオチド。
[3]ヌクレオチド長が10〜35ヌクレオチドである、[1]又は[2]に記載のアンチセンスオリゴヌクレオチド。
[4]ヌクレオチド長が30ヌクレオチドである、[3]に記載のアンチセンスオリゴヌクレオチド。
[5]配列番号6、8及び14からなる群より選択されるいずれかの配列番号で表されるヌクレオチド配列からなる、[4]に記載の一本鎖オリゴヌクレオチド。
[6][1]〜[5]のいずれかに記載の一本鎖オリゴヌクレオチドを含有してなる、DFFA遺伝子の発現阻害剤。
[7]異常細胞の生存を低下させる、[6]に記載の剤。
[8]がんの治療及び/又は予防用である、[6]又は[7]に記載の剤。
本発明はDFFA遺伝子の発現を阻害する活性を有するアンチセンスオリゴヌクレオチド(ASO)(以下、「本発明のASO」ともいう。)を提供する。ここで「アンチセンスオリゴヌクレオチド(ASO)」とは、標的となる核酸中の連続する10個以上のヌクレオチドからなる配列と特異的にハイブリダイズする一本鎖オリゴヌクレオチドを意味する。
また、「DFFA遺伝子の発現を阻害する」とは、結果として、ASOと細胞とを接触させた場合に、接触させない場合と比較して、DFFAタンパク質の発現量を低減させ、DFFAの活性を低下させる任意の態様を包含する意味で用いられ、例えば、RNase Hによる標的RNAの分解(例えば、ギャップマーによる)や、標的RNAとの特異的かつ安定したハイブリッド形成によるタンパク質合成阻害を含む。発現の阻害の程度は、統計学的に有意であれば特に制限されないが、例えば、細胞とASOとを接触させない場合と比較して、20%以上、好ましくは50%以上、より好ましくは75%以上、DFFA mRNA又はタンパク質の発現量を低下させた場合に、当該ASOはDFFA遺伝子の発現阻害活性を有するとみなすことができる。
CGAGAAGTCGCGGGAGGCCGGAGCGGCGGT(配列番号6)(標的配列:41-70)
TGCCCACCTTCGAGAAGTCGCGGGAGGCCG(配列番号7)(標的配列:51-80)
AGGTGGGACCTGCCCACCTTCGAGAAGTCG(配列番号8)(標的配列:61-90)
GAGTCCGGATCTCGCCAGATTCTGGTACCC(配列番号14)(標的配列:121-150)
CACGGCTTTAGAGTCCGGATCTCGCCAGAT(配列番号15)(標的配列:131-160)
(但し、tはuに置き換えてもよく、cは5-メチルシトシン(mC)に置き換えてもよい。)
より好ましくは、本発明のASOは、上記のいずれかのヌクレオチド配列からなる核酸である。
(1)5’末端に位置する5’ウイング領域;
(2)3’末端に位置する3’ウイング領域;及び
(3)領域(1)および領域(2)の間に位置するデオキシギャップ領域
を含む、ギャップマー型の核酸であり得る。ギャップマー型のASOとは、DNA(デオキシギャップ領域)と、その両側に、修飾や架橋が導入された核酸とを有する核酸(ウイング領域)であり、該DNA鎖を主鎖として、主鎖に相補的な標的RNAとヘテロ2本鎖核酸を形成し、標的RNAは、細胞に内在するRNase Hにより分解される。ウイング領域の構成ヌクレオチドはRNAであってもDNAであってもよい。
本発明のASOは、DFFA mRNAに特異的にハイブリダイズし、DFFA遺伝子の発現を阻害することができる。従って、本発明はまた、本発明のASOを含有してなるDFFA遺伝子の発現阻害剤を提供する。
医薬上許容される担体としては、例えば、ショ糖、デンプン等の賦形剤、セルロース、メチルセルロース等の結合剤、デンプン、カルボキシメチルセルロース等の崩壊剤、ステアリン酸マグネシウム、エアロジル等の滑剤、クエン酸、メントール等の芳香剤、安息香酸ナトリウム、亜硫酸水素ナトリウム等の保存剤、クエン酸、クエン酸ナトリウム等の安定剤、メチルセルロース、ポリビニルピロリド等の懸濁剤、界面活性剤等の分散剤、水、生理食塩水等の希釈剤、ベースワックス等が挙げられるが、それらに限定されるものではない。
本発明のASOは、顕著にDFFA発現阻害活性及び細胞生存抑制活性に優れているので、少ない投与量・投与回数で治療及び/又は予防効果を奏することができ、患者のQOL改善、医療費の削減、有害事象の発現抑制が可能となる。
Claims (8)
- DFFA遺伝子の発現を阻害する一本鎖オリゴヌクレオチドであって、
配列番号1で表されるヌクレオチド配列からなる、DFFAをコードする核酸における41〜90番目及び121〜160番目のヌクレオチド配列からなる群より選択されるいずれかのヌクレオチド配列からなる標的領域中の、連続する10個以上のヌクレオチドからなる配列と相補的なヌクレオチド配列を含む、一本鎖オリゴヌクレオチド。 - 前記標的領域が、配列番号1で表されるヌクレオチド配列における41〜70番目、61〜90番目及び121〜150番目のヌクレオチド配列からなる群より選択されるいずれかのヌクレオチド配列と、その近傍のヌクレオチド配列とからなる、請求項1に記載の一本鎖オリゴヌクレオチド。
- ヌクレオチド長が10〜35ヌクレオチドである、請求項1又は2に記載のアンチセンスオリゴヌクレオチド。
- ヌクレオチド長が30ヌクレオチドである、請求項3に記載のアンチセンスオリゴヌクレオチド。
- 配列番号6、8及び14からなる群より選択されるいずれかの配列番号で表されるヌクレオチド配列からなる、請求項4に記載の一本鎖オリゴヌクレオチド。
- 請求項1〜5のいずれか一項に記載の一本鎖オリゴヌクレオチドを含有してなる、DFFA遺伝子の発現阻害剤。
- 異常細胞の生存を低下させる、請求項6に記載の剤。
- がんの治療及び/又は予防用である、請求項6又は7に記載の剤。
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