Lna oligonucleotides and the treatment of cancer

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/11 (2006.01) A61K 31/7088 (2006.01) A61P 35/00 (2006.01)

Patent

CA 2586701

The present disclosure concerns LNA oligonucleotides having a (sub)sequence of the general formula 5'- ( Me Cx )(Tx,) Me CXAs Astscscsastsgsgs MeCXAX (G x) (c)-3',and preferably of the general formula 5'- Me C XTX), MeCXAsastscscsastsgsgs Me CxAx G x c-3', wherein capital letters designate an LNA nucleotide analogue selected from .beta. -D-oxy-LNA, .beta. -D-thio-LNA, .beta.-D-amino-LNA and a-L-oxy-LNA, small letters designate a deoxynucleotide, and underline designates either an LNA nucleotide analogue as defined above or a deoxynucleotide. Such LNA oligonucleotides exhibit surprisingly good properties with respect to inhibition of the expression of Survivin by means of an anti-sense mechanism, and thereby lead to reduction or inhibition of tumour development in vivo. The LNA oligonucleotides are superior to other LNA oligonucletides targeting Surviving mRNA measured by functional read outs such as apoptosis induction and proliferation inhibition, and is potent in down- regulating Survivin mRNA and protein in transfected cancer cell lines, and induce apoptosis in combination with Taxol superior compared to other LNA oligonucleotides.

L'invention se rapporte à des oligonucléotides LNA possédant une (sous)séquence représentée par la formule 5'- (Me Cx)(Tx,) MeCXAs Astscscsastsgsgs MeCXAX(Gx)(c)-3', et de préférence la formule5'- MeCu>XTX), MeCXAsastscscsastsgsgs Me CxAx G x c-3', les lettres capitales représentant un analogue de nucléotide LNA choisi parmi ß -D-oxy-LNA, ß -D-thio-LNA, ß-D-amino-LNA et a-L-oxy-LNA, les lettres minuscules représentant un déoxynucléotide, and les lettres soulignées représentant soit un analogue de nucléotide LNA tel que défini ci-dessus ou un déoxynucléotide. Ces oligonucléotides LNA possèdent des propriétés étonnamment efficaces en ce qui concerne l'inhibition de l'expression de survivine au moyen d'un mécanisme antisens, ce qui entraîne ainsi la réduction et l'inhibition du développement de la tumeur in vivo. Les oligonucléotides LNA sont meilleurs que d'autres oligonucléotides qui ciblent l'ARNm de survivine mesuré par des affichages fonctionnels tels que l'induction d'apoptose et l'inhibition de la prolifération, et peuvent sous-réguler l'ARNm et la protéine de survivine dans des lignes cellulaires de cancer transfectées, et induisent l'apoptose en combinaison avec Taxol qui est meilleur que d'autres oligonucléotides de LNA.

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