Silencing of polo-like kinase expression using interfering rna

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/11 (2006.01) A61K 9/00 (2006.01) A61K 31/7105 (2006.01) A61K 31/712 (2006.01) A61K 31/713 (2006.01) A61K 47/24 (2006.01) A61K 47/28 (2006.01) A61K 48/00 (2006.01) A61P 35/00 (2006.01) C07H 21/02 (2006.01) C12N 9/12 (2006.01) C12N 15/10 (2006.01) C12N 15/54 (2006.01) C12N 15/87 (2006.01) C12N 15/88 (2006.01)

Patent

CA 2710713

The present invention provides compositions comprising interfering RNA (e.g., siRNA, aiRNA, miRNA) that target polo-like kinase 1(PLK-1) expression and methods of using such compositions to silence PLK-1 expression. More particularly, the present invention provides unmodified and chemically modified interfering RNA molecules which silence PLK-1 expression and methods of use thereof. The present invention also provides serum-stable nucleic acid-lipid particles (e.g., SNALP) comprising an interfering RNA molecule described herein, a cationic lipid, and a non- cationic lipid, which can further comprise a conjugated lipid that inhibits aggregation of particles. The present invention further provides methods of silencing PLK-1 gene expression by administering an interfering RNA molecule described herein to a mammalian subject. The present invention additionally provides methods of identifying and/or modifying PLK-1 interfering RNA having immunostimulatory properties. Methods for sensitizing a cell such as a cancer cell to the effects of a chemotherapy drug comprising sequentially delivering PLK-1 interfering RNA followed by the chemotherapy drug are also provided.

La présente invention concerne des compositions comprenant un ARN interférent (par exemple, ARNsi, ARNai, ARNmi) qui ciblent l'expression de la polo-like kinase 1 (PLK-1) et des méthodes permettant d'utiliser de telles compositions pour silencer l'expression de la PLK-1. Plus particulièrement, la présente invention concerne des molécules d'ARN non modifiées et modifiées chimiquement qui silencent l'expression de la PLK-1 et leurs méthodes d'utilisation. La présente invention concerne également des particules d'acide nucléique-lipide stables dans le sérum (par exemple, SNALP) comprenant une molécule d'ARN interférent décrite ici, un lipide cationique et un lipide non cationique, lesdites particules pouvant comprendre en outre un lipide conjugué qui inhibe l'agrégation des particules. La présente invention concerne en outre des méthodes de silençage de l'expression du gène de la PLK-1 par l'administration d'une molécule d'ARN interférent décrite ici à un sujet mammifère. La présente invention concerne de plus des méthodes d'identification et/ou de modification de l'ARN interférent ciblant la PLK-1 ayant des propriétés immunostimulatrices. L'invention concerne également des méthodes de sensibilisation d'une cellule telle qu'une cellule cancéreuse aux effets d'un médicament de chimiothérapie comprenant l'administration séquentielle d'un ARN interférent ciblant la PLK-1 puis du médicament de chimiothérapie.

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