Antisense and Antigene Inhibition of Gene Expression by Cell-Permeable Oligonucleotide鈥揙ligospermine Conjugates

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• 作者：Keith T. Gagnon ; Jonathan K. Watts ; Hannah M. Pendergraff ; Christophe Montaillier ; Danielle Thai ; Pierre Potier ; David R. Corey
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：June 8, 2011
• 年：2011
• 卷：133
• 期：22
• 页码：8404-8407
• 全文大小：795K
• 年卷期：v.133,no.22(June 8, 2011)
• ISSN：1520-5126

文摘

Oligonucleotides and their derivatives are a proven chemical strategy for modulating gene expression. However, their negative charge remains a challenge for delivery and target recognition inside cells. Here we show that oligonucleotide鈥搊ligospermine conjugates (Zip nucleic acids or ZNAs) can help overcome these shortcomings by serving as effective antisense and antigene agents. Conjugates containing DNA and locked nucleic acid (LNA) oligonucleotides are active, and oligospermine conjugation facilitates carrier-free cell uptake at nanomolar concentrations. Conjugates targeting the CAG triplet repeat within huntingtin (HTT) mRNA selectively inhibit expression of the mutant huntingtin protein. Conjugates targeting the promoter of the progesterone receptor (PR) function as antigene agents to block PR expression. These observations support further investigation of ZNA conjugates as gene silencing agents.