The invention relates to oligomer compounds (oligomers), which target beta-catenin mRNA in a cell, leading to reduced expression of beta-catenin. Reduction of beta-catenin expression is beneficial for a range of medical disorders, such as hyperproliferative disorders, such as cancers. The invention provides therapeutic compositions comprising oligomers and methods for modulating the expression of beta-catenin using said oligomers, including methods of treatment for hyperproliferative disorders including cancers such as multiple myeloma.