Antisense oligonucleotides, ribozymes and DNAzymes have emerged as novel, h
ighly selective inhibitors or modulators of gene expression. Indeed, their
use in the treatment of diseases arising from genetic abnormalities has bec
ome a real possibility over the past few years. The first antisense drug mo
lecule is now available for clinical use in Europe and USA. However, their
successful application in the clinic will require improvements in cellular
targeting and intracellular delivery. This review aims to look at recent ad
vances in the in vitro and in vivo delivery of antisense oligodeoxynucleoti
des and ribozymes. (C) 2000 Elsevier Science B.V. All rights reserved.