To examine whether the selected antisense oligodeoxynucleotides (AS-ODN) targeting against human brain acetylcholinesterase (AChE) mRNA could improve the cognitive deficit in the Alzheimer's disease (AD) model mice induced by amyloid-beta peptide (Abeta), we determined the time-effect relationship of AChE activity and the learning and memory after AS-ODN delivery. The results showed that the AChE activity decreased gradually along with time, initiating at 8 h and lasting 42 h. The time-effect curves of acetylcholine (ACh) behaved consistency with that of AChE activity. The animal cognition studies showed that in step-through test, the error number of the AS-ODN-treated AD model mice was significantly decreased, and the memory retention was increased. In the water maze performance, the swimming time obviously shortened. Our results indicated that antisense therapy is of potential use in the treatment of cognitive deficit in the Abeta model mice.
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