Effects of acidic oligose on differentially expressed genes in the mice model of Alzheimer’s disease by microarray

AimTo investigate the molecular mechanism of protective effect of acidic oligose 971 on Alzheimer’s disease mouse model by using microarray. MethodsBalb/c mice were randomly divided into control group, β-AP_25-35 icv injected group and 971-treated group. The learning-memory ability of mice was tested by Morris water maze experiment. Total RNA of the cerebral cortex was extracted from the mice of each group. cDNA microarrays containing 1 176 genes were used to investigate the gene expression pattern of each group. Expressions of 5 genes were randomly selected for further confirmation by RT-PCR. ResultsIcv injection of β-AP_25-35 caused significant impairments in spatial and working memory performances of mice in Morris water maze and which were relieved by the treatment of 971. Up- and down- regulated genes were 19 and 12 in β-AP_25-35-injected group vs control group, respectively. Up- and down- regulated genes were 13 and 4, respectively, in 971-treated group vsβ-AP_25-35-injected group. RT-PCR results indicated that 5 genes showed identical results to that of the microarray. ConclusionThe protective effect of 971 on learning and memory ability of β-AP_{25-35-treated mouse may be related to the expression changes of genes involved in cell cycle, DNA repair, nerve growth, synaptic plasticity and immune response, etc.}