Using Aβ42 mice, the results showed that the level of IL-17 was increased in Aβ42 model mice, and IL-17Ab could ameliorate Aβ-induced neurotoxicity and cognitive decline in C57BL/6 mice by downregulating the TRAF6/NF-κB pathway (Fig. 6). This evidence concerns the gene TRAF6 and Mental deterioration.