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Objective   To investigate the effect of manual acupuncture (MA) on NLRP3 inflammasome-related proteins.Methods   SAMP8 mice were randomly divided into Alzheimer's disease (AD) group, the MA group, and the medicine (M) group. Mice in the M group were treated with donepezil hydrochloride at 0.65  μ g/g. In the MA group, MA was applied on Baihui (GV20) and Yintang (GV29) for 20 min and then pricked at Shuigou (GV26). The Morris water maze was applied to assess spatial learning and memory. Immunohistochemical staining and western blot analysis were used to observe the expression of NLRP3 inflammasome-related proteins.Results  Compared with the normal (N) control group, spatial learning and the memory capabilities of the AD group significantly decreased ( p  < 0.01). The number of NLRP3, ASC, Caspase-1, and IL-1 β  positively stained cells in the AD group was higher than the N group, and the relative expression levels of the above proteins were significantly higher than those in the N group ( p  < 0.01). These changes were reversed by both MA and donepezil ( p  < 0.01).Conclusion   MA can improve the learning and memory capabilities of SAMP8 mice. The negative regulation of the NLRP3/Caspase-1 pathway in the hippocampus may be a possible mechanism of MA in the treatment of AD.

Manual Acupuncture Suppresses the Expression of Proinflammatory Proteins Associated with the NLRP3 Inflammasome in the Hippocampus of SAMP8 Mice