At the end of the experiment, the mice were killed by eyeball blood sampling and cervical dislocation. After the animals were killed, the liver and brain were separated on ice immediately, and the excess tissue was removed for standby. The levels of serum, liver, and brain oxidative stress biomarkers (SOD, GSH-Px, MDA, PC) were determined by assay kits, according to the protocol provided by the manufacturer. The brain tissue homogenate of different groups was used to estimate the inflammatory parameters (TNF-α, IL-1β), cholinergic system related enzymes (AChE, ChAT) by assay, according to the protocol provided by the manufacturer.
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