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Mice treated with MPTP/Pro demonstrated olfactory dysfunction. a Mice in the group injected with MPTP/Pro exhibited remarkable olfactory dysfunction compared with control mice in behavior testing. b The TH protein level was decreased in MPTP/Pro-treated mice. c Damaged neurons and mitochondria appeared in the olfactory bulb based on transmission electron microscopy (TEM) observation. All data are expressed as the mean ± SEM. #P < 0.05 compared with the control group
