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Effect of AS IV on isoflurane-induced hippocampus neuron cell apoptosis. (A) Representative TUNEL staining of rat hippocampus tissues from different groups (magnification, ×40). (B) Numbers of TUNEL positive cells per area from hippocampus tissues of different groups. **P<0.01 vs. sham group; ##P<0.01 vs. AS IV (0 mg/kg). AS IV, astrogaloside IV.
