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(A) mRNA expression of α7nAChR and Prx1; (B) protein expression of α7nAChR and Prx1; (C) apoptosis rate detected by TUNEL; and (D) phosphorylation of p38, JNK and ERK1/2. The values are expressed as mean; bars, ± SE. * P < 0.05; ** P < 0.01.
