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. 2021 May 26;12:662148. doi: 10.3389/fphar.2021.662148

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Copyright © 2021 Wang, He, Xin, Zhang, Sun, Li, Ni, Zeng, Ma and Bai.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Levels of neurotransmitters in the hippocampus. Data are presented with the means ± standard deviation (n = 6). Bars with different letters are significantly different on the basis of Duncan’s multiple range test (P < 0.05). (A)–(F): Levels of DA, 5-HT, Ach, Glu, GABA and NO, respectively; (G)—(I): Activities of AchE, ChAT and NOS, respectively. DA, dopamine; 5-HT, 5-hydroxytryptamine; Ach, acetylcholine; Glu, glutamic acid; GABA, gamma-aminobutyric acid; NO, nitric oxide; AchE, acetyl-cholinesterase; ChAT, choline acetyltransferas; NOS, nitric oxide synthase.