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Subtypes of muscarinic acetylcholine receptors involved in the persistent activity of layer V pyramidal neurons in the primary auditory cortex of young mice

JIA Hui-Juan, WANG Xin, FU Xin, DU Xiao-Feng, ZHENG Wei-Wei, LUO Feng^*

School of Life Sciences and Hubei Key Laboratory of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan 430079, China

Abstract

Cholinergic receptor activation and intracellular current injection lead to the persistent activity (PA), which may be involved in inducing neural plasticity. Our previous study showed that PA is closely related to the activation of muscarinic acetylcholine receptors (mAChRs) in pyramidal neurons of mouse primary auditory cortex (AI). However, the subtypes of mAChRs involved in PA remain unclear. Thus, using whole-cell patch-clamp recording and pharmacological methods, we investigated the role of different mAChR subtypes in inducing PA in AI layer V pyramidal neurons of young mice. The results showed that activation of mAChRs with intracellular depolarizing current induced PA in layer V pyramidal neurons. Blockade of M1, M2 or M3 subtypes prevented the PA, whereas M4 receptor antagonists did not affect the production of PA. The results suggest that the PA may be induced through a mechanism involving M1, M2 and M3 muscarinic receptors, but not M4 subtype.

Key words: whole-cell patch-clamp; mAChR; persistent activity; plasticity; mouse

Received: 2017-07-29　　Accepted: 2018-03-13

Corresponding author: 罗峰　　E-mail: fluocn@gmail.com

DOI: 10.13294/j.aps.2018.0021

Citing This Article：

JIA Hui-Juan, WANG Xin, FU Xin, DU Xiao-Feng, ZHENG Wei-Wei, LUO Feng. Subtypes of muscarinic acetylcholine receptors involved in the persistent activity of layer V pyramidal neurons in the primary auditory cortex of young mice. Acta Physiol Sin 2018; 70 (2): 123-131 (in Chinese with English abstract).