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Title: NMDA and AMPA/Kainate Glutamatergic Receptors in the Prelimbic Medial Prefrontal Cortex Modulate the Elaborated Defensive Behavior and Innate Fear-Induced Antinociception Elicited by GABA(A) Receptor Blockade in the Medial Hypothalamus
Authors: Freitas, Renato Leonardo de
Salgado-Rohner, Carlos Jose
Biagioni, Audrey Francisco
Medeiros, Priscila [UNIFESP]
Cecilio Hallak, Jaime Eduardo
Crippa, Jose Alexandre S.
Coimbra, Norberto Cysne
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Univ Fed Rio Grande do Sul
Keywords: amino-3-hydroxy-5-methyl-isoxazole-4-proprionate
kainate receptors
gamma-aminobutyric acid-A receptors
dorsomedial hypothalamus
innate fear-induced antinociception
N-methyl-d-aspartate receptors
panic-like behavior
prelimbic medial prefrontal cortex
Issue Date: 1-Jun-2014
Publisher: Oxford Univ Press Inc
Citation: Cerebral Cortex. Cary: Oxford Univ Press Inc, v. 24, n. 6, p. 1518-1528, 2014.
Abstract: The aim of the present study was to investigate the involvement of N-methyl-d-aspartate (NMDA) and amino-3-hydroxy-5-methyl-isoxazole-4-proprionate (AMPA)/kainate receptors of the prelimbic (PL) division of the medial prefrontal cortex (MPFC) on the panic attack-like reactions evoked by gamma-aminobutyric acid-A receptor blockade in the medial hypothalamus (MH). Rats were pretreated with NaCl 0.9%, LY235959 (NMDA receptor antagonist), and NBQX (AMPA/kainate receptor antagonist) in the PL at 3 different concentrations. Ten minutes later, the MH was treated with bicuculline, and the defensive responses were recorded for 10 min. the antagonism of NMDA receptors in the PL decreased the frequency and duration of all defensive behaviors evoked by the stimulation of the MH and reduced the innate fear-induced antinociception. However, the pretreatment of the PL cortex with NBQX was able to decrease only part of defensive responses and innate fear-induced antinociception. the present findings suggest that the NMDA-glutamatergic system of the PL is critically involved in panic-like responses and innate fear-induced antinociception and those AMPA/kainate receptors are also recruited during the elaboration of fear-induced antinociception and in panic attack-related response. the activation of the glutamatergic neurotransmission of PL division of the MPFC during the elaboration of oriented behavioral reactions elicited by the chemical stimulation of the MH recruits mainly NMDA receptors in comparison with AMPA/kainate receptors.
ISSN: 1047-3211
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