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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Lithium modulates the muscarinic facilitation of synaptic plasticity and theta-gamma coupling in the hippocampal-prefrontal pathway

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Ruggiero, Rafael N. [1] ; Rossignoli, Matheus T. [1] ; Lopes-Aguiar, Cleiton [1, 2] ; Leite, Joao P. [1] ; Bueno-Junior, Lezio S. [1] ; Romcy-Pereira, Rodrigo N. [3]
Total Authors: 6
[1] Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Neurosci & Behav Sci, BR-14049900 Ribeirao Preto, SP - Brazil
[2] Univ Fed Minas Gerais, Inst Biol Sci, Dept Physiol & Biophys, Nucleo Neurociencias, BR-31270901 Belo Horizonte, MG - Brazil
[3] Univ Fed Rio Grande do Norte, Brain Inst, Ave Nascimento de Castro 2155, BR-59056450 Natal, RN - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Experimental Neurology; v. 304, p. 90-101, JUN 2018.
Web of Science Citations: 1

Mood disorders are associated to functional unbalance in mesolimbic and frontal cortical circuits. As a commonly used mood stabilizer, lithium acts through multiple biochemical pathways, including those activated by muscarinic cholinergic receptors crucial for hippocampal-prefrontal communication. Therefore, here we investigated the effects of lithium on prefrontal cortex responses under cholinergic drive. Lithium-treated rats were anesthetized with urethane and implanted with a ventricular cannula for muscarinic activation, a recording electrode in the medial prefrontal cortex (mPFC), and a stimulating electrode in the intermediate hippocampal CA1. Either of two forms of synaptic plasticity, long-term potentiation (LTP) or depression (LTD), were induced during pilocarpine effects, which were monitored in real time through local field potentials. We found that lithium attenuates the muscarinic potentiation of cortical LIP (<20 min) but enhances the muscarinic potentiation of LTD maintenance (>80 min). Moreover, lithium treatment promoted significant cross-frequency coupling between CA1 theta (3-5 Hz) and mPFC low-gamma (30-55 Hz) oscillations. Interestingly, lithium by itself did not affect any of these measures. Thus, lithium pretreatment and muscarinic activation synergistically modulate the hippocampal-prefrontal connectivity. Because these alterations varied with time, oscillatory parameters, and type of synaptic plasticity, our study suggests that lithium influences prefrontal-related circuits through intricate dynamics, informing future experiments on mood disorders. (AU)

FAPESP's process: 05/56447-7 - Research through images from high field magnetic resonance aimed at studies in humans
Grantee:João Pereira Leite
Support type: Inter-institutional Cooperation in Support of Brain Research (CINAPCE) - Thematic Grants
FAPESP's process: 16/17882-4 - Drug-resistant epilepsies: diagnostic challenges, associated comorbidities and new experimental approaches
Grantee:João Pereira Leite
Support type: Research Projects - Thematic Grants