Neuromodulation of Hippocampal-Prefrontal Cortical Synaptic Plasticity and Functional Connectivity: Implications for Neuropsychiatric Disorders.
Rafael N. Ruggiero,Matheus Teixeira Rossignoli,Danilo Benette Marques,Bruno Monteiro de Sousa,Rodrigo Neves Romcy-Pereira,Cleiton Lopes-Aguiar,João Pereira Leite +6 more
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TLDR
In this article, the effects of neuromodulation on HPC-PFC neuronal dynamics from cellular to behavioral levels are not fully understood, and the implications of HPCPFC disruption in synaptic plasticity and functional connectivity on cognition and neuropsychiatric disorders are discussed.Abstract:
The hippocampus-prefrontal cortex (HPC-PFC) pathway plays a fundamental role in executive and emotional functions. Neurophysiological studies have begun to unveil the dynamics of HPC-PFC interaction in both immediate demands and long-term adaptations. Disruptions in HPC-PFC functional connectivity can contribute to neuropsychiatric symptoms observed in mental illnesses and neurological conditions, such as schizophrenia, depression, anxiety disorders, and Alzheimer's disease. Given the role in functional and dysfunctional physiology, it is crucial to understand the mechanisms that modulate the dynamics of HPC-PFC communication. Two of the main mechanisms that regulate HPC-PFC interactions are synaptic plasticity and modulatory neurotransmission. Synaptic plasticity can be investigated inducing long-term potentiation or long-term depression, while spontaneous functional connectivity can be inferred by statistical dependencies between the local field potentials of both regions. In turn, several neurotransmitters, such as acetylcholine, dopamine, serotonin, noradrenaline, and endocannabinoids, can regulate the fine-tuning of HPC-PFC connectivity. Despite experimental evidence, the effects of neuromodulation on HPC-PFC neuronal dynamics from cellular to behavioral levels are not fully understood. The current literature lacks a review that focuses on the main neurotransmitter interactions with HPC-PFC activity. Here we reviewed studies showing the effects of the main neurotransmitter systems in long- and short-term HPC-PFC synaptic plasticity. We also looked for the neuromodulatory effects on HPC-PFC oscillatory coordination. Finally, we review the implications of HPC-PFC disruption in synaptic plasticity and functional connectivity on cognition and neuropsychiatric disorders. The comprehensive overview of these impairments could help better understand the role of neuromodulation in HPC-PFC communication and generate insights into the etiology and physiopathology of clinical conditions.read more
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Compulsive-like behaviors in Aβ1-42 induced Alzheimer’s disease in mice are associated with hippocampo-cortical neural circuit dysfunction
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Journal ArticleDOI
International Union of Pharmacology. XXVII. Classification of Cannabinoid Receptors
Allyn C. Howlett,Francis Barth,Tom I. Bonner,Guy A. Cabral,Pierre Casellas,William A. Devane,Christian C. Felder,Miles Herkenham,Ken Mackie,Billy R. Martin,Raphael Mechoulam,Roger G. Pertwee +11 more
TL;DR: It is considered premature to rename cannabinoid receptors after an endogenous agonist as is recommended by the International Union of Pharmacology Committee on Receptor Nomenclature and Drug Classification, because pharmacological evidence for the existence of additional types of cannabinoid receptor is emerging and other kinds of supporting evidence are still lacking.
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