Adolescence is a vulnerable period for the onset of several psychiatric disorders where the prefrontal cortex (PFC) is involved, yet, our mechanistic understanding of this susceptibility remains incipient due to insufficient knowledge of the normative changes occurring during this developmental stage. Thus, the long-term goal of this proposal is to identify key cell- and circuit-level processes underlying the normal development of the PFC in order to understand the adolescent vulnerability to the onset of psychiatric disorders where the PFC is compromised. Studies from our previous funding period reveal that the PFC undergoes massive functional remodeling in both glutamatergic and GABAergic transmission during adolescence. Nonetheless, it is the local GABAergic system that appears to render the PFC labile during adolescence to the extent that any insult occurring during this developmental period will prevent the normal functional acquisition of inhibitory control in the PFC through a gain of local GABAergic function. Interestingly, our data indicate this GABAergic facilitation is contemporaneous with two other developmentally-regulated PFC events occurring during adolescence: 1) a functional strengthening of the ventral hippocampus-to-PFC pathway, and 2) increased glutamatergic activity onto a subset of PFC GABAergic interneurons, suggesting these events are interrelated. Thus, the objective of this application is to determine whether there is a causal relationship between specific excitatory afferents and the acquisition of PFC inhibitory control through their effect in specific GABAergic populations. The central hypothesis is that the functional maturation of GABAergic transmission in the PFC is dependent upon the activation of specific prefrontal interneurons by specific afferents that drive PFC activity during adolescence, such as those from the ventral hippocampus and basolateral amygdala. We will test this hypothesis through the pursuit of 3 Specific Aims. We will first determine the contribution of input-specific afferent drive (Aim 1) and the role of specific prefrontal interneurons (Aim 2) in enabling the gain of GABAergic function in the PFC during adolescence.
Aim 3 will test if impaired GABAergic maturation in the PFC during adolescence can elicit enduring deficits in PFC-dependent behaviors as adults. All in all, the proposed research plan is innovative in our opinion because it will incorporate knowledge of the events occurring during adolescence to explain the acquisition of adult PFC faculties and development of PFC deficits, especially from the perspective of how prefrontal GABAergic maturation is regulated by afferent structures widely involved in normal and pathological neural responses. The proposed studies are significant because they will uncover key neurodevelopmental mechanisms that contribute to the acquisition of mature cognitive abilities in adults. Such knowledge is expected to have a positive impact in the development of age-specific interventions aimed at decreasing the incidence or ameliorating the symptoms of mental disorders within the adolescent/young adult population.

Public Health Relevance

The proposed research is directly relevant to public health because it will uncover key neurodevelopmentally-regulated synaptic mechanisms that enable the normal maturation of the prefrontal cortex during adolescence and the neurobiology that renders this developmental period susceptible for the onset of psychiatric disorders. This goal is directly aligned with the NIMH agenda by establishing a developmental framework in which mental disorders can be understood, specifically those arising during the adolescent to adult transition period. This knowledge is expected to fully serve NIH mission by devising the proper timing of intervention strategies to prevent or ameliorate the onset of mental disorders during critical periods.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Research Project (R01)
Project #
5R01MH086507-07
Application #
9220849
Study Section
Pathophysiological Basis of Mental Disorders and Addictions Study Section (PMDA)
Program Officer
Rossi, Andrew
Project Start
2010-07-01
Project End
2017-12-31
Budget Start
2017-01-01
Budget End
2017-12-31
Support Year
7
Fiscal Year
2017
Total Cost
Indirect Cost
Name
Rosalind Franklin University
Department
Pharmacology
Type
Schools of Medicine
DUNS #
069501252
City
North Chicago
State
IL
Country
United States
Zip Code
60064
Mininni, Camilo J; Caiafa, César F; Zanutto, B Silvano et al. (2018) Putative dopamine neurons in the ventral tegmental area enhance information coding in the prefrontal cortex. Sci Rep 8:11740
Toval, Angel; Baños, Raúl; De la Cruz, Ernesto et al. (2017) Habituation Training Improves Locomotor Performance in a Forced Running Wheel System in Rats. Front Behav Neurosci 11:42
Flores-Barrera, Eden; Thomases, Daniel R; Cass, Daryn K et al. (2017) Preferential Disruption of Prefrontal GABAergic Function by Nanomolar Concentrations of the ?7nACh Negative Modulator Kynurenic Acid. J Neurosci 37:7921-7929
Glasgow, Jaimee; Koshman, Yevgeniya; Samarel, Allen M et al. (2016) Myocardial infarction sensitizes medial prefrontal cortex to inhibitory effect of locus coeruleus stimulation in rats. Psychopharmacology (Berl) 233:2581-92
Caballero, Adriana; Tseng, Kuei Y (2016) GABAergic Function as a Limiting Factor for Prefrontal Maturation during Adolescence. Trends Neurosci 39:441-448
Caballero, Adriana; Granberg, Rachel; Tseng, Kuei Y (2016) Mechanisms contributing to prefrontal cortex maturation during adolescence. Neurosci Biobehav Rev 70:4-12
Lew, Sergio E; Tseng, Kuei Y (2014) Dopamine modulation of GABAergic function enables network stability and input selectivity for sustaining working memory in a computational model of the prefrontal cortex. Neuropsychopharmacology 39:3067-76
Thomases, Daniel R; Cass, Daryn K; Meyer, Jacqueline D et al. (2014) Early adolescent MK-801 exposure impairs the maturation of ventral hippocampal control of basolateral amygdala drive in the adult prefrontal cortex. J Neurosci 34:9059-66
Caballero, Adriana; Flores-Barrera, Eden; Cass, Daryn K et al. (2014) Differential regulation of parvalbumin and calretinin interneurons in the prefrontal cortex during adolescence. Brain Struct Funct 219:395-406
Cass, D K; Flores-Barrera, E; Thomases, D R et al. (2014) CB1 cannabinoid receptor stimulation during adolescence impairs the maturation of GABA function in the adult rat prefrontal cortex. Mol Psychiatry 19:536-43

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