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Anxiety-like behavior and structural changes of the bed nucleus of the stria terminalis (BNST) in gestational protein-restricted male offspring

Texto completo
Torres, D. B. [1, 2] ; Lopes, A. [1, 2] ; Rodrigues, A. J. [3] ; Cerqueira, J. J. [3] ; Sousa, N. [3] ; Gontijo, J. A. R. [1, 2] ; Boer, P. A. [1, 2]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Dept Internal Med, Fetal Programming Lab, Fac Med Sci, Campinas, SP - Brazil
[2] Univ Estadual Campinas, Dept Internal Med, Hydroelectrolyte Metab Lab, Nucleus Med & Expt Surg, Fac Med Sci, Campinas, SP - Brazil
[3] Univ Minho, Life & Hlth Sci Res Inst, Sch Hlth Sci, Braga - Portugal
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Citações Web of Science: 0

Animal evidence has suggested that maternal emotional and nutritional stress during pregnancy is associated with behavioral outcomes in offspring. The nature of the stresses applied may differ, but it is often assumed that the mother's hippocampus-hypothalamic-pituitary-adrenal (HHPA) axis response releases higher levels of glucocorticoid hormones. The bed nucleus of the stria terminalis (BNST) is in a pivotal position to regulate the HHPA axis and the stress response, and it has been implicated in anxiety behavior. In the current study, to search whether BNST structural changes and neurochemical alterations are associated with anxiety-related behavior in adult gestational protein-restricted offspring relative to an age-matched normal protein diet (NP) rats, we conduct behavioral tests and, BNST dendritic tree analysis by Sholl analysis, associated to immunoblotting-protein quantification {[}11 beta-HSD2, GR, MR, AT1R, 5HT1A and 5HT2A, corticotrophin-releasing factor (CRH) and CRH1]. Dams were maintained either on isocaloric standard rodent chow {[}with NP content, 17% casein or low protein content (LP), 6% casein] chow throughout their entire pregnancy. Here, in rats subjected to gestational protein restriction, we found: (a) a significant reduction in dendritic length and impoverished dendritic arborization in BNST neurons; (b) an elevated plasmatic corticosterone levels; and (c) associated with enhanced anxiety-like behavior when compared with age-matched NP offspring. Moreover, altered protein (11 beta-HSD2, GR, MR and type 1 CRH receptors) expressions may underlie the increase in anxiety-like behavior in LP offspring. This work represents the first demonstration that BNST developmental plasticity by maternal protein restriction, resulting in fine structural changes and neurochemical alterations that are associated with modified behavioral states. (AU)

Processo FAPESP: 13/12486-5 - Programação fetal: sobre a ontogênese renal e neural
Beneficiário:Jose Antonio Rocha Gontijo
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 05/54362-4 - Biologia do desenvolvimento renal em modelo de restrição proteica durante a gestação em ratas
Beneficiário:Patrícia Aline Boer
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores