Energy balance and body fluid homeostasis control: from cells to the physiological systems

• Grant number: 14/15218-4
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: September 01, 2014
• End date: January 31, 2019
• Field of knowledge: Biological Sciences - Physiology - Physiology of Organs and Systems
• Principal Investigator: José Antunes Rodrigues
• Grantee: Tatiane Vilhena Franco
• Host Institution: Faculdade de Medicina de Ribeirão Preto (FMRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
• Associated research grant: 13/09799-1 - Energy balance and body fluid homeostasis control: from cells to the physiological systems, AP.TEM

Abstract

The hypothalamus is essential for the maintainance of extracellular volume and tonicity, as well as energy homeostasis. In this study we aim to clarify the involvement of neuronal and glial components in the integrative responses, as well as the participation of key neurotransmitters, neuromodulators, hormones and neuropeptides in the neuroendocrine control of both water and sodium intake and excretion and food intake. Considering that maternal nutritional and hormonal factors strongly affect fetal/neonatal programming, which affects metabolic function in adult life, this study also aims to evaluate the effects of saline overload during pregnancy and lactation and its repercussions to the integrity of neuroendocrine responses in adulthood. We will also investigate the participation of central mediators of appetite and peripheral factors such as insulin, leptin, ghrelin, adiponectin, glucocorticoids and estrogen in energy homeostasis using experimental models of bilateral adrenalectomy, ovariectomy and endotoxin tolerance. The peak of glucocorticoid secretion occurs in accordance with feedind pattern, with interplay between hypothalamic-pituitary-adrenal axis activity, central nervous system and nutritional status. The hypothalamus acts as a integrative center of circadian rhythm and also of glucocorticoid secretion and energy homeostasis, integrating neuroendocrine and behavioral responses. Thus, in the present study, we will evaluate the expression of genes related with circadian rhythm and its correlation with orexigenic and anorexigenic neuropeptides. We will also evaluate the ontogeny of clock genes and diurnal secretion of corticosterone in rats. Therefore, this proposal, using in vivo and in vitro experimental models, aims to assess in an integrative view, from molecules to systems, the physiological and pathophysiological control of energy homeostasis and fluid balance.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VILHENA-FRANCO, TATIANE; MECAWI, ANDRE SOUZA; ALMEIDA-PEREIRA, GISLAINE; LUCIO-OLIVEIRA, FABIANA; KAGOHARA ELIAS, LUCILA LEICO; ANTUNES-RODRIGUES, JOSE. Oestradiol acts through its beta receptor to increase vasopressin neuronal activation and secretion induced by dehydration. Journal of Neuroendocrinology, v. 31, n. 4, APR 2019. (14/15218-4)

VALENTIM-LIMA, EVANDRO; DE OLIVEIRA, JOSE ANTONIO CORTES; ANTUNES-RODRIGUES, JOSE.; REIS, LUIS CARLOS; GARCIA-CAIRASCO, NORBERTO; MECAWI, ANDRE S.. Neuroendocrine changes in the hypothalamic-neurohypophysial system in the Wistar audiogenic rat (WAR) strain submitted to audiogenic kindling. Journal of Neuroendocrinology, v. 33, n. 7, SI, JUL 2021. (19/05957-8, 14/50891-1, 14/15218-4, 13/09799-1)

DUTRA, V, SABRINA G.; PATERSON, ALEX; MONTEIRO, LIVIA R. N.; GREENWOOD, MICHAEL P.; GREENWOOD, MINGKWAN P.; AMARAL, LUDIMILA S.; MELO, MARIANA R.; COLOMBARI, DEBORA S. A.; COLOMBARI, EDUARDO; REIS, LUIS C.; et al. Physiological and Transcriptomic Changes in the Hypothalamic-Neurohypophysial System after 24 h of Furosemide-Induced Sodium Depletion. Neuroendocrinology, v. 111, n. 1-2, p. 70-86, DEC 2020. (14/15218-4, 13/23057-8, 13/09799-1, 19/08621-0)