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Evaluation of the potential of prolactin antagonists to the treatment of obesity and Diabetes mellitus 2

Grant number: 12/24345-4
Support type:Regular Research Grants
Duration: July 01, 2013 - June 30, 2015
Field of knowledge:Biological Sciences - Physiology
Principal Investigator:Carlos Roberto Jorge Soares
Grantee:Carlos Roberto Jorge Soares
Home Institution: Instituto de Pesquisas Energéticas e Nucleares (IPEN). Secretaria de Desenvolvimento Econômico (São Paulo - Estado). São Paulo , SP, Brazil
Assoc. researchers:João Ezequiel de Oliveira ; Jose Donato Junior ; Miriam Fussae Suzuki ; Paolo Bartolini

Abstract

Recently the entity Food and Drug Administration (FDA) approved the commercial use in the United States of bromocriptine mesylate (trade name Cycloset®) to improve glycemic control in adults with type 2 diabetes mellitus (T2DM). Cycloset® represents a new class of drugs to treat T2DM and acts as an agonist of dopamine D2 receptors. It is worth noting that many studies have also demonstrated that administration of bromocriptine causes a reduction in food intake and body weight. Notably, the mechanisms of action of bromocriptine to affect glucose homeostasis and energy balance are unknown. By acting as a dopamine agonist, bromocriptine may affect numerous physiological systems, broadening the spectrum of possible side effects. A relevant fact is that bromocriptine has been used for decades in the treatment of hyperprolactinemia. In addition to its classical effects on milk production, prolactin has numerous metabolic effects that have not yet been well studied. Several studies show that hyperprolactinemia increases the risk of metabolic diseases such as obesity and T2DM. These metabolic abnormalities are observed both in prolactinomas and during the use of antipsychotic drugs that antagonize dopamine D2 receptors. Thus, it is plausible to assume that prolactin exerts an important role in the modulation of glucose homeostasis and energy balance. Therefore, the overall objective of this proposal is to investigate the potential of prolactin antagonists for the treatment of obesity and T2DM. More specifically, this proposal will: 1) assess whether the beneficial effects of bromocriptine on metabolism are mediated by prolactin, 2) produce in mammalian cells (CHO) two types of hPRL antagonists (hPRL-G129R-and S179D hPRL) in sufficient quantities for in vivo testing, 3) assess whether the administration of such antagonists recapitulates the beneficial effects of bromocriptine in mouse models of obesity and diabetes. (AU)

Scientific publications (5)
(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)
FURIGO, ISADORA C.; SUZUKI, MIRIAM F.; OLIVEIRA, JOAO E.; RAMOS-LOBO, ANGELA M.; TEIXEIRA, PRYSCILA D. S.; PEDROSO, JOAO A.; DE ALENCAR, AMANDA; ZAMPIERI, THAIS T.; BUONFIGLIO, DANIELLA C.; QUARESMA, PAULA G. F.; PRADA, PATRICIA O.; BARTOLINI, PAOLO; SOARES, CARLOS R. J.; DONATO, JR., JOSE. Suppression of Prolactin Secretion Partially Explains the Antidiabetic Effect of Bromocriptine in ob/ob Mice. Endocrinology, v. 160, n. 1, p. 193-204, JAN 2019. Web of Science Citations: 0.
FURIGO, ISADORA C.; MELO, HELEN M.; LYRA E SILVA, NATALIA M.; RAMOS-LOBO, ANGELA M.; TEIXEIRA, PRYSCILA D. S.; BUONFIGLIO, DANIELLA C.; WASINSKI, FREDERICK; LIMA, ELIANA R.; HIGUTI, ELIZA; PERONI, CIBELE N.; BARTOLINI, PAOLO; SOARES, CARLOS R. J.; METZGER, MARTIN; DE FELICE, FERNANDA G.; DONATO, JR., JOSE. Brain STAT5 signaling modulates learning and memory formation. Brain Structure & Function, v. 223, n. 5, p. 2229-2241, JUN 2018. Web of Science Citations: 3.
DIAS, PAULO V. S.; ARTHUSO, FERNANDA S.; OLIVEIRA, JOAO E.; SUZUKI, MIRIAM F.; SOUSA, JOSE M.; RIBELA, MARIA TERESA C. P.; BARTOLINI, PAOLO; SOARES, CARLOS R. J. Determination of recombinant Interferon-alpha 2 in E. coil periplasmic extracts by reversed-phase high-performance liquid chromatography. JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES, v. 1072, p. 193-198, JAN 1 2018. Web of Science Citations: 0.
MENEZES, ANA C. S. C.; SUZUKI, MIRIAM F.; OLIVEIRA, JOAO E.; RIBELA, MARIA T. C. P.; FURIGO, ISADORA C.; DONATO, JR., JOSE; BARTOLINI, PAOLO; SOARES, CARLOS R. J. Expression, purification and characterization of the authentic form of human growth hormone receptor antagonist G120R-hGH obtained in Escherichia coli periplasmic space. Protein Expression and Purification, v. 131, p. 91-100, MAR 2017. Web of Science Citations: 4.
FURIGO, ISADORA C.; METZGER, MARTIN; TEIXEIRA, PRYSCILA D. S.; SOARES, CARLOS R. J.; DONATO, JR., JOSE. Distribution of growth hormone-responsive cells in the mouse brain. Brain Structure & Function, v. 222, n. 1, p. 341-363, JAN 2017. Web of Science Citations: 13.

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