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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

STAT5 signaling in kisspeptin cells regulates the timing of puberty

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Silveira, Marina Augusto ; Furigo, Isadora C. ; Zampieri, Thais T. ; Bohlen, Tabata M. ; de Paula, Daniella G. ; Franci, Celso Rodrigues ; Donato, Jr., Jose ; Frazao, Renata
Total Authors: 8
Document type: Journal article
Source: Molecular and Cellular Endocrinology; v. 448, n. C, p. 55-65, JUN 15 2017.
Web of Science Citations: 13

Previous studies have shown that kisspeptin neurons are important mediators of prolactin's effects on reproduction. However, the cellular mechanisms recruited by prolactin to affect kisspeptin neurons remain unknown. Using whole-cell patch-clamp recordings of brain slices from kisspeptin reporter mice, we observed that 20% of kisspeptin neurons in the anteroventral periventricular nucleus was indirectly depolarized by prolactin via an unknown population of prolactin responsive neurons. This effect required the phosphatidylinositol 3-kinase signaling pathway. No effects on the activity of arcuate kisspeptin neurons were observed, despite a high percentage (70%) of arcuate neurons expressing prolactin-induced STAT5 phosphorylation. To determine whether STAT5 expression in kisspeptin cells regulates reproduction, mice carrying Stat5a/b inactivation specifically in kisspeptin cells were generated. These mutants exhibited an early onset of estrous cyclicity, indicating that STAT5 transcription factors exert an inhibitory effect on the timing of puberty. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 15/20198-5 - Role of Leptin in puberal neuromodulation
Grantee:Thais Tessari Zampieri
Support Opportunities: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 12/12202-4 - Kiss1 neurons biophysical properties modulation by circadian factors
Grantee:Renata Frazão
Support Opportunities: Regular Research Grants
FAPESP's process: 15/10992-6 - Investigation of metabolic programming through different approaches
Grantee:Jose Donato Junior
Support Opportunities: Regular Research Grants
FAPESP's process: 13/07908-8 - Precocious puberty in childhood obesity: possible mechanisms and influence of leptin
Grantee:Renata Frazão
Support Opportunities: Regular Research Grants
FAPESP's process: 13/21722-4 - Mechanism of action of bromocriptine and prolactin antagonists in the treatment of Diabetes and Obesity
Grantee:Isadora Clivatti Furigo
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 15/14588-5 - Influence of leptin sensitivity in mice sexual maturation
Grantee:Tabata Mariz Bohlen
Support Opportunities: Scholarships in Brazil - Doctorate