Maternal melatonin programs the daily pattern of energy metabolism in adult offspring
Autor: | Silvana Bordin, Ana Paula L. Barbosa, Ariane O. Turati, Danilo da Silva Ferreira, Carolina Sollon, Juliana A. Faria, Fernanda Gaspar do Amaral, Laila Romagueira Bichara dos Santos, Camilo Lellis-Santos, Patrícia Rodrigues Lourenço Gomes, Caroline Costa Mesquita, José Cipolla-Neto, Gabriel Forato Anhê |
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Rok vydání: | 2012 |
Předmět: |
Anatomy and Physiology
medicine.medical_treatment Pineal gland Endocrinology Pregnancy Insulin Melatonin Glucose tolerance test Multidisciplinary medicine.diagnostic_test Pregnancy Outcome Neurochemistry Animal Models medicine.anatomical_structure Medicine Female Signal Transduction Research Article medicine.drug medicine.medical_specialty Offspring Science Pinealectomy Endocrine System Biology Model Organisms Insulin resistance Internal medicine medicine Animals Rats Wistar Diabetic Endocrinology Endocrine Physiology Insulin tolerance test Neuroendocrinology Glucose Tolerance Test Diabetes Mellitus Type 2 medicine.disease Rats FISIOLOGIA Rat Insulin Resistance Energy Metabolism Physiological Processes Chronobiology Neuroscience |
Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP PLoS ONE, Vol 7, Iss 6, p e38795 (2012) PLoS ONE |
Popis: | BackgroundShift work was recently described as a factor that increases the risk of Type 2 diabetes mellitus. In addition, rats born to mothers subjected to a phase shift throughout pregnancy are glucose intolerant. However, the mechanism by which a phase shift transmits metabolic information to the offspring has not been determined. Among several endocrine secretions, phase shifts in the light/dark cycle were described as altering the circadian profile of melatonin production by the pineal gland. The present study addresses the importance of maternal melatonin for the metabolic programming of the offspring.Methodology/principal findingsFemale Wistar rats were submitted to SHAM surgery or pinealectomy (PINX). The PINX rats were divided into two groups and received either melatonin (PM) or vehicle. The SHAM, the PINX vehicle and the PM females were housed with male Wistar rats. Rats were allowed to mate and after weaning, the male and female offspring were subjected to a glucose tolerance test (GTT), a pyruvate tolerance test (PTT) and an insulin tolerance test (ITT). Pancreatic islets were isolated for insulin secretion, and insulin signaling was assessed in the liver and in the skeletal muscle by western blots. We found that male and female rats born to PINX mothers display glucose intolerance at the end of the light phase of the light/dark cycle, but not at the beginning. We further demonstrate that impaired glucose-stimulated insulin secretion and hepatic insulin resistance are mechanisms that may contribute to glucose intolerance in the offspring of PINX mothers. The metabolic programming described here occurs due to an absence of maternal melatonin because the offspring born to PINX mothers treated with melatonin were not glucose intolerant.Conclusions/significanceThe present results support the novel concept that maternal melatonin is responsible for the programming of the daily pattern of energy metabolism in their offspring. |
Databáze: | OpenAIRE |
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