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Type: Artigo de Periódico
Title: Day-restricted Feeding During Pregnancy And Lactation Programs Glucose Intolerance And Impaired Insulin Secretion In Male Rat Offspring
Author: Faria
JD; de Araujo
TMF; Mancuso
RI; Meulman
J; Ferreira
DD; Batista
TM; Vettorazzi
JF; da Silva
PMR; Rodrigues
SC; Kinote
A; Carneiro
EM; Bordin
S; Anhe
Abstract: AimThe maternal environment during pregnancy and lactation plays a determining role in programming energy metabolism in offspring. Among a myriad of maternal factors, disruptions in the light/dark cycle during pregnancy can program glucose intolerance in offspring. Out-of-phase feeding has recently been reported to influence metabolism in adult humans and rodents; however, it is not known whether this environmental factor impacts offspring metabolism when applied during pregnancy and lactation. This study aims to determine whether maternal day-restricted feeding (DF) influences energy metabolism in offspring. MethodsPregnant and lactating Wistar rats were subjected to adlibitum (AL) or DF during pregnancy and lactation. The offspring born to the AL and DF dams were intra- and interfostered, which resulted in 4 group types. ResultsThe male offspring born to and breastfed by the DF dams (DF/DF off) were glucose intolerant, but without parallel insulin resistance as adults. Experiments with isolated pancreatic islets demonstrated that the male DF/DF off rats had reduced insulin secretion with no parallel disruption in calcium handling. However, this reduction in insulin secretion was accompanied by increased miRNA-29a and miRNA34a expression and decreased syntaxin 1a protein levels. ConclusionWe conclude that out-of-phase feeding during pregnancy and lactation can lead to glucose intolerance in male offspring, which is caused by a disruption in insulin secretion capacity. This metabolic programming is possibly caused by mechanisms dependent on miRNA modulation of syntaxin 1a.
Subject: Lactation
Metabolic Programming
Out-of-phase Feeding
Citation: Acta Physiologica. WILEY-BLACKWELL, n. 217, n. 3, p. 240 - 253.
Rights: fechado
Identifier DOI: 10.1111/apha.12684
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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