ABSTRACT
The aim of this study was to analyse the expression of genes related to the regulation of energy metabolism in skeletal muscle tissue by comparing male offspring in two age groups [at 110 and 245 postnatal days (pnd)] from a mother with obesity induced by a high-fat diet and (-)-epicatechin (Epi) administration. Four groups of six male offspring from different litters were randomly selected for the control groups [C and offspring of mothers with maternal obesity (MO)] or Epi intervention groups. We evaluated the effect of Epi on gastrocnemius tissue by analysing the mRNA and protein expression levels of Fndc5/irisin, Pgc-1α, Ucp3, and Sln. Epi significantly increased the Pgc-1α protein in the MO group of offspring at 110 pnd (p < 0.036, MO vs. MO+Epi), while at 245 pnd, Epi increased Fndc5/irisin mRNA expression in the MO+Epi group versus the MO group (p = 0.006).No differences were detected in Fndc5/irisin, Ucp3 or Sln mRNA or protein levels (including Pgc-1α mRNA) in the offspring at 110 pnd or in Pgc-1α, Ucp3, or Sln mRNA or protein levels (including Fndc5/irisin protein) at 245 pnd among the experimental groups. In conclusion, (-)-epicatechin treatment increased Fndc5/irisin mRNA expression and Pgc-α protein levels in the gastrocnemius muscle of offspring at postnatal days 110 and 245. Furthermore, it is suggested that the flavonoid effect in a model of obesity and its impact on thermogenesis in skeletal muscle are regulated by a different pathway than Fndc5/irisin.
Subject(s)
Catechin , Obesity, Maternal , Humans , Pregnancy , Rats , Male , Female , Animals , Catechin/pharmacology , Fibronectins/genetics , Fibronectins/metabolism , Fibronectins/pharmacology , Muscle, Skeletal/metabolism , Transcription Factors/genetics , Transcription Factors/metabolism , Transcription Factors/pharmacology , Obesity/drug therapy , Obesity/metabolism , Obesity, Maternal/metabolism , RNA, Messenger/geneticsABSTRACT
Maternal obesity has been described as a clinical entity associated with an increased incidence of metabolic diseases in the offspring, indicating a fetal programming phenomenon during this critical development period. Fetal exposure to an obesogenic environment affects multiple organs and tissues, including skeletal muscle, which is particularly susceptible to stressors from the external environment. Several studies have described alterations in the morphology and composition of skeletal muscle tissue secondary to obesogenic exposure in utero. In addition, modifications in signaling pathways related to the metabolism of energy substrates have been found in children born to mothers with obesity during pregnancy. This review addresses the current evidence describing the consequences of fetal exposure to an obesogenic maternal diet on skeletal muscle tissue, focusing on changes in tissue composition, alterations in signaling pathways related to glucose and fatty acid metabolism, mitochondrial biogenesis, and oxidative phosphorylation.
La obesidad materna se ha descrito como una entidad clínica asociada con el aumento en la incidencia de enfermedades metabólicas en el producto de la gestación, lo que indica la existencia de un fenómeno de programación fetal que se lleva a cabo durante este periodo crítico del desarrollo. La exposición del feto a un ambiente obesogénico afecta múltiples órganos y tejidos, incluyendo el músculo esquelético, el cual es particularmente susceptible a estresores del ambiente externo. Diversos estudios han descrito alteraciones en la morfología y composición del tejido muscular esquelético secundarias a una exposición obesogénica in utero. Además, se han encontrado modificaciones en vías de señalización relacionadas al metabolismo de sustratos energéticos en los productos de madres con obesidad durante la gestación. En la presente revisión se aborda la evidencia actual que describe las consecuencias de la exposición fetal a una dieta materna obesogénica sobre el tejido muscular esquelético, con especial enfoque en los cambios en la composición del tejido, las alteraciones en las vías de señalización relacionadas con el metabolismo de la glucosa y los ácidos grasos, así como la biogénesis mitocondrial y la fosforilación oxidativa.
Subject(s)
Obesity, Maternal , Child , Pregnancy , Female , Humans , Muscle, Skeletal , Fetal Development , Glucose/metabolism , Fatty Acids/metabolismABSTRACT
Abstract Maternal obesity has been described as a clinical entity associated with an increased incidence of metabolic diseases in the offspring, indicating a fetal programming phenomenon during this critical development period. Fetal exposure to an obesogenic environment affects multiple organs and tissues, including skeletal muscle, which is particularly susceptible to stressors from the external environment. Several studies have described alterations in the morphology and composition of skeletal muscle tissue secondary to obesogenic exposure in utero. In addition, modifications in signaling pathways related to the metabolism of energy substrates have been found in children born to mothers with obesity during pregnancy. This review addresses the current evidence describing the consequences of fetal exposure to an obesogenic maternal diet on skeletal muscle tissue, focusing on changes in tissue composition, alterations in signaling pathways related to glucose and fatty acid metabolism, mitochondrial biogenesis, and oxidative phosphorylation.
Resumen La obesidad materna se ha descrito como una entidad clínica asociada con el aumento en la incidencia de enfermedades metabólicas en el producto de la gestación, lo que indica la existencia de un fenómeno de programación fetal que se lleva a cabo durante este periodo crítico del desarrollo. La exposición del feto a un ambiente obesogénico afecta múltiples órganos y tejidos, incluyendo el músculo esquelético, el cual es particularmente susceptible a estresores del ambiente externo. Diversos estudios han descrito alteraciones en la morfología y composición del tejido muscular esquelético secundarias a una exposición obesogénica in utero. Además, se han encontrado modificaciones en vías de señalización relacionadas al metabolismo de sustratos energéticos en los productos de madres con obesidad durante la gestación. En la presente revisión se aborda la evidencia actual que describe las consecuencias de la exposición fetal a una dieta materna obesogénica sobre el tejido muscular esquelético, con especial enfoque en los cambios en la composición del tejido, las alteraciones en las vías de señalización relacionadas con el metabolismo de la glucosa y los ácidos grasos, así como la biogénesis mitocondrial y la fosforilación oxidativa.
