Antenatal corticosteroid therapy modulates hepatic AMPK phosphorylation and maternal lipid metabolism in early lactating rats

Autor(es):Mostrar menos -

Hecht, Fernanda Ballerini ^[1] ; Teixeira, Caio Jordao ^[2] ; de Souza, Dailson Nogueira ^[1] ; Nunes Mesquita, Filiphe de Paula ^[1] ; do Val Roso, Ryana Elyzabeth ^[3] ; Sodre, Frhancielly Shirley ^[2] ; Veronesi, Vanessa Barbosa ^[1] ; da Rocha, Deborah Fabiana ^[3] ; Dantas de Menezes, Yan Guida ^[3] ; Pioli, Mariana Rodrigues ^[1] ; Bordin, Silvana ^[2] ; Cecatti, Jose Guilherme ^[3] ; Luz, Adriana Gomes ^[3] ; Anhe, Gabriel Forato ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Med Sci, Dept Translat Med, Campinas, SP - Brazil

^[2] Univ Sao Paulo, Inst Biomed Sci, Dept Physiol & Biophys, Sao Paulo - Brazil

^[3] Univ Estadual Campinas, Sch Med Sci, Dept Obstet & Gynecol, Campinas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOMEDICINE & PHARMACOTHERAPY; v. 144, DEC 2021.
• Citações Web of Science: 0

Resumo

Antenatal corticosteroid therapy is used to reduce neonatal mortality in preterm infants but it is currently unknown whether this intervention affects lipid metabolism at the peripartum. This study aimed to evaluate if antenatal corticosteroid therapy in pregnant rats and women affects lipid metabolism during early lactation. We evaluated women at risk of preterm delivery that received corticosteroid therapy (CASE) and women that were not exposed to corticosteroid and were not at risk of preterm delivery (CONTROL). Samples were collected to measure serum and milk triacylglycerol (TAG) three days after delivery. Rats were treated with dexamethasone (DEX) between the 15th and the 20th days of pregnancy. Samples were collected at different days after delivery (L3, L8 and L14). TAG was measured in serum, liver and mammary gland (MG). TAG appearance rates were measured after tyloxapol injection and gavage with olive oil. We also evaluated the expression of key genes related to lipid metabolism in the liver and in the MG and hepatic phosphorylation of AMP-activated protein kinase (AMPK) and acetyl-CoA carboxylase (ACC). CASE volunteers delivered earlier than CONTROL but presented unaltered milk and serum TAG concentrations. Early lactating DEX rats exhibited increased TAG in serum, MG and milk. No changes in CD36 and LPL were detected in the MG and liver. Early lactating DEX rats displayed increased TAG appearance rate and reduced hepatic AMPK/ACC phosphorylation. Our data revealed that antenatal corticosteroid therapy reduces hepatic AMPK/ACC phosphorylation during early lactation that reflects in increased TAG concentration in serum, MG and milk. (AU)

• Processo FAPESP: 19/03196-0 - Mecanismos moleculares envolvidos na inflexibilidade metabólica de ratos submetidos à programação fetal por excesso de glicocorticoides
• Beneficiário: Silvana Auxiliadora Bordin da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/07607-8 - CMPO - Centro Multidisciplinar de Pesquisa em Obesidade e Doenças Associadas
• Beneficiário: Licio Augusto Velloso
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 20/09717-9 - Mecanismos moleculares envolvidos nas alterações cardiovasculares desencadeadas pelo excesso fetal de glicocorticoides
• Beneficiário: Frhancielly Shirley Souza Sodré
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/13138-9 - Efeito de agonistas de PPAR-gamma ou PPAR-alpha na programação metabólica decorrente de restrição calórica durante gestação e lactação
• Beneficiário: Vanessa Barbosa Veronesi
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 20/06397-3 - Investigação da senescência celular em roedores submetidos à Obesidade
• Beneficiário: Caio Jordão Teixeira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado