Dietary sodium restriction alters muscle lipidomics that relates to insulin resistance in mice

Autor(es):Mostrar menos -

Pinto, Paula Ramos ^[1] ; Yoshinaga, Marcos Y. ^[2] ; Del Bianco, Vanessa ^[1] ; Bochi, Ana Paula ^[1] ; Ferreira, Guilherme S. ^[1] ; Pinto, Isabella F. D. ^[2] ; Rodrigues, Leticia G. ^[1] ; Nakandakare, Edna R. ^[1] ; Okamoto, Maristela M. ^[3] ; Machado, Ubiratan F. ^[3] ; Miyamoto, Sayuri ^[2] ; Catanozi, Sergio ^[1] ; Passarelli, Marisa ^{[4, 1]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Hosp Clin HCFMUSP, Fac Med, Lab Lipides LIM 10, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Quim, Dept Bioquim, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Inst Biomed Sci, Dept Physiol & Biophys, Sao Paulo - Brazil

^[4] Univ Nove Julho, Programa posgrad Med, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Biological Chemistry; v. 296, JAN-JUN 2021.
• Citações Web of Science: 1

Resumo

A low-sodium (LS) diet has been shown to reduce blood pressure (BP) and the incidence of cardiovascular diseases. However, severe dietary sodium restriction promotes insulin resistance (IR) and dyslipidemia in animal models and humans. Thus, further clarification of the long-term consequences of LS is needed. Here, we investigated the effects of chronic LS on gastrocnemius gene and protein expression and lipidomics and its association with IR and plasma lipids in LDL receptor knockout mice. Three-month-old male mice were fed a normal sodium diet (NS; 0.5% Na; n = 12-19) or LS (0.06% Na; n = 14-20) over 90 days. Body mass (BM), BP, plasma total cholesterol, triacylglycerol (TG), glucose, hematocrit, and IR were evaluated. LS increased BM (9%), plasma TG (51%), blood glucose (19%), and IR (46%) when compared with the NS. RT-qPCR analysis revealed that genes involved in lipid uptake and oxidation were increased by the LS: Fabp3 (106%), Prkaa1 (46%), and Cpt1 (74%). Genes and proteins (assessed by Western blotting) involved in insulin signaling were not changed by the LS. Similarly, lipid species classically involved in muscle IR, such as diacylglycerols and ceramides detected by ultra-high-performance liquid chromatography coupled to mass spectrometry, were also unchanged by LS. Species of phosphatidylcholines (68%), phosphatidylinositol (90%), and free fatty acids (59%) increased while cardiolipins (41%) and acylcarnitines (9%) decreased in gastrocnemius in response to LS and were associated with glucose disposal rate. Together these results suggest that chronic LS alters glycerophospholipid and fatty acids species in gastrocnemius that may contribute to glucose and lipid homeostasis derangements in mice. (AU)

• Processo FAPESP: 16/15603-0 - Desvendando mecanismos envolvidos no controle glicêmico e nas complicações crônicas do Diabetes mellitus: contribuições à saúde humana
• Beneficiário: Ubiratan Fabres Machado
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/07937-8 - Redoxoma
• Beneficiário: Ohara Augusto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 15/21072-5 - Influência do controle glicêmico ou do estágio da nefropatia sobre o transporte reverso de colesterol no Diabete melito: papel da memória metabólica induzida pela albumina modificada por glicação avançada
• Beneficiário: Marisa Passarelli
• Modalidade de apoio: Auxílio à Pesquisa - Regular