The effects of two types of Western diet on the induction of metabolic syndrome and cardiac remodeling in obese rats

Autor(es)

Vileigas, Danielle Fernandes ^[1] ; de Souza, Sergio Luiz Borges ^[1] ; Correa, Camila Renata ^[2] ; Silva, Carol Cristina Vagula de Almeida ^[1] ; de Campos, Dijon Henrique Salome ^[1] ; Padovani, Carlos Roberto ^[3] ; Cicogna, Antonio Carlos ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Botucatu Med Sch, Dept Internal Med, BR-18618687 Botucatu, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Botucatu Med Sch, Dept Patol, Botucatu, SP - Brazil

^[3] Sao Paulo State Univ UNESP, Inst Biosci, Dept Biostat, Botucatu, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF NUTRITIONAL BIOCHEMISTRY; v. 92, JUN 2021.
• Citações Web of Science: 0

Resumo

Metabolic syndrome (MetS) include obesity as a critical feature and is strongly associated with risk of cardiovascular disease (CVD). Insights into mechanisms involved in the pathophysiology of these clinical manifestations are essential for the development of therapeutic strategies. Thus, Western diets (WD) have been widely employed in diet-induced obesity (DIO) model. However, there are variations in fat and sugar proportions of such diets, making comparisons challenging. We aimed to assess the impact of two types of the WD on metabolic status and cardiac remodeling, to achieve a DIO model that better mimics the human pathogenesis of MetS-induced CVD. Male Wistar rats were distributed into three groups: control diet, Western diet fat (WDF), and Western diet sugar (WDS) for 41 weeks. Metabolic and inflammatory parameters and cardiac changes were characterized. WDF and WDS feeding promoted higher serum triglycerides, glucose intolerance, and insulin resistance, while just WDF presented inflammation in adipose tissue. WDF-fed rats showed increased catalase activity and malondialdehyde (MDA) and carbonyl protein levels, suggesting cardiac oxidative stress, while WDS-fed rats only raised MDA. Both WD equally elevated protein expressions involved in lipid metabolism, but only WDF downregulated the glycolysis pathway. Furthermore, the mechanical myocardial function was impaired in obese rats, being more relevant in WDF. In conclusion, both WD effectively triggered MetS features, although inflammation was detected just on the WDF-fed animals. Moreover, the WDF promoted a more pronounced functional, metabolic, and oxidative cardiac disorder, suggesting to be an adequate model for studying CVD in the scenario of MetS. (c) 2021 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 14/22152-0 - Proteoma miocárdico de ratos obesos por dieta ocidental com disfunção cardíaca
• Beneficiário: Danielle Fernandes Vileigas
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/16934-8 - Proteoma miocárdico de ratos obesos por dieta ocidental com disfunção cardíaca
• Beneficiário: Antonio Carlos Cicogna
• Modalidade de apoio: Auxílio à Pesquisa - Regular