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Effect of brazil nut (Bertholetia excelsa H.B.K.) consumption on selenocompouds in chronic use of statins

Grant number: 16/05677-7
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): December 01, 2016
Effective date (End): February 29, 2020
Field of knowledge:Health Sciences - Nutrition
Principal Investigator:Anderson Marliere Navarro
Grantee:Lígia Moriguchi Watanabe
Home Institution: Faculdade de Medicina de Ribeirão Preto (FMRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Associated scholarship(s):18/09478-4 - Effects of selenium supplementation in mice with hypercholesterolemia using statin, BE.EP.DR

Abstract

Introduction: Statins inhibit the first steps of cholesterol biosynthesis in the Mevalonate pathway. This pathway is also important for the maturation of selenocysteine tRNA (Sec tRNA), responsible for the expression of all selenoproteins, and when inhibited results in decreased availability of selenoproteins. The decrease in selenoproteins has been associated with side effects related to the use of statins such as myopathies and increased oxidative stress. Aims: To assess the effects of consumption of Brazil nuts in patients with dyslipidemia, chronically treated with statins compared selenium concentrations, selenometabolites and selenoproteins, and possible changes in gene expression of selenoproteins P, N and glutathione peroxidase. Furthermore, to evaluate the effects of polymorphisms on genes of selenoproteins P, S and glutathione peroxidase 1 in these patients. Methodology: The study will be performed in the Clinics Hospital at Ribeirão Preto Medical School. The sample will consist of 35 male subjects aged 19-60 years with dyslipidemia in statin use for more than a year. Participants will receive one unit of Brazil nut for 3 months. It will be conducted two periodic evaluations for assessment of body composition, food intake, in addition to collecting blood samples for analysis of the following parameters: lipid profile; selenium and selenometabolites; glutathione peroxidase activity; liver enzymes; C-reactive protein; oxidative stress; gene expression and polymorphisms in selenoproteins. Statistical tests will be used to assess differences between the groups and the correlations between the variables of interest.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
WATANABE, LIGIA MORIGUCHI; DE LIMA, LIVIA FERNANDES; FERRAZ-BANNITZ, RAFAEL; TAKAARA, DANIELA; ROMANO, BEATRIZ COIMBRA; BRAGA COSTA, TELMA MARIA; FOSS DE FREITAS, MARIA CRISTINA; BUENO, ANA CAROLINA; BARBOSA JUNIOR, FERNANDO; NAVARRO, ANDERSON MARLIERE. Association between creatine kinase activity, oxidative stress and selenoproteins mRNA expression changes after Brazil nut consumption of patients using statins. Clinical Nutrition, v. 39, n. 10, p. 3175-3181, OCT 2020. Web of Science Citations: 0.

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