Effect of fluoride in parameters related to insulin sensitivity and apoptosis of ² cells

• Grant number: 18/00352-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2018
• End date: November 30, 2022
• Field of knowledge: Health Sciences - Dentistry - Social and Preventive Dentistry
• Principal Investigator: Ana Carolina Magalhães
• Grantee: Nathalia Rabelo Buzalaf
• Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil

Abstract

Fluoride (F) is a relevant ion in Public Health because of its ability to prevent dental caries. However, chronic exposure to high fluoride levels can cause dental and skeletal fluorosis. After absorption, F is distributed to the whole body and is stored mainly in calcified tissues (and in soft tissues to lesser extent). Its excretion occurs mainly via renal system, despite many molecular mechanisms involved in F metabolism are not precisely known so far. In the last decades, several studies attempted to unravel the influence of F in several metabolic pathways, since this ion inhibits several enzymes. Some studies have reported that chronic administration of F causes insulin resistance, despite recent studies revealed increased insulin sensitivity when low doses of F are given to rats with streptozotocin-induced diabetes or to nonobese diabetic (NOD) mice. Thus, the aim of the present study is to investigate, in NOD mice, the effect of exposure to F from drinking water in parameters related to insulin sensitivity and apoptosis of ² cells. For this purpose, 40 female NOD mice will be obtained and divided into 2 groups and treated for 30 weeks with drinking water containing 0 (control) or 10 ppm F (as NaF) After the treatment, the animals will be euthanized. F will be analyzed in plasma, liver and gastrocnemius muscle. Blood glucose and insulin will be evaluated. Morphologic analysis, analysis of insulin expression, apoptosis of ² cells and determination of insulitis will be performed in pancreas. After checking for normality and homogeneity, the data will be submitted to the appropriate statistical test (p <0.05). (AU)

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)

JULIANA SANCHES TREVIZOL; ALINE DIONIZIO; AISLAN QUINTILIANO DELGADO; TALITA MENDES OLIVEIRA VENTURA; CAROLINE FERNANDA DA SILVA RIBEIRO; LAURA RIBEIRO; NATHALIA RABELO BUZALAF; TÂNIA MARY CESTARI; ANA CAROLINA MAGALHÃES; MAIKO SUZUKI; et al. Metabolic effect of low fluoride levels in the islets of NOD mice: integrative morphological, immunohistochemical, and proteomic analyses. Journal of Applied Oral Science, v. 31, 2023-06-05. (18/00352-8)