Advanced search
Start date

Impact of methylmercury (MeHg) exposure on genomic stability and biochemical parameters related to redox status, in individuals from Amazonian riverside communities chronically exposed to metal, via diet

Grant number: 20/07488-2
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): November 01, 2021
Effective date (End): February 28, 2025
Field of knowledge:Health Sciences - Pharmacy - Toxicological Analysis
Principal Investigator:Fernando Barbosa Júnior
Grantee:Nathália de Assis Aguilar Duarte
Host Institution: Instituto de Saúde e Sociedade (ISS). Universidade Federal de São Paulo (UNIFESP). Campus Baixada Santista. Santos , SP, Brazil
Associated research grant:18/24069-3 - ReSEARCH: Recognizing Signatures of the Exposome to Anticipate the Risks for a Continuous Health, AP.TEM


Epidemiological evidence has shown that Hg causes disturbances in the redox status, leading to oxidative and DNA damage. However, no studies have been conducted to evaluate the impact of metal exposure on the expression of genes associated with DNA damage signaling pathway as well as the possible influences of genetic polymorphisms of the DNA repair system on the genotoxicity induced by the metal. In this context, the aims of the present study are to evaluate impact of Hg exposure on redox status, on genomic stability, expression profile of genes related to DNA repair and the influence of genetic polymorphisms related to DNA repair system on this biologics markers, in Amazonian riverside communities exposed to the metal, via diet. Thus, metal concentrations (and its chemical species) will be determined in blood, plasma, urine and hair by LC-ICP-MS and several determinations and biochemical parameters related to the oxidative stress will be conducted by LC-MS/MS. The genomic stability will be evaluated by Buccal Micronucleus Cytome assay (BMNCyt) and comet assay (SCGE) in peripheric blood. Genes expressions of DNA repair system will be performed by qPCR and genotyping will be conducted by TaqMan assays. Thus, it is expected that the obtained results will assist for a better understanding of the molecular mechanisms related to the toxicity caused by the metal as well its interaction with genetics events. (AU)

News published in Agência FAPESP Newsletter about the scholarship:
Articles published in other media outlets (0 total):
More itemsLess items

Please report errors in scientific publications list using this form.