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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Polymorphisms of genes related to metabolism of lead (Pb) are associated with the metal body burden and with biomarkers of oxidative stress

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Author(s):
Gomes, Willian Robert [1] ; Devoz, Paula Picoli [1] ; Cano Luiz, Bruno Limonti [1] ; Grotto, Denise [2] ; Batista, Bruno Lemos [3] ; Barbosa, Jr., Fernando [1] ; Mazzaron Barcelos, Gustavo Rafael [4]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, Dept Clin Anal Toxicol & Food Sci, Ave Cafe S-N, BR-14040903 Ribeirao Preto - Brazil
[2] Univ Sorocaba, Rodovia Raposo Tavares, Km 92-5, BR-18023000 Sorocaba, SP - Brazil
[3] Fed Univ ABC, Ctr Nat & Human Sci, Ave Estados 5001, BR-09210580 Santo Andre - Brazil
[4] Univ Fed Sao Paulo, Inst Hlth & Soc, Dept Biosci, Ave Ana Costa 95, BR-11060001 Santos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS; v. 836, n. B, SI, p. 42-46, DEC 2018.
Web of Science Citations: 1
Abstract

Individual susceptibility to the toxic effects induced by exposure to lead (Pb) may be affected by several variables, such as environmental factors, as well as intrinsic variations among the individuals, which are hypothetically associated to genetic differences in enzymes metabolizing the metal. Aim of the present study was to evaluate the effects of polymorphisms of glutathione (GSH)-genes related to the antioxidant status and Pb metabolism (GCLC, rs17883901 and GCLM, rs41303970) on Pb levels in blood (B-Pb) and plasma (P-Pb), as well as Pb-related effects on activity of glutathione-peroxidase (GPX) and on GSH concentrations. A cross-sectional study with 236 adults (men, > 18 years old) was carried out with workers from automotive battery factories, Brazil. B-Pb and P-Pb were determined by ICP-MS; blood GPX and GSH were determined by spectrophotometry and qPCR TaqMan assays were used for genotyping. A questionnaire was applied in order to collect socio-demographic, lifestyle and time of exposure. The mean B-Pb level was 211 +/- 118 mu g/L and P-Pb was 6.05 +/- 7.13 mu g/L. GCLM are associated with changes of B-Pb and P-Pb; individuals who carry at least one polymorphic allele for GCLM gene had lower metal levels in the blood and plasma (beta = -1.5; p = 0.0080; beta = -0.12 and p = 0.050). In addition, individuals carrying at least one polymorphic allele for the GCLC gene had higher concentrations of GSH than the non-polymorphic ones, as a function of B-Pb (beta = 0.072; p = 0.029). Significant associations were also observed with GCLC polymorphism on GSH concentrations (as a function of P-Pb), that is, polymorphic individuals tended to have higher concentrations of GSH than non-polymorphic ones (beta = 0.072; p = 0.030), while those individuals who are polymorphic for GCLM had higher activities of GPX, compared to the non-variant genotype (beta = 0.19; p = 0.028). Taken together, our data indicate that polymorphisms related to Pb toxicokinetics modify the metal body burden and Pb-related antioxidant effects. (AU)

FAPESP's process: 15/01157-6 - Influence of glutamyl-cysteine ligase (catalytic subunit, GCLC, and modifier, GLCM) gene polymorphisms evaluation on lead concentrations in workers exposed to metal
Grantee:Bruno Limonti Cano Luiz
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 13/06033-8 - Combining omics tools for predicting multivariate models in populations exposed to toxic metals
Grantee:Gustavo Rafael Mazzaron Barcelos
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 15/04786-4 - Evaluation of lead-induced oxidative stress exposure in workers of automotive battery plants
Grantee:Willian Robert Gomes
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 14/24981-3 - Combining omics tools for predicting multivariate models in populations exposed to toxic metals
Grantee:Gustavo Rafael Mazzaron Barcelos
Support type: Scholarships in Brazil - Young Researchers
FAPESP's process: 15/07277-3 - Evaluation of lead exposure on the methylation pattern of promoter regions of genes associated to the metal metabolism, in workers of automotive battery industries
Grantee:Paula Pícoli Devóz
Support type: Scholarships in Brazil - Master