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Biochemical, hematological and immunological parameters and relationship with occupational exposure to pesticides and metals

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Abstract

This study aimed to evaluate biomarkers of exposure to cholinesterase inhibitors insecticides (AChE and BuChE activities) and metals (As, Cd, Cr, Mn, Ni, and Pb blood levels) and their associations with biochemical, hematological, and immunological parameters in farmers from Southern Brazil. One hundred and sixteen individuals were divided into two groups: 62 farmers (exposed group) and 54 subjects non-occupationally exposed (NOE) to agrochemicals. Erythrocyte (AChE) and serum (BuChE) cholinesterases activities were significantly reduced as well as blood Cd and Pb levels were increased in farmers when compared to NOE group (p < 0.05). Farmers presented increased glucose and urea levels compared to NOE group, which were inversely associated with AChE and positively correlated with Cd (p < 0.05), respectively. In addition, Cd was inversely associated with the hematological cells counts, which were significantly reduced in farmers (p < 0.05). C3 complement was higher in farmers and was positively associated with blood Pb (p < 0.05). Surface protein expression analysis revealed a downregulation of LFA-1 and ICAM-1 in farmers. Inverse associations were found between LFA-1 and blood As, Cr, and Ni levels (p < 0.05). Taken together, our results pointed to a relationship between agrochemicals and metals exposure and biochemical, hematological, and immunological disorders that can lead to several chronic conditions.

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Acknowledgments

The authors would like to thank the volunteers from Agudo and Porto Alegre, RS, Brazil. Especially to the Banrisul and Mr. Sérgio Arantes who were essential for the development of this study. The authors wish to thank all the people who volunteered to participate in this study. The authors are also grateful to Fernando Freitas and Otávio Lovison for their help during sample collection.

Funding

This work was supported by (FAPERGS/MS/CNPq/SESRS n. 03 2017 – PPSUS 2017, grant to S.C. Garcia), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES/PROEX), PROREXT/UFRGS and also Conselho Nacional de Pesquisa e Desenvolvimento (CNPq)/Universal (n°420379/2016-9, grant to M.D. Arbo). L.V. Cestonaro received a CAPES MSc. research fellowship. S.C.Garcia was receipt of a CNPq Research Fellowship.

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Correspondence to Solange Cristina Garcia.

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Responsible editor: Lotfi Aleya

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Cestonaro, L.V., Garcia, S.C., Nascimento, S. et al. Biochemical, hematological and immunological parameters and relationship with occupational exposure to pesticides and metals. Environ Sci Pollut Res 27, 29291–29302 (2020). https://doi.org/10.1007/s11356-020-09203-3

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  • DOI: https://doi.org/10.1007/s11356-020-09203-3

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