Exposure to Dichlorvos pesticide alters the morphology of and lipid metabolism in the ventral prostate of rats

Autor(es)

Quintino-Ottonicar, Giovanna Galo ; da Silva, Laura Ribeiro ; Maria, Vinicius Luis Rocha da Silva ; Pizzo, Eleonora Malavolta ; de Santana, Ana Clara Pacheco ; Lenharo, Naira Ruiz ; Pinho, Cristiane Figueiredo ; Pereira, Sergio

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN TOXICOLOGY; v. 5, p. 11-pg., 2023-07-04.

Resumo

Organophosphate pesticides are widely used in agriculture, leading to soil, water, and food contamination. Among these compounds is Dichlorvos [O,O-dimethyl O-(2,2-dichlorovinyl)phosphate, DDVP], which is listed as a highly toxic compound by the Environmental Protection Agency and World Health Organization. Exposure to DDVP can result in nervous, respiratory, hepatic, and reproductive abnormalities, in addition to endocrine disrupting, mutagenic, and carcinogenic effects. Little is known about the impacts of DDVP on the reprogramming of lipid metabolism, which is also associated with the development and progression of cancer, since the tumor cells need to recruit, capture, and use fatty acids to compose their building membranes. This study aimed to evaluate the influence of the pesticide DDVP on lipid metabolism in the prostate, after chemical induction by the carcinogen N-methyl-N-nitrosourea (MNU). For this, 32 Fischer rats aged 90 days were randomly divided into four experimental groups: Control, DDVP, MNU, and MNU + DDVP. The MNU and MNU + DDVP groups underwent chemical induction with MNU (15 mg/kg) and the DDVP and MNU + DDVP groups received a diet supplemented with DDVP (10 mg/kg). Histopathological analyses of the rat ventral prostate showed 100% incidence of epithelial hyperplasia in the MNU and MNU + DDVP groups. This finding was accompanied by an increase of the epithelial compartment in the MNU + DDVP group. Immunolocalization of important proteins linked to lipid metabolism has been established. In the MNU + DDVP group, Western blotting analyses pointed out an increased expression of the protein LIMP II (Lysosomal Integral Membrane Protein-II), which is correlated with the capture and distribution of lipids in tumor cells. Together, these results indicate that the association of a low dose of DDVP with MNU was able to promote alterations in the morphology and lipid metabolism of the rat ventral prostate, which may be related to tumor progression in this organ. (AU)

• Processo FAPESP: 19/01469-9 - Influência do praguicida diclorvós sobre o desenvolvimento de lesões prostáticas induzidas por MNU em ratos: avaliação de marcadores moleculares de inflamação
• Beneficiário: Giovanna Galo Quintino
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
• Processo FAPESP: 22/04198-9 - Avaliação dos efeitos do pesticida diclorvós sobre proteínas reguladoras da lipogênese na próstata de ratos induzidos quimicamente por MNU
• Beneficiário: Laura Ribeiro da Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 17/08505-5 - Influência do praguicida diclorvós sobre o desenvolvimento de lesões prostáticas induzidas por mnu em ratos - avaliação de marcadores de inflamação
• Beneficiário: Sérgio Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Regular