Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ LAReferencia - Red F...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
versions View all 1 versions
addClaim

This Research product is the result of merged Research products in OpenAIRE.

You have already added 0 works in your ORCID record related to the merged Research product.

Influência do praguicida diclorvós sobre os marcadores moleculares de angiogênese na próstata de ratos

Authors: Lenharo, Naíra Ruiz;

Influência do praguicida diclorvós sobre os marcadores moleculares de angiogênese na próstata de ratos

Abstract

Os pesticidas organofosforados, como por exemplo o diclorvós (DDVP), são amplamente utilizados na atualidade, apesar de existirem muitos estudos que comprovem a sua atuação como desreguladores endócrinos. Esses desreguladores são capazes de interferir na homeostase mantida pelos hormônios e podem estar ligados ao desenvolvimento de lesões neoplásicas no sistema genital masculino, como o câncer de próstata, que representa a segunda maior incidência de neoplasias no sexo masculino no mundo. A progressão dessas lesões pode se dar através do processo de angiogênese e depende do equilíbrio local nas atividades de fatores proangiogênicos e antiangiogênicos. Um dos fatores antiangiogênicos mais bem estudados é a endostatina, inibidor endógeno da angiogênese, enquanto que o fator proangiogênico mais importante é o VEGF, juntamente com o seu receptor Flk-1. A angiogênese pode ser induzida pela hipóxia que ocorre no ambiente tumoral devido à disponibilidade limitada de oxigênio entre as células proliferativas. Assim, o presente estudo teve como objetivo analisar a morfologia e os marcadores moleculares envolvidos no processo de angiogênese (HIF-1α, VEGF, Flk-1 e endostatina) na próstata de ratos para avaliar a influência do praguicida diclorvós, associado ou não à indução química por N-metil-N-nitrosoureia (MNU). Foram utilizados 32 ratos da linhagem Fischer 344, com idade de 90 dias. Os ratos foram separados em quatro grupos experimentais: Controle, DDVP, MNU, MNU+DDVP. Foram feitas análises histopatológica, morfométrico-estereológica, imuno-histoquímica e de Western Blotting da próstata ventral dos ratos. Verificou-se o surgimento de lesões, como hiperplasia epitelial, atrofia, inflamação, atipia celular com inclusões citoplasmáticas e metaplasia com hiperplasia estromal. Houve aumento na incidência de hiperplasia epitelial nos grupos MNU e MNU+DDVP e aumento no volume relativo do epitélio da próstata no grupo MNU+DDVP em relação ao grupo Controle. Não houve diferenças significativas entre os grupos em relação ao índice de densitometria óptica de proteínas angiogênicas. Os resultados obtidos revelam que o DDVP, associado ao MNU, promoveu o desenvolvimento de lesões e alterou aspectos morfológicos da próstata ventral de ratos, mas não alterou a expressão de marcadores moleculares de angiogênese.

Organophosphate pesticides, such as dichlorvos (DDVP), are widely used, although there are many studies that prove their role as endocrine disrupters. These disruptors are capable of interfering with hormone-maintained homeostasis and may be linked to the development of neoplastic lesions in the male genital system, such as prostate cancer, which represents the world’s second highest incidence of male neoplasia. The progression of these lesions may occur through the angiogenesis process and depends on the local balance in the activities of proangiogenic and antiangiogenic factors. One of the most studied antiangiogenic factors is endostatin, an endogenous inhibitor of angiogenesis, while the most important proangiogenic factor is VEGF, and its receptor Flk-1. Angiogenesis may be induced by hypoxia that occurs in the tumor environment due to limited oxygen availability among proliferating cells. Thus, the present study aimed to evaluate the morphology and analyze the molecular markers involved in angiogenesis process (HIF-1α, VEGF, Flk-1 and endostatin) in the prostate of rats to assess the influence of the pesticide dichlorvos, associated or not with chemical induction by MNU. 32 Fischer 344 rats, aged 90 days, were used. The rats were separated into four experimental groups: Control, DDVP, MNU, MNU + DDVP. Histopathological, morphometric-stereological, immunohistochemical and Western Blotting analyzes of the ventral prostate of rats were performed. Lesions appeared, such as epithelial hyperplasia, atrophy, inflammation, cell atypia with cytoplasmic inclusions and metaplasia with stromal hyperplasia. There was an increase in the incidence of epithelial hyperplasia in the MNU and MNU + DDVP groups and an increase in the relative volume of the prostate epithelium in the MNU + DDVP group compared to the Control group. There were no significant differences between the groups regarding the optical densitometry index of angiogenic proteins. The results obtained reveal that DDVP, associated with MNU, promoted the development of lesions and altered morphological aspects of the ventral prostate of rats, but did not alter the expression of molecular markers of angiogenesis.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Pós-graduação em Biociências - FCLAS

88882.432720/2019-01

Keywords

Endostatin, Dichlorvos, Prostate, Angiogenesis, Aparelho genital masculino, Pesticidas, Neovascularização

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green
Related to Research communities
Cancer Research