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Avaliação do sistema redox pela via de ativação do Nrf2 e potencial efeito antioxidante do resveratrol em modelo in vitro de pré-eclâmpsia

Authors: Dias, Mayara Caldeira;

Avaliação do sistema redox pela via de ativação do Nrf2 e potencial efeito antioxidante do resveratrol em modelo in vitro de pré-eclâmpsia

Abstract

A pré-eclâmpsia é uma das principais causas de mortalidade e morbidade entre as gestantes no Brasil e em vários países. A fisiopatologia desta doença é complexa e envolve vários processos. Um desses relaciona-se a um status oxidativo, onde há prevalência de produção de radicais livres e/ou redução da atividade antioxidante. Recentemente, vem sendo explorado como terapia em várias doenças o antioxidante resveratrol, presente em grandes quantidades principalmente nas uvas vermelhas. O resveratrol, além de sequestrar espécies reativas de oxigênio e possuir outros mecanismos de ação, atua ativando o fator de transcrição Nrf2 (nuclear factor, erythroid 2-like 2), responsável pela transcrição de diversos genes que promovem a proteção celular através da codificação de enzimas antioxidantes, como a hemeoxigenase (HO-1). Logo, o objetivo desse estudo foi verificar os efeitos do resveratrol sob a via de ativação do Nrf2 e seus genes alvos em modelo in vitro de pré-eclâmpsia. Esse modelo consiste na incubação de plasma/soro de pacientes pré-eclâmpticas em células endoteliais a fim de se mimetizar a disfunção endotelial característica dessa síndrome. Além disso, foi feito um estudo clínico piloto em que gestantes pré-eclâmpticas beberam suco de uva de forma aguda e tiveram o soro coletado após 1 hora da ingestão para incubação nas células endoteliais. Concluímos que há um potencial de uso do resveratrol na prevenção e tratamento da pré-eclâmpsia. Considerando ainda o uso do suco de uva ao invés do resveratrol isolado, por ser rico em diversos antioxidantes, esses podem ter uma ação conjunta potenciando ainda mais os efeitos benéficos na pré-eclâmpsia. Os estudos ainda são escassos e há muito que se investigar e aprofundar, logo futuros estudos devem ser realizados, principalmente estudos clínicos, para que haja embasamento científico suficiente para se sugerir como prática clínica o uso do resveratrol/suco de uva como auxílio na prevenção e manejo da pré-eclâmpsia.

Preeclampsia is one of the main causes of mortality and morbidity among pregnant women in Brazil and in several countries. The pathophysiology of this disease is complex and involves several processes. One of these is related to an oxidative status, where there is a prevalence of free radical production and /or reduced antioxidant activity. Recently, the antioxidant resveratrol present in large quantities mainly in red grapes, has been explored as potential therapy in several diseases. Resveratrol, in addition of reactive oxygen species scavenging and acting on other mechanisms of action, acts by activating the transcription factor Nrf2 (nuclear factor, erythroid 2-like 2), responsible for the transcription of several genes that promote cell protection through the coding of antioxidant enzymes, such as heme oxygenase-1 (HO-1). Therefore, the aim of this study was to verify the effects of resveratrol on Nrf2 activation and its target genes in an in vitro model of preeclampsia. This model consists of the incubation of plasma/serum from pre-eclamptic patients in endothelial cells in order to mimic the endothelial dysfunction characteristic of this syndrome. In addition, a pilot clinical study was carried out in which pre-eclamptic pregnant women drank grape juice acutely and had the serum collected after 1 hour of ingestion for incubation in endothelial cells. We conclude that there is a potential use of resveratrol in the prevention and management of preeclampsia. Especially the use of grape juice instead of resveratrol alone, as it is rich in several antioxidants that may act synergistically further enhancing the beneficial effects in pre-eclampsia. Studies are still scarce therefore, future studies should be carried out, mainly clinical studies, in order to create sufficient scientific basis to suggest the clinical use of resveratrol/grape juice in helping to prevent and manage preeclampsia.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Pós-graduação em Farmacologia e Biotecnologia - IBB

CAPES: 001

Country
Brazil
Keywords

Célula endotelial, Plasma, Resveratrol, Pré-eclâmpsia

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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
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