Exposure to fine particulate matter in the air alters placental structure and the renin-angiotensin system

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art_SOTO_Exposure_to_fine_particulate_matter_in_the_air_2017.PDF (1.06 MB)
Citações na Scopus
39
Tipo de produção
article
Data de publicação
2017
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
PUBLIC LIBRARY SCIENCE
Autores
MELO, Juliana Oliveira de
LOPES, Karen Lucasechi
SOUZA, Regiane Machado de
Citação
PLOS ONE, v.12, n.8, article ID e0183314, 14p, 2017
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Transforming growth factor beta 1 (TGF beta 1), the uteroplacental renin-angiotensin system (RAS) and vascular endothelial growth factor A (VEGF-A) participate in the placentation process. The aim of this study was to investigate the effects of exposure to pollutants on the placenta. Methods Female Wistar rats were exposed to filtered air (F) or to concentrated fine particulate matter (P) for 15 days. After mating, the rats were divided into four groups and again exposed to F or P (FF, FP, PF, PP) beginning on day 6 of pregnancy. At embryonic day 19, the placenta was collected. The placental structure, the protein and gene expression of TGF beta 1, VEGF-A, and its receptor Flk-1 and RAS were evaluated by indirect ELISA and quantitative real-time PCR. Results Exposure to P decreased the placental mass, size, and surface area as well as the TGF beta 1, VEGF-A and Flk-1 content. In the maternal portion of the placenta, angiotensin II (AngII) and its receptors AT(1) (AT(1)R) and AT(2) (AT(2)R) were decreased in the PF and PP groups. In the fetal portion of the placenta, AngII in the FP, PF and PP groups and AT(2)R in the PF and PP groups were decreased, but AT(1)R was increased in the FP group. VEGF-A gene expression was lower in the PP group than in the FF group. Conclusions Exposure to pollutants before and/or during pregnancy alters some characteristics of the placenta, indicating a possible impairment of trophoblast invasion and placental angiogenesis with possible consequences for the maternal-fetal interaction, such as a limitation of fetal nutrition and growth.
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URI
https://observatorio.fm.usp.br/handle/OPI/22008
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MPT
Artigos e Materiais de Revistas Científicas - FM/MCM
Artigos e Materiais de Revistas Científicas - HC/InCor
Artigos e Materiais de Revistas Científicas - LIM/05
Artigos e Materiais de Revistas Científicas - LIM/16
Artigos e Materiais de Revistas Científicas - ODS/03