title: Homocysteine and cysteine concentrations are modified by recent exposure to environmental air pollution in São Paulo, Brazil.
abstract: Millions of people worldwide are affected by anthropogenic air pollution derived from the combustion of fossil fuels. In this work, we tested the effects of fetal, lactation and post-weaning ambient air pollution exposure on total homocysteine (tHcy) concentrations and on a downstream pathway element, the plasma cysteine (Cys) concentration. Two similar exposure chambers (polluted and filtered chamber) were located near an area with heavy traffic in São Paulo, Brazil, and male Swiss mice were housed there from the pre-natal period until 3 months of age. Groups during fetal, lactation and adult periods of exposure were apportioned, and tHcy and Cys plasma concentrations were assessed when the animals were 3 months old. In our study, both the tHcy and Cys concentrations were decreased in groups that spent their final stage of life in polluted chambers, suggesting recent alterations in tHcy and Cys concentrations due to air pollution exposure. The possible relationship of these data with cardiovascular dysfunction is still a matter of controversy in animals; nevertheless, epigenetic mechanisms emerge as a possible issue to consider in the investigation of the link between air pollution and Hcy measurement.
authors.affiliation: Department of Psychobiology, Federal University of São Paulo, São Paulo, Brazil.
authors.forename: Karina
authors.initials: K
authors.lastname: Camasmie Abe
authors.forename: Letícia
authors.initials: L
authors.lastname: de Campos Brandão
authors.forename: Bruno Frederico
authors.initials: BF
authors.lastname: Aguilar Calegare
authors.forename: Sérgio
authors.initials: S
authors.lastname: Tufik
authors.forename: Paulo Hilário
authors.initials: PH
authors.lastname: do Nascimento Saldiva
authors.forename: Vânia
authors.initials: V
authors.lastname: D'Almeida
mesh_terms: D000393:Air Pollutants / Q000493:pharmacokinetics / Q000633:toxicity*; D000818:Animals; D001938:Brazil; D003545:Cysteine / Q000097:blood*; D004781:Environmental Exposure; D005260:Female; D006710:Homocysteine / Q000097:blood*; D016014:Linear Models; D008297:Male; D018811:Maternal Exposure; D051379:Mice; D023421:Models, Animal; D011247:Pregnancy; D014505:Urban Population; D001335:Vehicle Emissions
chemical_list: D000393:Air Pollutants; D001335:Vehicle Emissions; D006710:Homocysteine; D003545:Cysteine