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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Concentrated ambient fine particulate matter (PM2.5) exposure induce brain damage in pre and postnatal exposed mice

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Di Domenico, Marlise [1] ; de Menezes Benevenuto, Sarah Gomes [2] ; Tomasini, Paula Pellenz [3] ; Yariwake, Victor Yuji [1] ; Alves, Nilmara de Oliveira [1] ; Rahmeier, Francine Luciano [4] ; Fernandes, Marilda da Cruz [4] ; Moura, Dinara Jaqueline [3] ; Nascimento Saldiva, Paulo Hilario [1] ; Veras, Mariana Matera [1]
Total Authors: 10
[1] Univ Sao Paulo, Sch Med, Dept Pathol, Lab Expt Air Pollut, LIM05 HCFMUSP, Sao Paulo - Brazil
[2] Univ Sao Paulo, Fac Vet Med & Anim Sci, Dept Surg, Sao Paulo - Brazil
[3] Fed Univ Hlth Sci Porto Alegre, Lab Genet Toxicol, Porto Alegre, RS - Brazil
[4] Fed Univ Hlth Sci Porto Alegre, Pathol Res Lab, Porto Alegre, RS - Brazil
Total Affiliations: 4
Document type: Journal article
Source: NeuroToxicology; v. 79, p. 127-141, JUL 2020.
Web of Science Citations: 0

Air pollution is a public health concern that has been associated with adverse effects on the development and functions of the central nervous system (CNS). However, studies on the effects of exposure to pollutants on the CNS across the entire developmental period still remain scarce. In this study, we investigated the impacts of prenatal and/or postnatal exposure to fine particulate matter (PM2.5) from Sao Paulo city, on the brain structure and behavior of juvenile male mice. BALB/c mice were exposed to PM2.5 concentrated ambient particles (CAP) at a daily concentration of 600 mu g/m(3) during the gestational {[}gestational day (GD) 1.5-18.5] and the postnatal periods {[}postnatal day (PND) 22-90] to filtered air (FA) in both periods (FA/FA), to CAP only in the postnatal period (FA/CAP), to CAP only in the gestational period (CAP/FA), and to CAP in both periods (CAP/CAP). Behavioral tests were performed when animals were at PND 30 and PND 90. Glial activation, brain volume, cortical neuron number, serotonergic and GABAergic receptors, as well as oxidative stress, were measured. Mice at PND 90 presented greater behavioral changes in the form of greater locomotor activity in the FA-CAP and CAP-CAP groups. In general, these same groups explored objects longer and the CAP-FA group presented anxiolytic behavior. There was no difference in total brain volume among groups, but a lower corpus callosum (CC) volume was observed in the CAP-FA group. Also, the CAP-CAP group presented an increase in microglia in the cortex and an increased in astrocytes in the cortex, CC, and C1A and dentate gyrus of hippocampus regions. Gene expression analysis showed a decrease in BDNF in the hippocampus of CAP-CAP group. Treatment of immortalized glial cells with non-cytotoxic doses of ambient PM2.5 increased micronuclei frequencies, indicating genomic instability. These findings highlight the potential for negative neurodevelopmental outcomes induced by exposure to moderate levels of PM2.5 in Sao Paulo city. (AU)

FAPESP's process: 13/21728-2 - The use of modern autopsy techniques to investigate human diseases (MODAU)
Grantee:Paulo Hilário Nascimento Saldiva
Support type: Research Projects - Thematic Grants