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Lacrimal Cytokines Assessment in Subjects Exposed to Different Levels of Ambient Air Pollution in a Large Metropolitan Area

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Matsuda, Monique [1] ; Bonatti, Rodolfo [1] ; Marquezini, Monica V. [2] ; Garcia, Maria L. B. [2] ; Santos, Ubiratan P. [3] ; Braga, Alfesio L. F. [2, 4] ; Alves, Milton R. [1] ; Saldiva, Paulo H. N. [2] ; Monteiro, Mario L. R. [1]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sch Med, Lab Invest Ophthalmol LIM 33, Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Sch Med, Lab Expt Air Pollut LPAE, Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Fac Med, Hosp Clin, Pulm Div, Heart Inst InCor, Sao Paulo, SP - Brazil
[4] Univ Catolica Santos, Environm Exposure & Risk Assessment Grp, Collect Hlth Postgrad Program, Santos, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: PLoS One; v. 10, n. 11 NOV 20 2015.
Citações Web of Science: 6

Background Air pollution is one of the most environmental health concerns in the world and has serious impact on human health, particularly in the mucous membranes of the respiratory tract and eyes. However, ocular hazardous effects to air pollutants are scarcely found in the literature. Design Panel study to evaluate the effect of different levels of ambient air pollution on lacrimal film cytokine levels of outdoor workers from a large metropolitan area. Methods Thirty healthy male workers, among them nineteen professionals who work on streets (taxi drivers and traffic controllers, high pollutants exposure, Group 1) and eleven workers of a Forest Institute (Group 2, lower pollutants exposure compared to group 1) were evaluated twice, 15 days apart. Exposure to ambient PM2.5 (particulate matter equal or smaller than 2.5 mu m) was 24 hour individually collected and the collection of tears was performed to measure interleukins (IL) 2, 4, 5 and 10 and interferon gamma (IFN-gamma) levels. Data from both groups were compared using Student's t test or Mann-Whitney test for cytokines. Individual PM2.5 levels were categorized in tertiles (lower, middle and upper) and compared using one-way ANOVA. Relationship between PM2.5 and cytokine levels was evaluated using generalized estimating equations (GEE). Results PM2.5 levels in the three categories differed significantly (lower: <= 22 mu g/m(3); middle: 23-37.5 mu g/m(3); upper: >37.5 mu g/m(3); p<0.001). The subjects from the two groups were distributed unevenly in the lower category (Group 1 = 8%; Group 2 = 92%), the middle category (Group 1 = 89%; Group 2 = 11%) and the upper category (Group 1 = 100%). A significant relationship was found between IL-5 and IL-10 and PM2.5 levels of the group 1, with an average decrease of 1.65 pg/mL of IL-5 level and of 0.78 pg/mL of IL-10 level in tear samples for each increment of 50 mu g/m(3) of PM2.5 (p = 0.01 and p = 0.003, respectively). Conclusion High levels of PM2.5 exposure is associated with decrease of IL-5 and IL-10 levels suggesting a possible modulatory action of ambient air pollution on ocular surface immune response. (AU)

Processo FAPESP: 14/50110-0 - Marcadores de suscetibilidade à poluição do ar
Beneficiário:Paulo Hilário Nascimento Saldiva
Linha de fomento: Auxílio à Pesquisa - Pesquisa em Políticas Públicas para o SUS