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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.)

Absorption of PCB126 by upper airways impairs G protein-coupled receptor-mediated immune response

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Shimada, Ana Lucia B. [1] ; Cruz, Wesley S. [1] ; Loiola, Rodrigo A. [1] ; Drewes, Carine C. [1] ; Doerr, Fabiane [1] ; Figueiredo, Natalia G. [1] ; Pinto, Ernani [1] ; Farsky, Sandra H. P. [1]
Total Authors: 8
[1] Univ Sao Paulo, Sch Pharmaceut Sci, Dept Clin & Toxicol Analyses, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 5, OCT 9 2015.
Web of Science Citations: 4

PCB126 is a dioxin-like polychlorinated biphenyl (PCB) environmental pollutant with a significant impact on human health, as it bioaccumulates and causes severe toxicity. PCB126-induced immune toxicity has been described, although the mechanisms have not been fully elucidated. In this study, an in vivo protocol of PCB126 intoxication into male Wistar rats by intranasal route was used, which has not yet been described. The intoxication was characterised by PCB126 accumulation in the lungs and liver, and enhanced aryl hydrocarbon receptor expression in the liver, lungs, kidneys, and adipose tissues. Moreover, an innate immune deficiency was characterised by impairment of adhesion receptors on blood leukocytes and by reduced blood neutrophil locomotion and oxidative burst activation elicited by ex vivo G protein-coupled receptor (GPCR) activation. Specificity of PCB126 actions on the GPCR pathway was shown by normal burst oxidative activation evoked by Toll-like receptor 4 and protein kinase C direct activation. Moreover, in vivo PCB180 intoxication did not alter adhesion receptors on blood leukocytes either blood neutrophil locomotion, and only partially reduced the GPCR-induced burst oxidative activation on neutrophils. Therefore, a novel mechanism of in vivo PCB126 toxicity is described which impairs a pivotal inflammatory pathway to the host defence against infections. (AU)

FAPESP's process: 12/02994-0 - Experimental study of PCB126 exposure on induction type II Diabetes mellitus
Grantee:Sandra Helena Poliselli Farsky
Support Opportunities: Regular Research Grants
FAPESP's process: 11/09677-8 - Experimental study of exposure to PCB126 on induction of type II Diabetes Mellitus
Grantee:Ana Lucia Borges Shimada
Support Opportunities: Scholarships in Brazil - Doctorate