"Exposure to polybrominated diphenyl ethers (PBDEs) suppresses the rele" by Stephen R. Hennigar

Date of Award

Spring 2010

Project Type

Thesis

Program or Major

Nutritional Sciences

Degree Name

Master of Science

First Advisor

Anthony R Tagliaferro

Abstract

Endocrine disrupting chemicals have adverse effects on immune function that may result in respiratory conditions. Inhalation of dust is a major route of exposure to PBDEs; however, the impact of PBDEs on the immune response is unclear. The objective of this in vitro study was to determine the impact of PBDEs on the release of pro-inflammatory cytokines by activated alveolar macrophages. Porcine alveolar macrophages were grown in RPMI growth media supplemented with 10% porcine serum and incubated for 24-hours. After 24-hours, cells were activated by inoculation with PMA. In addition to PMA, different concentrations of the PBDE mixture DE-71 were introduced to the wells. After 6-hour incubation, conditioned media was removed and analyzed. Cells exposed to PMA and PBDEs released significantly less pro-inflammatory cytokines compared to controls. Suppression of pro-inflammatory cytokines---characteristic of a compromised immune system---suggests that persistent exposure to PBDEs may increase the susceptibility to respiratory conditions.

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