Exposure to Particulate Matter in the Broiler House Causes Dyslipidemia and Exacerbates It by Damaging Lung Tissue in Broilers

Overview

Journal Metabolites

Publisher MDPI

Date 2023 Mar 29

PMID 36984803

Authors

Dan Shen

Qi Guo

Kai Huang

Weijia Mao

Kai Wang

Wenjie Zeng

Yansen Li

Zhendong Guo

Kentaro Nagaoka

Chunmei Li

Affiliations

Soon will be listed here.

Abstract

The high concentration of particulate matter (PM) in broiler houses seriously endangers the biological safety of broilers and causes low growth performance, deserving more attention. This study aimed to investigate the effects of PM collected from a broiler house on the lung and systemic inflammatory responses and liver lipid anabolic process in broilers. Broilers were systemically exposed to fresh air (control) and 4 mg·m and 8 mg·m total suspended particles (TSP). Lung, liver, and serum were sampled after 7 (E7) and 14 (E14) days of PM exposure and 7 days after self-recovery (R 7). Corresponding kits were used to assay the inflammatory cytokines and serum biochemical indicators. The expression levels of genes related to lipid metabolism were detected by real-time polymerase chain reaction (RT-PCR) assay. The results showed a significant decrease in the average daily gain in broilers for 7 days of PM exposure ( < 0.05) and clear lung and liver inflammations in PM groups. In addition, upregulation of lung interleukin (IL)-1β and IL-8 and serum low-density lipoprotein cholesterol (LDL-C) and triglyceride (TG) occurred after 7 days of PM exposure ( < 0.05), and upregulation of lung serum tumor necrosis factor (TNF)-α and cholesterol (CHOL) occurred after 14 days of PM exposure ( < 0.05). A decrease in serum total antioxidant capacity (T-AOC) and glutathione peroxidase (GSH-px) levels was found after 14 days of PM exposure ( < 0.05), and the GSH-px level was maintained until 7 days after cessation of exposure ( < 0.05). Seven days after cessation of exposure, the expression levels of 3-hydroxy-3-methylglutaryl-CoA synthase 2 () and fatty acid synthase () genes significantly increased ( < 0.05) and decreased ( < 0.05), respectively. These results demonstrate that exposure to PM in broiler houses can induce systemic inflammation and dyslipidemia through local pulmonary inflammation and also exert toxic effects on the liver by disturbing the expression of genes involved in the hepatic lipid anabolic process.

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