Effects of chronic noise on glucose metabolism and gut microbiota-host inflammatory homeostasis in rats.
Chronic noise exposure has been implicated in increased risk of diabetes. However, there is limited experimental evidence of the mechanisms linking chronic noise stress and glucose metabolism. We addressed this in the present study by examining glucose metabolism, immune response, and changes in gut microbiota/host inflammatory homeostasis in rats exposed to noise for 30 consecutive days. Chronic noise exposure increased blood glucose and corticosterone levels for at least 14 days after cessation of noise. Stressed rats also exhibited elevated levels of glycogen and triglyceride in the liver and impaired hepatic insulin production via insulin-induced insulin receptor/insulin receptor substrate 1/glycogen synthase kinase 3β signalling, which persisted for 3-14 days after cessation of noise exposure. Chronic noise altered the percentage of Proteobacteria and Actinobacteria in the gut, increasing Roseburia but decreasing Faecalibacterium levels in the cecum relative to controls. Immunoglobulin A, interleukin 1β, and tumor necrosis factor α levels were also elevated in the intestine of these animals, corresponding to noise-induced abnormalities in glucose regulation and insulin sensitivity. These results suggest that lifelong environmental noise exposure could have cumulative effects on diabetes onset and development resulting from alterations in gut microbiota composition and intestinal inflammation.
Department of Occupational Hygiene, Tianjin Institute of Health and Environmental Medicine, Tianjin, China.
Bo
B
Cui
Department of Occupational Hygiene, Tianjin Institute of Health and Environmental Medicine, Tianjin, China.|School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Jinan, China.|Shandong academy of occupational health and occupational medicine, Shandong academy of medical sciences, Jinan, China.
Zhihui
Z
Gai
Department of Occupational Hygiene, Tianjin Institute of Health and Environmental Medicine, Tianjin, China.
Xiaojun
X
She
Shandong academy of occupational health and occupational medicine, Shandong academy of medical sciences, Jinan, China.
Rui
R
Wang
Department of Occupational Hygiene, Tianjin Institute of Health and Environmental Medicine, Tianjin, China.
Zhuge
Z
Xi
D000818:Animals; D001786:Blood Glucose / Q000378:metabolism*; D003345:Corticosterone / Q000097:blood; D000069196:Gastrointestinal Microbiome; D006706:Homeostasis; D054884:Host-Pathogen Interactions; D007249:Inflammation / Q000378:metabolism* / Q000382:microbiology*; D007328:Insulin / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D009622:Noise; D051381:Rats
D001786:Blood Glucose; D007328:Insulin; D003345:Corticosterone