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Antonini, James M; Kodali, Vamsi; Meighan, Terence G; Roach, Katherine A; Roberts, Jenny R; Salmen, Rebecca; Boyce, Greg R; Zeidler-Erdely, Patti C; Kashon, Michael; Erdely, Aaron; Shoeb, Mohammad
Scientific reports, 02/2019, Volume: 9, Issue: 1Journal Article
The objective of the current study was to determine if age, diet, and genetic disposition (animal strain) in an animal model had early effects on specific molecular markers in circulating peripheral blood mononuclear cells (PBMCs). Three strains Sprague-Dawley (SD), Fischer 344 (F344), and Brown-Norway (BN) of male rats were maintained on a high-fat (HF) or regular diet. Blood was collected at 4, 12, and 24 wk to assess chemistry and to recover PBMCs. Triglycerides and body weight gain increased at all time points in the HF diet group for each strain. Telomere length in PBMCs decreased in the HF diet group compared to the regular diet group up to 24 wk in all strains. Telomere length decreased in PBMCs at 24 wk compared to baseline in all strains, indicating an age-related effect. These findings highlight that diet and age cause changes in PBMCs recovered from different strains of rats. The next tier of studies will examine the contribution of an occupational exposure (e.g., welding fume inhalation) in combination with diet, age, and strain, to assess changes in the molecular responses of isolated PBMCs. In addition, studies involving lifestyle exposure (e.g., tobacco smoke) are in the planning stages and will assess the long-term effects of exposure in our animal model.
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