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Learn MoreBackground Breakthroughs in HIV treatment, especially antiretroviral therapy (ART), have massively reduced mortality. However, ART-treated individuals display elevated rates of obesity, diabetes, and cardiovascular disease, collectively known as metabolic syndrome. These co-morbidities represent a considerable threat to long-term survival and quality of life. Previous studies have shown that high-fat feeding induces persistent low-grade systemic and adipose tissue inflammation contributing to insulin resistance and metabolic dysregulation via adipose-infiltrating macrophages.; Methods and Results Studies herein test the hypothesis that ART potentiates the inflammatory effects of a high-fat diet (HFD). C57Bl/6J mice on a HFD or standard chow containing ART or vehicle, were subjected to functional metabolic testing, RNA-sequencing of epididymal white adipose tissue (eWAT), and array-based kinomic analysis of eWAT-infiltrating macrophages. ART-treated mice on a HFD displayed fat mass accumulation, impaired glucose tolerance, and potentiated insulin resistance. Gene set enrichment and kinomic array analyses revealed a pro-inflammatory transcriptional signature depicting granulocyte migration and activation.; Conclusions The current study reveals a HFD-ART interaction that increases inflammatory transcriptional pathways in eWAT consistent with macrophage infiltration, resulting in impaired glucose metabolism, energy balance, and metabolic dysfunction. SOURCE: Mark,Emile,Pepin (pepinme@uab.edu) - Adam Wende Laboratory University of Alabama at Birmingham
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