Program in Molecular Medicine
Adipose Tissue; Animals; Disease Models, Animal; Humans; Insulin Resistance; Mice; Tumor Necrosis Factor-alpha
Amino Acids, Peptides, and Proteins | Biochemistry | Cell Biology | Cellular and Molecular Physiology | Dietetics and Clinical Nutrition | Hormones, Hormone Substitutes, and Hormone Antagonists | Molecular Biology | Nutritional and Metabolic Diseases | Pathological Conditions, Signs and Symptoms | Tissues
Diet-induced obesity (DIO) predisposes individuals to insulin resistance, and adipose tissue has a major role in the disease. Insulin resistance can be induced in cultured adipocytes by a variety of treatments, but what aspects of the in vivo responses are captured by these models remains unknown. We use global RNA sequencing to investigate changes induced by TNF-alpha, hypoxia, dexamethasone, high insulin, and a combination of TNF-alpha and hypoxia, comparing the results to the changes in white adipose tissue from DIO mice. We found that different in vitro models capture distinct features of DIO adipose insulin resistance, and a combined treatment of TNF-alpha and hypoxia is most able to mimic the in vivo changes. Using genome-wide DNase I hypersensitivity followed by sequencing, we further examined the transcriptional regulation of TNF-alpha-induced insulin resistance, and we found that C/EPBbeta is a potential key regulator of adipose insulin resistance.
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DOI of Published Version
Cell Rep. 2013 Oct 17;5(1):259-70. doi: 10.1016/j.celrep.2013.08.039. Epub 2013 Oct 3. Link to article on publisher's site
Lo KA, Labadorf A, Kennedy NJ, Han MS, Yap YS, Matthews B, Xin X, Sun L, Davis RJ, Lodish HF, Fraenkel E. (2013). Analysis of in vitro insulin-resistance models and their physiological relevance to in vivo diet-induced adipose insulin resistance. Davis Lab Publications. https://doi.org/10.1016/j.celrep.2013.08.039. Retrieved from https://escholarship.umassmed.edu/davis/47
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Amino Acids, Peptides, and Proteins Commons, Biochemistry Commons, Cell Biology Commons, Cellular and Molecular Physiology Commons, Dietetics and Clinical Nutrition Commons, Hormones, Hormone Substitutes, and Hormone Antagonists Commons, Molecular Biology Commons, Nutritional and Metabolic Diseases Commons, Pathological Conditions, Signs and Symptoms Commons, Tissues Commons