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- W3103350139 abstract "Abstract Disruption of glucose homeostasis increases the risk of type II diabetes, cardiovascular disease, stroke, and cancer. We leverage a novel rodent model, the SM/J mouse, to understand glycemic control in obesity. On a high fat diet, obese SM/J mice initially develop impaired glucose tolerance and elevated fasting glucose. Strikingly, their glycemic dysfunction resolves by 30 weeks of age despite persistence of obesity. A prominent phenotype is that they dramatically expand their brown adipose depots as they resolve glycemic dysfunction. This occurs naturally and spontaneously on a high fat diet, with no temperature or genetic manipulation. When the brown adipose depot is removed from normoglycemic obese mice, fasting blood glucose and glucose tolerance revert to unhealthy levels, and animals become insulin resistant. We identified 267 genes whose expression changes in the brown adipose when the mice resolve their unhealthy glycemic parameters, and find the expanded tissue has a ‘healthier’ expression profile of cytokines and extracellular matrix genes. We describe morphological, physiological, and transcriptomic changes that occur during the unique brown adipose expansion and remission of glycemic dysfunction in obese SM/J mice. Understanding this phenomenon in mice will open the door for innovative therapies aimed at improving glycemic control in obesity. Significance Statement Some obese individuals maintain normal glycemic control. Despite being obese, these individuals have low risk for metabolic complications, including type-II diabetes. If we better understood why some obese people maintain normoglycemia then we might develop new approaches for treating metabolic complications associated with obesity. However, the causative factors underlying glycemic control in obesity remain unknown. We discovered that, despite persistence of the obese state, SM/J mice enter into diabetic remission: returning to normoglycemia and reestablishing glucose tolerance and improving insulin sensitivity. A prominent phenotype is that they dramatically expand their brown adipose depots as they resolve glycemic dysfunction. Understanding this phenomenon in mice will open the door for innovative therapies aimed at improving glycemic control in obesity." @default.
- W3103350139 created "2020-11-23" @default.
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- W3103350139 date "2019-08-05" @default.
- W3103350139 modified "2023-10-18" @default.
- W3103350139 title "Brown adipose expansion and remission of glycemic dysfunction in obese SM/J mice" @default.
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- W3103350139 doi "https://doi.org/10.1101/724369" @default.
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