Browsing by Author "Paski, Shirley C."

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    Gastrokine-1, an anti-amyloidogenic protein secreted by the stomach, regulates diet-induced obesity
    (Springer Nature, 2021-05-04) Overstreet, Anne-Marie C.; Grayson, Bernadette E.; Boger, Antonia; Bakke, Danika; Carmody, Erin M.; Bales, Cayla E.; Paski, Shirley C.; Murphy, Stephen F.; Dethlefs, Christopher R.; Shannon, Kara J.; Adlaka, Katie R.; Wolford, Claire E.; Campiti, Vincent J.; Raghunandan, Christina V.; Seeley, Randy J.; Boone, David L.; Microbiology and Immunology, School of Medicine
    Obesity and its sequelae have a major impact on human health. The stomach contributes to obesity in ways that extend beyond its role in digestion, including through effects on the microbiome. Gastrokine-1 (GKN1) is an anti-amyloidogenic protein abundantly and specifically secreted into the stomach lumen. We examined whether GKN1 plays a role in the development of obesity and regulation of the gut microbiome. Gkn1−/− mice were resistant to diet-induced obesity and hepatic steatosis (high fat diet (HFD) fat mass (g) = 10.4 ± 3.0 (WT) versus 2.9 ± 2.3 (Gkn1−/−) p < 0.005; HFD liver mass (g) = 1.3 ± 0.11 (WT) versus 1.1 ± 0.07 (Gkn1−/−) p < 0.05). Gkn1−/− mice also exhibited increased expression of the lipid-regulating hormone ANGPTL4 in the small bowel. The microbiome of Gkn1−/− mice exhibited reduced populations of microbes implicated in obesity, namely Firmicutes of the class Erysipelotrichia. Altered metabolism consistent with use of fat as an energy source was evident in Gkn1−/− mice during the sleep period. GKN1 may contribute to the effects of the stomach on the microbiome and obesity. Inhibition of GKN1 may be a means to prevent obesity.