An Intestinal Farnesoid X Receptor–Ceramide Signaling Axis Modulates Hepatic Gluconeogenesis in Mice
| العنوان: | An Intestinal Farnesoid X Receptor–Ceramide Signaling Axis Modulates Hepatic Gluconeogenesis in Mice |
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| المؤلفون: | Jingmin Shi, Changtao Jiang, Ting Wang, Dong-Xue Sun, Mallappa Anitha, Cen Xie, Kristopher W. Krausz, Lulu Sun, Frank J. Gonzalez, Xiaoxia Gao, Shogo Takahashi, Andrew D. Patterson |
| المصدر: | Diabetes. 66:613-626 |
| بيانات النشر: | American Diabetes Association, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | 0301 basic medicine, medicine.medical_specialty, Ceramide, biology, Endocrinology, Diabetes and Metabolism, 030209 endocrinology & metabolism, Gut flora, Mitochondrion, biology.organism_classification, Pyruvate carboxylase, 03 medical and health sciences, Insulin receptor, chemistry.chemical_compound, 030104 developmental biology, 0302 clinical medicine, Endocrinology, chemistry, Internal medicine, Internal Medicine, biology.protein, medicine, Citrate synthase, Farnesoid X receptor, Caffeic acid phenethyl ester |
| الوصف: | Increasing evidence supports the view that intestinal farnesoid X receptor (FXR) is involved in glucose tolerance and that FXR signaling can be profoundly impacted by the gut microbiota. Selective manipulation of the gut microbiota–FXR signaling axis was reported to significantly impact glucose intolerance, but the precise molecular mechanism remains largely unknown. Here, caffeic acid phenethyl ester (CAPE), an over-the-counter dietary supplement and an inhibitor of bacterial bile salt hydrolase, increased levels of intestinal tauro-β-muricholic acid, which selectively suppresses intestinal FXR signaling. Intestinal FXR inhibition decreased ceramide levels by suppressing expression of genes involved in ceramide synthesis specifically in the intestinal ileum epithelial cells. The lower serum ceramides mediated decreased hepatic mitochondrial acetyl-CoA levels and pyruvate carboxylase (PC) activities and attenuated hepatic gluconeogenesis, independent of body weight change and hepatic insulin signaling in vivo; this was reversed by treatment of mice with ceramides or the FXR agonist GW4064. Ceramides substantially attenuated mitochondrial citrate synthase activities primarily through the induction of endoplasmic reticulum stress, which triggers increased hepatic mitochondrial acetyl-CoA levels and PC activities. These results reveal a mechanism by which the dietary supplement CAPE and intestinal FXR regulates hepatic gluconeogenesis and suggest that inhibiting intestinal FXR is a strategy for treating hyperglycemia. |
| تدمد: | 1939-327X 0012-1797 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::0cc30e6845e6a7ec616eb4257afb3118Test https://doi.org/10.2337/db16-0663Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........0cc30e6845e6a7ec616eb4257afb3118 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1939327X 00121797 |
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