Abstract
Lipids are the most energy-dense components of the diet, and their overconsumption promotes obesity and diabetes. Dietary fat content has been linked to the lipid processing activity by the intestine and its overall capacity to absorb triglycerides (TG). However, the signaling cascades driving intestinal lipid absorption in response to elevated dietary fat are largely unknown. Here, we describe an unexpected role of the protein kinase D2 (PKD2) in lipid homeostasis. We demonstrate that PKD2 activity promotes chylomicron-mediated TG transfer in enterocytes. PKD2 increases chylomicron size to enhance the TG secretion on the basolateral side of the mouse and human enterocytes, which is associated with decreased abundance of APOA4. PKD2 activation in intestine also correlates positively with circulating TG in obese human patients. Importantly, deletion, inactivation, or inhibition of PKD2 ameliorates high-fat diet-induced obesity and diabetes and improves gut microbiota profile in mice. Taken together, our findings suggest that PKD2 represents a key signaling node promoting dietary fat absorption and may serve as an attractive target for the treatment of obesity.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | e13548 |
| Tidsskrift | EMBO Molecular Medicine |
| Vol/bind | 13 |
| Udgave nummer | 5 |
| ISSN | 1757-4676 |
| DOI | |
| Status | Udgivet - 7. maj 2021 |
| Udgivet eksternt | Ja |
Bibliografisk note
Publisher Copyright:© 2021 The Authors. Published under the terms of the CC BY 4.0 license
Finansiering
We thank Dr. Annette Schuermann for help with experimental procedures and for the critical reading of the manuscript. We thank Prof. Dr. C. Stigloher, Claudia Gehrig-Höhn, and the Imaging Core Facility of Biocenter of the University of Würzburg for help with the electron microscopy experiments. We are grateful to Caroline Ziegler, PD Dr. Klaus Neuhaus, and Dr. Ilias Lagkouvardos from the ZIEL Core Facility Microbiome/NGS at the Technical University of Munich for the outstanding technical assistance with sample processing for high-throughput 16S rRNA gene amplicon sequencing and for the help with statistical analysis. Dr. Olga Sumara and Dr. Izabela Sumara for comments on the manuscript. This study was funded by European Research Council (ERC) Starting Grant SicMetabol (no. 678119), Emmy Noether Grant Su 820/1-1 from the German Research Foundation (DFG), EMBO Installation Grant from European Molecular Biology Organization (EMBO), the Dioscuri Centre of Scientific Excellence—The program initiated by the Max Planck Society (MPG), managed jointly with the National Science Centre, and mutually funded by the Ministry of Science and Higher Education (MNiSW) and the German Federal Ministry of Education and Research (BMBF), and Collaborative Research Centre 1371 (CRC) Microbiome Signatures—Functional Relevance in the Digestive Tract funded by the German Research Foundation (DFG). We would like to thank Servier Medical Art by Servier (smart.servier.com) for sharing free images under a Creative Commons Attribution 3.0 Unported License. Some elements from smart.servier.com were used for creating the figures. Open Access funding enabled and organized by ProjektDEAL. We thank Dr. Annette Schuermann for help with experimental procedures and for the critical reading of the manuscript. We thank Prof. Dr. C. Stigloher, Claudia Gehrig‐Höhn, and the Imaging Core Facility of Biocenter of the University of Würzburg for help with the electron microscopy experiments. We are grateful to Caroline Ziegler, PD Dr. Klaus Neuhaus, and Dr. Ilias Lagkouvardos from the ZIEL Core Facility Microbiome/NGS at the Technical University of Munich for the outstanding technical assistance with sample processing for high‐throughput 16S rRNA gene amplicon sequencing and for the help with statistical analysis. Dr. Olga Sumara and Dr. Izabela Sumara for comments on the manuscript. This study was funded by European Research Council (ERC) Starting Grant SicMetabol (no. 678119), Emmy Noether Grant Su 820/1‐1 from the German Research Foundation (DFG), EMBO Installation Grant from European Molecular Biology Organization (EMBO), the Dioscuri Centre of Scientific Excellence—The program initiated by the Max Planck Society (MPG), managed jointly with the National Science Centre, and mutually funded by the Ministry of Science and Higher Education (MNiSW) and the German Federal Ministry of Education and Research (BMBF), and Collaborative Research Centre 1371 (CRC) Microbiome Signatures—Functional Relevance in the Digestive Tract funded by the German Research Foundation (DFG). We would like to thank Servier Medical Art by Servier ( smart.servier.com ) for sharing free images under a Creative Commons Attribution 3.0 Unported License. Some elements from smart.servier.com were used for creating the figures. Open Access funding enabled and organized by ProjektDEAL.
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