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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zhu, Weidong Wang, Yu Li, Yixue Hui, Xiaoyan Wu, Donghai Xu, Aimin Zhang, Jialiang Kraegen, Edward W. Lam, Karen S. L. |
| Description | Author Affiliation: Hui X ( Key Laboratory of Systems Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai 200031, China.) |
| Abstract | Major urinary protein-1 (MUP-1) is a low molecular weight secreted protein produced predominantly from the liver. Structurally it belongs to the lipocalin family, which carries small hydrophobic ligands such as pheromones. However, the physiological functions of MUP-1 remain poorly understood. Here we provide evidence demonstrating that MUP-1 is an important player in regulating energy expenditure and metabolism in mice. Both microarray and real-time PCR analysis demonstrated that the MUP-1 mRNA abundance in the liver of db/db obese mice was reduced by approximately 30-fold compared with their lean littermates, whereas this change was partially reversed by treatment with the insulin-sensitizing drug rosiglitazone. In both dietary and genetic obese mice, the circulating concentrations of MUP-1 were markedly decreased compared with the lean controls. Chronic elevation of circulating MUP-1 in db/db mice, using an osmotic pump-based protein delivery system, increased energy expenditure and locomotor activity, raised core body temperature, and decreased glucose intolerance as well as insulin resistance. At the molecular level, MUP-1-mediated improvement in metabolic profiles was accompanied by increased expression of genes involved in mitochondrial biogenesis, elevated mitochondrial oxidative capacity, decreased triglyceride accumulation, and enhanced insulin-evoked Akt signaling in skeletal muscle but not in liver. Altogether, these findings raise the possibility that MUP-1 deficiency might contribute to the metabolic dysregulation in obese/diabetic mice, and suggest that the beneficial metabolic effects of MUP-1 are attributed in part to its ability in increasing mitochondrial function in skeletal muscle. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 21 |
| Volume Number | 284 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2009-05-22 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Diabetes Mellitus, Experimental Physiopathology Energy Metabolism Glucose Intolerance Mitochondria Metabolism Muscle, Skeletal Proteins Animals Complications Enzymology Dietary Fats Administration & Dosage Pharmacology Drug Effects Feeding Behavior Insulin Insulin Resistance Lipid Metabolism Liver Mice Mice, Inbred C57BL Mice, Obese Motor Activity Proto-Oncogene Proteins C-akt Recombinant Proteins Signal Transduction Thiazolidinediones Up-Regulation Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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