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      Adipose vascular endothelial growth factor regulates metabolic homeostasis through angiogenesis.

      Cell Metabolism

      metabolism, genetics, Vascular Endothelial Growth Factor A, Signal Transduction, physiology, Neovascularization, Physiologic, Models, Animal, Mice, Transgenic, Mice, immunology, Macrophages, Insulin Resistance, pathology, Inflammation, Glucose Intolerance, pharmacology, Doxycycline, Diet, High-Fat, Apoptosis, Animals, drug effects, blood supply, Adipose Tissue, Adipokines

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          Abstract

          Vascular endothelial growth factor A (VEGF) is highly expressed in adipose tissue. Its role, however, has not been fully elucidated. Here, we reveal the metabolic role of adipose-VEGF by studying mice with deletion (VEGF(AdΔ)) or doxycycline-inducible overexpression of a VEGF transgene (VEGF(AdTg)) in the adipose tissue. VEGF(AdΔ) mice have reduced adipose vascular density and show adipose hypoxia, apoptosis, inflammation, and metabolic defects on a high-fat diet. In contrast, induction of VEGF expression in VEGF(AdTg) mice leads to increased adipose vasculature and reduced hypoxia. The latter changes are sufficient to counteract an established compromising effect of high-fat diet on the metabolism, indicating that metabolic misbalance is reversible by adipose vessel density increase. Our data clearly show the essential role of VEGF signaling for adequate adipose function. Besides revealing insights into the molecular mechanisms of obesity-related metabolic diseases, this study points to the therapeutic potential of increased adipose angiogenesis. Copyright © 2013 Elsevier Inc. All rights reserved.

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          Journal
          10.1016/j.cmet.2012.12.010
          23312284

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