title: Thrombospondin1 deficiency attenuates obesity-associated microvascular complications in ApoE-/- mice.
abstract: Obesity is associated with insulin resistance and the increased development of vascular complications. Previously, we have demonstrated that thrombospondin1 (TSP1) regulates macrophage function and contributes to obesity associated inflammation and insulin resistance. However, the role of TSP1 in the development of obesity associated vascular complications is not clear. Therefore, in the current study, we investigated whether TSP1 deficiency protects mice from obesity associated micro as well as macro-vascular complications in ApoE-/- mice. In this study, male ApoE-/- mice and ApoE-/-TSP1-/- mice were fed with a low-fat (LF) or a high-fat (HF) diet for 16 weeks. We found that body weight and fat mass increased similarly between the ApoE-/-TSP1-/- mice and ApoE-/- mice under HF feeding conditions. However, as compared to obese ApoE-/- mice, obese ApoE-/-TSP1-/- mice had improved glucose tolerance, increased insulin sensitivity, and reduced systemic inflammation. Aortic atherosclerotic lesion formation was similar in these two groups of mice. In contrast, albuminuria was attenuated and kidney fibrosis was reduced in obese ApoE-/-TSP1-/- mice compared to obese ApoE-/- mice. The improved kidney function in obese ApoE-/-TSP1-/- mice was associated with decreased renal lipid accumulation. Together, these data suggest that TSP1 deficiency did not affect the development of obesity associated macro-vascular complication, but attenuated obesity associated micro-vascular complications.
authors: Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, United States of America; Lexington Veterans Affairs Medical Center, Lexington, Kentucky, United States of America.
authors: Hasiyeti
authors: H
authors: Maimaitiyiming
authors: Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, United States of America; Lexington Veterans Affairs Medical Center, Lexington, Kentucky, United States of America.
authors: Kate
authors: K
authors: Clemons
authors: Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, United States of America; Lexington Veterans Affairs Medical Center, Lexington, Kentucky, United States of America.
authors: Qi
authors: Q
authors: Zhou
authors: Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, United States of America; Lexington Veterans Affairs Medical Center, Lexington, Kentucky, United States of America.
authors: Heather
authors: H
authors: Norman
authors: Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, United States of America; Lexington Veterans Affairs Medical Center, Lexington, Kentucky, United States of America.
authors: Shuxia
authors: S
authors: Wang
mesh_terms: D000818:Animals; D001057:Apolipoproteins E / Q000235:genetics*; D059305:Diet, High-Fat; D004195:Disease Models, Animal; D007249:Inflammation / Q000209:etiology; D007333:Insulin Resistance; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D008820:Mice, Obese; D055806:Microvessels; D009765:Obesity / Q000150:complications*; D019700:Thrombospondin 1 / Q000235:genetics*; D014652:Vascular Diseases / Q000209:etiology* / Q000378:metabolism
chemical_list: D001057:Apolipoproteins E; D019700:Thrombospondin 1; C585483:Thbs1 protein, mouse