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Hua L, Li J, Feng B, Jiang D, Jiang X, Luo T, Che L, Xu S, Lin Y, Fang Z, Wu D, Zhuo Y. Dietary Intake Regulates White Adipose Tissues Angiogenesis via Liver Fibroblast Growth Factor 21 in Male Mice. Endocrinology 2021; 162:6054191. [PMID: 33369618 PMCID: PMC7814301 DOI: 10.1210/endocr/bqaa244] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Indexed: 11/19/2022]
Abstract
Obesity and related metabolic disorders have become epidemic diseases. Intermittent fasting has been shown to promote adipose tissue angiogenesis and have an anti-obesity feature; however, the mechanisms of how intermittent fasting modulates adipose tissues angiogenesis are poorly understood. We investigated the effect of fasting on vascular endothelial growth factor (VEGF) levels in white adipose tissues (WAT) and the function of fibroblast growth factor 21 (FGF21) in 1-time fasting and long-term intermittent fasting-induced VEGF expression. In the current study, fasting induced a selective and drastic elevation of VEGF levels in WAT, which did not occur in interscapular brown adipose tissue and liver. The fasting-induced Vegfa expression occurred predominantly in mature adipocytes, but not in the stromal vascular fraction in epididymal WAT and inguinal WAT (iWAT). Furthermore, a single bolus of recombinant mouse FGF21 injection increased VEGF levels in WAT. Long-term intermittent fasting for 16 weeks increased WAT angiogenesis, iWAT browning, and improved insulin resistance and inflammation, but the effect was blunted in FGF21 liver-specific knockout mice. In summary, these data suggest that FGF21 is a potent regulator of VEGF levels in WAT. The interorgan FGF21 signaling-induced WAT angiogenesis by VEGF could be a potential new therapeutic target in combination with obesity-related metabolic disorders.
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Affiliation(s)
- Lun Hua
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Jing Li
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Bin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Dandan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xuemei Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Ting Luo
- Department of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Lianqiang Che
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Shengyu Xu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Yan Lin
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Zhengfeng Fang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - De Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Correspondence: Yong Zhuo, 211 Huimin Road, Wenjiang District, Chengdu, PR China, 611130. ; De Wu, 211 Huimin Road, Wenjiang District, Chengdu, PR China, 611130.
| | - Yong Zhuo
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease-Resistant Nutrition of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Correspondence: Yong Zhuo, 211 Huimin Road, Wenjiang District, Chengdu, PR China, 611130. ; De Wu, 211 Huimin Road, Wenjiang District, Chengdu, PR China, 611130.
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Loustau T, Coudiere E, Karkeni E, Landrier JF, Jover B, Riva C. Murine double minute-2 mediates exercise-induced angiogenesis in adipose tissue of diet-induced obese mice. Microvasc Res 2020; 130:104003. [PMID: 32199946 DOI: 10.1016/j.mvr.2020.104003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 02/06/2020] [Accepted: 03/16/2020] [Indexed: 12/20/2022]
Abstract
OBJECTIVE This study aimed to determine the effects of physical exercise on the angio-adaptive response in adipose tissue following weight loss in a mouse model of diet-induced obesity. We hypothesized that physical exercise stimulates angiogenesis through the regulation of Vascular endothelial growth factor-A (VEGF-A) pro-/Thrombospondin-1 (TSP-1) anti-angiogenic signal under the control of the Murine double-minute 2/Forkhead box Os (Mdm2/FoxOs) axis, as reported in skeletal muscle. METHODS We studied the effects of 7 weeks-voluntary exercise (Ex) in C57Bl/6 control or diet-induced obese (HFS) mice on vascularization of white adipose tissue (AT). RESULTS Diet-induced obese sedentary (HFSsed) mice presented a powerful angiostatic control in all adipose tissues, under FoxOs protein regulation, leading to capillary rarefaction. Exercise increased expression of Mdm2, repressing the angiostatic control in favor of adipose vascular regrowth in normal chow (NCex) and HFSex mice. This phenomenon was associated with adipocytes microenvironment improvement, such as decreased adipocytes hypertrophy and adipose tissue inflammation. In addition, adipose angiogenesis stimulation by exercise through Mdm2 pro-angiogenic action, improved visceral adipose insulin sensitivity, activated browning process within subcutaneous adipose tissue (ScWAT) and decreased ectopic fat deposition (muscle, heart and liver) in obese HFSex mice. The overall result of this approach of therapy by physical exercise is an improvement of all systemic cardiometabolic parameters. CONCLUSIONS These data demonstrated the therapeutic efficacy of physical exercise against obesity-associated pathologies, and also offer new prospects for molecular therapies targeting the adipose angio-adaptation in obese humans.
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MESH Headings
- Adipocytes, Brown/metabolism
- Adipocytes, Brown/pathology
- Adipocytes, White/metabolism
- Adipocytes, White/pathology
- Adipose Tissue, White/blood supply
- Adipose Tissue, White/metabolism
- Adipose Tissue, White/pathology
- Animals
- Cellular Microenvironment
- Diet, High-Fat
- Disease Models, Animal
- Exercise Therapy
- Forkhead Box Protein O1/metabolism
- Forkhead Box Protein O3/metabolism
- Male
- Mice, Inbred C57BL
- Neovascularization, Physiologic
- Obesity/metabolism
- Obesity/pathology
- Obesity/physiopathology
- Obesity/therapy
- Proto-Oncogene Proteins c-mdm2/metabolism
- Signal Transduction
- Thrombospondin 1/metabolism
- Tissue Culture Techniques
- Vascular Endothelial Growth Factor A/metabolism
- Weight Loss
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Affiliation(s)
- Thomas Loustau
- LAPEC EA-4278, Avignon Université, 84000 Avignon, France
| | | | - Esma Karkeni
- C2VN, Aix-Marseille Université, INRA, INSERM, 13000 Marseille, France
| | | | - Bernard Jover
- PhyMedExp, INSERM, CNRS, Montpellier University, Montpellier, France
| | - Catherine Riva
- LAPEC EA-4278, Avignon Université, 84000 Avignon, France.
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Culum AA, Yurekli M. Adrenomedullin has a role in angiogenic effects of resveratrol in adipose tissues of obese female rats. Mol Biol Rep 2020; 47:1667-1680. [PMID: 31933262 DOI: 10.1007/s11033-020-05256-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 01/08/2020] [Indexed: 11/26/2022]
Abstract
Obesity is a complex, chronic disease that arises according to the interaction between genetic and environmental factors. The expansion and growth of white adipose tissue (WAT) could be related to angiogenesis. Resveratrol and adrenomedullin (AdM) were used for the inhibition of angiogenesis in metabolically passive WAT for inhibiting the expansion of this tissue, and the activation of angiogenesis in metabolically active brown adipose tissue (BAT) for increasing daily energy consumption as a way of reducing obesity. Rats were divided into eight groups. Four obese groups were fed with a high-fat diet containing 60% fat as energy for three months. After obtaining obesity, 2.5 nmol/kg AdM and 10 mg/kg resveratrol were treated to experiment groups intraperitoneally (i.p.) every other day for four weeks. AdM and vascular endothelial growth factor A (VEGF-A) mRNA levels were detected with semi-quantitative PCR; protein levels were detected with Western Blotting. AdM and resveratrol are multifactorial molecules, thus, this study has revealed a few novel evidence. The results were distinct in the group and treatment levels. The results showed that resveratrol has a role in angiogenesis in obesity and contributed to AdM production. It is observed that AdM has regulated its expression and increased the effect of resveratrol in WAT. AdM and VEGF-A gene expressions could not be detected in BAT; however, it is suggested that resveratrol may have a pro-angiogenic effect in BAT of obese rats according to the protein levels. AdM also has regulated VEGF-A level according to the metabolic situation of the organism.
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Affiliation(s)
- Ayse Asiye Culum
- Department of Biology, The Faculty of Science and Literature, Inonu University, Malatya, Turkey.
| | - Muhittin Yurekli
- Department of Biology, The Faculty of Science and Literature, Inonu University, Malatya, Turkey
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Zhang WX, Chen HJ, Fan J, Li GL, Sun A, Lan LY, Zhang L, Yan YE. The association between maternal nicotine exposure and adipose angiogenesis in female rat offspring: A mechanism of adipose tissue function changes. Toxicol Lett 2019; 318:12-21. [PMID: 31622651 DOI: 10.1016/j.toxlet.2019.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/04/2019] [Accepted: 10/12/2019] [Indexed: 02/08/2023]
Abstract
Maternal smoking during pregnancy and lactation is associated with increased fat mass in the offspring, but the mechanism by which this occurs is not fully understood. Our study focused on the relationships among maternal nicotine exposure, adipose angiogenesis and adipose tissue function in female offspring. Pregnant rats were randomly assigned to nicotine or control groups. Microvascular density, lipid metabolism and α7nAChR-Egr1-FGF2 signaling pathway genes/proteins were tested in 4-, 12- and 26-week female offspring. In vitro, nicotine concentration- and time-response experiments were conducted in 3T3-L1. Lipid metabolism and α7nAChR-Egr1-FGF2 signaling pathway genes/proteins were tested. The conditioned media of differentiated 3T3-L1 treated with nicotine were used to observe tube formation in human umbilical vein endothelial cells (HUVECs). Nicotine-exposed females presented higher adipose microvascular density. The gene expression of α7nAChR, Egr1 and FGF2 was significantly increased in gonadal white adipose tissue (gWAT) and inguinal subcutaneous WAT (igSWAT) of nicotine-exposed females at 4 weeks of age. The protein expression of α7nAChR, Egr1 and FGF2 was increased in gWAT and igSWAT of nicotine-exposed females at 4 weeks of age, and increased in gWAT at 26 weeks. In vitro, nicotine increased the expression of lipid metabolism and α7nAChR-Egr1-FGF2 signaling pathway genes/proteins in a concentration- and time-dependent manner. In the tube formation experiment, adipocytes affected by nicotine promoted HUVEC angiogenesis. Therefore, maternal nicotine exposure promoted the early angiogenesis of adipose tissue via the α7nAChR-Egr1-FGF2 signaling pathway, and this angiogenesis mechanism was associated with increased adipogenesis in adipose tissue of female offspring.
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Affiliation(s)
- Wan-Xia Zhang
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Hui-Jian Chen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Jie Fan
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Gai-Ling Li
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Ao Sun
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Liu-Yi Lan
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Li Zhang
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - You-E Yan
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China.
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Xian Y, Chen Z, Deng H, Cai M, Liang H, Xu W, Weng J, Xu F. Exenatide mitigates inflammation and hypoxia along with improved angiogenesis in obese fat tissue. J Endocrinol 2019; 242:79-89. [PMID: 31137012 DOI: 10.1530/joe-18-0639] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 05/28/2019] [Indexed: 11/08/2022]
Abstract
Obesity-associated chronic inflammation in adipose tissue is partly attributed to hypoxia with insufficient microcirculation. Previous studies have shown that exenatide, a glucagon-like peptide 1 (GLP-1) receptor agonist, plays an anti-inflammatory role. Here, we investigate its effects on inflammation, hypoxia and microcirculation in white adipose tissue of diet-induced obese (DIO) mice. DIO mice were injected intraperitoneally with exenatide or normal saline for 4 weeks, while mice on chow diet were used as normal controls. The mRNA and protein levels of pro-inflammatory cytokines, hypoxia-induced genes and angiogenic factors were detected. Capillary density was measured by laser confocal microscopy and immunochemistry staining. After 4-week exenatide administration, the dramatically elevated pro-inflammatory cytokines in serum and adipose tissue and macrophage infiltration in adipose tissue of DIO mice were significantly reduced. Exenatide also ameliorated expressions of hypoxia-related genes in obese fat tissue. Protein levels of endothelial markers and pro-angiogenic factors including vascular endothelial growth factor and its receptor 2 were augmented in accordance with increased capillary density by exenatide in DIO mice. Our results indicate that inflammation and hypoxia in adipose tissue can be mitigated by GLP-1 receptor agonist potentially via improved angiogenesis and microcirculation in obesity.
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Affiliation(s)
- Yingxin Xian
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
| | - Zonglan Chen
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
| | - Hongrong Deng
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
| | - Mengyin Cai
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
| | - Hua Liang
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
| | - Wen Xu
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
| | - Jianping Weng
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
| | - Fen Xu
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
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Cao Y, Wang H, Wang Q, Han X, Zeng W. Three-dimensional volume fluorescence-imaging of vascular plasticity in adipose tissues. Mol Metab 2018; 14:71-81. [PMID: 29914852 PMCID: PMC6034070 DOI: 10.1016/j.molmet.2018.06.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/16/2018] [Accepted: 06/02/2018] [Indexed: 01/16/2023] Open
Abstract
Objective The vascular system is central to sustaining tissue survival and homeostasis. Blood vessels are densely present in adipose tissues and exert essential roles in their metabolism. However, conventional immunohistochemistry methods have intrinsic limitations in examining the 3D vascular network in adipose tissues as well as other organs in general. Methods We established a 3D volume fluorescence-imaging technique to visualize the vasculatures in mouse adipose tissues by combining the optimized steps of whole-mount immunolabeling, tissue optical clearing, and lightsheet volume fluorescence-imaging. To demonstrate the strength of this novel imaging procedure, we comprehensively assessed the intra-adipose vasculatures under obese conditions or in response to a cold challenge. Results We show the entirety of the vascular network in mouse adipose tissues on the whole-tissue level at a single-capillary resolution for the first time in the field. We accurately quantify the pathological changes of vasculatures in adipose tissues in wild-type or obese mice (ob/ob, db/db, or diet-induced obesity). In addition, we identify significant and reversible changes of the intra-adipose vasculatures in the mice subjected to cold challenge (i.e., 4°). Furthermore, we demonstrate that the cold-induced vascular plasticity depends on the sympathetic-derived catecholamine signal and is involved in the beiging process of white adipose tissues. Conclusions We report a 3D volume fluorescence-imaging procedure that is compatible with many areas of vascular research and is poised to serve the field in future investigations of the vascular system in adipose tissues or other research scenarios. 3D vascular network in adipose tissues is visualized at single-capillary resolution. Pathological remodeling of vasculatures is characterized under the obese conditions. Vascular plasticity during cold challenge is involved in the beiging process of WAT. Sympathetic-derived catecholamine signal regulates the vascular plasticity in WAT.
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Affiliation(s)
- Ying Cao
- Center for Life Sciences, Tsinghua University, Beijing, 100084, China; Academy for Advanced Interdisciplinary Studies, Peking University, 100871, Beijing, China
| | - Huanhuan Wang
- School of Life Sciences, Peking University, Beijing, 100871, China
| | - Qi Wang
- Center for Life Sciences, Tsinghua University, Beijing, 100084, China; Academy for Advanced Interdisciplinary Studies, Peking University, 100871, Beijing, China
| | - Xiangli Han
- School of Life Sciences, Peking University, Beijing, 100871, China
| | - Wenwen Zeng
- Center for Life Sciences, Tsinghua University, Beijing, 100084, China; Institute for Immunology and School of Medicine, Tsinghua University, Beijing, 100084, China; Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, 100084, China.
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Park J, Kim M, Sun K, An YA, Gu X, Scherer PE. VEGF-A-Expressing Adipose Tissue Shows Rapid Beiging and Enhanced Survival After Transplantation and Confers IL-4-Independent Metabolic Improvements. Diabetes 2017; 66:1479-1490. [PMID: 28254844 PMCID: PMC5440018 DOI: 10.2337/db16-1081] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 02/23/2017] [Indexed: 01/01/2023]
Abstract
Adipocyte-derived vascular endothelial growth factor-A (VEGF-A) plays a crucial role in angiogenesis and contributes to adipocyte function and systemic metabolism, such as insulin resistance, chronic inflammation, and beiging of subcutaneous adipose tissue. Using a doxycycline-inducible adipocyte-specific VEGF-A-overexpressing mouse model, we investigated the dynamics of local VEGF-A effects on tissue beiging of adipose tissue transplants. VEGF-A overexpression in adipocytes triggers angiogenesis. We also observed a rapid appearance of beige fat cells in subcutaneous white adipose tissue as early as 2 days postinduction of VEGF-A. In contrast to conventional cold-induced beiging, VEGF-A-induced beiging is independent of interleukin-4. We subjected metabolically healthy VEGF-A-overexpressing adipose tissue to autologous transplantation. Transfer of subcutaneous adipose tissues taken from VEGF-A-overexpressing mice into diet-induced obese mice resulted in systemic metabolic benefits, associated with improved survival of adipocytes and a concomitant reduced inflammatory response. These effects of VEGF-A are tissue autonomous, inducing white adipose tissue beiging and angiogenesis within the transplanted tissue. Our findings indicate that manipulation of adipocyte functions with a bona fide angiogenic factor, such as VEGF-A, significantly improves the survival and volume retention of fat grafts and can convey metabolically favorable properties on the recipient on the basis of beiging.
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Affiliation(s)
- Jiyoung Park
- Department of Internal Medicine, Touchstone Diabetes Center, University of Texas Southwestern Medical Center, Dallas, TX
- Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan, South Korea
| | - Min Kim
- Department of Internal Medicine, Touchstone Diabetes Center, University of Texas Southwestern Medical Center, Dallas, TX
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Inje University, and Cardiovascular and Metabolic Disease Center, Inje University, Busanjin-gu, Busan, South Korea
| | - Kai Sun
- Department of Internal Medicine, Touchstone Diabetes Center, University of Texas Southwestern Medical Center, Dallas, TX
- Center for Metabolic and Degenerative Diseases, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, University of Texas Health Science Center at Houston, Houston, TX
| | - Yu Aaron An
- Department of Internal Medicine, Touchstone Diabetes Center, University of Texas Southwestern Medical Center, Dallas, TX
| | - Xue Gu
- Center for Metabolic and Degenerative Diseases, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, University of Texas Health Science Center at Houston, Houston, TX
| | - Philipp E Scherer
- Department of Internal Medicine, Touchstone Diabetes Center, University of Texas Southwestern Medical Center, Dallas, TX
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX
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Onogi Y, Wada T, Kamiya C, Inata K, Matsuzawa T, Inaba Y, Kimura K, Inoue H, Yamamoto S, Ishii Y, Koya D, Tsuneki H, Sasahara M, Sasaoka T. PDGFRβ Regulates Adipose Tissue Expansion and Glucose Metabolism via Vascular Remodeling in Diet-Induced Obesity. Diabetes 2017; 66:1008-1021. [PMID: 28122789 DOI: 10.2337/db16-0881] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 01/17/2017] [Indexed: 11/13/2022]
Abstract
Platelet-derived growth factor (PDGF) is a key factor in angiogenesis; however, its role in adult obesity remains unclear. In order to clarify its pathophysiological role, we investigated the significance of PDGF receptor β (PDGFRβ) in adipose tissue expansion and glucose metabolism. Mature vessels in the epididymal white adipose tissue (eWAT) were tightly wrapped with pericytes in normal mice. Pericyte desorption from vessels and the subsequent proliferation of endothelial cells were markedly increased in the eWAT of diet-induced obese mice. Analyses with flow cytometry and adipose tissue cultures indicated that PDGF-B caused the detachment of pericytes from vessels in a concentration-dependent manner. M1-macrophages were a major type of cells expressing PDGF-B in obese adipose tissue. In contrast, pericyte detachment was attenuated and vascularity within eWAT was reduced in tamoxifen-inducible conditional Pdgfrb-knockout mice with decreases in adipocyte size and chronic inflammation. Furthermore, Pdgfrb-knockout mice showed enhanced energy expenditure. Consequently, diet-induced obesity and the associated deterioration of glucose metabolism in wild-type mice were absent in Pdgfrb-knockout mice. Therefore, PDGF-B-PDGFRβ signaling plays a significant role in the development of adipose tissue neovascularization and appears to be a fundamental target for the prevention of obesity and type 2 diabetes.
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Affiliation(s)
- Yasuhiro Onogi
- Department of Clinical Pharmacology, University of Toyama, Toyama, Japan
| | - Tsutomu Wada
- Department of Clinical Pharmacology, University of Toyama, Toyama, Japan
| | - Chie Kamiya
- Department of Clinical Pharmacology, University of Toyama, Toyama, Japan
| | - Kento Inata
- Department of Clinical Pharmacology, University of Toyama, Toyama, Japan
| | | | - Yuka Inaba
- Department of Physiology and Metabolism, Brain/Liver Interface Medicine Research Center, Institute for Frontier Science Initiative, Kanazawa University, Ishikawa, Japan
- Metabolism and Nutrition Research Unit, Innovative Integrated Bio-Research Core, Institute for Frontier Science Initiative, Kanazawa University, Ishikawa, Japan
| | - Kumi Kimura
- Department of Physiology and Metabolism, Brain/Liver Interface Medicine Research Center, Institute for Frontier Science Initiative, Kanazawa University, Ishikawa, Japan
| | - Hiroshi Inoue
- Department of Physiology and Metabolism, Brain/Liver Interface Medicine Research Center, Institute for Frontier Science Initiative, Kanazawa University, Ishikawa, Japan
- Metabolism and Nutrition Research Unit, Innovative Integrated Bio-Research Core, Institute for Frontier Science Initiative, Kanazawa University, Ishikawa, Japan
| | - Seiji Yamamoto
- Department of Pathology, University of Toyama, Toyama, Japan
| | - Yoko Ishii
- Department of Pathology, University of Toyama, Toyama, Japan
| | - Daisuke Koya
- Department of Internal Medicine, Kanazawa Medical University, Ishikawa, Japan
| | - Hiroshi Tsuneki
- Department of Clinical Pharmacology, University of Toyama, Toyama, Japan
| | | | - Toshiyasu Sasaoka
- Department of Clinical Pharmacology, University of Toyama, Toyama, Japan
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Abstract
Systemic inflammation resulting from dysfunction of white adipose tissue (WAT) accelerates the pathologies of diabetes and cardiovascular diseases. In contrast to WAT, brown adipose tissue (BAT) is abundant in mitochondria that produce heat by uncoupling respiratory chain process of ATP synthesis. Besides BAT's role in thermogenesis, accumulating evidence has shown that it is involved in regulating systemic metabolism. Studies have analyzed the "browning" processes of WAT as a means to combat obesity, whereas few studies have focused on the impact and molecular mechanisms that contribute to obesity-linked BAT dysfunction--a process that is associated with the "whitening" of this tissue. Compared to WAT, a dense vascular network is required to support the high energy consumption of BAT. Recently, vascular rarefaction was shown to be a significant causal factor in the whitening of BAT in mouse models. Vascular insufficiency leads to mitochondrial dysfunction and loss in BAT and contributes to systemic insulin resistance. These data suggest that BAT "whitening," resulting from vascular dysfunction, can impact obesity and obesity-linked diseases. Conversely, agents that promote BAT function could have utility in the treatment of these conditions.
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Affiliation(s)
- Ippei Shimizu
- Department of Cardiovascular Biology and Medicine, Division of Molecular Aging and Cell Biology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, 951-8510, Japan.
| | - Kenneth Walsh
- Molecular Cardiology and Whitaker Cardiovascular Institute, Boston University School of Medicine, 715 Albany Street, W611, Boston, MA, 02118, USA
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Honek J, Lim S, Fischer C, Iwamoto H, Seki T, Cao Y. Brown adipose tissue, thermogenesis, angiogenesis: pathophysiological aspects. Horm Mol Biol Clin Investig 2015; 19:5-11. [PMID: 25390012 DOI: 10.1515/hmbci-2014-0014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Accepted: 04/22/2014] [Indexed: 01/16/2023]
Abstract
The number of obese and overweight individuals is globally rising, and obesity-associated disorders such as type 2 diabetes, cardiovascular disease and certain types of cancer are among the most common causes of death. While white adipose tissue is the key player in the storage of energy, active brown adipose tissue expends energy due to its thermogenic capacity. Expanding and activating brown adipose tissue using pharmacological approaches therefore might offer an attractive possibility for therapeutic intervention to counteract obesity and its consequences for metabolic health.
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MESH Headings
- Adipose Tissue, Brown/blood supply
- Adipose Tissue, Brown/metabolism
- Adipose Tissue, Brown/physiopathology
- Adipose Tissue, White/blood supply
- Adipose Tissue, White/metabolism
- Adipose Tissue, White/physiopathology
- Animals
- Cardiovascular Diseases/metabolism
- Cardiovascular Diseases/physiopathology
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/physiopathology
- Humans
- Ion Channels/metabolism
- Mitochondrial Proteins/metabolism
- Neovascularization, Physiologic
- Obesity/metabolism
- Obesity/physiopathology
- Receptors, Adrenergic, beta/metabolism
- Signal Transduction
- Thermogenesis/physiology
- Uncoupling Protein 1
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11
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Lakeland TV, Borg ML, Matzaris M, Abdelkader A, Evans RG, Watt MJ. Augmented expression and secretion of adipose-derived pigment epithelium-derived factor does not alter local angiogenesis or contribute to the development of systemic metabolic derangements. Am J Physiol Endocrinol Metab 2014; 306:E1367-77. [PMID: 24760990 DOI: 10.1152/ajpendo.00046.2014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Impaired coupling of adipose tissue expansion and vascularization is proposed to lead to adipocyte hypoxia and inflammation, which in turn contributes to systemic metabolic derangements. Pigment epithelium-derived factor (PEDF) is a powerful antiangiogenic factor that is secreted by adipocytes, elevated in obesity, and implicated in the development of insulin resistance. We explored the angiogenic and metabolic role of adipose-derived PEDF through in vivo studies of mice with overexpression of PEDF in adipocytes (PEDF-aP2). PEDF expression in white adipocytes and PEDF secretion from adipose tissue was increased in transgenic mice, but circulating levels of PEDF were not increased. Overexpression of PEDF did not alter vascularization, the partial pressure of O2, cellular hypoxia, or gene expression of inflammatory markers in adipose tissue. Energy expenditure and metabolic substrate utilization, body mass, and adiposity were not altered in PEDF-aP2 mice. Whole body glycemic control was normal as assessed by glucose and insulin tolerance tests, and adipocyte-specific glucose uptake was unaffected by PEDF overexpression. Adipocyte lipolysis was increased in PEDF-aP2 mice and associated with increased adipose triglyceride lipase and decreased perilipin 1 expression. Experiments conducted in mice rendered obese by high-fat feeding showed no differences between PEDF-aP2 and wild-type mice for body mass, adiposity, whole body energy expenditure, glucose tolerance, or adipose tissue oxygenation. Together, these data indicate that adipocyte-generated PEDF enhances lipolysis but question the role of PEDF as a major antiangiogenic or proinflammatory mediator in adipose tissue in vivo.
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Affiliation(s)
- Thomas V Lakeland
- Biology of Lipid Metabolism Laboratory, Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Melissa L Borg
- Biology of Lipid Metabolism Laboratory, Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Maria Matzaris
- Biology of Lipid Metabolism Laboratory, Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Amany Abdelkader
- Biology of Lipid Metabolism Laboratory, Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Roger G Evans
- Biology of Lipid Metabolism Laboratory, Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Matthew J Watt
- Biology of Lipid Metabolism Laboratory, Department of Physiology, Monash University, Clayton, Victoria, Australia
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12
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Aprahamian TR. Elevated adiponectin expression promotes adipose tissue vascularity under conditions of diet-induced obesity. Metabolism 2013; 62:1730-8. [PMID: 23993424 PMCID: PMC3834157 DOI: 10.1016/j.metabol.2013.07.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 07/22/2013] [Accepted: 07/23/2013] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Despite the clinical prevalence of obesity, only recently has the importance of adipose tissue microenvironment been addressed at a molecular level. Here, I focused on the fat-derived cytokine adiponectin as a model system to understand the mechanism underlying adipose tissue vascularity, perfusion, inflammation, and systemic metabolic function. MATERIALS/METHODS Wild type, adiponectin-deficient, and adiponectin transgenic-overexpressing mice were maintained on chow diet or high fat/high sucrose diet for 32weeks. Vascularization of adipose tissue was examined by confocal microscopy and perfusion was determined by recovery of injected microspheres. Adipose tissue inflammation and systemic metabolic function were also assessed. RESULTS Modest over-expression of adiponectin led to a marked increase in adipose tissue vascularity and perfusion, and this was associated with diminished hypoxia and an increase in vascular endothelial growth factor-A (VEGF-A) expression in the obese mice. Adiponectin over-expression in diet-induced obese mice also led to the virtual absence of macrophage infiltration and the elimination of crown-like structures. Adiponectin transgenic mice also displayed a remarkable sensitivity to insulin and diminished hepatic steatosis. Under the conditions of these experiments, adiponectin deficiency did not diminish adipose tissue perfusion or worsen metabolic function compared to wild type mice fed the high fat/high sucrose diet. CONCLUSION These data demonstrate that increased circulating adiponectin levels, and the obese environment, are associated with increased adipose tissue vascularization and perfusion, and improved metabolic function under conditions of long term diet-induced obesity.
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Affiliation(s)
- Tamar R Aprahamian
- Department of Medicine-Renal Section, Boston University School of Medicine, 650 Albany Street, X536, Boston, MA 02118, USA.
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13
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Abstract
The growing prevalence of obesity and diabetes necessitate a better understanding of the role of adipocyte biology in metabolism. Increasingly, erythropoietin (EPO) has been shown to have extraerythropoietic and cytoprotective roles. Exogenous administration has recently been shown to have beneficial effects on obesity and diabetes in mouse models and EPO can modulate adipogenesis and insulin signaling in 3T3-L1 adipocytes. However, its physiological role in adipocytes has not been identified. Using male and female mice with adipose tissue-specific knockdown of the EPO receptor, we determine that adipocyte EPO signaling is not essential for the maintenance of energy homeostasis or glucose metabolism. Adipose tissue-specific disruption of EPO receptor did not alter adipose tissue expansion, adipocyte morphology, insulin resistance, inflammation, or angiogenesis in vivo. In contrast to the pharmacological effects of EPO, we demonstrate that EPO signaling at physiological levels is not essential for adipose tissue regulation of metabolism.
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MESH Headings
- Adipose Tissue, Brown/blood supply
- Adipose Tissue, Brown/cytology
- Adipose Tissue, Brown/immunology
- Adipose Tissue, Brown/metabolism
- Adipose Tissue, White/blood supply
- Adipose Tissue, White/cytology
- Adipose Tissue, White/metabolism
- Adipose Tissue, White/pathology
- Adiposity
- Adult
- Animals
- Cells, Cultured
- Diabetes Mellitus, Type 2/immunology
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Diet, High-Fat/adverse effects
- Energy Metabolism
- Female
- Gene Expression Regulation
- Glucose/metabolism
- Humans
- Insulin Resistance
- Male
- Mice
- Mice, Knockout
- Middle Aged
- Neovascularization, Physiologic
- Obesity/etiology
- Obesity/immunology
- Obesity/metabolism
- Obesity/pathology
- Receptors, Erythropoietin/genetics
- Receptors, Erythropoietin/metabolism
- Specific Pathogen-Free Organisms
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Affiliation(s)
- Cynthia T Luk
- MD, PhD, Toronto General Research Institute, 101 College Street, MaRS Centre/TMDT, Room 10-363, Toronto, Ontario, Canada M5G 1L7.
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14
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Vargovic P, Ukropec J, Laukova M, Kurdiova T, Balaz M, Manz B, Ukropcova B, Kvetnansky R. Repeated immobilization stress induces catecholamine production in rat mesenteric adipocytes. Stress 2013; 16:340-52. [PMID: 23035889 DOI: 10.3109/10253890.2012.736046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Catecholamines (CATs), the major regulator of lipolysis in adipose tissue, are produced mainly by the sympathoadrenal system. However, recent studies report endogenous CAT production in adipocytes themselves. This study investigated the effects of single and repeated (7-14 times) immobilization (IMO) stress on CAT production in various fat depots of the rat. Single IMO quickly induced a rise of norepinephrine (NE) and epinephrine (EPI) concentration in mesenteric and brown adipose depots. Adaptive response to repeated IMO included robust increases of NE and EPI levels in mesenteric and subcutaneous adipose tissue. These changes likely reflect the activation of sympathetic nervous system in fat depots by IMO. However, this process was also paralleled by an increase in tyrosine hydroxylase gene expression in mesenteric fat, suggesting regulation of endogenous CAT production in adipose tissue cells. Detailed time-course analysis (time course 10, 30, and 120 min) clearly showed that repeated stress led to increased CAT biosynthesis in isolated mesenteric adipocytes resulting in gradual accumulation of intracellular EPI during IMO exposure. Comparable changes were also found in stromal/vascular fractions, with more pronounced effects of single than repeated IMO. The potential physiological importance of these findings is accentuated by parallel increase in expression of vesicular monoamine transporter 1, indicating a need for CAT storage in adipocyte vesicles. Taken together, we show that CAT production occurs in adipose tissue and may be activated by stress directly in adipocytes.
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Affiliation(s)
- Peter Vargovic
- Laboratory of Stress Research, Institute of Experimental Endocrinology, Slovak Academy of Sciences, Bratislava, Slovakia.
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15
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Lu X, Zheng Y. Comment on: Elias et al. Adipose tissue overexpression of vascular endothelial growth factor protects against diet-induced obesity and insulin resistance. Diabetes 2012;61:1801-1813. Diabetes 2013; 62:e3. [PMID: 23258919 PMCID: PMC3526032 DOI: 10.2337/db12-1130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Xiaodan Lu
- Transgenic Animal Research Center, School of Life Science, Northeast Normal University, Changchun, Jilin, China
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16
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Elias I, Franckhauser S, Bosch F. Response to Comment on: Elias et al. Adipose tissue overexpression of vascular endothelial growth factor protects against diet-induced obesity and insulin resistance. Diabetes 2012;61:1801-1813. Diabetes 2013; 62:e4. [PMID: 23258920 PMCID: PMC3526023 DOI: 10.2337/db12-1274] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Ivet Elias
- From the Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Barcelona, Spain
- the Departments of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
- and the CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Sylvie Franckhauser
- From the Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Barcelona, Spain
- and the CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Fatima Bosch
- From the Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Barcelona, Spain
- the Departments of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
- and the CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
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17
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Elias I, Franckhauser S, Ferré T, Vilà L, Tafuro S, Muñoz S, Roca C, Ramos D, Pujol A, Riu E, Ruberte J, Bosch F. Adipose tissue overexpression of vascular endothelial growth factor protects against diet-induced obesity and insulin resistance. Diabetes 2012; 61:1801-13. [PMID: 22522611 PMCID: PMC3379662 DOI: 10.2337/db11-0832] [Citation(s) in RCA: 231] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
During the expansion of fat mass in obesity, vascularization of adipose tissue is insufficient to maintain tissue normoxia. Local hypoxia develops and may result in altered adipokine expression, proinflammatory macrophage recruitment, and insulin resistance. We investigated whether an increase in adipose tissue angiogenesis could protect against obesity-induced hypoxia and, consequently, insulin resistance. Transgenic mice overexpressing vascular endothelial growth factor (VEGF) in brown adipose tissue (BAT) and white adipose tissue (WAT) were generated. Vessel formation, metabolism, and inflammation were studied in VEGF transgenic mice and wild-type littermates fed chow or a high-fat diet. Overexpression of VEGF resulted in increased blood vessel number and size in both WAT and BAT and protection against high-fat diet-induced hypoxia and obesity, with no differences in food intake. This was associated with increased thermogenesis and energy expenditure. Moreover, whole-body insulin sensitivity and glucose tolerance were improved. Transgenic mice presented increased macrophage infiltration, with a higher number of M2 anti-inflammatory and fewer M1 proinflammatory macrophages than wild-type littermates, thus maintaining an anti-inflammatory milieu that could avoid insulin resistance. These studies suggest that overexpression of VEGF in adipose tissue is a potential therapeutic strategy for the prevention of obesity and insulin resistance.
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Affiliation(s)
- Ivet Elias
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Sylvie Franckhauser
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Tura Ferré
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Laia Vilà
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Sabrina Tafuro
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Sergio Muñoz
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Carles Roca
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - David Ramos
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Department of Anatomy and Animal Health, School of Veterinary Medicine, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Anna Pujol
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Efren Riu
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Jesús Ruberte
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
- Department of Anatomy and Animal Health, School of Veterinary Medicine, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Fatima Bosch
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
- Corresponding author: Fatima Bosch,
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18
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Hemmeryckx B, Hoylaerts MF, Lijnen HR. Effect of premature aging on murine adipose tissue. Exp Gerontol 2012; 47:256-62. [PMID: 22265801 DOI: 10.1016/j.exger.2012.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 12/09/2011] [Accepted: 01/03/2012] [Indexed: 10/14/2022]
Abstract
To evaluate the effect of aging on adipose tissue development, subcutaneous (SC) and gonadal (GON) white and peri-aortic brown adipose tissues were analyzed of 10 and 30 week old mice deficient in the clock gene Bmal1 (brain and muscle arnt like protein 1) (Bmal1(-/-)) and wild-type littermates (Bmal1(+/+)) kept on a standard fat diet. At both ages, daily food intake was significantly decreased for Bmal1(-/-) mice, associated with reduced hypothalamic expression of PPARα. Between 10 and 30 weeks of age, the total body weight of Bmal1(+/+) mice increased significantly, but that of Bmal1(-/-) mice did not change. Whereas for Bmal1(+/+) mice, both SC and GON fat mass increased with age, these decreased for Bmal1(-/-) mice. This was associated with increased adipocyte size with age for Bmal1(+/+) but not for Bmal1(-/-) mice. Adipose tissue related angiogenesis was not affected by genotype or aging. Peri-aortic brown adipose tissue mass in 30 week old Bmal1(-/-) mice was significantly reduced as compared to age-matched Bmal1(+/+) mice. Comparison of gene expression profiles in SC and GON adipose tissues of both genotypes revealed very marked effects of Bmal1 gene deletion in itself on PAI-1 (4- to 13-fold downregulation), whereas the associated effect of premature aging was striking for leptin (90- to 130-fold downregulation). Thus, premature aging in Bmal1(-/-) mice kept on normal chow was associated with reduced adiposity.
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MESH Headings
- ARNTL Transcription Factors/deficiency
- ARNTL Transcription Factors/genetics
- Adipocytes/pathology
- Adipose Tissue/blood supply
- Adipose Tissue/growth & development
- Adipose Tissue/metabolism
- Adipose Tissue, Brown/blood supply
- Adipose Tissue, Brown/growth & development
- Adipose Tissue, Brown/metabolism
- Adipose Tissue, White/blood supply
- Adipose Tissue, White/growth & development
- Adipose Tissue, White/metabolism
- Adiposity/physiology
- Aging/metabolism
- Aging/physiology
- Aging, Premature/genetics
- Aging, Premature/metabolism
- Aging, Premature/physiopathology
- Animals
- Blood Glucose/metabolism
- Blood Vessels/pathology
- Cell Size
- Disease Models, Animal
- Eating/physiology
- Gene Expression
- Gene Expression Profiling/methods
- Lipids/blood
- Male
- Mice
- Mice, Knockout
- Weight Gain/physiology
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Affiliation(s)
- Bianca Hemmeryckx
- Center for Molecular and Vascular Biology, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
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Sakurai T, Endo S, Hatano D, Ogasawara J, Kizaki T, Oh-ishi S, Izawa T, Ishida H, Ohno H. Effects of exercise training on adipogenesis of stromal-vascular fraction cells in rat epididymal white adipose tissue. Acta Physiol (Oxf) 2010; 200:325-38. [PMID: 20590530 DOI: 10.1111/j.1748-1708.2010.02159.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM Previous studies have shown that exercise training reduced white adipose tissue (WAT) mass compared to that in sedentary controls, and that the smaller mass contained fewer adipocytes. However, the effect of exercise training on adipogenesis is not completely clear. Therefore, we re-examined the effect of exercise training on adipocyte numbers in WAT and, if such an effect was found tested the adipogenic responses of stromal-vascular fraction (SVF) cells containing adipose tissue-derived stem cells (ADSC) in epididymal WAT from exercise-trained (TR) rats. METHODS Wistar male rats were divided into two groups: control (C) and TR. The TR rats were subjected to exercise on a treadmill for 9 weeks. SVF cells containing ADSC were separated from epididymal WAT by centrifugation. Expression of adipocyte differentiation-related genes and adipogenesis of SVF cells were examined. RESULTS In SVF cells of TR rats, the expression of peroxisome proliferator-activated receptor γ (PPARγ) and that of PPARγ target lipogenic genes was dramatically downregulated, whereas that of preadipocyte factor-1 gene was significantly upregulated. Lipid accumulation in SVF cells of TR rats after the induction of adipocyte differentiation was significantly suppressed in comparison with that of C rats. Moreover, increased expression of hypoxia-inducible factor-1α (HIF-1α) protein was observed in SVF cells of TR rats. Pre-treatment of YC-1, a potent HIF-1α inhibitor, in SVF cells of TR rats restored adipogenesis. CONCLUSION These results suggest that exercise training suppresses the ability of SVF cells to differentiate into adipocytes, and that underlying mechanisms involve the upregulation of HIF-1α expression.
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Affiliation(s)
- T Sakurai
- Department of Molecular Predictive Medicine and Sport Science, Kyorin University, Tokyo, Japan.
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20
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Abstract
Ageing is associated with an increase in visceral obesity in men and women. Although wild-type mice with a C57Bl/6 genetic background are extensively used in studies on obesity and metabolism, little information is available on age-associated changes in their adipose tissues. We have evaluated development and composition of subcutaneous (SC) and gonadal (GON) adipose tissue in male C57Bl/6 mice at the ages of 10 weeks, 12 months or 24 months, while kept on normal chow. Total body weight as well as SC and GON fat mass significantly increased between 10 weeks and 12 months, but markedly decreased again up to 24 months of age. Adipocyte size in both fat depots and blood vessel size in GON fat followed this trend. Plasma leptin levels correlated positively with body weight and SC or GON fat mass. Both 12 and 24 months old mice displayed better insulin sensitivity as compared to 10 weeks old counterparts, reflected by significantly decreased plasma levels of insulin and/or glucose. Thus, ageing of C57Bl/6 male mice is associated with a biphasic pattern (increase up to 12 months followed by a decrease up to 24 months) of body weight, SC and GON fat mass, adipocyte and blood vessel size.
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Affiliation(s)
- Bianca Hemmeryckx
- Center for Molecular and Vascular Biology, Katholieke Universiteit Leuven, Leuven, Belgium
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21
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Pettersson US, Henriksnäs J, Jansson L. Reversal of high pancreatic islet and white adipose tissue blood flow in type 2 diabetic GK rats by administration of the beta3-adrenoceptor inhibitor SR-59230A. Am J Physiol Endocrinol Metab 2009; 297:E490-4. [PMID: 19491297 DOI: 10.1152/ajpendo.00140.2009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previous studies have shown that the Goto-Kakizaki (GK) rat, a nonobese type 2 diabetes model, has an increased white adipose tissue (WAT) and islet blood flow when compared with control rats. The aim of the study was to examine if these increased blood flow values in GK rats could be affected by the beta(3)-adrenoceptor antagonist SR-59230A. We measured organ blood flow with a microsphere technique 10 min after administration of SR-59230A (1 mg/kg body wt), or the corresponding volume of 0.9% NaCl solution (1 ml/kg body wt) in rats anaesthetized with thiobutabarbital. The GK rat had an increased blood flow in all intra-abdominal adipose tissue depots except for the sternal fat pad compared with Wistar-Furth (WF) rats. However, no differences were seen in the blood perfusion of subcutaneous white or brown adipose tissue. The blood flow was also increased in both the pancreas and in the islets in the GK rat compared with WF rats. SR-59230A treatment affected neither WAT nor pancreatic blood flow in WF rats. In GK rats, on the other hand, SR-59230A decreased both WAT and islet blood flow values to values similar to those seen in control WF rats. The whole pancreatic blood flow was not affected by SR-59230A administration in GK rats. Interestingly, the brown adipose tissue blood flow in GK rats increased after SR-59230A administration. These results suggest that beta(3)-adrenoceptors are involved in regulation of blood flow both in islet and in adipose tissue.
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MESH Headings
- Adipose Tissue, Brown/blood supply
- Adipose Tissue, Brown/drug effects
- Adipose Tissue, White/blood supply
- Adipose Tissue, White/drug effects
- Adrenergic beta-3 Receptor Antagonists
- Angiogenesis Inhibitors/therapeutic use
- Animal Structures/blood supply
- Animal Structures/drug effects
- Animals
- Diabetes Mellitus, Type 2/drug therapy
- Drug Evaluation, Preclinical
- Gene Expression/drug effects
- Islets of Langerhans/blood supply
- Islets of Langerhans/drug effects
- Male
- Propanolamines/therapeutic use
- Rats
- Rats, Inbred Strains
- Rats, Inbred WF
- Receptors, Adrenergic, beta-3/genetics
- Receptors, Adrenergic, beta-3/metabolism
- Regional Blood Flow/drug effects
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Affiliation(s)
- U S Pettersson
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden.
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Gealekman O, Burkart A, Chouinard M, Nicoloro SM, Straubhaar J, Corvera S. Enhanced angiogenesis in obesity and in response to PPARgamma activators through adipocyte VEGF and ANGPTL4 production. Am J Physiol Endocrinol Metab 2008; 295:E1056-64. [PMID: 18728224 PMCID: PMC2584813 DOI: 10.1152/ajpendo.90345.2008] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
PPARgamma activators such as rosiglitazone (RSG) stimulate adipocyte differentiation and increase subcutaneous adipose tissue mass. However, in addition to preadipocyte differentiation, adipose tissue expansion requires neovascularization to support increased adipocyte numbers. Paradoxically, endothelial cell growth and differentiation is potently inhibited by RSG in vitro, raising the question of how this drug can induce an increase in adipose tissue mass while inhibiting angiogenesis. We find that adipose tissue from mice treated with RSG have increased capillary density. To determine whether adipose tissue angiogenesis was stimulated by RSG, we developed a novel assay to study angiogenic sprout formation ex vivo. Angiogenic sprout formation from equally sized adipose tissue fragments, but not from aorta rings, was greatly increased by obesity and by TZD treatment in vivo. To define the mechanism involved in RSG-stimulated angiogenesis in adipose tissue, the expression of proangiogenic factors by adipocytes was examined. Expression of VEGFA and VEGFB, as well as of the angiopoietin-like factor-4 (ANGPTL4), was stimulated by in vivo treatment with RSG. To define the potential role of these factors, we analyzed their effects on endothelial cell growth and differentiation in vitro. We found that ANGPTL4 stimulates endothelial cell growth and tubule formation, albeit more weakly than VEGF. However, ANGPTL4 mitigates the growth inhibitory actions of RSG on endothelial cells in the presence or absence of VEGF. Thus, the interplay between VEGF and ANGPTL4 could lead to a net expansion of the adipose tissue capillary network, required for adipose tissue growth, in response to PPARgamma activators.
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MESH Headings
- Adipocytes, White/cytology
- Adipocytes, White/drug effects
- Adipocytes, White/metabolism
- Adipose Tissue, White/blood supply
- Adipose Tissue, White/drug effects
- Adipose Tissue, White/metabolism
- Angiopoietin-Like Protein 4
- Angiopoietins/genetics
- Angiopoietins/metabolism
- Animals
- Antigens, CD/analysis
- Cadherins/analysis
- Capillaries/drug effects
- Capillaries/metabolism
- Cells, Cultured
- Culture Media, Conditioned/pharmacology
- Epididymis/drug effects
- Epididymis/metabolism
- Gene Expression/drug effects
- Humans
- Hypoglycemic Agents/pharmacology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Obese
- Neovascularization, Physiologic/drug effects
- Neovascularization, Physiologic/physiology
- Obesity/physiopathology
- PPAR gamma/agonists
- PPAR gamma/physiology
- Pioglitazone
- RNA, Small Interfering/genetics
- Rosiglitazone
- Thiazolidinediones/pharmacology
- Vascular Endothelial Growth Factor A/genetics
- Vascular Endothelial Growth Factor A/metabolism
- Vascular Endothelial Growth Factor B/genetics
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Affiliation(s)
- Olga Gealekman
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
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Ramsey MW, Behnke BJ, Prisby RD, Delp MD. Effects of aging on adipose resistance artery vasoconstriction: possible implications for orthostatic blood pressure regulation. J Appl Physiol (1985) 2007; 103:1636-43. [PMID: 17885023 DOI: 10.1152/japplphysiol.00637.2007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The purpose of this investigation was to determine mean arterial pressure (MAP) and regional vascular conductance responses in young and aged Fisher-344 rats during orthostatic stress, i.e., 70 degrees head-up tilt (HUT). Both groups demonstrated directionally different changes in MAP during HUT (young, 7% increase; aged, 7% decrease). Vascular conductance during HUT in young rats decreased in most tissues but largely remained unchanged in the aged animals. Based on the higher vascular conductance of white adipose tissue from aged rats during HUT, resistance arteries from white visceral fat were isolated and studied in vitro. There was diminished maximal vasoconstriction to phenylephrine and norepinephrine (NE: young, 42 +/- 5%; old, 18 +/- 6%) in adipose resistance arteries from aged rats. These results demonstrate that aging reduces the ability to maintain MAP during orthostatic stress, and this is associated with a diminished vasoconstriction of adipose resistance arteries.
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Affiliation(s)
- Michael W Ramsey
- Department of Kinesiology, Leisure, and Sport Sciences, East Tennessee State University, Johnson City, Tennessee, USA
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