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Divoux A, Whytock KL, Halasz L, Hopf ME, Sparks LM, Osborne TF, Smith SR. Distinct subpopulations of human subcutaneous adipose tissue precursor cells revealed by single-cell RNA sequencing. Am J Physiol Cell Physiol 2024; 326:C1248-C1261. [PMID: 38581663 DOI: 10.1152/ajpcell.00726.2023] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/22/2024] [Accepted: 02/23/2024] [Indexed: 04/08/2024]
Abstract
Adipose-derived stem cells (ADSCs) play an important role in the differential capacity for excess energy storage between upper body abdominal (ABD) adipose tissue (AT) and lower body gluteofemoral (GF) AT. We cultured ADSCs from subcutaneous ABD AT and GF AT isolated from eight women with differential body fat distribution and performed single-cell RNA sequencing. Six populations of ADSCs were identified and segregated according to their anatomical origin. The three ADSC subpopulations in GF AT were characterized by strong cholesterol/fatty acid (FA) storage and proliferation signatures. The two ABD subpopulations, differentiated by higher expression of committed preadipocyte marker genes, were set apart by differential expression of extracellular matrix and ribosomal genes. The last population, identified in both depots, was similar to smooth muscle cells and when individually isolated and cultured in vitro they differentiated less than the other subpopulations. This work provides important insight into the use of ADSC as an in vitro model of adipogenesis and suggests that specific subpopulations of GF-ADSCs contribute to the more robust capacity for GF-AT to expand and grow compared with ABD-AT in women.NEW & NOTEWORTHY Identification of distinct subpopulations of adipose-derived stem cells (ADSCs) in upper body abdominal subcutaneous (ABD) and lower body gluteofemoral subcutaneous (GF) adipose tissue depots. In ABD-ADSCs, subpopulations are more committed to adipocyte lineage. GF-ADSC subpopulations are enriched for genes involved in lipids and cholesterol metabolism. Similar depot differences were found in stem cell population identified in freshly isolated stoma vascular fraction. The repertoire of ADSCs subpopulations was different in apple-shaped versus pear-shaped women.
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Affiliation(s)
- Adeline Divoux
- Translational Research Institute, AdventHealth, Orlando, Florida, United States
| | - Katie L Whytock
- Translational Research Institute, AdventHealth, Orlando, Florida, United States
| | - Laszlo Halasz
- Division of Diabetes Endocrinology and Metabolism, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, United States
- Department of Medicine, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, United States
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, United States
- Department of Pediatrics, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, United States
| | - Meghan E Hopf
- Translational Research Institute, AdventHealth, Orlando, Florida, United States
| | - Lauren M Sparks
- Translational Research Institute, AdventHealth, Orlando, Florida, United States
| | - Timothy F Osborne
- Division of Diabetes Endocrinology and Metabolism, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, United States
- Department of Medicine, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, United States
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, United States
- Department of Pediatrics, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, United States
| | - Steven R Smith
- Translational Research Institute, AdventHealth, Orlando, Florida, United States
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U-Din M, Ahmed BA, Syed SA, Ong FJ, Oreskovich SM, Gunn E, Surette MG, Punthakee Z, Steinberg GR, Morrison KM. Characteristics of Abdominal Visceral Adipose Tissue, Metabolic Health and the Gut Microbiome in Adults. J Clin Endocrinol Metab 2024; 109:680-690. [PMID: 37837606 DOI: 10.1210/clinem/dgad604] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 08/30/2023] [Accepted: 10/12/2023] [Indexed: 10/16/2023]
Abstract
CONTEXT Compared with the relatively benign effects of increased subcutaneous adipose tissue (SAT), increased visceral adipose tissue (VAT) volume is a causal risk factor for hypertension, hyperlipidemia, type 2 diabetes, and cardiovascular disease. In rodents, increased VAT volume and triglyceride density and ectopic lipid accumulation in kidneys and liver have been induced by alterations in the gut microbiome. However, few studies have characterized these relationships in humans. OBJECTIVE To evaluate the tissue triglyceride content of VAT and SAT, liver, kidneys, and pancreas in male and female adults and assess associations with markers of glucose tolerance, serum insulin, and lipids and characteristics of the gut microbiome. METHODS Cross-sectional observational study of healthy human adults (n = 60) at a clinical research center. Body mass index (BMI), body composition, and oral glucose tolerance were assessed. Microbiome analysis was conducted on stool samples using 16S rRNA v3 amplicon sequencing. The triglyceride content of VAT, SAT, liver, kidney and pancreas were determined by assessing proton density fat fraction (PDFF) with magnetic resonance imaging (MRI). RESULTS Higher VAT PDFF and the ratio of VAT to SAT PDFF were related to higher BMI, HbA1c, HOMA-IR, non-high-density lipoprotein cholesterol, plasma triglycerides, low-density lipoprotein (LDL) cholesterol, and lower high-density lipoprotein (HDL) cholesterol. A higher VAT PDFF and VAT to SAT PDFF ratio were associated with lower alpha diversity and altered beta diversity of the gut microbiome. Differences in VAT were associated with higher relative abundance of the phylum Firmicutes, lower relative abundance of the phylum Bacteroidetes, and enrichment of the bacterial genera Dorea, Streptococcus, and Solobacterium. CONCLUSION VAT PDFF measured with MRI is related to impaired glucose homeostasis, dyslipidemia, and differences in the gut microbiome, independently of the total body fat percentage.
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Affiliation(s)
- Mueez U-Din
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Turku PET Centre, Turku University Hospital, Turku 20520, Finland
| | - Basma A Ahmed
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Biochemistry & Biomedical Sciences, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Saad A Syed
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Biochemistry & Biomedical Sciences, McMaster University, Hamilton, ON L8S 4L8, Canada
- Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Frank J Ong
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Stephan M Oreskovich
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Elizabeth Gunn
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Michael G Surette
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Biochemistry & Biomedical Sciences, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
- Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Zubin Punthakee
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Gregory R Steinberg
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Biochemistry & Biomedical Sciences, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Katherine M Morrison
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Paediatrics, McMaster University, Hamilton, ON L8S 4L8, Canada
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Cui TT, Huang JX, Ning BL, Mu F, Chen HY, Xing TY, Li H, Wang N. DNA methylation promotes the expression of PPARγ transcript 1 at least in part by preventing NRF1 binding to the promoter P1 of chicken PPARγ gene. Poult Sci 2024; 103:103559. [PMID: 38430780 PMCID: PMC10912915 DOI: 10.1016/j.psj.2024.103559] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 12/16/2023] [Accepted: 02/12/2024] [Indexed: 03/05/2024] Open
Abstract
Peroxisome proliferator-activated receptor gamma (PPARγ) is a master regulator of adipogenesis. Our previous study revealed that chicken PPARγ has 3 alternative promoters named as P1, P2, and P3, and the DNA methylation of promoter P3 was negatively associated with PPARγ mRNA expression in abdominal adipose tissue (AAT). However, the methylation status of promoters P1 and P2 is unclear. Here we assessed promoter P1 methylation status in AAT of Northeast Agricultural University broiler lines divergently selected for abdominal fat content (NEAUHLF). The results showed that promoter P1 methylation differed in AAT between the lean and fat lines of NEAUHLF at 7 wk of age (p < 0.05), and AAT expression of PPARγ transcript 1 (PPARγ1), which was derived from the promoter P1, was greatly higher in fat line than in lean line at 2 and 7 wk of age. The results of the correlation analysis showed that P1 methylation was positively correlated with PPARγ1 expression at 7 wk of age (Pearson's r = 0.356, p = 0.0242), suggesting P1 methylation promotes PPARγ1 expression. To explore the underlying molecular mechanism of P1 methylation on PPARγ1 expression, bioinformatics analysis, dual-luciferase reporter assay, pyrosequencing, and electrophoresis mobility shift assay (EMSA) were performed. The results showed that transcription factor NRF1 repressed the promoter activity of the unmethylated P1, but not the methylated P1. Of all the 4 CpGs (CpG48, CpG49, CpG50, and CpG51), which reside within or nearby the NRF1 binding sites of the P1, only CpG49 methylation in AAT was remarkably higher in the fat line than in lean line at 7 wk of age (3.18 to 0.57, p < 0.05), and CpG49 methylation was positively correlated with PPARγ1 expression (Pearson's r = 0.3716, p = 0.0432). Furthermore, EMSA showed that CpG49 methylation reduced the binding of NRF1 to the P1. Taken together, our findings illustrate that P1 methylation promotes PPARγ1 expression at least in part by preventing NRF1 from binding to the promoter P1.
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Affiliation(s)
- T T Cui
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China; College of Life Science and Agriculture Forestry, Qiqihar University, Qiqihar, 161006, China; Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs; Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China
| | - J X Huang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs; Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China
| | - B L Ning
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs; Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China
| | - F Mu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs; Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China
| | - H Y Chen
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs; Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China
| | - T Y Xing
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs; Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China
| | - H Li
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs; Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China
| | - N Wang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs; Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China.
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Hsu LY, Ali Z, Bagheri H, Huda F, Redd BA, Jones EC. Comparison of CT and Dixon MR Abdominal Adipose Tissue Quantification Using a Unified Computer-Assisted Software Framework. Tomography 2023; 9:1041-1051. [PMID: 37218945 DOI: 10.3390/tomography9030085] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 05/24/2023] Open
Abstract
PURPOSE Reliable and objective measures of abdominal fat distribution across imaging modalities are essential for various clinical and research scenarios, such as assessing cardiometabolic disease risk due to obesity. We aimed to compare quantitative measures of subcutaneous (SAT) and visceral (VAT) adipose tissues in the abdomen between computed tomography (CT) and Dixon-based magnetic resonance (MR) images using a unified computer-assisted software framework. MATERIALS AND METHODS This study included 21 subjects who underwent abdominal CT and Dixon MR imaging on the same day. For each subject, two matched axial CT and fat-only MR images at the L2-L3 and the L4-L5 intervertebral levels were selected for fat quantification. For each image, an outer and an inner abdominal wall regions as well as SAT and VAT pixel masks were automatically generated by our software. The computer-generated results were then inspected and corrected by an expert reader. RESULTS There were excellent agreements for both abdominal wall segmentation and adipose tissue quantification between matched CT and MR images. Pearson coefficients were 0.97 for both outer and inner region segmentation, 0.99 for SAT, and 0.97 for VAT quantification. Bland-Altman analyses indicated minimum biases in all comparisons. CONCLUSION We showed that abdominal adipose tissue can be reliably quantified from both CT and Dixon MR images using a unified computer-assisted software framework. This flexible framework has a simple-to-use workflow to measure SAT and VAT from both modalities to support various clinical research applications.
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Affiliation(s)
- Li-Yueh Hsu
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Building 10, Room 1C370, 10 Center Drive, Bethesda, MA 20892, USA
| | - Zara Ali
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Building 10, Room 1C370, 10 Center Drive, Bethesda, MA 20892, USA
| | - Hadi Bagheri
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Building 10, Room 1C370, 10 Center Drive, Bethesda, MA 20892, USA
| | - Fahimul Huda
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Building 10, Room 1C370, 10 Center Drive, Bethesda, MA 20892, USA
| | - Bernadette A Redd
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Building 10, Room 1C370, 10 Center Drive, Bethesda, MA 20892, USA
| | - Elizabeth C Jones
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Building 10, Room 1C370, 10 Center Drive, Bethesda, MA 20892, USA
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Liu W, Li Q, Wang Q, Ma S, Yang X, Zhang J, Qiu J, Li J, Yang C, Li X, Zhang H, Jiang Y, Zhang Y, Zhao Y. Association between body fat composition and hyperhomocysteinemia in the analysis of the baseline data of the Northwest China Natural Population Cohort: Ningxia Project (CNC-NX). J Clin Hypertens (Greenwich) 2023. [PMID: 37147933 DOI: 10.1111/jch.14666] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/28/2023] [Accepted: 04/21/2023] [Indexed: 05/07/2023]
Abstract
The authors conducted an observational study to explore the association between body fat composition and the risk of hyperhomocysteinemia (HHcy) and their combined effect on the risk of developing cardiovascular disease (CVD). Adults aged 18-74 years from the Northwest China Natural Population Cohort: Ningxia Project (CNC-NX) were recruited in this study. Association between body fat composition and HHcy was evaluated by logistic regression model. Restricted cubic spline was used to find nonlinear association. The impact of the interaction between HHcy and body fat composition on CVD was evaluated using the addition interaction model and mediation effect model. In total, 16 419 participants were included in this research. Body fat percentage, visceral fat level, and abdominal fat thickness were positively associated with overall HHcy (p for trend < .001). Adjusted odds ratios (ORs) in quarter 4 were 1.181 (95% CI: 1.062, 1.313), 1.202 (95% CI: 1.085, 1.332), and 1.168 (95% CI: 1.055, 1.293) for body fat percentage, visceral fat level, and abdominal fat thickness, respectively, compared with those in quarter 1. Subgroup analysis indicated age, estimated glomerular filtration rate (eGFR), total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), and CVD were the interaction factors of body fat percentage, visceral fat level, abdominal fat thickness with HHcy (all p for interaction < .05). ORs of CVD were higher in participants with HHcy and high body fat. Body fat composition was positively associated with HHcy, indicating that reducing body, abdominal, and visceral fat content may lower the risk of HHcy and CVD.
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Affiliation(s)
- Wanlu Liu
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
| | - Qingqing Li
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
| | - Qingan Wang
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
- Key Laboratory of Environmental Factors and Chronic Disease Control, Ningxia Medical University, Yinchuan, China
| | - Shengchao Ma
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, China
- The School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Xiaoling Yang
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, China
- The School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Jiaxing Zhang
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
| | - Jiangwei Qiu
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
| | - Juan Li
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
| | - Chan Yang
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
- School of Nursing, Ningxia Medical University, Ningxia Medical University, Yinchuan, China
| | - Xiaoxia Li
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
- Key Laboratory of Environmental Factors and Chronic Disease Control, Ningxia Medical University, Yinchuan, China
| | - Huiping Zhang
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, China
- Department of Prenatal Diagnosis, Maternal and Child Health Hospital of Hunan Province, Changsha, China
| | - Yideng Jiang
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, China
- The School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Yuhong Zhang
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
- Key Laboratory of Environmental Factors and Chronic Disease Control, Ningxia Medical University, Yinchuan, China
| | - Yi Zhao
- School of Public Health and Management, Ningxia Medical University, Xingqing District, Yinchuan, China
- Key Laboratory of Environmental Factors and Chronic Disease Control, Ningxia Medical University, Yinchuan, China
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Ogunleye OA, Raviprakash H, Simmons AM, Bovell RTM, Martinez PE, Yanovski JA, Berman KF, Schmidt PJ, Jones EC, Bagheri H, Biassou NM, Hsu LY. A Combined Region- and Pixel-Based Deep Learning Approach for Quantifying Abdominal Adipose Tissue in Adolescents Using Dixon Magnetic Resonance Imaging. Tomography 2023; 9:139-49. [PMID: 36648999 DOI: 10.3390/tomography9010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND The development of adipose tissue during adolescence may provide valuable insights into obesity-associated diseases. We propose an automated convolutional neural network (CNN) approach using Dixon-based magnetic resonance imaging (MRI) to quantity abdominal subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT) in children and adolescents. METHODS 474 abdominal Dixon MRI scans of 136 young healthy volunteers (aged 8-18) were included in this study. For each scan, an axial fat-only Dixon image located at the L2-L3 disc space and another image at the L4-L5 disc space were selected for quantification. For each image, an outer and an inner region around the abdomen wall, as well as SAT and VAT pixel masks, were generated by expert readers as reference standards. A standard U-Net CNN architecture was then used to train two models: one for region segmentation and one for fat pixel classification. The performance was evaluated using the dice similarity coefficient (DSC) with fivefold cross-validation, and by Pearson correlation and the Student's t-test against the reference standards. RESULTS For the DSC results, means and standard deviations of the outer region, inner region, SAT, and VAT comparisons were 0.974 ± 0.026, 0.997 ± 0.003, 0.981 ± 0.025, and 0.932 ± 0.047, respectively. Pearson coefficients were 1.000 for both outer and inner regions, and 1.000 and 0.982 for SAT and VAT comparisons, respectively (all p = NS). CONCLUSION These results show that our method not only provides excellent agreement with the reference SAT and VAT measurements, but also accurate abdominal wall region segmentation. The proposed combined region- and pixel-based CNN approach provides automated abdominal wall segmentation as well as SAT and VAT quantification with Dixon MRI and enables objective longitudinal assessment of adipose tissues in children during adolescence.
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Wu ZQ, Cheng J, Xiao XX, Zhang HR, Wang J, Peng J, Liu C, Cai P, Li XM. Preoperative prediction of early recurrence of HBV-related hepatocellular carcinoma (≤5 cm) by visceral adipose tissue index. Front Surg 2023; 9:985168. [PMID: 36684155 PMCID: PMC9852492 DOI: 10.3389/fsurg.2022.985168] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 11/04/2022] [Indexed: 01/09/2023] Open
Abstract
Background This study aimed to investigate whether visceral adipose tissue index (VATI) is a significant risk factor for the early recurrence (ER) of HBV-related hepatocellular carcinoma (HCC) (≤5 cm) after hepatectomy. Methods The recruited cohort patients who were positive for hepatitis B virus, presented with surgically confirmed HCC (≤5 cm) from Army Medical University (internal training cohort: n = 192) and Chongqing Medical University (external validation group: n = 46). We measured VATI, subcutaneous adipose tissue index (SATI) via computed tomography (CT). ER was defined as recurrence within 2 years after hepatectomy. The impact of parameters on outcome after hepatectomy for HCC was analyzed. Results Univariate analysis showed that alpha-fetoprotein levels (p = 0.044), body mass index (BMI) (p < 0.001), SATI (p < 0.001), and VATI (p < 0.001) were significantly different between ER and non-ER groups in internal training cohort. Multivariate analysis identified VATI as an independent risk factor for ER (odds ratio = 1.07, 95% confidence interval: 1.047-1.094, p < 0.001), with a AUC of 0.802, based on the cut-off value of VATI, which was divided into high risk (≥37.45 cm2/m2) and low risk (<37.45 cm2/m2) groups. The prognosis of low risk group was significantly higher than that of high risk group (p < 0.001). The AUC value of VATI in external validation group was 0.854. Conclusion VATI was an independent risk factor for the ER, and higher VATI was closely related to poor outcomes after hepatectomy for HBV-related HCC (≤5 cm).
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Affiliation(s)
- Zong-qian Wu
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Jie Cheng
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Xi-xi Xiao
- Department of Oncology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Hua-rong Zhang
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Jian Wang
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Juan Peng
- Department of Radiology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Chen Liu
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Ping Cai
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China,Correspondence: Ping Cai Xiao-ming Li
| | - Xiao-ming Li
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China,Correspondence: Ping Cai Xiao-ming Li
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Cheng Y, Wang Z, Jia X, Zhou R, Wang J. Association Between Abdominal Adipose Tissue Distribution and Risk of Endometrial Cancer: A Case-Control Study. Clin Med Insights Oncol 2022; 16:11795549221140776. [PMCID: PMC9742701 DOI: 10.1177/11795549221140776] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 11/07/2022] [Indexed: 12/14/2022] Open
Abstract
Background: Obesity contributes to endometrial cancer (EC). However, it is not clear whether the distribution of adipose tissue affects the occurrence of endometrial carcinoma. This study aimed to evaluate the relationship between abdominal adipose tissue distribution and EC. Methods: We designed a case-control study with 115 women with EC and a control group. The total abdominal adipose tissue, visceral adipose tissue, and subcutaneous adipose tissue were measured by single slice computerized tomography at the level of umbilicus. Univariate and multivariate logistic regression models were used to calculate odds ratios (ORs) for the risk of EC associated with adipose tissue distribution. Furthermore, we analyzed the correlation between adipose tissue distribution and clinicopathologic features of endometrial carcinoma. Results: Multivariate analysis showed that a larger visceral adipose tissue ratio was associated with an increased risk of EC after adjusting for body mass index (BMI) and diabetes (OR = 1.046, 95% confidence interval = [1.008-1.079]). The ratio of International Federation of Obstetrics and Gynecology (FIGO) stage I and type I EC was higher in EC patients with larger visceral adipose tissue (84.5% vs 63.2%, P = .009; 91.4% vs 75.4%, P = .021). There was a higher positive ratio of progesterone receptor in EC patients with a larger subcutaneous adipose tissue area (91.2% vs 77.6%; P = .044). Conclusions: Higher visceral adipose tissue ratio, independent of BMI, was associated with an increased risk of EC. Therefore, this study demonstrated that women with normal BMI, but abnormal abdominal adipose tissue distribution, have an increased risk for EC.
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Affiliation(s)
- Yuan Cheng
- Department of Gynecology and Obstetrics, Peking University People’s Hospital, Beijing, China
| | - Zhongyu Wang
- Department of Gynecology and Obstetrics, Peking University People’s Hospital, Beijing, China
| | - Xiaoxuan Jia
- Department of Radiology, Peking University People’s Hospital, Beijing, China
| | - Rong Zhou
- Department of Gynecology and Obstetrics, Peking University People’s Hospital, Beijing, China
| | - Jianliu Wang
- Department of Gynecology and Obstetrics, Peking University People’s Hospital, Beijing, China,Jianliu Wang, Department of Gynecology and Obstetrics, Peking University People’s Hospital, Beijing 100044, China.
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9
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Gelpi M, Vestad B, Raju SC, Hansen SH, Høgh J, Midttun Ø, Ueland PM, Ueland T, Benfield T, Kofoed KF, Hov JR, Trøseid M, Nielsen SD. Association of the kynurenine pathway of tryptophan metabolism with HIV-related gut microbiota alterations and visceral adipose tissue accumulation. J Infect Dis 2022; 225:1948-1954. [PMID: 35089326 DOI: 10.1093/infdis/jiac018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/26/2022] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The aim of the study was to investigate the association between HIV-related gut microbiota changes, alterations in the Kyn pathway of Trp metabolism and visceral adipose tissue in the context of HIV infection. METHODS 383 people with HIV (PWH) were included from the COCOMO study. Gut microbiota composition was analyzed by 16S ribosomal RNA sequencing. Plasma metabolites were analyzed by LC-MS/MS. Visceral (VAT) and subcutaneous (SAT) adipose tissue areas were measured by single slice CT scan (4 th lumbar vertebra). RESULTS HIV-related gut microbiota alterations were associated with lower tryptophan (β -0.01 [-0.03;-0.00]) and higher kynurenine-to-tryptophan ratio (β 0.03 [95% CI, 0.01;0.05]), which in turn was associated with higher VAT-to-SAT ratio (β 0.50 [0.10;0.90]) and larger VAT area (β 30.85 [4.43;57.28]). In mediation analysis, kynurenine-to-tryptophan ratio mediated 10% (p-value 0.023) of the association between VAT-to-SAT ratio and HIV-related gut microbiota. CONCLUSIONS Our data suggest HIV-related gut microbiota compositional changes and gut microbial translocation as potential drivers of high kynurenine-to-tryptophan ratio in PWH. In turn, increased activity in the kynurenine pathway of tryptophan metabolism was associated with larger visceral adipose tissue area. Taken together, our findings may suggest a possible role for this pathway in the gut-adipose tissue axis in the context of HIV infection.
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Affiliation(s)
- M Gelpi
- Copenhagen University Hospital - Rigshospitalet, Department of Infectious Diseases, Copenhagen, Denmark
| | - B Vestad
- University of Oslo, Institute of Clinical Medicine, Oslo, Norway.,Oslo University Hospital Rikshospitalet, Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation, Oslo, Norway
| | - S C Raju
- University of Oslo, Institute of Clinical Medicine, Oslo, Norway.,Oslo University Hospital Rikshospitalet, Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation, Oslo, Norway
| | - S Hyll Hansen
- Oslo University Hospital Rikshospitalet, Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation, Oslo, Norway.,Oslo University Hospital Rikshospitalet, Norwegian PSC Research Center, Department of Transplantation Medicine, Oslo, Norway
| | - J Høgh
- Copenhagen University Hospital - Rigshospitalet, Department of Infectious Diseases, Copenhagen, Denmark
| | - Ø Midttun
- University of Bergen, Section for Pharmacology, Department of Clinical Science, Bergen, Norway
| | - P M Ueland
- University of Bergen, Section for Pharmacology, Department of Clinical Science, Bergen, Norway
| | - T Ueland
- University of Oslo, Institute of Clinical Medicine, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway.,Thrombosis Research Center, Department of Clinical Medicine, UiT - The Arctic University of Norway, Tromsø, Norway
| | - T Benfield
- Copenhagen University Hospital - Amarger and Hvidovre, Department of Infectious Diseases, Hvidovre, Denmark.,University of Copenhagen, Department of Clinical Medicine, Faculty of Health and Medical Sciences, Copenhagen, Denmark
| | - Klaus F Kofoed
- Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - J R Hov
- University of Oslo, Institute of Clinical Medicine, Oslo, Norway.,Oslo University Hospital Rikshospitalet, Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation, Oslo, Norway.,Oslo University Hospital Rikshospitalet, Norwegian PSC Research Center, Department of Transplantation Medicine, Oslo, Norway.,Oslo University Hospital Rikshospitalet, Section of Gastroenterology, Department of Transplantation Medicine, Oslo, Norway
| | - M Trøseid
- University of Oslo, Institute of Clinical Medicine, Oslo, Norway.,Oslo University Hospital Rikshospitalet, Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation, Oslo, Norway.,Oslo University Hospital Rikshospitalet, Section of Clinical Immunology and Infectious Diseases, Department of Rheumatology, Dermatology and Infectious Diseases, Oslo, Norway
| | - S Dam Nielsen
- Copenhagen University Hospital - Rigshospitalet, Department of Infectious Diseases, Copenhagen, Denmark.,University of Copenhagen, Department of Clinical Medicine, Faculty of Health and Medical Sciences, Copenhagen, Denmark
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10
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Sun J, Lv H, Li M, Zhao L, Liu Y, Zeng N, Wei X, Chen Q, Ren P, Liu Y, Zhang P, Yang Z, Zhang Z, Wang Z. How much abdominal fat do obese patients lose short term after laparoscopic sleeve gastrectomy? A quantitative study evaluated with MRI. Quant Imaging Med Surg 2021; 11:4569-4582. [PMID: 34737924 DOI: 10.21037/qims-20-1380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 05/28/2021] [Indexed: 11/06/2022]
Abstract
Background This study aimed to elucidate the changes in the amount of abdominal adipose tissue after laparoscopic sleeve gastrectomy in obese Chinese patients over a relatively short follow-up period and to analyze the differences in the effects of surgery between genders. Methods Ninety-one patients were enrolled in the study, including 18 males and 73 females. These patients underwent laparoscopic sleeve gastrectomy between November 2017 and November 2019. Before and short term after surgery, the areas of subcutaneous/visceral adipose tissue and the liver proton density fat fraction were calculated with upper abdominal magnetic resonance (MR) examinations. Results Approximately 100 days after surgery, the median values of weight loss and body mass index reduction were 23.1 kg and 8.1 kg/m2, respectively. The patients achieved a greater absolute loss of subcutaneous adipose tissue index than of visceral adipose tissue index (3.2×10-3 vs. 1.6×10-3, P<0.001). The amount of weight loss, body mass index loss and absolute/relative reduction in visceral adipose tissue index were much greater in males than in females (31.7 vs. 21.7 kg, P<0.001; 9.8 vs. 7.9 kg/m2, P=0.016; 2.5×10-3 vs. 1.3×10-3, P=0.007; 28.2% vs. 20.9%, P=0.029). There was a correlation between decreased amounts in subcutaneous and visceral adipose tissue in sum and weight loss (r=0.282, P=0.032). The absolute/relative reduction in visceral adipose tissue index was also correlated with absolute/relative reduction in liver proton density fat fraction (r=0.283, P=0.013; r=0.372, P=0.001). Conclusions The reductions in body weight and visceral fat were more significant in male patients. The sum of absolute reduction in subcutaneous and visceral fat deposits was correlated with weight loss, in all patients enrolled. For severely obese patients, an upper abdominal MR examination could assess the body tissue composition and how it changes after bariatric surgery.
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Affiliation(s)
- Jing Sun
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Han Lv
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Mengyi Li
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Lei Zhao
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yawen Liu
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Na Zeng
- National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xuan Wei
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Qian Chen
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Pengling Ren
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yang Liu
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Peng Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Zhenghan Yang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zhongtao Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Zhenchang Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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11
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Ni X, Jiao L, Zhang Y, Xu J, Zhang Y, Zhang X, Du Y, Sun Z, Wang S. Relationship Between Non-Alcoholic Fatty Liver Disease and Abdominal and Pericardial Adipose Tissue in Middle-Aged and Elderly Subjects. Int J Gen Med 2021; 14:3439-3444. [PMID: 34285567 PMCID: PMC8286728 DOI: 10.2147/ijgm.s317081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/03/2021] [Indexed: 12/11/2022] Open
Abstract
Objective The present study aimed to explore the relationship between non-alcoholic fatty liver disease (NAFLD) and abdominal and pericardial adipose tissue in middle-aged and elderly subjects. Methods Between July 2019 and July 2020, 471 subjects attending the Health Care Medical Department of Peking Union Medical College Hospital for a medical examination were enrolled in the study. The volume and distribution of abdominal adipose tissue together with the volume of pericardial adipose tissue were calculated according to the results of the abdominal computed tomography. The differences between subjects with NAFLD and the normal population were analyzed. Results The volume of pericardial adipose tissue, abdominal visceral and subcutaneous adipose tissue, the total volume of abdominal adipose tissue, and volume of pelvic visceral adipose tissue were all significantly increased in subjects with NAFLD. For every 100 cm3 increase in the volume of abdominal visceral adipose tissue, the incidence of developing NAFLD increased by 9.4%. According to the results of the receiver operating curve, the cut-off point of abdominal visceral adipose tissue for the diagnosis of NAFLD was 2691.1 cm3. Conclusion Overall, the risk of NAFLD increases significantly with the increase in the volume of adipose tissue.
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Affiliation(s)
- Xuefeng Ni
- Department of Healthcare, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
| | - Li Jiao
- Department of Healthcare, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
| | - Ye Zhang
- Department of Healthcare, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
| | - Jin Xu
- Department of Radiology, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
| | - Yunqing Zhang
- Department of Radiology, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
| | - Xiaona Zhang
- Department of Radiology, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
| | - Yao Du
- Department of Radiology, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
| | - Zhaoyong Sun
- Department of Radiology, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
| | - Shitian Wang
- Department of Radiology, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
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12
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Sabag A, Chang D, Johnson NA. Growth Hormone as a Potential Mediator of Aerobic Exercise-Induced Reductions in Visceral Adipose Tissue. Front Physiol 2021; 12:623570. [PMID: 33981247 PMCID: PMC8107361 DOI: 10.3389/fphys.2021.623570] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 03/02/2021] [Indexed: 12/29/2022] Open
Affiliation(s)
- Angelo Sabag
- NICM Health Research Institute, Western Sydney University, Westmead, NSW, Australia
| | - Dennis Chang
- NICM Health Research Institute, Western Sydney University, Westmead, NSW, Australia
| | - Nathan A Johnson
- School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia
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13
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Sun J, Lv H, Zhang M, Li M, Zhao L, Zeng N, Liu Y, Wei X, Chen Q, Ren P, Liu Y, Zhang P, Yang Z, Zhang Z, Wang Z. The Appropriateness Criteria of Abdominal Fat Measurement at the Level of the L1-L2 Intervertebral Disc in Patients With Obesity. Front Endocrinol (Lausanne) 2021; 12:784056. [PMID: 34970225 PMCID: PMC8712928 DOI: 10.3389/fendo.2021.784056] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 11/19/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND In this study, we proposed to use MR images at L1-L2 (lumbar) intervertebral disc level to measure abdominal fat area in patients with obesity. The quantitative results would provide evidence for the individualized assessment of the severity of obesity. METHODS All patients in the IRB-approved database of Beijing Friendship Hospital who underwent bariatric surgery between November 2017 and November 2019 were recruited. We retrospectively reviewed upper abdominal magnetic resonance (MR) data before surgery. We analyzed the correlation and consistency of the area of abdominal subcutaneous adipose tissue (ASAT) and visceral adipose tissue (VAT) measured at the L1-L2 and L2-L3 levels on MR images. We randomly distributed the cases into prediction model training data and testing data at a ratio of 7:3. RESULTS Two hundred and forty-five subjects were included. The ASAT and VAT results within the L1-L2 and L2-L3 levels were very similar and highly correlated (maleASAT: r=0.98, femaleASAT: r=0.93; maleVAT: r=0.91, femaleVAT: r=0.88). There was no substantial systematic deviation among the results at the two levels, except for the ASAT results in males. The intraclass correlation coefficients (ICCs) were 0.91 and 0.93 for maleASAT and femaleASAT, and 0.88 and 0.87 for maleVAT and femaleVAT, respectively. The ASAT/VAT area at the L2-L3 level was well predicted. The coefficient β of linear regression that predicted L2-L3 ASAT from L1-L2 ASAT was 1.11 for males and 0.99 for females. The R-squares were 0.97 and 0.91, respectively. For VAT prediction, the coefficient β was 1.02 for males and 0.96 for females. The R-squares were 0.82 and 0.77, respectively. CONCLUSION For patients with obesity, the L1-L2 intervertebral disc level can be used as the substitution of L2-L3 level in abdominal fat measurement.
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Affiliation(s)
- Jing Sun
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Han Lv
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- *Correspondence: Zhenchang Wang, ; Han Lv,
| | - Meng Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Mengyi Li
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Lei Zhao
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Na Zeng
- National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yawen Liu
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Xuan Wei
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Qian Chen
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Pengling Ren
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yang Liu
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Peng Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Zhenghan Yang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zhongtao Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China
| | - Zhenchang Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- *Correspondence: Zhenchang Wang, ; Han Lv,
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14
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Gong P, Jing Y, Liu Y, Wang L, Wu C, Du Z, Li H. Whole-genome bisulfite sequencing of abdominal adipose reveals DNA methylation pattern variations in broiler lines divergently selected for fatness. J Anim Sci 2021; 99:skaa408. [PMID: 33373456 PMCID: PMC8611762 DOI: 10.1093/jas/skaa408] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 12/23/2020] [Indexed: 11/14/2022] Open
Abstract
The methylation status of pivotal genes involved in fat deposition in chickens has been extensively studied. However, the whole-genome DNA methylation profiles of broiler abdominal adipose tissue remain poorly understood. Using whole-genome bisulfite sequencing, we generated DNA methylation profiles of chicken abdominal adipose tissue from Northeast Agricultural University broiler lines divergently selected for abdominal fat content. We aimed to explore whether DNA methylation was associated with abdominal fat deposition in broilers. The whole-genome DNA methylation profiles of fat- and lean-line broilers abdominal adipose tissue were constructed. The DNA methylation levels of functional genomic regions in the fat broiler were higher than those in the lean broiler, especially in the 3' untranslated regions (UTRs) and exons in the non-CG contexts. Additionally, we identified 29,631 differentially methylated regions and, subsequently, annotated 6,484 and 2,016 differentially methylated genes (DMGs) in the gene body and promoter regions between the two lines, respectively. Functional annotation showed that the DMGs in promoter regions were significantly enriched mainly in the triglyceride catabolic process, lipid metabolism-related pathways, and extracellular matrix signal pathways. When the DMG in promoter regions and differentially expressed genes were integrated, we identified 30 genes with DNA methylation levels that negatively correlated with their messenger RNA (mRNA) expression, of which CMSS1 reached significant levels (false discovery rate < 0.05). These 30 genes were mainly involved in fatty acid metabolism, peroxisome-proliferator-activated receptor signaling, Wnt signaling pathways, transmembrane transport, RNA degradation, and glycosaminoglycan degradation. Comparing the DNA methylation profiles between fat- and lean-line broilers demonstrated that DNA methylation is involved in regulating broiler abdominal fat deposition. Our study offers a basis for further exploring the underlying mechanisms of abdominal adipose deposition in broilers.
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Affiliation(s)
- Pengfei Gong
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and
Rural Affairs, Harbin, P.R. China
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Education
Department of Heilongjiang Province, Harbin, P.R.
China
- College of Animal Science and Technology, Northeast Agricultural
University, Harbin, P.R. China
| | - Yang Jing
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and
Rural Affairs, Harbin, P.R. China
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Education
Department of Heilongjiang Province, Harbin, P.R.
China
- College of Animal Science and Technology, Northeast Agricultural
University, Harbin, P.R. China
| | - Yumeng Liu
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and
Rural Affairs, Harbin, P.R. China
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Education
Department of Heilongjiang Province, Harbin, P.R.
China
- College of Animal Science and Technology, Northeast Agricultural
University, Harbin, P.R. China
| | - Lijian Wang
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and
Rural Affairs, Harbin, P.R. China
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Education
Department of Heilongjiang Province, Harbin, P.R.
China
- College of Animal Science and Technology, Northeast Agricultural
University, Harbin, P.R. China
| | - Chunyan Wu
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and
Rural Affairs, Harbin, P.R. China
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Education
Department of Heilongjiang Province, Harbin, P.R.
China
- College of Animal Science and Technology, Northeast Agricultural
University, Harbin, P.R. China
| | - Zhiqiang Du
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and
Rural Affairs, Harbin, P.R. China
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Education
Department of Heilongjiang Province, Harbin, P.R.
China
- College of Animal Science and Technology, Northeast Agricultural
University, Harbin, P.R. China
| | - Hui Li
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and
Rural Affairs, Harbin, P.R. China
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Education
Department of Heilongjiang Province, Harbin, P.R.
China
- College of Animal Science and Technology, Northeast Agricultural
University, Harbin, P.R. China
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15
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Gelpi M, Ueland PM, Trøseid M, Mocroft A, Lebech AM, Ullum H, Midttun Ø, Lundgren J, Nielsen SD. Abdominal Adipose Tissue Is Associated With Alterations in Tryptophan-Kynurenine Metabolism and Markers of Systemic Inflammation in People With Human Immunodeficiency Virus. J Infect Dis 2020; 221:419-427. [PMID: 31538186 DOI: 10.1093/infdis/jiz465] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 09/11/2019] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND While both adipose tissue accumulation and tryptophan metabolism alterations are features of human immunodeficiency virus (HIV) infection, their interplay is unclear. We investigated associations between abdominal adipose tissue, alterations in kynurenine pathway of tryptophan metabolism, and systemic inflammation in people with HIV (PWH). METHODS Eight hundred sixty-four PWH and 75 uninfected controls were included. Plasma samples were collected and analyzed for kynurenine metabolites, neopterin, high-sensitivity C-reactive protein (hs-CRP), and lipids. Regression models were used to test associations in PWH. RESULTS PWH had higher kynurenine-to-tryptophan ratio than uninfected individuals (P < .001). In PWH, increase in waist-to-hip ratio was associated with higher kynurenine-to-tryptophan ratio (P = .009) and quinolinic-to-kynurenic acid ratio (P = .006) and lower kynurenic acid concentration (P = .019). Quinolinic-to-kynurenic acid ratio was associated with higher hs-CRP (P < .001) and neopterin concentrations (P < .001), while kynurenic acid was associated with lower hs-CRP (P = .025) and neopterin concentrations (P = .034). CONCLUSIONS In PWH, increase in abdominal adipose tissue was associated with increased quinolinic-to-kynurenic acid ratio, suggesting activation of proinflammatory pathway of kynurenine metabolism, with reduction of anti-inflammatory molecules and increase in systemic inflammation. Our results suggest dysregulation of kynurenine metabolism associated with abdominal fat accumulation to be a potential source of inflammation in HIV infection.
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Affiliation(s)
- Marco Gelpi
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Per Magne Ueland
- Section for Pharmacology, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Marius Trøseid
- Section of Clinical Immunology and Infectious Diseases, University Hospital Rikshospitalet, Oslo, Norway
| | - Amanda Mocroft
- HIV Epidemiology and Biostatistics Unit, Department of Infection and Population Health, University College London, London, United Kingdom
| | - Anne-Mette Lebech
- Department of Infectious Diseases, Hvidovre Hospital, Copenhagen University Hospital, Copenhagen, Denmark
| | - Henrik Ullum
- Department of Clinical Immunology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Øivind Midttun
- Section for Pharmacology, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Jens Lundgren
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.,Centre of Excellence for Health, Immunity and Infections, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Susanne D Nielsen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
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16
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Jennings A, Koch M, Jensen MK, Bang C, Kassubek J, Müller HP, Nöthlings U, Franke A, Lieb W, Cassidy A. The role of the gut microbiome in the association between habitual anthocyanin intake and visceral abdominal fat in population-level analysis. Am J Clin Nutr 2020; 111:340-350. [PMID: 31826255 PMCID: PMC6997102 DOI: 10.1093/ajcn/nqz299] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/12/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Flavonoid intake modifies the composition of the gut microbiome, which contributes to the metabolism of flavonoids. Few studies have examined the contribution of the gut microbiome to the health benefits associated with flavonoid intake. OBJECTIVES We aimed to examine associations between habitual intakes of flavonoid subclasses and MRI-determined visceral (VAT) and subcutaneous (SAT) adipose tissue. Uniquely, we also identified associations between the aforementioned measurements and gut microbiome composition sequenced from 16S ribosomal RNA genes. METHODS We undertook cross-sectional analyses of 618 men and women (n = 368 male), aged 25-83 y, from the PopGen cohort. RESULTS Higher intake of anthocyanins was associated with lower amounts of VAT [tertile (T)3-T1: -0.49 dm3; β: -8.9%; 95% CI: -16.2%, -1.1%; P = 0.03] and VAT:SAT ratio (T3-T1: -0.04; β: -7.1%; 95% CI: -13.5%, -0.3%; P = 0.03). Higher intakes of anthocyanin-rich foods were also inversely associated with VAT [quantile (Q)4-Q1: -0.39 dm3; β: -9.9%; 95% CI: -17.4%, -1.6%; P = 0.02] and VAT:SAT ratio (Q4-Q1: -0.04; β: -6.5%; 95% CI: -13.3%, -0.9%; P = 0.03). Participants with the highest intakes of anthocyanin-rich foods also had higher microbial diversity (Q4-Q1: β: 0.18; 95% CI: 0.06, 0.31; P < 0.01), higher abundances of Clostridiales (Q4-Q1: β: 449; 95% CI: 96.3, 801; P = 0.04) and Ruminococcaceae (Q4-Q1: β: 313; 95% CI: 33.6, 591; P = 0.04), and lower abundance of Clostridium XIVa (Q4-Q1: β: -41.1; 95% CI: -72.4, -9.8; P = 0.04). Participants with the highest microbial diversity, abundances of Clostridiales and Ruminococcaceae, and lower abundance of Clostridium XIVa had lower amounts of VAT. Up to 18.5% of the association between intake of anthocyanin-rich foods and VAT could be explained by the gut microbiome. CONCLUSIONS These novel data suggest that higher microbial diversity and abundance of specific taxa in the Clostridiales order may contribute to the association between higher intake of anthocyanins and lower abdominal adipose tissue.
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Affiliation(s)
- Amy Jennings
- Department of Nutrition and Preventive Medicine, Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Manja Koch
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, MA, USA
- Institute of Epidemiology, Kiel University, Kiel, Germany
| | - Majken K Jensen
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, MA, USA
- Department of Medicine, Channing Division of Network Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, MA, USA
| | - Corinna Bang
- Institute of Clinical Molecular Biology, Kiel University, Kiel, Germany
| | - Jan Kassubek
- Department of Neurology, University of Ulm, Ulm, Germany
| | | | - Ute Nöthlings
- Department of Nutrition and Food Sciences, University of Bonn, Bonn, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology, Kiel University, Kiel, Germany
| | - Wolfgang Lieb
- Institute of Epidemiology, Kiel University, Kiel, Germany
- Biobank PopGen, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Aedín Cassidy
- Institute for Global Food Security, Queen's University Belfast, Belfast, United Kingdom
- Address correspondence to AC (e-mail: )
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Varela-Rodríguez BM, Juiz-Valiña P, Varela L, Outeiriño-Blanco E, Bravo SB, García-Brao MJ, Mena E, Noguera JF, Valero-Gasalla J, Cordido F, Sangiao-Alvarellos S. Beneficial Effects of Bariatric Surgery-Induced by Weight Loss on the Proteome of Abdominal Subcutaneous Adipose Tissue. J Clin Med 2020; 9:jcm9010213. [PMID: 31941045 PMCID: PMC7019912 DOI: 10.3390/jcm9010213] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/20/2019] [Accepted: 01/08/2020] [Indexed: 12/16/2022] Open
Abstract
Bariatric surgery (BS) is the most effective treatment for obesity and has a positive impact on cardiometabolic risk and in the remission of type 2 diabetes. Following BS, the majority of fat mass is lost from the subcutaneous adipose tissue depot (SAT). However, the changes in this depot and functions and as well as its relative contribution to the beneficial effects of this surgery are still controversial. With the aim of studying altered proteins and molecular pathways in abdominal SAT (aSAT) after body weight normalization induced by BS, we carried out a proteomic approach sequential window acquisition of all theoretical mass spectra (SWATH-MS) analysis. These results were complemented by Western blot, electron microscopy and RT-qPCR. With all of the working tools mentioned, we confirmed that after BS, up-regulated proteins were associated with metabolism, the citric acid cycle and respiratory electron transport, triglyceride catabolism and metabolism, formation of ATP, pyruvate metabolism, glycolysis/gluconeogenesis and thermogenesis among others. In contrast, proteins with decreased values are part of the biological pathways related to the immune system. We also confirmed that obesity caused a significant decrease in mitochondrial density and coverage, which was corrected by BS. Together, these findings reveal specific molecular mechanisms, genes and proteins that improve adipose tissue function after BS characterized by lower inflammation, increased glucose uptake, higher insulin sensitivity, higher de novo lipogenesis, increased mitochondrial function and decreased adipocyte size.
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Affiliation(s)
- Bárbara María Varela-Rodríguez
- Endocrine, Nutritional and Metabolic Diseases Group, Faculty of Health Sciences, Universidade da Coruña, Campus de Oza, 15006 A Coruña, Spain; (B.M.V.-R.); (P.J.-V.); (F.C.)
- INIBIC (Instituto de Investigación Biomédica de A Coruña), Xubias de Arriba, 84. 15006 A Coruña, Spain
- CICA (Centro de Investigaciones Científicas Avanzadas), As Carballeiras, s/n Campus de, San Vicente de Elviña, 15008 A Coruña, Spain
| | - Paula Juiz-Valiña
- Endocrine, Nutritional and Metabolic Diseases Group, Faculty of Health Sciences, Universidade da Coruña, Campus de Oza, 15006 A Coruña, Spain; (B.M.V.-R.); (P.J.-V.); (F.C.)
- INIBIC (Instituto de Investigación Biomédica de A Coruña), Xubias de Arriba, 84. 15006 A Coruña, Spain
- CICA (Centro de Investigaciones Científicas Avanzadas), As Carballeiras, s/n Campus de, San Vicente de Elviña, 15008 A Coruña, Spain
| | - Luis Varela
- Program in Integrative Cell Signaling and Neurobiology of Metabolism, Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT 06520, USA;
| | - Elena Outeiriño-Blanco
- Department of Endocrinology, Hospital Universitario A Coruña, A Coruña, 15006 A Coruña, Spain;
| | - Susana Belén Bravo
- Proteomic Unit, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, 15705 A Coruña, Spain;
| | - María Jesús García-Brao
- Department of Digestive and General Surgery, Hospital Universitario A Coruña, 15006 A Coruña, Spain; (M.J.G.-B.); (E.M.); (J.F.N.)
| | - Enrique Mena
- Department of Digestive and General Surgery, Hospital Universitario A Coruña, 15006 A Coruña, Spain; (M.J.G.-B.); (E.M.); (J.F.N.)
| | - José Francisco Noguera
- Department of Digestive and General Surgery, Hospital Universitario A Coruña, 15006 A Coruña, Spain; (M.J.G.-B.); (E.M.); (J.F.N.)
| | - Javier Valero-Gasalla
- Department of Plastic, Reconstructive & Aesthetic Surgery. Hospital Universitario A Coruña, 15006 A Coruña, Spain;
| | - Fernando Cordido
- Endocrine, Nutritional and Metabolic Diseases Group, Faculty of Health Sciences, Universidade da Coruña, Campus de Oza, 15006 A Coruña, Spain; (B.M.V.-R.); (P.J.-V.); (F.C.)
- INIBIC (Instituto de Investigación Biomédica de A Coruña), Xubias de Arriba, 84. 15006 A Coruña, Spain
- CICA (Centro de Investigaciones Científicas Avanzadas), As Carballeiras, s/n Campus de, San Vicente de Elviña, 15008 A Coruña, Spain
- Department of Endocrinology, Hospital Universitario A Coruña, A Coruña, 15006 A Coruña, Spain;
| | - Susana Sangiao-Alvarellos
- Endocrine, Nutritional and Metabolic Diseases Group, Faculty of Health Sciences, Universidade da Coruña, Campus de Oza, 15006 A Coruña, Spain; (B.M.V.-R.); (P.J.-V.); (F.C.)
- INIBIC (Instituto de Investigación Biomédica de A Coruña), Xubias de Arriba, 84. 15006 A Coruña, Spain
- CICA (Centro de Investigaciones Científicas Avanzadas), As Carballeiras, s/n Campus de, San Vicente de Elviña, 15008 A Coruña, Spain
- Correspondence:
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18
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Cerit Z. Like two peas in a pod: abdominal and epicardial adipose tissue. J Pediatr 2017; 184:239. [PMID: 28063692 DOI: 10.1016/j.jpeds.2016.12.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 12/14/2016] [Indexed: 11/19/2022]
Affiliation(s)
- Zeynep Cerit
- Department of Pediatrics Near East University Hospital Nicosia, Cyprus
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19
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Morrison SA, Goss AM, Azziz R, Raju DA, Gower BA. Peri-muscular adipose tissue may play a unique role in determining insulin sensitivity/resistance in women with polycystic ovary syndrome. Hum Reprod 2016; 32:185-192. [PMID: 27827322 DOI: 10.1093/humrep/dew279] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/22/2016] [Accepted: 10/11/2016] [Indexed: 12/24/2022] Open
Abstract
STUDY QUESTION Do the determinants of insulin sensitivity/resistance differ in women with and without polycystic ovary syndrome (PCOS)? SUMMARY ANSWER Peri-muscular thigh adipose tissue is uniquely associated with insulin sensitivity/resistance in women with PCOS, whereas adiponectin and thigh subcutaneous adipose are the main correlates of insulin sensitivity/resistance in women without PCOS. WHAT IS KNOWN ALREADY In subject populations without PCOS, insulin sensitivity/resistance is determined by body fat distribution and circulating concentrations of hormones and pro-inflammatory mediators. Specifically, visceral (intra-abdominal) adipose tissue mass is adversely associated with insulin sensitivity, whereas thigh subcutaneous adipose appears protective against metabolic disease. Adiponectin is an insulin-sensitizing hormone produced by healthy subcutaneous adipose that may mediate the protective effect of thigh subcutaneous adipose. Testosterone, which is elevated in PCOS, may have an adverse effect on insulin sensitivity/resistance. STUDY DESIGN, SIZE, DURATION Cross-sectional study of 30 women with PCOS and 38 women without PCOS; data were collected between 2007 and 2011. PARTICIPANTS/MATERIALS, SETTING, METHODS Participants were group-matched for obesity, as reflected in BMI (Mean ± SD; PCOS: 31.8 ± 6.0 kg/m2; without PCOS: 31.5 ± 5.0 kg/m2). The whole-body insulin sensitivity index (WBISI) was assessed using a mixed-meal tolerance test; Homeostasis Model Assessment-Insulin resistance (HOMA-IR) was determined from fasting insulin and glucose values. Adipose tissue distribution was determined by computed tomography (CT) scan. Partial correlation analysis, adjusting for total fat mass, was used to identify correlates of WBISI and HOMA-IR within each group of women from measures of body composition, body fat distribution, reproductive-endocrine hormones and adipokines/cytokines. Stepwise multiple linear regression analysis was used to identify the variables that best predicted WBISI and HOMA-IR. MAIN RESULTS AND THE ROLE OF CHANCE Among women with PCOS, both WBISI and HOMA-IR were best predicted by peri-muscular adipose tissue cross-sectional area. Among women without PCOS, both WBISI and HOMA-IR were best predicted by adiponectin and thigh subcutaneous adipose tissue. LIMITATIONS, REASONS FOR CAUTION Small sample size, group matching for BMI and age, and the use of surrogate measures of insulin sensitivity/resistance. WIDER IMPLICATIONS OF THE FINDINGS Because insulin resistance is the root cause of obesity and comorbidities in PCOS, determining its cause could lead to potential therapies. Present results suggest that peri-muscular adipose tissue may play a unique role in determining insulin sensitivity/resistance in women with PCOS. Interventions such as restriction of dietary carbohydrates that have been shown to selectively reduce fatty infiltration of skeletal muscle may decrease the risk for type 2 diabetes in women with PCOS. STUDY FUNDING/COMPETING INTERESTS The study was supported by National Institutes of Health grants R01HD054960, R01DK67538, P30DK56336, P60DK079626, M014RR00032 and UL1RR025777. The authors have no conflicts of interest. TRIAL REGISTRATION NUMBER NCT00726908.
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Affiliation(s)
- Shannon A Morrison
- Department of Families, Communities, and Health Systems, School of Nursing, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Amy M Goss
- Department of Nutrition Sciences, School of Health Professions, University of Alabama at Birmingham, 616A Webb Building, 1675 University Blvd, Birmingham, AL 35294, USA
| | - Ricardo Azziz
- Departments of Obstetrics/Gynecology and Medicine, Augusta University, Augusta, GA 30912, USA
| | - Dheeraj A Raju
- Department of Families, Communities, and Health Systems, School of Nursing, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Barbara A Gower
- Department of Nutrition Sciences, School of Health Professions, University of Alabama at Birmingham, 616A Webb Building, 1675 University Blvd, Birmingham, AL 35294, USA
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20
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Sun J, Xu B, Freeland-Graves J. Automated quantification of abdominal adiposity by magnetic resonance imaging. Am J Hum Biol 2016; 28:757-766. [PMID: 27121449 PMCID: PMC5085897 DOI: 10.1002/ajhb.22862] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 01/27/2016] [Accepted: 04/06/2016] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVES To develop a fully-automated algorithm to process axial magnetic resonance imaging (MRI) slices for quantifying abdominal visceral, subcutaneous and total adipose tissues, i.e., VAT, SAT, and TAT, without human intervention or prior knowledge. MATERIALS AND METHODS Fat regions in single MRI slice or sequence (20 slices) were identified with image processing techniques including region-growing, inhomogeneity correction, fuzzy c-means clustering, and active contours segmentation. The MR images of 85 subjects (60 males and 25 females), whose body mass index (BMI) values ranged from 19.96 to 40.35 kg/m2 , were analyzed using the fully-automated algorithm-the automatic method developed in the research and the widely used semi-automated software (sliceOmatic® Tomovision, Inc.)-the reference method. RESULTS The proposed automated method showed good performance against the reference method to quantify adipose tissues in both single umbilical slice and MRI sequence. The square of the Pearson correlation coefficients (R2 ) based on the results generated from the two methods for VAT/SAT/TAT were 0.977/0.998/0.997 for single slice data and 0.995/0.999/0.999 for volumetric data. The intra-class correlation of visceral adipose tissue (VAT) between the three operators was 0.939 in the reference method, which was improved to 0.999 in the automatic method. The adipose tissue measurements in the slice at Lumbar 3 vertebra have the highest correlation with the total fat volumes across the entire abdomen. CONCLUSION The fully-automated algorithm presented in the paper provides an accurate and reliable assessment of abdominal fat without human intervention. Am. J. Hum. Biol. 28:757-766, 2016. © 2016Wiley Periodicals, Inc.
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Affiliation(s)
- Jingjing Sun
- Department of Biomedical Engineering, University of Texas, Austin, TX, USA
| | - Bugao Xu
- Department of Biomedical Engineering, University of Texas, Austin, TX, USA
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21
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Domínguez Hernández C, Klünder Klünder M, Huang F, Flores Armas EM, Velázquez-López L, Medina-Bravo P. Association between abdominal fat distribution, adipocytokines and metabolic alterations in obese low-birth-weight children. Pediatr Obes 2016; 11:285-91. [PMID: 26247536 DOI: 10.1111/ijpo.12060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 07/06/2015] [Indexed: 11/29/2022]
Abstract
BACKGROUND In addition to obesity, low birth weight (LBW) has been proposed as another independent risk factor associated with cardiovascular disease and type 2 diabetes mellitus. OBJECTIVE This study aimed to evaluate the influence of birth weight on abdominal fat distribution, adipocytokine levels and associated metabolic alterations in obese children. METHODS A cross-sectional study was conducted in 92 children. Children were divided into three groups according to their body mass index and birth weight. Glucose and insulin (0 and 120 min), lipid profile and adipocytokines were measured. Abdominal fat distribution was assessed by magnetic resonance imaging. RESULTS Obese LBW children had higher fasting glucose (P = 0.054) and insulin (P < 0.001), and 120 min glucose (P < 0.001) and insulin levels (P < 0.001), such as increased HOMA-IR (homeostasis model assessment of insulin resistance index) (P < 0.001). Obesity and LBW were associated with lower concentrations of high molecular weight (HMW) adiponectin (-2.38 [IC 95% -4.27; -0.42, P = 0.018]) and higher subcutaneous adipose tissue (SAT) (28.05 [IC 95% 0.40; 55.7, P = 0.047]) compared with NBW obese children, independent of age or sex. CONCLUSIONS LBW in obese children is associated with lower HMW adiponectin, increased insulin resistance and greater SAT.
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Affiliation(s)
- C Domínguez Hernández
- Endocrinology Department, Hospital Infantil de México Federico Gómez, Distrito Federal, Mexico
| | - M Klünder Klünder
- Community Health Research Department, Hospital Infantil de México Federico Gómez, Distrito Federal, Mexico
| | - F Huang
- Pharmacology Department, Hospital Infantil de México Federico Gómez, Distrito Federal, Mexico
| | - E M Flores Armas
- Radiology Department, Hospital Infantil de México Federico Gómez, Distrito Federal, Mexico
| | - L Velázquez-López
- Clinical Epidemiology Research Unit, Hospital Regional General No. 1 Carlos McGregor Sánchez-Navarro, Instituto Mexicano del Seguro Social, Distrito Federal, Mexico
| | - P Medina-Bravo
- Endocrinology Department, Hospital Infantil de México Federico Gómez, Distrito Federal, Mexico
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Rajjo TI, Harteneck DA, Jensen MD. Direct free fatty acid storage in different sized adipocytes from the same depot. Obesity (Silver Spring) 2014; 22:1275-9. [PMID: 24639405 PMCID: PMC4008637 DOI: 10.1002/oby.20673] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 11/21/2013] [Accepted: 11/30/2013] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Human adipocytes take up free fatty acids (FFA) directly from the circulation, even at times of high lipolytic activity. Whether these processes occurs simultaneously within the same cells or are partitioned between different cells, for example large and small cells, is unknown. METHODS The direct FFA storage in subcutaneous fat in 13 adults were measured using a continuous infusion of [U-(13)C]palmitate and a bolus of [1-(14)C]palmitate followed 30 min later by abdominal and femoral adipose biopsies. The adipocytes were isolated by digestion procedures and separated into small, medium and large populations by differential floatation. RESULTS Populations of adipocytes were isolated that were statistically and clinically (∼3 fold different) in size. Adipocyte lipid SA was not different between small, medium and large cells, therefore, FFA storage per unit lipid was not different. However, FFA storage rates were significantly (two to four times) greater per cell in large than small cells (P < 0.005). In summary, relative to lipid content, FFA storage rates are not different in large and small adipocytes, however, large cells have greater storage rates per cell. CONCLUSIONS This suggests that the processes of FFA release and storage are taking place simultaneously in adipocytes.
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Affiliation(s)
| | | | - Michael D. Jensen
- Corresponding author: Michael D. Jensen, M.D., Mayo Clinic, Endocrine Research Unit, 200 1st Street SW, Rm 50194 Joseph, Rochester, MN 55905, telephone - 507 255-6515, fax - 507 255-4828,
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Tanida M, Imanishi K, Komatsu M, Satomi J, Yamamoto N, Wang M, Kurata Y, Shibamoto T. Soy isoflavone affects the autonomic nervous system in a tissue-specific manner in anesthetized rats. Exp Biol Med (Maywood) 2014; 239:477-83. [PMID: 24586098 DOI: 10.1177/1535370213519197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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] [Indexed: 11/17/2022] Open
Abstract
We examined and compared the effects of taste stimulation by soy saponin as well as soy isoflavone and intragastric (IG) injection of both on the autonomic nerve activities and feeding behavior in rats. We found that taste stimulation by soy saponin or soy isoflavone-rich solution (SIRS) did not affect the activity of the sympathetic nerve supplying the adrenal gland in urethane-anesthetized rats; however, IG injection of SIRS, but not soy saponin, stimulated the adrenal sympathetic nerve activity (ASNA) in a dose-dependent manner. Moreover, IG injection of SIRS significantly suppressed the activity of the vagus nerve innervating the stomach, whereas sympathetic nerve outflows to brown or white adipose tissue were not affected by IG injection of SIRS. To test the involvement of the afferent autonomic nerve in the abdominal organs for regulation of the efferent ASNA by SIRS, we examined the response of the adrenal sympathetic innervation to SIRS injection in rats with ablated afferent vagus or afferent sympathetic nerves. The activating effect of SIRS on the ASNA was inhibited in sympathectomized rats but not in vagotomized rats. Thus, our data suggest that soy isoflavone might affect tissue-specific autonomic nerves through the afferent sympathetic nerve pathway.
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Affiliation(s)
- Mamoru Tanida
- Department of Physiology II, Kanazawa Medical University, Uchinada Ishikawa 920-0293, Japan
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24
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Abstract
OBJECTIVE This cross-sectional study compares the relationship of visceral and total abdominal adipose tissue (VAT and TAAT) measurements obtained with magnetic resonance imaging (MRI) and a range of 'simpler' techniques suitable for field or bedside use: BMI, waist circumference (WC), bioelectrical impedance (BIA) devices and dual X-ray absorptiometry (DXA). METHOD 120 participants were recruited, stratified by gender and BMI (20 men and 20 women within each group: lean, overweight and obese). Measurements included height, weight, WC (at midpoint), DXA L2-L4 fat, and BIA (two whole-body and one abdominal device). MRI was used as the reference. RESULTS MRI data showed that men have more VAT than women, (mean 147 vs. 93 cm(2)) despite less TAAT (362 vs. 405 cm(2)). Correlations of simpler abdominal fat measures showed significantly higher correlations with TAAT than with VAT in men and women. Similarly, trunk and whole-body fat measures were significantly more strongly correlated with TAAT than with VAT. CONCLUSION None of the simpler techniques show strong correlations with VAT measured by MRI, but WC, abdominal BIA 'visceral fat level' and DXA L2-L4 fat all show similar and strong correlations with TAAT and may be useful in large scale surveys.
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Affiliation(s)
- Lucy M Browning
- MRC Human Nutrition Research, Elsie Widdowson Laboratory, Cambridge, UK.
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