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Cohen CC, Harrall KK, Hu H, Glueck DH, Perng W, Shankar K, Dabelea D. Associations of infant feeding practices with abdominal and hepatic fat measures in childhood in the longitudinal Healthy Start Study. Am J Clin Nutr 2024; 119:560-568. [PMID: 38000661 PMCID: PMC10884608 DOI: 10.1016/j.ajcnut.2023.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/16/2023] [Accepted: 11/21/2023] [Indexed: 11/26/2023] Open
Abstract
BACKGROUND Infant feeding patterns have been linked with obesity risk in childhood, but associations with precise measures of body fat distribution are unclear. OBJECTIVE We examined associations of infant feeding practices with abdominal fat and hepatic fat trajectories in childhood. METHODS This study included 356 children in the Healthy Start Study, a prospective prebirth cohort in Colorado. Infant feeding practices were assessed by postnatal interviews and categorized as any human milk <6 mo compared with ≥6 mo; complementary foods introduced ≤4 mo compared with >4 mo; soda introduced ≤18 mo compared with >18 mo. Abdominal subcutaneous (SAT) and visceral adipose tissue (VAT) areas and hepatic fat (%) were assessed by magnetic resonance imaging in early and middle childhood (median 5 and 9 y old, respectively). We examined associations of infant feeding with adiposity trajectories across childhood using linear mixed models. RESULTS In the sample of children, 67% consumed human milk ≥6 mo, 75% were introduced to complementary foods at >4 mo, and 81% were introduced to soda at >18 mo. We did not find any associations between duration of any human milk consumption and childhood adiposity trajectories. Early introduction to complementary foods (≤4 mo) was associated with faster rates of change for SAT and VAT during childhood (Slope [95% CI]: 15.1 [10.7,19.4] cm2/y for SAT; 2.5 [1.9,2.9] cm2/y for VAT), compared with introduction at >4 mo (5.5 [3.0,8.0] cm2/y and 1.6 [1.3,1.9] cm2/y, respectively). Similarly, early introduction to soda (≤18 mo) was associated with faster rates of change for all 3 outcomes during childhood (Slope [95% CI]: 20.6 [15.0,26.1] cm2/y for SAT, 2.7 [2.0,3.3] cm2/y for VAT, 0.3 [0.1,0.5] %/year for hepatic fat) compared with delayed introduction (5.4 [2.8,8.0] cm2/y, 1.7 [1.3, 2.0] cm2/y, -0.1 [-0.2,0.0] %/y, respectively). CONCLUSIONS The timing of introduction and quality of complementary foods in infancy was associated with rates of abdominal and hepatic fat accrual during childhood. Experimental studies are needed to assess underlying mechanisms.
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Affiliation(s)
- Catherine C Cohen
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, United States; Department of Pediatrics, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States.
| | - Kylie K Harrall
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Houchun Hu
- Department of Radiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Deborah H Glueck
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, United States; Department of Pediatrics, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Wei Perng
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, United States; Department of Epidemiology, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Kartik Shankar
- Department of Pediatrics, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Dana Dabelea
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, United States; Department of Pediatrics, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States; Department of Epidemiology, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
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Miao JX, Xu JP, Wang R, Xu YX, Xu F, Wang CH, Yu C, Zhang DM, Su JB. Connections between body composition and dysregulation of islet α- and β-cells in type 2 diabetes. Diabetol Metab Syndr 2024; 16:11. [PMID: 38191505 PMCID: PMC10775650 DOI: 10.1186/s13098-023-01250-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 12/29/2023] [Indexed: 01/10/2024] Open
Abstract
BACKGROUND Accompanying islet α- and β-cell dysregulation in type 2 diabetes (T2D) at the microscopic scale, alterations in body composition at the macroscopic scale may affect the pathogenesis of T2D. However, the connections between body composition and islet α-cell and β-cell functions in T2D have not been thoroughly explored. METHODS For this cross-sectional study, we recruited a total of 729 Chinese Han patients with T2D in a consecutive manner. Dual-energy X-ray absorptiometry (DXA) was used to measure body composition, which included total bone-free mass, total fat and lean mass, trunk fat and lean mass and limb fat and lean mass. Every patient underwent an oral glucose tolerance test to simultaneously detect glucose, C-peptide and glucagon. The indices of islet α-cell function included fasting glucagon levels and the area under the curve of glucagon after a challenge (AUCglucagon), while the indices of β-cell function included the insulin sensitivity index derived from C-peptide (ISIC-peptide) and the area under the curve of C-peptide after a challenge (AUCC-peptide). RESULTS Among all patients, fat mass, especially trunk fat mass, was significantly correlated with ISIC-peptide and AUCC-peptide levels (r = - 0.330 and 0.317, respectively, p < 0.001), while lean mass, especially limb lean mass, was significantly correlated with fasting glucagon and AUCglucagon levels (r = - 0.196 and - 0.214, respectively, p < 0.001). Moreover, after adjusting for other relevant variables via multivariate linear regression analysis, increased trunk fat mass was independently associated with decreased ISIC-peptide (β = - 0.247, t = - 3.628, p < 0.001, partial R2 = 10.9%) and increased AUCC-peptide (β = 0.229, t = 3.581, p < 0.001, partial R2 = 8.2%), while decreased limb lean mass was independently associated with increased fasting glucagon (β = - 0.226, t = - 2.127, p = 0.034, partial R2 = 3.8%) and increased AUCglucagon (β = - 0.218, t = - 2.050, p = 0.041, partial R2 = 2.3%). Additionally, when separate analyses were performed with the same concept for both sexes, we found that increased trunk fat mass was still independently associated with decreased ISIC-peptide and increased AUCC-peptide, while decreased limb lean mass was still independently associated with increased fasting glucagon and AUCglucagon. CONCLUSIONS Increased trunk fat mass may partly account for decreased insulin sensitivity and increased insulin secretion, while decreased limb lean mass may be connected to increased fasting glucagon and postprandial glucagon secretion.
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Affiliation(s)
- Jia-Xi Miao
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China
| | - Jia-Ping Xu
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China
| | - Rui Wang
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China
| | - Yu-Xian Xu
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China
| | - Feng Xu
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China
| | - Chun-Hua Wang
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China
| | - Chao Yu
- Department of Clinical Laboratory, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China
| | - Dong-Mei Zhang
- Medical Research Center, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China
| | - Jian-Bin Su
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong, No.666 Shengli Road, Nantong, 226001, China.
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3
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Reynolds KM, Horimoto ARVR, Lin BM, Zhang Y, Kurniansyah N, Yu B, Boerwinkle E, Qi Q, Kaplan R, Daviglus M, Hou L, Zhou LY, Cai J, Shaikh SR, Sofer T, Browning SR, Franceschini N. Ancestry-driven metabolite variation provides insights into disease states in admixed populations. Genome Med 2023; 15:52. [PMID: 37461045 PMCID: PMC10351197 DOI: 10.1186/s13073-023-01209-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 07/10/2023] [Indexed: 07/20/2023] Open
Abstract
BACKGROUND Metabolic pathways are related to physiological functions and disease states and are influenced by genetic variation and environmental factors. Hispanics/Latino individuals have ancestry-derived genomic regions (local ancestry) from their recent admixture that have been less characterized for associations with metabolite abundance and disease risk. METHODS We performed admixture mapping of 640 circulating metabolites in 3887 Hispanic/Latino individuals from the Hispanic Community Health Study/Study of Latinos (HCHS/SOL). Metabolites were quantified in fasting serum through non-targeted mass spectrometry (MS) analysis using ultra-performance liquid chromatography-MS/MS. Replication was performed in 1856 nonoverlapping HCHS/SOL participants with metabolomic data. RESULTS By leveraging local ancestry, this study identified significant ancestry-enriched associations for 78 circulating metabolites at 484 independent regions, including 116 novel metabolite-genomic region associations that replicated in an independent sample. Among the main findings, we identified Native American enriched genomic regions at chromosomes 11 and 15, mapping to FADS1/FADS2 and LIPC, respectively, associated with reduced long-chain polyunsaturated fatty acid metabolites implicated in metabolic and inflammatory pathways. An African-derived genomic region at chromosome 2 was associated with N-acetylated amino acid metabolites. This region, mapped to ALMS1, is associated with chronic kidney disease, a disease that disproportionately burdens individuals of African descent. CONCLUSIONS Our findings provide important insights into differences in metabolite quantities related to ancestry in admixed populations including metabolites related to regulation of lipid polyunsaturated fatty acids and N-acetylated amino acids, which may have implications for common diseases in populations.
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Affiliation(s)
- Kaylia M Reynolds
- Department of Biostatistics, University of North Carolina, Chapel Hill, NC, USA
- Department of Epidemiology, University of North Carolina, 123 W Franklin St, Suite 401, NC, NC 27516, Chapel Hill, USA
| | | | - Bridget M Lin
- Department of Biostatistics, University of North Carolina, Chapel Hill, NC, USA
| | - Ying Zhang
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA, USA
| | - Nuzulul Kurniansyah
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA, USA
| | - Bing Yu
- Human Genetics Center, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Eric Boerwinkle
- Human Genetics Center, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Qibin Qi
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Robert Kaplan
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY, USA
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Martha Daviglus
- Institute for Minority Health Research, University of Illinois at Chicago, Chicago, IL, USA
| | - Lifang Hou
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Laura Y Zhou
- Department of Biostatistics, University of North Carolina, Chapel Hill, NC, USA
| | - Jianwen Cai
- Department of Biostatistics, University of North Carolina, Chapel Hill, NC, USA
| | - Saame Raza Shaikh
- Department of Nutrition, University of North Carolina, Chapel Hill, NC, USA
| | - Tamar Sofer
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA, USA
- Departments of Medicine and Biostatistics, Harvard University, Boston, MA, USA
| | - Sharon R Browning
- Department of Biostatistics, University of Washington, Seattle, WA, USA
| | - Nora Franceschini
- Department of Epidemiology, University of North Carolina, 123 W Franklin St, Suite 401, NC, NC 27516, Chapel Hill, USA.
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4
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Hatano Y, VanWagner LB, Carnethon MR, Bancks MP, Carson AP, Lloyd-Jones DM, Østbye T, Viera AJ, Yano Y. Racial difference in the association between non-alcoholic fatty liver disease and incident type 2 diabetes: findings from the CARDIA study. Diabetologia 2023; 66:1235-1246. [PMID: 36941389 PMCID: PMC10286118 DOI: 10.1007/s00125-023-05903-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 01/31/2023] [Indexed: 03/23/2023]
Abstract
AIMS/HYPOTHESIS Type 2 diabetes and non-alcoholic fatty liver disease (NAFLD) are prevalent diseases of metabolic origin. We examined the association between NAFLD and the development of type 2 diabetes among non-Asian adults, and whether the association differs by race. METHODS We analysed data from the Coronary Artery Risk Development in Young Adults (CARDIA) study, a population-based prospective cohort study. Participants underwent non-contrast abdominal computed tomography (CT) at baseline (2010-2011) and assessment of glucose measures at the follow-up exam (2015-2016). NAFLD was defined as liver attenuation ≤51 Hounsfield units on CT images after exclusion for other liver fat causes. Race was self-reported. We used targeted maximum likelihood estimation (TMLE) with machine-learning algorithms to estimate difference in type 2 diabetes risk between the NAFLD and non-NAFLD groups. RESULTS Of the 1995 participants without type 2 diabetes at baseline (mean age±SD, 50.0±3.6 years; 59% women; 55.0% White and 45.0% Black), 21.7% of White and 16.8% of Black participants had NAFLD at baseline, and 3.7% of White and 8.0% of Black participants developed type 2 diabetes at follow up. After multivariable adjustment, risk difference for type 2 diabetes associated with NAFLD vs no NAFLD was 4.1% (95% CI 0.3%, 7.9%) among White participants and -1.9% (95% CI -5.7%, 2.0%) in Black participants. CONCLUSIONS/INTERPRETATION NAFLD was associated with a higher risk of type 2 diabetes among White participants but not among Black participants. This finding suggests that the effect of liver fat on impaired glucose metabolism may be smaller in Black than in White individuals.
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Affiliation(s)
- Yu Hatano
- Department of Family Medicine and Community Health, Duke University, Durham, NC, USA.
| | - Lisa B VanWagner
- Division of Digestive Liver Diseases, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Mercedes R Carnethon
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Michael P Bancks
- Department of Epidemiology and Prevention, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - April P Carson
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA
| | - Donald M Lloyd-Jones
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Truls Østbye
- Department of Family Medicine and Community Health, Duke University, Durham, NC, USA
| | - Anthony J Viera
- Department of Family Medicine and Community Health, Duke University, Durham, NC, USA
| | - Yuichiro Yano
- Department of Family Medicine and Community Health, Duke University, Durham, NC, USA
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Vidmar AP, Durazo-Arvizu R, Weigensberg MJ, Alderete TL, Goran MI. Rapid Decline in β-Cell Function and Increasing Adiposity Are Associated With Conversion to Type 2 Diabetes in At-Risk Latino Youth. Diabetes 2023; 72:735-745. [PMID: 36972018 PMCID: PMC10202769 DOI: 10.2337/db22-1034] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 03/22/2023] [Indexed: 04/16/2023]
Abstract
Youth-onset type 2 diabetes (T2D) is becoming increasingly prevalent, especially among Latino youth, and there is limited information on its pathophysiology and causative factors. Here, we describe findings from a longitudinal cohort study in 262 Latino children with overweight/obesity at risk of developing T2D with annual measures of oral and intravenous glucose tolerance (IVGTT), body composition, and fat distribution. Logistic binomial regression was used to identify significant predictors in those who developed T2D compared with matched control participants, and mixed-effects growth models were used to compare rates of change in metabolic versus adiposity measures between groups. Overall conversion rate to T2D at year 5 was 2% (n = 6). Rate of decline in disposition index (DI), measured with an IVGTT, over 5 years was three times higher in case patients (-341.7 units per year) compared with the extended cohort (-106.7 units per year) and 20 times higher compared with control participants (-15.2 units per year). Case patients had significantly higher annual increases in fasting glucose, hemoglobin A1c (HbA1c), waist circumference, and trunk fat, and there was an inverse correlation between rate of decline in DI and rates of increase in adiposity measures. T2D development in at-risk Latino youth is associated with a substantial and rapid decrease in DI that is directly correlated with increases in fasting glucose, HbA1c, and adiposity. ARTICLE HIGHLIGHTS Youth-onset type 2 diabetes is becoming increasingly prevalent, especially among Latino youth, and there is limited information on its pathophysiology and causative factors. Overall conversion rate to type 2 diabetes over 5 years was 2%. In youth who converted to type 2 diabetes, disposition index decreased rapidly by 85% compared with that in patients who did not convert during the study period. There was an inverse correlation between rate of decline in disposition index and rates of increase in various adiposity measures.
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Affiliation(s)
- Alaina P. Vidmar
- Division of Endocrinology, Department of Pediatrics, Saban Research Institute, Children’s Hospital Los Angeles, Los Angeles, CA
- Department of Pediatrics, Keck School of Medicine, Los Angeles, CA
| | - Ramon Durazo-Arvizu
- Southern California Clinical and Translational Science Institute Biostatistics Core, The Saban Research Institute, Children’s Hospital Los Angeles, Los Angeles, CA
| | - Marc J. Weigensberg
- Department of Pediatrics, University of Southern California, Los Angeles, CA
| | - Tanya L. Alderete
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO
| | - Michael I. Goran
- Division of Endocrinology, Department of Pediatrics, Saban Research Institute, Children’s Hospital Los Angeles, Los Angeles, CA
- Department of Pediatrics, Keck School of Medicine, Los Angeles, CA
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Pimentel JL, Vander Wyst KB, Soltero EG, Peña A, Hu HH, Bailey S, Pokorney A, Ayers S, Valencia AM, Olson ML, Shaibi GQ. Organ fat in Latino youth at risk for type 2 diabetes. Pediatr Diabetes 2022; 23:286-290. [PMID: 35001468 PMCID: PMC8983449 DOI: 10.1111/pedi.13311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/13/2021] [Accepted: 01/03/2022] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Obesity in youth increases the risk for type 2 diabetes (T2D) and elevated abdominal adipose tissue and organ fat may be particularly deleterious. The purpose of this study was to examine associations among measures of adiposity including total, visceral, and organ fat (hepatic and pancreatic) and whether these measures were independently associated with glycemia in Latino youth at risk for diabetes. METHODS Latino adolescents (47 boys and 32 girls, 13.7 ± 1.4 years) with obesity (BMIz 2.3 ± 0.3) were assessed for total fat by DXA and visceral and organ fat by 3 T magnetic resonance imaging. Glycemic indicators included HbA1c, fasting glucose (FG), and 2-h glucose (2-HrG) following an oral glucose tolerance test. Pearson correlations and stepwise linear regression analyses controlling for age and sex were used to examine independent associations between adiposity and glycemia. RESULTS Total fat was associated with visceral (r = 0.66, p = 0.001) and hepatic fat (r = 0.34, p < 0.01) while visceral fat was associated with hepatic (r = 0.42, p < 0.001) and pancreatic fat (r = 0.36, p < 0.001). In stepwise linear regression analysis, hepatic and pancreatic fat were significant predictors of FG, explaining 4.7% and 5.2% of the variance, respectively (total R2 = 0.14, p = 0.02). Hepatic fat was the only significant predictor of 2-HrG explaining 9.9% of the variance in the model (total R2 = 0.12, p = 0.03). No measure of adiposity was retained as a significant predictor of HbA1c. CONCLUSION Hepatic and pancreatic fat were the only adiposity measures independently associated with glycemia but the small amount of variance explained underscores the need for additional T2D biomarkers in high risk youth.
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Affiliation(s)
- Janiel L. Pimentel
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ,Division of Pediatric Endocrinology and Diabetes, Phoenix Children’s Hospital, Phoenix, AZ
| | - Kiley B. Vander Wyst
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ,Master of Public Health Program, College of Graduate Studies, Midwestern University, Glendale, AZ
| | - Erica G. Soltero
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ,Children’s Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Armando Peña
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ
| | - Houchun H. Hu
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ,Hyperfine, Inc., Guilford, CT
| | - Smita Bailey
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ,Department of Radiology, Phoenix Children’s Hospital, Phoenix, AZ
| | - Amber Pokorney
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ,Department of Radiology, Phoenix Children’s Hospital, Phoenix, AZ
| | - Stephanie Ayers
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ
| | - Ana Martinez Valencia
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ
| | - Micah L. Olson
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ,Division of Pediatric Endocrinology and Diabetes, Phoenix Children’s Hospital, Phoenix, AZ
| | - Gabriel Q. Shaibi
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ,Division of Pediatric Endocrinology and Diabetes, Phoenix Children’s Hospital, Phoenix, AZ
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7
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Hakim O, Bello O, Ladwa M, Shojaee-Moradie F, Jackson N, Peacock JL, Umpleby AM, Charles-Edwards G, Amiel SA, Goff LM. Adiponectin is associated with insulin sensitivity in white European men but not black African men. Diabet Med 2021; 38:e14571. [PMID: 33783876 DOI: 10.1111/dme.14571] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 03/15/2021] [Accepted: 03/27/2021] [Indexed: 02/06/2023]
Abstract
AIMS We aimed to assess ethnic differences in inflammatory markers and their relationships with insulin sensitivity and regional adiposity between white European and black African men. METHODS A total of 53 white European and 53 black African men underwent assessment of inflammatory markers alongside Dixon-magnetic resonance imaging to quantify subcutaneous and visceral adipose tissue and intrahepatic lipid. A hyperinsulinaemic-euglycaemic clamp was used to measure whole-body and adipose tissue insulin sensitivity. To assess ethnic differences in relationships, the statistical significance of an interaction term between adipokines and ethnic group was tested in multivariable regression models. RESULTS The black African men exhibited significantly lower adiponectin and tumour necrosis factor-α (TNF-α) and greater interleukin-10 (IL-10) compared to white European men (all p < 0.05). There were no statistically significant ethnic differences in leptin, resistin, IL-6, interferon-γ, IL-13, IL-1β, IL-8 and vascular endothelial growth factor. Several relationships differed significantly by ethnicity such that they were stronger in white European than black African men including IL-6 with visceral adipose tissue; adiponectin with subcutaneous adipose tissue; leptin with intrahepatic lipid; adiponectin, IL-6 and TNF-α with whole-body insulin sensitivity and TNF-α with adipose tissue insulin sensitivity (all pinteraction <0.05). Leptin significantly predicted whole-body insulin sensitivity in white European (R2 = 0.51) and black African (R2 = 0.29) men; however, adiponectin was a statistically significant predictor in only white European men (R2 = 0.22). CONCLUSIONS While adiponectin is lower in black African men, its insulin sensitising effects may be greater in white men suggesting that the role of adipokines in the development of type 2 diabetes may differ by ethnicity.
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Affiliation(s)
- Olah Hakim
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Oluwatoyosi Bello
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Meera Ladwa
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | | | - Nicola Jackson
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Janet L Peacock
- Department of Epidemiology Geisel, School of Medicine at Dartmouth, Dartmouth, NH, USA
- School of Population Health and Environmental Sciences, King's College London, London, UK
| | - A Margot Umpleby
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Geoffrey Charles-Edwards
- Medical Physics, Guy's and St Thomas, NHS Foundation Trust, London, UK
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Stephanie A Amiel
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Louise M Goff
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
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8
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Hakim O, Bello O, Ladwa M, Peacock JL, Umpleby AM, Charles-Edwards G, Amiel SA, Goff LM. The Link between Obesity and Inflammatory Markers in the Development of Type 2 Diabetes in Men of Black African and White European Ethnicity. Nutrients 2020; 12:nu12123796. [PMID: 33322261 PMCID: PMC7764810 DOI: 10.3390/nu12123796] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/08/2020] [Accepted: 12/09/2020] [Indexed: 12/16/2022] Open
Abstract
In this study, we aimed to assess ethnic differences in visceral (VAT), deep subcutaneous (dSAT), and superficial subcutaneous (sSAT) adipose tissue and their relationships with inflammatory markers between white European (WE) and black West African (BWA) men with normal glucose tolerance (NGT) and type 2 diabetes (T2D). Forty-two WE (23 NGT/19 T2D) and 43 BWA (23 NGT/20 T2D) men underwent assessment of plasma inflammatory markers using immunoassays alongside Dixon magnetic resonance imaging to quantify L4-5 VAT, dSAT and sSAT. Despite no ethnic differences in sSAT and dSAT, BWA men exhibited lower VAT (p = 0.002) and dSAT:sSAT (p = 0.047) than WE men. Adiponectin was inversely associated with sSAT in WE (p = 0.041) but positively associated in BWA (p = 0.031) men with T2D. Interleukin-6 (IL-6) was associated with VAT in WE but not in BWA men with NGT (WE: p = 0.009, BWA: p = 0.137) and T2D (WE: p = 0.070, BWA: p = 0.175). IL-6 was associated with dSAT in only WE men with NGT (WE: p = 0.030, BWA: p = 0.833). The only significant ethnicity interaction present was for the relationship between adiponectin and sSAT (Pinteraction = 0.003). The favourable adipose tissue distribution and the weaker relationships between adiposity and inflammation in BWA men suggest that adipose tissue inflammation may play a lesser role in T2D in BWA than WE men.
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Affiliation(s)
- Olah Hakim
- Diabetes Research Group, Departments of Diabetes & Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King’s College London, Waterloo Campus, Franklin-Wilkins Building, Room 3.87, London SE1 9NH, UK; (O.H.); (O.B.); (M.L.); (S.A.A.)
| | - Oluwatoyosi Bello
- Diabetes Research Group, Departments of Diabetes & Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King’s College London, Waterloo Campus, Franklin-Wilkins Building, Room 3.87, London SE1 9NH, UK; (O.H.); (O.B.); (M.L.); (S.A.A.)
| | - Meera Ladwa
- Diabetes Research Group, Departments of Diabetes & Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King’s College London, Waterloo Campus, Franklin-Wilkins Building, Room 3.87, London SE1 9NH, UK; (O.H.); (O.B.); (M.L.); (S.A.A.)
| | - Janet L. Peacock
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, NH 03755-1404, USA;
- School of Population Health and Environmental Sciences, King’s College London, London SE1 7EH, UK
| | - A. Margot Umpleby
- Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK;
| | - Geoffrey Charles-Edwards
- Medical Physics, Guy’s & St Thomas’ NHS Foundation Trust, London SE1 7EH, UK;
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London SE1 7EH, UK
| | - Stephanie A. Amiel
- Diabetes Research Group, Departments of Diabetes & Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King’s College London, Waterloo Campus, Franklin-Wilkins Building, Room 3.87, London SE1 9NH, UK; (O.H.); (O.B.); (M.L.); (S.A.A.)
| | - Louise M. Goff
- Diabetes Research Group, Departments of Diabetes & Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King’s College London, Waterloo Campus, Franklin-Wilkins Building, Room 3.87, London SE1 9NH, UK; (O.H.); (O.B.); (M.L.); (S.A.A.)
- Correspondence: ; Tel.: +44-(0)20-7848-6111
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Hu HH, Branca RT, Hernando D, Karampinos DC, Machann J, McKenzie CA, Wu HH, Yokoo T, Velan SS. Magnetic resonance imaging of obesity and metabolic disorders: Summary from the 2019 ISMRM Workshop. Magn Reson Med 2019; 83:1565-1576. [PMID: 31782551 DOI: 10.1002/mrm.28103] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/04/2019] [Accepted: 11/11/2019] [Indexed: 02/06/2023]
Abstract
More than 100 attendees from Australia, Austria, Belgium, Canada, China, Germany, Hong Kong, Indonesia, Japan, Malaysia, the Netherlands, the Philippines, Republic of Korea, Singapore, Sweden, Switzerland, the United Kingdom, and the United States convened in Singapore for the 2019 ISMRM-sponsored workshop on MRI of Obesity and Metabolic Disorders. The scientific program brought together a multidisciplinary group of researchers, trainees, and clinicians and included sessions in diabetes and insulin resistance; an update on recent advances in water-fat MRI acquisition and reconstruction methods; with applications in skeletal muscle, bone marrow, and adipose tissue quantification; a summary of recent findings in brown adipose tissue; new developments in imaging fat in the fetus, placenta, and neonates; the utility of liver elastography in obesity studies; and the emerging role of radiomics in population-based "big data" studies. The workshop featured keynote presentations on nutrition, epidemiology, genetics, and exercise physiology. Forty-four proffered scientific abstracts were also presented, covering the topics of brown adipose tissue, quantitative liver analysis from multiparametric data, disease prevalence and population health, technical and methodological developments in data acquisition and reconstruction, newfound applications of machine learning and neural networks, standardization of proton density fat fraction measurements, and X-nuclei applications. The purpose of this article is to summarize the scientific highlights from the workshop and identify future directions of work.
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Affiliation(s)
- Houchun H Hu
- Department of Radiology, Nationwide Children's Hospital, Columbus, Ohio
| | - Rosa Tamara Branca
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Diego Hernando
- Department of Radiology, University of Wisconsin-Madison, Madison, Wisconsin.,Department of Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin
| | - Dimitrios C Karampinos
- Department of Diagnostic and Interventional Radiology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Jürgen Machann
- Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research, Tübingen, Germany.,Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology, University Hospital Tübingen, Tübingen, Germany
| | - Charles A McKenzie
- Department of Medical Biophysics, University of Western Ontario, London, Ontario, Canada
| | - Holden H Wu
- Department of Radiological Sciences, University of California Los Angeles, Los Angeles, California
| | - Takeshi Yokoo
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - S Sendhil Velan
- Singapore Institute for Clinical Sciences, Agency for Science Technology and Research, Singapore.,Singapore BioImaging Consortium, Agency for Science Technology and Research, Singapore
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Hakim O, Bello O, Ladwa M, Christodoulou D, Bulut E, Shuaib H, Peacock JL, Umpleby AM, Charles-Edwards G, Amiel SA, Goff LM. Ethnic differences in hepatic, pancreatic, muscular and visceral fat deposition in healthy men of white European and black west African ethnicity. Diabetes Res Clin Pract 2019; 156:107866. [PMID: 31542318 DOI: 10.1016/j.diabres.2019.107866] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/09/2019] [Accepted: 09/18/2019] [Indexed: 12/16/2022]
Abstract
AIMS We aimed to assess ethnic differences in visceral adipose tissue (VAT), intrahepatic (IHL), intrapancreatic (IPL) and intramyocellular lipids (IMCL) between healthy white European (WE) and black west African (BWA) men. METHODS 23 WE and 20 BWA men underwent Dixon-magnetic resonance imaging to quantify VAT, IHL and IPL; and proton-magnetic resonance spectroscopy to quantify IMCL. Insulin sensitivity and beta-cell function were determined using homeostasis model assessment (HOMA-2). RESULTS BWA men exhibited significantly lower VAT (P = 0.021) and IHL (P = 0.044) than WE men, but comparable IPL (P = 0.92) and IMCL (P = 0.87). VAT was associated with IPL in both ethnicities (WE: P < 0.001; BWA: P = 0.001) but the relationship with IHL differed by ethnicity (Pinteraction = 0.018) and was only significant in WE men (WE: P < 0.001; BWA: P = 0.36). All ectopic fat depots inversely associated with insulin sensitivity and positively associated with beta-cell function in WE but not BWA men. CONCLUSIONS Lower VAT and IHL, and their lack of interrelation, in BWA men suggests ethnic differences exist in the mechanisms of ectopic fat deposition. The lack of association between ectopic fat with insulin sensitivity and beta-cell function in BWA men may indicate a lesser role for ectopic fat in the development of type 2 diabetes mellitus in black populations.
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Affiliation(s)
- Olah Hakim
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Oluwatoyosi Bello
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Meera Ladwa
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | | | - Esma Bulut
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Haris Shuaib
- Medical Physics, Guy's & St Thomas' NHS Foundation Trust, London, UK; Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - Janet L Peacock
- School of Population Health and Environmental Sciences, King's College London, London, UK
| | - A Margot Umpleby
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Geoff Charles-Edwards
- Medical Physics, Guy's & St Thomas' NHS Foundation Trust, London, UK; School of Biomedical Engineering & Imaging Sciences, King's College London, London, UK
| | - Stephanie A Amiel
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Louise M Goff
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK.
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11
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Hakim O, Bello O, Bonadonna RC, Mohandas C, Shojaee-Moradie F, Jackson N, Boselli L, Whitcher B, Shuaib H, Alberti KGMM, Peacock JL, Umpleby AM, Charles-Edwards G, Amiel SA, Goff LM. Ethnic differences in intrahepatic lipid and its association with hepatic insulin sensitivity and insulin clearance between men of black and white ethnicity with early type 2 diabetes. Diabetes Obes Metab 2019; 21:2163-2168. [PMID: 31074174 DOI: 10.1111/dom.13771] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 05/03/2019] [Accepted: 05/07/2019] [Indexed: 12/24/2022]
Abstract
Intrahepatic lipid (IHL) is linked with reduced hepatic insulin sensitivity and insulin clearance. Despite their high risk for type 2 diabetes (T2D), there have been limited investigations of these relationships in black populations. We investigated these relationships in 18 white European (WE) and 18 black West African (BWA) men with T2D <5 years. They underwent magnetic resonance imaging to quantify IHL, a hyperinsulinemic euglycaemic clamp with [6,6 2 H2 ] glucose infusion to assess hepatic insulin sensitivity and a hyperglycaemic clamp to assess insulin clearance. BWA men had lower IHL than WE men (3.7 [5.3] vs 6.6 [10.6]%, P = 0.03). IHL was inversely associated with basal hepatic insulin sensitivity in WE but not BWA men (BWA: r = -0.01, P = 0.96; WE: r = -0.72, P = 0.006) with a significant interaction by ethnicity (Pinteraction = 0.05); however, IHL was not associated with % suppression of endogenous glucose production by insulin in either ethnicity. IHL showed a trend to an association with insulin clearance in BWA only (BWA: r = -0.42, P = 0.09; WE: r = -0.14, P = 0.58). The lack of association between IHL and hepatic insulin sensitivity in BWA men indicates IHL may play a lesser detrimental role in T2D in BWA men.
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Affiliation(s)
- Olah Hakim
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Oluwatoyosi Bello
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Riccardo C Bonadonna
- Department of Medicine & Surgery, University of Parma and Azienda Ospedaliera, Universitaria di Parma, Parma, Italy
| | - Cynthia Mohandas
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | | | - Nicola Jackson
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Linda Boselli
- Division of Endocrinology and Metabolic Disease, University of Verona School of Medicine, Verona, Italy
| | - Brandon Whitcher
- Research Centre for Optimal Health, School of Life Sciences, University of Westminster, London, UK
| | - Haris Shuaib
- Department of Medical Physics, Guy's & St Thomas' NHS Foundation Trust, London, UK
- Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - Kurt George M M Alberti
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Janet L Peacock
- School of Population Health and Environmental Sciences, King's College London, London, UK
| | | | - Geoffrey Charles-Edwards
- Department of Medical Physics, Guy's & St Thomas' NHS Foundation Trust, London, UK
- School of Biomedical Engineering & Imaging Sciences, King's College London, London, UK
| | - Stephanie A Amiel
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Louise M Goff
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
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12
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Abstract
Type 2 diabetes is a major UK public health priority. Among minority ethnic communities, the prevalence is alarmingly high, approximately three to five times higher than in the white British population. Particularly striking is the earlier onset of Type 2 diabetes, which occurs some 10-12 years younger, with a significant proportion of cases being diagnosed before the age of 40 years. This review focuses on the UK context and Type 2 diabetes in adult populations, exploring the available evidence regarding the complex interplay of biological, lifestyle, social, clinical and healthcare system factors that are known to drive these disparities.
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Affiliation(s)
- L M Goff
- Diabetes Research Group, Departments of Diabetes and Nutritional Sciences, King's College London, London, UK
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13
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Ethnic distinctions in the pathophysiology of type 2 diabetes: a focus on black African-Caribbean populations. Proc Nutr Soc 2019; 79:184-193. [PMID: 31307560 DOI: 10.1017/s0029665119001034] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Type 2 diabetes (T2D) is a global public health priority, particularly for populations of black African-Caribbean ethnicity, who suffer disproportionately high rates of the disease. While the mechanisms underlying the development of T2D are well documented, there is growing evidence describing distinctions among black African-Caribbean populations. In the present paper, we review the evidence describing the impact of black African-Caribbean ethnicity on T2D pathophysiology. Ethnic differences were first recognised through evidence that metabolic syndrome diagnostic criteria fail to detect T2D risk in black populations due to less central obesity and dyslipidaemia. Subsequently more detailed investigations have recognised other mechanistic differences, particularly lower visceral and hepatic fat accumulation and a distinctly hyperinsulinaemic response to glucose stimulation. While epidemiological studies have reported exaggerated insulin resistance in black populations, more detailed and direct measures of insulin sensitivity have provided evidence that insulin sensitivity is not markedly different to other ethnic groups and does not explain the hyperinsulinaemia that is exhibited. These findings lead us to hypothesise that ectopic fat does not play a pivotal role in driving insulin resistance in black populations. Furthermore, we hypothesise that hyperinsulinaemia is driven by lower rates of hepatic insulin clearance rather than heightened insulin resistance and is a primary defect rather than occurring in compensation for insulin resistance. These hypotheses are being investigated in our ongoing South London Diabetes and Ethnicity Phenotyping study, which will enable a more detailed understanding of ethnic distinctions in the pathophysiology of T2D between men of black African and white European ethnicity.
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14
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Hakim O, Bonadonna RC, Mohandas C, Billoo Z, Sunderland A, Boselli L, Alberti KGMM, Peacock JL, Umpleby AM, Charles-Edwards G, Amiel SA, Goff LM. Associations Between Pancreatic Lipids and β-Cell Function in Black African and White European Men With Type 2 Diabetes. J Clin Endocrinol Metab 2019; 104:1201-1210. [PMID: 30407535 DOI: 10.1210/jc.2018-01809] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 11/01/2018] [Indexed: 02/06/2023]
Abstract
CONTEXT Intrapancreatic lipid (IPL) has been linked to β-cell dysfunction. Black populations disproportionately develop type 2 diabetes (T2D) and show distinctions in β-cell function compared with white populations. OBJECTIVE We quantified IPL in white European (WE) and black West African (BWA) men with early T2D and investigated the relationships between IPL and β-cell insulin secretory function (ISF). DESIGN, SETTING, AND PARTICIPANTS We performed a cross-sectional assessment of 18 WE and 19 BWA middle-age men with early T2D as part of the South London Diabetes and Ethnicity Phenotyping study. MAIN OUTCOME MEASURES The participants underwent Dixon MRI to determine IPL in the pancreatic head, body, and tail and subcutaneous and visceral adipose tissue volumes. Modeled first- and second-phase ISFs were comprehensively determined using C-peptide measurements during a 3-hour meal tolerance test and a 2-hour hyperglycemic clamp test. RESULTS The WE men had greater mean IPL levels compared with BWA men (P = 0.029), mainly owing to greater IPL levels in the pancreatic head (P = 0.009). The mean IPL level was inversely associated with orally stimulated first-phase ISF in WE but not BWA men (WE, r = -0.554, P = 0.026; BWA, r = -0.183, P = 0.468). No association was found with orally stimulated second-phase ISF in either WE or BWA men. No associations were found between the mean IPL level and intravenously stimulated ISF. CONCLUSIONS The IPL levels were lower in BWA than WE men with early T2D, and the lack of inverse association with first-phase ISF in BWA men indicates that IPL might be a less important determinant of the development of T2D in BWA than in WE men.
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Affiliation(s)
- Olah Hakim
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Riccardo C Bonadonna
- Department of Medicine and Surgery, University of Parma and Azienda Ospedaliera Universitaria di Parma, Parma, Italy
| | - Cynthia Mohandas
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Zoya Billoo
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Alexander Sunderland
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Linda Boselli
- Division of Endocrinology and Metabolic Disease, University of Verona School of Medicine, Verona, Italy
| | - K George M M Alberti
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Janet L Peacock
- School of Population Health and Environmental Sciences, King's College London, London, United Kingdom
| | - A Margot Umpleby
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Geoff Charles-Edwards
- Department of Medical Physics, Guy's and St. Thomas' NHS Foundation Trust, London, United Kingdom
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Stephanie A Amiel
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Louise M Goff
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
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15
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Differences in intrapancreatic lipid accumulation between men of White European and Black West African ethnicity with type 2 diabetes. Proc Nutr Soc 2019. [DOI: 10.1017/s0029665119000053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Poursafa P, Dadvand P, Amin MM, Hajizadeh Y, Ebrahimpour K, Mansourian M, Pourzamani H, Sunyer J, Kelishadi R. Association of polycyclic aromatic hydrocarbons with cardiometabolic risk factors and obesity in children. ENVIRONMENT INTERNATIONAL 2018; 118:203-210. [PMID: 29886236 DOI: 10.1016/j.envint.2018.05.048] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/28/2018] [Accepted: 05/29/2018] [Indexed: 05/23/2023]
Abstract
A limited body of evidence exists on the association of exposure to polycyclic aromatic hydrocarbons (PAHs) with cardiometabolic risk factors and obesity in children. No study has evaluated these associations in subgroups of children with and without excess weight, and those with and without cardiometabolic risk factors. We aimed to investigate the association between PAH exposure and cardiometabolic risk factors in children independent of their weight status. The secondary aim was to evaluate the obesogen properties of PAHs in children independent of their cardiometabolic risk factors. This study was based on a representative sample of 186 children (aged 6-18 years) living in Isfahan, Iran (2014-2016). We enrolled four groups of participants with and without excess weight and with and without cardiometabolic risk factor. Urinary levels of monohydroxy PAHs (OH-PAHs) were measured twice, six months apart. Logistic regression models were developed to estimate the associations of tertiles of urinary OH-PAH concentrations with cardiometabolic risk factors and excess weight, adjusted for the relevant covariates. The findings in all participants combined showed that increased risk of cardiometabolic risk factors and excess weight was associated with exposure to most of evaluated PAHs. Exposure to 1-hydroxypyrene was associated with higher risk of cardiometabolic risk factors in participants with excess weight. Exposure to 2-Naphtol was also associated with higher risk of cardiometabolic risk factors in both groups, but the associations were not significant (p < 0.1). For participants without cardiometabolic risk factors, exposure to 2-naphtol, 9-phenanthrol, and ∑ OH-PAH was associated with increased risk of obesity. For participants with cardiometabolic risk factors, we observed similar pattern of associations for 2-naphtol and ∑ OH-PAH, but the associations were not statistically significant (p < 0.1). We found that exposure to PAHs could possibly explain, in part, the cardiometabolic risk factors in children with excess weight as well as obesity in children with normal cardiometabolic profile.
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Affiliation(s)
- Parinaz Poursafa
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Payam Dadvand
- ISGlobal, Barcelona, Spain; Pompeu Fabra University, Barcelona, Spain; Ciber on Epidemiology and Public Health (CIBERESP), Madrid, Spain.
| | - Mohammad Mehdi Amin
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Yaghoub Hajizadeh
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Karim Ebrahimpour
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Marjan Mansourian
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hamidreza Pourzamani
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Jordi Sunyer
- ISGlobal, Barcelona, Spain; Pompeu Fabra University, Barcelona, Spain; Ciber on Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - Roya Kelishadi
- Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran.
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Hetherington-Rauth M, Bea JW, Blew RM, Funk JL, Hingle MD, Lee VR, Roe DJ, Wheeler MD, Lohman TG, Going SB. Relative contributions of lean and fat mass to bone strength in young Hispanic and non-Hispanic girls. Bone 2018; 113:144-150. [PMID: 29800691 PMCID: PMC6008243 DOI: 10.1016/j.bone.2018.05.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 04/16/2018] [Accepted: 05/20/2018] [Indexed: 12/28/2022]
Abstract
BACKGROUND With the high prevalence of childhood obesity, especially among Hispanic children, understanding how body weight and its components of lean and fat mass affect bone development is important, given that the amount of bone mineral accrued during childhood can determine osteoporosis risk later in life. The aim of this study was to assess the independent contributions of lean and fat mass on volumetric bone mineral density (vBMD), geometry, and strength in both weight-bearing and non-weight-bearing bones of Hispanic and non-Hispanic girls. METHODS Bone vBMD, geometry, and strength were assessed at the 20% distal femur, the 4% and 66% distal tibia, and the 66% distal radius of the non-dominant limb of 326, 9- to 12-year-old girls using peripheral quantitative computed tomography (pQCT). Total body lean and fat mass were measured by dual-energy x-ray absorptiometry (DXA). Multiple linear regression was used to assess the independent relationships of fat and lean mass with pQCT bone measures while adjusting for relevant confounders. Potential interactions between ethnicity and both fat and lean mass were also tested. RESULTS Lean mass was a significant positive contributor to all bone outcomes (p < 0.05) with the exception of vBMD at diaphyseal sites. Fat mass was a significant contributor to bone strength at weight bearing sites, but did not significantly contribute to bone strength at the non-weight bearing radius and was negatively associated with radius cortical content and thickness. Bone measures did not significantly differ between Hispanic and non-Hispanic girls, although there was a significant interaction between ethnicity and fat mass with total bone area at the femur (p = 0.02) and 66% tibia (p = 0.005) as well as bone strength at the femur (p = 0.03). CONCLUSION Lean mass is the main determinant of bone strength for appendicular skeletal sites. Fat mass contributes to bone strength in the weight-bearing skeleton but does not add to bone strength in non-weight-bearing locations and may potentially be detrimental. Bone vBMD, geometry, and strength did not differ between Hispanic and non-Hispanic girls; fat mass may be a stronger contributor to bone strength in weight-bearing bones of Hispanic girls compared to non-Hispanic.
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Affiliation(s)
| | - Jennifer W Bea
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ 85721, USA; Department of Medicine, University of Arizona, Tucson, AZ 85721, USA; Arizona Cancer Center, Tucson, AZ 85724, USA.
| | - Robert M Blew
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ 85721, USA.
| | - Janet L Funk
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ 85721, USA; Department of Medicine, University of Arizona, Tucson, AZ 85721, USA.
| | - Melanie D Hingle
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ 85721, USA.
| | - Vinson R Lee
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ 85721, USA.
| | - Denise J Roe
- Arizona Cancer Center, Tucson, AZ 85724, USA; Department of Epidemiology and Biostatistics, University of Arizona, Tucson, AZ 85721, USA.
| | - Mark D Wheeler
- Department of Pediatric Endocrinology, University of Arizona, Tucson, AZ 85724, USA.
| | - Timothy G Lohman
- Department of Physiology, University of Arizona, Tucson, AZ 85721, USA
| | - Scott B Going
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ 85721, USA.
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18
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Hens W, Vissers D, Hansen D, Peeters S, Gielen J, Van Gaal L, Taeymans J. The effect of diet or exercise on ectopic adiposity in children and adolescents with obesity: a systematic review and meta-analysis. Obes Rev 2017; 18:1310-1322. [PMID: 28913977 DOI: 10.1111/obr.12577] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/26/2017] [Accepted: 05/14/2017] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Ectopic fat depostion in youth with obesity is associated with an increased cardiovascular disease risk. The aim of this meta-analysis was to summarize the evidence for the use of diet and/or exercise on ectopic adiposity in this population. METHODS A systematic literature search was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-analysis statement. Clinical trials that assessed ectopic fat deposition and included study arms with diet and/or exercise were searched in PubMed, PEDro and the Cochrane database. RESULTS Hepatic fat content and intramyocellular lipid content were described in nine studies and three studies, respectively. Most studies included teenagers, and study duration ranged between 3 and 12 months without follow-up. Using random-effects weights, the standardized mean difference of the change in hepatic adiposity (totalling 320 subjects) was -0.54 Hedges' g (95% confidence interval: -0.69 to -0.38 with p < 0.0001). By re-expressing this effect size, it is seen that diet and/or exercise results in an absolute reduction of intrahepatic lipid with 2%, which accords with a relative reduction up to 70%. Although there were significant ameliorations of insulin sensitivity, no significant changes in intramyocellular lipid were observed. CONCLUSIONS This meta-analysis showed that diet and/or exercise is effective to reduce hepatic adiposity in youth with obesity.
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Affiliation(s)
- W Hens
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - D Vissers
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - D Hansen
- Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium.,REVAL-Rehabilitation Research Centre, Diepenbeek, Belgium.,Heart Centre Hasselt, Jessa Hospital, Hasselt, Belgium
| | - S Peeters
- Flemish Working Group from AXXON, Antwerp, Belgium
| | - J Gielen
- Department of Radiology, Antwerp University Hospital, Antwerp, Belgium
| | - L Van Gaal
- Department of Endocrinology, Diabetology and Metabolism, Antwerp University Hospital, Antwerp, Belgium
| | - J Taeymans
- Health, Bern University of Applied Sciences-Health, Bern, Switzerland.,Faculty of Sport and Rehabilitation Sciences, Vrije Universiteit Brussel, Brussels, Belgium
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19
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Arenaza L, Medrano M, Amasene M, Rodríguez-Vigil B, Díez I, Graña M, Tobalina I, Maiz E, Arteche E, Larrarte E, Huybrechts I, Davis CL, Ruiz JR, Ortega FB, Margareto J, Labayen I. Prevention of diabetes in overweight/obese children through a family based intervention program including supervised exercise (PREDIKID project): study protocol for a randomized controlled trial. Trials 2017; 18:372. [PMID: 28793919 PMCID: PMC5551009 DOI: 10.1186/s13063-017-2117-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 07/26/2017] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The global pandemic of obesity has led to an increased risk for prediabetes and type-2 diabetes (T2D). The aims of the current project are: (1) to evaluate the effect of a 22-week family based intervention program, including supervised exercise, on insulin resistance syndrome (IRS) risk in children with a high risk of developing T2D and (2) to identify the profile of microRNA in circulating exosomes and in peripheral blood mononuclear cells in children with a high risk of developing T2D and its response to a multidisciplinary intervention program including exercise. METHODS A total of 84 children, aged 8-12 years, with a high risk of T2D will be included and randomly assigned to control (N = 42) or intervention (N = 42) groups. The control group will receive a family based lifestyle education and psycho-educational program (2 days/month), while the intervention group will attend the same lifestyle education and psycho-educational program plus the exercise program (3 days/week, 90 min per session including warm-up, moderate to vigorous aerobic activities, and strength exercises). The following measurements will be evaluated at baseline prior to randomization and after the intervention: fasting insulin, glucose and hemoglobin A1c; body composition (dual-energy X-ray absorptiometry); ectopic fat (magnetic resonance imaging); microRNA expression in circulating exosomes and in peripheral blood mononuclear cells (MiSeq; Illumina); cardiorespiratory fitness (cardiopulmonary exercise testing); dietary habits and physical activity (accelerometry). DISCUSSION Prevention and identification of children with a high risk of developing T2D could help to improve their cardiovascular health and to reduce the comorbidities associated with obesity. TRIAL REGISTRATION ClinicalTrials.gov, ID: NCT03027726 . Registered on 16 January 2017.
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Affiliation(s)
- Lide Arenaza
- Nutrition, Exercise and Health Research group, Elikadura, Ariketa Fisikoa eta Osasuna, ELIKOS group, Department of Nutrition and Food Science, University of the Basque Country, UPV/EHU, Vitoria-Gasteiz, Spain
| | - María Medrano
- Nutrition, Exercise and Health Research group, Elikadura, Ariketa Fisikoa eta Osasuna, ELIKOS group, Department of Nutrition and Food Science, University of the Basque Country, UPV/EHU, Vitoria-Gasteiz, Spain
| | - María Amasene
- Nutrition, Exercise and Health Research group, Elikadura, Ariketa Fisikoa eta Osasuna, ELIKOS group, Department of Nutrition and Food Science, University of the Basque Country, UPV/EHU, Vitoria-Gasteiz, Spain
| | - Beatriz Rodríguez-Vigil
- Department of Magnetic Resonance Imaging, Osatek, University Hospital of Alava (HUA), Vitoria-Gasteiz, Spain
| | - Ignacio Díez
- Paediatric Endocrinology Unit, University Hospital of Araba (HUA), Vitoria-Gasteiz, Spain
| | - Manuel Graña
- Computational Intelligence Group, University of the Basque Country, UPV/EHU, Donostia, Spain
| | - Ignacio Tobalina
- Department of Nuclear Medicine, University Hospital of Araba (HUA), Vitoria-Gasteiz, Spain
| | - Edurne Maiz
- Department of Personality, Assessment and Psychological Treatment, University of the Basque Country, UPV/EHU, San Sebastián-Donostia, Spain
| | - Edurne Arteche
- Department of Radiology, University Hospital of Araba (HUA), Vitoria-Gasteiz, Spain
| | - Eider Larrarte
- Technological Services Division, Health and quality of life, TECNALIA, Miñano, Spain
| | - Inge Huybrechts
- Nutrition and Metabolism Section, International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Catherine L. Davis
- Georgia Prevention Institute, Medical College of Georgia, Augusta University, Augusta, GA USA
| | - Jonatan R. Ruiz
- PROmoting FITness and Health through physical activity research group (PROFITH), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Grenada, Spain
| | - Francisco B. Ortega
- PROmoting FITness and Health through physical activity research group (PROFITH), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Grenada, Spain
| | - Javier Margareto
- Technological Services Division, Health and quality of life, TECNALIA, Miñano, Spain
| | - Idoia Labayen
- Department of Health Sciences, Public University of Navarra, Pamplona, Spain
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20
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Metabolic Disorders in HIV-Infected Adolescents Receiving Protease Inhibitors. BIOMED RESEARCH INTERNATIONAL 2017; 2017:7481597. [PMID: 28293638 PMCID: PMC5331476 DOI: 10.1155/2017/7481597] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 12/29/2016] [Indexed: 12/26/2022]
Abstract
Protease inhibitor (PI) may cause abnormal glucose metabolism, abnormal lipid metabolism, and metabolic syndrome in HIV-infected adults but less well studied in Asian adolescents. This cross-sectional study evaluated anthropometric factors, oral glucose tolerance test, and lipid profiles of perinatally HIV-infected Thai adolescents who had received PI-based antiretroviral therapy for at least 6 months. Eighty adolescents were enrolled [median (IQR) age 16.7 (14.6–18.0) years, 42 males]. Metabolic syndrome, prediabetes, and type 2 diabetes mellitus (T2DM) were found in 8 (10%), 17 (22.1%), and 3 (3.8%) adolescents, respectively. Dyslipidemia was found in 56 (70%) adolescents, with hypertriglyceridemia being the most common type. In multivariate analysis, presence of lipohypertrophy (OR: 25.7, 95% CI: 3.2–202.8; p = 0.002) and longer duration of PI use (OR: 1.04, 95% CI: 1.00–1.08; p = 0.023) were associated with metabolic syndrome. Obesity (OR: 7.71, 95% CI: 1.36–43.7; p = 0.021), presence of lipohypertrophy (OR: 62.9, 95% CI: 4.97–795.6; p = 0.001), and exposure to stavudine for ≥6 months (OR: 8.18, 95% CI: 1.37–48.7; p = 0.021) were associated with prediabetes/T2DM, while exposure to tenofovir for ≥6 months reduced the risk (OR: 0.17, 95% CI: 0.04–0.78; p = 0.022). Metabolic disorders were commonly found in adolescents receiving PI. Careful monitoring and early intervention to modify cardiovascular risk should be systematically implemented in this population particularly those with exposure to stavudine.
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21
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Brar PC. Vascular phenotype of obese adolescents with prediabetes and/or Type 2 diabetes (T2DM): Review of the current literature. Diabetes Metab Syndr 2016; 10:250-256. [PMID: 27381966 DOI: 10.1016/j.dsx.2016.06.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 06/06/2016] [Indexed: 10/21/2022]
Affiliation(s)
- Preneet Cheema Brar
- Department of Pediatrics, Division of Pediatric Endocrinology, New York University School of Medicine, New York, NY, United States.
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22
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Todendi PF, Klinger EI, Ferreira MB, Reuter CP, Burgos MS, Possuelo LG, Valim ARM. Association of IL-6 and CRP gene polymorphisms with obesity and metabolic disorders in children and adolescents. AN ACAD BRAS CIENC 2015; 87:915-24. [PMID: 25993353 DOI: 10.1590/0001-3765201520140364] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 11/25/2014] [Indexed: 11/21/2022] Open
Abstract
Activation of adipose tissue inflammation is associated with obesity caused by lipid accumulation in adipocytes. Through this activation, proinflammatory cytokines, such as Interleukin-6 (IL-6) and C-reactive protein (CRP) seem to influence metabolic disorders. The present study evaluated whether polymorphisms in the CRP (rs1205) and IL-6 (rs1800795, rs2069845) genes are associated with the development of metabolic disorders in children and adolescents. A cross-sectional study was performed, consisting of 470 students from the municipality of Santa Cruz do Sul, Brazil, aged 7-17 years. Body mass index (BMI) was classified according to overweight and obesity. Genotyping was performed by real-time Polymerase Chain Reaction (PCR). Anthropometric characteristics, biochemical markers, immunological markers and blood pressure were assessed. Descriptive statistics, chi-square and logistic regression were used for the analyses. No association was detected between the rs1800795 polymorphism and the assessed variables. Individuals with the risk genotype in the rs1205 gene were associated with the risk of developing hypercholesterolemia (OR 2.79; CI 1.40, 5.57; p = 0.003). Carriers of the risk genotype in the rs2069845 gene are associated with the risk of developing obesity (OR 3.07; CI 1.08, 8.72; p = 0.03). The polymorphism rs2069845 was associated with obesity and rs1205 was associated with the risk of developing hypercholesterolemia in Brazilian schoolchildren.
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Affiliation(s)
- Pâmela F Todendi
- Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brasil
| | - Elisa I Klinger
- Departamento de Biologia e Farmácia, Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brasil
| | - Michele B Ferreira
- Departamento de Biologia e Farmácia, Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brasil
| | - Cézane P Reuter
- Departamento de Educação Física e Saúde, Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brasil
| | - Miria S Burgos
- Departamento de Educação Física e Saúde, Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brasil
| | - Lia G Possuelo
- Departamento de Biologia e Farmácia, Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brasil
| | - Andréia R M Valim
- Departamento de Biologia e Farmácia, Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brasil
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23
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Das SK, Sharma NK, Zhang B. Integrative network analysis reveals different pathophysiological mechanisms of insulin resistance among Caucasians and African Americans. BMC Med Genomics 2015; 8:4. [PMID: 25868721 PMCID: PMC4351975 DOI: 10.1186/s12920-015-0078-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 01/27/2015] [Indexed: 12/15/2022] Open
Abstract
Background African Americans (AA) have more pronounced insulin resistance and higher insulin secretion than European Americans (Caucasians or CA) when matched for age, gender, and body mass index (BMI). We hypothesize that physiological differences (including insulin sensitivity [SI]) between CAs and AAs can be explained by co-regulated gene networks in tissues involved in glucose homeostasis. Methods We performed integrative gene network analyses of transcriptomic data in subcutaneous adipose tissue of 99 CA and 37 AA subjects metabolically characterized as non-diabetic, with a range of SI and BMI values. Results Transcripts negatively correlated with SI in only the CA or AA subjects were enriched for inflammatory response genes and integrin-signaling genes, respectively. A sub-network (module) with TYROBP as a hub enriched for genes involved in inflammatory response (corrected p = 1.7E-26) was negatively correlated with SI (r = −0.426, p = 4.95E-04) in CA subjects. SI was positively correlated with transcript modules enriched for mitochondrial metabolism in both groups. Several SI-associated co-expressed modules were enriched for genes differentially expressed between groups. Two modules involved in immune response to viral infections and function of adherens junction, are significantly correlated with SI only in CAs. Five modules involved in drug/intracellular transport and oxidoreductase activity, among other activities, are correlated with SI only in AAs. Furthermore, we identified driver genes of these race-specific SI-associated modules. Conclusions SI-associated transcriptional networks that were deranged predominantly in one ethnic group may explain the distinctive physiological features of glucose homeostasis among AA subjects. Electronic supplementary material The online version of this article (doi:10.1186/s12920-015-0078-0) contains supplementary material, which is available to authorized users.
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24
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Affiliation(s)
| | - Terri H Lipman
- University of Pennsylvania School of Nursing, Philadelphia, PA
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