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Igudesman D, Mucinski J, Harrison S, Cawthon PM, Linge J, Goodpaster BH, Cummings SR, Hepple RT, Jurczak MJ, Kritchevsky SB, Marcinek D, Coen PM, Corbin KD. Associations of Skeletal Muscle Mass, Muscle Fat Infiltration, Mitochondrial Energetics, and Cardiorespiratory Fitness With Liver Fat Among Older Adults. J Gerontol A Biol Sci Med Sci 2024; 79:glae047. [PMID: 38366047 PMCID: PMC10949442 DOI: 10.1093/gerona/glae047] [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: 10/20/2023] [Indexed: 02/18/2024] Open
Abstract
BACKGROUND Muscle mass loss may be associated with liver fat accumulation, yet scientific consensus is lacking and evidence in older adults is scant. It is unclear which muscle characteristics might contribute to this association in older adults. METHODS We associated comprehensive muscle-related phenotypes including muscle mass normalized to body weight (D3-creatine dilution), muscle fat infiltration (magnetic resonance imaging), carbohydrate-supported muscle mitochondrial maximal oxidative phosphorylation (respirometry), and cardiorespiratory fitness (VO2 peak) with liver fat among older adults. Linear regression models adjusted for age, gender, technician (respirometry only), daily minutes of moderate-to-vigorous physical activity, and prediabetes/diabetes status tested main effects and interactions of each independent variable with waist circumference (high: women-≥88 cm, men-≥102 cm) and gender. RESULTS Among older adults aged 75 (interquartile range: 73, 79 years; 59.8% women), muscle mass and liver fat were not associated overall (N = 362) but were positively associated among participants with a high waist circumference (β: 25.2; 95% confidence intervals [95% CI]: 11.7, 40.4; p = .0002; N = 160). Muscle fat infiltration and liver fat were positively associated (β: 15.2; 95% CI: 6.8, 24.3; p = .0003; N = 378). Carbohydrate-supported maximum oxidative phosphorylation (before adjustment) and VO2 peak (after adjustment; β: -12.9; 95% CI: -20.3, -4.8; p = .003; N = 361) were inversely associated with liver fat; adjustment attenuated the estimate for maximum oxidative phosphorylation although the point estimate remained negative (β: -4.0; 95% CI: -11.6, 4.2; p = .32; N = 321). CONCLUSIONS Skeletal muscle-related characteristics are metabolically relevant factors linked to liver fat in older adults. Future research should confirm our results to determine whether trials targeting mechanisms common to liver and muscle fat accumulation are warranted.
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Affiliation(s)
- Daria Igudesman
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - Justine Mucinski
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - Stephanie Harrison
- San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco, California, USA
| | - Peggy M Cawthon
- San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco, California, USA
| | | | - Bret H Goodpaster
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - Steven R Cummings
- San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco, California, USA
| | - Russell T Hepple
- Department of Physical Therapy, University of Florida, Gainesville, Florida, USA
| | - Michael J Jurczak
- Division of Endocrinology and Metabolism, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Stephen B Kritchevsky
- Division of Gerontology and Geriatric Medicine, Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - David Marcinek
- Department of Radiology, University of Washington, Seattle, Washington, USA
| | - Paul M Coen
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, Florida, USA
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Igudesman D, Mucinski J, Harrison S, Cawthon PM, Linge J, Goodpaster BH, Cummings SR, Hepple RT, Jurczak MJ, Kritchevsky SB, Marcinek D, Coen PM, Corbin KD. Associations of Skeletal Muscle Mass, Muscle Fat Infiltration, Mitochondrial Energetics, and Cardiorespiratory Fitness with Liver Fat Among Older Adults. medRxiv 2023:2023.10.24.23297480. [PMID: 37961367 PMCID: PMC10635187 DOI: 10.1101/2023.10.24.23297480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Background Muscle mass loss may be associated with liver fat accumulation, yet scientific consensus is lacking and evidence in older adults is scant. It is unclear which muscle characteristics might contribute to this association in older adults. Methods We associated comprehensive muscle-related phenotypes including muscle mass normalized to body weight (D 3 -creatine dilution), muscle fat infiltration (MRI), carbohydrate-supported muscle mitochondrial maximal oxidative phosphorylation (respirometry), and cardiorespiratory fitness (VO 2 peak) with liver fat among older adults. Linear regression models adjusted for age, gender, technician (respirometry only), daily minutes of moderate to vigorous physical activity, and prediabetes/diabetes status tested main effects and interactions of each independent variable with waist circumference (high: women-≥88 cm, men-≥102 cm) and gender. Results Among older adults aged 75 (IQR 73, 79 years; 59.8% women), muscle mass and liver fat were not associated overall but were positively associated among participants with a high waist circumference (β: 25.2; 95%CI 11.7, 40.4; p =.0002; N=362). Muscle fat infiltration and liver fat were positively associated (β: 15.2; 95%CI 6.8, 24.3; p =.0003; N=378). Carbohydrate-supported maximum oxidative phosphorylation and VO 2 peak (adjusted β: -12.9; 95%CI -20.3, -4.8; p =0.003; N=361) were inversely associated with liver fat; adjustment attenuated the estimate for maximum oxidative phosphorylation although the point estimate remained negative (β: -4.0; 95%CI -11.6, 4.2; p =0.32; N=321). Conclusions Skeletal muscle-related characteristics are metabolically relevant factors linked to liver fat in older adults. Future research should confirm our results to determine whether trials targeting mechanisms common to liver and muscle fat accumulation are warranted.
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Casu A, Nunez Lopez YO, Yu G, Clifford C, Bilal A, Petrilli AM, Cornnell H, Carnero EA, Bhatheja A, Corbin KD, Iliuk A, Maahs DM, Pratley RE. The proteome and phosphoproteome of circulating extracellular vesicle-enriched preparations are associated with characteristic clinical features in type 1 diabetes. Front Endocrinol (Lausanne) 2023; 14:1219293. [PMID: 37576973 PMCID: PMC10417723 DOI: 10.3389/fendo.2023.1219293] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/06/2023] [Indexed: 08/15/2023] Open
Abstract
Introduction There are no validated clinical or laboratory biomarkers to identify and differentiate endotypes of type 1 diabetes (T1D) or the risk of progression to chronic complications. Extracellular vesicles (EVs) have been studied as biomarkers in several different disease states but have not been well studied in T1D. Methods As the initial step towards circulating biomarker identification in T1D, this pilot study aimed to provide an initial characterization of the proteomic and phosphoproteomic landscape of circulating EV-enriched preparations in participants with established T1D (N=10) and healthy normal volunteers (Controls) (N=7) (NCT03379792) carefully matched by age, race/ethnicity, sex, and BMI. EV-enriched preparations were obtained using EVtrap® technology. Proteins were identified and quantified by LC-MS analysis. Differential abundance and coexpression network (WGCNA), and pathway enrichment analyses were implemented. Results The detected proteins and phosphoproteins were enriched (75%) in exosomal proteins cataloged in the ExoCarta database. A total of 181 proteins and 8 phosphoproteins were differentially abundant in participants with T1D compared to controls, including some well-known EVproteins (i.e., CD63, RAB14, BSG, LAMP2, and EZR). Enrichment analyses of differentially abundant proteins and phosphoproteins of EV-enriched preparations identified associations with neutrophil, platelet, and immune response functions, as well as prion protein aggregation. Downregulated proteins were involved in MHC class II signaling and the regulation of monocyte differentiation. Potential key roles in T1D for C1q, plasminogen, IL6ST, CD40, HLA-DQB1, HLA-DRB1, CD74, NUCB1, and SAP, are highlighted. Remarkably, WGCNA uncovered two protein modules significantly associated with pancreas size, which may be implicated in the pathogenesis of T1D. Similarly, these modules showed significant enrichment for membrane compartments, processes associated with inflammation and the immune response, and regulation of viral processes, among others. Discussion This study demonstrates the potential of proteomic and phosphoproteomic signatures of EV-enriched preparations to provide insight into the pathobiology of T1D. The WGCNA analysis could be a powerful tool to discriminate signatures associated with different pathobiological components of the disease.
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Affiliation(s)
- Anna Casu
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
| | - Yury O. Nunez Lopez
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
| | - Gongxin Yu
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
| | - Christopher Clifford
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
| | - Anika Bilal
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
| | | | - Heather Cornnell
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
| | | | - Ananya Bhatheja
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
| | - Karen D. Corbin
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
| | - Anton Iliuk
- Biomarker Discovery Department, Tymora Analytical Operations, West Lafayette, IN, United States
| | - David M. Maahs
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, United States
| | - Richard E. Pratley
- AdventHealth, Translational Research Institute (TRI), Orlando, FL, United States
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Corbin KD, Pittas AG, Desouza C, Grdinovac KK, Herzig KH, Kashyap SR, Kim SH, Nelson J, Rasouli N, Vickery EM, Knowler WC, Pratley RE. Indices of hepatic steatosis and fibrosis in prediabetes and association with diabetes development in the vitamin D and type 2 diabetes study. J Diabetes Complications 2023; 37:108475. [PMID: 37104979 PMCID: PMC10683797 DOI: 10.1016/j.jdiacomp.2023.108475] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 04/07/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023]
Abstract
AIMS Non-alcoholic fatty liver disease (NAFLD) is a common comorbidity that leads to poor outcomes in people at high risk for development of type 2 diabetes (T2D). Vitamin D is a possible mediator. In the vitamin D and type 2 diabetes study (D2d), we investigated the relationship of baseline indices of NAFLD with incident T2D and whether the effect of vitamin D on diabetes was modified by NAFLD. METHODS Cross-sectional associations of indices of NAFLD with glycemia and vitamin D status were assessed in 3972 individuals screened for the D2d study. In those with prediabetes randomized to vitamin D or placebo (n = 2423), we examined longitudinal associations of NAFLD indices with incident T2D. We used validated non-invasive scores to assess steatosis [(hepatic steatosis index (HSI); NAFLD-liver fat score (NAFLD-LFS)] and advanced fibrosis [fibrosis-4 (FIB-4) index; AST to Platelet Ratio Index (APRI)]. RESULTS Eighty-five percent of screened participants had likely steatosis by HSI and 71 % by NAFLD-LFS; 3 % were likely to have advanced fibrosis by FIB-4 and 1.2 % by APRI. FIB-4 indicated that 20.4 % of individuals require further follow up to assess liver health. Steatosis and fibrosis scores were higher among participants with worse glycemia. The NAFLD-LFS and APRI predicted development of diabetes (hazard ratios [95%CI] 1.35 [1.07, 1.70]; P = 0.012) and 2.36 (1.23, 4.54; P = 0.010), respectively). The effect of vitamin D on diabetes risk was not modified by baseline NAFLD indices. Individuals with likely steatosis had a smaller increase in serum 25-hydroxyvitamin D level in response to vitamin D than those without steatosis. CONCLUSIONS The predicted high prevalence of steatosis, the need for further fibrosis workup, and the relationship between liver health and incident T2D suggest that routine screening with clinically accessible scores may be an important strategy to reduce disease burden.
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Affiliation(s)
- Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, FL, United States of America.
| | | | - Cyrus Desouza
- The University of Nebraska Medical Center and Omaha Veterans Affairs Medical Center, Omaha, NE, United States of America
| | | | - Karl-Heinz Herzig
- Research Unit of Biomedicine and Internal Medicine, Faculty of Medicine, and Medical Research Center, University of Oulu and Oulu University Hospital, 90220 Oulu, Finland; Department of Pediatric Gastroenterology and Metabolic Diseases, Pediatric Institute, Poznan University of Medical Sciences, 60-572 Poznań, Poland
| | | | - Sun H Kim
- Stanford University Medical Center, Stanford, CA, United States of America
| | - Jason Nelson
- Tufts Medical Center, Boston, MA, United States of America
| | - Neda Rasouli
- The University of Colorado School of Medicine, Aurora, CO, United States of America; The Veterans Affairs Eastern Colorado Health Care System, Aurora, CO, United States of America
| | | | - William C Knowler
- National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, AZ, United States of America
| | - Richard E Pratley
- AdventHealth Translational Research Institute, Orlando, FL, United States of America.
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Corbin KD, Carnero EA, Dirks B, Igudesman D, Yi F, Marcus A, Davis TL, Pratley RE, Rittmann BE, Krajmalnik-Brown R, Smith SR. Host-diet-gut microbiome interactions influence human energy balance: a randomized clinical trial. Nat Commun 2023; 14:3161. [PMID: 37258525 PMCID: PMC10232526 DOI: 10.1038/s41467-023-38778-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [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: 01/18/2023] [Accepted: 05/12/2023] [Indexed: 06/02/2023] Open
Abstract
The gut microbiome is emerging as a key modulator of human energy balance. Prior studies in humans lacked the environmental and dietary controls and precision required to quantitatively evaluate the contributions of the gut microbiome. Using a Microbiome Enhancer Diet (MBD) designed to deliver more dietary substrates to the colon and therefore modulate the gut microbiome, we quantified microbial and host contributions to human energy balance in a controlled feeding study with a randomized crossover design in young, healthy, weight stable males and females (NCT02939703). In a metabolic ward where the environment was strictly controlled, we measured energy intake, energy expenditure, and energy output (fecal and urinary). The primary endpoint was the within-participant difference in host metabolizable energy between experimental conditions [Control, Western Diet (WD) vs. MBD]. The secondary endpoints were enteroendocrine hormones, hunger/satiety, and food intake. Here we show that, compared to the WD, the MBD leads to an additional 116 ± 56 kcals (P < 0.0001) lost in feces daily and thus, lower metabolizable energy for the host (89.5 ± 0.73%; range 84.2-96.1% on the MBD vs. 95.4 ± 0.21%; range 94.1-97.0% on the WD; P < 0.0001) without changes in energy expenditure, hunger/satiety or food intake (P > 0.05). Microbial 16S rRNA gene copy number (a surrogate of biomass) increases (P < 0.0001), beta-diversity changes (whole genome shotgun sequencing; P = 0.02), and fermentation products increase (P < 0.01) on an MBD as compared to a WD along with significant changes in the host enteroendocrine system (P < 0.0001). The substantial interindividual variability in metabolizable energy on the MBD is explained in part by fecal SCFAs and biomass. Our results reveal the complex host-diet-microbiome interplay that modulates energy balance.
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Affiliation(s)
- Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, FL, USA
| | - Elvis A Carnero
- AdventHealth Translational Research Institute, Orlando, FL, USA
| | - Blake Dirks
- Biodesign Center for Health through Microbiomes, Arizona State University, Tempe, AZ, USA
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Daria Igudesman
- AdventHealth Translational Research Institute, Orlando, FL, USA
| | - Fanchao Yi
- AdventHealth Translational Research Institute, Orlando, FL, USA
| | - Andrew Marcus
- Biodesign Center for Health through Microbiomes, Arizona State University, Tempe, AZ, USA
- Skyology Inc, San Francisco, CA, USA
| | - Taylor L Davis
- Biodesign Center for Health through Microbiomes, Arizona State University, Tempe, AZ, USA
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | | | - Bruce E Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA
| | - Rosa Krajmalnik-Brown
- Biodesign Center for Health through Microbiomes, Arizona State University, Tempe, AZ, USA.
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA.
| | - Steven R Smith
- AdventHealth Translational Research Institute, Orlando, FL, USA.
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Bishop FK, Addala A, Corbin KD, Muntis FR, Pratley RE, Riddell MC, Mayer-Davis EJ, Maahs DM, Zaharieva DP. An Overview of Diet and Physical Activity for Healthy Weight in Adolescents and Young Adults with Type 1 Diabetes: Lessons Learned from the ACT1ON Consortium. Nutrients 2023; 15:nu15112500. [PMID: 37299463 DOI: 10.3390/nu15112500] [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: 04/19/2023] [Revised: 05/18/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
The prevalence of overweight and obesity in young people with type 1 diabetes (T1D) now parallels that of the general population. Excess adiposity increases the risk of cardiovascular disease, which is already elevated up to 10-fold in T1D, underscoring a compelling need to address weight management as part of routine T1D care. Sustainable weight management requires both diet and physical activity (PA). Diet and PA approaches must be optimized towards the underlying metabolic and behavioral challenges unique to T1D to support glycemic control throughout the day. Diet strategies for people with T1D need to take into consideration glycemic management, metabolic status, clinical goals, personal preferences, and sociocultural considerations. A major barrier to weight management in this high-risk population is the challenge of integrating regular PA with day-to-day management of T1D. Specifically, exercise poses a substantial challenge due to the increased risk of hypoglycemia and/or hyperglycemia. Indeed, about two-thirds of individuals with T1D do not engage in the recommended amount of PA. Hypoglycemia presents a serious health risk, yet prevention and treatment often necessitates the consumption of additional calories, which may prohibit weight loss over time. Exercising safely is a concern and challenge with weight management and maintaining cardiometabolic health for individuals living with T1D and many healthcare professionals. Thus, a tremendous opportunity exists to improve exercise participation and cardiometabolic outcomes in this population. This article will review dietary strategies, the role of combined PA and diet for weight management, current resources for PA and glucose management, barriers to PA adherence in adults with T1D, as well as findings and lessons learned from the Advancing Care for Type 1 Diabetes and Obesity Network (ACT1ON).
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Affiliation(s)
- Franziska K Bishop
- Division of Endocrinology, Department of Pediatrics, School of Medicine, Stanford University, Stanford, CA 94304, USA
| | - Ananta Addala
- Division of Endocrinology, Department of Pediatrics, School of Medicine, Stanford University, Stanford, CA 94304, USA
| | - Karen D Corbin
- AdventHealth, Translational Research Institute, Orlando, FL 32804, USA
| | - Franklin R Muntis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Richard E Pratley
- AdventHealth, Translational Research Institute, Orlando, FL 32804, USA
| | - Michael C Riddell
- School of Kinesiology and Health Science, Muscle Health Research Centre, York University, Toronto, ON M3J 1P3, Canada
| | - Elizabeth J Mayer-Davis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - David M Maahs
- Division of Endocrinology, Department of Pediatrics, School of Medicine, Stanford University, Stanford, CA 94304, USA
- Stanford Diabetes Research Center, Stanford, CA 94305, USA
| | - Dessi P Zaharieva
- Division of Endocrinology, Department of Pediatrics, School of Medicine, Stanford University, Stanford, CA 94304, USA
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Igudesman D, Crandell J, Corbin KD, Zaharieva DP, Addala A, Thomas JM, Casu A, Kirkman MS, Pokaprakarn T, Riddell MC, Burger K, Pratley RE, Kosorok MR, Maahs DM, Mayer-Davis EJ. Weight management in young adults with type 1 diabetes: The advancing care for type 1 diabetes and obesity network sequential multiple assignment randomized trial pilot results. Diabetes Obes Metab 2023; 25:688-699. [PMID: 36314293 PMCID: PMC9898100 DOI: 10.1111/dom.14911] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 10/22/2022] [Accepted: 10/28/2022] [Indexed: 02/06/2023]
Abstract
AIMS Co-management of weight and glycaemia is critical yet challenging in type 1 diabetes (T1D). We evaluated the effect of a hypocaloric low carbohydrate, hypocaloric moderate low fat, and Mediterranean diet without calorie restriction on weight and glycaemia in young adults with T1D and overweight or obesity. MATERIALS AND METHODS We implemented a 9-month Sequential, Multiple Assignment, Randomized Trial pilot among adults aged 19-30 years with T1D for ≥1 year and body mass index 27-39.9 kg/m2 . Re-randomization occurred at 3 and 6 months if the assigned diet was not acceptable or not effective. We report results from the initial 3-month diet period and re-randomization statistics before shutdowns due to COVID-19 for primary [weight, haemoglobin A1c (HbA1c), percentage of time below range <70 mg/dl] and secondary outcomes [body fat percentage, percentage of time in range (70-180 mg/dl), and percentage of time below range <54 mg/dl]. Models adjusted for design, demographic and clinical covariates tested changes in outcomes and diet differences. RESULTS Adjusted weight and HbA1c (n = 38) changed by -2.7 kg (95% CI -3.8, -1.5, P < .0001) and -0.91 percentage points (95% CI -1.5, -0.30, P = .005), respectively, while adjusted body fat percentage remained stable, on average (P = .21). Hypoglycaemia indices remained unchanged following adjustment (n = 28, P > .05). Variability in all outcomes, including weight change, was considerable (57.9% were re-randomized primarily due to loss of <2% body weight). No outcomes varied by diet. CONCLUSIONS Three months of a diet, irrespective of macronutrient distribution or caloric restriction, resulted in weight loss while improving or maintaining HbA1c levels without increasing hypoglycaemia in adults with T1D.
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Affiliation(s)
- Daria Igudesman
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - Jamie Crandell
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - Dessi P Zaharieva
- Department of Pediatrics, Division of Endocrinology, Stanford University, Stanford, California, USA
| | - Ananta Addala
- Department of Pediatrics, Division of Endocrinology, Stanford University, Stanford, California, USA
| | - Joan M Thomas
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Anna Casu
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - M Sue Kirkman
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Teeranan Pokaprakarn
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Michael C Riddell
- School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Kyle Burger
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Richard E Pratley
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - Michael R Kosorok
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - David M Maahs
- Department of Pediatrics, Division of Endocrinology, Stanford University, Stanford, California, USA
| | - Elizabeth J Mayer-Davis
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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Corbin KD, Dagogo-Jack S, Cannon CP, Cherney DZI, Cosentino F, Frederich R, Liu J, Pong A, Lin J, Cater NB, Pratley RE. Cardiorenal outcomes by indices of liver steatosis and fibrosis in individuals with type 2 diabetes and atherosclerotic cardiovascular disease: Analyses from VERTIS CV, a randomized trial of the sodium-glucose cotransporter-2 inhibitor ertugliflozin. Diabetes Obes Metab 2023; 25:758-766. [PMID: 36394384 DOI: 10.1111/dom.14923] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/08/2022] [Accepted: 11/16/2022] [Indexed: 11/19/2022]
Abstract
AIM To conduct a post hoc analysis to explore indices of hepatic steatosis/fibrosis and cardiorenal outcomes in the VERTIS CV study. MATERIALS AND METHODS Patients with type 2 diabetes and atherosclerotic cardiovascular (CV) disease were randomized to ertugliflozin or placebo. Liver steatosis and fibrosis were assessed post hoc using the hepatic steatosis index (HSI) and fibrosis-4 (FIB-4) index to explore associations with cardiorenal outcomes (ertugliflozin and placebo data pooled, intention-to-treat analysis set). Cardiorenal outcomes (major adverse CV events [MACE]; hospitalization for heart failure [HHF]/CV death; CV death; HHF; and a composite kidney outcome) were stratified by baseline HSI and FIB-4 quartiles (Q1-Q4). Change in liver indices and enzymes over time were assessed (for ertugliflozin vs. placebo). RESULTS Amongst 8246 participants, the mean age was 64.4 years, body mass index 32.0 kg/m2 , HSI 44.0 and FIB-4 score 1.34. The hazard ratios (HRs) for MACE, HHF/CV death, CV death, and HHF by FIB-4 score quartile (Q4 vs. Q1) were 1.48 (95% confidence interval [CI] 1.25, 1.76), 2.0 (95% CI 1.63, 2.51), 1.85 (95% CI 1.45, 2.36), and 2.94 (95% CI 1.98, 4.37), respectively (P < 0.0001 for all). With HSI, the incidence of HHF was higher in Q4 versus Q1 (HR 1.52 [95% CI 1.07, 2.17]; P < 0.05). The kidney composite outcome did not differ across FIB-4 or HSI quartiles. Liver enzymes and HSI decreased over time with ertugliflozin. CONCLUSION In VERTIS CV, higher FIB-4 score was associated with CV events. HSI correlated with HHF. Neither measure was associated with the composite kidney outcome. Ertugliflozin was associated with a reduction in liver enzymes and HSI.
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Affiliation(s)
- Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | | | - Christopher P Cannon
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Francesco Cosentino
- Unit of Cardiology, Karolinska Institute & Karolinska University Hospital, Stockholm, Sweden
| | | | - Jie Liu
- Merck & Co., Inc., Rahway, New Jersey, USA
| | | | | | | | - Richard E Pratley
- AdventHealth Translational Research Institute, Orlando, Florida, USA
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Igudesman D, Crandell J, Corbin KD, Zaharieva DP, Addala A, Thomas JM, Bulik CM, Pence BW, Pratley RE, Kosorok MR, Maahs DM, Carroll IM, Mayer-Davis EJ. Associations of disordered eating with the intestinal microbiota and short-chain fatty acids among young adults with type 1 diabetes. Nutr Metab Cardiovasc Dis 2023; 33:388-398. [PMID: 36586772 PMCID: PMC9925402 DOI: 10.1016/j.numecd.2022.11.017] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 11/05/2022] [Accepted: 11/10/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND AND AIMS Disordered eating (DE) in type 1 diabetes (T1D) includes insulin restriction for weight loss with serious complications. Gut microbiota-derived short chain fatty acids (SCFA) may benefit host metabolism but are reduced in T1D. We evaluated the hypothesis that DE and insulin restriction were associated with reduced SCFA-producing gut microbes, SCFA, and intestinal microbial diversity in adults with T1D. METHODS AND RESULTS We collected stool samples at four timepoints in a hypothesis-generating gut microbiome pilot study ancillary to a weight management pilot in young adults with T1D. 16S ribosomal RNA gene sequencing measured the normalized abundance of SCFA-producing intestinal microbes. Gas-chromatography mass-spectrometry measured SCFA (total, acetate, butyrate, and propionate). The Diabetes Eating Problem Survey-Revised (DEPS-R) assessed DE and insulin restriction. Covariate-adjusted and Bonferroni-corrected generalized estimating equations modeled the associations. COVID-19 interrupted data collection, so models were repeated restricted to pre-COVID-19 data. Data were available for 45 participants at 109 visits, which included 42 participants at 65 visits pre-COVID-19. Participants reported restricting insulin "At least sometimes" at 53.3% of visits. Pre-COVID-19, each 5-point DEPS-R increase was associated with a -0.34 (95% CI -0.56, -0.13, p = 0.07) lower normalized abundance of genus Anaerostipes; and the normalized abundance of Lachnospira genus was -0.94 (95% CI -1.5, -0.42), p = 0.02 lower when insulin restriction was reported "At least sometimes" compared to "Rarely or Never". CONCLUSION DE and insulin restriction were associated with a reduced abundance of SCFA-producing gut microbes pre-COVID-19. Additional studies are needed to confirm these associations to inform microbiota-based therapies in T1D.
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Affiliation(s)
- Daria Igudesman
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA; AdventHealth Translational Research Institute, Orlando, 32804, USA.
| | - Jamie Crandell
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA
| | - Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, 32804, USA
| | - Dessi P Zaharieva
- Department of Pediatrics, Division of Endocrinology, Stanford University, Stanford, 94304, USA
| | - Ananta Addala
- Department of Pediatrics, Division of Endocrinology, Stanford University, Stanford, 94304, USA
| | - Joan M Thomas
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA
| | - Cynthia M Bulik
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA; Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, USA; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Brian W Pence
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA
| | | | - Michael R Kosorok
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA
| | - David M Maahs
- Department of Pediatrics, Division of Endocrinology, Stanford University, Stanford, 94304, USA
| | - Ian M Carroll
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA
| | - Elizabeth J Mayer-Davis
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA; Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, 27599, USA
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Corbin KD, Carnero EA, Allerton TD, Tillner J, Bock CP, Luyet PP, Göbel B, Hall KD, Parsons SA, Ravussin E, Smith SR. Glucagon-like peptide-1/glucagon receptor agonism associates with reduced metabolic adaptation and higher fat oxidation: A randomized trial. Obesity (Silver Spring) 2023; 31:350-362. [PMID: 36695055 PMCID: PMC9881753 DOI: 10.1002/oby.23633] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 09/16/2022] [Accepted: 10/02/2022] [Indexed: 01/26/2023]
Abstract
OBJECTIVE This study tested the hypothesis that treatment with the glucagon-like peptide-1/glucagon receptor agonist SAR425899 would lead to a smaller decrease in sleeping metabolic rate (SMR; kilocalories/day) than expected from the loss of lean and fat mass (metabolic adaptation). METHODS This Phase 1b, double-blind, randomized, placebo-controlled study was conducted at two centers in inpatient metabolic wards. Thirty-five healthy males and females with overweight and obesity (age = 36.5 ± 7.1 years) were randomized to a calorie-reduced diet (-1000 kcal/d) and escalating doses (0.06-0.2 mg/d) of SAR425899 (n = 17) or placebo (n = 18) for 19 days. SMR was measured by whole-room calorimetry. RESULTS Both groups lost weight (-3.68 ± 1.37 kg placebo; -4.83 ± 1.44 kg SAR425899). Those treated with SAR425899 lost more weight, fat mass, and fat free mass (p < 0.05) owing to a greater achieved energy deficit than planned. The SAR425899 group had a smaller reduction in body composition-adjusted SMR (p = 0.002) as compared with placebo, but not 24-hour energy expenditure. Fat oxidation and ketogenesis increased in both groups, with significantly greater increases with SAR425899 (p < 0.05). CONCLUSIONS SAR425899 led to reduced selective metabolic adaptation and increased lipid oxidation, which are believed to be beneficial for weight loss and weight-loss maintenance.
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Affiliation(s)
- Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | - Elvis A Carnero
- AdventHealth Translational Research Institute, Orlando, Florida, USA
| | | | | | | | | | | | - Kevin D Hall
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | | | - Eric Ravussin
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Steven R Smith
- AdventHealth Translational Research Institute, Orlando, Florida, USA
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11
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Sarteau AC, Kahkoska AR, Crandell J, Igudesman D, Corbin KD, Kichler JC, Maahs DM, Muntis F, Pratley R, Seid M, Zaharieva D, Mayer-Davis E. More hypoglycemia not associated with increasing estimated adiposity in youth with type 1 diabetes. Pediatr Res 2023; 93:708-714. [PMID: 35729217 PMCID: PMC10958738 DOI: 10.1038/s41390-022-02129-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 04/08/2022] [Accepted: 05/17/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND Despite the widespread clinical perception that hypoglycemia may drive weight gain in youth with type 1 diabetes (T1D), there is an absence of published evidence supporting this hypothesis. METHODS We estimated the body fat percentage (eBFP) of 211 youth (HbA1c 8.0-13.0%, age 13-16) at baseline, 6, and 18 months of the Flexible Lifestyles Empowering Change trial using validated equations. Group-based trajectory modeling assigned adolescents to sex-specific eBFP groups. Using baseline 7-day blinded continuous glucose monitoring data, "more" vs. "less" percent time spent in hypoglycemia was defined by cut-points using sample median split and clinical guidelines. Adjusted logistic regression estimated the odds of membership in an increasing eBFP group comparing youth with more vs. less baseline hypoglycemia. RESULTS More time spent in clinical hypoglycemia (defined by median split) was associated with 0.29 the odds of increasing eBFP in females (95% CI: 0.12, 0.69; p = 0.005), and 0.33 the odds of stable/increasing eBFP in males (95% CI: 0.14, 0.78; p = 0.01). CONCLUSIONS Hypoglycemia may not be a major driver of weight gain in US youth with T1D and HbA1c ≥8.0. Further studies in different sub-groups are needed to clarify for whom hypoglycemia may drive weight gain and focus future etiological studies and interventions. IMPACT We contribute epidemiological evidence that hypoglycemia may not be a major driver of weight gain in US youth with type 1 diabetes and HbA1c ≥8.0% and highlight the need for studies to prospectively test this hypothesis rooted in clinical perception. Future research should examine the relationship between hypoglycemia and adiposity together with psychosocial, behavioral, and other clinical factors among sub-groups of youth with type 1 diabetes (i.e., who meet glycemic targets or experience a frequency/severity of hypoglycemia above a threshold) to further clarify for whom hypoglycemia may drive weight gain and progress etiological understanding of and interventions for healthy weight maintenance.
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Affiliation(s)
| | - Anna R Kahkoska
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jamie Crandell
- School of Nursing, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Daria Igudesman
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Karen D Corbin
- Translational Research Institute, AdventHealth Orlando, Orlando, FL, USA
| | - Jessica C Kichler
- Department of Psychology, University of Windsor, Windsor, ON, Canada
| | - David M Maahs
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, USA
- Stanford Diabetes Research Center and Health Research and Policy (Epidemiology), Stanford, CA, USA
| | - Frank Muntis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Richard Pratley
- Translational Research Institute, AdventHealth Orlando, Orlando, FL, USA
| | - Michael Seid
- Cincinnati Children's Hospital Medical Center, University of Cincinnati Medical School, Cincinnati, OH, USA
| | - Dessi Zaharieva
- Stanford Diabetes Research Center and Health Research and Policy (Epidemiology), Stanford, CA, USA
| | - Elizabeth Mayer-Davis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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12
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Corbin KD, Carnero EA, Dirks B, Igudesman D, Yi F, Marcus A, Davis TL, Pratley RE, Rittmann BE, Krajmalnik-Brown R, Smith SR. Reprogramming the Human Gut Microbiome Reduces Dietary Energy Harvest. Res Sq 2023:rs.3.rs-2382790. [PMID: 36747835 PMCID: PMC9901041 DOI: 10.21203/rs.3.rs-2382790/v1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The gut microbiome is emerging as a key modulator of host energy balance1. We conducted a quantitative bioenergetics study aimed at understanding microbial and host factors contributing to energy balance. We used a Microbiome Enhancer Diet (MBD) to reprogram the gut microbiome by delivering more dietary substrates to the colon and randomized healthy participants into a within-subject crossover study with a Western Diet (WD) as a comparator. In a metabolic ward where the environment was strictly controlled, we measured energy intake, energy expenditure, and energy output (fecal, urinary, and methane)2. The primary endpoint was the within-participant difference in host metabolizable energy between experimental conditions. The MBD led to an additional 116 ± 56 kcals lost in feces daily and thus, lower metabolizable energy for the host by channeling more energy to the colon and microbes. The MBD drove significant shifts in microbial biomass, community structure, and fermentation, with parallel alterations to the host enteroendocrine system and without altering appetite or energy expenditure. Host metabolizable energy on the MBD had quantitatively significant interindividual variability, which was associated with differences in the composition of the gut microbiota experimentally and colonic transit time and short-chain fatty acid absorption in silico. Our results provide key insights into how a diet designed to optimize the gut microbiome lowers host metabolizable energy in healthy humans.
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Affiliation(s)
- Karen D. Corbin
- AdventHealth Translational Research Institute, Orlando, Florida
| | | | - Blake Dirks
- Biodesign Center for Health through Microbiomes, Tempe, AZ,Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ
| | - Daria Igudesman
- AdventHealth Translational Research Institute, Orlando, Florida
| | - Fanchao Yi
- AdventHealth Translational Research Institute, Orlando, Florida
| | - Andrew Marcus
- Biodesign Center for Health through Microbiomes, Tempe, AZ,Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ
| | - Taylor L. Davis
- Biodesign Center for Health through Microbiomes, Tempe, AZ,Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ
| | | | - Bruce E. Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ,School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ
| | - Rosa Krajmalnik-Brown
- Biodesign Center for Health through Microbiomes, Tempe, AZ,School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ
| | - Steven R. Smith
- AdventHealth Translational Research Institute, Orlando, Florida
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13
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Igudesman D, Crandell J, Corbin KD, Muntis F, Zaharieva DP, Casu A, Thomas JM, Bulik CM, Carroll IM, Pence BW, Pratley RE, Kosorok MR, Maahs DM, Mayer-Davis EJ. The Intestinal Microbiota and Short-Chain Fatty Acids in Association with Advanced Metrics of Glycemia and Adiposity Among Young Adults with Type 1 Diabetes and Overweight or Obesity. Curr Dev Nutr 2022; 6:nzac107. [PMID: 36349343 PMCID: PMC9620390 DOI: 10.1093/cdn/nzac107] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 12/03/2022] Open
Abstract
Background Comanagement of glycemia and adiposity is the cornerstone of cardiometabolic risk reduction in type 1 diabetes (T1D), but targets are often not met. The intestinal microbiota and microbiota-derived short-chain fatty acids (SCFAs) influence glycemia and adiposity but have not been sufficiently investigated in longstanding T1D. Objectives We evaluated the hypothesis that an increased abundance of SCFA-producing gut microbes, fecal SCFAs, and intestinal microbial diversity were associated with improved glycemia but increased adiposity in young adults with longstanding T1D. Methods Participants provided stool samples at ≤4 time points (NCT03651622: https://clinicaltrials.gov/ct2/show/NCT03651622). Sequencing of the 16S ribosomal RNA gene measured abundances of SCFA-producing intestinal microbes. GC-MS measured total and specific SCFAs (acetate, butyrate, propionate). DXA (body fat percentage and percentage lean mass) and anthropometrics (BMI) measured adiposity. Continuous glucose monitoring [percentage of time in range (70-180 mg/dL), above range (>180 mg/dL), and below range (54-69 mg/dL)] and glycated hemoglobin (i.e., HbA1c) assessed glycemia. Adjusted and Bonferroni-corrected generalized estimating equations modeled the associations of SCFA-producing gut microbes, fecal SCFAs, and intestinal microbial diversity with glycemia and adiposity. COVID-19 interrupted data collection, so models were repeated restricted to pre-COVID-19 visits. Results Data were available for ≤45 participants at 101 visits (including 40 participants at 54 visits pre-COVID-19). Abundance of Eubacterium hallii was associated inversely with BMI (all data). Pre-COVID-19, increased fecal propionate was associated with increased percentage of time above range and reduced percentage of time in target and below range; and abundances of 3 SCFA-producing taxa (Ruminococcus gnavus, Eubacterium ventriosum, and Lachnospira) were associated inversely with body fat percentage, of which two microbes were positively associated with percentage lean mass. Abundance of Anaerostipes was associated with reduced percentage of time in range (all data) and with increased body fat percentage and reduced percentage lean mass (pre-COVID-19). Conclusions Unexpectedly, fecal propionate was associated with detriment to glycemia, whereas most SCFA-producing intestinal microbes were associated with benefit to adiposity. Future studies should confirm these associations and determine their potential causal linkages in T1D.This study is registered at clinical.trials.gov (NCT03651622; https://clinicaltrials.gov/ct2/show/NCT03651622).
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Affiliation(s)
- Daria Igudesman
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jamie Crandell
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, FL, USA
| | - Franklin Muntis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Dessi P Zaharieva
- Department of Pediatrics, Division of Endocrinology, Stanford University, Stanford, CA, USA
| | - Anna Casu
- AdventHealth Translational Research Institute, Orlando, FL, USA
| | - Joan M Thomas
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Cynthia M Bulik
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, CA, USA
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Ian M Carroll
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Brian W Pence
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, CA, USA
| | | | - Michael R Kosorok
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - David M Maahs
- Department of Pediatrics, Division of Endocrinology, Stanford University, Stanford, CA, USA
| | - Elizabeth J Mayer-Davis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, CA, USA
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Malespin MH, Barritt AS, Watkins SE, Schoen C, Tincopa MA, Corbin KD, Mospan AR, Munoz B, Trinh HN, Weiss LM, Reddy KR, Loomba R, Kemmer N, Lok AS. Weight Loss and Weight Regain in Usual Clinical Practice: Results From the TARGET-NASH Observational Cohort. Clin Gastroenterol Hepatol 2022; 20:2393-2395.e4. [PMID: 33486083 DOI: 10.1016/j.cgh.2021.01.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 01/12/2021] [Accepted: 01/14/2021] [Indexed: 02/07/2023]
Abstract
First-line treatment for nonalcoholic fatty liver disease (NAFLD) focuses on weight loss through lifestyle modifications.1,2 Weight loss ≥5% results in reduction of steatosis and weight loss ≥10% has been associated with improvement in hepatic inflammation and fibrosis.3 The incidence and sustainability of weight loss among patients with NAFLD were estimated and associating factors identified.
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Affiliation(s)
| | - Alfred Sidney Barritt
- Gastroenterology and Hepatology, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | | | | | - Monica A Tincopa
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Karen D Corbin
- AdventHealth Translational Research Institute, Orlando, Florida
| | | | | | - Huy N Trinh
- San Jose Gastroenterology, San Jose, California
| | | | - K Rajender Reddy
- Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Rohit Loomba
- NAFLD Research Center, Division of Gastroenterology, Department of Medicine, University of California at San Diego, San Diego, California
| | | | - Anna S Lok
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.
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15
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Corbin KD, Igudesman D, Addala A, Casu A, Crandell J, Kosorok MR, Maahs DM, Pokaprakarn T, Pratley RE, Souris KJ, Thomas J, Zaharieva DP, Mayer-Davis E. Design of the advancing care for type 1 diabetes and obesity network energy metabolism and sequential multiple assignment randomized trial nutrition pilot studies: An integrated approach to develop weight management solutions for individuals with type 1 diabetes. Contemp Clin Trials 2022; 117:106765. [PMID: 35460915 DOI: 10.1016/j.cct.2022.106765] [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: 10/06/2021] [Revised: 03/07/2022] [Accepted: 04/14/2022] [Indexed: 11/30/2022]
Abstract
Young adults with type 1 diabetes (T1D) often have difficulty co-managing weight and glycemia. The prevalence of overweight and obesity among individuals with T1D now parallels that of the general population and contributes to dyslipidemia, insulin resistance, and risk for cardiovascular disease. There is a compelling need to develop a program of research designed to optimize two key outcomes-weight management and glycemia-and to address the underlying metabolic processes and behavioral challenges unique to people with T1D. For an intervention addressing these dual outcomes to be effective, it must be appropriate to the unique metabolic phenotype of T1D, and to biological and behavioral responses to glycemia (including hypoglycemia) that relate to weight management. The intervention must also be safe, feasible, and accepted by young adults with T1D. In 2015, we established a consortium called ACT1ON: Advancing Care for Type 1 Diabetes and Obesity Network, a transdisciplinary team of scientists at multiple institutions. The ACT1ON consortium designed a multi-phase study which, in parallel, evaluated the mechanistic aspects of the unique metabolism and energy requirements of individuals with T1D, alongside a rigorous adaptive behavioral intervention to simultaneously facilitate weight management while optimizing glycemia. This manuscript describes the design of our integrative study-comprised of an inpatient mechanistic phase and an outpatient behavioral phase-to generate metabolic, behavioral, feasibility, and acceptability data to support a future, fully powered sequential, multiple assignment, randomized trial to evaluate the best approaches to prevent and treat obesity while co-managing glycemia in people with T1D. Clinicaltrials.gov identifiers: NCT03651622 and NCT03379792. The present study references can be found here: https://clinicaltrials.gov/ct2/show/NCT03651622 https://clinicaltrials.gov/ct2/show/NCT03379792?term=NCT03379792&draw=2&rank=1 Submission Category: "Study Design, Statistical Design, Study Protocols".
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Affiliation(s)
- Karen D Corbin
- AdventHealth, Translational Research Institute, Orlando, FL, United States of America
| | - Daria Igudesman
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America; School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Ananta Addala
- Stanford Diabetes Research Center and Health Research and Policy (Epidemiology), Stanford, CA, United States of America; Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, United States of America
| | - Anna Casu
- AdventHealth, Translational Research Institute, Orlando, FL, United States of America
| | - Jamie Crandell
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Michael R Kosorok
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - David M Maahs
- Stanford Diabetes Research Center and Health Research and Policy (Epidemiology), Stanford, CA, United States of America; Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, United States of America
| | - Teeranan Pokaprakarn
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Richard E Pratley
- AdventHealth, Translational Research Institute, Orlando, FL, United States of America
| | - Katherine J Souris
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America; School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Joan Thomas
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America; School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Dessi P Zaharieva
- Stanford Diabetes Research Center and Health Research and Policy (Epidemiology), Stanford, CA, United States of America; Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, United States of America
| | - Elizabeth Mayer-Davis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America; School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.
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Carnero EA, Bock CP, Distefano G, Corbin KD, Stephens NA, Pratley RE, Smith SR, Goodpaster BH, Sparks LM. Twenty-four hour assessments of substrate oxidation reveal differences in metabolic flexibility in type 2 diabetes that are improved with aerobic training. Diabetologia 2021; 64:2322-2333. [PMID: 34402932 DOI: 10.1007/s00125-021-05535-y] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 05/11/2021] [Indexed: 12/25/2022]
Abstract
AIMS/HYPOTHESIS The aim of this study was to assess metabolic flexibility (MetFlex) in participants with type 2 diabetes within the physiologically relevant conditions of sleeping, the post-absorptive (fasting) state and during meals using 24 h whole-room indirect calorimetry (WRIC) and to determine the impact of aerobic training on these novel features of MetFlex. METHODS Normal-weight, active healthy individuals (active; n = 9), obese individuals without type 2 diabetes (ND; n = 9) and obese individuals with type 2 diabetes (n = 23) completed baseline metabolic assessments. The type 2 diabetes group underwent a 10 week supervised aerobic training intervention and repeated the metabolic assessments. MetFlex was assessed by indirect calorimetry in response to insulin infusion and during a 24 h period in a whole-room indirect calorimeter. Indices of MetFlex evaluated by WRIC included mean RQ and RQ kinetic responses after ingesting a standard high-carbohydrate breakfast (RQBF) and sleep RQ (RQsleep). Muscle mitochondrial energetics were assessed in the vastus lateralis muscle in vivo and ex vivo using 31P-magnetic resonance spectroscopy and high-resolution respirometry, respectively. RESULTS The three groups had significantly different RQsleep values (active 0.823 ± 0.04, ND 0.860 ± 0.01, type 2 diabetes 0.842 ± 0.03; p < 0.05). The active group had significantly faster RQBF and more stable RQsleep responses than the ND and type 2 diabetes groups, as demonstrated by steeper and flatter slopes, respectively. Following the training intervention, the type 2 diabetes group displayed significantly increased RQBF slope. Several indices of RQ kinetics had significant associations with in vivo and ex vivo muscle mitochondrial capacities. CONCLUSIONS/INTERPRETATION Twenty-four hour WRIC revealed that physiological RQ responses exemplify differences in MetFlex across a spectrum of metabolic health and correlated with skeletal muscle mitochondrial energetics. Defects in certain features of MetFlex were improved with aerobic training, emphasising the need to assess multiple aspects of MetFlex and disentangle insulin resistance from MetFlex in type 2 diabetes. TRIAL REGISTRATION ClinicalTrials.gov NCT01911104. FUNDING This study was funded by the ADA (grant no. 7-13-JF-53).
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Affiliation(s)
- Elvis A Carnero
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | | | | | - Karen D Corbin
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | | | | | - Steven R Smith
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | | | - Lauren M Sparks
- Translational Research Institute, AdventHealth, Orlando, FL, USA.
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Allerton TD, Carnero EA, Bock C, Corbin KD, Luyet PP, Smith SR, Ravussin E. Reliability of measurements of energy expenditure and substrate oxidation using whole-room indirect calorimetry. Obesity (Silver Spring) 2021; 29:1508-1515. [PMID: 34355521 PMCID: PMC9178907 DOI: 10.1002/oby.23226] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/04/2021] [Accepted: 05/04/2021] [Indexed: 11/10/2022]
Abstract
OBJECTIVE This analysis aimed to measure the intraparticipant reliability-the intraclass correlation coefficient-of all the components of daily energy expenditure (EE) (24-hour EE, sleep EE, resting EE, basal EE, and thermic effect of food) over a period of 3 consecutive days in 35 study participants. METHODS The components of daily EE and substrate use (respiratory exchange ratio) were measured over 3 consecutive days before and after a 3-week 1,000-kcal/d caloric restriction/weight-loss intervention. RESULTS There was a high degree of reliability for sleep EE (96.8%), 24-hour EE (97.8%), basal EE (90.6%), and resting EE (93.2%) during the run-in period. The intraclass correlation coefficient for the follow-up period after weight loss (3.67 ± 1.10 kg) remained high for sleep EE (95.6%), 24-hour EE (100%), basal EE (96.1%), and resting EE (92.5%). The minimal detectable differences in EE were reduced by 30% for both 24-hour EE and sleep EE when comparing 2 days versus 1 day spent in the whole-room indirect calorimeter. CONCLUSIONS The reliability of the daily components of EE is very high both prior to and after a weight-loss intervention. We here provide instrumental data for investigators to adequately power studies investigating energy metabolism using whole-room indirect calorimetry.
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Affiliation(s)
| | | | | | | | | | | | - Eric Ravussin
- Pennington Biomedical Research Center, Baton Rouge, LA
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18
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Whytock KL, Corbin KD, Parsons SA, Pachori A, Bock CP, Jones KP, Smith JS, Yi F, Xie H, Petucci CJ, Gardell SJ, Smith SR. Metabolic adaptation characterizes short-term resistance to weight loss induced by a low-calorie diet in overweight/obese individuals. Am J Clin Nutr 2021; 114:267-280. [PMID: 33826697 DOI: 10.1093/ajcn/nqab027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 09/10/2020] [Accepted: 01/28/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Low-calorie diet (LCD)-induced weight loss demonstrates response heterogeneity. Physiologically, a decrease in energy expenditure lower than what is predicted based on body composition (metabolic adaptation) and/or an impaired capacity to increase fat oxidation may hinder weight loss. Understanding the metabolic components that characterize weight loss success is important for optimizing weight loss strategies. OBJECTIVES We tested the hypothesis that overweight/obese individuals who had lower than expected weight loss in response to a 28-d LCD would be characterized by 1) impaired fat oxidation and 2) whole-body metabolic adaptation. We also characterized the molecular mechanisms associated with weight loss success/failure. METHODS This was a retrospective comparison of participants who met their predicted weight loss targets [overweight/obese diet sensitive (ODS), n = 23, females = 21, males = 2] and those that did not [overweight/obese diet resistant (ODR), n = 14, females = 12, males = 2] after a 28-d LCD (900-1000 kcal/d). We used whole-body (energy expenditure and fat oxidation) and tissue-specific measurements (metabolic proteins in skeletal muscle, gene expression in adipose tissue, and metabolites in serum) to detect metabolic properties and biomarkers associated with weight loss success. RESULTS The ODR group had greater mean ± SD metabolic adaptation (-175 ± 149 kcal/d; +119%) than the ODS group (-80 ± 108 kcal/d) after the LCD (P = 0.030). Mean ± SD fat oxidation increased similarly for both groups from baseline (0.0701 ± 0.0206 g/min) to day 28 (0.0869 ± 0.0269 g/min; P < 0.001). A principal component analysis factor comprised of serum 3-hydroxybutyric acid, citrate, leucine/isoleucine, acetyl-carnitine, and 3-hydroxylbutyrlcarnitine was associated with weight loss success at day 28 (std. β = 0.674, R2 = 0.479, P < 0.001). CONCLUSIONS Individuals who achieved predicted weight loss targets after a 28-d LCD were characterized by reduced metabolic adaptation. Accumulation of metabolites associated with acetyl-CoA excess and enhanced ketogenesis was identified in the ODS group.This trial was registered at clinicaltrials.gov as NCT01616082.
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Affiliation(s)
- Katie L Whytock
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Karen D Corbin
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | | | - Alok Pachori
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | | | - Karen P Jones
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Joshua S Smith
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Fanchao Yi
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Hui Xie
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Christopher J Petucci
- Translational Research Institute, AdventHealth, Orlando, FL, USA.,Cardiovascular Institute and Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | | | - Steven R Smith
- Translational Research Institute, AdventHealth, Orlando, FL, USA
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19
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Saxena AR, Banerjee A, Corbin KD, Parsons SA, Smith SR. Energy intake as a short-term biomarker for weight loss in adults with obesity receiving liraglutide: A randomized trial. Obes Sci Pract 2021; 7:281-290. [PMID: 34123395 PMCID: PMC8170575 DOI: 10.1002/osp4.486] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 12/23/2020] [Accepted: 01/23/2021] [Indexed: 12/02/2022] Open
Abstract
Background and Objective Obesity is a chronic disease associated with many serious comorbidities. Pharmacologic therapies are approved for the treatment of obesity; however, short‐term biomarkers to predict weight loss are not well understood. This study aimed to determine the ability of single‐meal energy intake (EI) to predict weight loss in participants with obesity treated with liraglutide. Methods In this randomized, double‐blind, placebo‐controlled study, participants received subcutaneous liraglutide (titrated to 3.0 mg/day) or placebo once daily, with inpatient assessments at baseline and weeks 3 and 6. The primary endpoint was change from baseline (CFB) in EI during consecutive ad libitum lunch meals at weeks 3 and 6. Secondary endpoints included CFB in 24‐ and 48‐h EI, weight, appetite scores, and gastric emptying measures. Results Sixty‐one participants were randomized (n = 32, liraglutide; n = 29, placebo). The least squares mean (LSM) difference (95% CI; p‐value) in CFB in EI during ad libitum lunch meals between the liraglutide and placebo groups was −236 (−322, −149; p < 0.0001) kcal at week 3 and –244 (−339, −148, p < 0.0001) kcal at week 6. The liraglutide group experienced significant weight loss at weeks 3 and 6, compared with placebo. Weight loss was significantly correlated with EI, but not with appetite score or gastric emptying. Conclusions EI during a single meal is a robust clinical predictor of weight changes in participants with obesity. Future clinical trials can utilize EI at a single meal as a predictor of weight loss.
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Affiliation(s)
- Aditi R Saxena
- Worldwide Research and Development Pfizer Inc Cambridge Massachusetts USA
| | - Anindita Banerjee
- Worldwide Research and Development Pfizer Inc Cambridge Massachusetts USA
| | - Karen D Corbin
- AdventHealth Translational Research Institute Orlando Florida USA
| | | | - Steven R Smith
- AdventHealth Translational Research Institute Orlando Florida USA
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20
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Davis TL, Dirks B, Carnero EA, Corbin KD, Krakoff J, Parrington S, Lee D, Smith SR, Rittmann BE, Krajmalnik-Brown R, Marcus AK. Chemical Oxygen Demand Can Be Converted to Gross Energy for Food Items Using a Linear Regression Model. J Nutr 2021; 151:445-453. [PMID: 33188419 PMCID: PMC7850027 DOI: 10.1093/jn/nxaa321] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 05/19/2020] [Revised: 07/20/2020] [Accepted: 09/23/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Human and microbial metabolism are distinct disciplines. Terminology, metrics, and methodologies have been developed separately. Therefore, combining the 2 fields to study energetic processes simultaneously is difficult. OBJECTIVES When developing a mechanistic framework describing gut microbiome and human metabolism interactions, energy values of food and digestive materials that use consistent and compatible metrics are required. As an initial step toward this goal, we developed and validated a model to convert between chemical oxygen demand (COD) and gross energy (${E_g}$) for >100 food items and ingredients. METHODS We developed linear regression models to relate (and be able to convert between) theoretical gross energy (${E_g}^{\prime}$) and chemical oxygen demand (COD'); the latter is a measure of electron equivalents in the food's carbon. We developed an overall regression model for the food items as a whole and separate regression models for the carbohydrate, protein, and fat components. The models were validated using a sample set of computed ${E_g}^{\prime}$ and COD' values, an experimental sample set using measured ${E_g}$ and COD values, and robust statistical methods. RESULTS The overall linear regression model and the carbohydrate, protein, and fat regression models accurately converted between COD and ${E_g}$, and the component models had smaller error. Because the ratios of COD per gram dry weight were greatest for fats and smallest for carbohydrates, foods with a high fat content also had higher ${E_g}$ values in terms of kcal · g dry weight-1. CONCLUSION Our models make it possible to analyze human and microbial energetic processes in concert using a single unit of measure, which fills an important need in the food-nutrition-metabolism-microbiome field. In addition, measuring COD and using the regressions to calculate ${E_g}$ can be used instead of measuring ${E_g}$ directly using bomb calorimetry, which saves time and money.
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Affiliation(s)
- Taylor L Davis
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Blake Dirks
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Elvis A Carnero
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Karen D Corbin
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Jonathon Krakoff
- National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, AZ, USA
| | - Shannon Parrington
- National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, AZ, USA
| | - Donghun Lee
- National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, AZ, USA
| | - Steven R Smith
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Bruce E Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Rosa Krajmalnik-Brown
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Andrew K Marcus
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
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21
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Corbin KD, Krajmalnik-Brown R, Carnero EA, Bock C, Emerson R, Rittmann BE, Marcus AK, Davis T, Dirks B, Ilhan ZE, Champagne C, Smith SR. Integrative and quantitative bioenergetics: Design of a study to assess the impact of the gut microbiome on host energy balance. Contemp Clin Trials Commun 2020; 19:100646. [PMID: 32875141 PMCID: PMC7451766 DOI: 10.1016/j.conctc.2020.100646] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/03/2020] [Accepted: 08/16/2020] [Indexed: 02/07/2023] Open
Abstract
The literature is replete with clinical studies that characterize the structure, diversity, and function of the gut microbiome and correlate the results to different disease states, including obesity. Whether the microbiome has a direct impact on obesity has not been established. To address this gap, we asked whether the gut microbiome and its bioenergetics quantitatively change host energy balance. This paper describes the design of a randomized crossover clinical trial that combines outpatient feeding with precisely controlled metabolic phenotyping in an inpatient metabolic ward. The target population was healthy, weight-stable individuals, age 18-45 and with a body mass index ≤30 kg/m2. Our primary objective was to determine within-participant differences in energy balance after consuming a control Western Diet versus a Microbiome Enhancer Diet intervention specifically designed to optimize the gut microbiome for positive impacts on host energy balance. We assessed the complete energy-balance equation via whole-room calorimetry, quantified energy intake, fecal energy losses, and methane production. We implemented conditions of tight weight stability and balance between metabolizable energy intake and predicted energy expenditure. We explored key factors that modulate the balance between host and microbial nutrient accessibility by measuring enteroendocrine hormone profiles, appetite/satiety, gut transit and gastric emptying. By integrating these clinical measurements with future bioreactor experiments, gut microbial ecology analysis, and mathematical modeling, our goal is to describe initial cause-and-effect mechanisms of gut microbiome metabolism on host energy balance. Our innovative methods will enable subsequent studies on the interacting roles of diet, the gut microbiome, and human physiology. CLINICALTRIALSGOV IDENTIFIER NCT02939703. The present study reference can be found here: https://clinicaltrials.gov/ct2/show/NCT02939703.
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Key Words
- BMI, body mass index
- Bioenergetics
- COD, chemical oxygen demand
- Calorimeter
- Chemical oxygen demand
- DEXA, dual energy x-ray absorptiometry
- EB, energy balance
- EE, energy expenditure
- EI, energy intake
- Energy balance
- MFC, mass flow controller
- Microbiome
- NIST, national institute of standards technology
- PEG, polyethylene glycol
- RMR, resting metabolic rate
- RQ, respiratory quotient
- SCFA, short chain fatty acid
- SEE, sleep energy expenditure
- TDEE, total daily energy expenditure
- TEF, thermic effect of food
- VAS, visual analog scale
- VCH4, volume of methane produced
- VCO2, volume of carbon dioxide produced
- VO2, volume of oxygen consume
- npRQ, non-protein RQ
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Affiliation(s)
- Karen D. Corbin
- AdventHealth, Translational Research Institute, Orlando, FL, USA
| | - Rosa Krajmalnik-Brown
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA
| | - Elvis A. Carnero
- AdventHealth, Translational Research Institute, Orlando, FL, USA
| | - Christopher Bock
- AdventHealth, Translational Research Institute, Orlando, FL, USA
| | - Rita Emerson
- AdventHealth, Translational Research Institute, Orlando, FL, USA
| | - Bruce E. Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA
| | - Andrew K. Marcus
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Taylor Davis
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Blake Dirks
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Zehra Esra Ilhan
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | | | - Steven R. Smith
- AdventHealth, Translational Research Institute, Orlando, FL, USA
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22
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Corbin KD, Driscoll KA, Pratley RE, Smith SR, Maahs DM, Mayer-Davis EJ. Obesity in Type 1 Diabetes: Pathophysiology, Clinical Impact, and Mechanisms. Endocr Rev 2018; 39:629-663. [PMID: 30060120 DOI: 10.1210/er.2017-00191] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 06/21/2018] [Indexed: 02/07/2023]
Abstract
There has been an alarming increase in the prevalence of obesity in people with type 1 diabetes in recent years. Although obesity has long been recognized as a major risk factor for the development of type 2 diabetes and a catalyst for complications, much less is known about the role of obesity in the initiation and pathogenesis of type 1 diabetes. Emerging evidence suggests that obesity contributes to insulin resistance, dyslipidemia, and cardiometabolic complications in type 1 diabetes. Unique therapeutic strategies may be required to address these comorbidities within the context of intensive insulin therapy, which promotes weight gain. There is an urgent need for clinical guidelines for the prevention and management of obesity in type 1 diabetes. The development of these recommendations will require a transdisciplinary research strategy addressing metabolism, molecular mechanisms, lifestyle, neuropsychology, and novel therapeutics. In this review, the prevalence, clinical impact, energy balance physiology, and potential mechanisms of obesity in type 1 diabetes are described, with a special focus on the substantial gaps in knowledge in this field. Our goal is to provide a framework for the evidence base needed to develop type 1 diabetes-specific weight management recommendations that account for the competing outcomes of glycemic control and weight management.
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Affiliation(s)
- Karen D Corbin
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - Kimberly A Driscoll
- Department of Pediatrics, School of Medicine, University of Colorado Denver, Aurora, Colorado.,Barbara Davis Center for Diabetes, Aurora, Colorado
| | - Richard E Pratley
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - Steven R Smith
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - David M Maahs
- Division of Pediatric Endocrinology, Department of Pediatrics, Stanford University, Stanford, California
| | - Elizabeth J Mayer-Davis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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23
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Driscoll KA, Corbin KD, Maahs DM, Pratley R, Bishop FK, Kahkoska A, Hood KK, Mayer-Davis E. Biopsychosocial Aspects of Weight Management in Type 1 Diabetes: a Review and Next Steps. Curr Diab Rep 2017; 17:58. [PMID: 28660565 PMCID: PMC6053070 DOI: 10.1007/s11892-017-0892-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE OF REVIEW This review aims to summarize the type 1 diabetes (T1D) and weight literature with an emphasis on barriers associated with weight management, the unique T1D-specific factors that impact weight loss success, maladaptive and adaptive strategies for weight loss, and interventions to promote weight loss. RECENT FINDINGS Weight gain is associated with intensive insulin therapy. Overweight and obese weight status in individuals with T1D is higher than the general population and prevalence is rising. A variety of demographic (e.g., female sex), clinical (e.g., greater insulin needs), environmental (e.g., skipping meals), and psychosocial (e.g., depression, stress) factors are associated with overweight/obese weight status in T1D. Fear of hypoglycemia is a significant barrier to engagement in physical activity. Studies evaluating adaptive weight loss strategies in people with T1D are limited. There is a growing literature highlighting the prevalence and seriousness of overweight and obesity among both youth and adults with T1D. There is an urgent need to develop evidence-based weight management guidelines and interventions that address the unique concerns of individuals with T1D and that concurrently address glycemic control.
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Affiliation(s)
- Kimberly A Driscoll
- Barbara Davis Center for Diabetes, University of Colorado Denver, 1775 Aurora Ct, Aurora, CO, 80045, USA.
| | - Karen D Corbin
- Florida Hospital Translational Research Institute for Metabolism and Diabetes, 301 East Princeton Street, Orlando, FL, 32804, USA
| | - David M Maahs
- Division of Endocrinology, Department of Pediatrics, Stanford University, 300 Pasteur Dr, Stanford, CA, 94305, USA
| | - Richard Pratley
- Florida Hospital Translational Research Institute for Metabolism and Diabetes, 301 East Princeton Street, Orlando, FL, 32804, USA
| | - Franziska K Bishop
- Barbara Davis Center for Diabetes, University of Colorado Denver, 1775 Aurora Ct, Aurora, CO, 80045, USA
| | - Anna Kahkoska
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 135 Dauer Drive, Chapel Hill, NC, 27599, USA
| | - Korey K Hood
- Division of Endocrinology, Department of Pediatrics, Stanford University, 300 Pasteur Dr, Stanford, CA, 94305, USA
| | - Elizabeth Mayer-Davis
- Department of Nutrition, The University of North Carolina Chapel Hill, Chapel Hill, NC, 27599-7461, USA
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24
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May PA, Hamrick KJ, Corbin KD, Hasken JM, Marais AS, Blankenship J, Hoyme HE, Gossage JP. Maternal nutritional status as a contributing factor for the risk of fetal alcohol spectrum disorders. Reprod Toxicol 2015; 59:101-8. [PMID: 26656914 DOI: 10.1016/j.reprotox.2015.11.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [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: 10/08/2015] [Accepted: 11/17/2015] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Compare nutritional status of 57 South African mothers of children with fetal alcohol spectrum disorders (FASD) with 148 mothers of controls. METHODS Dietary data were analyzed for macronutrients, micronutrients, and fats via estimated average requirements (EAR) and adequate intakes (AI) for pregnant women. RESULTS Virtually all mothers were likely deficient on most micronutrients by either EAR (<50%) or AI values. Mothers of FASD children consumed more of 13 of 25 micronutrients. For percentage below EAR, only vitamin D was significantly higher for FASD mothers. Despite no difference in total food intake, control mothers had a higher mean body mass index (BMI) than FASD mothers. Maternal BMI is more significant for positive child outcomes than any individual nutrient. CONCLUSIONS Most mothers have inadequate dietary intake. Minor advantages in nutrient intake are overpowered by teratogenic effects of alcohol. Further study is needed of the interaction of alcohol, maternal nutrition, and metabolism.
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Affiliation(s)
- Philip A May
- University of North Carolina at Chapel Hill, Nutrition Research Institute, Gillings School of Global Public Health, USA; The University of New Mexico Center on Alcoholism, Substance Abuse, and Addictions (CASAA), Albuquerque, USA.
| | | | - Karen D Corbin
- Florida Hospital, Translational Research Institute for Metabolism and Diabetes, USA
| | - Julie M Hasken
- University of North Carolina at Chapel Hill, Nutrition Research Institute, Gillings School of Global Public Health, USA
| | - Anna-Susan Marais
- Stellenbosch University, Faculty of Medicine and Health Sciences, Tygerberg, South Africa; University of Cape Town, Foundation for Alcohol Related Research (FARR), Cape Town, South Africa
| | - Jason Blankenship
- The University of New Mexico Center on Alcoholism, Substance Abuse, and Addictions (CASAA), Albuquerque, USA
| | - H Eugene Hoyme
- Sanford School of Medicine, The University of South Dakota, Sioux Falls, USA
| | - J Phillip Gossage
- The University of New Mexico Center on Alcoholism, Substance Abuse, and Addictions (CASAA), Albuquerque, USA
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25
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Silver MJ, Corbin KD, Hellenthal G, da Costa KA, Dominguez-Salas P, Moore SE, Owen J, Prentice AM, Hennig BJ, Zeisel SH. Evidence for negative selection of gene variants that increase dependence on dietary choline in a Gambian cohort. FASEB J 2015; 29:3426-35. [PMID: 25921832 PMCID: PMC4511208 DOI: 10.1096/fj.15-271056] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 02/09/2015] [Accepted: 04/16/2015] [Indexed: 01/26/2023]
Abstract
Choline is an essential nutrient, and the amount needed in the diet is modulated by
several factors. Given geographical differences in dietary choline intake and
disparate frequencies of single-nucleotide polymorphisms (SNPs) in choline metabolism
genes between ethnic groups, we tested the hypothesis that 3 SNPs that increase
dependence on dietary choline would be under negative selection pressure in settings
where choline intake is low: choline dehydrogenase (CHDH) rs12676,
methylenetetrahydrofolate reductase 1 (MTHFD1) rs2236225, and
phosphatidylethanolamine-N-methyltransferase
(PEMT) rs12325817. Evidence of negative selection was assessed in
2 populations: one in The Gambia, West Africa, where there is historic evidence of a
choline-poor diet, and the other in the United States, with a comparatively
choline-rich diet. We used 2 independent methods, and confirmation of our hypothesis
was sought via a comparison with SNP data from the Maasai, an East
African population with a genetic background similar to that of Gambians but with a
traditional diet that is higher in choline. Our results show that frequencies of SNPs
known to increase dependence on dietary choline are significantly reduced in the
low-choline setting of The Gambia. Our findings suggest that adequate intake levels
of choline may have to be reevaluated in different ethnic groups and highlight a
possible approach for identifying novel functional SNPs under the influence of
dietary selective pressure.—Silver, M. J., Corbin, K. D., Hellenthal, G., da
Costa, K.-A., Dominguez-Salas, P., Moore, S. E., Owen, J., Prentice, A. M., Hennig,
B. J., Zeisel, S. H. Evidence for negative selection of gene variants that increase
dependence on dietary choline in a Gambian cohort.
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Affiliation(s)
- Matt J Silver
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Karen D Corbin
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Garrett Hellenthal
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Kerry-Ann da Costa
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Paula Dominguez-Salas
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Sophie E Moore
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Jennifer Owen
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Andrew M Prentice
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Branwen J Hennig
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Steven H Zeisel
- *Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; Medical Research Council Unit, Banjul, The Gambia; Nutrition Research Institute, North Carolina Research Campus, Kannapolis, North Carolina, USA; Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; University College London Genetics Institute, University College London, United Kingdom; Toxicology Services, Incorporated, Chapel Hill, North Carolina, USA; and Maternal and Child Nutrition Group, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
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Miller CA, Corbin KD, da Costa KA, Zhang S, Zhao X, Galanko JA, Blevins T, Bennett BJ, O'Connor A, Zeisel SH. Effect of egg ingestion on trimethylamine-N-oxide production in humans: a randomized, controlled, dose-response study. Am J Clin Nutr 2014; 100:778-86. [PMID: 24944063 PMCID: PMC4135488 DOI: 10.3945/ajcn.114.087692] [Citation(s) in RCA: 171] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND It is important to understand whether eating eggs, which are a major source of dietary choline, results in increased exposure to trimethylamine-N-oxide (TMAO), which is purported to be a risk factor for developing heart disease. OBJECTIVE We determined whether humans eating eggs generate TMAO and, if so, whether there is an associated increase in a marker for inflammation [ie, high-sensitivity C-reactive protein (hsCRP)] or increased oxidation of low-density lipoprotein (LDL). DESIGN In a longitudinal, double-blind, randomized dietary intervention, 6 volunteers were fed breakfast doses of 0, 1, 2, 4, or 6 egg yolks. Diets were otherwise controlled on the day before and day of each egg dose with a standardized low-choline menu. Plasma TMAO at timed intervals (immediately before and 1, 2, 4, 8, and 24 h after each dose), 24-h urine TMAO, predose and 24-h postdose serum hsCRP, and plasma oxidized LDL were measured. Volunteers received all 5 doses with each dose separated by >2-wk washout periods. RESULTS The consumption of eggs was associated with increased plasma and urine TMAO concentrations (P < 0.01), with ∼14% of the total choline in eggs having been converted to TMAO. There was considerable variation between individuals in the TMAO response. There was no difference in hsCRP or oxidized LDL concentrations after egg doses. CONCLUSIONS The consumption of ≥2 eggs results in an increased formation of TMAO. Choline is an essential nutrient that is required for normal human liver and muscle functions and important for normal fetal development. Additional study is needed to both confirm the association between TMAO and atherosclerosis and identify factors, microbiota and genetic, that influence the generation of TMAO before policy and medical recommendations are made that suggest reduced dietary choline intake.
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Affiliation(s)
- Carolyn A Miller
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Karen D Corbin
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Kerry-Ann da Costa
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Shucha Zhang
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Xueqing Zhao
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Joseph A Galanko
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Tondra Blevins
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Brian J Bennett
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Annalouise O'Connor
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Steven H Zeisel
- From the Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC (CAM, KDC, SZ, XZ, TB, BJB, AO, and SHZ), and the Department of Nutrition, School of Public Health and School of Medicine (K-AdC and SHZ) and Departments of Medicine (JAG) and Genetics (BJB), University of North Carolina at Chapel Hill, Chapel Hill, NC
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da Costa KA, Corbin KD, Niculescu MD, Galanko JA, Zeisel SH. Identification of new genetic polymorphisms that alter the dietary requirement for choline and vary in their distribution across ethnic and racial groups. FASEB J 2014; 28:2970-8. [PMID: 24671709 DOI: 10.1096/fj.14-249557] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Effect alleles (alleles with a polymorphism that is associated with the effect being measured) in a small number of single-nucleotide polymorphisms (SNPs) are known to influence the dietary requirement for choline. In this study, we examined a much larger number of SNPs (n=200) in 10 genes related to choline metabolism for associations with development of organ dysfunction (liver or muscle) when 79 humans were fed a low-choline diet. We confirmed that effect alleles in SNPs such as the C allele of PEMT rs12325817 increase the risk of developing organ dysfunction in women when they consume a diet low in choline, and we identified novel effect alleles, such as the C allele of CHKA SNP rs7928739, that alter dietary choline requirements. When fed a low-choline diet, some people presented with muscle damage rather than liver damage; several effect alleles in SLC44A1 (rs7873937, G allele; rs2771040, G; rs6479313, G; rs16924529, A; and rs3199966, C) and one in CHKB (rs1557502, A) were more common in these individuals. This suggests that pathways related to choline metabolism are more important for normal muscle function than previously thought. In European, Mexican, and Asian Americans, and in individuals of African descent, we examined the prevalence of the effect alleles in SNPs that alter choline requirement and found that they are differentially distributed among people of different ethnic and racial backgrounds. Overall, our study has identified novel genetic variants that modulate choline requirements and suggests that the dietary requirement for choline may be different across racial and ethnic groups.-Da Costa, K.-A., Corbin, K. D., Niculescu, M. D., Galanko, J. A., Zeisel, S. H. Identification of new genetic polymorphisms that alter the dietary requirement for choline and vary in their distribution across ethnic and racial groups.
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Affiliation(s)
- Kerry-Ann da Costa
- Department of Nutrition, School of Public Health, School of Medicine, and
| | - Karen D Corbin
- Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, North Carolina, USA
| | - Mihai D Niculescu
- Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, North Carolina, USA
| | - Joseph A Galanko
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; and
| | - Steven H Zeisel
- Department of Nutrition, School of Public Health, School of Medicine, and Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, North Carolina, USA
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May PA, Hamrick KJ, Corbin KD, Hasken JM, Marais AS, Brooke LE, Blankenship J, Hoyme HE, Gossage JP. Dietary intake, nutrition, and fetal alcohol spectrum disorders in the Western Cape Province of South Africa. Reprod Toxicol 2014; 46:31-9. [PMID: 24568797 DOI: 10.1016/j.reprotox.2014.02.002] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [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: 05/08/2013] [Revised: 01/10/2014] [Accepted: 02/15/2014] [Indexed: 01/30/2023]
Abstract
In this study, we describe the nutritional status of women from a South African community with very high rates of fetal alcohol spectrum disorders (FASD). Nutrient intake (24-h recall) of mothers of children with FASD was compared to mothers of normal controls. Nutrient adequacy was assessed using Dietary Reference Intakes (DRIs). More than 50% of all mothers were below the Estimated Average Requirement (EAR) for vitamins A, D, E, and C, thiamin, riboflavin, vitamin B6, folate, calcium, magnesium, iron, and zinc. Mean intakes were below the Adequate Intake (AI) for vitamin K, potassium, and choline. Mothers of children with FASD reported significantly lower intake of calcium, docosapentaenoic acid (DPA), riboflavin, and choline than controls. Lower intake of multiple key nutrients correlates significantly with heavy drinking. Poor diet quality and multiple nutritional inadequacies coupled with prenatal alcohol exposure may increase the risk for FASD in this population.
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Affiliation(s)
- Philip A May
- University of North Carolina at Chapel Hill, Nutrition Research Institute, Gillings School of Global Public Health, USA; The University of New Mexico Center on Alcoholism, Substance Abuse, and Addictions (CASAA), Albuquerque, USA.
| | | | - Karen D Corbin
- University of North Carolina at Chapel Hill, Nutrition Research Institute, Gillings School of Global Public Health, USA
| | - Julie M Hasken
- University of North Carolina at Chapel Hill, Nutrition Research Institute, Gillings School of Global Public Health, USA
| | - Anna-Susan Marais
- Stellenbosch University, Faculty of Health Sciences, Tygerberg, South Africa
| | - Lesley E Brooke
- Formerly with the University of Cape Town, Foundation for Alcohol Related Research (FARR), Cape Town, South Africa
| | - Jason Blankenship
- The University of New Mexico Center on Alcoholism, Substance Abuse, and Addictions (CASAA), Albuquerque, USA
| | - H Eugene Hoyme
- Sanford Research and Sanford School of Medicine, The University of South Dakota, Sioux Falls, USA
| | - J Phillip Gossage
- The University of New Mexico Center on Alcoholism, Substance Abuse, and Addictions (CASAA), Albuquerque, USA
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O’Connor A, Corbin KD, Nieman DC, Swick AG. A randomized, controlled trial to assess short-term black pepper consumption on 24-hour energy expenditure and substrate utilization. FFHD 2013. [DOI: 10.31989/ffhd.v3i10.38] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background: Thermogenic ingredients may play a role in weight management. In vitro and rodent work suggests that components of black pepper may impact energy expenditure, and in humans, other TPRV1 agonists e.g. capsaicin, augment EE. Objectives: To determine the impact of BP on 24-hour EE, respiratory quotient, and biochemical markers of metabolism and satiety, a randomized, controlled, cross-over study of black pepper (0.5mg/meal) versus no pepper control was conducted in post-menopausal women. Subjects spent two 24-hour periods in a whole room indirect calorimeter. Results: Post-meal glucose, insulin, gut peptides and catecholamines were measured. Energy expenditure, respiratory quotient, or biochemical markers assessed did not differ significantly between the black pepper and no pepper control study days. Conclusions: Our findings do not support a role for black pepper in modulating energy expenditure in overweight postmenopausal women. Future work targeting alternative populations, administering black pepper in the fasted state, or in combination with other spices, may reveal the thermogenic effect of this spice.Trial registration: This trial was registered at clinicaltrials.gov (NCT01729143).Key words: Black pepper, piperine, energy expenditure, metabolic chamber
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Corbin KD, Mei S, Cao W, Zeisel SH. Perturbed 1‐carbon metabolism alters bile acid pools and insulin signaling. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.1077.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Karen D Corbin
- Nutrition Research Institute, UNC Chapel HillKannapolisNC
- Gillings School of Global Public HealthDepartment of NutritionUNC Chapel HillChapel HillNC
| | - Shuang Mei
- Nutrition Research Institute, UNC Chapel HillKannapolisNC
- Gillings School of Global Public HealthDepartment of NutritionUNC Chapel HillChapel HillNC
| | - Wenhong Cao
- Nutrition Research Institute, UNC Chapel HillKannapolisNC
- Gillings School of Global Public HealthDepartment of NutritionUNC Chapel HillChapel HillNC
| | - Steven H Zeisel
- Nutrition Research Institute, UNC Chapel HillKannapolisNC
- Gillings School of Global Public HealthDepartment of NutritionUNC Chapel HillChapel HillNC
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Corbin KD, Abdelmalek MF, Spencer MD, da Costa KA, Galanko JA, Sha W, Suzuki A, Guy CD, Cardona DM, Torquati A, Diehl AM, Zeisel SH. Genetic signatures in choline and 1-carbon metabolism are associated with the severity of hepatic steatosis. FASEB J 2013; 27:1674-89. [PMID: 23292069 DOI: 10.1096/fj.12-219097] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Choline metabolism is important for very low-density lipoprotein secretion, making this nutritional pathway an important contributor to hepatic lipid balance. The purpose of this study was to assess whether the cumulative effects of multiple single nucleotide polymorphisms (SNPs) across genes of choline/1-carbon metabolism and functionally related pathways increase susceptibility to developing hepatic steatosis. In biopsy-characterized cases of nonalcoholic fatty liver disease and controls, we assessed 260 SNPs across 21 genes in choline/1-carbon metabolism. When SNPs were examined individually, using logistic regression, we only identified a single SNP (PNPLA3 rs738409) that was significantly associated with severity of hepatic steatosis after adjusting for confounders and multiple comparisons (P=0.02). However, when groupings of SNPs in similar metabolic pathways were defined using unsupervised hierarchical clustering, we identified groups of subjects with shared SNP signatures that were significantly correlated with steatosis burden (P=0.0002). The lowest and highest steatosis clusters could also be differentiated by ethnicity. However, unique SNP patterns defined steatosis burden irrespective of ethnicity. Our results suggest that analysis of SNP patterns in genes of choline/1-carbon metabolism may be useful for prediction of severity of steatosis in specific subsets of people, and the metabolic inefficiencies caused by these SNPs should be examined further.
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Affiliation(s)
- Karen D Corbin
- University of North Carolina at Chapel Hill Nutrition Research Institute, Kannapolis, NorthCarolina 28081, USA
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Haines RJ, Corbin KD, Pendleton LC, Eichler DC. Protein kinase Cα phosphorylates a novel argininosuccinate synthase site at serine 328 during calcium-dependent stimulation of endothelial nitric-oxide synthase in vascular endothelial cells. J Biol Chem 2012; 287:26168-76. [PMID: 22696221 DOI: 10.1074/jbc.m112.378794] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Endothelial nitric-oxide synthase (eNOS) utilizes l-arginine as its principal substrate, converting it to l-citrulline and nitric oxide (NO). l-Citrulline is recycled to l-arginine by two enzymes, argininosuccinate synthase (AS) and argininosuccinate lyase, providing the substrate arginine for eNOS and NO production in endothelial cells. Together, these three enzymes, eNOS, AS, and argininosuccinate lyase, make up the citrulline-NO cycle. Although AS catalyzes the rate-limiting step in NO production, little is known about the regulation of AS in endothelial cells beyond the level of transcription. In this study, we showed that AS Ser-328 phosphorylation was coordinately regulated with eNOS Ser-1179 phosphorylation when bovine aortic endothelial cells were stimulated by either a calcium ionophore or thapsigargin to produce NO. Furthermore, using in vitro kinase assay, kinase inhibition studies, as well as protein kinase Cα (PKCα) knockdown experiments, we demonstrate that the calcium-dependent phosphorylation of AS Ser-328 is mediated by PKCα. Collectively, these findings suggest that phosphorylation of AS at Ser-328 is regulated in accordance with the calcium-dependent regulation of eNOS under conditions that promote NO production and are in keeping with the rate-limiting role of AS in the citrulline-NO cycle of vascular endothelial cells.
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Affiliation(s)
- Ricci J Haines
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida 33612, USA
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Pendleton LC, Haines RJ, Corbin KD, Eichler DC. Phosphorylation of argininosuccinate synthase at T131 correlates with changes in NO production. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.763.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Corbin KD, Spencer MD, Costa KA, Sha W, Abdelmalek MF, Pan Y, Suzuki A, Guy CD, Cardona DM, Torquati A, Diehl AM, Zeisel SH. Genotype‐based hierarchical clustering reveals a panel of polymorphisms in one carbon metabolism that are associated with obesity. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.819.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Wei Sha
- Bioinformatics Research CenterUNC CharlotteKannapolisNC
| | | | | | | | | | | | | | | | - Steven H Zeisel
- Nutrition Research InstituteUNC Chapel HillKannapolisNC
- NutritionUNC Chapel HillChapel HillNC
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Abstract
INTRODUCTION The magnitude and duration of the elevation in resting energy expenditure after vigorous exercise have not been measured in a metabolic chamber. This study investigated the effects of inserting a 45-min vigorous cycling bout into the daily schedule versus a controlled resting day on 24-h energy expenditure in a metabolic chamber. METHODS Ten male subjects (age = 22-33 yr) completed two separate 24-h chamber visits (one rest and one exercise day), and energy balance was maintained for each visit condition. On the exercise day, subjects completed 45 min of cycling at 57% Wmax (mean ± SD = 72.8% ± 5.8% VO(2)max) starting at 11:00 a.m. Activities of daily living were tightly controlled to ensure uniformity on both rest and exercise days. The area under the energy expenditure curve for exercise and rest days was calculated using the trapezoid rule in the EXPAND procedure in the SAS and then contrasted. RESULTS The 45-min exercise bout resulted in a net energy expenditure of 519 ± 60.9 kcal (P < 0.001). For 14 h after exercise, energy expenditure was increased 190 ± 71.4 kcal compared with the rest day (P < 0.001). CONCLUSIONS In young male subjects, vigorous exercise for 45 min resulted in a significant elevation in postexercise energy expenditure that persisted for 14 h. The 190 kcal expended after exercise above resting levels represented an additional 37% to the net energy expended during the 45-min cycling bout. The magnitude and duration of increased energy expenditure after a 45-min bout of vigorous exercise may have implications for weight loss and management.
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Affiliation(s)
- Amy M Knab
- Human Performance Laboratory, Appalachian State University, North Carolina Research Campus, Kannapolis, NC 28081, USA
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Haines RJ, Corbin KD, Pendleton LC, Meininger CJ, Eichler DC. Insulin transcriptionally regulates argininosuccinate synthase to maintain vascular endothelial function. Biochem Biophys Res Commun 2012; 421:9-14. [PMID: 22452988 DOI: 10.1016/j.bbrc.2012.03.074] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 03/13/2012] [Indexed: 11/15/2022]
Abstract
Diminished vascular endothelial cell nitric oxide (NO) production is a major factor in the complex pathogenesis of diabetes mellitus. In this report, we demonstrate that insulin not only maintains endothelial NO production through regulation of endothelial nitric oxide synthase (eNOS), but also via the regulation of argininosuccinate synthase (AS), which is the rate-limiting step of the citrulline-NO cycle. Using serum starved, cultured vascular endothelial cells, we show that insulin up-regulates AS and eNOS transcription to support NO production. Moreover, we show that insulin enhances NO production in response to physiological cues such as bradykinin. To translate these results to an in vivo model, we show that AS transcription is diminished in coronary endothelial cells isolated from rats with streptozotocin (STZ)-induced diabetes. Importantly, we demonstrate restoration of AS and eNOS transcription by insulin treatment in STZ-diabetic rats, and show that this restoration was accompanied by improved endothelial function as measured by endothelium-dependent vasorelaxation. Overall, this report demonstrates, both in cell culture and whole animal studies, that insulin maintains vascular function, in part, through the maintenance of AS transcription, thus ensuring an adequate supply of arginine to maintain vascular endothelial response to physiological cues.
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Affiliation(s)
- Ricci J Haines
- Department of Molecular Medicine, University of South Florida, Morsani College of Medicine, Tampa, FL, USA
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Abstract
Advances in nutrigenetics and nutrigenomics have been instrumental in demonstrating that nutrient requirements vary among individuals. This is exemplified by studies of the nutrient choline, in which gender, single-nucleotide polymorphisms, estrogen status, and gut microbiome composition have been shown to influence its optimal intake level. Choline is an essential nutrient with a wide range of biological functions, and current studies are aimed at refining our understanding of its requirements and, importantly, on defining the molecular mechanisms that mediate its effects in instances of suboptimal dietary intake. This chapter introduces the reader to challenges in developing individual nutrition recommendations, the biological function of choline, current and future research paradigms to fully understand the consequences of inadequate choline nutrition, and some forward thinking about the potential for individualized nutrition recommendations to become a tangible application for improved health.
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Affiliation(s)
- Karen D Corbin
- University of North Carolina at Chapel Hill, Nutrition Research Institute, Kannapolis, North Carolina, USA
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Pendleton LC, Thompson RJ, Corbin KD, Meininger CJ, Eichler DC. Insulin Coordinately Regulates Nitric Oxide Synthase and Argininosuccinate Synthase to Maintain Vascular Endothelial Function. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.871.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Karen D Corbin
- Nutrition Research Institute, UNC Chapel HillKannapolisNC
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Corbin KD, Knab AM, Shanely RA, Nieman DC, Zeisel SH. Reproducibility of 24 hour energy expenditure measured by whole‐room indirect calorimetry in lean and obese males. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.554.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Amy M Knab
- Human Performance LaboratoryAppalachian State UniversityKannapolisNC
- Health, Leisure, and Exercise ScienceAppalachian State UniversityBooneNC
| | - R. Andrew Shanely
- Human Performance LaboratoryAppalachian State UniversityKannapolisNC
- Health, Leisure, and Exercise ScienceAppalachian State UniversityBooneNC
| | - David C Nieman
- Human Performance LaboratoryAppalachian State UniversityKannapolisNC
- Health, Leisure, and Exercise ScienceAppalachian State UniversityBooneNC
| | - Steven H Zeisel
- Nutrition Research InstituteUNC Chapel HillKannapolisNC
- NutritionUNC Chapel HillChapel HillNC
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Pendleton LC, Corbin KD, Shriver SK, Solomonson LP, Eichler DC. Characterization of AS Regulatory Protein, a Novel Protein Implicated in Endothelial Stress Response. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.500.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Corbin KD, Pendleton LC, Solomonson LP, Eichler DC. Phosphorylation of argininosuccinate synthase by protein kinase A. Biochem Biophys Res Commun 2008; 377:1042-6. [PMID: 18948083 DOI: 10.1016/j.bbrc.2008.10.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Accepted: 10/09/2008] [Indexed: 10/21/2022]
Abstract
Argininosuccinate synthase (AS) is essential for endothelial nitric oxide (NO) production and its regulation in this capacity has been studied primarily at the transcriptional level. The dynamics of vascular function suggest that an acute regulation system may mediate AS function. This premise underlies our hypothesis that AS is phosphorylated in vascular endothelium. Immunoprecipitation and immobilized metal affinity chromatography demonstrated that AS is an endogenous phosphoprotein. An in vitro kinase screen revealed that protein kinase A (PKA), a kinase that enhances NO production via eNOS activation, phosphorylated AS. Vascular endothelial growth factor (VEGF) was identified as a candidate pathway for regulating AS phosphorylation since it enhanced NO production and activated PKA and eNOS. MDLA, an AS inhibitor, diminished maximal VEGF-mediated NO production. In addition, immunoprecipitation studies suggested that VEGF enhanced AS phosphorylation. Overall, these results represent the first demonstration that vascular endothelial NO production can be regulated by dynamic AS phosphorylation.
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Affiliation(s)
- Karen D Corbin
- Department of Molecular Medicine, College of Medicine, University of South Florida, 12901 Bruce B. Downs Boulevard, MDC Box 7, Tampa, FL 33612, USA
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Goodwin BL, Corbin KD, Pendleton LC, Levy MM, Solomonson LP, Eichler DC. Troglitazone up-regulates vascular endothelial argininosuccinate synthase. Biochem Biophys Res Commun 2008; 370:254-8. [PMID: 18375203 DOI: 10.1016/j.bbrc.2008.03.089] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2008] [Accepted: 03/17/2008] [Indexed: 11/25/2022]
Abstract
Vascular endothelial nitric oxide (NO) production via the citrulline-NO cycle not only involves the regulation of endothelial nitric oxide synthase (eNOS), but also regulation of caveolar-localized endothelial argininosuccinate synthase (AS), which catalyzes the rate-limiting step of the cycle. In the present study, we demonstrated that exposure of endothelial cells to troglitazone coordinately induced AS expression and NO production. Western blot analysis demonstrated an increase in AS protein expression. This increased expression was due to transcriptional upregulation of AS mRNA, as determined by quantitative real time RT-PCR and inhibition by 1-d-ribofuranosylbenzimidazole (DRB), a transcriptional inhibitor. Reporter gene assays and EMSA analyses identified a distal PPARgamma response element (PPRE) (-2471 to -2458) that mediated the troglitazone increase in AS expression. Overall, this study defines a novel molecular mechanism through which a thiazolidinedione (TZD) like troglitazone supports endothelial function via the transcriptional up-regulation of AS expression.
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Affiliation(s)
- Bonnie L Goodwin
- Department of Molecular Medicine, College of Medicine, University of South Florida, 12901 Bruce B. Downs Boulevard, MDC Box 7, Tampa, FL 33612-4799, USA
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Cooper DR, Corbin KD, Watson JE, Hagiwara M, Patel NA, Jiang K. Central role of Akt in regulating Clk/Sty, serine/arginine‐rich (SR) protein phosphorylation and alternative splicing. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a539-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Denise R. Cooper
- Biochemistry and Molecular BiologyUniverstiy of South Florida13000 Bruce B. Downs Blvd., VAR151TampaFL33612
- J.A. Haley Veterans Hospital13000 Bruce B. Downs Blvd.TampaFL33612
| | - Karen D. Corbin
- Biochemistry and Molecular BiologyUniverstiy of South Florida13000 Bruce B. Downs Blvd., VAR151TampaFL33612
| | - James E. Watson
- J.A. Haley Veterans Hospital13000 Bruce B. Downs Blvd.TampaFL33612
| | - Masatoshi Hagiwara
- Functional GenomicsTokyo Medical and Dental University1‐5‐45 Yushima, Bunkyo‐kuTokyo113‐8510Japan
| | - Niketa A. Patel
- Biochemistry and Molecular BiologyUniverstiy of South Florida13000 Bruce B. Downs Blvd., VAR151TampaFL33612
- J.A. Haley Veterans Hospital13000 Bruce B. Downs Blvd.TampaFL33612
| | - Kun Jiang
- Biochemistry and Molecular BiologyUniverstiy of South Florida13000 Bruce B. Downs Blvd., VAR151TampaFL33612
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