1
|
Abiri B, Valizadeh M, Ramezani Ahmadi A, Amini S, Nikoohemmat M, Abbaspour F, Hosseinpanah F. Association of vitamin D levels with anthropometric and adiposity indicators across all age groups: a systematic review of epidemiologic studies. Endocr Connect 2024; 13:e230394. [PMID: 38032745 PMCID: PMC10831555 DOI: 10.1530/ec-23-0394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 11/30/2023] [Indexed: 12/02/2023]
Abstract
Objectives It has not been established whether vitamin D deficiency is associated with anthropometric state; therefore, this systematic review examined the relationship between serum vitamin D levels with anthropometrics and adiposity across different ages. Methods Studies that examined vitamin D deficiency with adiposity measures in different age groups were searched in the PubMed, Scopus, Embase, and Google Scholar databases until November 2023. Two investigators independently reviewed titles and abstracts, examined full-text articles, extracted data, and rated the quality in accordance with the Newcastle-Ottawa criteria. Results Seventy-two studies, with a total of 59,430 subjects, were included. Of these studies, 27 cross-sectional studies and one longitudinal study (with 25,615 participants) evaluated the possible link between 25(OH)D serum concentrations and anthropometric/adiposity indices in the pediatric population. Forty-two cross-sectional studies and two cohort investigations (with 33,815 participants) investigated the relationship between serum 25(OH)D levels and adiposity measures in adults and/or the elderly population. There is evidence supporting links between vitamin D deficiency and obesity, and revealed an inverse association between vitamin D and adiposity indicators, specifically in female subjects. However, the effects of several confounding factors should also be considered. Conclusion Most published studies, most of which were cross-sectional, reported a negative association between vitamin D and female adiposity indicators. Therefore, serum vitamin D levels should be monitored in overweight/obese individuals.
Collapse
Affiliation(s)
- Behnaz Abiri
- Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Majid Valizadeh
- Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Shirin Amini
- Department of Nutrition, Shoushtar Faculty of Medical Sciences, Shoushtar, Iran
| | - Mohammad Nikoohemmat
- Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Faeze Abbaspour
- Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farhad Hosseinpanah
- Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
2
|
Associations of Serum Total 25OHD, 25OHD3, and epi-25OHD3 with Insulin Resistance: Cross-Sectional Analysis of the National Health and Nutrition Examination Survey, 2011–2016. Nutrients 2022; 14:nu14173526. [PMID: 36079784 PMCID: PMC9459885 DOI: 10.3390/nu14173526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/23/2022] [Accepted: 08/23/2022] [Indexed: 11/29/2022] Open
Abstract
Background: Vitamin D may have a role in insulin sensitivity. However, the data on the association between various metabolites of Vitamin D and insulin-related parameters have been limited. Methods: We identified 6026 adults aged 20–80 years who participated in the 2011–2016 National Health and Nutrition Examination Survey (NHANES). Serum total 25OHD, 25OHD3, and epi-25OHD3, fasting glucose, insulin, and HOMA2-IR were obtained from the NHANES data. The association between serum Vitamin D-related values and insulin resistance was analyzed using a generalized linear model. For risk analysis, multifactorial logistic regression was used. Results: The median total 25-hydroxyvitamin D level, 25-hydroxyvitamin D3 level, and 3-epi-25-hydroxyvitamin D3 level were 62.5 nmol/L, 58.8 nmol/L, and 3.3 nmol/L, respectively. After adjustment for sex, age, race, ethnicity, and education status, the ORs for the insulin resistance of participants of total 25-hydroxyvitamin D, 25-hydroxyvitamin D3, and 3-epi-25-hydroxyvitamin D3 were 0.32 (95% CI 0.24, 0.43), 0.34 (95% CI 0.26, 0.44), and 0.64 (95% CI 0.53, 0.77), respectively. After an adjustment for body mass index, diabetes, and drinking and smoking, the ORs for the insulin resistance of the participants for total 25-hydroxyvitamin D, 25-hydroxyvitamin D3, and 3-epi-25-hydroxyvitamin D3 were 0.56 (95% CI 0.40, 0.78), 0.63 (95% CI 0.46, 0.85), and 0.99 (95% CI 0.80, 1.24), respectively. Conclusions: Our study provides suggestive evidence for the association between Vitamin D concentrations and a lower risk of insulin resistance. Evidence from larger and more adequately powered cohort studies is needed to confirm our results.
Collapse
|
3
|
Cătoi AF, Iancu M, Pârvu AE, Cecan AD, Bidian C, Chera EI, Pop ID, Macri AM. Relationship between 25 Hydroxyvitamin D, Overweight/Obesity Status, Pro-Inflammatory and Oxidative Stress Markers in Patients with Type 2 Diabetes: A Simplified Empirical Path Model. Nutrients 2021; 13:nu13082889. [PMID: 34445049 PMCID: PMC8399080 DOI: 10.3390/nu13082889] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/15/2021] [Accepted: 08/19/2021] [Indexed: 12/22/2022] Open
Abstract
Vitamin D deficiency is highly prevalent in patients with overweight/obesity and type 2 diabetes (T2DM). Herein, we investigated the relationship between vitamin D status and overweight/obesity status, insulin resistance (IR), systemic inflammation as well as oxidative stress (OS). Anthropometric and laboratory assessments of 25-hydroxyvitamin D (25(OH)D) and glycemic, pro-inflammatory and OS biomarkers were performed in a sample of 47 patients with T2DM who were divided into categories based on overweight and degree of obesity. The main findings were: the overweight/obesity status correlated negatively with the degree of serum 25(OH)D deficiency (ρ = −0.27) with a trend towards statistical significance (p = 0.069); the homeostasis model assessment of insulin resistance (HOMA-IR) was significantly different (p = 0.024) in patients with 25(OH)D deficiency, as was total oxidant status (TOS) and oxidative stress index (OSI) in patients with severe serum 25(OH)D deficiency as compared to those with 25(OH)D over 20 ng/mL (TOS: p = 0.007, OSI: p = 0.008); and 25(OH)D had a negative indirect effect on TOS by body mass index (BMI), but BMI was not a significant mediator of the studied relationship. In a setting of overweight and increasing degree of obesity, patients with T2DM did not display decreasing values of 25(OH)D. Subjects with the lowest values of 25(OH)D presented the highest values of BMI. Patients with 25(OH)D deficiency were more insulin resistant and showed increased OS but no elevated systemic inflammation. The negative effect of 25(OH)D on TOS did not seem to involve BMI as a mediator.
Collapse
Affiliation(s)
- Adriana Florinela Cătoi
- Department of Pathophysiology, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania or (A.F.C.); (A.E.P.); (A.D.C.); (E.I.C.)
| | - Mihaela Iancu
- Department of Medical Informatics and Biostatistics, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
- Correspondence:
| | - Alina Elena Pârvu
- Department of Pathophysiology, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania or (A.F.C.); (A.E.P.); (A.D.C.); (E.I.C.)
| | - Andra Diana Cecan
- Department of Pathophysiology, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania or (A.F.C.); (A.E.P.); (A.D.C.); (E.I.C.)
| | - Cristina Bidian
- Department of Physiology, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania;
| | - Elisabeta Ioana Chera
- Department of Pathophysiology, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania or (A.F.C.); (A.E.P.); (A.D.C.); (E.I.C.)
| | - Ioana Delia Pop
- Department of Exact Sciences, Faculty of Horticulture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania;
| | - Adrian Maximilian Macri
- Department of Animal production and Food Safety, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania;
| |
Collapse
|
4
|
Vigna L, Lonati C, Tirelli AS, Napolitano F, Turolo S, Ingenito MR, Tomaino L, Rossi P, Riboldi L. Effects of Vitamin D Supplefmentation on Outcome of Low-Calorie Diet in Workers Presenting Obesity or Overweight: A Retrospective Observational Study. J Am Coll Nutr 2021; 41:343-351. [PMID: 34125662 DOI: 10.1080/07315724.2021.1902879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AIM Growing evidence underscores the inverse association between serum vitamin D (vit D) and chronic conditions such as metabolic syndrome, diabetes and obesity. The aim of this retrospective study was to compare weight loss and metabolic serum biomarkers in subjects on low-calorie diet receiving vit D supplementation versus those not receiving it. METHODS The study considered 405 indoor sedentary workers with overweight/obesity and vit D insufficiency, who participated to a health fitness program between 2011-2013. Participants were recommended a moderately-low calorie diet plus vit D supplementation with 150,000 or 900,000 IU cumulative over 6 months in case of hypovitaminosis D (according to the guidelines at the enrollment), while those with optimal levels were recommended only diet. Participants were evaluated at baseline (T0), and after 6 months (T1). Anthropometric parameters, BMI, waist circumference (WC), serum 25-hydroxyvitamin D concentration ([25(OH)D]) and glycated hemoglobin (HbA1c) were assessed at T0 and T1. RESULTS Participants fell into one of three groups: (A) not supplemented, (B) receiving 150,000 IU and (C) receiving 900,000 IU cumulative over 6 months. Overall, the supplementation was associated with increased [25(OH)D], but only the dosage of group C was associated with the achievement of optimal vit D status. A significantly greater weight decrease was observed in group B (-4.1 kg) and C (-4.5 kg) compared to untreated (-1.2 kg). WC reduction was higher in the vit D groups (group B: -3.95 cm; group C; -6.20 cm; untreated: -3.21 cm; p < 0.05). When setting the threshold for obesity at BMI > 30kg/m2, [25(OH)D] no longer correlated with body fat or weight. [25(OH)D] inversely correlated with the Homeostatic Model Assessment for Insulin Resistance and remained significant after adjustment for BMI. CONCLUSIONS Higher [25(OH)D] levels were associated to a greater weight loss and enhanced the beneficial effects of a reduced-calorie diet in individuals with BMI > 30 kg/m2.
Collapse
Affiliation(s)
- Luisella Vigna
- Department of Preventive Medicine, Occupational Health Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Caterina Lonati
- Center for Preclinical Research, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | - Amedea Silvia Tirelli
- Laboratory of Clinical Chemistry and Microbiology, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Filomena Napolitano
- Department of Clinical and Community Sciences (DISCCO), Università degli Studi di Milano, Milan, Italy
| | - Stefano Turolo
- UOC Nephrology Dialysis and Pediatric Transplantation, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | - Maria Rosaria Ingenito
- Department of Preventive Medicine, Occupational Health Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Laura Tomaino
- Department of Clinical and Community Sciences (DISCCO), Università degli Studi di Milano, Milan, Italy
| | - Paola Rossi
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - Luciano Riboldi
- Department of Preventive Medicine, Occupational Health Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| |
Collapse
|
5
|
Rafiq S, Jeppesen PB. Insulin Resistance Is Inversely Associated with the Status of Vitamin D in Both Diabetic and Non-Diabetic Populations. Nutrients 2021; 13:1742. [PMID: 34063822 PMCID: PMC8224049 DOI: 10.3390/nu13061742] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/11/2021] [Accepted: 05/17/2021] [Indexed: 02/06/2023] Open
Abstract
Vitamin D has been implicated in the regulation of glucose metabolism and insulin resistance. We designed this study to provide evidence that insulin resistance is dependent on the concentration of vitamin D in the body. Forty observational studies of both type 2 diabetes mellitus patients and healthy subjects were included in this meta-analysis. Related articles were searched from Embase, PubMed, and Medline through January 2021. Filters for search were used to obtain more focused results. We used Comprehensive Meta-Analysis Version 3 for the construction of forest plots. RevMan software version 5.3 was used to build the risk of bias tables and summary plots. The observational studies included in this systematic review and meta-analysis showed an inverse relationship of insulin resistance with the status of vitamin D both in non-diabetic (r = -0.188; 95% CI = -0.141 to -0.234; p = 0.000) and diabetic (r = -0.255; 95% CI = -0.392 to -0.107, p = 0.001) populations. From the meta-analysis we concluded that hypovitaminosis D is related to increased levels of insulin resistance in both type 2 diabetes patients and the healthy population all over the world.
Collapse
Affiliation(s)
- Shamaila Rafiq
- Department of Clinical Medicine, Aarhus University, Aarhus N, 8200 Aarhus, Denmark;
| | | |
Collapse
|
6
|
Karuppusami R, Antonisami B, Vasan SK, Gowri M, Selliah HY, Arulappan G, Jebasingh F, Thomas N, Paul TV. Association of serum 25-Hydroxy vitamin D with total and regional adiposity and cardiometabolic traits. PLoS One 2020; 15:e0243850. [PMID: 33370344 PMCID: PMC7769464 DOI: 10.1371/journal.pone.0243850] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/27/2020] [Indexed: 12/12/2022] Open
Abstract
Background Lower serum 25-hydroxyvitamin D [25(OH)D] is associated with greater adiposity and adverse cardiometabolic risk profile. The evidence is inconsistent among South Asian Indians. We aimed to examine associations between 25(OH)D and cardiovascular (CVD) risk markers in a rural and urban cohort from South India. Subjects/Methods In this cross sectional study, 373 individuals (men, n = 205) underwent detailed CVD risk marker assessment including anthropometry [body mass index (BMI), waist, (WC) and hip circumferences (HC)], body composition analysis using dual energy x-ray absorptiometry (DXA), blood pressure and biochemical analysis (glucose, insulin and lipids). The distribution of CVD risk factors were compared across serum 25(OH)D levels, stratified as deficiency (<20 ng/ml), insufficiency (20 to 29 ng/ml) and normal (≥30 ng/ml) levels. Multiple regression analysis, adjusting for potential confounders, was used to study associations of 25(OH)D with adiposity and cardiometabolic traits. Results The mean and standard deviation (SD) of age, BMI and 25(OH)D levels were 41.4 (1.1) years, 25.5 (4.8) kg/m2 and 23.4 (10.4) ng/ml respectively. The prevalence of 25(OH)D deficiency was 39.9% in this cohort. Individuals in the 25(OH)D deficiency category had significantly higher mean (SD) BMI [26.6 (5.1) kg/m2], waist circumference [89.9 (12.5) cm] and total fat mass [20.6 (7.9) kg] compared with the Vitamin D sufficient group [BMI: 24.0 (4.4); WC 84.7 (12.0); total fat mass: 15.2 (6.8)]. Significantly inverse associations were observed with DXA measured total and regional fat depots with 25(OH)D levels, while anthropometric indices of adiposity showed significant inverse association only in women. After adjusting for total fat mass, no significant associations were observed between 25(OH)D and the cardiometabolic traits. Conclusions Our results confirm that lower 25(OH)D is independently associated with both total and regional adiposity, but not with cardiometabolic traits, in this population.
Collapse
Affiliation(s)
- Reka Karuppusami
- Department of Biostatistics, Christian Medical College, Vellore, India
| | | | - Senthil K. Vasan
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Churchill Hospital, University of Oxford, Oxford, United Kingdom
| | - Mahasampath Gowri
- Department of Biostatistics, Christian Medical College, Vellore, India
| | - Hepsy Y. Selliah
- Department of Biostatistics, Christian Medical College, Vellore, India
| | | | - Felix Jebasingh
- Department of Endocrinology, Diabetes and Metabolism, Christian Medical College, Vellore, India
| | - Nihal Thomas
- Department of Endocrinology, Diabetes and Metabolism, Christian Medical College, Vellore, India
| | - Thomas V. Paul
- Department of Endocrinology, Diabetes and Metabolism, Christian Medical College, Vellore, India
- * E-mail:
| |
Collapse
|
7
|
Yin TT, Bi Y, Li P, Shen SM, Wang WM, Jiang C, Gao CX, Wang Y, Gao LJ, Zhu DL, Feng WH. Effects of exenatide versus insulin glargine on body composition in overweight and obese T2DM patients: a randomized controlled trial. Nutr Metab (Lond) 2018; 15:67. [PMID: 30302121 PMCID: PMC6167818 DOI: 10.1186/s12986-018-0295-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/27/2018] [Indexed: 12/13/2022] Open
Abstract
Background Weight loss, especially fat mass reduction, helps to improve blood glucose control, insulin sensitivity, and β-cell function. This study aimed to compare the effect of exenatide and glargine on body composition in overweight and obese patients with type 2 diabetes (T2DM) who do not achieve adequate glycemic control with metformin. Methods We performed a prospective, randomized study of 37 overweight or obese patients with T2DM who had inadequate glycemic control with metformin. The patients were treated with either exenatide or glargine for 16 weeks. Dual-energy X-ray absorptiometry was used to assess body composition. Results Post-intervention weight, body mass index (BMI), waist circumference, body mass, and fat mass were lower in patients treated with exenatide, while weight and BMI significantly increased with glargine. Reductions in weight, BMI, body fat mass, and percent fat mass (except for gynoid) were greater with exenatide than with glargine, and percent lean tissue (other than the limbs) increased with exenatide. In all body regions except for the limbs, fat mass decreased with exenatide to a greater extent than lean tissue. Glucose control, insulin resistance, and β-cell function were not different between the treatment groups. Conclusions For overweight and obese patients whose T2DM was inadequately controlled with metformin, exenatide and glargine achieved similar improvements in glycemic control, insulin sensitivity, and β-cell function.However, exenatide produced better weight and fat mass reduction, which were beneficial for blood glucose control. Our findings may guide the selection of appropriate drugs for glycemic and weight control. Trial registration NCT02325960, registered 25 December 2014.
Collapse
Affiliation(s)
- Ting-Ting Yin
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China.,2Department of Endocrinology, Drum Tower Clinical Hospital, Medical School of Southeast University, Zhongshan Road 321, Nanjing, 210008 China
| | - Yan Bi
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Ping Li
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Shan-Mei Shen
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Wei-Min Wang
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Can Jiang
- Department of Endocrinology, Jining No1. People's Hospital, Shandong, China
| | - Cai-Xia Gao
- Department of Traditional Chinese Medicine, Yan'an People's Hospital, Yan'an, China
| | - Yan Wang
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Li-Jun Gao
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China.,2Department of Endocrinology, Drum Tower Clinical Hospital, Medical School of Southeast University, Zhongshan Road 321, Nanjing, 210008 China
| | - Da-Long Zhu
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Wen-Huan Feng
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China.,2Department of Endocrinology, Drum Tower Clinical Hospital, Medical School of Southeast University, Zhongshan Road 321, Nanjing, 210008 China
| |
Collapse
|
8
|
Zhu W, Heil DP. Associations of vitamin D status with markers of metabolic health: A community-based study in Shanghai, China. Diabetes Metab Syndr 2018; 12:727-732. [PMID: 29699952 DOI: 10.1016/j.dsx.2018.04.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 04/09/2018] [Indexed: 12/23/2022]
Abstract
AIMS This study investigated the associations of vitamin D status (i.e., serum 25(OH)D concentration) with markers of metabolic health and metabolic syndrome (MS), as well as possible gender differences in these associations, with metabolic syndrome (MS) for a sample from Shanghai, China. METHODS Demographic and anthropometric data, as well as 25-hydroxyvitamin D (serum 25(OH)D), blood glucose, and lipid concentrations were obtained for 508 urban residents aged 19-70 years. After grouping into tertiles according to their serum 25(OH)D concentrations, linear and logistic regressions were used to evaluate associations between serum 25(OH)D concentration and risk factors for MS across tertiles. RESULTS A 1 ng/mL increase in 25(OH)D was associated with a significant decrease in total cholesterol by 0.25 mmol/L [95% CI: (-0.44, -0.05); P = 0.014] for the third tertile, with reference to the first tertile. Also, 1 ng/mL increase in 25(OH)D was associated with a significant decrease in LDL by 0.18 mmol/L [95% CI: (-0.35, -0.02); P = 0.026] for the third tertile. In addition, participants in the third tertile had a 54% reduction in the OR for MS [95% CI: (-1.10,- 0.02), P = 0.041]. Lastly, while there was no gender difference in vitamin D deficiency status, the non-MS women had significantly higher 25(OH)D level than those with MS (30.1 ± 5.8 vs. 28.5 ± 5.9 ng/mL, P = 0.035), while no such difference was observed for men. CONCLUSIONS Higher serum 25(OH)D concentration was associated with a better metabolic profile and thus a lower risk for developing MS in urban Shanghai residents of China.
Collapse
Affiliation(s)
- Wei Zhu
- Department of Health and Human Development, Montana State University, Bozeman, MT, 59717, USA; Department of Nutrition, Shanghai Institute of Health Sciences, Shanghai, 201318, China
| | - Daniel P Heil
- Department of Health and Human Development, Montana State University, Bozeman, MT, 59717, USA.
| |
Collapse
|
9
|
Rafiq S, Jeppesen PB. Body Mass Index, Vitamin D, and Type 2 Diabetes: A Systematic Review and Meta-Analysis. Nutrients 2018; 10:nu10091182. [PMID: 30154381 PMCID: PMC6164132 DOI: 10.3390/nu10091182] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 08/22/2018] [Accepted: 08/24/2018] [Indexed: 02/06/2023] Open
Abstract
The deficiency of vitamin D is prevalent all over the world. Studies have shown that vitamin D may play an important role in the development of obesity. The current study was conducted to quantitatively evaluate the association between serum 25-(OH) vitamin D levels and the risk of obesity in both diabetic and non-diabetic subjects. A systematic review and meta-analysis of observational studies was carried out for that purpose. We searched the Medline, PubMed, and Embase databases throughout all of March 2018. A total of fifty five observational studies for both diabetic and non-diabetic subjects were finally included in the meta-analysis. The data were analyzed by comprehensive meta-analysis software version 3 and the random effects model was used to analyze the data. The meta-analysis showed an overall inverse relationship between serum vitamin D status and body mass index (BMI) in studies of both diabetic (r = −0.173, 95% = −0.241 to −0.103, p = 0.000) and non-diabetic (r = −0.152, 95% = −0.187 to −0.116, p = 0.000) subjects. The evidence of publication bias was not found in this meta-analysis. In conclusion, the deficiency of vitamin D is associated with an increased level of BMI in the studies of both diabetic and non-diabetic subjects. Reliable evidence from well-designed future randomized controlled trials is required to confirm the findings from observational studies and to find out the potential regulatory effects of vitamin D supplementation to lower BMI.
Collapse
Affiliation(s)
- Shamaila Rafiq
- Department of Clinical Medicine Aarhus University, 8200 Aarhus, Denmark.
| | | |
Collapse
|
10
|
Hyppönen E, Boucher BJ. Adiposity, vitamin D requirements, and clinical implications for obesity-related metabolic abnormalities. Nutr Rev 2018; 76:678-692. [DOI: 10.1093/nutrit/nuy034] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Elina Hyppönen
- Australian Centre for Population Health Research, Sansom Institute for Health Research, University of South Australia, South Australian Health & Medical Research Institute, Adelaide, Australia
| | - Barbara J Boucher
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| |
Collapse
|
11
|
Nikolova M, Boyanov M, Tsakova A. CORRELATIONS OF SERUM VITAMIN D WITH METABOLIC PARAMETERS IN ADULT OUTPATIENTS WITH DIFFERENT DEGREES OF OVERWEIGHT / OBESITY COMING FROM AN URBAN COMMUNITY. ACTA ENDOCRINOLOGICA (BUCHAREST, ROMANIA : 2005) 2018; 14:375-383. [PMID: 31149286 PMCID: PMC6525776 DOI: 10.4183/aeb.2018.375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To describe the correlations between serum 25(OH) vitamin D and anthropometric and metabolic parameters in adult outpatients of both sexes with different BMI coming from an urban community. SUBJECTS AND METHODS 264 subjects referred for obesity assessment participated - 109 men and 155 women (20-60 years). Body weight and height, waist circumference (WC), blood pressure were recorded. Body composition was assessed by bioelectrical impedance (BIA) on a Tanita BC 420 MA analyzer (Tanita Inc., Japan). Serum 25(OH)D Total, Insulin, High-sensitivity C-reactive protein, blood glucose, total, HDL-cholesterol and triglycerides were measured. The insulin resistance index was calculated (HOMA-IR). Participants with BMI>25.0 kg/m2 underwent standard 75 g OGTT. Statistical analysis was performed on an IBM SPSS Statistics 19.0 for Windows platform (Chicago, IL). RESULTS Normal weight was found in 27.2 % of the participants, 24.6 % had overweight, 29.2 % -class I obesity, and 18.9 % - class II or III. Vitamin D was weakly and inversely correlated to different variables in the whole group - such as weight, WC, WC/Height, % body fat and HOMA-IR index (r=-0.231, -0.283, -0.307, -0.339, -0.328 respectively, all p<0.001). Building subgroups based on BMI led to loss of significance. Backward analysis revealed Total-C/LDL-C ratio, and LDL-C/HDL-C ratio as strongest predictors of serum vitamin D (p=0.001; R2=0.204). CONCLUSION The association of vitamin D with blood pressure, plasma lipids, glucose and insulin is very weak on an individual level. However, several obesity indices (WC, WC/height ratio, % Body fat from BIA) might be used as a screening tool for subjects at risk for vitamin D deficiency.
Collapse
Affiliation(s)
- M.G. Nikolova
- Sofia Medicine University, Faculty of Medicine, Department of Hygiene, Medical Ecology and Nutrition, Sofia, Bulgaria
| | - M.A. Boyanov
- Sofia Medicine University, Faculty of Medicine, Department of Internal Medicine, Sofia, Bulgaria
- Sofia Medicine University, Faculty of Medicine, Clinic of Endocrinology and Metabolism, Sofia, Bulgaria
| | - A.D. Tsakova
- Sofia Medicine University, Faculty of Medicine, Department of Clinical Laboratory and Clinical Immunology, “Aleksandrovska” University Hospital, Sofia, Bulgaria
- Sofia Medicine University, Faculty of Medicine, Central Clinical Laboratory, Sofia, Bulgaria
| |
Collapse
|
12
|
Li J, Mihalcioiu M, Li L, Zakikhani M, Camirand A, Kremer R. Vitamin D prevents lipid accumulation in murine muscle through regulation of PPARγ and perilipin-2 expression. J Steroid Biochem Mol Biol 2018; 177:116-124. [PMID: 29037825 DOI: 10.1016/j.jsbmb.2017.10.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 10/01/2017] [Accepted: 10/10/2017] [Indexed: 02/06/2023]
Abstract
Vitamin D plays an important role in regulation of skeletal muscle tone and contraction. Serum vitamin D status is linked to muscle power and force in adolescent girls, and vitamin D deficiency is associated with myopathies in children and poorer physical performance in the elderly. We previously reported that vitamin D deficiency is linked to a significant increase in muscle fatty infiltration in healthy young women, and studies in patients with neuromuscular disorders also associate muscle weakening and lipid content. In order to better understand the link between vitamin D status and skeletal muscle lipid metabolism, we compared the effect of a low (25IU/kg) or normal (1000IU/kg) vitamin D3 diet on muscle fat in female FVB mice maintained in a room without UVB lighting to minimize endogenous vitamin D production. Animals on low vitamin D diet displayed lower circulating 25(OH)D levels and a dramatic increase (287±52% compared to normal diet, p<0.0001) in lipid deposition in skeletal muscle accompanied by muscle fiber disorganization. Lipid droplet staining increased by 242±23% (p<0.0001) in low vitamin D diet, and lipid droplet coat protein perilipin-2 and nuclear receptor transcription factor PPARγ expression levels were increased compared to mice fed the normal vitamin D diet: average staining for PLIN2: 0.22±0.08 (25IU/kg diet) vs 0.10±0.02 (1000IU/kg). Average staining for PPARγ: 0.24±0.06 (25IU/kg diet) vs 0.07±0.04 (1000IU/kg) p<0.0001. Tissue mass spectrometry imaging revealed major differences in muscle phospholipids profile depending on diet. In vitro, 1,25(OH)2D3 treatment of 3T3-L1 pre-adipocytes inhibited appearance of lipid droplets by 79±9.3%, and caused a 80±10% and 25±8% (p=0.001) reduction in PPARγ and perilipin-2 mRNA levels (by qPCR) compared to control cells. In summary, we report here the first in vivo model illustrating the important structural muscle fiber disorganization and fat accumulation inside and outside muscle fibers that accompany vitamin D deficiency. Furthermore, we show that the underlying mechanisms involve PPARγ and perilipin-2.
Collapse
Affiliation(s)
- Jiarong Li
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Milton Mihalcioiu
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Lifeng Li
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Mahvash Zakikhani
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Anne Camirand
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| | - Richard Kremer
- Research Institute of McGill University Health Centre, Montréal, QC, H4A 3J1, Canada.
| |
Collapse
|
13
|
Suryanarayana P, Arlappa N, Sai Santhosh V, Balakrishna N, Lakshmi Rajkumar P, Prasad U, Raju BB, Shivakeseva K, Divya Shoshanni K, Seshacharyulu M, Geddam JB, Prasanthi PS, Ananthan R. Prevalence of vitamin D deficiency and its associated factors among the urban elderly population in Hyderabad metropolitan city, South India. Ann Hum Biol 2018; 45:133-139. [PMID: 29307228 DOI: 10.1080/03014460.2018.1425479] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Deficiency of vitamin D has been associated with various health conditions. However, vitamin D deficiency (VDD) and factors associated with VDD are not well studied, especially among the urban elderly population of India. AIM To assess the prevalence of VDD and its associated factors among the urban free-living elderly population in Hyderabad. SUBJECTS AND METHODS A community-based cross-sectional study was conducted among 298 urban elderly (≥60 years) by adapting a random sampling procedure. Demographic particulars were collected. Blood pressure and anthropometric measurements were recorded using standard equipment. Fasting glucose, lipid profile and 25-hydroxy vitamin D [25(OH) D] were estimated in plasma samples. RESULTS The mean ± SE plasma vitamin D and the prevalence of VDD among the urban elderly population were 19.3 ± 0.54 (ng/ml) and 56.3%, respectively. The prevalence of VDD was significantly associated with education, high body mass index (BMI), hypertension (HT) and metabolic syndrome (MS). Multiple logistic regression analysis revealed HT as a significant predictor of vitamin D deficiency and the risk of VDD was double among the elderly with hypertension. CONCLUSIONS The prevalence of VDD was high among the urban elderly population in the south Indian city of Hyderabad. High BMI, MS, HT and education are significant associated factors of VDD.
Collapse
Affiliation(s)
- Palla Suryanarayana
- a Lipid Chemistry Division , National Institute of Nutrition , Hyderabad , India
| | | | | | - Nagalla Balakrishna
- c Statistical Division , National Institute of Nutrition , Hyderabad , India
| | | | | | | | - Kommula Shivakeseva
- a Lipid Chemistry Division , National Institute of Nutrition , Hyderabad , India
| | | | | | | | | | - Rajendran Ananthan
- e Food Chemistry Division , National Institute of Nutrition , Hyderabad , India
| |
Collapse
|
14
|
Han B, Li Q, Wang N, Chen Y, Zhu C, Chen Y, Xia F, Cang Z, Lu M, Meng Y, Chen C, Lu Y. Sexual Dimorphism for the Association between Vitamin D and Insulin Resistance in Chinese People. Int J Endocrinol 2018; 2018:1216370. [PMID: 29692809 PMCID: PMC5859859 DOI: 10.1155/2018/1216370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 09/26/2017] [Accepted: 12/10/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The relationship between vitamin D and insulin resistance is still controversial. Many factors could influence this relationship. In addition, this relationship in different genders was still unclear. METHODS A total of 6597 subjects, including 2813 males and 3784 females, were analyzed. The serum levels of 25(OH)D, fasting blood glucose (FBG), fasting insulin, HbA1c, and other metabolic parameters were tested. The waist circumference (WC), weight, and height were also measured. Questionnaires regarding smoking and drinking were collected from these subjects. RESULTS Serum 25(OH)D was categorized into quartiles. Increasing 25(OH)D levels were associated with reduced trend of homeostasis model assessment of insulin resistance (HOMA-IR) in both males and females. Pearson's correlation indicated 25(OH)D level was inversely associated with the HOMA-IR for male subjects (r = -0.055, P = 0.028) but not for female subjects (r = -0.005, P = 0.798). Age, triglyceride (TG), and low-density lipoprotein (LDL) were associated with the vitamin D levels in males and females. In regression analysis, serum 25(OH)D concentration was significantly associated with HOMA-IR only in overweight males. CONCLUSION We found an inverse association between 25(OH)D and HOMA-IR in Chinese overweight males. Vitamin D supplementation might be beneficial in this population. However, further clinical trials are needed to confirm this association.
Collapse
Affiliation(s)
- Bing Han
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Qin Li
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ningjian Wang
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yi Chen
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Chunfang Zhu
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yingchao Chen
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Fangzhen Xia
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Zhen Cang
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Meng Lu
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ying Meng
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Chi Chen
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yingli Lu
- Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| |
Collapse
|
15
|
Poddar M, Chetty Y, Chetty VT. How does obesity affect the endocrine system? A narrative review. Clin Obes 2017; 7:136-144. [PMID: 28294570 DOI: 10.1111/cob.12184] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 11/29/2016] [Accepted: 12/08/2016] [Indexed: 01/18/2023]
Abstract
Obesity is a chronic, relapsing medical condition that results from an imbalance of energy expenditure and consumption. It is a leading cause of preventable illness, disability and premature death. The causes of obesity are multifactorial and include behavioural, socioeconomic, genetic, environmental and psychosocial factors. Rarely are endocrine diseases, e.g., hypothyroidism or Cushing's syndrome, the cause of obesity. What is less understood is how obesity affects the endocrine system. In this review, we will discuss the impact of obesity on multiple endocrine systems, including the hypothalamic-pituitary axis, changes in vitamin D homeostasis, gender steroids and thyroid hormones. We will also examine the renin angiotensin aldosterone system and insulin pathophysiology associated with obesity. We will provide a general overview of the biochemical changes that can be seen in patients with obesity, review possible aetiologies of these changes and briefly consider current guidelines on their management. This review will not discuss endocrine causes of obesity.
Collapse
Affiliation(s)
- M Poddar
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Y Chetty
- University of Queensland, Brisbane, QLD, Australia
| | - V T Chetty
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| |
Collapse
|
16
|
Garbossa SG, Folli F. Vitamin D, sub-inflammation and insulin resistance. A window on a potential role for the interaction between bone and glucose metabolism. Rev Endocr Metab Disord 2017; 18:243-258. [PMID: 28409320 DOI: 10.1007/s11154-017-9423-2] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Vitamin D is a key hormone involved in the regulation of calcium/phosphorous balance and recently it has been implicated in the pathogenesis of sub-inflammation, insulin resistance and obesity. The two main forms of vitamin D are cholecalciferol (Vitamin D3) and ergocalciferol (Vitamin D2): the active form (1,25-dihydroxyvitamin D) is the result of two hydroxylations that take place in liver, kidney, pancreas and immune cells. Vitamin D increases the production of some anti-inflammatory cytokines and reduces the release of some pro-inflammatory cytokines. Low levels of Vitamin D are also associated with an up-regulation of TLRs expression and a pro-inflammatory state. Regardless of the effect on inflammation, Vitamin D seems to directly increase insulin sensitivity and secretion, through different mechanisms. Considering the importance of low grade chronic inflammation in metabolic syndrome, obesity and diabetes, many authors hypothesized the involvement of this nutrient/hormone in the pathogenesis of these diseases. Vitamin D status could alter the balance between pro and anti-inflammatory cytokines and thus affect insulin action, lipid metabolism and adipose tissue function and structure. Numerous studies have shown that Vitamin D concentrations are inversely associated with pro-inflammatory markers, insulin resistance, glucose intolerance and obesity. Interestingly, some longitudinal trials suggested also an inverse association between vitamin D status and incident type 2 diabetes mellitus. However, vitamin D supplementation in humans showed controversial effects: with some studies demonstrating improvements in insulin sensitivity, glucose and lipid metabolism while others showing no beneficial effect on glycemic control and on inflammation. In conclusion, although the evidences of a significant role of Vitamin D on inflammation, insulin resistance and insulin secretion in the pathogenesis of obesity, metabolic syndrome and type 2 diabetes, its potential function in treatment and prevention of type 2 diabetes mellitus is unclear. Encouraging results have emerged from Vitamin D supplementation trials on patients at risk of developing diabetes and further studies are needed to fully explore and understand its clinical applications.
Collapse
Affiliation(s)
- Stefania Giuliana Garbossa
- Department of Internal Medicine, Azienda Socio Sanitaria Territoriale Santi Paolo e Carlo, Ospedale San Paolo, Via A. Di Rudini 8, Milan, 20142, Italy
- Program in Nutritional Science, Universitá degli Studi di Milano, Milan, Italy
| | - Franco Folli
- Department of Internal Medicine, Azienda Socio Sanitaria Territoriale Santi Paolo e Carlo, Ospedale San Paolo, Via A. Di Rudini 8, Milan, 20142, Italy.
- Endocrinology and Metabolism, Department of Health Science, Universitá degli Studi di Milano, San Paolo Hospital, Room #737, Via A. Di Rudiní 8, 20142, Milan, Italy.
- Department of Medicine, Diabetes Division, University of Texas Health System, 7703 Floyd Curl Drive, San Antonio, 78229, TX, USA.
| |
Collapse
|
17
|
Jackson JL, Judd SE, Panwar B, Howard VJ, Wadley VG, Jenny NS, Gutiérrez OM. Associations of 25-hydroxyvitamin D with markers of inflammation, insulin resistance and obesity in black and white community-dwelling adults. JOURNAL OF CLINICAL AND TRANSLATIONAL ENDOCRINOLOGY 2016; 5:21-25. [PMID: 27833859 PMCID: PMC5098550 DOI: 10.1016/j.jcte.2016.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
AIMS Vitamin D is a fat-soluble vitamin classically known for its role in calcium absorption and bone health. Growing evidence indicates that vitamin D deficiency may be associated with inflammation, insulin resistance, and obesity. However, prior studies examining the association of vitamin D with metabolic risk factors had relatively low representation of individuals of black race, limiting their ability to characterize associations of vitamin D and parameters of metabolic health in black vs. white individuals. METHODS We examined associations of 25-hydroxyvitamin D (25(OH)D) concentrations with markers of inflammation (interleukin [IL]-6, IL-10, high sensitivity C-reactive protein [hsCRP]), insulin sensitivity (adiponectin, resistin, HOMA-IR), and obesity (body mass index [BMI], waist circumference) in 1,042 participants from the Reasons for Geographic and Racial Differences in Stroke (REGARDS) study, a large national cohort of black and white adults 45 years or older. RESULTS In unadjusted analyses, lower 25(OH)D concentrations were associated with higher IL-6 and hsCRP concentrations; lower adiponectin concentrations; higher HOMA-IR; and higher BMI and waist circumference (P<0.05 for all). After adjustment for sociodemographic, clinical, lifestyle, and laboratory variables, lower 25(OH) D concentrations remained associated with lower adiponectin concentrations, higher IL-6 concentrations, higher HOMA-IR, and higher BMI and waist circumference (P <0.05 for all). The magnitude of these associations did not differ by race (Pinteraction>0.1). CONCLUSIONS Lower 25(OH)D concentrations are associated with disturbances in metabolic health in both blacks and whites. Whether correcting vitamin D deficiency could offer a beneficial therapy for additional disease prevention requires further study.
Collapse
Affiliation(s)
- Jennifer L. Jackson
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Suzanne E. Judd
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Bhupesh Panwar
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Virginia J. Howard
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Virginia G. Wadley
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Nancy S. Jenny
- Department of Pathology, University of Vermont College of Medicine, Burlington, VT, USA
| | - Orlando M. Gutiérrez
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, USA
- Corresponding author. Fax: +1 205 996 6465.
| |
Collapse
|