scholarly journals Serum 25-Hydroxy Vitamin D and Insulin Resistance, Metabolic Syndrome, and Glucose Intolerance Among Arab Americans

Diabetes Care ◽  
2010 ◽  
Vol 33 (6) ◽  
pp. 1373-1375 ◽  
Author(s):  
N. R. Pinelli ◽  
L. A. Jaber ◽  
M. B. Brown ◽  
W. H. Herman
Keyword(s):  
Insulin Resistance ◽  
Metabolic Syndrome ◽  
Vitamin D ◽  
Glucose Intolerance ◽  
Arab Americans ◽  
25 Hydroxy Vitamin D

Abstract 122: Cardiac mTOR Preserves Cardiac Function Following Ex Vivo Ischemia-Reperfusion in Diet-Induced Obese Mice

2012 ◽  
Vol 111 (suppl_1) ◽  
Author(s):  
Toshinori Aoyagi ◽  
Takashi Matsui
Keyword(s):  
Insulin Resistance ◽  
Metabolic Syndrome ◽  
Cardiac Function ◽  
Glucose Intolerance ◽  
Ex Vivo ◽  
Ischemia Reperfusion ◽  
Left Ventricular ◽  
Heart Weight ◽  
Diabetic Patients ◽  
Significant Difference

The risk of heart failure following myocardial infarction is higher in diabetic patients than nondiabetic patients. The mammalian target of rapamycin (mTOR), a key downstream molecule of insulin-phosphoinositide 3-kinase (PI3K)-Akt signaling pathway, plays an important role in cardioprotection. However, the role of cardiac mTOR in ischemic injury in metabolic syndrome has not been well defined. To address this question, we studied the effect of overexpressing cardiac mTOR on cardiac function following ischemia/reperfusion (I/R) in mice with high-fat diet (HFD)-induced obesity. In this study, we used transgenic mice with cardiac-specific overexpression of mTOR (mTOR-Tg) as reported previously. mTOR-Tg and WT mice at 6 weeks old were fed HFD (60% fat by calories) ad libitum for 14 weeks. Control mTOR-Tg and WT mice were fed a normal chow diet (NCD). At 14 weeks after HFD, glucose and insulin tolerance tests demonstrated that HFD generated glucose intolerance and insulin resistance in both mTOR-Tg (n=20) and WT (n=24) mice. Body weight (BW) and heart weight (HW) were significantly higher in HFD mice than SCD mice (p<0.001 for BW in both strains; p<0.001 and p<0.01 for HW/tibia length, WT and mTOR-Tg, respectively) but there was no difference in BW or HW between HFD-mTOR-Tg and HFD-WT mice. Hearts from all four groups were subjected to global I/R (20 min ischemia, 40 min reperfusion) in the ex vivo Langendorff perfusion model. Baseline left ventricular developed pressure (LVDP) was higher in HFD mice than NCD mice in both strains [185.8 ± 10.7 vs. 143.6 ± 5.0 mmHg, HFD-WT (n=11) vs. NCD-WT (n=10) mice, p<0.01; 178.6 ± 10.1 vs. 135.0 ± 6.3, HFD-mTOR-Tg (n=8) vs. NCD-mTOR-Tg (n=11) mice, p<0.01]. Functional recovery after I/R was significantly lower in HFD-WT mice than NCD-WT mice (percent recovery of LVDP, 15.3 ± 5.4 vs. 44.6 ± 6.3 %, HFD-WT vs. NCD-WT mice, p<0.01). Intriguingly, there was no significant difference in LVDP recovery between HFD-mTOR-Tg and NCD-mTOR-Tg mice (36.5±10.8 vs. 58.8±6.0 %, HFD-mTOR-Tg vs. NCD-mTOR-Tg mice, n.s.). These findings suggest that cardiac mTOR is sufficient to substantially limit the metabolic syndrome-induced cardiac dysfunction following I/R in a mouse model of obesity with glucose intolerance and insulin resistance.

scholarly journals GPER Deficiency in Male Mice Results in Insulin Resistance, Dyslipidemia, and a Proinflammatory State

Endocrinology ◽  
2013 ◽  
Vol 154 (11) ◽  
pp. 4136-4145 ◽  
Author(s):  
Geetanjali Sharma ◽  
Chelin Hu ◽  
Jonathan L. Brigman ◽  
Gang Zhu ◽  
Helen J. Hathaway ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Metabolic Syndrome ◽  
Glucose Intolerance ◽  
Fasting Blood Glucose ◽  
Interferon Γ ◽  
Male Mice ◽  
Glucose Levels ◽  
Obesity And Diabetes ◽  
Increased Risk ◽  
One Year

Estrogen is an important regulator of metabolic syndrome, a collection of abnormalities including obesity, insulin resistance/glucose intolerance, hypertension, dyslipidemia, and inflammation, which together lead to increased risk of cardiovascular disease and diabetes. The role of the G protein-coupled estrogen receptor (GPER/GPR30), particularly in males, in these pathologies remains unclear. We therefore sought to determine whether loss of GPER contributes to aspects of metabolic syndrome in male mice. Although 6-month-old male and female GPER knockout (KO) mice displayed increased body weight compared with wild-type littermates, only female GPER KO mice exhibited glucose intolerance at this age. Weight gain in male GPER KO mice was associated with increases in both visceral and sc fat. GPER KO mice, however, exhibited no differences in food intake or locomotor activity. One-year-old male GPER KO mice displayed an abnormal lipid profile with higher cholesterol and triglyceride levels. Fasting blood glucose levels remained normal, whereas insulin levels were elevated. Although insulin resistance was evident in GPER KO male mice from 6 months onward, glucose intolerance was pronounced only at 18 months of age. Furthermore, by 2 years of age, a proinflammatory phenotype was evident, with increases in the proinflammatory and immunomodulatory cytokines IL-1β, IL-6, IL-12, TNFα, monocyte chemotactic protein-1, interferon γ-induced protein 10, and monokine induced by interferon gamma and a concomitant decrease in the adipose-specific cytokine adiponectin. In conclusion, our study demonstrates for the first time that in male mice, GPER regulates metabolic parameters associated with obesity and diabetes.

scholarly journals Plasma vitamin D levels and risk of metabolic syndrome in Canadians

2011 ◽  
Vol 34 (6) ◽  
pp. 377 ◽  
Author(s):  
Darren R Brenner ◽  
Paul Arora ◽  
Bibiana Garcia-Bailo ◽  
Thomas MS Wolever ◽  
Howard Morrison ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Metabolic Syndrome ◽  
Vitamin D ◽  
Plasma Level ◽  
Linear Models ◽  
Smoking Status ◽  
Plasma Vitamin ◽  
Model Assessment ◽  
Vitamin D Levels ◽  
Metabolic Syndrome Components

Purpose: Vitamin D deficiency has been implicated in susceptibility to the development of metabolic syndrome, obesity and type 2 diabetes mellitus. The present study aimed to quantify the association between vitamin D plasma level, the number of metabolic syndrome components and insulin resistance in Canadians. Methods: Vitamin D plasma level and clinical data were determined from 1,818 subjects from the Canadian Health Measures Survey; a representative health survey of the general population of Canada conducted from 2007 to 2009. The definition of metabolic syndrome was based on the National Cholesterol Education Program, Adult Treatment Panel III criteria. Adjusted general linear models were used to estimate the association between vitamin D level and probability of having metabolic syndrome, as well as the association between plasma vitamin D and insulin resistance (homeostasis model assessment for insulin resistance, or HOMA-IR). Results: The prevalence of metabolic syndrome in the study population was 8.9%. The number of metabolic syndrome components was inversely correlated with plasma vitamin D level (ρ= -0.1, p < 0.0001). Subjects in the highest vitamin D quartile had lower odds ratio of metabolic syndrome compared with their counterparts in the lowest vitamin D quartile (0.50, 95% CI= 0.24-1.06). Increasing plasma vitamin D level (by 10 nmol/L) was inversely associated with HOMA-IR score (β= -0.08, p=0.006) in a model adjusted for physical activity, smoking status, month of interview, age, sex and ethnicity. Conclusion: Vitamin D plasma levels are associated with the occurrence of metabolic syndrome components and insulin resistance among Canadians and are linked to increased level of insulin resistance.

scholarly journals World endocrinology news

2008 ◽  
Vol 5 (2) ◽  
pp. 45-54
Author(s):  
M A Berkovskaya
Keyword(s):  
Insulin Resistance ◽  
Cardiovascular Disease ◽  
Metabolic Syndrome ◽  
Vitamin D ◽  
Glucose Metabolism ◽  
Oral Cancer ◽  
Fat Distribution ◽  
Lower Prevalence ◽  
The Metabolic Syndrome

The role of interleukin-6 in insulin resistance, body fat distribution and energy balance Disorders of glucose metabolism and risk of oral cancer. Duration of lactation is associated with lower prevalence of the metabolic syndrome in midlife--SWAN, the study of women's health across the nation. Vitamin D deficiency and risk of cardiovascular disease. Adypocyte prolactin: regulation of release and putative functions.

Role of Vitamin D in Prevention of Metabolic Syndrome and Cardiovascular Diseases

2021 ◽  
Vol 20 (2) ◽  
pp. 431-438
Author(s):  
Raisa Aringazina ◽  
Gulnara Kurmanalina ◽  
Bakhtiyar Kurmanalin ◽  
Tatyana Degtyarevskaya
Keyword(s):  
Insulin Resistance ◽  
Metabolic Syndrome ◽  
Vitamin D ◽  
Cardiovascular Diseases ◽  
Vitamin D3 ◽  
Cardiovascular Events ◽  
Medical Science ◽  
Resistance Index ◽  
Duration Of Treatment

Objective: About 90% of cardiovascular diseases can be prevented. In recent years, the role of vitamin D in the prevention of cardiovascular disease and components of metabolic syndrome has been actively discussed. The study aimed to investigate the possible influence of vitamin D3 on the emergence risk of metabolic syndrome and adverse cardiovascular events. Materials and methods: The study enrolled a total of 336 people (170 males and 166 females) aged 50-60 years. For comparative analysis, two groups were formed: Group 1 group involved 150 people treated with placebo, and Group 2 group included 186 people who received vitamin D3 orally in a dose of 2000 IU/day. The duration of treatment and observation was four years. Participants in the study completed a questionnaire developed by the authors of this paper, in which they answered questions about the presence of factors contributing to the development of cardiovascular pathology. Results and Discussion: Daily oral intake of vitamin D3 in a dose of 2000 IU/day for four years did not improve laboratory indicators, which are components of MS, namely, the content in the blood of TC, TG, LDL, HDL, AI, fasting and postprandial glycemia, insulin, and insulin resistance index HOMA2-IR (p>0.05). Prolonged use of vitamin D3 did not reduce the risk of cardiovascular diseases (myocardial infarcts (RR=0.93, 95% CI [0.21-4.09], p=0.92), strokes (RR=1.24, 95% CI [0.18-8.70], p=0.83), stenting (RR=1,23, 95% CI [0.32-4.88], p=0.76), arterial hypertension (RR=1.12, 95% CI [0.47-2.68], p=0.81), as well as cardiovascular death rates (RR=0.83, 95% CI [0.14-4.88], p=0.83) and death from any other causes (RR=0.93, 95% CI [0.21- 4.09], p=0.92). Conclusion: Thus, daily prolonged oral administration of vitamin D3 in a dose of 2000 IU/day does not contribute to the improvement of blood lipid spectrum, glycemia, and insulin resistance in metabolic syndrome and does not reduce the risk of adverse (fatal and non-fatal) cardiovascular events. Bangladesh Journal of Medical Science Vol.20(2) 2021 p.431-438

scholarly journals Association of 25(OH)D and PTH with Metabolic Syndrome and Its Traditional and Nontraditional Components

2011 ◽  
Vol 96 (1) ◽  
pp. 168-175 ◽  
Author(s):  
Sheena Kayaniyil ◽  
Reinhold Vieth ◽  
Stewart B. Harris ◽  
Ravi Retnakaran ◽  
Julia A. Knight ◽  
...  
Keyword(s):  
Metabolic Syndrome ◽  
Vitamin D ◽  
Waist Circumference ◽  
Density Lipoprotein ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Supplement Use ◽  
The Metabolic Syndrome ◽  
Multivariate Adjustment ◽  
25 Hydroxy Vitamin D

Context: Emerging evidence suggests that 25-hydroxy vitamin D [25(OH)D] and PTH may play a role in the etiology of the metabolic syndrome (MetS). However, evidence to date is limited and inconsistent, and few studies have examined associations with nontraditional MetS components. Objective: The objective of the study was to examine the association of vitamin D and PTH with MetS and its traditional and nontraditional components in a large multiethnic sample. Design, Setting, and Participants: In this cross-sectional study, we examined 654 participants from London and Toronto, Ontario, Canada, aged 30 yr and older with risk factors for type 2 diabetes. Main Outcome Measures: Presence of MetS and its traditional and nontraditional components was measured. Results: Approximately 43% of the study participants were classified as having MetS. Higher 25(OH)D was significantly associated with a reduced presence of MetS after adjustment for age, sex, season, ethnicity, supplement use, physical activity, and PTH (odds ratio 0.76, 95% confidence interval 0.62–0.93). PTH was not associated with the presence of MetS after multivariate adjustment. Multivariate linear regression analyses indicated significant adjusted inverse associations of 25(OH)D with waist circumference, triglyceride level, fasting insulin, and alanine transaminase (P &lt; 0.041). Elevated PTH was positively associated with waist circumference and high-density lipoprotein cholesterol (P &lt; 0.04). Other associations between PTH and MetS components were attenuated after adjustment for adiposity. Conclusions: Serum 25(OH)D, but not PTH, was significantly associated with MetS as well as a number of MetS components after multivariate adjustment. These results suggest that low 25(OH)D may play a role in the etiology of the MetS.

AB0425 Plasma vitamin D levels in relation to insulin resistance and risk of metabolic syndrome in rheumatoid arthritis patients

2013 ◽  
Vol 71 (Suppl 3) ◽  
pp. 661.16-661
Author(s):  
B. Seriolo ◽  
S. Paolino ◽  
G. Botticella ◽  
A. Casabella ◽  
L. Molfetta ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Insulin Resistance ◽  
Metabolic Syndrome ◽  
Vitamin D ◽  
Plasma Vitamin ◽  
Vitamin D Levels
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