Showing 12 results for Vitamin D
Arash Hossein-Nezhad, Jila Maghbooli, Seyed Masoud Arzaghi, Alireza Shafaei, Mazaher Rahmani, Bagher Larijani,
Volume 5, Issue 3 (5-2006)
Abstract
Background: Although there is increasing evidences that vitamin D is related to the occurrence of diabetes mellitus, its relation to glucose metabolism in pregnancy is not well studied. This study investigated 25-hydroxyvitamin D deficiency status in GDM pregnant women.
Methods: As a cross sectional study we recruited 741 pregnant women referred to five university educating hospital clinics. The universal screening was performed with a GCT-50g and those with plasma glucose level ≥130mg/dl, were diagnosed as GDM, if they had an impaired GTT-100g based on Carpenter and Coustan criteria. The levels of insulin was studied during OGTT-100g. Serum concentrations of 25-hydroxy vitamin D was measured too.
Results: Univeriate analysis revealed that 25 (OH) vit D concentrations were positively correlated with HOMA and ISOGTT index. Subjects with hypovitaminosis D (<12.5nmol/dl) had greater prevalence of GDM than others.
Conclusion: The results reveal a positive association between 25(OH) vit D concentrations and insulin sensitivity. Vit D deficiency is more prevalent in patients with GDM than normal pregnant women, So vit D supplementation may control glucose levels and improves outcome of pregnancy.
Nima Baziar, Kurosh Djafarian, Zhaleh Shadman, Mostafa Qorbani, Mohsen Khoshniat Nikoo, Farideh Razi,
Volume 13, Issue 5 (7-2014)
Abstract
Background: Vitamin D deficiency is associated with impaired insulin secretion, glucose intolerance and type 2 diabetes. This study was conducted to investigate the effects of supplementation with 50,000 IU vitamin D on improving serum vitamin D levels and insulin resistance in vitamin D insufficient or deficient type 2 diabetic patients.
Methods: In this double blind randomized clinical trial, 81 type 2 diabetic patients with vitamin D levels between 10-30 ng/ml were randomly assigned to intervention (50,000 IU vitamin D3 once a week) and control (placebo once a week) groups according to gender. The study duration was 8 weeks. At the beginning and the end of study, blood samples were collected after 12 hours overnight fasting and fasting serum glucose, insulin and 25-hydroxyvitamin D were measured. Insulin resistance was obtained by HOMA-IR calculation.
Results: After 8 weeks supplementation with vitamin D, 25-hydroxyvitamin D level was significantly increased and reached to normal levels in the intervention group. Fasting serum glucose and insulin concentrations and HOMA-IR were significantly decreased in the vitamin D group, but there were no significant changes in the placebo group.
Conclusion: Supplementation with 50,000 IU vitamin D for 8 weeks compared to placebo can improve inadequate levels of vitamin D and glycemic indicators in vitamin D insufficient or deficient type 2 diabetic patients.
Saadat Karimi- Hasanabad, Maryam Rafraf, Mohammad Asghari-Jafarabadi,
Volume 14, Issue 1 (1-2015)
Abstract
Background: Vitamin D deficiency is an unrecognized epidemic and a common health problem worldwide. The objective of our study was to determine the prevalence of vitamin D deficiency and its relationship with overall and abdominal obesity in adolescent girls.
Methods: This cross-sectional, descriptive study was conducted on girls aged 14-17 years whom were selected by multistage random sampling from four districts of Boukan. Questionnaires about general characteristics, dietary intake and physical activity were completed by interviewing with the subjects. Anthropometric measurements were performed. Fasting blood samples were collected for determining of serum of 25 (OH) D levels. Data was analyzed by using SPSS software and descriptive statistics tests and partial correlation test.
Results: The Mean of serum 25(OH) D was 7.26 (SD 2.81) ng/ml and 100% of subjects had vitamin D insufficiency. According to CDC (Centers for Disease Control and Prevention) criteria the prevalence of overweight, obesity and abdominal obesity were 18.5%, 1.4% and 26.4% respectively. There were significant reverse correlation between serum 25(OH) D and WC (r= -0.112, p=0.047).
Conclusion: The Results of this study indicate that vitamin D deficiency is a major health problem among studied adolescents. Given the reverse association between vitamin D status and abdominal obesity appropriate approaches are needed to improve vitamin D status and lowering the prevalence of obesity among adolescents. Such conditions may prevent prevalence of chronic disease in adolescents' lives over the coming years.
Mehdi Sadeghian, Zatollah Asemi, Maryam Karamali, Parvane Saneei, Esmaillzadeh Ahmad ,
Volume 15, Issue 1 (1-2016)
Abstract
Background: This study was designed to assess the effects of calcium and vitamin D supplementation on the metabolic status of pregnant women with gestational diabetes mellitus (GDM).
Methods: This randomized placebo-controlled trial was performed at maternity clinics affiliated to Kashan University of Medical Sciences, Kashan, Iran. Participants were 56 women with GDM at 24–28 weeks gestation (18 to 40 years of age). Subjects were randomly assigned to receive calcium plus vitamin D supplements or placebo. All study participants were blinded to group assignment. Individuals in the calcium–vita- min D group (n = 28) received 1,000 mg calcium per day and a 50,000 U vitamin D3 pearl twice during the study (at study baseline and on day 21 of the intervention), and those in the placebo group (n = 28) received two placebos at the mentioned times. Fasting blood samples were taken at study baseline and after 6 weeks of intervention.
Results: The study was completed by 51 participants (calcium–vitamin D n = 25, placebo n =26). However, as the analysis was based on an intention-to-treat approach, all 56 women with GDM (28 in each group) were included in the final analysis. After the administration of calcium plus vitamin D supplements, we observed a significant reduction in fasting plasma glucose (p < 0.001), serum insulin levels (p = 0.02) and HOMA-IR (p = 0.001) and a significant increase in QUICKI (p = 0.003) compared with placebo. In addition, a significant reduction in serum LDL-cholesterol (P=0.02) and total cholesterol: HDL-cholesterol ratio (p = 0.003) and a significant elevation in HDL-cholesterol levels (p = 0.01) was seen after intervention in the calcium–vitamin D group compared with placebo. In addition, calcium plus vitamin D supplementation resulted in a significant increase in GSH (p =0.03) and prevented a rise in MDA levels (p = 0.03) compared with placebo.
Conclusion: Calcium plus vitamin D supplementation in women with GDM had beneficial effects on their metabolic profile.
Marzieh Arshadi Mashkani, Mahsa Mohammad Amoli, Iman Salahshorifar, Farideh Razi,
Volume 16, Issue 3 (3-2017)
Abstract
Background: Diabetes is the most common endocrine disorder that affects many people every year. Diabetic nephropathy is main complication of diabetes type 2. Renoprotective effects of vitamin “D” in chronic kidney disease have been reported that including diabetic nephropathy. The purpose of this study is to investigate the association between polymorphism (rs731236 (Taq1)) at gene receptor vitamin D (VDR), and the risk of diabetic nephropathy in patients with type 2 diabetes.
Methods In this case-control study, 104 patients with type 2 diabetes and nephropathy, 100 patients with type 2 diabetes and no nephropathy, and 98 people without diabetes and nephropathy who referred to the Diabetes Clinic of Tehran University of Medical Sciences were included . Clinical data were obtained and biochemical parameters were measured. The DNA samples were extracted from blood samples by phenol chloroform method. TheTaqI polymorphism (rs731236) was studied by TaqMan specific genotypes.
Results: Urea, creatinine and urine albumin values were significantly higher and glomerular filtration rate was lower in nephropathy group. Although frequency of TT genotype and also T allele was higher in nephropathy group, the difference was not significant.
Conclusion: There was no association between Taq1 polymorphism and diabetic nephropathy in the studied population
Laleh Ranjbar, Farzaneh Taghian, Mehdi Hedayati,
Volume 17, Issue 4 (5-2018)
Abstract
Background: Apelin is an Adipokine which is recently discovered and widely secreted from white adipose tissue and in fat and overweight person, apelin values and gene expression increase .In this study, the effect of one period aerobic exercise and vitamin D consumption on weight, plasma apelin values and insulin resistance in overweight women was researched.
Method: In order to doing this reasearch 40 women whom have over weight with , average old , weight , height, BMI and WHR respectively : (30.37 ± 6.91) years old , (74.89 ± 12.97) kg , (157 ± 7.02) m , (30.08 ± 3.95) kg/m2 , (0.81 ± 0.07). After passing the medical sepration dived to 4 experimental group: 1st experiment group (aerobic exercise) n=10, 2nd experimental group (aerobic exercise and vitamin D) n=10, 3rd experimental group (vitamin D) n=10 and control group n=10. At first body composition was measured th included: BMI, WHR, weight, waist and hip size. After that the blood sample was taken from triables. (Fasting) and amount of the apelin, glucose, insulin, vitamin D, triglycerides, cholesterol, LDL and HDL were measured. Then experimental group 1 and 2 were encounterd and emotionalized by an aerobic exercise (treadmill) after 10 weeks all of the measure mented conversionxls were measure again befor the test. For comparisoning of the groupa that befor and after the test was used from –t test and if was used from the variance test for comparisoning two group.
Results: results showed that after 10 week of aerobic exercise an vitamin D using : BMI, WHR, apelin, cholesterol, LDL, glucose, insulin and insulin resistance were reduced, a triglyceride also decrease and HDL had a significant increasing.
Conclusion: Result confirmed the positive effect of the aerobic exercise on body compositions apelin and plasmas Lipoprotein and also showed that using vitamin D using in obese people and people who have overweight can be beneficials.
Seyed Habibollah Mousavi Bahar, Mehdi Komaki, Nasim Karimi, Ronak Hamzehei,
Volume 18, Issue 1 (1-2019)
Abstract
Background: Vitamin D plays an important role in the health, survival and fertility of humans, This Vitamin has a significant role in calcium homeostasis and cellular growth and facilitating normal immune system function. In recent years, the role of vitamin D in various diseases has been highlighted. Regarding high prevalence of vitamin D deficiency in Iran, The aim of this study was to determine the prevalence and status of vitamin D of Hamadan.
Method: A cross-sectional descriptive study in a one-year period, 7816 patients were referred to the laboratories of Shahid Beheshti and Farshchian Sina Hospitals of Hamadan Were investigated. The data was analyzed using R-version 3.2.3 and at a significant level of 0.05. The modified effect of age and sex factors on vitamin D level was investigated using logistic regression model.
Results: The prevalence of vitamin D deficiency was 0.69 in Hamadan province. 20.2% had severe deficiency (less than 10 Ng/ml) vitamin D, 20.5% moderate deficiency (10 to 20 Ng /ml), 28.6% mild deficiency (20 to30 Ng/ml), the prevalence of this deficiency was 46.7% in men and 38.7% in women. According to the results, there is a significant relationship between sex and age with vitamin D levels (p-value <0.001).
Conclusion: Based on this study and other studies, vitamin D deficiency is common in Iran and requires further investigation to improve the quality of life and prevent complications from deficiency of this essential vitamin.
Zahra Hajhashemy, Elham Moslemi, Parvane Saneei,
Volume 21, Issue 2 (7-2021)
Abstract
Background: Although the relation of serum vitamin D levels with abdominal obesity has been investigated by previous observational studies, the results are inconsistent. In the current study, a dose-response meta-analysis was conducted on epidemiologic studies that evaluated this association in adults.
Methods: We performed a systematic search of all published articles, up to May 2020, in five electronic databases. A total of 41 observational studies that reported odds ratios (ORs) or relative risks (RRs) with 95% confidence intervals (CIs) for abdominal obesity in relation to serum vitamin D levels in adults were found.
Results: Meta-analysis on 36 cross-sectional studies (combining 44 effect sizes) with 257699 participants, illustrated that the highest serum vitamin D level in comparison with the lowest serum vitamin D level was significantly related to 23% decreased odds of central obesity (OR=0.77; 95%CI:0.71-0.83). This inverse association was also significant in almost all subgroups based on different covariates. Based on dose-response analysis, each 25 nmol/l increase in serum vitamin D levels, was related to 8% reduced risk of central obesity (OR=0.92;95%CI:0.85,0.99). After limiting the analysis to 23 effect sizes from 17 studies with representative population (242135 participants), the same results were obtained (OR=0.79; 95%CI: 0.71-0.87). Based on dose-response analysis on studies with representative populations, each 25 nmol/l increase in blood vitamin D levels was linked to 10% decreased central adiposity risk(OR=0.90; 95%CI: 0.82, 0.99).
Conclusion: In this meta-analysis of epidemiologic studies, we demonstrated an inverse significant relation between serum vitamin D levels and risk of central obesity in adults, in a dose-response manner. The same findings were obtained in representative populations.
Hadi Golpasandi, Mohammad Rahman Rahimi, Slahadin Ahmadi,
Volume 23, Issue 5 (12-2023)
Abstract
Background: The present study was conducted to investigate the effect of eight weeks of aerobic training and vitamin D3 supplementation on cardiac irisin protein levels, insulin resistance and lipid profile in rats induced with type 2 diabetes.
Methods: Forty male Wistar rats after induction of type 2 diabetes through the combination of high-fat diet +streptozotocin were randomly divided into five groups: 1) Normal control (NC) ,2) Diabetic Control (DC), 3) Diabetes+ Aerobic Training (DAT) ,4) Diabetes+ Vitamin D3 (DVD) and 5) Diabetes+ Aerobic Training+ Vitamin D3 (DVDAT). Aerobic training program (five times a week with 60% intensity of maximum running speed for one hour) and vitamin D3 supplementation (10000 IU/kg every week) were performed. After anesthetizing the rats, blood samples were taken to evaluate serum glucose, insulin, triglyceride, cholesterol, LDL and HDL levels. The heart tissue was isolated to evaluate the irisin.protein.
Results: The results of the one way analysis of variance showed that the irisin protein level of the heart tissue in DAT, DVD and DVDAT groups had a significant increase of 14.04, 12.28 and 24.56%, respectively compared to DC (P<0.001). Insulin resistance also showed a significant decrease in all intervention groups compared to the DC group (P<0.001); However, HDL, triglyceride and cholesterol levels were significantly decreased in DAT and DVDAT groups compared to DC group (P<0.001).
Conclusion: According to the results, it seems that eight weeks of aerobic training and vitamin D3 supplementation probably improves the insulin resistance index and lipid profile in rats induced to type 2 diabetes through increasing the cardiac irisin.
Asma Soleimani, Mohammad Fathi, Mostafa Bahrami,
Volume 24, Issue 3 (7-2024)
Abstract
Background: The purpose of this study was to investigate the effect of sports rehabilitation exercises with vitamin D consumption on fatigue, sleep quality and depression level of people with osteosarcoma cancer after bone marrow stem cell transplantation.
Methods: In this study, 27 women with osteosarcoma cancer with body mass index above 30 kg/m2, age 24.90±4.03 years, height 163.85±3.62 cm and weight 82.17±4.5 kg were randomly divided into four groups. (patient-exercise), (patient-exercise-vitamin D), (patient-exercise-placebo) and (control) were divided. The training protocol includes ten weeks of Pilates exercise. The supplement group took 500 IU of vitamin D three days a week for 10 weeks. Data were analyzed using dependent t-test and one-way analysis of variance.
Results: The results of the covariance analysis of the research of three exercise groups showed that after ten weeks of sports rehabilitation with vitamin D consumption, the indicators of fatigue and the level of depression decreased significantly (P≤ 0.05). Also, the results of covariance analysis of the three training groups showed that the overall sleep quality of people with osteosarcoma cancer increased significantly (P≤ 0.05). Conclusion: Based on the obtained results, it is suggested that the consumption of vitamin D along with exercise rehabilitation can be an effective treatment method for fatigue, sleep quality and depression in people with osteosarcoma cancer.
Conclusion: Based on the obtained results, it is suggested that the consumption of vitamin D along with sports rehabilitation can be an effective treatment method for fatigue, sleep quality and depression in people with osteosarcoma cancer.
Leila Rahmani, Mohammad Rahman Rahimi, Shamseddin Ahmadi , Hassan Faraji,
Volume 24, Issue 4 (10-2024)
Abstract
Background: Glucose transporter4 (GLUT4) is the main glucose transporter in skeletal muscle. Impaired GLUT4 expression plays a role in the disorders of glycemic homeostasis. The aim of the present study was to investigate the combined effects of aerobic training and vitamin D3 supplementation on Glut4 protein levels and insulin resistance in the soleus muscle of diabetic rats with STZ and high-fat diet.
Methods: In 40 male Wistar rats type 2 diabetes was induced by 6 weeks high-fat diet followed by streptozotocin injection. Then rats were randomly divided into five groups: Healthy control (HC), Diabetic control (DC). Diabetes+Aerobic training (DAT), Diabetes+Vitamin D3 (DVD) and Diabetes+Aerobic training+ Vitamin D3 (DVDAT). The rats underwent eight weeks of aerobic training and vitamin D3 supplementation. 24h after last session of training and, the rats were anesthetized and soleus muscle was isolated for measurement of Glut4 protein concentrations and serum levels of insulin, glucose, vitamin D3 index were measured.
Results: One-way ANOVA showed that GLUT4 protein levels in DC group was significantly lower than HC group (P<0.001), but in DVDAT group was significantly higher than DC group (P<0.04) and DVD group (P<0.005). Also in DAT group was significantly higher than DVD (P<0.018). The HOMA-IR index also in DVDAT, DAT and DVD groups was significantly lower than DC group (P<0.001).
Conclusion: It seems that Eight weeks of aerobic training with vitamin D3 supplementation improves glucose metabolism in diabetic rats via increasing Glut4 protein levels and improving insulin resistance index.
Dr. Alireza Bagheri, Dr. Hamidreza Aghaei Meybodi, Dr. Mohammadreza Mohajeri, Dr. Akbar Soltani, Dr. Ramin Heshmat, Dr. Bagher Larijani,
Volume 25, Issue 1 (2-2024)
Abstract
Background: Vitamin D (vitD3) deficiency is common in Iran. Although there are several studies on therapeutic doses of vitD3, the optimal dose is to be evolved. we compared the effects of high dose supplemental vitD3 versus its recommended dose on the serum level of 25(OH)D.
Methods: This clinical trial study is performed at Endocrine & Metabolism Research Institute in Shariati Hospital within 2008-2009. The subjects were osteopenic women older than 50 years who had been referred to Bone Densitometry laboratory. They were received either (group P) 50000u vitD3 weekly for 3 months then monthly for another 9 months, or (group M) 800u vitD3 daily for one year. 1000 mg calcium carbonate was given to both groups. Serum 25(OH)D, Calcium, Phosphorus, PTH was checked at base, 3rd, 6th and 12th month. 24h Urine for calcium was collected before and at the end of trial.
Results: Serum 25(OH)D level was significantly higher in group P at 3rd month (p<0.05), but it gradually declined and there was not statistically difference to group M. PTH decreased in both groups. Urine calcium to creatinine ratio did not rise in both groups.
Conclusion: vitD3 supplement at doses of 50000u weekly for 3 months then monthly for another 9 months as compare to 800u vitD3 daily for one year increases serum 25(OH)D at higher level without causing hypercalcemia and hypercalciuria, but it seems that more frequent doses in monthly period would be required to maintain the optimal 25(OH)D level.
