Showing 4 results for Alani
Nosratollah Zarghami, Behrang Alani, Habib Onsori, Akram Tamizi, Mehran Mesgari,
Volume 5, Issue 2 (18 2005)
Abstract
Background: Leptin, a peptide hormone, is the product of "ob" Gene. Leptin regulate body weight and composition through reducing appetite and energy expenditure in rodents and humans. The aim of this study was to evaluate differences in expression of Leptin Gene in different tissues of streptozotocin induced diabetic rats.
Methods: 40 Sprague Dawely rat were selected. Intra peritoneal injection was carried out in 20 rats and another 20 rats were used as control. After injection of 60mg/kg Streptozotocin, animals were transformed into diabetic. Glucose was measured by glucose oxidase method. Leptin and insulin were measure by commercially available immunoassay kits. After one week treatment, different tissues including adipose tissues, Spleen, epidydimis, and Liver of both control and experimental animals were dissected. For investigation of any changes of the Leptin gene expression in different tissues, RNA was extracted using Trizo1 method. By using RT-PCR technique, Leptin cDNA and β-actin cDNA as internal control were constructed and PCR was carried out. The RT-PCR products were detected on 2% agarose gel using electrophoresis.
Results: Mean serum levels of Leptin was 5.23± 0.45 ng/ml before injection of streptozotocin and markedly decreased in STZ induced diabetic rats to 0.79±0.25 ng/ml. This decrease was statistically significant P<0.05). There was a direct and significant correlation between leptin and insulin in streptozotocin-induced diabetic rats (r=0.37, P<0.05 ) while, this was reverse in control rats ( r= -0.28, P<0.05). Using RT-PCR method, Leptin gene expression in different tissues including fat epidydimis, liver, and spleen showed that the intensity of leptin band with 452 bp was decreased in diabetic rats in comparison to normal rats. Actin Gene expression was identified in PCR products having 403 bp and the intensity was constant in both groups. The reduction rates of "ob" mRNA in fat epidydimis tissue in STZ diabetic rats was remarkable in comparison to Spleen and Liver.
Conclusion: It is speculated that Leptin gene could be under regulation of insulin dependent mechanism in diabetic rats and by modulating Leptin gene expression in diabetic patients, it may be useful in clinical practices.
Nosratollah Zarghami, Amir Bahrami, Majid Mobasseri, Bagher Larijani, Pooran Karimi, Behrang Alanii,
Volume 5, Issue 3 (17 2006)
Abstract
Background: Diabetes is a common endocrine disease in human kind. In most type II diabetic patients, obesity and overweight status account as the serious health problems worldwide and variety of endocrine factors well known that have regulatory role in weight balance and body composition including Leptin and IGF-I factor. The aim of this study was to examine the correlation between Leptin and IGF-I in type II diabetics and controls.
Methods: As a case- control study, 38 type 2 diabetics (20 males and 18 female with mean age 49.22) and 46 healthy controls (16 males and 30 females with mean age 49.52) are recruited. We measured the concentrations of FPG, IGF-I, HbA1C and IGFBP-3 in both groups. FPG was measured by enzymatic glucose oxidase method and Hb Gold analyzer HPLC was used to measure HbA1C. Determination of Leptin, IGF-I, IGFBP-3 and Insulin concentrations were carried out using ELIZA method. P< 0.05 was considered as statistically significant.
Results: The mean of BMI and age were not significantly different in both groups. The mean serum levels of IGF-I, Leptin, Insulin, FPG and HbA1c concentrations in type II diabetics were significantly higher than controls (P< 0.05). In males, the mean serum levels of Leptin were statistically lower than in females in both groups. There was a strong correlation between IGF-I and IGFBP-3, Leptin and insulin, IGF-I and age, and BMI with FPG in both patients and controls (P< 0.05). A reverse correlation was observed between IGF-I and HbA1c in patients and controls (P< 0.05).
Conclusion: It is speculated that based on this findings, Leptin and IGF-I system could have regulatory roles in body composition and fat content particularly in obese and overweight diabetic patients and have significant correlation with Insulin, glucose, BMI and age.
Esfandiar Jahanfar, Abdolhossein Taheri Kalani, Mahmoud Nikseresht,
Volume 24, Issue 2 (6-2024)
Abstract
Background: Type 2 diabetes mellitus, like other inflammatory diseases, causes a change in the levels of pro-inflammatory (such as gremlin-1) and anti-inflammatory (such as pentraxin-3) markers. The aim of the present study was to compare the effects of 10 weeks of aerobic and resistance training on serum levels of pentraxin-3, gremlin-1 and insulin resistance in men with type 2 diabetes.
Methods: In this semi-experimental study, 29 men with type 2 diabetes in the age range of 25-45 years were selected and randomly divided into three groups: aerobic training, resistance training and control. Aerobic training program with an intensity of 55-75% of the maximum heart rate and resistance training with an intensity of 55-75% of one repetition maximum was implemented during 10 weeks and 3 sessions per week. Before and after the intervention period, serum levels of pentraxin-3, gremlin-1 were measured and also insulin resistance index was calculated.
Results: In both aerobic (P= 0.039) and resistance (P= 0.019) training groups, pentraxin-3 serum level increased significantly compared to the control group; but there was no difference between the two groups (P= 0.703). Also, serum levels of gremlin-1 and insulin resistance of the aerobic (P= 0.022 and P= 0.040, respectively) and resistance (P= 0.037 and P= 0.031, respectively) training groups showed a significant decrease compared to the control group; Although there was no difference between the training groups (P= 0.815 and P= 0.659, respectively).
Conclusion: This findings demonstrate that both types of aerobic and resistance training are equally effective in improving inflammatory markers and insulin resistance in type 2 diabetes patients.
Mehrdad Yousefinejad, Mahnaz Omidi, Abdolhossin Taheri Kalani,
Volume 24, Issue 3 (7-2024)
Abstract
Background: Diabetes is a global epidemic and the most common metabolic disorder caused by impaired insulin secretion and glucose metabolism. The aim of this study was to investigate the effect of 8 weeks of aerobic training on serum levels of asprosin and insulin resistance index in diabetic rats.
Methods: The statistical population of this research included 40 10-week-old mice with an initial weight of 250 ± 20 grams, which were randomly divided into four groups (10 mice in each group): diabetic-exercise group (DT), diabetic group - Control (DC), healthy-training group (HT) and healthy-control group (HC) were divided. The program of aerobic exercises was performed for 8 weeks (5 sessions per week) in the form of running on a treadmill. Independent t-test and one-way analysis of variance (ANOVA) with Tukey's post hoc test were used to compare the groups. All data were analyzed at a significance level of 0.05 using SPSS-25 software.
Results: The results of the present study showed that streptozotocin injection induced diabetes in mice (P= 0.001). Induction of diabetes caused a significant increase in the serum levels of asprosin and insulin resistance in mice (P= 0.048 and P= 0.012, respectively). Eight weeks of aerobic training decreased the serum levels of asprosin and decreased insulin resistance in diabetic rats (P= 0.001 and P= 0.036, respectively).
Conclusion: Induced diabetes causes insulin resistance and increase in serum levels of asprosine, which can be improved by performing aerobic exercises.
