Showing 4 results for Leptin
R Esmaeili, T Hassanzadeh,
Volume 8, Issue 3 (8-2014)
Abstract
Abstract
Background and Objective: Metabolic syndrome called a cluster of several metabolic disorders is associated with increased risk of cardiovascular diseases. Genetic differences in leptin receptor gene are related with the concentration and activity of leptin in that these discrepancies can influence lipid levels. We aimed to determine the association between the leptin receptor gene polymorphism on serum lipid profile and leptin activity in metabolic syndrome patients.
Material and Methods: This case-control study was conducted on 200 patients with metabolic syndrome and 200 healthy individuals. Polymerase Chain Reaction (PCR) and Restriction Fragment Length Polymorphisms (RFLP) were used to determine genotypic distribution and allelic frequencies of polymorphisms, respectively. The plasma leptin activity was measured by a kit in a fluorescence spectrometer, and Lipid concentration by routine biochemical and enzymatic assays.
Results: Two groups had significant differences in all measured factors such as lipid profiles, fast blood sugar, waist circumference, blood pressure and leptin concentration (P< 0.05).
Conclusion: Given that the two groups had significant differences in blood and body measurements, no role of K656N polymorphism was observed. Overall, Lys656Asn (K656N) polymorphism of leptin receptor gene is not associated with serum lipid profile and leptin activity with metabolic syndrome.
Keywords: Metabolic Syndrome, Leptin Receptor Gene, PolymorphismK656N
Mohammad Hassan Khadem Ansari , Khadije Meghrazi ,
Volume 11, Issue 4 (7-2017)
Abstract
ABSTRACT
Obesity is a health problem defined as abnormal or excessive fat accumulation in adipose tissue. Adipokines such as adiponectin, visfatin and resistin are bioactive polypeptides with pro- and anti-inflammatory properties that are secreted by the adipose tissue that are involved in the pathogenesis and prognosis of diseases such as type 2 diabetes, metabolic syndrome and cancer. This survey aimed to review the role of these hormones in the pathogenesis and prognosis of breast cancer in obese postmenopausal women. In obese individuals, increased level of leptin leads to tumorigenesis and progression of breast cancer though JAK/STAT3 pathway. These individuals have decreased level of adiponectin, which has a protective effect against carcinogenesis via AMPK pathway. Obese individuals also have increased level of visfatin, which induces the secretion of proinflammatory cytokines such as TNFα and triggers growth of cancer cells. Similarly, elevated resistin levels increases cell proliferation through PI3K and MAPK pathways. Obesity is associated with the dysregulated secretion of adipokines such as leptin, adiponectin, visfatin and resistin, which could be utilized for early diagnosis of breast cancer.
Keywords: Obesity, Breast Cancer, Adiponectin, Leptin, Visfatin, Resistin.
Hossein Nikkar, Amir Rshidlamir, Rambod Khajei, Amene Barjaste, Mohsen Vazifedoost,
Volume 17, Issue 1 (1-2023)
Abstract
Background and objectives: Coronary artery bypass graft (CABG) is a surgical procedure used to treat coronary heart disease. The present study aimed to investigate effects of 8 weeks of combined rehabilitation training on plasma levels of leptin, adiponectin, and resistin in middle-aged men who have undergone CABG.
Methods: The present research was a quasi-experimental study with a pretest-posttest design. The statistical population included all patients who have undergone CABG in Mashhad, Iran. Overall, 26 middle-aged men who have undergone CABG were enrolled in the study. The subjects were divided into a training group (n=14) and a control group (n=12). Data were analyzed in SPSS software (version 21) using analysis of covariance and paired t-test at significance level of 0.05.
Results: Plasma levels of leptin did not change significantly (p=0.709), adiponectin increased significantly (p=0.001), and resistin decreased significantly (p=0.005) after the training intervention.
Conclusion: As a non-pharmacological intervention, the rehabilitation training has cardioprotective effects on patients who undergone CABG.
Chandralekshmy Chandrika, Archana Jayan, Fathima Beevi Osman,
Volume 18, Issue 2 (3-2024)
Abstract
Background: Type 2 DM is a heterogeneous group of disorders characterized by insulin resistance, impaired insulin secretion, increased glucose production, and abnormal fat metabolism. Diabetes mortality primarily results from microvascular complications such as diabetic retinopathy, nephropathy, and neuropathy, as well as macrovascular complications like coronary artery, peripheral vascular, and cerebrovascular diseases. Patients with diabetes usually have changes in adipose tissue metabolism and abnormalities in the secretion of adipokines such as leptin. The present study aims to study the relationship between serum leptin levels and lipid profile parameters among non-obese type 2 diabetes mellitus patients and non-diabetic individuals.
Methods: This hospital-based cross-sectional study was conducted among 41 type 2 diabetic patients and 41 non-diabetic individuals of both sexes between the ages of 40 and 70. Fasting blood glucose (FBS), serum leptin, total cholesterol (TC), triglyceride (TG), and high-density lipoprotein (HDL) levels were assayed.
Results: The mean serum leptin levels among diabetic patients were lower than those of non-diabetic individuals, and this difference in mean was statistically significant. The study showed a significant negative correlation between serum leptin, TC, TG, and low-density lipoprotein (LDL), and a positive correlation with HDL. In the final regression model, serum leptin showed a statistically significant association with FBS and HDL.
Conclusion: This study demonstrated that serum leptin levels can be a strong predictor of low HDL levels in diabetic patients. It can also contribute to raised levels of total cholesterol, triglyceride, and LDL, which are responsible for macrovascular complications in diabetics.
