Obesity is often associated with leptin resistance, which leads to a physiological system with high leptin concentration but unable to respond to leptin signals and to regulate food intake. We propose a mathematical model of the leptin-leptin receptors system, based on the assumption that leptin is a regulator of its own receptor activity, and investigate its qualitative behavior. Based on curr...

it has previously been demonstrated that circulating levels of leptin show ethnic differences when controlled for the confounding influence of adiposity. this study examined leptin levels in non-obese and obese subjects with type 2 diabetes of african versus caucasian origin. materials and methods non-obese and obese subjects with type 2 diabetes of either african origin living in dar es salaam...

To clarify the mechanism of leptin resistance during pregnancy, we measured plasma leptin concentrations, free to total leptin ratio (percent free leptin) and soluble leptin receptor concentrations in pregnant women, and compared the results with those in non-pregnant women. We collected plasma samples from 23 non-pregnant and 31 pregnant women in the third trimester. Plasma samples from 5 preg...

The objective of this study was to determine whether obese human adipose tissue contains preformed stores of leptin and their relationship to secreted leptin. Detergent increased detectable leptin by about twofold, suggesting that leptin is stored in a membrane-bound location. Subcutaneous tissue leptin was approximately 1.6-fold higher than omental, paralleling known differences in leptin secr...

Recently, extensive efforts have been made to understand the rate of energy expenditure and the weight gain associated with atypical antipsychotic treatment, including identification of markers of obesity risk. In recent years, leptin, an adipocyte hormone, has gained significant interest in psychiatric disorders. S100B has been considered as a surrogate marker for astrocyte-specific damage in ...

Background: The prevalence of non-alcoholic fatty liver disease is higher in patients with psoriasis than in the normal population. Serum leptin levels are higher in patients with psoriasis and in patients with non-alcoholic fatty liver. The purpose of this study was to determine the serum levels of leptin in psoriatic patients with and without non-alcoholic fatty liver.<span...

Background & Objectives: Several epidemiological studies have indicated factors such as Leptin level, Adiponectin and plasma adiponectin-to-leptin index to be the predicting biomarkers for cardiovascular diseases. Given the importance of healthy nutrition and adequate exercise in reducing the risk of Atherosclerosis, this study aimed to investigate the effects of fasting and aerobic exercise on...

Introduction:Obesity is one of the most serious challenges of our era, with significant health consequences and high economic burden for health systems. Therefore, many countries have developed political agendas to cope with this ever-rising challenge. Along with chemical medications that are developed to manage obesity, researchers have focused on some natural ingredients and herbal extracts w...