Objective: The aim of this study was to investigate the possible effect of sex steroid deficiency on the rat tongue mucosa as well as the effect of its replacement. Methods: We chose 21 sexually virgin female Wistar albino rats in this study. We divided the model rats into 3 groups: Group-1:Control, Group-2: Sham-operated (bilaterally ovariectomized), and Group-3: Sham-operated, in addition we ...

Leptin is a hormone which functions in the regulation of energy homeostasis via suppression appetite. In zebrafish, there are two paralogous genes encoding leptin, called lepa and lepb . gene expression study, we found that gene, not , was significantly downregulated under state insulin-resistance zebrafish larvae, suggesting plays role glucose homeostasis. current characterised -deficient ( −/...

Leptin, the adipokine produced mainly by the white adipose tissue, plays important roles not only in the regulation of food intake, but also in controlling immunity and inflammation. It has been widely demonstrated that the absence of leptin leads to immune defects in animal and human models, ultimately increasing mortality. Leptin also regulates inflammation by means of actions on its receptor...

Leptin is expressed in various tissues, suggesting that this protein is effective not only at the central nervous system level, but also peripherically. Recent studies have shown leptin production by other tissues, including the placenta, stomach, and mammary tissues, but there is no information available concerning expression levels of leptin in the rat mammary gland at different activation st...

Studies seeking a dominant site of action for the hormone leptin have focused on leptin receptor-expressing neuropeptidergic neurons. In this issue, Vong et al. show that leptin regulates energy homeostasis predominantly via a distributed network of GABAergic neurons.

Leptin regulates energy homeostasis and body weight by balancing energy intake and expenditure. It was recently reported that leptin, released into the gut lumen during the cephalic phase of gastric secretion, is capable of initiating intestinal nutrient absorption. Vagal afferent neurons also express receptors for both CCK and leptin, which are believed to interact in controlling food intake. ...

Continuous subcutaneous administration of leptin normalizes blood glucose levels in rodent models of Type 1 and Type 2 diabetes independent of changes in food intake, body weight, and plasma insulin. We tested whether an acute intravenous leptin infusion changed blood glucose in normal and diet-induced leptin-resistant rats to determine whether this measure could be used as a marker of leptin s...

The role of estradiol in mediating leptin's effects on body weight was assessed in ovariectomized (OVX) mice before and after the onset of obesity. Ovariectomy did not alter leptin levels before the onset of obesity, and estradiol adminstration (0.05-17 μg/day for 14 days) did not significantly alter leptin levels if they were corrected for the estradiol-induced reduction in body fat. The conve...

It has been established that leptin exerts a negative control on food intake, allowing one to maintain stable caloric intake over time. The aim of the present study was to investigate whether leptin regulates food intake when a supply of calories is provided by the systemic route. Experiments were carried out in leptin receptor-deficient obese fa/fa rats and lean Fa/fa controls. In both groups,...