objective: melanocortin-4 receptor (mc4r) and agouti-related peptide (agrp) are involved in energy homeostasis in the rat. the aim of the present study was to evaluate the expression of mc4r and agrp mrnas in arcuate nucleus (arc) during long term malnutrition of female ovariectomized rats. materials and methods: ten female ovariectomized rats were divided into two equal groups (n=6) of normal ...

the effects of chronic stress and glucocorticoids receptor antagonist (ru486) on expression of melanocortin 4 receptor (mc4r) mrna in arcuate nucleus (arc) of male rats were evaluated. in this study, adult male sprague dawley rats were placed into four groups (n=6/group) stress, ru486, stress/ru486, and control groups. in stress group, the rats were restrained, 1 h/day, for 12 days. in ru486 gr...

melanocortin- 4 receptor (mc4r) and agouti- related peptide (agrp) are involved in energy homeostasis in rats. according to mc4r and agrp effects on luteinizing hormone (lh) secretion, they may influence the estrous cycle of rats. therefore, the aim of this study was to investigate the expression of mc4r and agrp mrnas at different stages of estrous cycle in the rat’s hypothalamus. the estrous ...

Identification of Polymorphism Melanocortin 4 Receptor Gene and its Association with Egg Production Traits in Turkey

The Melanocortin-4 Receptor is a G-protein coupled receptor that has been physiologically linked to participate in the regulation of energy homeostasis. The Melanocortin-4 Receptor is stimulated by endogenous melanocortin agonists derived from the pro-opiomelanocortin gene transcript and antagonized by the endogenous antagonist agouti-related protein. Central administration of melanocortin agon...

Abstract The leptin-melanocortin pathway is playing a pivotal role for central body weight regulation. melanocortin 4 receptor (MC4R) essential to induce satiety after activation by the endogenous ligands α-/β-melanocyte-stimulating hormone. relevance of biased signaling exemplified an MC4R agonist, which has been approved treatment rare forms monogenic obesity. Here discussed as new option dev...

The recent cloning of three melanocortin receptors suggests an unexpected diversity in this family of seven transmembrane G-protein linked receptors. Herein, we report the cloning, expression, and gene localization of a fourth human melanocortin receptor, the melanocortin-4 receptor. By Northern blot analysis and in situ hybridization, this receptor is expressed primarily in the brain, but its ...

Objective(s): Type 1 diabetes (T1D) is an autoimmune disease resulting from inflammatory destruction of islets β-cells. Nowadays, progress in cell therapy, especially mesenchymal stem cells (MSCs) proposes numerous potential remedies for T1D. We aimed to investigate the combination therapeutic effect of these cells with insulin and metformin on neuropeptide Y, melanoco...

Melanocortin signalling is mediated by binding to a family of G protein-coupled receptors that positively couple to adenylyl cyclase. Tetrapod species have five melanocortin (MC(1)-MC(5)) receptors. The number of receptors varies in fish, zebrafish, for example, having six melanocortin receptors, with two copies of the melanocortin MC(5) receptor, while pufferfish have 4 receptors with no melan...