نتایج جستجو برای: pineal gland hormone
تعداد نتایج: 210100 فیلتر نتایج به سال:
Melatonin is a natural hormone produced by the pineal gland and derivative of serotonin. One key properties melatonin its chronobiological ability, realized multilevel synchronization biological processes. Physiologically, secretion increases at night decreases in morning. At present, role regulation sleep, circadian rhythms, adaptation body to rapid change time zones has been proven. With decr...
It is well known that the pineal gland hormone melatonin has a direct effect on pigment dispersion in amphibian melanocytes. This pineal hormone has also been reported to influence pituitary melanocyte-stimulating hormone (MSH) activity in the rat. Melatonin is formed from serotonin (5-hydroxytryptamine) in two metabolic steps: first, serotonin is enzymatically metabolized by N-acetyltransferas...
Living organisms have multiple biological rhythms. Some of these rhythms are endogenous and some are under the influence of light and dati cydes during 24-hours. Nowadays periodic changes in melatonin secretion from pineal gland and changes in N-acetyl transferase (NAT) activity which influence the melatonin secretion rate has been acknowledged as a basic rhythm. In this study NAT activity in p...
In mammals, light information received by the eyes is transmitted to the pineal gland via the circadian pacemaker, i.e., the suprachiasmatic nucleus (SCN). Melatonin secreted by the pineal gland at night decodes night length and regulates seasonal physiology and behavior. Melatonin regulates the expression of the β-subunit of thyroid-stimulating hormone (TSH; Tshb) in the pars tuberalis (PT) of...
nowadays immunochemical techniques have played a very important and valuable role in quantitative and qualitative assays of liquid compounds of the body. producing antibody against immunogenes is the first step to make immunochemical kits. in this study production and purification of polyclonal antibody against melatonin has been considered. this hormone which has several important functions in...
Melatonin a hormone is major product of the pineal gland. Alprazolam an anti-anxiety drug that belongs to benzodiazepines category. The quantity alprazolam and melatonin had been calculated by use regression equation responses were measured at 277 nanometers wavelength using above-mentioned conditions RP-HPLC simultaneous estimation has developed method determined for validation. was estimated ...
Melatonin, a pineal hormone, because of its wide activity spectrum, is a subject of much current interest for biologists and physicians. It has been demonstrated that pineal gland is not an exclusive source of melatonin synthesis. Melatonin synthesis has been found in different sites of the organism, and a major source of extrapineal melatonin is the gastrointestinal tract. The role of melatoni...
The pineal gland plays an essential role in vertebrate chronobiology by converting time into a hormonal signal, melatonin, which is always elevated at night. Here we have analyzed the rodent pineal transcriptome using Affymetrix GeneChip(R) technology to obtain a more complete description of pineal cell biology. The effort revealed that 604 genes (1,268 probe sets) with Entrez Gene identifiers ...
In order to examine the effect of exogenous melatonin on selected blood indices, dairy goats were given pineal gland hormone at a dose of 0.1 mg/kg body weight. Next, one and four hours after the melatonin had been administered, blood samples were collected from the goats in the control and treated groups in order to determine the levels of glucose, total cholesterol, triacyloglycerides, free f...
Introduction: Melatonin is a hormone secreted from the pineal gland and plays an important role in regulating the brain functions. This hormone with antioxidant activity supports the body against internal and external damaging factors. Melatonin reduces the production of free radicals by preserving mitochondrial homeostasis, and contributes to ATP synthesis in mitochondria. Reduction of melaton...
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