Overview
Ghrelin is a 28-amino acid peptide hormone primarily produced by the stomach. It was discovered in 1999 and is known for its role in stimulating appetite and regulating energy balance. Ghrelin acts on the hypothalamus to increase hunger and on the pituitary gland to stimulate the release of growth hormone. Research has shown that ghrelin levels fluctuate throughout the day, peaking before meals and decreasing after eating. This hormone is also involved in various physiological processes, including glucose metabolism, cardiovascular function, and gastrointestinal motility. Its unique structure and function make it a significant focus in endocrinology and metabolic research.
Physical and Chemical Properties
Ghrelin is a relatively small peptide with a molecular weight of approximately 3314.9 g/mol. It is soluble in water and acetic acid, making it suitable for various laboratory applications. The hormone is typically stored at -20°C to maintain stability, as it can degrade at higher temperatures. The peptide's structure includes an octanoyl group attached to the third serine residue, which is essential for its biological activity. This acylation allows ghrelin to bind effectively to its receptor, the growth hormone secretagogue receptor (GHS-R). Understanding these properties is crucial for researchers working with ghrelin in clinical or experimental settings.
Main Applications
Ghrelin has significant applications in medical research, particularly in studies related to obesity, cachexia, and growth hormone deficiencies. It is used to investigate mechanisms of appetite regulation and potential treatments for eating disorders. Additionally, ghrelin's role in stimulating growth hormone release makes it valuable in endocrine research. In clinical settings, ghrelin analogs are being explored for their potential to treat conditions like anorexia and muscle wasting diseases. The hormone's effects on metabolism and energy balance also make it a candidate for addressing metabolic syndromes. These applications highlight ghrelin's importance in both research and therapeutic development.
Safety and Storage
Ghrelin should be handled with care to avoid contamination or degradation. Researchers should wear appropriate personal protective equipment, including gloves and lab coats, when working with the peptide. Proper storage at -20°C in a dry, dark environment is essential to maintain its stability and efficacy. Avoid repeated freeze-thaw cycles, as this can reduce the peptide's activity. Solutions of ghrelin should be prepared fresh or stored in aliquots to minimize degradation. These precautions ensure the integrity of the hormone for experimental and clinical use.
B2B Procurement Guide
When procuring ghrelin for research or clinical use, it is important to source from reputable suppliers who provide detailed certificates of analysis. These certificates should include information on purity, molecular weight, and biological activity. Buyers should also verify storage and shipping conditions to ensure the peptide's stability upon arrival. Price ranges for ghrelin can vary widely depending on purity and quantity, with research-grade options typically costing between $500 and $1000 per mg. Bulk purchases may offer cost savings, but buyers should confirm the supplier's ability to meet large-scale demand without compromising quality. Establishing long-term relationships with reliable suppliers can streamline procurement processes.
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