abm-peptides The peptide hormone ghrelin is produced by specialized cells primarily located in the stomach作者：NA Tritos·2006·被引用次数：110—Ghrelin, a peptide hormone originally identified as the endogenous ligand of the growth hormone secretagogue receptor,is secreted primarily fromthe .... While the stomach is the main source, ghrelin is also synthesized in smaller amounts by other tissues, including the small intestine, pancreas, and even cardiomyocytes. This peptide hormone plays a crucial role in regulating appetite, energy homeostasis, and growth hormone release.
Ghrelin is famously known as the "hunger hormone" due to its potent stimulatory effect on appetite and feeding behavior. It is secreted in response to fasting and its levels rise before meals, signaling to the brain that it's time to eat.作者：SL Deschaine·2022·被引用次数：46—Ghrelin is primarily produced fromPD-1 cells (X/A-like cells in rodents) in the stomach and intestine but can also be produced in other tissues ... Conversely, ghrelin levels typically fall after a meal.Ghrelin is a 28 amino acid peptidepredominantly produced by the stomachthat has been discovered to be a natural ligand of the orphan growth hormone. Beyond its role in hunger, ghrelin is also a key regulator of growth hormone (GH) secretion by the anterior pituitary gland, a function that led to its initial identification as a growth hormone-releasing peptide.
The primary production site for ghrelin is the stomach, specifically by enteroendocrine cells known as P/D1 cells (or X/A-like cells in rodents)Ghrelin and the endocrine pancreas - PubMed. These cells are scattered throughout the lining of the stomach. However, research has revealed that ghrelin production is not exclusive to the stomachStructure, regulation and function of ghrelin - Oxford Academic. Substantial amounts of ghrelin are also produced by:
* Small Intestine: Enteroendocrine cells in the small intestine also contribute to circulating ghrelin levelsFrom “Hunger Hormone” to “It's Complicated”: Ghrelin ....
* Pancreas: The epsilon (ε) cells of the pancreas are another site of ghrelin synthesis.
* Other Tissues: While in smaller quantities, ghrelin has also been detected in tissues like the pituitary gland and cardiomyocytes.
Ghrelin's influence extends beyond just stimulating hunger and growth hormone release. Its functions are intricate and interconnected with various physiological processes:
* Energy Homeostasis: By promoting food intake and potentially influencing adiposity, ghrelin plays a significant role in maintaining the body's energy balance.
* Metabolism: Ghrelin is involved in regulating carbohydrate metabolism.
* Gut-Brain Axis: As a peptide hormone circulating in the bloodstream, ghrelin acts as a crucial link in the gut-brain axis, conveying signals about nutritional status from the digestive system to the central nervous system.
In summary, the peptide hormone ghrelin is predominantly produced by specialized cells within the stomach, earning it the moniker "hunger hormone.Ghrelin is produced mainly by thePD/D1 cells of the stomachbut is also present in other tissues, including the small intestine, hypothalamus, pancreas, ..." However, its synthesis is not limited to the stomach, with significant contributions from the small intestine and pancreas, and even minor production in other tissues.作者：F Broglio·2003·被引用次数：76—Ghrelin is a 28-amino-acid peptidepredominantly produced by the stomach, while substantially lower amounts derive from other tissues including the pancreas. This widespread production underscores ghrelin's critical and multifaceted roles in regulating appetite, energy balance, and growth hormone release, making it a vital player in overall physiological function.
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