peptide yy secreted by peptides - Peptide YYSupplements porcine upper intestinal Peptide YY: Understanding Its Secretion and Role in the Gut

Peptide YYSupplements Peptide YY (PYY) is a crucial gut hormone primarily secreted by enteroendocrine L-cells, predominantly found in the distal ileum and colon. Its release is a direct response to the presence of nutrients, particularly fats and carbohydrates, within the gastrointestinal tract. This nutrient-dependent secretion mechanism positions PYY as a key player in regulating appetite and digestive processes, often referred to as the "ileal brake." Understanding where and why peptide YY is secreted is fundamental to grasping its physiological functions.PYY secretion is influenced by eating. Its levels are lowest in the fasting state and rise rapidly, in 15 minutes or less after a meal, to reach a plateau ...

The L-Cells: Primary Source of Peptide YY

The vast majority of PYY originates from specialized cells known as L-cells. These enteroendocrine cells are strategically located in the lining of the lower gastrointestinal tract, with particularly high concentrations found in the ileum and colon. While some L-cells are also present in the small intestine, their abundance and activity are most pronounced in the distal regions. The release of PYY from these L-cells is triggered by the ingestion of food, especially meals rich in fats and carbohydrates, which stimulate these cells to excrete PYY into the bloodstream.Peptide YY is a short (36-amino acid) peptide released fromcells in the ileum and colon in response to feeding. In the blood, gut, and other elements of ... This postprandial release is a rapid process, with PYY levels rising significantly within minutes of a meal.

Triggers for Peptide YY Secretion

The primary trigger for PYY secretion is the act of eating作者：BH Upchurch·1996·被引用次数：59—The hormone peptide YY is produced byendocrine cells in the pancreas, ileum and colon. We have previously shown that peptide YY is coexpressed in all four .... As food enters the digestive system, it signals the L-cells to release PYY.The role of peptide YY in appetite regulation and obesity - Karra Specifically, the presence of digested nutrients, such as fatty acids and carbohydrates, in the lumen of the distal small intestine and colon acts as a direct stimulus作者：CW le Roux·2005·被引用次数：144—PYY is produced by the intestinal L-cellsand the highest tissue concentrations are found in distal segments of the gastrointestinal tract, although it is .... This response is highly coordinated; PYY levels are typically low during fasting states and increase markedly after food intake. Beyond macronutrients, other factors can influence PYY releaseThe role of peptide YY in appetite regulation and obesity - Karra. For instance, short-chain fatty acids (SCFAs), produced by gut bacteria, have been shown to strongly stimulate PYY production in the intestine.

PYY's Role in Appetite Regulation and Digestion

Once released into circulation, PYY exerts several physiological effects, most notably its influence on appetite and gastrointestinal motility. By acting on receptors in the brain, PYY signals satiety, helping to reduce food intake and promote feelings of fullness. This appetite-suppressing effect is a significant aspect of its role in energy balance. Furthermore, PYY plays a role in slowing down gastric emptying and reducing the secretion of pancreatic and gastric juices. This coordinated action helps to regulate the passage of food through the digestive tract, allowing for more efficient nutrient absorption and preventing an overload of the digestive systemPeptide YY (PYY) is a peptide hormone present in the brain andis released from the bowel in response to fat and carbohydrate in the small intestine..

Variations and Related Peptides

While PYY is the primary form discussed, it's worth noting that PYY exists in different forms, with PYY (1-36) being the main circulating peptidePYY shows an inhibitory action on contraction of the gastrointestinal tract and on secretion of pancreatic and gastric juice.PYY is released by taking diet.. Research also indicates that PYY is colocalized and cosecreted with other gut hormones, such as glucagon-like peptide-1 (GLP-1), from L-cells. This co-secretion suggests a coordinated regulatory network within the gut. Studies have also explored potential race-related differences in ghrelin and PYY levels in youth, highlighting ongoing research into the complex interplay of hormonal regulation and individual variability.作者：P Larraufie·2018·被引用次数：463—PYY production is highest inenteroendocrine cells located in the distal intestine, mirroring the sites where high concentrations of short chain ...