where is peptide yy produced endocrine L-cells of the distal ileum and colon - peptides-used-for-weight-loss-and-fitness PYY is released from the gut into the circulation Where is Peptide YY Produced? Unraveling the Origin of a Key Gut Hormone

where-should-you-inject-bpc-157-peptide Peptide YY (PYY), a crucial hormone involved in regulating appetite and digestion, originates primarily from specialized cells within the gastrointestinal tract. Understanding where PYY is produced offers valuable insights into its role in metabolic health and its potential implications for conditions like obesity and diabetes.

The predominant production site for Peptide YY is the L cells (intestinal endocrine cells) found in the distal portions of the small intestine, specifically the ileum, and the large intestine, including the colon作者：CW le Roux·2005·被引用次数：143—PYY is produced by the intestinal L-cellsand the highest tissue concentrations are found in distal segments of the gastrointestinal tract, although it is .... These endocrine L cells of the intestinal epithelium, particularly those located in the distal ileum and colon, are responsible for synthesizing and releasing this 36-amino acid peptide. Research indicates that PYY is coexpressed in these cells with other hormones like GLP-1 and enteroglucagon, suggesting a coordinated function in nutrient sensing and signalingPeptide YY.

While the vast majority of PYY is synthesized in the gut, scientific literature also points to its production in other locations. Early studies, for instance, involved the isolation of peptide YY from porcine intestinal extracts, highlighting its presence in animal models as well. Furthermore, some research has identified PYY as being produced by pancreatic endocrine cells, although this appears to be a less significant source compared to the intestinal L-cells. Demonstrating a broader presence, PYY has also been found to be produced by post-mitotic SkM tissue and expanding hMPCs, indicating potential roles beyond the digestive system.

The release of PYY into the bloodstream is largely dictated by nutrient intake. Indeed, PYY is released from the gut into the circulation in a nutrient-dependent manner. When food, particularly fats and carbohydrates, triggers the enteroendocrine cells, PYY is secreted. This postprandial release, occurring in response to feeding, is a key mechanism by which PYY communicates satiety signals to the brain, helping to regulate food intake作者：CW le Roux·2005·被引用次数：143—PYY is produced by the intestinal L-cellsand the highest tissue concentrations are found in distal segments of the gastrointestinal tract, although it is .... Conversely, PYY levels are low in the fasting state and rapidly increase after a meal.Peptide YY – Knowledge and References

The term "Peptide YY" itself, often abbreviated as PYY, derives from the presence of tyrosine residues at both the NH2 terminus and the C-terminus of the peptide. This specific amino acid sequence is critical for its biological activity. Two biologically active forms of PYY are recognized, with PYY(3-36) being a significant one, produced by the enzyme dipeptidyl peptidase-IV which hydrolyzes PYY at the Pro2–Ile3 bond of the NH2 terminus.

The significance of PYY extends to its role in appetite regulation and metabolism. Individuals with obesity have often been observed to have a deficiency in peptide YY (PYY), suggesting its potential contribution to weight management. The hormone made in the gut acts as an anorectic signal, promoting feelings of fullness and reducing appetite. This makes understanding the intricate production and release mechanisms of peptide YY crucial for developing therapeutic strategies for metabolic disorders.

In summary, Peptide YY is primarily produced by endocrine L cells located in the ileum and colon. While other sites of production exist, the intestinal L-cells are the main source, releasing this important peptide in response to food intake to help regulate satiety and gastrointestinal function. The continuous research into PYY and its functions underscores its vital role in maintaining metabolic balance.