Peptideyy3 36 Peptide YY (PYY) is a crucial gut hormone that plays a significant role in regulating appetite, food intake, and digestive functionsPeptide YY (PYY). Released primarily from specialized L-cells in the ileum and colon in response to feeding, PYY acts as a satiety signal, helping to prevent excessive energy consumption. This 36-amino acid polypeptide is a key player in the complex interplay between the gut and the brain, influencing various physiological processes beyond just hunger.
The primary and most well-documented function of Peptide YY is its potent anorexigenic effect, meaning it suppresses appetitePeptide YY acts as a neuropeptide Y receptor Y2 agonist,is released in response to feeding, and is associated with appetite saiety.. After a meal, PYY is released into the bloodstream and travels to the brain, where it interacts with specific receptors, particularly neuropeptide Y receptors in the hypothalamus. These interactions signal to the brain that the body is full, thereby reducing hunger and inhibiting feeding stimuli. Studies have shown that administering PYY can significantly decrease food intake and promote a feeling of fullness, making it a compound of interest in the study of obesity and weight management作者：NT Nguyen·2025—Notably, evidence indicates thatPYY interacts with multiple neuropeptide Y receptors(Y1, Y2, Y4, Y5). This peptide primarily modulates appetite and energy .... The PYY (3-36) variant, a specific fragment of the hormone, has been particularly evaluated for its therapeutic potential in treating obesity due to its strong appetite-suppressing capabilities.作者：SJ Persaud·2014·被引用次数：109—We have recently identified a new role for thegut hormone peptide YY (PYY) and the neuropeptide Y (NPY) receptor systems in the control of beta cell survival.
While appetite regulation is its most prominent role, Peptide YY's influence extends to other vital bodily functions. It is known to:
* Inhibit Pancreatic Secretion: PYY plays a role in modulating the exocrine secretion of the pancreas, which is involved in digestion.
* Regulate Gut Motility: The hormone can affect the movement of food through the gastrointestinal tract, influencing gut motility in both the small and large intestines.
* Influence Insulin Secretion: Emerging research suggests PYY may also have a role in regulating insulin secretion, a critical aspect of glucose metabolism and a factor in conditions like Type 2 Diabetes.PYY is anorexigenic and inhibits feeding stimuli after a meal, thus preventing excessive energy intake.
* Impact Immune Function: There is growing evidence pointing towards a role for PYY and related neuropeptides in modulating immune responses within the gut.
* Vasoconstrictory Actions: PYY can exert a vasoconstrictory effect, meaning it can narrow blood vessels.
Peptide YY is closely related to Neuropeptide Y (NPY) and belongs to the same peptide family. NPY is also a potent regulator of appetite, but it typically acts as a stimulant for feeding. PYY and NPY share structural similarities and interact with a common set of receptors, known as neuropeptide Y receptors (Y1, Y2, Y4, Y5)PYY - Peptide YY - Homo sapiens (Human) | UniProtKB. While PYY generally opposes the effects of NPY by suppressing appetite, their intricate relationship and interactions with these receptors are complex and continue to be an active area of research. PYY's specific action as a neuropeptide Y2 receptor agonist is a key mechanism by which it exerts its anorexigenic effects.
Peptide YY is predominantly produced by L-cells, a type of enteroendocrine cell found in the lining of the gastrointestinal tract. These cells are particularly concentrated in the distal parts of the small intestine (ileum) and the large intestine (colon), with higher concentrations often found in the terminal ileum and rectum. While primarily a gut hormone, PYY also circulates in the bloodstream and can act on the central nervous system to influence appetite and satietyPeptide YY (3-36) (porcine).
Peptide YY is a multifaceted gut hormone with a primary role in signaling satiety and regulating food intake. Its release in response to meals helps prevent overeating and contributes to energy homeostasisPeptide YY - an overview. Beyond appetite control, PYY influences pancreatic secretion, gut motility, and potentially insulin secretion and immune function. Its close relationship with Neuropeptide Y and its interaction with neuropeptide Y receptors highlight the complex signaling pathways within the gut-brain axis.PeptideYY (PYY) is a gut hormone that regulates appetite and inhibits pancreatic secretion.PeptideYY (PYY) can mediate its effects through the NeuropeptideY... As research continues, a deeper understanding of Peptide YY's various functions may unlock new therapeutic avenues for metabolic disorders and digestive health.
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