Secretin Peptide

Stimulating pancreatic juice secretion is the most core and primary physiological function of Secretin Peptide, as well as its most critical role in maintaining the steady state of the digestive system. This function is highly specific and precisely regulated. Unlike other digestive polypeptides, it acts directly on the exocrine pancreas, and its regulatory effect is highly adapted to the body's digestive needs, serving as an important guarantee for the digestion and absorption of nutrients such as fats and proteins.

Its mechanism of action is clear and efficient: when food enters the duodenum, especially when acidic chyme (pH＜4.5) stimulates the S cells on the intestinal mucosa, the S cells secrete a large amount of it. After entering the blood circulation, this peptide can rapidly and specifically bind to secretin receptors on the surface of ductal epithelial cells in the exocrine pancreas, activate downstream signaling pathways, and then initiate the massive secretion of pancreatic juice.

In physiological scenarios, this function has extremely strong adaptability: when there is excessive gastric acid in the duodenum, the secretion of it increases significantly, stimulating the pancreas to secrete a large amount of bicarbonate, which rapidly neutralizes the gastric acid entering the duodenum and adjusts the intestinal pH to a suitable range of 7.0-8.0. This avoids the corrosion and damage of the duodenal mucosa by acidic substances and reduces the risk of gastritis and duodenal ulcer. Meanwhile, the water in pancreatic juice can dilute chyme, facilitating the diffusion of nutrients and the action of digestive enzymes.

Its mechanism of action is both related to and different from the regulation of pancreatic juice secretion: The product also acts on target organs through the blood circulation, but it binds to specific receptors on the surface of hepatic bile duct epithelial cells instead of pancreatic receptors. After binding, it can activate the secretory function of bile duct epithelial cells, mainly promoting the secretion of bicarbonate and water in bile, while having no obvious effect on the secretion of core components such as bile salts and cholesterol in bile. This regulatory characteristic ensures the functional integrity of bile and avoids disorder of bile components.

In terms of physiological function, the core value of this effect lies in assisting fat digestion: the main function of bile is to emulsify fats, decomposing macromolecular fat particles into small molecular fat droplets to facilitate the action of pancreatic lipase, thereby promoting fat digestion and absorption. After Secretin Peptide promotes bile secretion, it can increase the total amount and fluidity of bile, raise the concentration of bile in the intestinal tract, and enhance the fat emulsification effect-this is particularly suitable for the digestive needs after the intake of high-fat foods, reducing indigestion symptoms such as abdominal distension, diarrhea and steatorrhea caused by insufficient fat emulsification.

In clinical application, this function can be used for the auxiliary treatment of diseases related to insufficient bile secretion, such as chronic hepatitis and abnormal bile secretion after biliary obstruction surgery. Exogenous supplementation of it can stimulate the liver to secrete a sufficient amount of bile, improve fat digestion and absorption disorders, and relieve symptoms such as anorexia and abdominal distension in patients.

Inhibiting gastric acid secretion is the core function of it in regulating the acid-base balance of the gastrointestinal tract. Together with the above two functions, it forms a "triple protective barrier" of the digestive system. Its mode of action is indirect regulation: unlike polypeptides or drugs that directly inhibit gastric acid secretion, it achieves gastric acid secretion inhibition by regulating the release of gastrin. With a mild and reversible effect, it can precisely adapt to the physiological rhythm of the body's digestion, avoid digestive dysfunction caused by excessive inhibition of gastric acid, and highlight the advantages of specificity and safety in its polypeptide regulation.

Its specific mechanism of action is as follows: The product itself does not act directly on parietal cells (the main cells secreting gastric acid), but inhibits the secretion of gastrin by G cells in the gastric antrum through a negative feedback regulatory mechanism. Gastrin is the core hormone promoting gastric acid secretion and can directly stimulate parietal cells to secrete hydrochloric acid. When the secretion of it increases, it specifically inhibits the activity of G cells, reduces the release of gastrin, thereby indirectly inhibiting the gastric acid secretion of parietal cells, lowering the concentration of hydrochloric acid in the stomach, and maintaining the acid-base balance of the stomach.