Secretin stimulates the secretion of bicarbonate by the pancreas and inhibits the gastrin and acid production in the stomach. It also potentiates the release of digestive enzymes from the pancreas triggered by cholecystokinin.
CAT No: 10-101-99
CAS No:17034-35-4 (net)
Synonyms/Alias:RG 1068; RG1068; RG-1069; Secretin
Secretin (porcine) Hydrochloride is a peptide hormone derived from the porcine pancreas, widely recognized for its role in modulating gastrointestinal physiology and serving as a valuable research tool in the study of digestive processes. Characterized by its high sequence homology to human secretin, this compound is frequently utilized in experimental settings to investigate the regulatory mechanisms of pancreatic secretion, gastric acid inhibition, and bile flow. The hydrochloride salt form enhances its solubility and stability, making it well-suited for a variety of in vitro and in vivo applications. Researchers appreciate its ability to reliably trigger specific biological responses, enabling detailed analysis of hormone-receptor interactions and downstream signaling pathways in the context of gastrointestinal function.
Gastrointestinal Physiology Research: Secretin (porcine) Hydrochloride is extensively used to elucidate the complex signaling pathways that control the secretion of bicarbonate-rich fluids from the pancreas and bile ducts. By stimulating the secretin receptor on target cells, it initiates a cascade involving cyclic AMP and protein kinase A, ultimately leading to increased secretion of bicarbonate and water. This property makes it a preferred tool for dissecting the molecular underpinnings of exocrine pancreatic function, allowing scientists to better understand how the body maintains pH balance and protects the intestinal mucosa from gastric acid.
Hormone-Receptor Interaction Studies: The peptide's structural similarity to endogenous secretin enables precise mapping of receptor binding sites and the investigation of ligand specificity. Researchers utilize it in cell-based assays to analyze the binding kinetics and activation profiles of secretin receptors, contributing to the development of selective agonists or antagonists for pharmacological research. This facilitates a deeper understanding of G protein-coupled receptor (GPCR) signaling, which is pivotal in numerous physiological and pathological processes.
Pharmacological Screening: Secretin analogs, including porcine-derived hydrochloride, are commonly employed in high-throughput screening platforms to assess the efficacy of novel compounds targeting the secretin receptor pathway. By providing a consistent and reproducible stimulus, it allows for the evaluation of candidate molecules' modulatory effects on receptor activity, which is essential for advancing drug discovery efforts focused on gastrointestinal disorders and metabolic regulation.
Signal Transduction Analysis: In cellular and molecular biology laboratories, Secretin (porcine) Hydrochloride serves as a model agonist for dissecting intracellular signaling mechanisms. Its well-characterized mode of action makes it ideal for experiments aimed at tracking second messenger dynamics, such as cAMP production, and for studying downstream events like gene expression changes or enzyme activation. These insights are instrumental in unraveling the broader physiological consequences of secretin signaling across different tissue types.
Comparative Endocrinology: The use of porcine secretin hydrochloride extends to comparative studies that explore evolutionary conservation and species-specific differences in hormone function. By comparing responses in various animal models, researchers can identify conserved motifs in secretin-receptor interactions and gain perspective on the adaptation of gastrointestinal regulatory systems across mammals. Such studies not only enhance our understanding of basic biology but also inform translational research by highlighting relevant similarities and differences between model organisms and humans.
Metabolic Regulation Investigations: In metabolic research, Secretin (porcine) Hydrochloride is employed to probe its influence on energy homeostasis and nutrient absorption. Studies have demonstrated that secretin can modulate hepatic glucose output, lipid metabolism, and even appetite-regulating pathways. By leveraging this peptide in controlled experimental settings, scientists are able to dissect the multifaceted roles it plays in coordinating digestive and metabolic responses to nutrient intake. Collectively, these diverse applications underscore the versatility and scientific value of Secretin (porcine) Hydrochloride in advancing our understanding of gastrointestinal physiology, endocrinology, and metabolic regulation.
Gastric acid secretion is under nervous and hormonal control. Gastrin, the major circulating stimulus of acid secretion, probably does not stimulate the parietal cells directly but acts to mobilize histamine from the ECL cells in the oxyntic mucosa. Histamine stimulates the parietal cells to secrete HCl. The gastrin-ECL cell pathway has been investigated extensively in situ (gastric submucosal microdialysis), in vitro (isolated ECL cells) and in vivo (intact animals). Gastrin acts on CCK2 receptors to control the synthesis of ECL-cell histamine, accelerating the expression of the histamine-forming enzyme histidine decarboxylase (HDC) at both the transcription and the translation/posttranslation levels. Depletion of histamine by alpha-fluoromethylhistidine (an irreversible inhibitor of HDC) prevents gastrin-induced but not histamine-induced gastric acid secretion. Acute CCK2 receptor blockade inhibits gastrin-evoked but not histamine-induced acid secretion. Studies both in vivo/in situ and in vitro have suggested that while acetylcholine seems capable of activating parietal cells, it does not affect histamine secretion from ECL cells. Unlike acetylcholine, the neuropeptides pituitary adenylate cyclase-activating peptide and vasoactive intestinal peptide mobilize ECL-cell histamine. Whether vagally stimulated acid secretion reflects an effect of the enteric nervous system on the ECL cells (neuropeptides) and/or a direct one on the parietal cells needs to be further investigated.
Lindström, E., Chen, D., Norlén, P., Andersson, K., & Håkanson, R. (2001). Control of gastric acid secretion: the gastrin-ECL cell-parietal cell axis. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 128(3), 503-511.
Our understanding of secretin and pancreatic secretions has developed. However, the salient findings of Bayliss and Starling concerning secretin have stood the test of time. Thus secretin is recognized as the key pathway mediating a now classical negative feedback reflex. Acidic chyme, emptying from the stomach, stimulates upper small intestinal mucosal S cells to release secretin. Secretin stimulates the flow of a bicarbonate-rich pancreatic secretion which empties into the duodenum, thus neutralizing the acid chime and removing the stimulus for secretin release. Of wider significance, the concept of hormonal regulation and the definition of a hormone basically remain to this day as originally outlined in Starling's Croonian Lectures.
Hirst, B. H. (2004). Secretin and the exposition of hormonal control. The Journal of physiology, 560(2), 339-339.
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