Vip issecreted bywhich cells Vasoactive intestinal peptide (VIP) is a crucial neuropeptide with widespread physiological roles, and understanding where it is produced and secreted is key to grasping its diverse functions. While often associated with the gastrointestinal tract, VIP is secreted by a variety of cell types and tissues throughout the body, acting as a signaling molecule in both the nervous and endocrine systems.Vasoactive Intestinal Peptide Stimulates Hormone Release ... Its production spans numerous tissues of vertebrates, highlighting its fundamental importance in biological regulation.
Vasoactive intestinal peptide (VIP) is synthesized and secreted by a diverse array of cells and tissues. Its presence is not confined to a single organ system but rather distributed across multiple locations, underscoring its pleiotropic nature.
Neural and Hypothalamic Sources:
Within the central nervous system, VIP is notably synthesized and secreted by neurons in the hypothalamus, particularly in the suprachiasmatic nuclei (SCN)Vasoactive intestinal peptide (VIP) is a 28-amino-acid neuropeptide originally isolated fromporcine small intestine. VIP belongs to a family of neuropeptides .... This production in the SCN is linked to circadian rhythms.Detectingvasoactive intestinal polypeptide-producing tumors in patients with chronic diarrheal diseases. Furthermore, VIP is found in neurons within the brain, adrenal glands, and the anterior pituitary.VIP derived from pigs, cows, and rats have the same structure. Furthermore, VIP released from endocrine cells in the central nerve, peripheral nerve, digestive ... It's also secreted by peripheral nerves.2018年3月9日—Once secreted from the pituitary gland, prolactin can increase many behaviors such as parental care and aggression. In certain species of birds ...
Gastrointestinal Tract Origins:
The gastrointestinal system is a significant source of VIP.In the digestive system, VIP induces smooth muscle relaxation, stimulatessecretionof water into pancreatic juice and bile, and inhibits gastric acidsecretion... It is secreted by endocrine cells throughout the intestinal tract, including the small intestine, where it was originally isolated from porcine sources. VIP plays a vital role in regulating intestinal secretion of electrolytes and water, as well as stimulating bile secretion from cholangiocytes and influencing pancreatic hormone release.
Immune System Involvement:
Emerging research indicates that VIP is also produced by immune cells. This includes various types of immune cells such as T cells, B cells, mast cells, and eosinophils, often stimulated by factors like lipopolysaccharide (LPS)作者：KS Lam·1991·被引用次数：77—Vasoactive intestinal peptide (VIP)is synthesized and secreted by the hypothalamus and anterior pituitaryand that it participates in the regulation of .... This suggests a role for VIP in modulating immune responses and inflammation.Vasoactive Intestinal Peptide - Fahrenkrug - 1989
Other Vertebrate Tissues:
Beyond the nervous and digestive systems, VIP is produced in many other tissues of vertebrates. These include the pancreas, neocortex, and even cardiac tissues. This widespread distribution ensures that VIP can exert its effects locally and systemically, impacting a broad range of physiological processes.
The secretion of vasoactive intestinal peptide (VIP) into the circulatory system or extracellular space allows it to act on target organs and cells, mediating a variety of physiological functions. Its roles are extensive and often context-dependentVasoactive intestinal peptide in the regulation of renin ....
Cardiovascular Effects:
VIP is known to have significant cardiovascular effects, primarily through vasodilation. This action helps to regulate blood pressure and blood flow to various organs.Recent advances in vasoactive intestinal peptide physiology ...
Gastrointestinal Regulation:
In the digestive system, VIP is a potent regulator. It stimulates the secretion of water and electrolytes in the intestines, promotes bile secretion, and inhibits gastric acid secretion. It also influences the smooth muscle activity within the gastrointestinal tract, contributing to motility.
Hormonal Modulation:
VIP plays a role in the endocrine system by stimulating the secretion of various pituitary hormones, including prolactin (PRL), and influencing the release of insulin, glucagon, and somatostatin from the pancreas. It can also act as a renin-stimulating factor, impacting the regulation of blood pressure through the renin-angiotensin systemVasoactive intestinal peptide.
Neural Signaling:
As a neuropeptide, VIP acts as a neurotransmitter or neuromodulator in the central and peripheral nervous systems. It has been implicated in processes such as sleep regulation, sexual behavior, and memory. Its interaction with acetylcholine, for instance, highlights its role in coordinating secretion and vasodilation作者：M Iwasaki·2019·被引用次数：224—VIP is produced byimmune cells including T cells, B cells, mast cells, and eosinophilsstimulated by lipopolysaccharide (LPS) and ....
Immune Modulation:
Given its production by immune cells, VIP is involved in immune regulationReview Stimulation of intestinal secretion by vasoactive .... It can modulate inflammatory responses and influence the function of immune cells, suggesting a link between the nervous and immune systems.
While VIP is a normal physiological substance, its overproduction can occur in certain pathological conditions. Specifically, peptides secreted by some tumors, especially certain pancreatic islet-cell tumors, can include VIP. The detection of vasoactive intestinal polypeptide-producing tumors is often associated with chronic diarrheal diseases, underscoring the critical role of VIP in intestinal function.
In conclusion, vasoactive intestinal peptide (VIP) is a remarkably versatile molecule secreted by a wide array of cells and tissues, from neurons in the hypothalamus and immune cells to endocrine cells in the gut. Its secretion enables it to perform vital functions in regulating cardiovascular activity, gastrointestinal processes, hormonal balance, and immune responses, demonstrating its central role in maintaining homeostasis.
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