vasoactive-intestinal-peptide and Precancerous-Conditions

Topics: alpha-Fetoproteins; Amines; Animals; Bombesin; Bronchi; Calcitonin; Calmodulin; Carcinoembryonic Antigen; Carcinoma in Situ; Carcinoma, Bronchogenic; Chorionic Gonadotropin; Cytoskeletal Proteins; Esophageal Neoplasms; Glycogen; Growth Hormone; Hormones; Humans; Intestinal Neoplasms; Lung Neoplasms; Parathyroid Hormone; Physalaemin; Placental Lactogen; Precancerous Conditions; Somatostatin; Vasoactive Intestinal Peptide

Topics: Adenoma, Islet Cell; Cholecystokinin; Gastric Juice; Gastrins; Gastrointestinal Hormones; Glucagon; Humans; Neoplasms; Pancreatic Neoplasms; Paraneoplastic Endocrine Syndromes; Peptides; Precancerous Conditions; Secretin; Somatostatin; Stomach Neoplasms; Vasoactive Intestinal Peptide; Zollinger-Ellison Syndrome

Topics: Acute Kidney Injury; Adenoma, Islet Cell; Adolescent; Adult; Aged; Carcinoid Tumor; Child; Dehydration; Female; Gastric Inhibitory Polypeptide; Gastrins; Gastrointestinal Hormones; Gastrointestinal Neoplasms; Glucagon; Humans; Hyperplasia; Hypokalemia; Insulin; Insulin Secretion; Male; Middle Aged; Pancreatic Neoplasms; Paraneoplastic Endocrine Syndromes; Precancerous Conditions; Serotonin; Somatostatin; Syndrome; Vasoactive Intestinal Peptide; Zollinger-Ellison Syndrome

To explore the relationship between precancerous lesions of gastric antrum and substance P (SP) , vasoactive intestinal peptide ( VIP) , calcitonin gene-related peptide (CGRP), and the therapeutic mechanism of Zu' ai Weitai Granule (ZWG) , a TCM preparation.. The rat model of precancerous lesions of gastric carcinoma was induced by the combined method of N-methyl N' -nitrosoguani-dine (MNNG) and mechanical injury on gastric mucosa. The pathologic morphological changes of gastric mucosa were observed after prophylactic and therapeutic administration of ZWG. In the meantime,the changes in SP, VIP and CGRP contents were determined by immunohistochemical staining.. The contents of SP and CGRP in gastric antrum were obviously improved in the ZWG group when compared with those in the control group (P <0. 05). There was no significant difference in VIP content between the two groups (P >0. 05).. ZWG could improve SP, VIP, and CGRP contents in rats' gastric antrum either as prophylactic administration or therapeutic administration.

Topics: Animals; Antineoplastic Agents, Phytogenic; Calcitonin Gene-Related Peptide; Carcinoma; Drugs, Chinese Herbal; Precancerous Conditions; Pyloric Antrum; Rats; Stomach Neoplasms; Substance P; Vasoactive Intestinal Peptide

The enteric nerve plexus in the colon was investigated in rats with chemically induced colonic adenocarcinoma. Tissue specimens from the colons of four group rats, namely controls, treated animals without development of colonic macro- or microscopic changes, rats with dysplasia and lymphoid hyperplasia, and rats with colonic adenocarcinoma were studied using immunocytochemistry, and quantified by computerized image analysis. No morphometeric changes were found in the treated rats regarding the myenteric and submucosal ganglia, with the exception of nitric oxide synthase (NOS), where the number of nerve cell bodies/ganglia was reduced in the myenteric ganglia in rats with both lymphoid hyperplasia and dysplasia, and carcinoma. The relative volume density of protein gene product (PGP) 9.5-immunoreactive (IR) nerve fibres was higher in the muscularis propria in rats with lymphoid hyperplasia and dysplasia, and carcinoma. However the relative volume density of PGP 9.5-IR nerve fibres was higher in the submucosa in rats with carcinoma only. The relative volume density of substance P- and VIP-IR nerve fibres was significantly higher in the muscularis propria in rats with colonic carcinoma. The relative volume density of NOS-IR nerve fibres was significantly decreased in both muscularis propria and submucosa in rats with lymphoid hyperplasia and dysplasia, and carcinoma. These findings imply that regulatory signals of the enteric innervation may be involved in the pathogenesis of colorectal cancer.

Topics: Adenocarcinoma; Animals; Colon; Colonic Neoplasms; Enteric Nervous System; Immunohistochemistry; Male; Nerve Fibers; Nerve Tissue Proteins; Nitric Oxide; Precancerous Conditions; Rats; Rats, Sprague-Dawley; Substance P; Thiolester Hydrolases; Ubiquitin Thiolesterase; Vasoactive Intestinal Peptide

The growth of pancreatic cancers may be influenced by certain gut peptides. However, the alteration of gut peptide receptors in the progress of pancreatic carcinogenesis is largely unknown. With storage phosphor autoradiography, this study visualized and characterized receptors for cholecystokinin (CCK), somatostatin (SST), bombesin (BBS), secretin and vasoactive intestinal peptide (VIP) in pancreata of control hamsters (n = 7) and pancreatic preneoplastic lesions (n = 10) or adenocarcinomas (n = 10) of N-nitrosobis(2-oxopropyl)amine (BOP)-treated hamsters. The specific CCK-A and secretin receptors expressed in normal pancreata were markedly reduced in pancreatic preneoplastic lesions and absent in adenocarcinomas. In the development of pancreatic tumours, the subgroup of SST receptors did not change, but both the affinity and binding capacity declined. In comparison with the binding of VIP to normal pancreata, specific VIP binding was significantly lower in preneoplastic lesions and almost absent in pancreatic adenocarcinomas. No specific binding for BBS was detected in normal pancreas or (pre)neoplastic lesions of hamster pancreas. The reduction or absence of receptors for CCK, secretin, SST and VIP in hamster pancreas with the progress of carcinogenesis suggests that in BOP-treated hamsters, pancreatic adenocarcinomas have, to a large extent, lost the hormone-dependent characteristics of the original tissue.

Topics: Adenocarcinoma; Animals; Carcinogens; Cholecystokinin; Cricetinae; Mesocricetus; Nitrosamines; Pancreas; Pancreatic Neoplasms; Precancerous Conditions; Receptors, Cholecystokinin; Receptors, G-Protein-Coupled; Receptors, Gastrointestinal Hormone; Receptors, Somatostatin; Receptors, Vasoactive Intestinal Peptide; Secretin; Somatostatin; Vasoactive Intestinal Peptide