Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P01350 (gastrin)
 9,683 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The long-acting somatostatin analogue SMS 201-995 was administered to a six-month-old infant with intractable diarrhea after failure of conventional treatment. During eight weeks of treatment, the secretory component of the diarrhea was positively influenced with a reduction of daily stool weight and stool sodium concentration. Plasma levels of growth hormone were markedly, and levels of insulin, IGF I, gastrin, pancreatic polypeptide, VIP, and neurotensin moderately decreased. Linear growth was also inhibited. The patient unexpectedly died from fulminant colitis at a time, when the dosage had been reduced from 18 to 3.5 micrograms/kg/day. The relationship, if any, between therapy with SMS 201-995 and the colitis remained unclear. It is concluded that SMS 201-995 can be effective in reducing secretory diarrhea in infants. However, further studies are necessary to assess the safety of its administration in this age group.
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PMID:Effects of the long-acting somatostatin analogue SMS 201-995 in an infant with intractable diarrhea. 284 5

The aim of this study was to determine the rate of circulating gastrointestinal hormones in pigs when pancreatic secretion was re-introduced or removed from the duodenal lumen. Permanent fistulas were fitted into the pancreatic duct and duodenum of 16 pigs, and catheters were introduced into the portal vein and a jugular vein as well. Plasma hormone content was determined at different times during two periods of 30 and 60 min each, when the juice was returned to the pigs; these two periods included a 120-min interval when the juice was not reintroduced into the intestinal lumen. When the pancreatic juice was not returned to the pigs, plasma secretin content rose significantly in the portal blood (+ 42.8% at min 15; +52.5% at min 30; +31% at min 60 and +27% at min 120) and in the peripheral blood (+36.4% at min 30; +18.9% at min 120) compared to the mean values recorded during intraduodenal re-introduction of the secretion. In parallel, the volume of juice secreted and protein output increased significantly but their concentration did not. When the pancreatic juice was removed the mean cholecystokinin level in the portal vein did not change significantly, except at min 30 when its value was 32% higher than the mean during the periods of restitution. Cholecystokinin in the peripheral blood was not affected by removing the pancreatic juice from the intestinal lumen. The mean plasma levels of gastrin, somatostatin, VIP and PP in the portal and peripheric blood were unaltered. These results suggest that in pigs secretin may have an important role in the regulation of pancreatic secretion by negative feedback.
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PMID:[Regulation of pancreatic secretion by negative feedback and blood gastrointestinal hormones in the pig]. 286 Jul 7

We have investigated in stimulated human pancreatic juice the presence of the following peptides: insulin, glucagon, gastrin, somatostatin, VIP and secretin. Collection of pancreatic juice (3 periods: 20 min each) was completed by endoscopic cannulation of the pancreatic duct during the infusion of secretin (0.5 U/kg/h) and cerulein (75 ng/kg/h) in 6 healthy volunteers. Pure pancreatic juice was recovered in the presence of kallikrein inhibitor (iniprol 8,000 U/ml) in refrigerated collection tubes (4 degrees C). The material was acidified, boiled for 5 min and centrifuged. Radioimmunoassays were performed on the supernatant solutions. The elution profiles on Sephadex G 25 gel filtration of the immunoreactivities were compared with standard samples of hormones, immuno-reactive insulin, glucagon and somatostatin were found in every sample: insulin was present at a constant level (50 microU/ml) during the three periods of collection; glucagon was encountered in large amounts in the first sample and decreased significantly during the subsequent periods; somatostatin which occurred at a low level during the first period was significantly increased in the following periods. Gastrin, VIP and secretin were undetectable or only inconstantly found in very small amounts. These results are in agreement with a two-directional secretion of the human pancreatic endocrine cells. The cellular origin and function of these exocrine secreted peptides need further studies.
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PMID:[Presence of hormonal polypeptides in the pure pancreatic secretion in man under stimulation by cerulein and secretin]. 286 46

Paraffin-embedded specimens from a total of 94 small-cell carcinomas of the lung (SCCL) were screened for immunoreactivity to nine different peptide hormones (ACTH, calcitonin, gastrin, glucagon, growth hormone, human chorion gonadotropin, insulin, somatostatin and vasoactive intestinal peptide, VIP) using an indirect immunoperoxidase technique with commercially available kits. Special attention was focused on the prognostic significance of the peptide immunoreactivity. A total of 32 carcinomas (34%) showed immunoreactivity to one or more peptide hormones, the cases with ACTH reactivity (24.5%) far outnumbering those with reactivity to calcitonin (1.1%), somatostatin (1.1%), VIP (3.3%) or multiple peptides (4.3%). The mean survival of the patients was 8.4 months, being shorter (7.3 months) for the SCCLs with peptide reactivity than for the nonreactive carcinomas (9.2 months). The most favorable survival was found in VIP-reactive tumors (20.5 months), and the worst (2.0 months) in cases reactive to multiple peptides. The results suggest that immunohistochemical screening of the SCCL biopsies for the peptide hormones might be of benefit in predicting the clinical outcome of the disease.
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PMID:Peptide hormone immunoreactivity and prognosis in small-cell carcinoma of the lung. 286 57

Twelve duodenal carcinoid tumours are presented, 4 of them located in the ampulla. Symptoms included the Zollinger-Ellison syndrome (4 patients), the carcinoid syndrome (1 patient), mechanical obstruction (3 patients), bleeding (1 patient) and abdominal pain (1 patient). Two further tumours were detected by chance. Three patients with the Zollinger-Ellison syndrome had additional endocrine tumours characteristic of the MEN I syndrome. In 2 of them the duodenal carcinoids were of very small size and were multiple. They were observed in close proximity to focal areas of endocrine cell hyperplasia. Immunohistochemical investigations showed gastrin and somatostatin to be the predominant polypeptide hormones produced by these tumours. No somatostatinoma syndrome was encountered. In half of our cases additional production of insulin, VIP or even calcitonin in smaller amounts was found. Two of our patients had cutaneous manifestations of von Recklinghausen's disease and in both of them the carcinoid was located in the ampulla. One of these patients also had a pheochromocytoma.
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PMID:Duodenal and ampullary carcinoid tumors. A report of 12 cases with pathological characteristics, polypeptide content and relation to the MEN I syndrome and von Recklinghausen's disease (neurofibromatosis). 286 9

Methanol extracted skins from 84 species of amphibia were screened, measuring by RIAs: gastrin-CCK, VIP, calcitonin, GIP, PP and motilin. G-CCK-like immunoreactivity was found in 97.6%; VIP-like immunoreactivity in 41%; CT-like immunoreactivity in 34%; GIP-like immunoreactivity in 10%; PP-like immunoreactivity in 40% and MT-like immunoreactivity in 60% of the samples. The use of a sequence-specific radioimmunoassay and of gel-chromatography confirmed the caerulein-CCK-8-like nature of the immunoreactive material. Detected amounts of the other peptides (VIP, CT, GIP, PP, MT) were too low for bioassay or chromatographic studies, thus leaving the question open if they are due to some kind of unspecific interferences or, most likely, to species-specificity differences of the used antisera.
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PMID:Peptides of the APUD system in amphibian skins. 287 Apr 72

The objective of the present study was to investigate whether gastrointestinal hormones can be released in response to low intensity afferent activation of the sciatic nerve. Experiments were performed on anaesthetized cats in which the sciatic nerve was stimulated electrically at 3 Hz, to V and 0.2 ms. Blood samples were collected in a peripheral vein and the plasma levels of somatostatin, gastrin, glucagon, insulin and VIP-like immunoreactivity (below referred to as somatostatin, gastrin, glucagon, insulin and VIP) were recorded by radioimmunoassay. Afferent stimulation of the sciatic nerve caused immediate (approximately 15 min long) changes of the levels of all the above mentioned peptides. Somatostatin, gastrin and glucagon levels rose significantly, whereas in the case of insulin and VIP a significant relationship between the effect of sciatic nerve stimulation and basal levels was established. Thus, insulin and VIP levels decreased when basal levels were high and increased when basal levels were low. The secretion of gastrointestinal and pancreatic hormones is in part regulated by the autonomic nervous system. It is suggested that afferent stimulation of the sciatic nerve causes a reflex activation of the vagal and/or the splanchnic nerves, which in turn affects the release rate of the above-mentioned hormones. In conclusion, these data show that the release of gastrointestinal hormones can be influenced by low intensity stimulation of the sciatic nerve. The physiological trigger of these responses may be touching of the skin.
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PMID:Influence on plasma levels of somatostatin, gastrin, glucagon, insulin and VIP-like immunoreactivity in peripheral venous blood of anaesthetized cats induced by low intensity afferent stimulation of the sciatic nerve. 287 95

Bombesin-like immunoreactivity (BLI) has been demonstrated in neurons of the gastrointestinal tract and gastric BLI secretion can be demonstrated in response to the classical neurotransmitter acetylcholine. Since structurally related peptides VIP, PHI and GRF have to be considered as peptidergic neurotransmitters it was of interest to determine their effect on gastric BLI secretion. Additionally, somatostatin (SLI) and gastrin secretion was examined. The isolated stomach of overnight fasted rats was perfused with Krebs-Ringer buffer via the celiac artery and the effluent was collected via the portal vein. The gastric lumen was perfused with isotonic saline at pH7 or pH2. All four peptides were tested at a dose of 10(-11) M and 10(-8) M at both pH levels and in addition the effect of VIP and PHI was examined at 10(-14) M and 10(-12) M during luminal pH2. At luminal pH7 VIP and PHI stimulated SLI release at 10(-8) M but had no effect on BLI or gastrin secretion. rGRF and hpGRF were both ineffective on SLI and gastrin release while rGRF inhibited and hpGRF stimulated BLI secretion. This effect was not dose related. At luminal pH2 all four peptides stimulated BLI secretion. Stimulation by PHI was already observed at a dose of 10(-14) M while VIP elicited a stimulatory effect at 10(-12) M. PHI at the two lowest concentrations of 10(-14) and 10(-12) M elicited a stimulation of SLI and gastrin release while the same doses of VIP and the higher doses of all four peptides had no effect on SLI and gastrin secretion at an acidic intraluminal pH.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Effect of vasoactive intestinal peptide, peptide histidine isoleucine and growth hormone-releasing factor-40 on bombesin-like immunoreactivity, somatostatin and gastrin release from the perfused rat stomach. 287 59

A large number of antisera mainly raised against mammalian hormones are tested immunocytochemically on the GEP-endocrine system of mouse and fish (Barbus conchonius). The endocrine pancreas of mouse and fish appeared to contain the same four endocrine cell types; insulin-, glucagon-, PP- and somatostatin-immunoreactive cells. In mouse about 13 GEP endocrine cell types are distinguished: 1. insulin-, 2. somatostatin-, 3. glucagon-, 4. PP-, 5. (entero)glucagon-/PP-like, 6. CCK-like, 7. substance P-, 8. neurotensin-, 9. VIP-, 10. gastrin-, 11. secretin-, 12. beta-endorphin-, 13. serotonin-immunoreactive cells. Based on this and a previous study at least 13 GEP endocrine cell types seems to be present in stomachless fish: 1-9 as described for mouse, 10. (entero)glucagon-like, 11. met-enkephalin, 12. VIP-like, 13. unspecific immunoreactive endocrine cells. Coexistence of glucagon and PP-like peptides is found in the gut and pancreas of mice and in the gut of B. conchonius. In mouse pancreas and fish gut, endocrine cells showing only PP- or glucagon-like immunoreactivity are found too. In mouse stomach some endocrine cells showing only PP-immunoreactivity are demonstrated. In the same region coexistence of C-t-gastrin- and FMRF-amide-immunoreactivity is found in endocrine cells. The importance of these phenomena are discussed. Enteric nerves immunoreactive with antisera raised against substance P and GRP are found in mouse, against somatostatin and met-enkephalin in both mouse and fish and against VIP in fish.
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PMID:Immunocytochemical identification and localization of peptide hormones in the gastro-entero-pancreatic (GEP) endocrine system of the mouse and a stomachless fish, Barbus conchonius. 287 13

Long-acting somatostatin analogues such as SMS 201-995 (Sandoz) are being evaluated in a wide range of clinical indications, including gut neuroendocrine tumours and acrogemaly. Long-term continuous SMS 201-995 treatment has achieved useful symptomatic improvement in diarrhoea in 4 patients with metastatic VIPomas who had relapsed following previous treatment. Clinical improvement has outlasted suppression of VIP secretion (suggesting an additional direct antisecretory action of SMS 201-995) and has occurred despite expansion of hepatic metastases. In 6 patients with tumours secreting gastrin and/or glucagon, secretion of these peptides was acutely inhibited by SMS 201-995. However, endocrine and clinical responses to chronic treatment have been less consistent. SMS 201-995 is active orally at doses of 4-8 mg and when given thrice-daily to 6 patients with active acromegaly, suppressed mean 24-h growth hormone levels by 51-88%. Despite significantly reduced plasma insulin concentrations, glucose tolerance did not deteriorate. SMS 201-995 was also effective in suppressing thyroid-stimulating hormone (TSH) and thyroid hormone secretion in a patient with mild thyrotoxicosis due to non-tumoural inappropriate TSH hypersecretion. In all cases SMS 201-995 treatment has been well tolerated and has few side-effects.
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PMID:Clinical evaluation of SMS 201-995. Long-term treatment in gut neuroendocrine tumours, efficacy of oral administration, and possible use in non-tumoural inappropriate TSH hypersecretion. 289 35


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