Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P20366 (substance P)
 21,176 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

To further elucidate the pathophysiological role of peptide hormones in duodenal ulcer (DU) disease, several endocrine, paracrine and neurocrine peptides were determined radioimmunologically in biopsies of gastroduodenal mucosa obtained endoscopically in 8 subjects without upper gastrointestinal disease, and in 8 duodenal ulcer patients. The DU patients had a BAO of 6.6 +/- 1.9 and a PAO of 41.8 +/- 6.1 mEq/h. In DU patients, a lack of the acid and gastrin-release inhibiting agent somatostatin was found neither in antral nor in fundic mucosa (185 +/- 60 vs 83 +/- 19 pmol/g tissue wet weight in controls). Basal and peak acid outputs of DU patients were positively correlated with fundic somatostatin concentrations (p less than 0.01). While gastrin levels were not significantly elevated in the antrum of DU patients, the mucosal content of potentially releasable gastrin of the duodenal bulb and the descending duodenum was higher than in controls (p less than 0.01). In the whole duodenum, CCK-like immunoreactivity was also more abundant in DU patients than in controls, whereas GIP and motilin did not exhibit characteristic profiles. Presumably as a reactive phenomenon, the mucosal levels of the peptidergic neurotransmitters VIP and substance P were markedly increased in the proximal duodenum of DU patients.
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PMID:Gastroduodenal mucosal hormone content in duodenal ulcer disease. 241 97

A whole mount immunofluorescence method was used for the localization of immunoreactivity (IR) to four regulatory peptides and the bioamine serotonin in the nervous system of Stenostomum leucops (Turbellaria, Platyhelminthes). The flatworm S. leucops belongs to the taxon Catenulida which, according to the new phylogenetic system by Ax [2], forms a key group between the coelenterates and more advanced flatworm species. Positive IR was obtained using antisera against FMRF-amide, beta-endorphin, growth hormone releasing factor (GRF), substance P, and serotonin. The distribution patterns of these neuropeptide-like immunoreactivities differ significantly from each other. Antisera against Leu-enkephalin, bovine pancreatic polypeptide (BPP), bombesin, cholecystokinin (CCK-8), neurotensin, somatostatin, growth hormone (GH), secretin, and neurophysin II gave negative results. This primitive flatworm shows similarities with hydra in the lack of IR to anti-somatostatin, anti-Leu-enkephalin, and anti-BPP. These antisera give positive IR in more advanced flatworm species, indicating a later convergent evolution of vertebrate-like peptides within the phylum Platyhelminthes.
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PMID:Neuropeptides in a microturbellarian--whole mount immunocytochemistry. 242 Dec 67

The cochleae of juvenile guinea pigs were investigated for the presence of several neuropeptides. Glucagon, insulin, CCK and beta-endorphin immunoreactive neurons and nerve fibers as well as hair cells were demonstrated by the peroxidase antiperoxidase technique. Small amounts of substance P were also found in different sites in the inner ear. In contrast, prolactin-like material could not be found at all. These findings have significance with regard to the putative role of neuropeptides in neuromodulation.
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PMID:Immunocytochemical detection of peptides in the guinea pig cochlea. 242 64

Treatment of common marmosets with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP; 1-4 mg/kg for up to 4 days) caused a profound parkinsonian state. Ten days from the start of MPTP treatment, all animals showed marked motor impairment, consisting of bradykinesia and akinesia, limb rigidity, postural abnormalities, loss of vocalisation and blink reflex, and, on occasions, postural tremor. Measurement of caudate-putamen monoamine content at this time showed a profound loss in 3,4-dihydroxyphenylethylamine, homovanillic acid, and 3,4-dihydroxyphenylacetic acid concentrations. Measurement of neuropeptide concentrations in the caudate-putamen, internal and external segments of the globus pallidus, nucleus accumbens, substantia nigra, frontal cortex, and hippocampus showed met-enkephalin, leu-enkephalin, and cholecystokinin (CCK-8) concentrations to be unaffected by MPTP treatment. There was a small decrease in the substance P content of frontal cortex, but otherwise the content of this neuropeptide was unaltered. Parkinsonism in the marmoset, induced by MPTP treatment 10 days earlier, does not alter neuropeptide concentrations in the manner observed in Parkinson's disease.
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PMID:Lack of change in basal ganglia neuropeptide content following subacute 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine treatment of the common marmoset. 242 37

The contribution of the myenteric plexus in the mechanical responses of rat jejunal longitudinal muscle produced by several enteric nerve substances was evaluated. The myenteric plexus of a segment of rat jejunum was destroyed by serosal application of benzalkonium chloride (BAC). Fifteen days after BAC treatment, both the BAC-treated and an orad control jejunal segment were removed and the mechanical responses of the longitudinal muscle produced by the following substances were examined: substance P, acetylcholine (ACh), 5-hydroxytryptamine (5-HT), cholecystokinin octapeptide (CCK-8), norepinephrine, vasoactive intestinal peptide (VIP), bombesin, [Leu5]enkephalin and somatostatin. Our results indicate that: substance P and norepinephrine produce their mechanical responses by acting predominantly on the longitudinal smooth muscle; 5-HT, CCK-8, ATP, VIP and neurotensin act predominantly through the myenteric plexus; ACh possesses both direct and indirect actions; and because the responses to [Leu5]enkephalin, bombesin and somatostatin were equivocal, a conclusion as to their site of action could not be made with this preparation.
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PMID:Differentiation between myenteric plexus and longitudinal muscle of the rat jejunum as the site of action of putative enteric neurotransmitters. 243 41

Several antisera specific to neuropeptides of vertebrates were applied to sections of the earthworm Eisenia fetida Sav. Some of them were able to reveal specific neurones of the supraoesophageal ganglion: h-GHRF, CRF, Leu- and Met-enkephalin, dynorphin, substance P, CCK-8, and CCK-8S. A map of different areas or nuclei was established in the brain, taking position of reactive cells into account. Four symmetrically paired nuclei and one mediodorsal nucleus were identified and plotted. There is generally no characteristic modification correlated with maturation of the worms. However, the reaction against anti-Leu-enkephalin differs significantly according to age of Eisenia in nucleus No. 1 and particularly in nuclei No. 2 where one cell group presents specific reactivity on and after puberty. Moreover, the successive application of two antisera to the same sections after elution showed no coexistence of substances in a single neurone. By comparison with these vertebrate peptide-like containing nerve cells, the assay to anti-5-HT showed only a few reactive aminergic neurones. An attempt of correlation of cellular types with reactive perikarya is started.
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PMID:[Establishment of a map of neurons in the brain of Eisenia fetida (Annelida, Oligochaeta) containing substances immunologically specific to vertebrate peptides]. 243 10

The isolated, spontaneously active portal vein of guinea pig was stimulated by the following compounds (the pD2 is given in parentheses): caerulein (CER, 8.02), cholecystokinin octapeptide (CCK-8, 7.59), substance P (SP, 4.68), and carbachol (5.37), whereas neurotensin (NT) was ineffective and angiotensin II (AII) produced inhibition. On the portal vein of the rat, CER and CCK-8 were ineffective, whereas stimulation occurred with SP (5.72), NT (6.79), AII (7.89), and carbachol (5.50). Tetrodotoxin did not modify these effects in both types of preparation. Cyclic dibutyryl guanosine monophosphate reduced the effect of CCK-8 and CER but not that of carbachol. It is concluded that the peptides stimulate the portal vein in a way independent from intramural neurons. It may be speculated that receptors for CCK-8 and CER are absent in the portal vein of rat and those for NT in the guinea pig vein.
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PMID:Cholecystokinin octapeptide, caerulein, substance P, neurotensin, and angiotensin II: species-typical effects on the isolated portal vein of guinea pig and rat. 243 99

Afferent perikarya in dorsal root ganglia (DRG) at the T13 and L1 segmental levels projecting to the rat ovary were identified by utilizing the fluorescent retrograde tracer true blue (TB). Subsequently, TB-labeled ovarian afferent perikarya in DRG were examined for vasoactive intestinal polypeptide (VIP), substance P (SP), cholecystokinin-8 (CCK-8), neuropeptide Y (NPY), and somatostatin (SOM) immunoreactivity and for the presence of fluoride-resistant acid phosphatase (FRAP) enzyme activity. Of the ovarian afferent perikarya at the T13 and L1 segmental levels, 20.5% displayed VIP immunoreactivity, 23.8% displayed SP immunoreactivity, and 43.1% were immunoreactive for CCK-8. No ovarian afferent perikarya contained SOM or NYP immunoreactivity or FRAP activity. It is suggested that different neuropeptides may participate in modulation of specific ovarian functions.
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PMID:Neuropeptides in sensory perikarya projecting to the rat ovary. 244 98

Caerulein, CCK8, and gastrin, hormones which interact with the cholecystokinin receptor increased the growth of mouse pancreatic acinar cells in vitro. In contrast, bombesin, substance P, and carbachol, factors which interact with separate receptors, and stimulate pancreatic secretion similarly to CCK by mobilising intracellular Ca2+, did not have any effect on the growth of pancreatic acinar cells in vitro. These results suggest both a unique role for cholecystokinin in the physiological regulation of the pancreas and that the mechanisms that mediate the trophic effects of cholecystokinin are different from those that mediate secretion.
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PMID:Effects of calcium mediated secretagogues on the growth of pancreatic acinar cells in vitro. 244 61

The neuropeptide cholecystokinin(26-33) (CCK) is widely distributed in the mammalian central nervous system, including the spinal cord. We have studied the possible interaction of CCK with GABA release mechanisms. Low doses of CCK-8 (1 nM) have been found to evoke calcium-dependent [3H]GABA release from an in vivo perfused spinal cord preparation in the anaesthetized rat. Tachyphylaxis was seen to the [3H]GABA releasing action of CCK-8. The injection of proglumide (150 mg/kg i.p.) totally blocked the [3H]GABA release produced by CCK-8 or by a medium containing 50 mM potassium. Substance P (10 microM) did not produce release of [3H]GABA, although in the same animals 50 mM potassium containing solutions could be shown to evoke release of [3H]GABA.
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PMID:Cholecystokinin releases [3H]GABA from the perfused subarachnoid space of the anaesthetized rat spinal cord. 245 Mar 6


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