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)

Counts performed on dissociated cell cultures of E10 chick embryo dorsal root ganglia (DRG) showed after 4-6 days of culture a pronounced decline of the neuronal population in neuron-enriched cultures and a net gain in the number of ganglion cells in mixed DRG cell cultures (containing both neurons and nonneuronal cells). In the latter case, the increase in the number of neurons was found to depend on NGF and to average 119% in defined medium or 129% in horse serum-supplemented medium after 6 days of culture. The lack of [3H]thymidine incorporation into the neuronal population indicated that the newly formed ganglion cells were not generated by proliferation. On the contrary, the differentiation of postmitotic neuroblasts present in the nonneuronal cell compartment was supported by sequential microphotographs of selected fields taken every hour for 48-55 hr after 3 days of culture. Apparently nonneuronal flat dark cells exhibited morphological changes and gradually evolved into neuronal ovoid and refringent cell bodies with expanding neurites. The ultrastructural organization of these evolving cells corresponded to that of primitive or intermediate neuroblasts. The neuronal nature of these rounding up cell bodies was indeed confirmed by the progressive expression of various neuronal cell markers (150 and 200-kDa neurofilament triplets, neuron specific enolase, and D2/N-CAM). Besides a constant lack of immunoreactivity for tyrosine hydroxylase, somatostatin, parvalbumin, and calbindin-D 28K and a lack of cytoenzymatic activity for carbonic anhydrase, all the newly produced neurons expressed three main phenotypic characteristics: a small cell body, a strong immunoreactivity to MAG, and substance P. Hence, ganglion cells newly differentiated in culture would meet characteristics ascribed to small B sensory neurons and more specifically to a subpopulation of ganglion cells containing substance P-immunoreactive material.
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PMID:Differentiation of postmitotic neuroblasts into substance P-immunoreactive sensory neurons in dissociated cultures of chick dorsal root ganglion. 243 96

Calbindin D28k, previously demonstrated in the mammalian central nervous system, has been localized to discrete neurons in the enteric nervous system of the rat. Calbindin D28k is present in cell bodies in both the myenteric and submucous plexi and in interganglionic nerve fibers in all regions of the gastrointestinal tract. Immunoreactive nerve fibers were also detected in the mucosal region, although none were observed in the pyloric sphincter, circular or longitudinal muscle layers. The highest concentration of immunoreactivity was present in the submucosal plexus and mucosa of the colon. Western blot analysis of the protein detected by the antiserum confirmed that it comigrated with purified calbindin D28k and the single immunoreactive band seen in extracts from rat brain. The colocalization of calbindin D28k with components of the peptidergic innervation was also investigated. Of the peptides studied the neurons containing both vasoactive intestinal polypeptide and neuropeptide Y in the submucous plexus were seen to exhibit calbindin D28k immunoreactivity. The neurons containing somatostatin, galanin and substance P did not demonstrate co-localization. In the stomach, calbindin D28k was detected within a small number of epithelial cells which were found to correspond to a sub-population of the somatostatin-immunoreactive endocrine cells.
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PMID:Distribution and co-localization of calbindin D28k with VIP and neuropeptide Y but not somatostatin, galanin and substance P in the enteric nervous system of the rat. 245 56

Calbindin-D28K was immunohistochemically localized in myenteric and submucosal plexuses throughout the rat intestine. Calbindin-D28K immunoreactivity was found in about half of myenteric neurons and in more than 90% of submucosal neurons. Calbindin-D28K was also observed in nerve processes running inside ganglia, muscle layers and lamina propria. No correlation could be established between the presence of calbindin-D28K and the distribution of neuropeptides localized in this study (VIP, enkephalin, somatostatin and substance P). In addition, some endocrine-like cells of the ileum were calbindin-D28K-positive. Half of these endocrine cells also contained neurotensin but none of the other neuropeptides investigated.
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PMID:Calbindin-D28K and the peptidergic neuroendocrine system in rat gut: an immunohistochemical study. 246 Dec 41

Neuromedin U immunoreactivity was located histochemically in the guinea-pig small intestine. Projections of immunoreactive neurons were determined by analysing patterns of degeneration following nerve lesions. The co-localization of neuromedin U immunoreactivity with immunoreactivity for substance P, neuropeptide Y, vasoactive intestinal peptide and calbindin was also investigated. Neuromedin U immunoreactivity was found in nerve cells in the myenteric and submucous plexuses and in nerve fibres in these ganglionated plexuses, around submucous arterioles and in the mucosa. Reactive fibres did not supply the muscle layers. Most reactive nerve cells in the myenteric ganglia had Dogiel type-II morphology and in many there was co-localization of calbindin, although some Dogiel type-II neuromedin U neurons were calbindin negative. Lesion studies suggest that these myenteric neurons project circumferentially to local myenteric ganglia. Projections from myenteric neurons also run anally in the myenteric plexus, while other projections extend to submucous ganglia, and still further projections run from the intestine to provide terminals in the coeliac ganglia. In the submucous ganglia neuromedin U was co-localized in three populations of nerve cells: (i) those with vasoactive intestinal peptide immunoreactivity, (ii) neurons containing neuropeptide Y, and (iii) neurons containing substance P. Each of these populations sends nerve fibres to the mucosa. Neuromedin U immunoreactivity is thus located in a variety of neurons serving different functions in the intestine and therefore probably does not have a single role in intestinal physiology.
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PMID:Projections of neurons with neuromedin U-like immunoreactivity in the small intestine of the guinea-pig. 247 33

The arrangement of the enteric nerve plexuses, and the distributions and projections of chemically specified neurons in the proximal colon of the guinea-pig were studied. The neural plexuses were examined using immunoreactivity to neuron specific enolase, and individual subpopulations were studied using antibodies raised against vasoactive intestinal peptide (VIP), substance P (SP), enkephalin, neuropeptide Y (NPY), gastrin releasing peptide (GRP), galanin, somatostatin, calbindin and calretinin. Nitric oxide producing neurons were studied using NADPH diaphorase histochemistry. The myenteric and submucous plexuses were not uniform around the entire circumference; at the mesenteric aspect of the colon there was almost no longitudinal muscle and the circular muscle was unusually thick and cord-like. In this region there was no tertiary plexus of fibres, and the ganglia of the myenteric and submucous plexuses were elongated in the direction of the circular muscle. Neuronal pathways within the antimesenteric aspect of the colon were investigated using nerve lesioning procedures. VIP, GRP, galanin, calbindin and NADPH diaphorase containing neurons lay in anally projecting pathways within the myenteric plexus, while enkephalin and somatostatin appeared in orally projecting nerve pathways. Few NPY immunoreactive nerve cells were found in the myenteric plexus of the proximal colon. The longitudinal muscle was innervated with VIP, SP, enkephalin and NADPH diaphorase containing fibres. The circular muscle was innervated by axons containing all substances investigated except NPY. Galanin, NPY, somatostatin and VIP fibres, all particularly dense in the mucosa, largely arose from nerve cell bodies in the submucous plexus. The results of the present study indicate that chemically specified neuronal populations in the proximal colon of the guinea-pig are more similar to the distal colon than the ileum, but that neuro-chemical and anatomical differences exist between the proximal and distal colon.
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PMID:Immunohistochemical analysis of neurons and their projections in the proximal colon of the guinea-pig. 751 May 7

This study in the African green monkey (Cercopithecus aethiops) was designed to characterize the neurochemical features of hippocampal nonpyramidal neurons that are specific synaptic targets of substance P-containing projective neurons located in the supramammillary nucleus. Our previous studies provided evidence for an excitatory nature to this hypothalamo-hippocampal pathway and described the mode of termination of these afferents on hippocampal principal neurons. The present correlated light and electron microscopic immunocytochemical analysis, using the nickel-diaminobenzidine/diaminobenzidine double-labeling technique, revealed that this hippocampal afferent system establishes multiple, exclusively asymmetric synapses with three specific subpopulations of nonpyramidal cells: (1) a small portion of parvalbumin-containing basket cells located periodically in or adjacent to the granule cell layer of the dentate gyrus, which therefore inhibit only a subpopulation of granule cells; (2) some of the calbindin-immunoreactive local circuit neurons located in the hilar area; and (3) calbindin-positive cells occurring exclusively in the stratum molecular of the middle portion of the CA3 subfield. Postembedding studies revealed that the aforementioned calbindin-containing cells are GABAergic inhibitory neurons. Our studies indicate that hypothalamic afferents can effectively filter the information flow at different levels of the excitatory signal loop in the monkey hippocampal formation. Dentate granule cells, which are only stimulated by hypothalamic afferents, will transfer excitatory signals differently than those that are controlled by a feedforward inhibitory mechanism initiated by these fibers. In the CA3 subfield, the signal flow can again be depressed by those pyramidal neurons that are inhibited by calbindin-containing cells receiving an excitatory hypothalamic input.
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PMID:Morphological evidence that hypothalamic substance P-containing afferents are capable of filtering the signal flow in the monkey hippocampal formation. 751 94

The primary sensory neurons in mouse dorsal root ganglia consist of diversified subpopulations which express distinct phenotypic characteristics such as substance P or calbindin D-28k. To determine whether neuronal phenotypes are altered or not in in vitro cultures carried out in a defined synthetic medium, dissociated dorsal root ganglion cells from newborn mice were grown in the alpha-modified minimum essential medium either supplemented with 10% fetal calf serum or serum-free. About 80% of the neurons survived after 5 days of culture in both media, but only 35% or 65% were rescued after 12 days in serum-free or fetal calf serum supplemented medium, respectively. The neuronal subpopulations expressing substance P or calbindin D-28k displayed similar morphological properties in both media and a higher resistance to culture conditions than the whole neuronal cell population, especially in serum-free medium. It is therefore concluded that a defined synthetic medium offers reproducible conditions to culture dorsal root ganglion cells for at least 5 days, stimulates the expression of substance P and enriches preferentially neuronal phenotypes expressing substance P or calbindin D-28k, for a longer period of culture.
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PMID:Neuronal phenotypes in mouse dorsal root ganglion cell cultures: enrichment of substance P and calbindin D-28k expressing neurons in a defined medium. 752 72

The mammalian striatum may be divided into a striosomal compartment and a surrounding matrix region. We have examined the distribution of leucine enkephalin (LENK) and substance P (SP) immunoreactivity in relation to striosomes defined by calbindin-D (CABD) staining in alternate 70 microns serial sections from the human caudate nucleus. The distribution of LENK immunoreactivity showed a transition from dorsal to ventral striatum: dorsally, LENK-rich patches were present in a lightly stained matrix; mid-ventrally, annular patches of LENK staining with a lighter core were seen. These patches corresponded to striosomal regions defined by CABD-poor zones. In contrast, in the ventral caudate and nucleus accumbens, LENK-poor zones matched CABD-defined striosomes. CABD staining in the matrix was intense in the dorsal caudate, diminishing ventrally. SP-rich zones in dorsal caudate and SP-poor areas in the mid-ventral region overlapped striosomes. In the ventromedial sector, the SP staining pattern was complex and did not consistently correlate with striosomes. Computer-assisted three-dimensional reconstruction of the striosomal system in the human, based on regions of either high LENK or low CABD immunoreactivity, revealed the existence of considerable long-range order. Patches appeared aligned over several millimeters to form long, horizontal structures in the caudate nucleus, with occasional orthogonal interconnecting crossbridges. Our results are in accord with previous work in the human and in other species. These three-dimensional networks are strikingly similar across individuals and may relate to the segregation of and interactions between striatal circuits.
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PMID:Compartmental organization of the peptide network in the human caudate nucleus. 753 55

The aim of this study was to investigate the neurochemical coding of myenteric neurons in the guinea pig gastric corpus by using immunohistochemical methods. Antibodies and antisera against calbindin (CALB), calretinin (CALRET), choline acetyltransferase (ChAT), calcitonin gene-related peptide (CGRP), dopamine beta-hydroxylase (DBH), beta-endorphin (ENK), neuropeptide Y (NPY), neuron-specific enolase (NSE), nitric oxide synthase (NOS), protein gene product 9.5 (PGP), parvalbumin (PARV), serotonin (5-HT), somatostatin (SOM), substance P (SP), tyrosine hydroxylase (TH), and vasoactive intestinal peptide (VIP) were used. Double- and triple-labeling studies revealed colocalization of certain transmitters and enabled the identification of distinct subpopulations of gastric enteric neurons. NPY/VIP/NOS/ENK were present in 28% of all neurons, whereas 11% had NPY/VIP/DBH/ChAT; NOS-only neurons made up 2% of the population. The combination SP/ChAT/ENK occurred in 21% of the population, whereas SP/ChAT/ENK/CALRET and SP/CHAT/SOM/ +/- CALRET was identified in 5% and 6% of all cells, respectively. 5-HT-containing neurons comprised 2% of all cells and could be further classified by the presence of additional antigens as 5-HT/SP/(ChAT) or 5-HT/VIP/(ChAT). Approximately 21% of all neurons contained only ChAT with no additional antigen present and are referred to as ChAT/-. Gastric myenteric ganglion cells were not immunoreactive for CALB, PARV, CGRP, or TH. The results of this study indicate that gastric myenteric neurons can be characterized on the basis of different chemical coding. Neurochemical coding of corpus myenteric neurons revealed some similarities and significant differences in comparison with other regions of the gut. These differences might reflect adaptation of enteric nerves according to regional specialization and the distinct functions of the proximal stomach as a gastric reservoir.
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PMID:Neurochemical coding of enteric neurons in the guinea pig stomach. 753 52

A controversy exists in the literature as to whether neurons containing the calcium binding protein calbindin-D28k are located within the human substantia nigra. The point of variance between reports, however, is not the anatomical distribution of these neurons, but rather the delineation of the dorsal border of the substantia nigra. It has been suggested that the dense substance P striatonigral innervation delimits the substantia nigra in the human. The aim of the present study is to re-examine the distribution of calbindin-D28k-positive neurons throughout the substantia nigra using substance P to delimit its borders. Although a few calbindin-D28k-positive neurons were found in the medial cell group of the substantia nigra, the vast majority of positive neurons were located in the adjacent A8 and A10 dopaminergic cell groups. This anatomical location of calbindin-D28k-positive neurons is consistent with previous reports, though our results indicate that when the striatonigral projection is used to define the substantia nigra, calbindin-D28k is not a notable feature of these neurons. This questions the neuroprotective role of this protein in Parkinson's disease.
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PMID:Calbindin D28k-containing neurons are restricted to the medial substantia nigra in humans. 753 46


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