Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound   Target Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound

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Query: EC:1.6.99.1 (NADPH-diaphorase)
3,903 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Previous studies have demonstrated that the epithelium of the respiratory portion of rat nasal mucosa is amply supplied by nerve fibers with immunoreactivities for calcitonin gene-related peptide (CGRP) and substance P (SP), these fibers most likely acting as sensory mediators in the mucosa. The present study demonstrates that some intraepithelial fibers contain a VIP-immunoreactivity whose occurrence in these nerves has previously been neglected. The present study further aims to confirm the occurrence of NO-producing intraepithelial nerve fibers in the rat nasal mucosa and to examine its colocalization with CGRP and with VIP. Double staining methods were used to evaluate the colocalization of NADPH-diaphorase. The reactivity for NADPH-diaphorase and that for CGRP coexisted in only a small part, if any, of the nerve fibers distributed at the basal portion of the epithelium. In the perpendicularly and obliquely oriented transepithelial nerve fibers, both reactivities were clearly demonstrated to be separated in different fibers. VIP immunoreactivity was also present in a part of the intraepithelial nerve fibers of the nasal mucosa, and their entire population was shown to be positive for NADPH-diaphorase. The NADPH-diaphorase-positive reaction was displayed in only a small population of neurons in the trigeminal ganglion, whereas it was seen in numerous neurons in sphenopalatine ganglion, being colocalized with VIP.
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PMID:Intraepithelial nerve fibers in the nasal mucosa of the rat with special reference to the localization of CGRP, VIP and nitric oxide (NO). 856 35

The histochemical marker for nitric oxide synthase, NADPH diaphorase, is known to co-localize in mammalian neurones with various classical neurotransmitters and neuropeptides. The nervous system of the parasitic nematode Ascaris suum has previously been shown to contain both NADPH diaphorase activity and neuropeptide immunoreactivity. This study examined the possibility that NADPH diaphorase and neuropeptide immunoreactivity may co-exist in the same neurones. Two antisera were used, one raised to KYSALMFamide, a C-terminal synthetic analogue of SALMFamide 1 (GFNSALMFamide), and another that recognizes calcitonin-gene-related peptide (CGRP). We provide evidence that in a distinct subset of neurones in the ventral, dorsal and lateral ganglia NADPH diaphorase staining and SALMFamide-like immunoreactivity are co-localized, suggesting a possible role for nitric oxide in modulating neuropeptide activity in these regions. CGRP-like immunoreactivity was less widely distributed, and was not consistently co-localized with NADPH diaphorase.
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PMID:NADPH diaphorase activity in peptidergic neurones of the parasitic nematode, Ascaris suum. 858 95

Neurons in the human adrenal medulla, stained by the NADH-diaphorase reaction, were counted and their neurochemical markers were investigated by double labeling immunofluorescence with special reference to substance P. The findings indicate a significant participation of intramedullary nerve cell bodies in human adrenal innervation with 40.4 neurons/mm3 adrenal medulla. Substance P-immunoreactive neurons, which made up approximately 20% of all neurons, exhibited heterogeneity by co-localization of immunoreactivities for dynorphin, for cholecystokinin, and for neurofilament triplet. Substance-P-immunolabeled neurons were always nonreactive for calcitonin gene-related peptide, for vasoactive intestinal polypeptide, or for tyrosine hydroxylase, the rate-limiting enzyme of catecholamine synthesis. These chemical phenotypes of intramedullary neurons reveal immunohistochemical similarities with postganglionic neurons in parasympathetic ganglia or with enteric neurons, suggesting a hitherto unrecognized functional significance of the intrinsic nervous system in the human adrenal gland.
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PMID:Immunohistochemical heterogeneity of nerve cells in the human adrenal gland with special reference to substance P. 860 96

To characterize the innervation of the cynomolgus monkey (Macaca fascicularis) Meibomian (tarsal) glands, upper lids of six cynomolgus monkeys were investigated with electronmicroscopical and double-labeling immunocytochemical methods. Antibodies against calcitonin gene-related peptide (CGRP), dopamine-beta-hydroxylase (DBH), neuropeptide Y (NPY), nitric oxide synthase (NOS), protein gene product 9.5 (PGP 9.5), substance P (SP), tyrosine hydroxylase (TH), and vasoactive intestinal peptide (VIP) were used. In addition, sections were processed for NADPH-diaphorase (NADPH-d) histochemistry. Staining for PGP 9.5 and electron microscopy showed that Meibomian gland acini were surrounded by a network of unmyelinated nerves and terminal varicose axons. The terminals contained small agranular (30-60 nm) and large granular vesicles (65-110 nm), and were observed in close contact with the basal lamina of the acini, but never internally to the basal lamina. Meibomian axons showed like-immunoreactivity (LI) for the neuropeptides SP, CGRP, NPY, and VIP. In addition, the axons stained for TH, DBH, NOS, and NADPH-d. VIP-LI, NOS- and NADPH-d-positive axons appeared to be more numerous, TH- and DBH-positive axons more rare than others. Most SP-LI axons were double-labelled for CGRP-LI, some for VIP-LI or NPY-LI. In addition, some VIP-LI axons were double-labeled for NPY-LI. NPY/VIP-LI and NPY/SP-LI axons were only observed close to the Meibomian acini. Conversely, NPY-LI colocalized with TH-IR or DBH-IR predominated in perivascular nerves of Meibomian gland vasculature. The close association of varicose axons with the acini of Meibomian glands indicates that nervous signals modulate meibomian secretion. Meibomian gland nerve fibers in the cynomolgus monkey appear to utilize various neuropeptides, catecholamines and nitric oxide as transmitter substances, and seem to derive from the pterygopalatine, superior cervical and trigeminal ganglion respectively.
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PMID:Characterization of Meibomian gland innervation in the cynomolgus monkey (Macaca fascicularis). 869 72

Long-term (2-12 weeks) cultures of adult guinea-pig ventricular myocytes, cocultured with neurons derived from stellate or intrinsic cardiac ganglia, retain their functional properties (Horackova et al., 1993, 1994, 1995). The present study was designed to investigate the morphological and immunochemical properties of such neurons and their associated cardiomyocytes. Cultured myocytes studied by means of phalloidin-rhodamine (for F-actin) and an antibody raised against myomes revealed parallel myofibrils with striations typical of rod-shaped cardiomyocytes, even while myocytes changed from cylindrical to flattened form as they established intercellular contacts. Microtubular networks, identified by alpha-tubulin DM1A antibody, were arrayed longitudinally in myofibrils, being especially prominent during the formation of intercellular contacts between myocytes. Histochemically identified adult peripheral autonomic neurons cultured alone or with myocytes displayed a variety of shapes. alpha-Tubulin staining was associated with the somata and neurites of various-shaped neurons whether cultured alone or with myocytes. Cultured neurons derived from stellate and intrinsic cardiac ganglia also exhibited staining for the general neuronal marker PGP 9.5 (protein gene product 9.5), and for specific markers of the following neurochemicals: tyrosine hydroxylase, acetylcholinesterase, choline acetyltransferase, neuropeptide Y, vasoactive intestinal peptide, calcitonin gene-related peptide, bradykinin, oxytocin, and NADPH-diaphorase. These data indicate that: (a) adult ventricular myocytes cocultured with intrathoracic neurons retain the structural properties of adult myocytes found in vivo; (b) intrinsic cardiac and extrinsic intrathoracic neurons cultured alone or with cardiomyocytes display morphological characteristics similar to those of neurons studied in situ; (c) intrinsic cardiac and intrathoracic extracardiac neurons cultured alone or with cardiomyocytes display a variety of morphologies (unipolar, bipolar, and multipolar), larger and more multipolar neurons being present in cultures derived from stellate versus intrinsic cardiac ganglia; (d) such cultured neurons are associated with a number of neurochemicals, more than one chemical being associated with each neuron. This model presents an excellent opportunity to study the morphology of individual peripheral extracardiac and intracardiac neurons as well as their potential to produce various neurochemicals that are known to be involved in the neuromodulation of cardiomyocyte function.
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PMID:Morphological and immunohistochemical properties of primary long-term cultures of adult guinea-pig ventricular cardiomyocytes with peripheral cardiac neurons. 876 Aug 56

The aims of the present study were to determine whether nerves that contain nitric oxide synthase (NOS), calcitonin gene-related peptide (CGRP) or substance P (SP) are present in the human vagina and, if so, to determine the pattern of innervation relative to that of other neurotransmitters, particularly vasoactive intestinal polypeptide (VIP) and neuropeptide Y (NPY). Surgical specimens of vaginal tissue (n = 10) from pre- and postmenopausal women were fixed and processed for immunohistochemistry of peptides and NOS and for histochemistry of NADPH-diaphorase. SP-immunoreactive nerves were very sparse, being absent from 9 of the 10 tissue samples. For other peptides and NOS, the innervation of the deep arteries and veins was greater than that of blood vessels in the propria. Capillaries in the epithelial papillae also appeared to be innervated by nerves containing NOS, CGRP, NPY and VIP. Beneath the epithelium nerve fibres formed a subepithelial plexus; no nerve cell bodies were seen. The relative density of innervation by immunoreactive fibres was PGP-9.5 > NPY > VIP >> NOS > CGRP > SP. These results imply that nerves that utilise nitric oxide or NPY, VIP or CGRP as a neurotransmitter may play a role in controlling blood flow and capillary permeability in the human vagina. The origin and function of all these nerves is discussed.
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PMID:Innervation of vasculature and microvasculature of the human vagina by NOS and neuropeptide-containing nerves. 876 80

The rat uterus is innervated by sensory and autonomic nerves. Sensory and sympathetic fibers travel in the hypogastric nerves and are associated with the thoracolumbar spinal cord levels T13-L3. The inferior mesenteric ganglion (IMG) contains the somata of sympathetic postganglionic neurons and some of these may project axons to the uterus. Sensory and parasympathetic fibers travel in the pelvic nerve and are associated with the lumbosacral cord levels L6-S1 and pelvic ganglion (PG). We previously reported data concerning the neurochemical anatomy of the PG with regard to the uterine innervation; the present study was undertaken to characterize the neurochemical anatomy of the IMG with regard to it involvement in uterine innervation. A retrograde axonal tracer was used to verify projections of axons of IMG neurons to the uterus. Immunostaining of cryostat sections of the IMG revealed neurons immunoreactive for neuropeptide Y (NPY) and for tyrosine hydroxylase (TH). Immunostaining for the synaptic terminal protein synapsin I (SYN) revealed numerous fine terminals immediately surrounding the principal neurons and in the interneuronal spaces. Varicosities immunoreactive for calcitonin gene-related peptide (CGRP), vasoactive intestinal polypeptide (VIP), enkephalin (ENK), substance P (SP) and galanin (GAL) appear to be associated with principal neurons. Additional varicosities stained for nicotinamide adenine dinucleotide phosphate (reduced)-diaphorase (NADPH-d) and nitric oxide synthase (NOS), thus indicating sites of neuronal nitric oxide synthesis. This study revealed that the IMG contains uterine-related neurons and that some of the retrogradely labeled uterine-related neurons contain NPY, TH or both NPY/TH. In addition, uterine-related neurons received abundant afferent inputs indicated by SYN-immunoreactive (-ir) terminals and some of these varicosities labeled for GAL, CGRP, VIP, ENK, or NADPH-d/NOS.
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PMID:Identification of uterine-related sympathetic neurons in the rat inferior mesenteric ganglion: neurotransmitter content and afferent input. 881 65

Neurones in the ureterovesical ganglion complex provide autonomic innervation to the pelvic ureter, the ureterovesical junction and the bladder trigone. We examined the distribution and peptide co-expression pattern of nitric oxide synthase (NOS) in the human ureterovesical ganglia by combining NADPH-diaphorase histochemistry with immunoreactivity for vasoactive intestinal peptide (VIP), neuropeptide Y (NPY), and calcitonin gene-related peptide (CGRP). Less than 20% of nerve cells in the large ganglia of the ureterovesical complex were stained for NOS activity. In elderly individuals, ganglion cells regularly exhibited conspicuous morphological alterations suggestive of degenerative changes. Most of the NOS-positive cell bodies costained for VIP-immunoreactivity. A minority of NOS-expressing cells also reacted for NPY-immunoreactivity. CGRP-immunoreactivity was present in varicose terminal-like nerve fibres which were found to encircle NOS-containing perikarya. Occasionally, NOS-positive somata were surrounded by plexiform axon terminals which immunostained for VIP or NPY. We conclude that the passage of urine across the ureterovesical junction is under relaxatory control of a local nitric oxide/VIP(NPY) pathway which may be modulated by preganglionic efferent and/or primary afferent input.
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PMID:Colocalisation of NADPH-diaphorase with neuropeptides in the ureterovesical ganglia of humans. 886 54

The presence and coexistence of calbindin D-28k-immunoreactivity (ir) and nicotinamide adenosine dinucleotide phosphate (NADPH)-diaphorase activity (a marker of neurons that are presumed to convert L-arginine to L-citrulline and nitric oxide) were examined in the glossopharyngeal and vagal sensory ganglia (jugular, petrosal and nodose ganglia) of the rat. Calbindin D-28k-ir nerve cells were found in moderate and large numbers in the petrosal and nodose ganglia, respectively. Some calbindin D-28k-ir nerve cells were also observed in the jugular ganglion. NADPH-diaphorase positive nerve cells were localized to the jugular and nodose ganglia and were rare in the petrosal ganglion. A considerable portion (33-51%) of the NADPH-diaphorase positive neurons in these ganglia colocalized calbindin D-28k-ir. The presence and colocalization of calbindin D-28k-ir and NADPH-diaphorase activity in neurotransmitter-identified subpopulations of visceral sensory neurons were also studied. In all three ganglia, calcitonin gene-related peptide (CGRP)-ir was present in many NADPH-diaphorase positive neurons, a subset of which also contained calbindin D-28k-ir. In the nodose ganglion, many (42%) of tyrosine hydroxylase (TH)-ir neurons also contained NADPH diaphorase activity but did not contain calbindin D-28k-ir. These data are consistent with a potential co-operative role for calbindin D-28k and NADPH-diaphorase in the functions of a subpopulation of vagal and glossopharyngeal sensory neurons.
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PMID:Coexistence of calbindin D-28k and NADPH-diaphorase in vagal and glossopharyngeal sensory neurons of the rat. 891 73

The participation of vasoactive intestinal polypeptide (VIP) or calcitonin gene-related peptide (CGRP) in the nitrergic innervation of the canine laryngeal glands was investigated using a double-staining technique of NADPH-diaphorase (NADPHd) histochemistry and VIP or CGRP immunohistochemistry. NADPHd-positive nerve fibers with varicosities appeared to terminate in some acinar cells. Double staining revealed that NADPHd reactivity and VIP- or CGRP-like immunoreactivity were colocalized in some nerve fibers distributed around the acini. A cluster of NADPHd-positive cells were occasionally found in the larynx. Many NADPHd-positive cells had VIP-like immunoreactivity and no NADPHd-positive cells were CGRP-like immunoreactive. These findings suggest that nitric oxide participates in the neural control of the laryngeal exocrine secretion in cooperation with intrinsic VIP and/or extrinsic CGRP.
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PMID:Relationship of neuropeptides to nitrergic innervation of the canine laryngeal glands. 891 75


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