Voltage-gated delayed rectifier K v 1-subunits... 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Epub 2009 Jun 21. Voltage-gated delayed rectifier K v 1-subunits may serve as distinctive markers for enteroglial cells with different phenotypes in the murine ileum. Costagliola A, Van Nassauw L, Snyders D, Adriaensen D, Timmermans JP. SourceDepartment of Structures, Functions and Biological Technology, University of Naples Federico II, Via F. Delpino 1, 80137 Napoli, Italy. Abstract Due to entangled results concerning K(v)1 subunit distribution in the gastrointestinal wall, we aimed to unravel the expression of the delayed rectifier potassium subunits K(v)1.1 and K(v)1.2 in the murine ileum. Presence and distribution of both subunits were determined in cryosections and whole-mount preparations of the ileum of three different murine strains by indirect immunofluorescence, and analysed by conventional fluorescence and confocal microscopy. Distribution of both subunits was similar in the ileum of the three strains. K(v)1.1 immunoreactivity (IR) was found in some S100-expressing enteroglial cells (EGC) located at the periphery of myenteric ganglia, in S100-positive EGC along interganglionic, intramuscular and vascular nerve fibres, and in S100-positive EGC of the submucous plexus. K(v)1.1 IR was also observed in some GFAP-expressing EGC at the periphery of myenteric ganglia, and in GFAP-positive EGC of submucous ganglia. K(v)1.2 IR was detected in some intramuscular S100-positive EGC, in almost all submucous S100-expressing EGC, and in a few GFAP-expressing EGC. K(v)1.2 IR was also expressed in a majority of enteric neurons. Coding of these neurons showed that all cholinergic and most nitrergic neurons express K(v)1.2. In conclusion, the results showed that K(v)1.1 and K(v)1.2 were predominantly expressed in distinct EGC phenotypes. K(v)1.2 was also observed in distinct neuron subpopulations. Our results support the active role of EGC with distinct phenotypes in intestinal functions, which is relevant in view of their modulating role on intestinal barrier and inflammatory responses. PMID:19549557[PubMed - indexed for MEDLINE] Publication Types, MeSH Terms, SubstancesPublication TypesResearch Support, Non-U.S. Gov'tMeSH TermsAnimalsBiological Markers/metabolismFluorescent Antibody Technique, IndirectFluorometryIleum/innervation*Ileum/metabolism*Kv1.1 Potassium Channel/biosynthesis*Kv1.2 Potassium Channel/biosynthesis*MiceMice, Inbred BALB CMice, Inbred C57BLMicroscopy, ConfocalMyenteric Plexus/metabolismNeuroglia/metabolism*Neurons/metabolismProtein Subunits/biosynthesisSpecies SpecificitySubmucous Plexus/metabolismSubstancesBiological MarkersKv1.2 Potassium ChannelProtein SubunitsKv1.1 Potassium Channel LinkOut - more resourcesFull Text SourcesElsevier ScienceEBSCOOhioLINK Electronic Journal CenterSwets Information ServicesResearch MaterialsAnti-Melanoma gp100 antibody, prediluted - Abcam plc Supplemental Content Save items FavoriteView more options Create collection...Manage collections... loading Related citations in PubMed Characterisation of neurons expressing calbindin immunoreactivity in the ileum of the unweaned and mature sheep. 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Recent activity Clear Turn Off Turn On Voltage-gated delayed rectifier K v 1-subunits may serve as distinctive markers ... Voltage-gated delayed rectifier K v 1-subunits may serve as distinctive markers for enteroglial cells with different phenotypes in the murine ileum.Neurosci Lett. 2009 Sep 18 ;461(2):80-4. Epub 2009 Jun 21 . PubMed2009[pdat] AND Costagliola A[author] (4) PubMedRegion-specific distribution of the P2Y4 receptor in enteric glial cells and int... Region-specific distribution of the P2Y4 receptor in enteric glial cells and interstitial cells of Cajal within the guinea-pig gastrointestinal tract.Auton Neurosci. 2006 Jun 30 ;126-127:299-306. Epub 2006 Apr 17 . PubMed2006[pdat] AND Costagliola A[author] (2) PubMedCoexistence of non-adrenergic non-cholinergic inhibitory and excitatory neurotra... Coexistence of non-adrenergic non-cholinergic inhibitory and excitatory neurotransmitters in a large neuronal subpopulation in the vaginal segment of the chicken oviduct.Auton Neurosci. 2004 May 31 ;112(1-2):37-48. PubMedYour browsing activity is empty. Activity recording is turned off. Turn recording back on See more... 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