2013
Gastric Acid, Calcium Absorption, and Their Impact on Bone Health
Kopic S, Geibel JP. Gastric Acid, Calcium Absorption, and Their Impact on Bone Health. Physiological Reviews 2013, 93: 189-268. PMID: 23303909, DOI: 10.1152/physrev.00015.2012.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntacidsBone and BonesBone Diseases, MetabolicCalcitoninCalciumGastric AcidGastric MucosaHistamine H2 AntagonistsHomeostasisHumansHydrogen-Ion ConcentrationIntestinal AbsorptionIntestinal MucosaIntestinesParathyroid HormoneProton Pump InhibitorsReceptors, Calcium-SensingSignal TransductionVitamin DConceptsBone healthCalcium absorptionIntestinal calcium absorptionGastric acid secretionSystemic calcium homeostasisAdequate intestinal absorptionGastric acidityCalcium balanceGastric acidAcid secretionIntestinal absorptionCalcium homeostasisNeuroendocrine regulationCalcium uptakePhysiological processesPhysiological basisPotential linkHealthSecretionIntestine
2009
The Phytostilbene Resveratrol Induces Apoptosis in INS-1E Rat Insulinoma Cells
Bortolotti C, Kunit T, Moder A, Hufnagl C, Schmidt S, Hartl A, Langelueddecke C, Fürst J, Geibel J, Ritter M, Jakab M. The Phytostilbene Resveratrol Induces Apoptosis in INS-1E Rat Insulinoma Cells. Cellular Physiology And Biochemistry 2009, 23: 245-254. PMID: 19471092, DOI: 10.1159/000218171.Peer-Reviewed Original ResearchConceptsINS-1E rat insulinoma cellsINS-1E cellsApoptotic volume decreaseRat insulinoma cellsAkt phosphorylationInsulinoma cellsCell proliferationProapoptotic effectsInhibitor compound CBasal Akt phosphorylationExposure of phosphatidylserineInduction of apoptosisG0/G1 phaseCaspase activationPlasma membraneOuter leafletCompound CMuM resveratrolG1 phaseCrystal violet stainingApoptotic cellsCell granularityAddition of insulinPhosphorylationMajor target
2007
Stimulatory Pathways of the Calcium-Sensing Receptor on Acid Secretion in Freshly Isolated Human Gastric Glands
Remy C, Kirchhoff P, Hafner P, Busque S, Mueller M, Geibel J, Wagner C. Stimulatory Pathways of the Calcium-Sensing Receptor on Acid Secretion in Freshly Isolated Human Gastric Glands. Cellular Physiology And Biochemistry 2007, 19: 33-42. PMID: 17310098, DOI: 10.1159/000099190.Peer-Reviewed Original ResearchConceptsHeterotrimeric G proteinsHuman gastric glandsMAP kinaseGastric parietal cellsATPase activityG proteinsGastric acid secretionERK 1/2 MAP kinaseIndependent PKC isoformsStimulation of CaSRERK1/2 MAP kinasesAcid secretionProtein kinase CPKC-delta isoformParietal cellsStimulatory effectChelator of intracellularActivation of PKCGastric glandsHuman gastric parietal cellsPLC inhibitor U73122Sensitive heterotrimeric G proteinsPD 098059General inhibitorPKC isoforms
2006
Somatostatin modulates PI3K-Akt, eNOS and NHE activity in the ciliary epithelium
Ghosh S, Choritz L, Geibel J, Coca-Prados M. Somatostatin modulates PI3K-Akt, eNOS and NHE activity in the ciliary epithelium. Molecular And Cellular Endocrinology 2006, 253: 63-75. PMID: 16764985, DOI: 10.1016/j.mce.2006.05.002.Peer-Reviewed Original ResearchConceptsP-Akt Ser473Ciliary epitheliumIntracellular cyclic GMP productionInvolvement of somatostatinDose-dependent attenuationReceptor mRNA expressionCyclic GMP productionSST-like immunoreactivityLack of responseOcular ciliary epitheliumAqueous humorSomatostatinNHE activityExchanger activityMRNA expressionCiliary processesNeuroendocrine cellsPC2 antibodyPI3K-AktMultiple intracellularGMP productionConvertases PC1Increases phosphorylationTissue extractsEpithelium
1997
A Tyrosine-Based Signal Targets H/K-ATPase to a Regulated Compartment and Is Required for the Cessation of Gastric Acid Secretion
Courtois-Coutry N, Roush D, Rajendran V, McCarthy J, Geibel J, Kashgarian M, Caplan M. A Tyrosine-Based Signal Targets H/K-ATPase to a Regulated Compartment and Is Required for the Cessation of Gastric Acid Secretion. Cell 1997, 90: 501-510. PMID: 9267030, DOI: 10.1016/s0092-8674(00)80510-3.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCalciumCOS CellsCytomegalovirusDNA PrimersEndocytosisGastric AcidGastric MucosaH(+)-K(+)-Exchanging ATPaseMacromolecular SubstancesMiceMice, TransgenicMicroscopy, ImmunoelectronMutagenesis, Site-DirectedParietal Cells, GastricPolymerase Chain ReactionPromoter Regions, GeneticRecombinant ProteinsSignal TransductionTransfectionTyrosineConceptsK-ATPase beta subunitTyrosine-based signalsK-ATPaseTyrosine-based endocytosis signalTyrosine residuesBeta subunitIntracellular storage compartmentEndocytosis signalCytoplasmic tailMutant betaRegulated compartmentsSecrete acidResidue sequenceStorage compartmentCell surfaceCell plasmalemmaSubunitsTransgenic miceParietal cellsGastric glandsCompartmentsSecretionAcid secretionReinternalizationPlasmalemma
1993
Mechanism of apical K+ channel modulation in principal renal tubule cells. Effect of inhibition of basolateral Na(+)-K(+)-ATPase.
Wang W, Geibel J, Giebisch G. Mechanism of apical K+ channel modulation in principal renal tubule cells. Effect of inhibition of basolateral Na(+)-K(+)-ATPase. The Journal Of General Physiology 1993, 101: 673-694. PMID: 8393065, PMCID: PMC2216783, DOI: 10.1085/jgp.101.5.673.Peer-Reviewed Original ResearchConceptsEffect of inhibitionPump inhibitionInhibitory effectChannel activityProtein kinase CPump activityAddition of strophanthidinPatch-clamp techniqueRenal tubule cellsBath solutionCell-attached patchesExtracellular Ca2Removal of Ca2Intracellular Ca2MicroM ionomycinTubule cellsControl valuesLow-conductance K channelsPrincipal cellsChannel modulationK channelsInhibitionNM staurosporineDependent protein kinase CPotent inhibitor