2022
Gastric secretions
Geibel J. Gastric secretions. 2022, 313-333. DOI: 10.1002/9781119600206.ch17.Peer-Reviewed Original Research
2019
Induction of Secretagogue Independent Gastric Acid Secretion via a Novel Aspirin-Activated Pathway
Kitay AM, Ferstl FS, Link A, Geibel JP. Induction of Secretagogue Independent Gastric Acid Secretion via a Novel Aspirin-Activated Pathway. Frontiers In Physiology 2019, 10: 1264. PMID: 31649553, PMCID: PMC6795678, DOI: 10.3389/fphys.2019.01264.Peer-Reviewed Original ResearchGastric acid secretionNon-selective NOS inhibitor L-NAMENOS inhibitor L-NAMEInhibitor L-NAMEAcid secretionL-NAMESoluble guanylyl cyclase inhibitor 1HGuanylyl cyclase inhibitor 1HIncreases nitric oxide productionUsage of aspirinGastric glandsPH-sensitive dye BCECF-AMNitric oxide productionVariety of cancersNovel secretagogueBlood clot formationAspirin exposureChronic conditionsMucosal barrierRepetitive dosesUlcer formationAspirin consumptionBasolateral exposureAspirinClot formation
2018
Modulations in extracellular calcium lead to H+-ATPase-dependent acid secretion: a clarification of PPI failure
Kitay AM, Schneebacher MT, Schmitt A, Heschl K, Kopic S, Alfadda T, Alsaihati A, Link A, Geibel J. Modulations in extracellular calcium lead to H+-ATPase-dependent acid secretion: a clarification of PPI failure. AJP Gastrointestinal And Liver Physiology 2018, 315: g36-g42. PMID: 29517927, DOI: 10.1152/ajpgi.00132.2017.Peer-Reviewed Original ResearchConceptsAcid secretionParietal cellsExtracellular calciumGastric parietal cellsProton pump inhibitor exposureExtracellular CaPotassium-free conditionsRecurrent reflux symptomsCalcium sensing receptorGastric acid secretionPPI failurePPI therapyReflux symptomsIsolated gastric glandsInhibitor exposureCalcimimetic R568Pharmacological targetsSensing receptorAbsence of sodiumCalcium concentrationCaSRGastric glandsSecretionATPase activityExcretion pathway
2017
Activation of Secretagogue Independent Gastric Acid Secretion via Endothelial Nitric Oxide Synthase Stimulation in Rats
Kitay AM, Link A, Geibel JP. Activation of Secretagogue Independent Gastric Acid Secretion via Endothelial Nitric Oxide Synthase Stimulation in Rats. Cellular Physiology And Biochemistry 2017, 44: 1606-1615. PMID: 29212068, DOI: 10.1159/000485755.Peer-Reviewed Original ResearchConceptsNitric oxide synthaseGastric acid secretionAcid secretionL-arginineL-NAMENO/sGC/cGMP pathwayNitric oxideSGC/cGMP pathwayParietal cellsNitric oxide synthase stimulationSGC inhibitor ODQL-arginine exposureAcid-related diseasesPossible intracellular mechanismsNovel secretagogueRat parietal cellsIsolated gastric glandsUlcer diseaseOxide synthaseCGMP pathwayImmune functionImportant mediatorIntracellular mechanismsSecretionGastric glandsStomach and Bone
Kitay AM, Geibel JP. Stomach and Bone. Advances In Experimental Medicine And Biology 2017, 1033: 97-131. PMID: 29101653, DOI: 10.1007/978-3-319-66653-2_6.Peer-Reviewed Original ResearchConceptsBone metabolismGastric acid secretionCalcium-sensing receptorVitamin DParathyroid glandsAcid secretionGastrointestinal organsTherapeutic implicationsEndocrine modulatorsCalcium homeostasisDiseaseStomachOrgansMetabolismImportant playersIntermediary organDiverse tissuesDysfunctionCaSRPTHCalcitoninKidneySecretionIntestineReceptorsChapter 2 Molecular Aspects of the Calcium-Sensing Receptor and Calcium Homeostasis
Alkukhun A, Munoz-Abraham A, Judeeba S, Geibel J. Chapter 2 Molecular Aspects of the Calcium-Sensing Receptor and Calcium Homeostasis. 2017, 15-26. DOI: 10.1016/b978-0-12-802168-2.00002-6.ChaptersCalcium homeostasisImmune barrier functionCalcium sensing receptorGastric acid secretionCalcium-sensing receptorExtracellular calcium levelsVitamin DAntidiarrheal effectBile flowHormone secretionParathyroid glandsImmune responseGastrointestinal tractAcid secretionIntestinal floraElectrolyte balanceCalcium levelsBone mineralizationBarrier functionCaSROsteoclast proliferationKey modulatorReceptorsSecretionPhysiological functions
2016
Secretagogue-dependent and -independent transport of zinc hydration forms in rat parietal cells
Ferstl FS, Kitay AM, Trattnig RM, Alsaihati A, Geibel JP. Secretagogue-dependent and -independent transport of zinc hydration forms in rat parietal cells. Pflügers Archiv - European Journal Of Physiology 2016, 468: 1877-1883. PMID: 27757581, DOI: 10.1007/s00424-016-1889-3.Peer-Reviewed Original ResearchConceptsGastroesophageal reflux diseaseAcid secretionParietal cellsSecretagogue-stimulated acid secretionRecurrence of symptomsAlternative treatment optionNumber of patientsNon-fasted conditionsApplication of bumetanideEffects of secretagoguesRat parietal cellsReflux diseaseInhibitor therapyTreatment optionsNon-fasted animalsLeading causeNeuronal activationNKCC1 transporterNeuronal pathwaysGastric acidInhibitor bumetanideSecretagogue carbacholFasted animalsMechanism of entryHormonal activation
2014
Kir1.1 (ROMK) and Kv7.1 (KCNQ1/KvLQT1) are essential for normal gastric acid secretion: importance of functional Kir1.1
Vucic E, Alfadda T, MacGregor GG, Dong K, Wang T, Geibel JP. Kir1.1 (ROMK) and Kv7.1 (KCNQ1/KvLQT1) are essential for normal gastric acid secretion: importance of functional Kir1.1. Pflügers Archiv - European Journal Of Physiology 2014, 467: 1457-1468. PMID: 25127675, DOI: 10.1007/s00424-014-1593-0.Peer-Reviewed Original ResearchConceptsGastric parietal cellsPotassium channelsParietal cellsΒ-subunitKir1.1 channelsWild-type miceSecretagogue-stimulated gastric acid secretionApical poleGastric glandsLeak pathwayPotential therapeutic targetKir1.1Proton secretionRegulatory characteristicsKv7.1Therapeutic targetATPaseCell numberParietal cell numberCellsNormal gastric acid secretionSecretionInhibitorsAcid secretionMice
2013
The calcium sensing receptor modulates fluid reabsorption and acid secretion in the proximal tubule
Capasso G, Geibel PJ, Damiano S, Jaeger P, Richards WG, Geibel JP. The calcium sensing receptor modulates fluid reabsorption and acid secretion in the proximal tubule. Kidney International 2013, 84: 277-284. PMID: 23615500, DOI: 10.1038/ki.2013.137.Peer-Reviewed Original ResearchMeSH KeywordsAcid-Base EquilibriumAnimalsCalcimimetic AgentsCalciumHydrogen-Ion ConcentrationIn Vitro TechniquesKidney Tubules, ProximalMaleMiceMice, KnockoutNuclear ProteinsPerfusionPuncturesRatsRats, Sprague-DawleyReceptors, Calcium-SensingReceptors, G-Protein-CoupledSodium-Hydrogen ExchangersTranscription FactorsConceptsProximal tubulesLuminal calcium concentrationFluid reabsorptionAcid secretionKnockout miceCalcium ion concentrationCalcium concentrationRole of CaSRActivation of CaSRCalcium sensing receptorCalcium-sensing receptorMouse proximal tubulesProton secretionSodium-hydrogen exchangerCalcimimetic agentBicarbonate absorptionSensing receptorCaSRFluid absorptionSecretionReabsorptionMiceCalcimimeticsTubulesLuminal membraneGastric 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
2011
Vacuolar-type H+-ATPase-mediated proton transport in the rat parietal cell
Kopic S, Wagner ME, Griessenauer C, Socrates T, Ritter M, Geibel JP. Vacuolar-type H+-ATPase-mediated proton transport in the rat parietal cell. Pflügers Archiv - European Journal Of Physiology 2011, 463: 419-427. PMID: 22146938, DOI: 10.1007/s00424-011-1060-0.Peer-Reviewed Original ResearchConceptsV-ATPase activityV-ATPaseAcid secretionParietal cellsRat parietal cellsProton pump inhibitor therapyCertain specialized cellsK-ATPaseProton transportVacuolar-type H-ATPaseK-ATPase inhibitionSecretion pathwayTrafficking mechanismsSpecialized cellsMicrotubule networkActive acidificationInhibitor therapyIntracellular organellesK-ATPase activityRat gastric glandsConcanamycin APharmacological inhibitionAcid loadIntracellular alkalinizationAcid breakthrough
2010
CaSR Mediated Gastric Acid Secretion via the Vacuolar H+-ATPase - With Special Emphasis on the Effect of Extracellular Calcium and Changes in Systemic pH
Schmitt A, Bloecker K, Geibel J. CaSR Mediated Gastric Acid Secretion via the Vacuolar H+-ATPase - With Special Emphasis on the Effect of Extracellular Calcium and Changes in Systemic pH. The American Journal Of Gastroenterology 2010, 105: s41. DOI: 10.14309/00000434-201010001-00109.Peer-Reviewed Original ResearchInsulin Antagonizes Glucose-Induced Gastric Acid Secretion via the AMP Kinase - A Reason for the High Prevalence of Peptic Ulcer Disease and GERD in DM 2?
von Keudell A, Lehmann R, Kopic S, Murek M, Boroumand R, Geibel J. Insulin Antagonizes Glucose-Induced Gastric Acid Secretion via the AMP Kinase - A Reason for the High Prevalence of Peptic Ulcer Disease and GERD in DM 2? The American Journal Of Gastroenterology 2010, 105: s37. DOI: 10.14309/00000434-201010001-00097.Peer-Reviewed Original ResearchZinc Salts Provide a Novel, Prolonged and Rapid Inhibition of Gastric Acid Secretion
Kirchhoff P, Socrates T, Sidani S, Duffy A, Breidthardt T, Grob C, Viehl CT, Beglinger C, Oertli D, Geibel JP. Zinc Salts Provide a Novel, Prolonged and Rapid Inhibition of Gastric Acid Secretion. The American Journal Of Gastroenterology 2010, 106: 62. PMID: 20736941, DOI: 10.1038/ajg.2010.327.Peer-Reviewed Original ResearchConceptsProton pump inhibitorsGastric acid secretionAcid secretionRat gastric glandsRandomized cross-over studyIntact rat stomachAcid suppression therapyGastric glandsCross-over studyOnset of actionLong-term efficacyReturn of symptomsHealthy human volunteersSecretagogue-induced acid secretionStomach acid secretionProlonged therapySuppression therapyIntragastric pHPump inhibitorsSingle doseWhole stomachLifetime prevalenceRat modelRat stomachFaster onsetEthanol Inhibits Gastric Acid Secretion in Rats Through Increased AMP-Kinase Activity
Kopic S, Corradini S, Sidani S, Murek M, Vardanyan A, Föller M, Ritter M, Geibel JP. Ethanol Inhibits Gastric Acid Secretion in Rats Through Increased AMP-Kinase Activity. Cellular Physiology And Biochemistry 2010, 25: 195-202. PMID: 20110680, DOI: 10.1159/000276553.Peer-Reviewed Original ResearchConceptsGastric acid secretionAcid secretionSecretagogue-induced acid secretionInhibits gastric acid secretionShort-term ethanol exposurePH-sensitive dye BCECFLow-dose ethanolCompound CAMPK inhibitor compound CSpecific AMPK inhibitor compound CEffects of ethanolInhibitor compound CEthanol exposureRat gastric glandsActivation of AMPKInteraction of ethanolRat gastric parietal cellsFluorescence digital imagingGastric parietal cellsAMP kinase activityDye BCECFInhibitory effectSecretionParietal cellsAMPK pathway
2009
The Functions and Roles of the Extracellular Ca2+–Sensing Receptor along the Gastrointestinal Tract
Geibel JP, Hebert SC. The Functions and Roles of the Extracellular Ca2+–Sensing Receptor along the Gastrointestinal Tract. Annual Review Of Physiology 2009, 71: 205-217. PMID: 19575679, DOI: 10.1146/annurev.physiol.010908.163128.Peer-Reviewed Original ResearchConceptsGastrointestinal tractNormal gut physiologyNutrient availabilityDigestion of foodRapid turnoverAmino acidsColonic fluid transportFunctional digestive tractGastric acid secretionCalcium-sensing receptorOrganic nutrientsWater homeostasisEntire gastrointestinal tractPotent targetGut physiologyEpithelial cellsIntestinal epitheliumSecretory diarrheaAcid secretionDigestive tractExtracellular Ca2Colon cancerReceptorsNormal saltFluid secretion
2007
SLC26A7 Can function as a chloride-loading mechanism in parietal cells
Kosiek O, Busque SM, Föller M, Shcheynikov N, Kirchhoff P, Bleich M, Muallem S, Geibel JP. SLC26A7 Can function as a chloride-loading mechanism in parietal cells. Pflügers Archiv - European Journal Of Physiology 2007, 454: 989-998. PMID: 17404755, DOI: 10.1007/s00424-007-0254-y.Peer-Reviewed Original ResearchMeSH Keywords4,4'-Diisothiocyanostilbene-2,2'-Disulfonic AcidAnimalsAntiportersChloride-Bicarbonate AntiportersChloridesFluorescent Antibody TechniqueGastric AcidGastric MucosaImage Processing, Computer-AssistedIn Vitro TechniquesMaleOocytesParietal Cells, GastricPatch-Clamp TechniquesRatsRats, Sprague-DawleySodiumSodium-Potassium-Chloride SymportersSolute Carrier Family 12, Member 2Sulfate TransportersXenopusConceptsParietal cellsXenopus laevis oocyte expression systemRat parietal cellsExpression of SLC26A7Rat gastric glandsAcid secretionOocyte expression systemNKCC inhibitorWestern blotHistamine stimulationPharmacological inhibitorsAcidic pHiGastric glandsDIDS concentrationExchanger AE2Subsequent readditionTransporter activityDisulfonic acidInhibitorsCellsSLC26A7InfluxImmunohistochemistrySecretagoguesUptake systemStimulatory 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 isoformsEthanol inhibits gastric acid secretion in rats through increased AMP‐K activity
Corradini S, Kopic S, Ritter M, Geibel J. Ethanol inhibits gastric acid secretion in rats through increased AMP‐K activity. The FASEB Journal 2007, 21: a1317-a1317. DOI: 10.1096/fasebj.21.6.a1317-c.Peer-Reviewed Original ResearchSecretagogue-induced acid secretionAcid secretionRate of alkalinizationLow-dose ethanol exposureCompound CPH-sensitive dye BCECFLow-dose ethanolGastric acid secretionInhibitor compound CEthanol exposureRat gastric glandsVariety of cellsNH4Cl prepulseRat gastric parietal cellsGastric parietal cellsSecretagogue carbacholPotent modulatorDye BCECFInhibitory effectParietal cellsSecretionGastric glandsAMP kinasePresent studyGlandPI3 Kinase Dependent Stimulation of Gastric Acid Secretion by Dexamethasone
Lang P, Schniepp R, Kirchhoff P, Socrates T, Sidani S, Geibel J. PI3 Kinase Dependent Stimulation of Gastric Acid Secretion by Dexamethasone. Cellular Physiology And Biochemistry 2007, 20: 527-534. PMID: 17762179, DOI: 10.1159/000107536.Peer-Reviewed Original ResearchMeSH KeywordsAndrostadienesAnimalsCimetidineDexamethasoneGastric AcidGastric MucosaH(+)-K(+)-Exchanging ATPaseMaleNitrobenzoatesPhosphatidylinositol 3-KinasesPhosphoinositide-3 Kinase InhibitorsPotassium Channel BlockersProtein Kinase InhibitorsProton Pump InhibitorsRatsRats, Sprague-DawleyStaurosporineWortmanninConceptsGastric acid secretionProtein kinase inhibitor staurosporinePI3-kinase inhibitor wortmanninAcid secretionKinase inhibitor staurosporineKinase inhibitor wortmanninPI3-kinase pathwayPeptic ulcerDexamethasone effectApical Cl- channelsKinase pathwayInhibitor wortmanninInhibitor staurosporineExcessive gastric acid secretionProton extrusionATPase inhibitor omeprazoleCl- channel blockers NPPBCl- channelsChannel blocker NPPBDependent stimulationDexamethasone injectionVivo pretreatmentInhibitor omeprazoleParietal cellsSecretion