2019
Design and implementation of novel nutraceuticals and derivatives for treating intestinal disorders
Barahona MJ, Baratta V, Ollodart J, Mulligan D, Geibel JP. Design and implementation of novel nutraceuticals and derivatives for treating intestinal disorders. Future Medicinal Chemistry 2019, 11: 847-855. PMID: 30994367, PMCID: PMC8008207, DOI: 10.4155/fmc-2018-0313.Peer-Reviewed Original ResearchConceptsSignificant worldwide disease burdenSpectrum of illnessWorldwide disease burdenIntestinal fluid secretionSystemic side effectsCalcium-sensing receptorNovel therapeutic targetG protein-coupled receptorsSurgical therapyPharmaceutical optionsMucosal integrityDisease burdenIntestinal disordersNutraceutical therapyGastrointestinal diseasesGastrointestinal illnessSide effectsTherapeutic targetFluid secretionIntestinal cellsTherapyAdverse effectsNovel nutraceuticalsCaSRIllness
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
Stomach 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
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 membrane
2010
The calcium-sensing receptor.
Geibel JP. The calcium-sensing receptor. Journal Of Nephrology 2010, 23 Suppl 16: s130-5. PMID: 21170870.Peer-Reviewed Original ResearchConceptsCalcium-sensing receptorExtracellular environmentReceptor-targeted drugsThick ascending limbFiltered loadAscending limbNephron segmentsAmino acidsHandling of waterReceptorsImportant roleBasic physiologyImportant memberSalt absorptionRecent studiesDivalent ion concentrationSalinityCalciumIonic absorptionCaSR
2005
The calcium-sensing receptor acts as a modulator of gastric acid secretion in freshly isolated human gastric glands
Dufner MM, Kirchhoff P, Remy C, Hafner P, Müller M, Cheng SX, Tang LQ, Hebert SC, Geibel JP, Wagner CA. The calcium-sensing receptor acts as a modulator of gastric acid secretion in freshly isolated human gastric glands. AJP Gastrointestinal And Liver Physiology 2005, 289: g1084-g1090. PMID: 16109841, DOI: 10.1152/ajpgi.00571.2004.Peer-Reviewed Original ResearchConceptsHuman gastric glandsHistamine-induced activationGastric acid secretionGastric glandsExtracellular divalent cationsParietal cellsAcid secretionIsolated rat gastric glandsRelease of acetylcholineCalcium-sensing receptorEnterochromaffin-like cellsAbsence of histamineExtracellular divalent cation concentrationFunctional CaSRATPase activityVagus nerveNeuronal pathwaysRat gastric glandsFura-2Human patientsCaSRFluo-4Sustained increaseCalcium measurementsHistaminel-Type amino acids stimulate gastric acid secretion by activation of the calcium-sensing receptor in parietal cells
Busque SM, Kerstetter JE, Geibel JP, Insogna K. l-Type amino acids stimulate gastric acid secretion by activation of the calcium-sensing receptor in parietal cells. AJP Gastrointestinal And Liver Physiology 2005, 289: g664-g669. PMID: 15961860, DOI: 10.1152/ajpgi.00096.2005.Peer-Reviewed Original ResearchConceptsCalcium-sensing receptorAbsence of secretagoguesAcid secretionParietal cellsHistamine-2 receptorSystem L amino acid transportGastric acid secretionWhole stomach preparationDose-dependent increaseIndividual parietal cellsStomach preparationRat gastric glandsHEK-293 cellsCaSRL-amino acidsGastric glandsHormonal stimulationATPase activitySecretionPhysiological concentrationsReceptorsSecretagoguesAcid transportAmino acidsSecretory cells
2002
Expression of calcium-sensing receptor in rat colonic epithelium: evidence for modulation of fluid secretion
Cheng SX, Okuda M, Hall AE, Geibel JP, Hebert SC. Expression of calcium-sensing receptor in rat colonic epithelium: evidence for modulation of fluid secretion. AJP Gastrointestinal And Liver Physiology 2002, 283: g240-g250. PMID: 12065312, DOI: 10.1152/ajpgi.00500.2001.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiological TransportBody FluidsCalciumCell LineCell MembraneColonHumansIn Vitro TechniquesIntestinal MucosaIntracellular MembranesMalePhosphatidylinositol Diacylglycerol-LyaseRatsRats, Sprague-DawleyReceptors, Calcium-SensingReceptors, Cell SurfaceTranscription, GeneticType C PhospholipasesConceptsCalcium-sensing receptorCrypt cellsFluid secretionNet fluid secretionIntestinal fluid transportRat colonic epitheliumCaSR agonistsIntracellular calciumExtracellular calciumColonic epitheliumDiarrheal diseaseCaSR transcriptsBath perfusateStimulatory effectBody cellsSecretionReceptorsCryptsElevated cAMPBasolateral surfaceCellsDivalent mineralsCalciumCaSRAgonists