2022
L-ARGININE PREVENTS ISCHEMIC INJURY IN EXPLANTED RAT INTESTINAL REGIONS IN AN EX VIVO PERFUSION MODEL
Finotti M, Barahona M, Maina R, Lysyy T, Agarwal R, Schmitt P, Caturegli G, Di Renzo C, Anselmo A, Mulligan D, Geibel J, D'Amico F. L-ARGININE PREVENTS ISCHEMIC INJURY IN EXPLANTED RAT INTESTINAL REGIONS IN AN EX VIVO PERFUSION MODEL. Transplantation Reports 2022, 7: 100096. DOI: 10.1016/j.tpr.2022.100096.Peer-Reviewed Original ResearchIschemic injuryIntestinal segmentsIschemic damageIntraluminal perfusionNitric oxide-arginine pathwayMale Sprague-Dawley ratsN-nitroarginine methyl esterSprague-Dawley ratsEx vivo perfusion modelVivo perfusion modelNon-ischemic conditionsSmall intestinal segmentsFITC-inulinExtraluminal sideL-NAMEReperfusion injuryProtective effectL-arginineSmall intestinePerfusion modelInjuryIntestinal regionsFluid secretionReduced susceptibilityPerfusion
2019
The calcium‐sensing receptor: A novel target for treatment and prophylaxis of neratinib‐induced diarrhea
Lysyy T, Lalani AS, Olek EA, Diala I, Geibel JP. The calcium‐sensing receptor: A novel target for treatment and prophylaxis of neratinib‐induced diarrhea. Pharmacology Research & Perspectives 2019, 7: e00521. PMID: 31523434, PMCID: PMC6743423, DOI: 10.1002/prp2.521.Peer-Reviewed Original ResearchConceptsTyrosine kinase inhibitorsCaSR activationCalcium-sensing receptorDose-dependent mannerFluid secretionRat intestineHER2-positive breast cancerKinase inhibitorsAdverse effectsChemotherapy-associated diarrheaNeratinib-induced diarrheaCommon side effectsIsolated intestinal segmentsPotent therapeutic targetIrreversible panPatients' qualityBreast cancerIntestinal segmentsSide effectsTherapeutic targetDiarrheaPronounced elevationIntraluminal calcium concentrationVivo modelNeratinibActivation of the Calcium Sensing Receptor Decreases Secretagogue-Induced Fluid Secretion in the Rat Small Intestine
Barahona MJ, Maina RM, Lysyy T, Finotti M, Caturegli G, Baratta V, D’Amico F, Mulligan D, Geibel JP. Activation of the Calcium Sensing Receptor Decreases Secretagogue-Induced Fluid Secretion in the Rat Small Intestine. Frontiers In Physiology 2019, 10: 439. PMID: 31130866, PMCID: PMC6509940, DOI: 10.3389/fphys.2019.00439.Peer-Reviewed Original ResearchPresence of forskolinFluid secretionSmall intestineAC-265347Fluid absorptionIntestinal fluid secretionCalcium-sensing receptorSprague-Dawley ratsNew therapeutic targetsNet fluid absorptionDose-dependent mannerRat small intestineMM CaAbsence of forskolinMammalian gastrointestinal tractFluid hypersecretionDiarrheal illnessIntraluminal perfusionPotent secretagogueDawley ratsGastrointestinal tractCaSR activatorsElectrolyte balanceTherapeutic targetLuminal perfusateDesign 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
2016
Use of Fluorescein Isothiocyanate-Inulin as a Marker for Intestinal Ischemic Injury
AlKukhun A, Caturegli G, Munoz-Abraham AS, Judeeba S, Patron-Lozano R, Morotti R, Rodriguez-Davalos MI, Geibel JP. Use of Fluorescein Isothiocyanate-Inulin as a Marker for Intestinal Ischemic Injury. Journal Of The American College Of Surgeons 2016, 224: 1066-1073. PMID: 28017811, DOI: 10.1016/j.jamcollsurg.2016.12.016.Peer-Reviewed Original ResearchConceptsFluorescein isothiocyanate-inulinIschemic injuryIntestinal ischemiaIntestinal transplantationFluid secretionIntestinal ischemic injuryIntestinal tissue samplesSmall intestine segmentsHEPES-Ringer solutionIntestinal graftMesenteric ischemiaIschemic intestineHistopathologic samplesExperimental armControl armControl intestineIschemic stateBlinded pathologistIschemiaIntestinal lumenIntestinal tissueIntestine segmentsScoring systemFluid shiftsInjury
2010
Evidence for intestinal chloride secretion
Murek M, Kopic S, Geibel J. Evidence for intestinal chloride secretion. Quarterly Journal Of Experimental Physiology And Cognate Medical Sciences 2010, 95: 471-478. PMID: 20233891, DOI: 10.1113/expphysiol.2009.049445.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsChloride ChannelsChloridesCLC-2 Chloride ChannelsCystic Fibrosis Transmembrane Conductance RegulatorDiarrheaEnterocytesHumansIntestinal AbsorptionIntestinal MucosaIntestinal SecretionsPotassium ChannelsSodium-Potassium-Chloride SymportersSodium-Potassium-Exchanging ATPaseTight JunctionsWater-Electrolyte Balance
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
2006
Calcium-sensing receptor abrogates secretagogue- induced increases in intestinal net fluid secretion by enhancing cyclic nucleotide destruction
Geibel J, Sritharan K, Geibel R, Geibel P, Persing JS, Seeger A, Roepke TK, Deichstetter M, Prinz C, Cheng SX, Martin D, Hebert SC. Calcium-sensing receptor abrogates secretagogue- induced increases in intestinal net fluid secretion by enhancing cyclic nucleotide destruction. Proceedings Of The National Academy Of Sciences Of The United States Of America 2006, 103: 9390-9397. PMID: 16760252, PMCID: PMC1475505, DOI: 10.1073/pnas.0602996103.Peer-Reviewed Original ResearchConceptsCalcium-sensing receptorCholera toxinFluid secretionNet fluid secretionSecretagogue-induced increasesIntestinal fluid transportCaSR agonistsSecretagogue actionUnique therapyCaSR signalingSecretory actionSecretory diarrheaReceptor activationIntestinal tractEpithelial cellsEnterotoxin STaReceptorsCyclic nucleotidesSecretionExtracellular milieuDiverse cellsToxinActivationCellsDiarrhea
2004
Extracellular polyamines regulate fluid secretion in rat colonic crypts via the extracellular calcium-sensing receptor
Cheng SX, Geibel JP, Hebert SC. Extracellular polyamines regulate fluid secretion in rat colonic crypts via the extracellular calcium-sensing receptor. Gastroenterology 2004, 126: 148-158. PMID: 14699496, DOI: 10.1053/j.gastro.2003.10.064.Peer-Reviewed Original ResearchConceptsCalcium-sensing receptorColonic epithelial cellsFluid secretionColonic cryptsCalcium-sensing receptor activationExtracellular calcium-sensing receptorEpithelial cellsIntracellular D-myo-inositolNormal postnatal developmentRat colonic cryptsExtracellular polyaminesDistal colonDistal colonic cryptsSecond messenger generationDistal colonic epithelial cellsGastrointestinal epitheliumSecond messenger accumulationPostnatal developmentReceptor activationExtracellular spermineIntact cryptsReceptorsColonocyte functionSecretionCrypts
2003
Polyamines interact with the Ca2+ sensing receptor (CaSR) to modulate fluid secretion by rat colonic epithelium
Cheng S, Geibel J, Hebert S. Polyamines interact with the Ca2+ sensing receptor (CaSR) to modulate fluid secretion by rat colonic epithelium. Gastroenterology 2003, 124: a609. DOI: 10.1016/s0016-5085(03)83087-1.Peer-Reviewed Original Research
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
2001
Na+-dependent fluid absorption in intact perfused rat colonic crypts
Geibel J, Rajendran V, Binder H. Na+-dependent fluid absorption in intact perfused rat colonic crypts. Gastroenterology 2001, 120: 144-150. PMID: 11208723, DOI: 10.1053/gast.2001.20890.Peer-Reviewed Original ResearchMeSH Keywords4,4'-Diisothiocyanostilbene-2,2'-Disulfonic AcidAnimalsBicarbonatesChloridesColonGanglionic StimulantsGlutamatesIn Vitro TechniquesIntestinal AbsorptionInulinIsotonic SolutionsMalePerfusionQuaternary Ammonium CompoundsRatsRats, Sprague-DawleyRinger's SolutionSodiumSodium-Hydrogen ExchangersTritiumConceptsNet fluid absorptionRat colonic cryptsCl- channel blockerFluid absorptionNeurohumoral stimulationChannel blockersColonic cryptsLumen ClAbsorptive processesInhibitor of NaCl(-) secretionAbstractTextCrypt cellsExchange inhibitorMicroperfusion techniqueFluid secretionL DIDSAmiloride analoguesMammalian colonSecretionAnion exchange inhibitorCryptsSignificant increaseAIMSSecretory process
2000
Cl‐Dependent Na‐H Exchange: A Novel Colonic Crypt Transport Mechanism
BINDER H, RAJENDRAN V, GEIBEL J. Cl‐Dependent Na‐H Exchange: A Novel Colonic Crypt Transport Mechanism. Annals Of The New York Academy Of Sciences 2000, 915: 43-53. PMID: 11193600, DOI: 10.1111/j.1749-6632.2000.tb05222.x.Peer-Reviewed Original Research
1997
Novel Transport Properties of Colonic Crypt Cells: Fluid Absorption and Cl-Dependent Na-H Exchange
Binder H, Singh S, Geibel J, Rajendran V. Novel Transport Properties of Colonic Crypt Cells: Fluid Absorption and Cl-Dependent Na-H Exchange. Comparative Biochemistry And Physiology Part A Molecular & Integrative Physiology 1997, 118: 265-269. PMID: 9366054, DOI: 10.1016/s0300-9629(97)00079-0.Peer-Reviewed Original ResearchConceptsNa-H exchangeCrypt cellsFluid absorptionLamina propria cellsColonic ion transportNet fluid secretionRat distal colonColonic crypt cellsPresence of myofibroblastsApical membrane vesiclesSecretory processRinger-like solutionDibutyryl cyclic AMPDistal colonCrypt preparationNeurohumoral agonistsAcid loadMorphologic techniquesFluid secretionGradient stimulationAbsorptive processesCyclic AMPIndividual cryptsMyofibroblastsBath solution
1995
Fluid absorption in isolated perfused colonic crypts.
Singh S, Binder H, Boron W, Geibel J. Fluid absorption in isolated perfused colonic crypts. Journal Of Clinical Investigation 1995, 96: 2373-2379. PMID: 7593625, PMCID: PMC185889, DOI: 10.1172/jci118294.Peer-Reviewed Original ResearchConceptsCrypt cellsNM vasoactive intestinal peptideFluid absorptionLarge intestinal functionColonic cryptsVasoactive intestinal peptideLamina propria cellsNet fluid secretionRat distal colonNet fluid absorptionDibutyryl cyclic AMPIntestinal peptideDistal colonIntestinal functionLamina propriaPathophysiological paradigmCrypt preparationMM acetylcholineBasal stateNeurohumoral agonistsFluid secretionCellular elementsEpithelial cellsIntestinal cryptsCrypts