2013
Activation of AMPK Inhibits Cholera Toxin Stimulated Chloride Secretion in Human and Murine Intestine
Rogers AC, Huetter L, Hoekstra N, Collins D, Collaco A, Baird AW, Winter DC, Ameen N, Geibel JP, Kopic S. Activation of AMPK Inhibits Cholera Toxin Stimulated Chloride Secretion in Human and Murine Intestine. PLOS ONE 2013, 8: e69050. PMID: 23935921, PMCID: PMC3728293, DOI: 10.1371/journal.pone.0069050.Peer-Reviewed Original ResearchConceptsIntestinal chloride secretionCholera toxinChloride secretionPharmacological activationFluid accumulationColonic cryptsSupplemental treatment strategyAcute diarrheal illnessChloride effluxCystic fibrosis transmembrane conductance regulatorExcised intestinal segmentsRat colonic cryptsMurine colonic mucosaMucosal sheetsDiarrheal illnessIntestinal loopsEnterotoxigenic diarrheaColonic mucosaTreatment strategiesIntestinal segmentsUssing chambersAMPK activator AICARMurine intestineTissue levelsMetformin
2012
Effect of the AMP-Kinase Modulators AICAR, Metformin and Compound C on Insulin Secretion of INS-1E Rat Insulinoma Cells under Standard Cell Culture Conditions
Langelueddecke C, Jakab M, Ketterl N, Lehner L, Hufnagl C, Schmidt S, Geibel JP, Fuerst J, Ritter M. Effect of the AMP-Kinase Modulators AICAR, Metformin and Compound C on Insulin Secretion of INS-1E Rat Insulinoma Cells under Standard Cell Culture Conditions. Cellular Physiology And Biochemistry 2012, 29: 75-86. PMID: 22415077, DOI: 10.1159/000337589.Peer-Reviewed Original ResearchConceptsAMP-dependent protein kinaseCompound CStandard cell culture conditionsCell culture conditionsINS-1E rat insulinoma cellsAMPK phosphorylationAMPK inhibitor compound CCulture conditionsCell membrane potentialAMPK-independent mechanismCell metabolic stateInhibitor compound CINS-1E cellsMetabolic stateMembrane potentialStimulus-secretion couplingBasal AMPK phosphorylationΒ-cell survivalCell cycle arrestProtein kinaseΒ-cell line INS-1E.Nutrient uptakeAMPK activatorCell cycle distributionInsulin secretion
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
2001
Cloning and Expression of a Chloride-dependent Na+-H+ Exchanger*
Sangan P, Rajendran VM, Geibel JP, Binder HJ. Cloning and Expression of a Chloride-dependent Na+-H+ Exchanger*. Journal Of Biological Chemistry 2001, 277: 9668-9675. PMID: 11773056, DOI: 10.1074/jbc.m110852200.Peer-Reviewed Original ResearchMeSH KeywordsAmilorideAmino Acid SequenceAnimalsBlotting, NorthernCell LineChlorineCloning, MolecularColonDiureticsDNA, ComplementaryFibroblastsHydrogen-Ion ConcentrationIn Situ HybridizationMaleMolecular Sequence DataPhosphorylationProtein Structure, TertiaryRatsRats, Sprague-DawleyRNA, MessengerSequence Homology, Amino AcidSodiumSodium-Hydrogen Exchanger 1Sodium-Hydrogen ExchangersTime FactorsTissue DistributionConceptsRat distal colonDistal colonAmino acidsCrypt cellsExchange isoformsDietary sodium depletionColonic crypt cellsFull-length cDNACl- channel blockerColonic epithelial cellsN-terminal regionNorthern blot analysisSodium depletionChannel blockersNovel C-terminusPutative transmembranePS120 fibroblastsAcid loadDependent intracellularC-terminusNHE-1Epithelial cellsIsoform inhibitorAmiloride analoguesMultiple tissues
1997
LOCALIZATION OF SH‐PTP1 TO SYNAPTIC VESICLES: A POSSIBLE ROLE IN NEUROTRANSMISSION
JENA B, WEBSTER P, GEIBEL J, VAN DEN POL A, SRITHARAN K. LOCALIZATION OF SH‐PTP1 TO SYNAPTIC VESICLES: A POSSIBLE ROLE IN NEUROTRANSMISSION. Cell Biology International 1997, 21: 469-476. PMID: 9451803, DOI: 10.1006/cbir.1997.0185.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBlotting, WesternHypothalamusIntracellular Signaling Peptides and ProteinsMicroscopy, ImmunoelectronNerve Tissue ProteinsNeuronsPhosphorylationProtein Processing, Post-TranslationalProtein Tyrosine Phosphatase, Non-Receptor Type 11Protein Tyrosine Phosphatase, Non-Receptor Type 6Protein Tyrosine PhosphatasesProto-Oncogene Proteins pp60(c-src)RatsRats, Sprague-DawleySynaptic TransmissionSynaptic VesiclesSynaptophysinCyclic strain induces reorganization of integrin α5β1 and α2β1 in human umbilical vein endothelial cells
Yano Y, Geibel J, Sumpio B. Cyclic strain induces reorganization of integrin α5β1 and α2β1 in human umbilical vein endothelial cells. Journal Of Cellular Biochemistry 1997, 64: 505-513. PMID: 9057108, DOI: 10.1002/(sici)1097-4644(19970301)64:3<505::aid-jcb17>3.0.co;2-e.Peer-Reviewed Original ResearchConceptsHuman umbilical vein endothelial cellsBeta 1 integrinUmbilical vein endothelial cellsVein endothelial cellsEndothelial cellsAlpha 5Beta 1Alpha 5 beta 1Alpha 2 beta 1 integrinH exposureBeta 3 integrinAlpha 2 integrinCycles/minEndothelial cell morphologyVariety of stimuliIntegrin alpha 5Tyrosine phosphorylationVitronectin receptorAlpha 2Redistribution of alphaEC subjectsBeta integrins
1996
Tyrosine phosphorylation of pp125FAK and paxillin in aortic endothelial cells induced by mechanical strain
Yano Y, Geibel J, Sumpio BE. Tyrosine phosphorylation of pp125FAK and paxillin in aortic endothelial cells induced by mechanical strain. American Journal Of Physiology 1996, 271: c635-c649. PMID: 8770005, DOI: 10.1152/ajpcell.1996.271.2.c635.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAortaCattleCell Adhesion MoleculesCell MovementCells, CulturedCytoskeletal ProteinsEndothelium, VascularFocal Adhesion Kinase 1Focal Adhesion Protein-Tyrosine KinasesGenisteinIsoflavonesNitrilesPaxillinPhosphoproteinsPhosphorylationPhosphotyrosineProtein-Tyrosine KinasesStress, MechanicalTissue DistributionTyrosineTyrphostins