2013
Carvedilol for preventing recurrent variceal bleeding: Waiting for convincing evidence
Bosch J, Groszmann R, Iwakiri Y, Taddei T. Carvedilol for preventing recurrent variceal bleeding: Waiting for convincing evidence. Hepatology 2013, 57: 1665-1667. PMID: 23359118, DOI: 10.1002/hep.26279.Peer-Reviewed Original ResearchCarvedilol groupSevere adverse eventsVariceal bleedingAdverse eventsVariceal rebleedingRecurrent bleedingI groupControl of acute esophageal variceal bleedingPrevention of gastroesophageal variceal rebleedingPreventing recurrent variceal bleedingAcute esophageal variceal bleedingDecrease portal pressureRecurrent upper gastrointestinal bleedingRecurrent variceal bleedingEsophageal variceal bleedingUpper gastrointestinal bleedingMedian followEsophageal varicesGastric varicesPortal pressureGastrointestinal bleedingIsosorbide mononitrateBleedingCarvedilolPatients
2012
Intestinal and plasma VEGF levels in cirrhosis: the role of portal pressure
Huang H, Haq O, Utsumi T, Sethasine S, Abraldes JG, Groszmann RJ, Iwakiri Y. Intestinal and plasma VEGF levels in cirrhosis: the role of portal pressure. Journal Of Cellular And Molecular Medicine 2012, 16: 1125-1133. PMID: 21801303, PMCID: PMC3213314, DOI: 10.1111/j.1582-4934.2011.01399.x.Peer-Reviewed Original ResearchConceptsPlasma VEGF levelsPortal pressureVEGF levelsPortal hypertensionIntestinal VEGFDevelopment of cirrhosisFibrosis/cirrhosisAge-matched controlsGroups of ratsEnd of exposureCirrhosisRatsSignificant positive correlationWeeksHypertensionVEGFInhalationPositive correlationDifferent stagesCarbon tetrachlorideLevelsPathologyControl
2011
Reticulon 4B (Nogo‐B) is a novel regulator of hepatic fibrosis
Zhang D, Utsumi T, Huang H, Gao L, Sangwung P, Chung C, Shibao K, Okamoto K, Yamaguchi K, Groszmann RJ, Jozsef L, Hao Z, Sessa WC, Iwakiri Y. Reticulon 4B (Nogo‐B) is a novel regulator of hepatic fibrosis. Hepatology 2011, 53: 1306-1315. PMID: 21480333, PMCID: PMC3667398, DOI: 10.1002/hep.24200.Peer-Reviewed Original ResearchConceptsBile duct ligationLiver fibrosisPortal pressureKO micePortal hypertensionReticulon 4BWT mice 4 weeksMice 4 weeksFibrosis/cirrhosisSham-operated controlsB knockout miceHepatic stellate cellsPotential therapeutic targetHuman liver sectionsAbsence of NogoGrowth factor β stimulationMechanism of NogoTGFβ/SMAD2WT miceVascular injuryHepatic fibrosisSham operationCirrhotic liverDuct ligationStellate cells
2006
Mild increases in portal pressure upregulate vascular endothelial growth factor and endothelial nitric oxide synthase in the intestinal microcirculatory bed, leading to a hyperdynamic state
Abraldes JG, Iwakiri Y, Loureiro-Silva M, Haq O, Sessa WC, Groszmann RJ. Mild increases in portal pressure upregulate vascular endothelial growth factor and endothelial nitric oxide synthase in the intestinal microcirculatory bed, leading to a hyperdynamic state. AJP Gastrointestinal And Liver Physiology 2006, 290: g980-g987. PMID: 16603731, DOI: 10.1152/ajpgi.00336.2005.Peer-Reviewed Original ResearchMeSH KeywordsAngiogenesis InhibitorsAnimalsEndothelium, VascularHypertension, PortalIndolesIntestinal MucosaIntestinesJejunumMaleMicrocirculationNeovascularization, PathologicNitric Oxide SynthaseNitric Oxide Synthase Type IIIPortal PressurePyrrolesRatsUp-RegulationVascular Endothelial Growth Factor AVasodilationConceptsEndothelial NO synthasePortal hypertensionPortal vein ligationHyperdynamic circulationPortal pressureENOS expressionMild increaseVEGF expressionUpregulates Vascular Endothelial Growth FactorNitric oxideEndothelial nitric oxide synthaseAdvanced portal hypertensionVascular endothelial growth factorNitric oxide synthaseEndothelial growth factorInhibition of VEGFHyperdynamic statePVL ratsSplanchnic hemodynamicsIntestinal microcirculationPortosystemic shuntingVein ligationSham ratsOxide synthaseNO synthase
2003
A liver-specific nitric oxide donor improves the intra-hepatic vascular response to both portal blood flow increase and methoxamine in cirrhotic rats
Loureiro-Silva MR, Cadelina GW, Iwakiri Y, Groszmann RJ. A liver-specific nitric oxide donor improves the intra-hepatic vascular response to both portal blood flow increase and methoxamine in cirrhotic rats. Journal Of Hepatology 2003, 39: 940-946. PMID: 14642609, DOI: 10.1016/j.jhep.2003.09.018.Peer-Reviewed Original ResearchConceptsBlood flow increasesCirrhotic ratsPortal pressureUrsodeoxycholic acidLiver perfusionFlow/pressure curvesNO donorAscitic cirrhotic ratsBlood volume expansionBasal heart rateSitu liver perfusionNitric oxide productionNitric oxide donorDose/response curveBlood flow measurementsPortal hypertensionHemodynamic effectsArterial pressureFlow increasesVascular responsesControl ratsBlood infusionBACKGROUND/Heart rateOxide donorMesenteric vasoconstriction triggers nitric oxide overproduction in the superior mesenteric artery of portal hypertensive rats
Tsai MH, Iwakiri Y, Cadelina G, Sessa WC, Groszmann RJ. Mesenteric vasoconstriction triggers nitric oxide overproduction in the superior mesenteric artery of portal hypertensive rats. Gastroenterology 2003, 125: 1452-1461. PMID: 14598261, DOI: 10.1016/j.gastro.2003.07.014.Peer-Reviewed Original ResearchConceptsPartial portal vein ligationSuperior mesenteric arterySMA vascular resistancePortal hypertensive ratsRAL ratsMesenteric vasoconstrictionPortal pressureVascular resistanceArterial pressureHypertensive ratsMesenteric arteryNitric oxide synthase activityNitric oxide synthase enzyme activitySMA blood flowMean arterial pressurePerfusion pressure changesPortal vein ligationENOS protein expressionSham-operated ratsOxide synthase activityMonomethyl-L-arginineNitric oxide overproductionEffects of vasoconstrictionRenal artery ligationENOS catalytic activity