2023
Improvement in cardiac function and regional LV strain following intramyocardial injection of a theranostic hydrogel early postmyocardial infarction in a porcine model
Avendaño R, Midgett D, Melvinsdottir I, Thorn S, Uman S, Pickell Z, Lee S, Liu Z, Mamarian M, Duncan J, Spinale F, Burdick J, Sinusas A. Improvement in cardiac function and regional LV strain following intramyocardial injection of a theranostic hydrogel early postmyocardial infarction in a porcine model. Journal Of Applied Physiology 2023, 135: 405-420. PMID: 37318987, PMCID: PMC10538987, DOI: 10.1152/japplphysiol.00342.2022.Peer-Reviewed Original ResearchConceptsMyocardial infarctionIntramyocardial deliveryLV hemodynamicsControl groupFunctional indexEarly post-myocardial infarctionSystolic functional indicesMyocardial performance indexAnterolateral myocardial infarctionLeft anterior descendingPressure-volume loop areaLeft ventricular remodelingGlobal LV functionLV functional changesPost-myocardial infarctionSupply/demand ratioRegional LV strainHydrogel groupTei indexEjection fractionHeart failureAnterior descendingCircumflex arteryLV functionAortic pressure
2022
Regional heterogeneity in determinants of atrial matrix remodeling and association with atrial fibrillation vulnerability postmyocardial infarction
Stacy MR, Lin BA, Thorn SL, Lobb DC, Maxfield MW, Novack C, Zellars KN, Freeburg L, Akar JG, Sinusas AJ, Spinale FG. Regional heterogeneity in determinants of atrial matrix remodeling and association with atrial fibrillation vulnerability postmyocardial infarction. Heart Rhythm 2022, 19: 847-855. PMID: 35066183, PMCID: PMC9064890, DOI: 10.1016/j.hrthm.2022.01.022.Peer-Reviewed Original ResearchConceptsAtrial fibrillationMyocardial infarctionRight atrial regionsAtrial regionsPost-MIMMP activityMatrix metalloproteinasesMMP/TIMP profilesNew-onset atrial fibrillationLeft atrial regionsMMP/TIMP expressionLeft atrial appendageMatrix remodelingElectrical stimulation protocolFibrillar collagen contentExtracellular matrix remodelingAF vulnerabilityTIMP profilesAtrial appendagePostmyocardial infarctionMyocardial substrateStimulation protocolNoninvasive molecular imagingTIMP expressionTissue inhibitor
2020
Imaging of Injectable Hydrogels Delivered into Myocardium with SPECT/CT
Uman S, Wang LL, Thorn SL, Liu Z, Duncan JS, Sinusas AJ, Burdick JA. Imaging of Injectable Hydrogels Delivered into Myocardium with SPECT/CT. Advanced Healthcare Materials 2020, 9: e2000294. PMID: 32543053, PMCID: PMC7482444, DOI: 10.1002/adhm.202000294.Peer-Reviewed Original ResearchConceptsInjectable hydrogelsMyocardial infarctionSelf-healing hydrogelsHydrogel mechanical propertiesHybrid single-photon emissionHybrid SPECT/CT imagingMechanical propertiesTomography perfusion imagingAcute porcine modelSPECT/CT imagingSPECT/CTSingle photon emissionInjection forceHyaluronic acid hydrogelsPattern of deliveryTomography/HydrogelsPerfusion defectsPerfusion imagingExcellent radiopacityPorcine modelAcid hydrogelsCT imagingHydrogel deliveryHydrogel injection
2019
Angiotensin Receptor Neprilysin Inhibitor Attenuates Myocardial Remodeling and Improves Infarct Perfusion in Experimental Heart Failure
Pfau D, Thorn SL, Zhang J, Mikush N, Renaud JM, Klein R, deKemp RA, Wu X, Hu X, Sinusas AJ, Young LH, Tirziu D. Angiotensin Receptor Neprilysin Inhibitor Attenuates Myocardial Remodeling and Improves Infarct Perfusion in Experimental Heart Failure. Scientific Reports 2019, 9: 5791. PMID: 30962467, PMCID: PMC6453892, DOI: 10.1038/s41598-019-42113-0.Peer-Reviewed Original ResearchMeSH KeywordsAminobutyratesAngiotensin Receptor AntagonistsAnimalsBiphenyl CompoundsDrug CombinationsHeartHeart FailureMaleMyocardial Reperfusion InjuryMyocardiumNeovascularization, PhysiologicNeprilysinOrganotechnetium CompoundsPeptides, CyclicRatsRats, Inbred LewSingle Photon Emission Computed Tomography Computed TomographyTetrazolesValsartanVascular Endothelial Growth Factor AVentricular RemodelingConceptsSacubitril/valsartanExperimental heart failureHeart failureMyocardial infarctionMyocardial remodelingAngiotensin receptor neprilysin inhibitorAngiotensin receptor blocker valsartanMicroSPECT/CT imagingReceptor blocker valsartanHeart failure patientsProgressive LV dilationGlobal LV functionLV contractile dysfunctionNeprilysin inhibitor sacubitrilBorder zoneLimited remodelingFailure patientsInhibitor therapyMale LewisWeeks treatmentLV dilationLV functionNeprilysin inhibitorContractile dysfunctionInterstitial fibrosis
2015
PET imaging of a collagen matrix reveals its effective injection and targeted retention in a mouse model of myocardial infarction
Ahmadi A, Thorn SL, Alarcon EI, Kordos M, Padavan DT, Hadizad T, Cron GO, Beanlands RS, DaSilva JN, Ruel M, deKemp RA, Suuronen EJ. PET imaging of a collagen matrix reveals its effective injection and targeted retention in a mouse model of myocardial infarction. Biomaterials 2015, 49: 18-26. PMID: 25725551, DOI: 10.1016/j.biomaterials.2015.01.016.Peer-Reviewed Original ResearchConceptsMyocardial infarctionPositron emission tomographyPET imagingMouse modelNon-invasive PET imagingCardiac regeneration therapyIschemic territoryPET resultsInfarcted myocardiumEmission tomographyCollagen matrixMyocardial injectionEarly retentionPromising modalityRegeneration therapyInfarctionLabeling efficiencyMyocardiumFluorescence imagingImagingBiodistributionInjectionQdot labelingEx