Search results for "thoracic aortic aneurysm"

showing 10 items of 47 documents

Local Application of Leptin Antagonist Attenuates Angiotensin II–Induced Ascending Aortic Aneurysm and Cardiac Remodeling

2016

Background Ascending thoracic aortic aneurysm ( ATAA ) is driven by angiotensin II (Ang II ) and contributes to the development of left ventricular ( LV ) remodeling through aortoventricular coupling. We previously showed that locally available leptin augments Ang II ‐induced abdominal aortic aneurysms in apolipoprotein E–deficient mice. We hypothesized that locally synthesized leptin mediates Ang II ‐induced ATAA . Methods and Results Following demonstration of leptin synthesis in samples of human ATAA associated with different etiologies, we modeled in situ leptin expression in apolipoprotein E–deficient mice by applying exogenous leptin on the surface of the ascending aorta. This treatm…

LeptinMale0301 basic medicineAortic valveTranslational StudiesMice Knockout ApoEaortic valve stenosisangiotensin II030204 cardiovascular system & hematologyLeft ventricular hypertrophyVascular MedicineMiceAortic aneurysm0302 clinical medicineVasoconstrictor AgentsMedicineCells CulturedOriginal ResearchAged 80 and overVentricular RemodelingLeptindigestive oral and skin physiologyMiddle Agedleft ventricular hypertrophymedicine.anatomical_structureAortic ValveAortic valve stenosiscardiovascular systemCardiologyFemaleHypertrophy Left VentricularCardiology and Cardiovascular Medicineaortic aneurysmhormones hormone substitutes and hormone antagonistsAdultmedicine.medical_specialtyvascular remodelingThoracic aortic aneurysmYoung Adult03 medical and health sciencesVascular Stiffnessmedicine.arteryInternal medicineAscending aortaAnimalsHumansAgedCell ProliferationAortic Aneurysm Thoracicbusiness.industryleptin antagonistmedicine.diseaseAneurysmAngiotensin II030104 developmental biologyEndocrinologyAnimal Models of Human DiseaseValvular Heart DiseasebusinessJournal of the American Heart Association
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A Typical Immune T/B Subset Profile Characterizes Bicuspid Aortic Valve: In an Old Status?

2018

Bicuspid valve disease is associated with the development of thoracic aortic aneurysm. The molecular mechanisms underlying this association still need to be clarified. Here, we evaluated the circulating levels of T and B lymphocyte subsets associated with the development of vascular diseases in patients with bicuspid aortic valve or tricuspid aortic valve with and without thoracic aortic aneurysm. We unveiled that the circulating levels of the MAIT, CD4+IL−17A+, and NKT T cell subsets were significantly reduced in bicuspid valve disease cases, when compared to tricuspid aortic valve cases in either the presence or the absence of thoracic aortic aneurysm. Among patients with tricuspid aortic…

Male0301 basic medicineAortic valveAgingT-LymphocytesLymphocyteHeart Valve Diseases030204 cardiovascular system & hematologyBiochemistryImmunoglobulin D0302 clinical medicineBicuspid aortic valveBicuspid Aortic Valve DiseaseBicuspid aortic valve aneurysm B cellsb-cellsnotch1Invariant t-cells; aneurysm formation; angiotensin-ii; signaling pathway; genetic-variants; apoptotic cells; b-cells; mechanisms; mutations; notch1B-Lymphocytesmechanismsbiologylcsh:Cytologyhemic and immune systemsGeneral MedicineMiddle Agedmedicine.anatomical_structureAortic ValveCardiologycardiovascular systemFemaleResearch Articlesignaling pathwaymedicine.medical_specialtycongenital hereditary and neonatal diseases and abnormalitiesaneurysm formationInvariant t-cellsArticle SubjectBicuspid aortic valveT cellNaive B cellchemical and pharmacologic phenomenaThoracic aortic aneurysm03 medical and health sciencesBicuspid valveInternal medicinemedicineHumansSettore MED/05 - Patologia Clinicacardiovascular diseaseslcsh:QH573-671angiotensin-iigenetic-variantsB cellsbusiness.industrySettore MED/23 - Chirurgia Cardiacaapoptotic cellsCell Biologymutationsmedicine.disease030104 developmental biologybiology.proteinaneurysmbusinessA Typical Immune T/B Subset Profile Bicuspid Aortic Valve
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Is the Mean Blood Leukocyte Telomere Length a Predictor for Sporadic Thoracic Aortic Aneurysm? Data from a Preliminary Study

2012

Telomeres have been postulated as a universal clock that shortens in parallel with cellular aging. They are specialized DNA-protein structures at the ends of chromosome with remarkable functions--preventing their recognition as double-stranded DNA breaks, protecting their recombination and degradation, and avoiding a DNA damage cellular response. Telomere shortening is currently considered the best aging marker, but is also a predictor for age-related diseases, including cardiovascular diseases. Biological age clearly seems to be a better predictor of vascular risk rather than chronological age. This concept is supported by key assumptions that peripheral blood leukocyte telomere content ac…

MaleAgingPathologymedicine.medical_specialtyThoracicBiological ageVascular riskBiologyBioinformaticsThoracic aortic aneurysmGeneticLeukocytesmedicineHumansSettore MED/05 - Patologia ClinicaAged; Aging; Aortic Aneurysm Thoracic; Case-Control Studies; Cellular Senescence; DNA; DNA Damage; Female; Humans; Leukocytes; Male; Middle Aged; Recombination Genetic; Telomere; Vascular DiseasesVascular DiseasesCellular Senescencevascular ageingAgedRecombination GenetictelomereAortic Aneurysm ThoracicVascular diseaseChromosomeSettore MED/23 - Chirurgia CardiacaDNAMiddle Agedmedicine.diseaseRecombinationPeripheral bloodAortic AneurysmTAATelomereCellular AgingCase-Control StudiesFemaleGeriatrics and GerontologyDNA DamageRejuvenation Research
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Fiber Micro-Architecture in the Longitudinal-Radial and Circumferential-Radial Planes of Ascending Thoracic Aortic Aneurysm Media.

2013

It was recently demonstrated by our group that the delamination strength of ascending thoracic aortic aneurysms (ATAA) was lower than that of control (CTRL, non-aneurysmal) ascending thoracic aorta (ATA), and the reduced strength was more pronounced among bicuspid (BAV) vs. tricuspid aortic valve (TAV) patients, suggesting a different risk of aortic dissection for BAV patients. We hypothesized that aortic valve morphologic phenotype predicts fiber micro-architectural anomalies in ATA. To test the hypothesis, we characterized the micro-architecture in the longitudinal-radial (Z-RAD) and circumferential-radial (Θ-RAD) planes of human ATA tissue that was artificially dissected medially. The ou…

MaleAortic valve030204 cardiovascular system & hematology0302 clinical medicineThoracic aortaOrthopedics and Sports MedicineHuman ascending thoracic aortic aneurysmAortic dissection0303 health sciencesbiologyDissectionRehabilitationAnatomyMiddle AgedTunica intimaBiomechanical Phenomenamedicine.anatomical_structureAortic Valvecardiovascular systemCardiologyFemaleCollagenTunica Mediamedicine.medical_specialtyMicro-architectureMaterials scienceAortic RuptureBiomedical EngineeringBiophysicsDissection (medical)Multi-photon microscopyThoracic aortic aneurysmArticle03 medical and health sciencesInternal medicinemedicine.arterymedicineHumansAortic rupture030304 developmental biologyAnalysis of VarianceAortic Aneurysm ThoracicPhenolmedicine.diseaseElastinAortic DissectionMicroscopy Fluorescence Multiphotonbiology.proteinTunica IntimaElastin
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Can the TLR-4-mediated signaling pathway be "a key inflammatory promoter for sporadic TAA"?

2014

Thoracic aorta shows with advancing age various changes and a progressive deterioration in structure and function. As a result, vascular remodeling (VR) and medial degeneration (MD) occur as pathological entities responsible principally for the sporadic TAA onset. Little is known about their genetic, molecular, and cellular mechanisms. Recent evidence is proposing the strong role of a chronic immune/inflammatory process in their evocation and progression. Thus, we evaluated the potential role of Toll like receptor- (TLR-) 4-mediated signaling pathway and its polymorphisms in sporadic TAA. Genetic, immunohistochemical, and biochemical analyses were assessed. Interestingly, the rs4986790 TLR4…

MaleArticle SubjectGenotypeImmunologyAortic DiseasesSettore MED/41 - AnestesiologiaSingle-nucleotide polymorphismAorta ThoracicSettore MED/08 - Anatomia PatologicaBiologyPolymorphism Single NucleotideImmune systemPolymorphism (computer science)Genotypelcsh:PathologySettore MED/05 - Patologia ClinicaHumansGenetic Predisposition to DiseaseAgedToll-like receptorPolymorphism GeneticSettore MED/23 - Chirurgia CardiacaCell BiologyMiddle AgedPhenotypeImmunohistochemistryToll-Like Receptor 4medial degeneration sporadic thoracic aortic aneurysm TLR-4 mediated signaling pathway rs4986790 TLR4 polymorphism translation of genetic immunohistochemical and biochemical data clinical practiceImmunologyTLR4Matrix Metalloproteinase 2FemaleSignal transductionlcsh:RB1-214Research ArticleSignal Transduction
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In Vivo Strain Analysis of Dilated Ascending Thoracic Aorta by ECG-Gated CT Angiographic Imaging

2017

Accurate assessment of aortic extensibility is a requisite first step for elucidating the pathophysiology of an ascending thoracic aortic aneurysm (ATAA). This study aimed to develop a framework for the in vivo evaluation of the full-field distribution of the aortic wall strain by imaging analysis of electrocardiographic- (ECG) gated thoracic data of 34 patients with ATAA. Seven healthy controls (i.e., non-aneurysmal aorta) from patients who underwent ECG-gated CT angiography for coronary artery diseases were included for comparison. To evaluate the systolic function, ECG-gated computed tomography (CT) angiography was used to generate patient-specific geometric meshes of the ascending aorta…

MaleCompressive StrengthComputed Tomography AngiographyAorta Thoracic02 engineering and technology030204 cardiovascular system & hematologyECG-gated CT angiographyAortic aneurysm0302 clinical medicineBicuspid aortic valveMedicineThoracic aortaComputed tomography angiographyAged 80 and overmedicine.diagnostic_testModels CardiovascularMiddle Agedcardiovascular systemCardiologyElasticity Imaging TechniquesRadiographic Image Interpretation Computer-AssistedFemaleHumanmedicine.medical_specialtyBicuspid aortic valve0206 medical engineeringBiomedical EngineeringCardiac-Gated Imaging TechniquesReproducibility of ResultCardiac-Gated Imaging TechniqueThoracic aortic aneurysmSensitivity and SpecificityAscending thoracic aortic aneurysm strain03 medical and health sciencesRupture riskElasticity Imaging Techniquemedicine.arteryInternal medicineElastic ModulusTensile StrengthAscending aortaHumansComputer Simulationcardiovascular diseasesAgedAortaElastic ModuluAortic Aneurysm Thoracicbusiness.industryReproducibility of Resultsmedicine.disease020601 biomedical engineeringAngiographyStress Mechanicalbusiness
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Role of TGF-β Pathway Polymorphisms in Sporadic Thoracic Aortic Aneurysm: rs900 TGF-β2 Is a Marker of Differential Gender Susceptibility

2013

Thoracic aortic aneurysm (TAA) is a progressive disorder involving gradual dilation of ascending and/or descending thoracic aorta with dissection or rupture as complications. It occurs as sporadic or defined syndromes/familial forms.Genetic, molecular and cellular mechanims of sporadic TAA forms are poorly characterized and known. Thus, our interest has been focused on investigating the role of genetic variants of transforming growth factor-β(TGF-β) pathways in TAA risk. On the other hand, no data on the role of genetic variants of TGF-βpathway in sporadic TAA exist until now. In addition, other cytokines, including IL-10, orchestrate TAA pathophysiology. Their balance determines the ultima…

MalePathologyThoracicGene FrequencyProtein IsoformsThoracic aortaReceptorSingle Nucleotidesporadic TAAAdult; Aged; Aortic Aneurysm Thoracic; Female; Gene Frequency; Genotype; Humans; Interleukin-10; Male; Middle Aged; Protein Isoforms; Regression Analysis; Sex Factors; Transforming Growth Factor beta2; Genetic Predisposition to Disease; Polymorphism Single NucleotideMiddle AgedPathophysiologyAortic AneurysmInterleukin-10Interleukin 10Regression AnalysisFemaleInflammationResearch Articlelcsh:RB1-214TGF-beta SNPAdultmedicine.medical_specialtyArticle SubjectGenotypeImmunologyBiologyPolymorphism Single NucleotideThoracic aortic aneurysmcomplex mixturesTransforming Growth Factor beta2Sex Factorsmedicine.arteryparasitic diseasesmedicinelcsh:PathologyHumansSNPSettore MED/05 - Patologia ClinicaGenetic Predisposition to DiseasePolymorphismAllele frequencyAgedSettore MED/04 - Patologia GeneraleAortic Aneurysm ThoracicSettore MED/23 - Chirurgia CardiacaCell Biologymedicine.diseasedigestive system diseasesTransforming growth factorTGF-beta SNPs; sporadic TAA; InflammationMediators of Inflammation
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Identification of Three Particular Morphological Phenotypes in Sporadic Thoracic Aortic Aneurysm: Phenotype III As Sporadic Thoracic Aortic Aneurysm …

2014

Abstract Aging has a striking impact on the heart and the vascular system, particularly on the large elastic arteries (i.e., aorta), resulting in a multitude of changes at different structural and functional levels. As result, medial degeneration (MD) occurs. A characteristic example of MD is sporadic thoracic aortic aneurysm (S-TAA), whose patho-physiological mechanisms remain unclear. In this study, typical MD morphological phenotypes were researched in S-TAA cases and control aorta specimens by histopathological and immunohistochemical analyses. Three phenotypes (I, II, and III) were detected, but mainly the phenotype III was observed. Elevated cystic MD, plurifocal medial apoptosis, and…

MalePathologymedicine.medical_specialtyAgingThoracicAging; Aorta; Aortic Aneurysm Thoracic; Biomarkers; Female; Humans; Male; Middle Aged; PhenotypeDissection (medical)Settore MED/08 - Anatomia PatologicaThoracic aortic aneurysmAneurysmmedicine.arteryMedicineHumansSettore MED/05 - Patologia ClinicaAortaSettore MED/04 - Patologia GeneraleAortaSurgical approachAortic Aneurysm Thoracicbusiness.industrySettore MED/23 - Chirurgia CardiacaMiddle Agedmedicine.diseaseTAA phenotype IIIPhenotypeAortic AneurysmPhenotypeImmunohistochemistryBiomarker (medicine)FemaleGeriatrics and GerontologybusinessBiomarkers
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Familial thoracic aortic aneurysm/dissection with patent ductus arteriosus: genetic arguments for a particular pathophysiological entity.

2004

International audience; Thoracic aortic aneurysm and aortic dissection (TAA and AD) are an important cause of sudden death. Familial cases could account for 20% of all cases. A genetic heterogeneity with two identified genes (FBN1 and COL3A1) and three loci (3p24-25 or MFS2/TAAD2, 5q13-q14 and 11q23.2-24) has been shown previously. Study of a single family composed of 179 members with an abnormally high occurrence of TAA/AD disease. A total of 40 subjects from three generations were investigated. In addition to five cases of stroke and three cases of sudden death, there were four cases of AD and four cases of TAA in adults. In all, 11 cases of patent ductus arteriosus (PDA) were observed, t…

MalePathologymedicine.medical_specialtycongenital hereditary and neonatal diseases and abnormalitiesGenetic Linkage030204 cardiovascular system & hematologyThoracic aortic aneurysmSudden deathFamilial thoracic aortic aneurysm03 medical and health sciencesAortic aneurysmDeath Sudden0302 clinical medicineDuctus arteriosusGenetic modelGeneticsmedicine[INFO.INFO-IM]Computer Science [cs]/Medical ImagingHumansDuctus Arteriosus PatentGenetics (clinical)030304 developmental biologyAortic dissection0303 health sciences[ INFO.INFO-IM ] Computer Science [cs]/Medical ImagingAortic Aneurysm ThoracicGenetic heterogeneitybusiness.industryAnatomymedicine.disease3. Good healthPedigreeStrokeAortic Dissectionmedicine.anatomical_structureFemaleFrancebusinessMicrosatellite RepeatsEuropean journal of human genetics : EJHG
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Three-dimensional parametric modeling of bicuspid aortopathy and comparison with computational flow predictions

2016

Bicuspid aortic valve (BAV)-associated ascending aneurysmal aortopathy (namely “bicuspid aortopathy”) is a heterogeneous disease making surgeon predictions particularly challenging. Computational flow analysis can be used to evaluate the BAV-related hemodynamic disturbances, which likely lead to aneurysm enlargement and progression. However, the anatomic reconstruction process is time consuming so that predicting hemodynamic and structural evolution by computational modeling is unfeasible in routine clinical practice. The aim of the study was to design and develop a parametric program for three-dimensional (3D) representations of aneurysmal aorta and different BAV phenotypes starting fr…

MalePatient-Specific ModelingBicuspid aortic valveComputed Tomography AngiographyHeart Valve DiseasesBiomedical EngineeringMedicine (miscellaneous)Bioengineering—Three-dimensional anatomic reconstructionElectrocardiographyImaging Three-DimensionalBicuspid Aortic Valve DiseaseSettore ING-IND/12 - Misure Meccaniche E TermicheHumans—Finite-element analysiProspective StudiesAortaAgedRetrospective Studies—Aortic failureHemodynamicsModels CardiovascularComputational BiologySettore ING-IND/34 - Bioingegneria IndustrialeMiddle AgedBiomaterialAortic Aneurysm—Ascending thoracic aortic aneurysmAortic ValveFemaleStress MechanicalSoftware
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