0000000000237674

AUTHOR

Augusto Orlandi

showing 6 related works from this author

Biomechanical properties and histomorphometric features of aortic tissue in patients with or without bicuspid aortic valve

2020

Background We sought to investigate and compare biomechanical properties and histomorphometric findings of thoracic ascending aorta aneurysm (TAA) tissue from patients with bicuspid aortic valve (BAV) and tricuspid aortic valve (TAV) in order to clarify mechanisms underlying differences in the clinical course. Methods Circumferential sections of TAA tissue in patients with BAV (BAV-TAA) and TAV (TAV-TAA) were obtained during surgery and used for biomechanical tests and histomorphometrical analysis. Results In BAV-TAA, we observed biomechanical higher peak stress and lower Young modulus values compared with TAV-TAA wall. The right lateral longitudinal region seemed to be the most fragile zon…

Pulmonary and Respiratory MedicineAortic valveTunica mediamedicine.medical_specialtyaortopathyDissection (medical)030204 cardiovascular system & hematologycomplex mixtures030218 nuclear medicine & medical imaging03 medical and health sciences0302 clinical medicineBicuspid aortic valvefluid dynamic analysisInternal medicineparasitic diseasesmedicineIn patientAortic dissectionbiologybusiness.industryaortic wallelastic tissue fragmentationmedicine.diseasedigestive system diseasesAortic wallSettore MED/23medicine.anatomical_structureBicuspid aortic valve (BAV)biology.proteinCardiologycardiovascular systemOriginal ArticlebusinessElastin
researchProduct

The Endothelial Transcription Factor ERG Mediates a Differential Role in the Aneurysmatic Ascending Aorta with Bicuspid or Tricuspid Aorta Valve: A P…

2022

The pathobiology of ascending aorta aneurysms (AAA) onset and progression is not well understood and only partially characterized. AAA are also complicated in case of bicuspid aorta valve (BAV) anatomy. There is emerging evidence about the crucial role of endothelium-related pathways, which show in AAA an altered expression and function. Here, we examined the involvement of ERG-related pathways in the differential progression of disease in aortic tissues from patients having a BAV or tricuspid aorta valve (TAV) with or without AAA. Our findings identified ERG as a novel endothelial-specific regulator of TGF-β-SMAD, Notch, and NO pathways, by modulating a differential fibrotic or calcified A…

NotchHeart Valve DiseasesCatalysisInorganic ChemistryBicuspid Aortic Valve DiseaseTranscriptional Regulator ERGascending aorta aneurysm; bicuspid aorta valve; tricuspid aorta valve; ERG transcriptional factor pathway; TGF-β-SMAD; Notch; NO pathways modulationTransforming Growth Factor betaSettore MED/05 - Patologia ClinicaHumansTGF-β-SMADEndotheliumPhysical and Theoretical ChemistryMolecular BiologySpectroscopyAortabicuspid aorta valveOrganic ChemistryERG transcriptional factor pathwayGeneral Medicineascending aorta aneurysmComputer Science ApplicationsSettore MED/23Aortic Valvetricuspid aorta valveNO pathways modulationBiomarkersTranscription FactorsInternational Journal of Molecular Sciences; Volume 23; Issue 18; Pages: 10848
researchProduct

PD-L1 in small bowel adenocarcinoma is associated with etiology and tumor-infiltrating lymphocytes, in addition to microsatellite instability

2020

Small bowel adenocarcinomas (SBAs) are often associated with poor prognosis and have limited therapeutic options. Programmed cell death protein-1 (PD-1)/programmed cell death ligand 1 (PD-L1) pathway blockade is an effective treatment in many microsatellite instability-high (MSI-H) solid tumors. We aimed at investigating PD-L1 and PD-1 expression in non-hereditary, non-ampullary SBAs, associated with celiac disease (CeD), Crohn’s disease (CrD), or sporadic, recruited through the Small Bowel Cancer Italian Consortium. We assessed PD-L1 and PD-1 by immunohistochemistry in a series of 121 surgically resected SBAs, including 34 CeD-SBAs, 49 CrD-SBAs, and 38 sporadic SBAs. PD-L1 and PD-1 express…

0301 basic medicineMalePD-L1 - small bowel adenocarcinoma - tumor-infiltrating lymphocytes - microsatellite instabilityPathologyBLOCKADEColorectal cancerLymphocyteSmall bowel adenocarcinomaGastroenterologyB7-H1 AntigenSettore MED/120302 clinical medicineCrohn DiseaseIntestine Smallsmall bowel adenocarcinomaSmall bowel adenocarcinomasMEDULLARY CARCINOMA; MORPHOLOGY; EXPRESSION; BLOCKADE; CANCERbiologymicrosatelliteinstabilityMiddle AgedCANCERmedicine.anatomical_structureMedullary carcinomatumor infiltrating lymphocytes030220 oncology & carcinogenesistumor-infiltrating lymphocytesAdenocarcinomaFemaleMicrosatellite InstabilityPD-L1Adultmedicine.medical_specialtysmall bowel adenocarcinoma tumor-infiltrating lymphocytes microsatelliteinstabilitySettore MED/08 - Anatomia PatologicaAdenocarcinomaMEDULLARY CARCINOMAPD-L1 small bowel adenocarcinomaNOPathology and Forensic Medicine03 medical and health sciencesLymphocytes Tumor-InfiltratingInternal medicinePD-L1expressionIntestinal NeoplasmsBiomarkers TumormedicineHumansPD-L1; small bowel adenocarcinoma; tumor infiltrating lymphocytesPD-L1 in small bowel adenocarcinoma MSI-HSmall bowel adenocarcinoma expression microsatellite instability biomarkersAgedRetrospective Studiesbusiness.industryTumor-infiltrating lymphocytesbiomarkersCancerCorrectionMicrosatellite instabilitymedicine.diseaseCeliac Disease030104 developmental biologybiology.proteinEtiologyMORPHOLOGYbusiness
researchProduct

Early structural degeneration of Mitroflow aortic valve: Another issue in addition to the mismatch?

2018

We reported two cases of early structural valve degeneration (SVD) with Mitroflow prosthesis in aortic position in patients above the age of 65 years. Microscopic aspects have been analysed to investigate the intrinsic mechanism of SVD. New techniques to improve the structure and the preservation of this prosthesis are needed in order to reduce potential dangerous early complications.

Aortic valvePulmonary and Respiratory Medicinemedicine.medical_specialtyAortic stenosimedicine.medical_treatmentCase ReportDegeneration (medical)030204 cardiovascular system & hematologyProsthesisStructural valve degeneration (SVD); aortic stenosis; prosthesis03 medical and health sciences0302 clinical medicineInternal medicinemedicineStructural valve degeneration (SVD)ProsthesiSettore MED/05 - Patologia ClinicaIn patient030212 general & internal medicineAortic stenosis; Prosthesis; Structural valve degeneration (SVD); Pulmonary and Respiratory Medicinebusiness.industryaortic stenosisSettore MED/23 - Chirurgia Cardiacamedicine.anatomical_structureCardiologyprosthesisbusiness
researchProduct

Prognostic Role of Mismatch Repair Status, Histotype and High-Risk Pathologic Features in Stage II Small Bowel Adenocarcinomas

2020

Abstract Background Small bowel adenocarcinoma is a relatively rare cancer, often diagnosed in an advanced stage. In localized and resectable disease, surgery alone or in combination with adjuvant chemotherapy is the mainstay of treatment. In the recently published National Comprehensive Cancer Network Clinical Practice guidelines, criteria for selecting patients with stage II small bowel adenocarcinoma to receive adjuvant chemotherapy are provided, and they are mainly extrapolated from studies on colorectal cancer. Patients and Methods In the present study, we aimed to verify whether mismatch repair deficiency phenotype, high-risk pathologic features (including T4, positive resection margi…

MaleOncologyColorectal cancerDNA Mismatch RepairCOLORECTAL-CANCERSettore MED/120302 clinical medicinePMS2small bowel adenocarcinomaMismatch Repair Endonuclease PMS20303 health sciencesPrognosisMMRMutS Homolog 2 ProteinOncologyCARCINOMAS030220 oncology & carcinogenesisimmunohistochemistryMismatch Repair Status small bowel adenocarcinomaFemaleMicrosatellite InstabilityDNA mismatch repairMutL Protein Homolog 1Colorectal Neoplasmsstage IImedicine.medical_specialtyhigh-risk pathologic featuresDNA Mismatch Repair; Female; Humans; Male; Microsatellite Instability; Mismatch Repair Endonuclease PMS2; MutL Protein Homolog 1; MutS Homolog 2 Protein; Prognosis; Adenocarcinoma; Colorectal Neoplasmssmall bowel adenocarcinoma; mismatch repair statusAdenocarcinomaNO03 medical and health sciencessmall bowel carcinomahistotypeInternal medicineTranslational ResearchmedicineHumansmismatch repair status030304 developmental biologysmall bowel adenocarcinomasbusiness.industryCancerMicrosatellite instabilityMismatch Repair ProteinAdenocarcinoma IBD Cancermedicine.diseasedigestive system diseasesMSH6COLORECTAL-CANCER; CARCINOMAS; CONSENSUSsmall bowel carcinoma MMR immunohistochemistryMismatch repair Small bowel AdenocarcinomaMSH2Mismatch repair status; stage II; small bowel adenocarcinomas; histotype; high-risk pathologic featuresSurgeryCONSENSUSbusiness
researchProduct

Small Bowel Carcinomas in Coeliac or Crohn’s Disease: Clinico-pathological, Molecular, and Prognostic Features. A Study From the Small Bowel Cancer I…

2017

Background and aims An increased risk of small bowel carcinoma [SBC] has been reported in coeliac disease [CD] and Crohn's disease [CrD]. We explored clinico-pathological, molecular, and prognostic features of CD-associated SBC [CD-SBC] and CrD-associated SBC [CrD-SBC] in comparison with sporadic SBC [spo-SBC]. Methods A total of 76 patients undergoing surgical resection for non-familial SBC [26 CD-SBC, 25 CrD-SBC, 25 spo-SBC] were retrospectively enrolled to investigate patients' survival and histological and molecular features including microsatellite instability [MSI] and KRAS/NRAS, BRAF, PIK3CA, TP53, HER2 gene alterations. Results CD-SBC showed a significantly better sex-, age-, and st…

Male0301 basic medicineNeuroblastoma RAS viral oncogene homologOncologySurvivalReceptor ErbB-2Colorectal cancermedicine.disease_causeInflammatory bowel diseaseInflammatory bowel diseasetumour-infiltrating lymphocyteErbB-20302 clinical medicineCrohn DiseaseRetrospective StudieRisk Factors80 and overChildClass I Phosphatidylinositol 3-KinaseAged 80 and overColonic NeoplasmSettore MED/12 - GastroenterologiaCrohn's diseaseMLH1 methylationTumour-infiltrating lymphocytesGastroenterologyGeneral MedicineMiddle AgedPrognosisInflammatory bowel disease; Microsatellite instability; MLH1 promoter methylation; Survival; Tumour-infiltrating lymphocytes; Gastroenterology030220 oncology & carcinogenesisColonic NeoplasmsSurvival AnalysiKRASHumanReceptorAdultProto-Oncogene Proteins B-rafmedicine.medical_specialtyPrognosiClass I Phosphatidylinositol 3-KinasesSettore MED/08 - Anatomia PatologicaNOProto-Oncogene Proteins p21(ras)MLH1 promoter methylationYoung Adult03 medical and health sciencesInternal medicinemedicineCarcinomaHumansMLH1 methylation; inflammatory bowel disease; microsatellite instability; survival; tumour-infiltrating lymphocytesneoplasmsAgedRetrospective StudiesInflammatory bowel disease; Microsatellite instability; MLH1 promoter methylation; Survival; Tumour-infiltrating lymphocytes; Adult; Aged; Aged 80 and over; Celiac Disease; Child; Class I Phosphatidylinositol 3-Kinases; Colonic Neoplasms; Crohn Disease; Humans; Male; Microsatellite Instability; Middle Aged; Prognosis; Proto-Oncogene Proteins B-raf; Proto-Oncogene Proteins p21(ras); Receptor ErbB-2; Retrospective Studies; Risk Factors; Survival Analysis; Tumor Suppressor Protein p53; Young Adult; Gastroenterologybusiness.industryTumour-infiltrating lymphocyteRisk FactorCancerMicrosatellite instabilityinflammatory bowel disease; microsatellite instability; MLH1 promoter methylation; tumour-infiltrating lymphocytes; survivalmedicine.diseaseSurvival Analysiseye diseasesdigestive system diseasesCeliac Disease030104 developmental biologyMicrosatellite instabilityTumor Suppressor Protein p53businessJournal of Crohn's and Colitis
researchProduct