0000000000461694

AUTHOR

Alessandra Santangelo

showing 2 related works from this author

Mesenchymal Transition of High-Grade Breast Carcinomas Depends on Extracellular Matrix Control of Myeloid Suppressor Cell Activity

2016

SummaryThe extracellular matrix (ECM) contributes to the biological and clinical heterogeneity of breast cancer, and different prognostic groups can be identified according to specific ECM signatures. In high-grade, but not low-grade, tumors, an ECM signature characterized by high SPARC expression (ECM3) identifies tumors with increased epithelial-to-mesenchymal transition (EMT), reduced treatment response, and poor prognosis. To better understand how this ECM3 signature is contributing to tumorigenesis, we expressed SPARC in isogenic cell lines and found that SPARC overexpression in tumor cells reduces their growth rate and induces EMT. SPARC expression also results in the formation of a h…

0301 basic medicineMyeloidMDSCGene Expressionmedicine.disease_causeT-Lymphocytes RegulatoryPolyethylene GlycolsExtracellular matrixMiceBreast cancerMyeloid CellsOsteonectinMast Cellslcsh:QH301-705.5Mice KnockoutAntigen PresentationMice Inbred BALB CEMTepithelial to mesenchymal transitionBreast cancer; COX-2; CXCL12; ECM; EMT; G-CSF; GM-CSF; MDSC; SPARC; aminobisphosphonates; cyclooxygenase-2; epithelial to mesenchymal transition; extracellular matrix; granulocyte colony-stimulating factor; granulocyte-macrophage colony-stimulating factor; myeloid-derived suppressor cellsCXCL12Granulocyte macrophage colony-stimulating factormedicine.anatomical_structurecyclooxygenase-2granulocyte-macrophage colony-stimulating factorFemalegranulocyte colony-stimulating factormedicine.drugEpithelial-Mesenchymal Transitionextracellular matrixAntineoplastic AgentsBreast NeoplasmsBiologySettore MED/08 - Anatomia PatologicaG-CSFGeneral Biochemistry Genetics and Molecular Biology03 medical and health sciencesCell Line TumormedicineAnimalsHumansEpithelial–mesenchymal transitionECMMesenchymal stem cellSPARCGM-CSFCOX-2myeloid-derived suppressor cellsXenograft Model Antitumor AssaysIsogenic human disease modelsaminobisphosphonates030104 developmental biologylcsh:Biology (General)CelecoxibDoxorubicinImmunologyCancer researchMyeloid-derived Suppressor CellaminobisphosphonateNeoplasm GradingCarcinogenesisCell Reports
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SPARC oppositely regulates inflammation and fibrosis in bleomycin-induced lung damage.

2011

Fibrosis results from inflammatory tissue damage and impaired regeneration. In the context of bleomycin-induced pulmonary fibrosis, we demonstrated that the matricellular protein termed secreted protein acidic and rich in cysteine (SPARC) distinctly regulates inflammation and collagen deposition, depending on its cellular origin. Reciprocal Sparc(-/-) and wild-type (WT) bone marrow chimeras revealed that SPARC expression in host fibroblasts is required and sufficient to induce collagen fibrosis in a proper inflammatory environment. Accordingly, Sparc(-/-) >WT chimeras showed exacerbated inflammation and fibrosis due to the inability of Sparc(-/-) macrophages to down-regulate tumor necrosis …

Pathologymedicine.medical_specialtyAnimals; Bleomycin; Bone Marrow Cells; Chimera; Collagen; Down-Regulation; Fibroblasts; Leukocytes; Macrophages; Mice; Mice Inbred BALB C; Osteonectin; Pneumonia; Pulmonary Fibrosis; Transforming Growth Factor beta; Tumor Necrosis Factor-alphaPulmonary FibrosisDown-RegulationInflammationBone Marrow CellsBiologyPathology and Forensic MedicineMiceFibrosisTumor necrosis factor productionTransforming Growth Factor betaPulmonary fibrosismedicineLeukocytesAnimalsOsteonectinInbred BALB CChimeraTumor Necrosis Factor-alphaMacrophagesMatricellular proteinRegular ArticleSPARCTransforming growth factor betaPneumoniaFibroblastsBLEOMYCINmedicine.diseaseSPARC; BLEOMYCIN; LUNG DAMAGELUNG DAMAGECancer researchbiology.proteinTumor necrosis factor alphaCollagenmedicine.symptomOsteonectin
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