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<dc:title xml:lang="fr">Carte d’identité transcriptionnelle du carcinome ovarien séreux de haut grade</dc:title>
<dcterms:alternative xml:lang="en">Transcriptional map of high-grade serous ovarian carcinoma</dcterms:alternative>
<dc:subject xml:lang="fr">Carcinome séreux de haut grade (HGSOC)</dc:subject>
<dc:subject xml:lang="fr">Microenvironnement tumoral</dc:subject>
<dc:subject xml:lang="fr">Transcriptomique spatiale</dc:subject>
<dc:subject xml:lang="fr">Séquençage ARN unicellulaire</dc:subject>
<dc:subject xml:lang="fr">Hétérogénéité tumorale</dc:subject>
<dc:subject xml:lang="en">High-grade serous ovarian cancer (HGSOC)</dc:subject>
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<dc:subject xml:lang="en">Spatial transcriptomics</dc:subject>
<dc:subject xml:lang="en">ScRNA-seq</dc:subject>
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<tef:elementdEntree autoriteExterne="157478920" autoriteSource="Sudoc">Micro-environnement tumoral</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">En intégrant la transcriptomique unicellulaire, la transcriptomique spatiale et le séquençag de l’exome, nous avons caractérisé l’organisation cellulaire et spatiale du HGSOC dans une cohorte de 34 patientes naïves de traitement. Les cellules épithéliales présentent une forte hétérogénéité, marquée par des programmes prolifératifs, mésenchymateux ou inflammatoires selon le site tumoral. Les fibroblastes se répartissent en sous-populations aux fonctions distinctes, incluant des états de remodelage matriciel et d’angiogenèse, tandis que les cellules endothéliales montrent des profils variés liés à l’inflammation, au stress ou à la stabilisation vasculaire. Les macrophages affichent des programmes profondément influencés par leur environnement (tumeur, métastase, ascite). Les analyses génétiques confirment les altérations majeures du HGSOC et révèlent des mutations rares potentiellement impliquées dans des programmes cellulaires spécifiques. Cette approche intégrée met en lumière la forte structuration spatiale du microenvironnement tumoral.</dcterms:abstract>
<dcterms:abstract xml:lang="en">By integrating single-cell transcriptomics, spatial transcriptomics, and whole-exome sequencing, we characterized the cellular and spatial organization of HGSOC in a cohort of 34 treatment-naive patients. Epithelial cells exhibited marked heterogeneity, with proliferative, mesenchymal, or inflammatory programs depending on the tumor site. Fibroblasts segregated into functional subpopulations, including matrix-remodeling and angiogenesis-associated states, while endothelial cells displayed diverse profiles linked to inflammation, stress responses, or vascular stabilization. Macrophages showed transcriptional programs strongly shaped by their local environment (tumor, metastasis, ascites). Genetic analyses confirmed the major alterations characteristic of HGSOC and uncovered rare mutations potentially linked to specific cellular programs. Together, this integrated approach highlights the highly structured spatial organization of the tumor microenvironment.</dcterms:abstract>
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