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Comparación del desempeño de métodos de deconvolución para la identificación de la composición celular y su asociación con la supervivencia en muestras de cáncer de ovario seroso de alto grado a partir de datos de RNA-seq

dc.contributor.advisorGutierrez Castañeda, Luz Dary
dc.contributor.advisorPayán Gómez, César
dc.contributor.authorCarvajal Veloza, Jonathan
dc.contributor.researchgroupGrupo de Investigación en Bioinformática y Biología de Sistemas
dc.date.accessioned2026-02-13T00:05:57Z
dc.date.available2026-02-13T00:05:57Z
dc.date.issued2025-09-15
dc.descriptionilustraciones a color, diagramas, tablasspa
dc.description.abstractEl conocimiento del microambiente tumoral ha mostrado un papel importante en pronóstico y respuesta a tratamientos del cáncer. El cáncer de ovario seroso de alto grado (HGSOC) se caracteriza por su heterogeneidad, quimioresistencia y mal pronóstico. La caracterización de su composición celular mediante métodos experimentales es compleja y costosa. Mediante análisis de deconvolución es posible estimar el contenido celular a partir de datos genómicos de tejido completo. El objetivo de este trabajo fue comparar el desempeño de métodos de deconvolución para la identificación de la composición celular y su asociación con la supervivencia en muestras de HGSOC a partir de datos de RNAseq. Se construyeron pseudobulks a partir de scRNA-seq de HGSOC y se evaluaron con los métodos de deconvolución CIBERSORTx, TOAST, Linseed y CDSeqR. Posteriormente, se analizaron datos bulk de TCGA-OV (n = 150) considerando únicamente tumores serosos primarios, estadios FIGO IIIC/IV, pacientes blancos, mayores de 20 años y con supervivencia > 365 días. En la comparación de pseudobulk, CIBERSORTx obtuvo la mayor precisión (r=0.91, MAE=0.039, RMSE=0.061), seguido de TOAST (r=0.63, MAE=0.065, RMSE=0.091). En el análisis de supervivencia, TOAST identificó que a mayor proporción de células plasmáticas mayor supervivencia global, mientras que a una mayor proporción de células T y NK menor sobrevida. Con CIBERSORTx se encontró que a mayor proporción de células plasmáticas mayor sobrevida. En conclusión, CIBERSORTx fue el método más robusto y preciso, mientras que TOAST ofreció mayor sensibilidad para la asociación con supervivencia. Los métodos reference-free resultaron poco confiables en tumores heterogéneos. (Texto tomado de la fuente)spa
dc.description.abstractKnowledge of the tumor microenvironment has shown an important role in cancer prognosis and treatment response. High-grade serous ovarian cancer (HGSOC) is characterized by heterogeneity, chemoresistance, and poor prognosis. The characterization of its cellular composition through experimental methods is complex and costly. From a bioinformatics perspective, it is possible to use existing bulk genomic data available in public repositories. The objective of this study was to compare the performance of deconvolution methods for identifying cellular composition and their association with survival in HGSOC samples using RNA-seq data. Pseudobulks were constructed from HGSOC scRNA-seq and evaluated with the deconvolution methods CIBERSORTx, TOAST, Linseed, and CDSeqR. Subsequently, bulk RNA-seq data from TCGA-OV (n = 150) were analyzed, considering only primary serous tumors, FIGO stage IIIC/IV, white patients, age > 20 years, and overall survival > 365 days. In pseudobulk comparisons, CIBERSORTx achieved the highest accuracy (r = 0.91, MAE = 0.039, RMSE = 0.061), followed by TOAST (r = 0.63, MAE =0.065, RMSE = 0.091). In the survival analysis, TOAST identified that a higher proportion of plasma cells was associated with better overall survival, whereas higher proportions of T and NK cells were associated with worse outcomes. With CIBERSORTx, a higher proportion of plasma cells was also associated with improved survival. In conclusion, CIBERSORTx was the most robust and accurate method, whereas TOAST showed greater sensitivity in detecting survival associations. Reference-free methods proved unreliable in heterogeneous tumors.eng
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Bioinformática
dc.description.researchareaBioinformática funcional y estructural
dc.format.extentxii, 62 páginas
dc.format.mimetypeapplication/pdf
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombiaspa
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/89538
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotá
dc.publisher.facultyFacultad de Ingeniería
dc.publisher.placeBogotá, Colombia
dc.publisher.programBogotá - Ingeniería - Maestría en Bioinformática
dc.relation.indexedBireme
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.licenseReconocimiento 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject.ddc610 - Medicina y salud::616 - Enfermedades
dc.subject.decsAnálisis de Supervivenciaspa
dc.subject.decsSurvival Analysiseng
dc.subject.decsNeoplasias Ováricasspa
dc.subject.decsOvarian Neoplasmseng
dc.subject.decsRNA-Seqspa
dc.subject.decsInmunohistoquímicaspa
dc.subject.decsImmunohistochemistryeng
dc.subject.proposalDeconvoluciónspa
dc.subject.proposalHGSOCspa
dc.subject.proposalMicroambiente tumoralspa
dc.subject.proposalTCGAspa
dc.subject.proposalSupervivenciaspa
dc.subject.proposalCIBERSORTxspa
dc.subject.proposalTOASTspa
dc.subject.proposalMicroambiente tumoralspa
dc.subject.proposalSupervivenciaspa
dc.subject.proposalDeconvolutioneng
dc.subject.proposalTumor microenvironmenteng
dc.subject.proposalSurvivaleng
dc.titleComparación del desempeño de métodos de deconvolución para la identificación de la composición celular y su asociación con la supervivencia en muestras de cáncer de ovario seroso de alto grado a partir de datos de RNA-seqspa
dc.title.translatedComparison of deconvolution methods for identifying cellular composition and its association with survival in high-grade serous ovarian cancer using RNA-seq dataeng
dc.typeTrabajo de grado - Maestría
dc.type.coarhttp://purl.org/coar/resource_type/c_bdcc
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.contentText
dc.type.driverinfo:eu-repo/semantics/masterThesis
dc.type.redcolhttp://purl.org/redcol/resource_type/TM
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dcterms.audience.professionaldevelopmentInvestigadores
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2

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