Finding out tumor microenvironment characteristics associated with the progression of ovarian cancer

dc.contributor.advisorRomero Castro, Edgar Eduardospa
dc.contributor.authorMontoya Rodriguez, Eileen Tatianaspa
dc.contributor.researcherSalguero Lopez, Jenniferspa
dc.contributor.researchgroupCim@Labspa
dc.date.accessioned2024-09-18T15:31:29Z
dc.date.available2024-09-18T15:31:29Z
dc.date.issued2024
dc.descriptionilustraciones, diagramasspa
dc.description.abstractThe tumor microenvironment (TME) encompasses the dynamic interactions between a tumor and surrounding tissues, playing a crucial role in cancer progression. Histological images provide valuable information about the characteristics of the TME. Computational pathology techniques have made significant advances in automating the identification and classification of these interactions; however, certain limitations still persist. The complexity and heterogeneity of the microenvironment make it difficult to identify and classify cellular interactions accurately. Additionally, large volumes of manually annotated data are required to train robust algorithms, and variability in sample staining can affect the consistency of results. Finally, the integration of histological data with other types of data remains a considerable technical and analytical challenge. In this study, we propose a novel approach to define the TME as the interaction zones between tumor, necrotic, and stroma tissues. These zones were classified using a Support Vector Machine (SVM) with an average classification accuracy of 80 %. To establish the relevance of the TME in ovarian cancer, we used its association with survival outcomes using Cox regression modeling. The cases were categorized into high and low-risk groups based on survival time. The results demonstrated a significant correlation using hand-crafted features extracted from the TME, the Cox regression exhibited a notable hazard ratio of 2, 59 (95 % CI: 1, 06 − 6, 3, p = 0,03), indicating a statistically significant impact between TME and survival rate. This methodology suggests that TME organization could serve as a predictive marker in serous carcinoma of the ovary, providing valuable insights into the role of the tumor microenvironment in disease development.eng
dc.description.abstractEl microambiente tumoral (TME) abarca las interacciones din´amicas entre un tumor y los tejidos circundantes, desempe˜nando un papel crucial en la progresi´on del c´ancer. Las im´agenes histol´ogicas proporcionan informaci´on valiosa sobre las caracter´ısticas del TME. Las t´ecnicas de patolog´ıa computacional han logrado avances significativos en la automatizaci´on de la identificaci´on y clasificaci´on de estas interacciones; sin embargo, a´un persisten ciertas limitaciones, como la complejidad y heterogeneidad del microambiente, lo que dificulta la identificaci´on y clasificaci´on de las interacciones celulares. Adem´as, se requiere de grandes vol´umenes de datos anotados manualmente para entrenar algoritmos robustos, y la variabilidad en la tinci´on de muestras puede afectar la consistencia de los resultados. Por ´ultimo, la integraci´on de datos histol´ogicos con otros tipos de datos sigue siendo un desaf´ıo t´ecnico y anal´ıtico considerable. En este estudio, proponemos un enfoque novedoso para definir el TME como las zonas de interacci´on entre los tejidos tumorales, necr´oticos y del estroma. Estas zonas se clasificaron utilizando una m´aquina de vectores de soporte (SVM) con una precisi´on de clasificaci´on promedio de 80 %. Para establecer la relevancia del TME en el c´ancer de ovario, utilizamos su asociaci´on con los resultados de supervivencia mediante la regresi´on de Cox. Los casos se clasificaron en grupos de alto y bajo riesgo seg´un el tiempo de supervivencia. Los resultados demostraron una correlaci´on significativa utilizando caracter´ısticas hechas a mano extra´ıdas del TME, la regresi´on de Cox mostr´o un ´ındice de riesgo notable de 2, 59 (95 % CI: 1, 06−6, 3, p = 0,03), lo que indica un impacto estad´ısticamente significativo entre el TME y la tasa de supervivencia. Esta metodolog´ıa sugiere que la organizaci´on TME podr´ıa servir como marcador predictivo en el carcinoma seroso de ovario, proporcionando informaci´on valiosa sobre el papel del microambiente tumoral en el desarrollo de la enfermedad (Texto tomado de la fuente).spa
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagister en Ingeniería Biomédicaspa
dc.description.methodsManual annotation was performed on 30 whole slide images (WSIs) by a pathologist to classify tissues into three distinct classes: stroma (green), tumor (red), and necrotic (blue). From each WSI, Consecutive patches of size 224 × 224 pixels were selected for further analysis. These patches were chosen because they provide an optimal balance between computational efficiency and detailed tissue representation. The dataset was constructed by randomly selecting 20,000 patches per tissue type, resulting in a total of 60,000 patches, not overlaping. This dataset was then divided into training and test subsets using a 70-30 split: 70 % (21 patients) for training and 30 % (9 patients) for testing. Additionally, a 10-fold cross-validation was performed to ensure robustness and generalization of the models.spa
dc.description.researchareaPatologia computacionalspa
dc.format.extentxi, 34 páginasspa
dc.format.mimetypeapplication/pdfspa
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.repoRepositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/86841
dc.language.isoengspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.facultyFacultad de Medicinaspa
dc.publisher.placeBogotá, Colombiaspa
dc.publisher.programBogotá - Medicina - Maestría en Ingeniería Biomédicaspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseAtribución-SinDerivadas 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/spa
dc.subject.ddc620 - Ingeniería y operaciones afinesspa
dc.subject.ddc610 - Medicina y salud::614 - Medicina Forense; incidencia de lesiones, heridas, enfermedades; medicina preventiva públicaspa
dc.subject.ddc610 - Medicina y salud::616 - Enfermedadesspa
dc.subject.decsMicroambiente Tumoralspa
dc.subject.decsTumor Microenvironmenteng
dc.subject.decsNeoplasias Ováricasspa
dc.subject.decsOvarian Neoplasmseng
dc.subject.decsTécnicas Histológicasspa
dc.subject.decsHistological Techniqueseng
dc.subject.decsCélulas del Estromaspa
dc.subject.decsStromal Cellseng
dc.subject.proposalMicroambiente tumoralspa
dc.subject.proposalCarcinoma seroso de ovariospa
dc.subject.proposalRiesgo de supervivenciaspa
dc.subject.proposalHistopatología computacionalspa
dc.subject.proposalTumor microenvironmenteng
dc.subject.proposalSerous carcinomas cancer ovaryeng
dc.subject.proposalSurvival riskeng
dc.subject.proposalComputational histopathologyeng
dc.titleFinding out tumor microenvironment characteristics associated with the progression of ovarian cancereng
dc.title.translatedDeterminación de características del microambiente tumoral asociadas con la progresión del cáncer de ovariospa
dc.typeTrabajo de grado - Maestríaspa
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aaspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.redcolhttp://purl.org/redcol/resource_type/TMspa
dc.type.versioninfo:eu-repo/semantics/acceptedVersionspa
dcterms.audience.professionaldevelopmentEstudiantesspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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