Optimización de un cultivo celular tridimensional para evaluar la respuesta inducida por Aggregatibacter actinomycetemcomitans en células endoteliales

dc.contributor.advisorFontanilla Duque, Martha Raquel
dc.contributor.advisorGualtero Escobar, Diego Fernando
dc.contributor.authorTorres Amaya, Maria Alejandra
dc.contributor.researchgroupGrupo de Trabajo en Ingeniería de Tejidosspa
dc.date.accessioned2021-10-12T13:59:44Z
dc.date.available2021-10-12T13:59:44Z
dc.date.issued2020-07-07
dc.descriptionilustraciones, gráficas, tablasspa
dc.description.abstractEn este trabajo se optimizó cultivo celular tridimensional (3D) de Células Endoteliales de Arteria Coronaria Humana (HCAEC) sobre soportes de colágeno tipo I para el estudio de la respuesta celular inducida por la presencia de Aggregatibacter actinomycetemcomitans, como modelo in vitro de enfermedad aterosclerótica. Se realizaron pruebas de caracterización fisicoquímica y la estandarización de un procedimiento que permitiera obtener soportes de colágeno tipo I sobre la cara apical completamente adheridos a las paredes internas de Insertos TranswellTM; luego sobre estos, se sembraron 5x105 HCAEC/inserto (cultivo 3D-HCAEC) con el fin de determinar la formación de monocapa y posteriormente, se infectó con A. actinomycetemcomitans a MOI 1:1, 1:10 y 1:100; se utilizaron como controles cultivos sin infección, así como con estimulación con LPS-Aa (1µg/mL), finalmente, se realizó un co-cultivo con monocitos THP-1, con el fin de evaluar procesos inflamatorios -migración y adhesión- al cultivo 3D-HCAEC; se realizaron ensayos por citometría de flujo con el fin de detectar las citocinas proinflamatorias, y la expresión de TGF-β1 mediante ELISA. La serie de experimentos se realizó por triplicado y la significancia para cada grupo fue tomada con p<0.05. Los resultados obtenidos permitieron determinar un cultivo 3D-HCAEC por 7 días, en donde se observó viabilidad y formación de monocapa continua sobre el soporte de colágeno elaborado, además se demostró la función de barrera endotelial. Los cultivos 3D-HCAEC infectados con A. actinomycetemcomitans a los diferentes MOI utilizados indujeron diferencias significativas con respecto al control en la adhesión y migración de monocitos THP-1. De igual manera, se mostró aumentos significativos respecto a los controles en la expresión los factores proinflamatorios: MCP-1, IL-8, IL-6 y TGF-β1. Estos resultados in vitro indican el potencial de A. actinomycetemcomitans en inducir una respuesta inflamatoria pro-aterosclerótica mediante un mecanismo de adhesión, migración de monocitos y disfunción endotelial. (Texto tomado de la fuente).spa
dc.description.abstractThe role of periodontopathogens in inflammatory endothelial dysfunction is not known. This study characterizes a three-dimensional model with human coronary artery endothelial cells on three-dimensional (HCAEC-3D) type I collagen scaffolds to evaluate whether infection with Aggregatibacter actinomycetemcomitans induces a proinflammatory response associated with atherosclerosis. The HCAEC-3D culture was physicochemically characterized with regard to biocompatibility and barrier function. Then, the culture was infected with A. actinomycetemcomitans strain ATCC 29522 at multiplicities of infection (MOIs) of 1:1, 1:10, and 1:100. Cultures without infection and stimulated with A. actinomycetemcomitans lipopolysaccharide were used as controls. The secretion of soluble factors (IL-6, IL-1β, MCP-1, RANTES, MIP-1, IL-8, IL-1α, and TNF-α) was evaluated via flow cytometry; TGF-β1 was evaluated via enzyme-linked immunosorbent assay (ELISA). The adhesion and migration of fluorescent human THP-1 monocytes was evaluated. IL-8, MCP-1, and IL-6 secretion increased in a dose-dependent manner with A. actinomycetemcomitans infection and was significantly greater than that under control treatment. The concentration of TGF-β1 was significantly higher at MOI 1:100 than in controls. Treatment of the 3D cultures with A. actinomycetemcomitans at different MOIs induced significant differences in the adhesion of monocytes to the endothelium compared to the control without infection. Lastly, conditioned media from 3D cultures treated with A. actinomycetemcomitans induced monocyte migration. The effects of IL-8, MCP-1, IL-6, and TGF-β1 on the endothelium indicate the ability of A. actinomycetemcomitans to induce an inflammatory response through a mechanism of monocyte adhesion and migration and endothelial dysfunction.eng
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagíster en Ciencias - Microbiologíaspa
dc.description.researchareaBiotecnología en saludspa
dc.format.extent76 páginasspa
dc.format.mimetypeapplication/pdfspa
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/80508
dc.language.isospaspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.departmentInstituto de Biotecnología (IBUN)spa
dc.publisher.facultyFacultad de Cienciasspa
dc.publisher.placeBogotá, Colombiaspa
dc.publisher.programBogotá - Ciencias - Maestría en Ciencias - Microbiologíaspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/spa
dc.subject.ddc610 - Medicina y saludspa
dc.subject.decsEndotelio Vascularspa
dc.subject.decsEndothelium, Vasculareng
dc.subject.decsAterosclerosisspa
dc.subject.decsAtherosclerosiseng
dc.subject.decsPeriodontitisspa
dc.subject.decsPeriodontitiseng
dc.subject.proposalColágeno tipo Ispa
dc.subject.proposalCélulas endotelialesspa
dc.subject.proposalAggregatibacter actinomycetemcomitansspa
dc.subject.proposalDisfunción endotelialspa
dc.subject.proposalAterosclerosisspa
dc.subject.proposalType I collageneng
dc.subject.proposalEndothelial cellseng
dc.subject.proposalEndothelial disfunctioneng
dc.subject.proposalAtherosclerosiseng
dc.titleOptimización de un cultivo celular tridimensional para evaluar la respuesta inducida por Aggregatibacter actinomycetemcomitans en células endotelialesspa
dc.title.translatedOptimization of a three-dimensional cell culture to evaluate the response induced by Aggregatibacter actinomycetemcomitans in endothelial cellseng
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
dcterms.audience.professionaldevelopmentPúblico generalspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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