Evaluación de las propiedades mecánicas de hidrogeles biodegradables a base de polietilenglicol diacrilado, con potencial uso en el diseño de matrices para úlceras crónicas

dc.contributor.advisorSolarte David, Víctor Alfonsospa
dc.contributor.advisorBecerra Bayona, Silvia Milenaspa
dc.contributor.apolounabBecerra Bayona, Silvia Milena [silvia-milena-becerra-bayona]
dc.contributor.authorBayona Velasco, Geydi Alexandraspa
dc.contributor.cvlachttps://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001363781*
dc.contributor.cvlacBecerra Bayona, Silvia Milena [0001568861]
dc.contributor.googlescholarBecerra Bayona, Silvia Milena [5wr21EQAAAAJ]
dc.contributor.linkedinBecerra Bayona, Silvia Milena [silvia-becerra-3174455a]
dc.contributor.orcidBecerra Bayona, Silvia Milena [0000-0002-4499-5885]
dc.contributor.researchgateBecerra Bayona, Silvia Milena [Silvia-Becerra-Bayona]
dc.contributor.scopusBecerra Bayona, Silvia Milena [36522328100]
dc.coverage.campusUNAB Campus Bucaramangaspa
dc.coverage.spatialColombiaspa
dc.date.accessioned2020-12-03T17:11:50Z
dc.date.available2020-12-03T17:11:50Z
dc.date.issued2020
dc.degree.nameIngeniero Biomédicospa
dc.description.abstractLa cicatrización de úlceras crónicas de pie diabético (UCPD), es un proceso complejo y dinámico que requiere de una interacción entre factores regulados que trabajan en conjunto para restituir la piel lesionada. Los niveles altos de metaloproteinasas de matriz (MPMs) en las UCPD contribuyen a la cronicidad de la herida, lo que puede llevar a incrementar el riesgo de infecciones, provocando complicaciones que influyen en la calidad de vida del paciente. Por lo tanto, existe la necesidad de desarrollar alternativas terapéuticas que permitan la correcta cicatrización de la herida; entre los nuevos enfoques se destacan el uso de hidrogeles de polietilenglicol diacrilado (PEGDA), el cual se puede modificar mediante la introducción de dominios de corte para MPMs con el fin de que, las altas concentraciones de estas proteasas en la úlcera sean aprovechadas para degradar el material sintético. En consecuencia, en este estudio se fabricaron hidrogeles biodegradables derivados de PEGDA (7.34 kDa), en tres diferentes concentraciones (10, 20 y 30% p/v); los hidrogeles se polimerizaron en luz UV, en presencia de dos sistemas diferentes de fotoiniciador (Irgacure 2959, disuelto en NVP o en 70% etanol), las propiedades estructurales del hidrogel como la capacidad de hinchamiento, se evaluó a partir de la relación volumétrica de hinchamiento y el tamaño de poro teórico se calculó mediante la correlación con el módulo elástico experimental, mientras que el módulo elástico y de compresión fueron determinados mediante pruebas de tracción y compresión. Los resultados obtenidos de los hidrogeles de PEGDA biodegradables por MPMs, demuestran que, poseen excelentes propiedades mecánicas y físicas, ya que son similares a la piel; por lo tanto, podrían tener gran potencial en la curación de UCPD.spa
dc.description.abstractenglishHealing of chronic diabetic foot ulcers (CDFU) is a complex and dynamic process that requires an interaction between regulated factors that work together to restore damaged skin. The high levels of matrix metalloproteinases (MMP) in the CDFU affect the chronicity of the wound, which can lead to an increased risk of infections, causing complications that influence the quality of life of the patient. Therefore, there is a need to develop therapeutic alternatives that could correct wound healing; New approaches include the use of diacrylated polyethylene glycol (PEGDA) hydrogels, which can be modified by introducing cut domains for MMPs so that high concentrations of these proteases in the ulcer are exploited to degrade Synthetic material. Consequently, in this study, biodegradable hydrogels derived from PEGDA (7.34 kDa) were manufactured, in three different concentrations (10, 20 and 30% w / v); hydrogels were polymerized in UV light, in the presence of two different photoinitiator systems (Irgacure 2959, dissolved in NVP or in 70% ethanol), the structural properties of the hydrogel, as well as the swelling capacity, were evaluated from the volumetric ratio of swelling and theoretical pore size will be calculated by correlation with the experimental elastic modulus, while the elastic and compression modulus were determined by tensile and compression tests. The results obtained from PEGDA hydrogels biodegradable by MPM, could have excellent mechanical and physical properties, since they are similar to the skin; therefore, it could have great potential in the healing of CDFU.eng
dc.description.degreelevelPregradospa
dc.description.learningmodalityModalidad Presencialspa
dc.description.tableofcontentsCapítulo 1 Problema u oportunidad ...........................................................................................10 1.1 Introducción ............................................................................................................10 1.2 Planteamiento del problema.....................................................................................11 1.3 Justificación ............................................................................................................12 1.4 Pregunta Problema ..................................................................................................13 1.5 Objetivo General .....................................................................................................13 1.6 Objetivos específicos...............................................................................................13 1.7 Limitaciones y delimitaciones .................................................................................14 Capítulo 2 Marco teórico..........................................................................................................15 2.1 La piel .....................................................................................................................15 2.2 Úlcera de pie diabético ............................................................................................21 2.3 Andamios................................................................................................................24 2.4 Hidrogeles...............................................................................................................25 2.4.1. Estructura de los hidrogeles .................................................................................25 2.4.2. Capacidad de hinchamiento de los hidrogeles.......................................................26 2.4.3. Correlación entre la capacidad de hinchamiento y el tamaño de poro de los hidrogeles..........................................................................................................................27 2.5 Hidrogeles de polietilenglicol diacrilado (PEGDA) .................................................29 2.5.1. Propiedades mecánicas del PEGDA .....................................................................30 2.5.2. Degradación del hidrogel de PEGDA...................................................................31 Capítulo 3 Estado del arte..........................................................................................................33 Capítulo 4 Metodología.............................................................................................................37 4.1 Síntesis del copolímero derivado de PEGDA con secuencias peptídicas degradables (PEGDA-BD)....................................................................................................................37 4.2 Fabricación de los hidrogeles biodegradables derivados de PEGDA. .......................37 4.3 Evaluación de la capacidad de hinchamiento de los hidrogeles ................................38 4.4 Evaluación del tamaño de poro de los hidrogeles.....................................................38 4.5 Caracterización mecánica de los hidrogeles.............................................................39 4.6 Análisis estadísticos.................................................................................................40 Capítulo 5 Resultados y Análisis de Resultados.........................................................................41 5.1 Resultados...................................................................................................................41 5.1.1. Síntesis y fabricación de los hidrogeles de PEGDA-BD .......................................41 5.1.2. Caracterización mecánica de los hidrogeles de PEGDA-BD y PEGDA-Control...42 5.1.3. Evaluación de la capacidad de hinchamiento de los hidrogeles.............................47 5.1.4. Evaluación del tamaño de poro promedio de los hidrogeles..................................51 5.1.5. Relación entre el Módulo elástico y la capacidad de hinchamiento de los hidrogeles en función de la densidad de entrecruzamiento. .................................................................55 5.2 Análisis de resultados..............................................................................................57 Capítulo 6 Conclusiones y recomendaciones.............................................................................62 Lista de referencias ...................................................................................................................64 Apéndice...................................................................................................................................68spa
dc.format.mimetypeapplication/pdfspa
dc.identifier.instnameinstname:Universidad Autónoma de Bucaramanga - UNABspa
dc.identifier.reponamereponame:Repositorio Institucional UNABspa
dc.identifier.repourlrepourl:https://repository.unab.edu.cospa
dc.identifier.urihttp://hdl.handle.net/20.500.12749/11845
dc.language.isospaspa
dc.publisher.facultyFacultad Ingenieríaspa
dc.publisher.grantorUniversidad Autónoma de Bucaramanga UNABspa
dc.publisher.programPregrado Ingeniería Biomédicaspa
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dc.rights.accessrightshttp://purl.org/coar/access_right/c_abf2spa
dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.creativecommonsAtribución-NoComercial-SinDerivadas 2.5 Colombia*
dc.rights.localAbierto (Texto Completo)spa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.5/co/*
dc.subject.keywordsBiomedical engineeringeng
dc.subject.keywordsEngineeringeng
dc.subject.keywordsMedical electronicseng
dc.subject.keywordsBiological physicseng
dc.subject.keywordsBioengineeringeng
dc.subject.keywordsMedical instruments and apparatuseng
dc.subject.keywordsMedicineeng
dc.subject.keywordsDiacrylated polyethyleneeng
dc.subject.keywordsGlycoleng
dc.subject.keywordsHydrogelseng
dc.subject.keywordsMesh sizeeng
dc.subject.keywordsModulus of elasticityeng
dc.subject.keywordsExtracellular matrixeng
dc.subject.keywordsGranulation tissueeng
dc.subject.keywordsFoot diseaseseng
dc.subject.keywordsPolymethylmethacrylateeng
dc.subject.lembIngeniería biomédicaspa
dc.subject.lembIngenieríaspa
dc.subject.lembBiofísicaspa
dc.subject.lembBioingenieríaspa
dc.subject.lembMedicinaspa
dc.subject.lembTejido de granulaciónspa
dc.subject.lembEnfermedades de los piesspa
dc.subject.lembPolimetilmetacrilatospa
dc.subject.proposalIngeniería clínicaspa
dc.subject.proposalClinical engineeringspa
dc.subject.proposalElectrónica médicaspa
dc.subject.proposalInstrumentos y aparatos médicosspa
dc.subject.proposalPolietilenglicol diacriladospa
dc.subject.proposalHidrogelesspa
dc.subject.proposalTamaño de porospa
dc.subject.proposalMódulo de elasticidadspa
dc.subject.proposalMatriz extracelularspa
dc.titleEvaluación de las propiedades mecánicas de hidrogeles biodegradables a base de polietilenglicol diacrilado, con potencial uso en el diseño de matrices para úlceras crónicasspa
dc.title.translatedEvaluation of the mechanical properties of biodegradable hydrogels based on diacrylated polyethylene glycol, with potential use in the design of matrices for chronic ulcersspa
dc.type.coarhttp://purl.org/coar/resource_type/c_7a1f
dc.type.driverinfo:eu-repo/semantics/bachelorThesis
dc.type.hasversioninfo:eu-repo/semantics/acceptedVersion
dc.type.localTrabajo de Gradospa
dc.type.redcolhttp://purl.org/redcol/resource_type/TPspa

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