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dc.contributor.advisorEstupiñán Torres., Sandra Mónica
dc.contributor.advisorParra GiraldoClaudia Marcela, Claudia Marcela
dc.contributor.advisorVargas Casanova, Yerly
dc.contributor.authorMárquez Torres, Mateo
dc.date.accessioned2022-10-18T16:26:24Z
dc.date.available2022-10-18T16:26:24Z
dc.date.issued2022
dc.identifier.urihttps://repositorio.universidadmayor.edu.co/handle/unicolmayor/5715
dc.description.abstractLos péptidos antimicrobianos (PAMs) se han considerado como una estrategia de tratamiento antimicótica prometedora, ya que cuentan con baja capacidad para inducir resistencia, poseen varios mecanismos de acción, son de amplio espectro y su combinación con antifúngicos convencionales puede generar efecto sinérgico, sin embargo, como desventajas se encuentra altos costos de producción, fácil degradación proteolítica, toxicidad en células eucariotas y hemólisis sobre los glóbulos rojos. La Lactoferricina Bovina (LfcinB) es un PAM generado tras la hidrólisis proteica de Lactoferrina Bovina (LFB), por su parte la Buforina II (BFII) es un PAM aislado del estómago del sapo Bufo bufo gargarizans. Los péptidos mencionados anteriormente se les ha atribuido un gran potencial antimicrobiano. Con la finalidad de potenciar la actividad antifúngica, se diseñaron y sintetizaron quimeras ramificadas que contienen los motivos mínimos de ambos péptidos (LfcinB: RRWQWR y BFII: RLLR), además se evaluó su actividad hemolítica y el efecto de combinar estas quimeras con fluconazol. Como resultados se obtuvo que el péptido (RRWQWR)2KXRLLRRLLR presentó mayor actividad antifúngica (Concentración mínima inhibitoria y fungicida) CMI/CMF 50 µg/mL (15.27 µM)) en comparación con la quimera (RRWQWR)2KXRLLR (CMI/CMF de 100 µg/mL (36.56 µM) contra C. albicans sensible y resistente a fluconazol. La quimera (RRWQWR)2KXRLLR no exhibió actividad hemolítica mientras que (RRWQWR)2KXRLLRRLLR presentó porcentaje de hemólisis de 11.56% a la concentración de la CMI. Con respecto a la combinación de los péptidos quiméricos ramificados junto con fluconazol, se obtuvo sinergia con ambos péptidos cuando se evaluaron frente a C. albicans sensible a este antifúngicospa
dc.description.tableofcontentsTabla de contenido Pág. 1. INTRODUCCIÓN.2 2. ANTECEDENTES 5 3. MARCO TEÓRICO.10 3.1 Generalidades Candida albicans..10 3.1.1 Patogenia.10 3.1.2 Manifestaciones clínicas ..12 3.1.3 Antifúngicos para Candidiasis invasiva..12 3.1.4 Mecanismos de resistencia a antifúngicos.12 3.2 Péptidos antimicrobianos.13 3.3 Lactoferrina Bovina .14 3.3 Lactoferricina Bovina.14 3.5 Buforina I.16 3.6 Buforina II16 4. OBJETIVOS ..18 4.1 Objetivo general..18 4.2 Objetivos específicos.18 5. DISEÑO METODOLÓGICO .19 5.1. Materiales19 5.1.1 Candida albicans SC5314 (Robin) Berkhout (ATCC® MYA- 2876™)19 5.1.2 Candida albicans 256 HUSI-PUJ 20 3.2 Hipótesis21 5.2. Estrategia de trabajo 21 5.3.1 Síntesis y caracterización de los péptidos22 5.3.2 Determinación de la Concentración Mínima Inhibitoria ..22 5.3.3 Concentración Mínima Fungicida23 5.3.4 Curvas de letalidad .24 5.3.5 Determinación de la actividad hemolítica .24 5.3.6 Ensayo de titulación en tablero de ajedrez25 6. RESULTADOS Y DISCUSIÓN ..27 6.1 Etapa 1: Microdilución en caldo y CMF27 6.2 Etapa 2: Cinética de actividad de péptidos quiméricos ramificados ..30 6.3 Etapa 3: Efecto hemolítico de los péptidos quiméricos ramificados34 6.4 Efecto combinado de los péptidos quiméricos ramificados mezclados con fluconazol..37 7. CONCLUSIONES .40 6. Referencias Bibliográficas41 Anexos50 Anexo 1. CMI y CMF50 Anexo 2. Actividad hemolítica. .52 Anexo 3. Titulación en tablero de ajedrez 53spa
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dc.format.mimetypeapplication/pdfspa
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dc.rightsDerechos Reservados - Universidad Colegio Mayor de Cundinamarca, 2022eng
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0/spa
dc.titleEvaluación de la actividad anti-Candida de péptidos quiméricos ramificados derivados de Lactoferricina Bovina y Buforina II.spa
dc.typeTrabajo de grado - Pregradospa
dc.description.degreelevelPregradospa
dc.description.degreenameBacteriólogo(a) y Laboratorista Clínicospa
dc.publisher.facultyFacultad de Ciencias de la Saludspa
dc.publisher.placeBogotáspa
dc.publisher.programBacteriología y Laboratorio Clínicospa
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dc.rights.creativecommonsAtribución-NoComercial-CompartirIgual 4.0 Internacional (CC BY-NC-SA 4.0)spa
dc.subject.proposalCandida albicanseng
dc.subject.proposalLactoferricina bovinaspa
dc.subject.proposalBuforinaIIspa
dc.subject.proposalPéptidos antimicrobianosspa
dc.subject.proposalQuimeraseng
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