Diseño, síntesis y evaluación preliminar de la actividad antigénica de péptidos ramificados MAPs derivados de un antígeno de la proteína Spike del virus SARS-CoV-2

dc.contributor.advisorTorres Rodríguez, Ángela Graciela
dc.contributor.advisorRosas Pérez, Jaiver Eduardo
dc.contributor.authorTorres Lemus, John Alexander
dc.contributor.projectleaderLozano Moreno, Jose Manuel
dc.contributor.researchgroupMimetismo Molecular de Los Agentes Infecciosos
dc.date.accessioned2025-09-02T15:28:52Z
dc.date.available2025-09-02T15:28:52Z
dc.date.issued2025
dc.descriptionilustraciones, diagramasspa
dc.description.abstractEl coronavirus SARS-CoV-2 utiliza la proteína Spike para el ingreso a su hospedero, por lo que esta proteína es un blanco importante para diferentes alternativas de diagnóstico y prevención. Por esto, en el grupo de investigación mimetismo molecular de los agentes infecciosos, se han evaluado un número considerable de secuencias peptídicas derivadas de la proteína Spike y su perfil antigénico. Con base en los resultados de esos estudios, en este trabajo se busca evaluar si es posible obtener mediante síntesis en fase sólida formas poliméricas ramificadas tipo MAPs (Péptidos antigénicos múltiples) diméricas y tetraméricas de secuencias peptídicas seleccionadas de la proteína Spike y evaluar de manera preliminar su actividad antigénica. Para esto, primero se seleccionaron péptidos cortos con una secuencia derivada de un motivo viral único de Spike denominado SVM-13, de acuerdo con sus perfiles antigénicos frente a sueros murinos. De esta manera se seleccionaron 3 secuencias provenientes del carboxilo terminal, del amino terminal y de la región central de SVM-13 y su forma polimérica PHE-14, nombrados respectivamente SVM-117, SVM-125 y SVM-127, los cuales presentaron el mejor reconocimiento antigénico. Posteriormente, se realizó la síntesis en fase sólida de los polímeros lineales y los MAPs diméricos y tetraméricos de las secuencias seleccionadas, obteniendo exitosamente los péptidos poliméricos mediante la estrategia Fmoc/tBu, obteniendo rendimientos en el proceso superiores al 50%. Todas las moléculas sintetizadas fueron caracterizadas utilizando cromatografía RP-HPLC y espectrometría de masas MALDI-TOF, evidenciando purezas para los MAPs superiores al 85%. La actividad antigénica de los péptidos sintéticos obtenidos se evaluó de manera preliminar por su inoculación en modelo murino BALB/c y el posterior análisis de los anticuerpos séricos mediante inmunoensayos ELISA, observándose el reconocimiento antigénico de varios péptidos poliméricos especialmente los derivados de SVM-117. (Texto tomado de la fuente)spa
dc.description.abstractThe SARS-CoV-2 coronavirus uses the Spike protein for entry to its host, so this protein is an important target for different diagnostic and prevention alternatives. Therefore, in the research group on molecular mimicry of infectious agents, a considerable number of peptide sequences derived from the Spike protein and its antigenic profile have been evaluated. Based on the results of these studies, this work aims to assess whether it is possible to obtain by solid phase synthesis branched polymeric forms such as MAPs (multiple antigenic peptides) dimeric and tetrameric sequences of selected peptide sequences from the Spike protein and perform a preliminary evaluation of their antigenic activity. For this, short peptides were first selected with a sequence derived from a unique viral Spike motif called SVM-13 and its polymeric form PHE-14, according to their antigenic profiles against murine sera. Three sequences from the carboxyl terminal, amino terminal, and central region of SVM-13 were selected, named SVM-117, SVM-125, and SVM-127, which presented the best antigenic recognition. Subsequently, solid phase synthesis of linear polymers and dimeric and tetrameric MAPs was performed from the selected sequences, successfully obtaining the polymeric peptides using the Fmoc/tBu strategy, obtaining process yields of more than 50%. All synthesized molecules were characterized using RP-HPLC chromatography and MALDI-TOF mass spectrometry, evidencing purities for MAPs greater than 85%. The antigenic activity of the obtained synthetic peptides was evaluated in a preliminary way by their inoculation in murine model BALB/c and the subsequent analysis of their serum antibodies by immunoassays ELISA, antigenic recognition of several polymeric peptides especially SVM-117 derivatives.eng
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Ciencias – Farmacología
dc.description.researchareaBiotecnología en salud
dc.format.extentxii, 78 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/88534
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotá
dc.publisher.facultyFacultad de Ciencias
dc.publisher.placeBogotá, Colombia
dc.publisher.programBogotá - Ciencias - Maestría en Ciencias - Farmacología
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.licenseAtribución-NoComercial 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subject.decsFarmacologíaspa
dc.subject.decsPharmacologyeng
dc.subject.decsBioquímicaspa
dc.subject.decsBiochemistryeng
dc.subject.decsCoronavirusspa
dc.subject.decsCoronaviruseng
dc.subject.proposalPéptidos antigénicos Múltiples MAPsspa
dc.subject.proposalSpikespa
dc.subject.proposalSARS- CoV-2spa
dc.subject.proposalPéptidos poliméricos sintéticosspa
dc.subject.proposalMultiple Antigen peptides MAPseng
dc.subject.proposalSpikeeng
dc.subject.proposalSARS- CoV-2eng
dc.subject.proposalSynthetic polymeric peptideseng
dc.titleDiseño, síntesis y evaluación preliminar de la actividad antigénica de péptidos ramificados MAPs derivados de un antígeno de la proteína Spike del virus SARS-CoV-2spa
dc.title.translatedDesign, synthesis, and preliminary evaluation of the antigenic activity of branched peptides MAPs derived from a SARS-CoV-2 virus spike protein antigeneng
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.professionaldevelopmentPúblico general
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2

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