Mostrar el registro sencillo del ítem

dc.contributor.advisorConstanza Muñoz, Liliana
dc.contributor.authorGutierrez Riveros, Sergio Alejandro
dc.date.accessioned2022-03-04T17:54:57Z
dc.date.available2022-03-04T17:54:57Z
dc.date.issued2019
dc.identifier.urihttps://repositorio.unicolmayor.edu.co/handle/unicolmayor/4769
dc.description.abstractLos derivados del péptido LL- 37, una catelicidina del sistema inmune han sido ampliamente estudiados por sus efectos antimicrobianos; en el presente estudio se evalúa el efecto antibiopelicula de sus derivados LL37- 1 y DLL-37 diseñados por el grupo de investigación REMA sobre la expresión de algunas proteínas del sistema de Quorum sensing, para ello se evaluó la presencia de algunos genes de complejo agr, se tipificó el AIP por medio de PCR convencional y se realizó un análisis de expresión relativa de los genes del sistema por medio de PCR en tiempo real para aislamientos clínicos de S. aureus y S. epidermidis productores de biopelicula. En cada una de las cepas se encontró al menos uno de los genes del complejo, con lo cual se pudo evidenciar la presencia del sistema en todas las cepas estudiadas, en cuanto al efecto de los péptidos sobre su expresión se observan diferentes efectos individuales para cada una de las cepas que las cepas de S. aureus tienen una disminución de la expresión del gen agrA a las 8 y 10 horas con el péptido LL-37 y las cepas de S. epidermidis a la 10 horas con el péptido DLL-37 para el gen agrB.spa
dc.description.tableofcontentsÍNDICE 2 ÍNDICE DE GRAFICAS 4 ÍNDICE DE TABLAS 6 ÍNDICE DE ANEXOS 7 GRÁFICAS DE ANEXOS 8 TABLAS DE ANEXOS 8 RESUMEN 9 OBJETIVOS 10 INTRODUCCIÓN 11 MARCO TEORICO 13 1. Staphylococcus sp. 13 a. Staphylococcus aureus 13 b. Staphylococcus epidermidis 13 2. Quorum sensing (QS) 14 a. agrA 15 b. agrB 15 c. agrC 16 d. agrD 16 3. Péptido LL-37 17 METODOLOGÍA 18 1. Determinar mediante herramientas de bioinformática los primers para los genes agrA, agrB agrC, agrD que intervienen en el proceso de Quorum sensing en cepas de S. aureus y S. epidermidis. a. Definir las secuencias consenso de cada uno de los genes 18 b. Comprobar de la especificidad de los primers 19 c. Diferenciar los genes autoinductores para QS en las cepas de S. aureus y S. epidermidis 21 2. Identificar los genes del operon agr y los autoinductores que intervienen en el proceso de Quorum sensing en cepas de S. aureus y S. epidermidis. a. Extracción de ADN de los aislamientos de S. aureus y S. epidermidis 22 b. Amplificación de los genes en estudio 22 c. Visualización de los productos de amplificación 23 3. Medir la expresión de los genes agr involucradas en el Quorum sensing en cepas de S. aureus y S. epidermidis en ausencia y presencia de los péptidos LL-37 y DLL-37 a. Extracción de ARN 23 b. Síntesis del cDNA 23 c. Cuantificación de los ácidos nucleicos 23 d. Expresión de los genes 23 e. Análisis estadístico 24 RESULTADOS 25 DISCUSIÓN 36 CONCLUSIÓN 39 BIBLIOGRAFIA 40 ANEXOS 45spa
dc.format.extent51p.spa
dc.format.mimetypeapplication/pdfspa
dc.language.isospaspa
dc.publisherUniversidad Colegio Mayor de Cundinamarcaspa
dc.rightsDerechos Reservados - Universidad Colegio Mayor de Cundinamarca, 2019spa
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0/spa
dc.titleEfecto de los péptidos ll-37 sobre la expresión de proteínas del Quorum sensing en cepas de s. Aureus y s. Epidermidisspa
dc.typeTrabajo de grado - Pregradospa
dc.description.degreelevelPregradospa
dc.description.degreenameBacteriólogo(a) y Laboratorista Clínicospa
dc.identifier.barcode58684
dc.publisher.facultyFacultad de Ciencias de la Saludspa
dc.publisher.placeBogotá D.Cspa
dc.publisher.programBacteriología y Laboratorio Clínicospa
dc.relation.referencesWeiner L, Webb A, Limbago B, Dudeck M, Patel J, Kallen A et al. Antimicrobial-Resistant Pathogens Associated With Healthcare-Associated Infections: Summary of Data Reported to the National Healthcare Safety Network at the Centers for Disease Control and Prevention, 2011–2014. Infection Control & Hospital Epidemiology [Internet]. 2016 [cited 15 February 2018]; 37(11):1288-1301. Available from: https://www.cdc.gov/nhsn/pdfs/datastat/2014-AR-data-summary-nhsn.pdfspa
dc.relation.referencesLondon: Health Protection Agency. Surveillance of Surgical Site Infections in NHS Hospitals in England. Londres; 2012 p. 1- 32.spa
dc.relation.referencesA report from the NNIS System. National Nosocomial Infections Surveillance (NNIS) System Report, data summary from January 1992 through June 2004, issued October 2004. American Journal of Infection Control [Internet]. 2004 [cited 16 February 2018]; 32(8):470-485. Available from: https://www.cdc.gov/nhsn/pdfs/datastat/nnis_2004.pdfspa
dc.relation.referencesGrupo Para el Control de la Resistencia Antimicrobiana en Bogotá (GREBO). Resultados de la vigilancia de la resistencia bacteriana año 2016 Componente pediátrico y adulto Análisis de percentiles marcadores de resistencia 2016. Componente pediátrico y adulto. Tendencias de los principales marcadores de resistencia 2008-2016 [Internet]. Bogotá D. C.; 2017. Available from: http://www.grebo.org/documentos/Boletin_Grebo_2017.PDFspa
dc.relation.referencesHancock R, Sahl H. Antimicrobial and host-defense peptides as new anti-infective therapeutic strategies. Nature Biotechnology. 2006; 24(12):1551-1557spa
dc.relation.referencesEpand R, Vogel H. Diversity of antimicrobial peptides and their mechanisms of action. Biochimica et Biophysica Acta (BBA) – Biomembranes. 1999; 1462(1-2):11-28.spa
dc.relation.referencesSondi I, Salopek-Sondi B. Silver nanoparticles as antimicrobial agent: a case study on E. coli as a model for Gram-negative bacteria. Journal of Colloid and Interface Science [Internet]. 2004 [cited 29 November 2017]; 275(1):177-182. Available from: https://www.sciencedirect.com/science/article/pii/S0021979704001638spa
dc.relation.referencesCenters for Disease Controls, ROC (Taiwan). Nosocomial Infections Surveillance System. Available from: https://www.cdc.gov.tw/english/info. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4451395/pdf/zcm603.pdfspa
dc.relation.referencesNatsis NE, Cohen PR. Coagulase-Negative Staphylococcus Skin and Soft Tissue Infections. Am J Clin Dermatol. 2018 Jun 7. Doi: 10.1007/s40257-018-0362-9.spa
dc.relation.referencesKim M, Zhao A, Wang A, Brown Z, Muir T, Stone H et al. Surface-attached molecules control Staphylococcus aureus quorum sensing and biofilm development. Nature Microbiology [Internet]. 2017 [cited 20 July 2017];2:17080. Available from: https://www.nature.com/articles/nmicrobiol201780spa
dc.relation.referencesBanerjee G, Ray AK. Quorum-sensing network-associated gene regulation in Gram-positive bacteria. Acta Microbiol Immunol Hung. 2017 Dec 1; 64(4):439-453. Doi: 10.1556/030.64.2017.040spa
dc.relation.referencesPaulander W, Varming AN, Bojer MS, Friberg C, Bæk K, Ingmer H. The agr quorum sensing system in Staphylococcus aureus cells mediates death of sub-population. BMC Res Notes. 2018 Jul 24;11(1):503. Doi: 10.1186/s13104-018-3600-6.spa
dc.relation.referencesKatherine Y. Le, Michael Otto. Quorum-sensing regulation in staphylococci—an overview. Front Microbiol. 2015; 6: 1174. Published online 2015 Oct 27. Doi: 10.3389/fmicb.2015.01174.spa
dc.relation.referencesTan L, Li S, Jiang B, Hu X, Li S. Therapeutic Targeting of the Staphylococcus aureus Accessory Gene Regulator (agr) System. Frontiers in Microbiology [Internet]. 2018 [cited 20 August 2018];9. Available from: https://www.ncbi.nlm.nih.gov/pubmed/29422887spa
dc.relation.referencesGeisinger E, Muir T, Novick R. agr receptor mutants reveal distinct modes of inhibition by staphylococcal autoinducing peptides. Proceedings of the National Academy of Sciences [Internet]. 2009 [cited 20 August 2018]; 106(4):1216-1221. Available from: http://www.pnas.org/content/pnas/early/2009/01/15/0807760106.fullspa
dc.relation.referencesThoendel M, Kavanaugh J, Flack C, Horswill A. Peptide Signaling in the Staphylococci. Chemical Reviews [Internet]. 2011 [cited 20 August 2018]; 111(1):117-151. Available from: https://www.ncbi.nlm.nih.gov/pubmed/21174435spa
dc.relation.referencesOtto M, Süßmuth R, Jung G, Götz F. Structure of the pheromone peptide of theStaphylococcus epidermidis agrsystem. FEBS Letters [Internet]. 1998 [cited 18 January 2018]; 424(1-2):89-94. Available from: https://febs.onlinelibrary.wiley.com/doi/epdf/10.1016/S0014-5793%2898%2900145-8spa
dc.relation.referencesSaenz HL, Augsburger V, Vuong C, Jack RW, Götz F, Otto M. Inducible expression and cellular location of AgrB, a protein involved in the maturation of the staphylococcal quorum-sensing pheromone. Arch Microbiol. 2000 Dec; 174(6):452-5.spa
dc.relation.referencesLinsheng Zhang, Guangyong Ji. Identification of a Staphylococcal AgrB Segment(s) Responsible for Group-Specific Processing of AgrD by Gene Swapping. J Bacteriol. 2004 Oct; 186(20): 6706–6713. Doi: 10.1128/JB.186.20.6706-6713.2004.spa
dc.relation.referencesSandeep K. Srivastava, Kalagiri Rajasree, Aneesa Fasim, Gayathri Arakere, Balasubramanian. Influence of the AgrC-AgrA Complex on the Response Time of Staphylococcus aureus Quorum Sensing. J Bacteriol. 2014 Aug; 196(15): 2876–2888. Doi: 10.1128/JB.01530-14.spa
dc.relation.referencesThoendel M, Horswill AR. Identification of Staphylococcus aureus AgrD residues required for autoinducing peptide biosynthesis. J Biol Chem. 2009 Aug 14;284(33):21828-38. Doi: 10.1074/jbc.M109.031757spa
dc.relation.referencesNovick RP1, Geisinger E. Quorum sensing in staphylococci. Send to Annu Rev Genet. 2008; 42:541-64. Doi: 10.1146/annurev.genet.42.110807.091640spa
dc.relation.referencesShurko JF, Galega RS, Li C, Lee GC. Evaluation of LL-37 antimicrobial peptide derivatives alone and in combination with vancomycin against S. aureus. J Antibiot (Tokyo). 2018 Aug 17. Doi: 10.1038/s41429-018-0090-7spa
dc.relation.referencesGökçınar NB, Karabulut AA, Onaran Z, Yumuşak E, Budak Yıldıran FA. Elevated Tear Human Neutrophil Peptides 1-3, Human Beta Defensin-2 Levels and Conjunctival Cathelicidin LL-37 Gene Expression in Ocular Rosacea. Ocul Immunol Inflamm. 2018 Aug 24:1-10. Doi: 10.1080/09273948.2018.1504971spa
dc.relation.referencesSancho-Vaello E. The Human Antimicrobial Peptides Dermcidin and LL-37 Show Novel Distinct Pathways in Membrane Interactions. Front Chem. 2017 Nov 7; 5:86. Doi: 10.3389/fchem.2017.00086spa
dc.relation.referencesPeerayeh S, Azimian A, Nejad Q, Kashi M. Prevalence of agr Specificity Groups AmongStaphylococcus aureusIsolates From University Hospitals in Tehran. Laboratory Medicine. 2009; 40(1):27-29.spa
dc.relation.referencesLi M. Genetic polymorphism of the accessory gene regulator (agr) locus in Staphylococcus epidermidis and its association with pathogenicity. Journal of Medical Microbiology. 2004; 53(6):545-549.spa
dc.relation.referencesChomczynski P, Sacchi N. The single-step method of RNA isolation by acid guanidinium thiocyanate–phenol–chloroform extraction: twenty-something years on. Nature Protocols [Internet]. 2006 [cited 25 April 2018]; 1(2):581-585. Available from: https://www.nature.com/articles/nprot.2006.83.spa
dc.relation.referencesPfaffl M. A new mathematical model for relative quantification in real-time RT-PCR. Nucleic Acids Research [Internet]. 2001 [cited 16 July 2018]; 29(9):45e-45. Available from: https://www.ncbi.nlm.nih.gov/pubmed/11328886spa
dc.relation.referencesAdhikari R, Arvidson S, Novick R. A Nonsense Mutation in agrA Accounts for the Defect in agr Expression and the Avirulence of Staphylococcus aureus 8325-4 traP::kan. Infection and Immunity [Internet]. 2007 [cited 6 April 2018];75(9):4534-4540. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1951176/spa
dc.relation.referencesTurkey A, Abed J, Suleiman A, Barzani K. Molecular assessment of accessory gene regulator (agr) quorum sensing system in biofilm forming Staphylococcus aureus and study of the effect of silver nanoparticles on agr system. Iran J Microbiol [Internet]. 2018 [cited 14 July 2018];10(1):14- 21. Available from: https://www.ncbi.nlm.nih.gov/pubmed/29922414spa
dc.relation.referencesChoudhary K, Mih N, Monk J, Kavvas E, Yurkovich J, Sakoulas G et al. The Staphylococcus aureus Two-Component System AgrAC Displays Four Distinct Genomic Arrangements That Delineate Genomic Virulence Factor Signatures. Frontiers in Microbiology [Internet]. 2018 [cited 29 September 2018]; 9. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5981134/pdf/fmicb-09-01082.pdfspa
dc.relation.referencesvan Leeuwen W, van Nieuwenhuizen W, Gijzen C, Verbrugh H, van Belkum A. Population Studies of Methicillin-Resistant and –Sensitive Staphylococcus aureus Strains Reveal a Lack of Variability in the agrD Gene, Encoding a Staphylococcal Autoinducer Peptide. Journal of Bacteriology [Internet]. 2000 [cited 1 August 2018]; 182(20):5721-5729. Available from: https://www.ncbi.nlm.nih.gov/pubmed/11004170spa
dc.relation.referencesjarraud S. Relationships between Staphylococcus aureus Genetic Background, Virulence Factors, agr Groups (Alleles), and Human Disease. Infection and Immunity [Internet]. 2002 [cited 3 January 2018]; 70(2):631-641. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC127674/pdf/0820.pdfspa
dc.rights.accessrightsinfo:eu-repo/semantics/closedAccessspa
dc.rights.creativecommonsAtribución-NoComercial-CompartirIgual 4.0 Internacional (CC BY-NC-SA 4.0)spa
dc.subject.proposalPéptidospa
dc.subject.proposalInvestigaciónspa
dc.subject.proposalQuorum sensingspa
dc.subject.proposalGenesspa
dc.subject.proposalEpidermidisspa
dc.subject.proposalAureusspa
dc.subject.proposalAgentes bactericidasspa
dc.type.coarhttp://purl.org/coar/resource_type/c_7a1fspa
dc.type.coarversionhttp://purl.org/coar/version/c_970fb48d4fbd8a85spa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/bachelorThesisspa
dc.type.redcolhttps://purl.org/redcol/resource_type/TPspa
dc.type.versioninfo:eu-repo/semantics/publishedVersionspa
dc.rights.coarhttp://purl.org/coar/access_right/c_14cbspa


Ficheros en el ítem

Thumbnail
Thumbnail
Thumbnail

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem

Derechos Reservados - Universidad Colegio Mayor de Cundinamarca, 2019
Excepto si se señala otra cosa, la licencia del ítem se describe como Derechos Reservados - Universidad Colegio Mayor de Cundinamarca, 2019