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Content with Investigacion Neumococos .

Neumococos

Vigilancia epidemiológica de los serotipos y genotipos que causan enfermedad neumocócica invasiva (ENI) en España. Caracterización molecular de factores de virulencia de neumococo. Identificación y caracterización de proteínas de neumococo candidatas a vacuna. Evaluación de mecanismos de evasión de la respuesta inmune en Streptococcus pneumoniae. Impacto de los biofilms bacterianos en la persistencia del tracto respiratorio. Mecanismos de cronicidad de aislados clínicos de neumococo en pacientes con enfermedad pulmonar obstructiva crónica.

Research projects

Content with Investigacion Caracterización molecular de los estafilococcus .

  En el Laboratorio de I.R.A.S., también denominado de "Infecciones Intrahospitalarias", nos centramos actualmente en la caracterización molecular de los estafilococos, tanto S. aureus, como coagulasa negativos.

   Los marcadores moleculares habituales, en el caso de los S. aureus son: electroforesis en campo pulsado (PFGE), tipificación multilocus de secuencias (MLST), tipo de casete cromosómico estafilocócico (SSCmec), tipificación spa, También detectamos, entre otros, los genes mec y PVL, los genes que codifican la Toxina exfoliativa (SST) y la Toxina del Shock Tóxico. Asimismo, para la identificación de los estafilococos coagulasa negativos, secuenciamos los genes 16S, rpoBtuf., a los que también aplicamos PFGE, SSCmec, MLST.

   Nuestras líneas de investigación se centran, por un lado, en el estudio de los mecanismos de resistencia a las oxazolidinonas: gen cfr, dominio del gen 23S ARNr , gen rplC (riboproteína L3), gen rplD (riboproteína L4), gen rplV (riboproteína L22). Hemos detectado, por primera vez, la existencia de nuevas mutaciones en la riboproteína L4 en un paciente con fibrosis quística. Aparte de los estudios llevados a cabo de las resistencias al linezolid en distintos hospitales, estudiamos en colaboración con la  Universidad de Tsukuba (Japón) y la Universidad Europea la prevalencia del plásmido pSCFS7 entre cepas cfr positivas de distintos hospitales españoles.

   Por otra parte, participamos en estudios multicéntricos (2002-2014) para conocer mejor el estado de la población estafilocócica española, centrándonos fundamentalmente en las cepas de S. aureus resistentes a meticilina (SARM); dado que es un importante patógeno humano que causa una amplia variedad de infecciones que pueden ser leves, como  algunas infecciones de piel y partes blandas, o graves, como bacteriemia, endocarditis, neumonía e infecciones de localización quirúrgica. Además, pueden producir una colonización asintomática, lo que facilita su transmisión y diseminación. Desde su descripción  inicial en 1959 y durante varias décadas, el SARM se había considerado un patógeno confinado al ámbito sanitario, pero a partir de la década de los noventa, se describe la emergencia de cepas SARM responsables de infecciones aparentemente adquiridas en la comunidad.

Dentro de esta línea estamos colaborando en el proyecto: "Colonización por S. aureus resistente a la meticilina en niños sanos de la comunidad (estudio C.O.S.A.C.O.)", que es un estudio multicéntrico de ámbito nacional.

También colaboramos con otros laboratorios en distintos estudios, como: "Mecanismos de patogenicidad y protección en bacterias Gram positivas causantes de enfermedades respiratorias y bacteriemia". 

Publications

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Predominance of CXCR4 tropism in HIV-1 CRF14_BG strains from newly diagnosed infections.

Pérez-Álvarez L, Delgado E, Vega Y, Montero V, Cuevas T, Fernández-García A, García-Riart B, Pérez-Castro S, Rodríguez-Real R, López-Álvarez MJ, Fernández-Rodríguez R, Lezaun MJ, Ordóñez P, Ramos C, Bereciartua E, Calleja S, Sánchez-García AM, Thomson MM. Predominance of CXCR4 tropism in HIV-1 CRF14_BG strains from newly diagnosed infections. J Antimicrob Chemother. 2014; 69:246-253.

PUBMED DOI

Molecular epidemiology, phylogeny, and phylodynamics of CRF63_02A1, a recently originated HIV-1 circulating recombinant form spreading in Siberia.

Shcherbakova NS, Shalamova LA, Delgado E, Fernández-García A, Vega Y, Karpenko LI, Ilyichev AA, Sokolov YV, Shcherbakov DN, Pérez-Álvarez L, Thomson MM. Molecular epidemiology, phylogeny, and phylodynamics of CRF63_02A1, a recently originated HIV-1 circulating recombinant form spreading in Siberia. AIDS Res Hum Retroviruses. 2014; 30:912-919.

PUBMED DOI

Epidemiological surveillance of HIV-1 transmitted drug resistance in Spain in 2004-2012: relevance of transmission clusters in the propagation of resistance mutations.

Vega Y, Delgado E, Fernández-García A, Cuevas MT, Thomson MM, Montero V, Sánchez M, Sánchez AM, Pérez-Álvarez L; Spanish Group for the Study of New HIV-1 Diagnoses in Galicia and Basque Country. Epidemiological surveillance of HIV-1 transmitted drug resistance in Spain in 2004-2012: relevance of transmission clusters in the propagation of resistance mutations. PLoS One. 2015; 10:e0125699.

PUBMED DOI

Phylogeny and phylogeography of a recent HIV-1 subtype F outbreak among men who have sex with men in Spain deriving from a cluster with a wide geographic circulation in Western Europe.

Delgado E, Cuevas MT, Domínguez F, Vega Y, Cabello M, Fernández-García A, Pérez-Losada M, Castro MÁ, Montero V, Sánchez M, Mariño A, Álvarez H, Ordóñez P, Ocampo A, Miralles C, Pérez-Castro S, López-Álvarez MJ, Rodríguez R, Trigo M, Diz-Arén J, Hinojosa C, Bachiller P, Hernáez-Crespo S, Cisterna R, Garduño E, Pérez-Álvarez L, Thomson MM. Phylogeny and phylogeography of a recent HIV-1 subtype F outbreak among men who have sex with men in Spain deriving from a cluster with a wide geographic circulation in Western Europe. PLoS One. 2015; 10:e0143325.

PUBMED DOI

Content with Investigacion Caracterización molecular de los estafilococcus .

List of staff

Additional Information

Our group is interested in the mechanisms of generation of hematopoietic cells throughout ontogeny and the influence that the first hematopoietic cells, belonging to the innate/pseudoinnate immune system, exert on the adaptive immune system in the adult individual. Our lines of research include the analysis of pseudoinnate lymphoid populations, which connect the innate and adaptive immune systems, and whose origin is in progenitors of early ontogeny. We are trying to understand its role in the immune response through TLR receptors (“Toll-like receptors”) throughout life, particularly in animal models of bacterial infection, with the aim of designing new vaccine therapies. We analyze immune diversity in animal models and in human samples of children and elderly people diagnosed with respiratory disease, by: a) analyzing the lymphoid subpopulations of the local response. b) the study of the genetic rearrangements of the immunoglobulins that are produced. c) the systemic effector response and in peripheral organs. These approaches, carried out both in the mouse model and in human samples, will facilitate the design of more effective therapies and the characterization of biomarkers, adapted to the pediatric and elderly population, useful for the health field and technological innovation.rupo está interesado en los mecanismos de generación de células hematopoyéticas a lo largo de la ontogenia y la influencia que las primeras células hematopoyéticas, pertenecientes al sistema inmune innato/pseudoinnato, ejercen sobre el sistema inmune adaptativo en el individuo adulto. Nuestras líneas de investigación incluyen el análisis de poblaciones linfoides pseudoinnatas, que conectan el sistema inmune innato y adaptativo, y cuyo origen está en progenitores de la ontogenia temprana. Intentamos entender su papel en la respuesta inmune a través de receptores TLR (“Toll-like receptors”) a lo largo de la vida, en particular en modelos animales de infección bacteriana, con objeto de diseñar nuevas terapias vacunales. Analizamos la diversidad inmune en modelos animales y en muestras humanas de niños y ancianos diagnosticados de enfermedad respiratoria, mediante: a) el análisis de las subpoblaciones linfoides de la respuesta local. b) el estudio de los reordenamientos genéticos de las inmunoglobulinas que se producen. c) la respuesta efectora sistémica y en órganos periféricos. Estas aproximaciones, realizadas tanto en el modelo de ratón como en muestras humanas, facilitarán el diseño de terapias más eficaces y la caracterización de biomarcadores, adaptados a la población infantil y envejecida, de utilidad para el ámbito sanitario y de innovación tecnológica.

Doctoral theses

“Expression and functionality of tlr2 and tlr4 in lymphomyeloid populations present in the lung and lymphoid organs during embryonic and neonatal life in mouse models.”  Carolina Ruiz Sánchez. Complutense University of Madrid, 2022

Master's thesis

Detection and characterization of extracellular vesicles of platelet origin in lung supernatants from SPN-infected animals. Marta Paris, Alcalá University, 2024

Study of TLR-dependent activation in the RAW 264.7 macrophage line. Iñigo Merino de Saracho, Alcalá University, 2023

Study of the functionality of TLR receptors in the lung and other lymphoid organs in B cell populations using the neonatal mouse model. Yolanda Campanero, Alcalá University, 2023

Exploratory study of T lymphoid progenitors in the neonatal mouse lung. Alejandro Arrabal, Complutense University of Madrid, 2022

Study of B lymphoid differentiation in mice deficient for CD5 and CD6 molecules. Cristina Martín, Alcalá University, 2022

Role of platelets and their progenitor cells in two animal models of infection: SPN and RSV. Ana de Lucas Rius, Alcalá University, 2020

Pilot study of RSV infection in the mouse model: cellular phenotype of myeloid and lymphoid populations in the lung in two animal models of infection: SPN and RSV. Juan Antonio Martín Quesada, Alcalá University, 2020

B cell response during Streptococcus pneumoniae infection. Eva Castro, 2020

Study of the hematopoietic potential of neonatal lung cells in the mouse model. Ana Cogollo García, Alcalá University, 2018

Innate immune response to S. pneumoniae in the lung. Rodrigo Sánchez, Complutense University of Madrid, 2018

Neonatal immunity in the mouse model: localization and function of the innate and adaptive response. Alba Ezequiel Fernández, Alcalá University, 2017

Characterization of immunoglobulin gene diversity in the mouse model of TLR4 homeostasis and activation by bacterial lipopolysaccharide. Cristina García Caballero, Alcalá University, 2017

Altered lymphopoiesis and splenic B cell subsets on Telomerase Activity Deficient Mice (TERC-/-). Juliana Manosalva, Complutense University of Madrid, 2017

Study of the Immune Response in Nasopharyngeal Washings of Infants with Bronchiolitis. Isabel Martín Barrios, Complutense University of Madrid, 2016

Dynamics of B1-REL lymphocytes in the in vivo immunization model with DNP-LPS. Inmaculada Sanz Ramos University Alcalá, 2015

Megakaryocyte differentiation pathways in the mouse model. Marta Cobos Briz, Alcalá University, 2015

Role of megakaryocytes in infectious processes. Melania Guerrero Hue, Complutense University of Madrid, 2015

 

Final degree projects

Study of new bacterial vaccines in the mouse (Mus musculus) infection model due to Streptococcus pneumoniae. Alejandro Arrabal, Polytechnic University of Madrid, 2021

Megakaryocytes and platelets in SPN respiratory infection: Role of TLR4. Óscar González Hervás, Complutense University of Madrid, 2021

Study of the immune response mediated by pseudo-innate B lymphocytes against TLR4-dependent immunization models. Rodrigo Sánchez, Complutense University of Madrid, 2017.

Study of the diversity in the immunoglobulin repertoire in healthy individuals. Isabel Martín, Francisco de Vitoria University, 2015.

Dynamics of hematopoietic populations in the perinatal spleen. Inmaculada Sanz, Alcalá University, 2014

Teaching in training courses

Training course: Introduction to Flow Cytometry (from 2015 to present)
Training Course: Flow Cytometry Data Analysis (2018 to present)

Outreach / Citizen Science

• Collaboration in the 4th+Company CAM program.

• Collaboration with the ISCIII Scientific Culture Unit in Science Week at the ISCIII

• Scientific Dissemination Project "Talking about Science", carried out in Majadahonda primary, secondary and high school schools, since 2015 in collaboration with the Department of Education and Youth of the Majadahonda City Council: “How your Immune System works and healthy lifestyle habits to take care of it”

Doctoral theses

“Expression and functionality of tlr2 and tlr4 in lymphomyeloid populations present in the lung and lymphoid organs during embryonic and neonatal life in mouse models.”  Carolina Ruiz Sánchez. Complutense University of Madrid, 2022

Master's thesis

Detection and characterization of extracellular vesicles of platelet origin in lung supernatants from SPN-infected animals. Marta Paris, Alcalá University, 2024

Study of TLR-dependent activation in the RAW 264.7 macrophage line. Iñigo Merino de Saracho, Alcalá University, 2023

Study of the functionality of TLR receptors in the lung and other lymphoid organs in B cell populations using the neonatal mouse model. Yolanda Campanero, Alcalá University, 2023

Exploratory study of T lymphoid progenitors in the neonatal mouse lung. Alejandro Arrabal, Complutense University of Madrid, 2022

Study of B lymphoid differentiation in mice deficient for CD5 and CD6 molecules. Cristina Martín, Alcalá University, 2022

Role of platelets and their progenitor cells in two animal models of infection: SPN and RSV. Ana de Lucas Rius, Alcalá University, 2020

Pilot study of RSV infection in the mouse model: cellular phenotype of myeloid and lymphoid populations in the lung in two animal models of infection: SPN and RSV. Juan Antonio Martín Quesada, Alcalá University, 2020

B cell response during Streptococcus pneumoniae infection. Eva Castro, 2020

Study of the hematopoietic potential of neonatal lung cells in the mouse model. Ana Cogollo García, Alcalá University, 2018

Innate immune response to S. pneumoniae in the lung. Rodrigo Sánchez, Complutense University of Madrid, 2018

Neonatal immunity in the mouse model: localization and function of the innate and adaptive response. Alba Ezequiel Fernández, Alcalá University, 2017

Characterization of immunoglobulin gene diversity in the mouse model of TLR4 homeostasis and activation by bacterial lipopolysaccharide. Cristina García Caballero, Alcalá University, 2017

Altered lymphopoiesis and splenic B cell subsets on Telomerase Activity Deficient Mice (TERC-/-). Juliana Manosalva, Complutense University of Madrid, 2017

Study of the Immune Response in Nasopharyngeal Washings of Infants with Bronchiolitis. Isabel Martín Barrios, Complutense University of Madrid, 2016

Dynamics of B1-REL lymphocytes in the in vivo immunization model with DNP-LPS. Inmaculada Sanz Ramos University Alcalá, 2015

Megakaryocyte differentiation pathways in the mouse model. Marta Cobos Briz, Alcalá University, 2015

Role of megakaryocytes in infectious processes. Melania Guerrero Hue, Complutense University of Madrid, 2015

 

Final degree projects

Study of new bacterial vaccines in the mouse (Mus musculus) infection model due to Streptococcus pneumoniae. Alejandro Arrabal, Polytechnic University of Madrid, 2021

Megakaryocytes and platelets in SPN respiratory infection: Role of TLR4. Óscar González Hervás, Complutense University of Madrid, 2021

Study of the immune response mediated by pseudo-innate B lymphocytes against TLR4-dependent immunization models. Rodrigo Sánchez, Complutense University of Madrid, 2017.

Study of the diversity in the immunoglobulin repertoire in healthy individuals. Isabel Martín, Francisco de Vitoria University, 2015.

Dynamics of hematopoietic populations in the perinatal spleen. Inmaculada Sanz, Alcalá University, 2014

Teaching in training courses

Training course: Introduction to Flow Cytometry (from 2015 to present)
Training Course: Flow Cytometry Data Analysis (2018 to present)

Outreach / Citizen Science

• Collaboration in the 4th+Company CAM program.

• Collaboration with the ISCIII Scientific Culture Unit in Science Week at the ISCIII

• Scientific Dissemination Project "Talking about Science", carried out in Majadahonda primary, secondary and high school schools, since 2015 in collaboration with the Department of Education and Youth of the Majadahonda City Council: “How your Immune System works and healthy lifestyle habits to take care of it”

Content with Investigacion Caracterización molecular de los estafilococcus .