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Pneumococcus

Líneas de investigación

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.

Proyectos de investigación

Content with Investigacion Neumococos .

1: Título del proyecto: Desarrollo de enzibióticos para combatir infecciones en pacientes con fibrosis quística provocadas por los patógenos Pseudomonas aeruginosa y Staphylococcus aureus: CF-TREAT

Referencia: CPP2022-009574 / MPY 375/23

Agencia Financiadora: Agencia Estatal de Investigación. MICINN.

Fecha Inicio:    01/12/2023
Fecha Fin:    30/11/2026
Financiación: 238.938 Euros
Investigadores principales: Roberto Díez Martínez, José E. Yuste Lobo y Pilar García Suárez

 

2: Título del proyecto: Desarrollo de enzibióticos para combatir infecciones humanas producidas por Enterococcus faecium resistente a vancomicina (ANTI‐VRE).
Ayuda CPP2021-009054 financiada por Ministerio de Ciencia e Innovación

Investigadores principales: Roberto Díez Martínez, Jose Yuste Lobo y Mirian Domenech

Periodo: 18/11/2022 - 17/11/2025

Cuantía total: 231.455 €

3: Título del proyecto: Mecanismos de virulencia en patógenos respiratorios.
Entidad financiadora: Ministerio de Ciencia e Innovación, Agencia Estatal de Investigación (Convocatoria «Proyectos I+D+I» 2020 - Modalidades «Retos Investigación» y «Generación de Conocimiento»). Referencia: PID2020-119298RB-I00

Investigador principal: Jose Yuste Lobo

Periodo: 01/09/2021 - 30/08/2024

Cuantía total: 121.000 €

4: Título del proyecto: Efectividad de la vacuna antineumocócica conjugada 13-valente frente a la hospitalización por neumonía adquirida en la comunidad en adultos de 60 años o mayores, mediante un estudio de casos y controles modificado. Estudio CIBELES.

Investigadores principales: Jose Yuste Lobo y Ángel Gil de Miguel
Entidad financiadora: PFIZER. Referencia: MVP 249/20
Periodo: 23/02/2021 - 22/02/2025
Cuantía total: 168.000 €

5: Título del proyecto: Evolution of Invasive Pneumococcal Disease in Spain with special focus on the pathogenesis of serotypes 3, 8, 11A, 19A, 22F and 33F. Investigadores principales: Jose Yuste Lobo y Mirian Domenech.
Entidad financiadora: Merck Sharp & Dohme USA. Referencia: MVP 132/21
Período: 16/06/2021 - 15/12/2023
Cuantía total: 157.448€

6: Título del proyecto: Mecanismos de patogenicidad y protección en bacterias Gram-positivas causantes de enfermedad respiratoria y bacteriemia
Investigador principal: Jose Yuste Lobo
Entidad financiadora: MINECO. Referencia: SAF2017-83388-R
Periodo: 31/12/2017 - 30/06/2021
Cuantía total: 145.200 €

7: Título del proyecto: Characterization of susceptibility to cefditoren investigating penicillin resistant clinical isolates of Streptococcus pneumoniae.
Investigadores: Jose Yuste Lobo y Mirian Domenech Lucas
Entidad financiadora: Tedec Meiji Farma, S.A. Referencia: MVP 119/20
Periodo: 11/07/2020 – 10-07-2022
Cuantía total: 76.517 €

8: Título del proyecto: Impact of clinical isolates of serotypes 22F and 33F in the epidemiology and pathogenesis of Streptococcus pneumoniae.
Investigador principal: Jose Yuste Lobo
Entidad financiadora: Merck Sharp & Dohme España, S.A. Referencia: MVE 213/18
Periodo: 10/05/2018 - 30/05/2021
Cuantía total: 157.604 €

Publicaciones destacadas

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Characterization of broadly neutralizing antibody responses to HIV-1 in a cohort of long term non-progressors

Characterization of broadly neutralizing antibody responses to HIV-1 in a cohort of long term non-progressors. González N, McKee K, Lynch RM, Georgiev IS, Jimenez L, Grau E, Yuste E, Kwong PD, Mascola JR, Alcamí J. PLoS One. 2018;13:e0193773.

PUBMED DOI

Deep-Sequencing Analysis of the Dynamics of HIV-1 Quasiespecies in Naive Patients during a Short Exposure to Maraviroc

Deep-Sequencing Analysis of the Dynamics of HIV-1 Quasiespecies in Naive Patients during a Short Exposure to Maraviroc. Cascajero A, Rastrojo A, Díez-Fuertes F, Hernández-Novoa B, Aguado B, Moreno S, Alcami J, Pérez-Olmeda M. J Virol. 2018;92. pii: e00390-18.

PUBMED DOI

Evaluation of resistance to HIV-1 infection ex vivo of PBMCs isolated from patients with chronic myeloid leukemia treated with different tyrosine kinase inhibitors.

Evaluation of resistance to HIV-1 infection ex vivo of PBMCs isolated from patients with chronic myeloid leukemia treated with different tyrosine kinase inhibitors. Bermejo M, Ambrosioni J, Bautista G, Climent N, Mateos E, Rovira C, Rodríguez-Mora S, López-Huertas MR, García-Gutiérrez V, Steegmann JL, Duarte R, Cervantes F, Plana M, Miró JM, Alcamí J, Coiras M. Biochem Pharmacol. 2018;156:248-264.

PUBMED DOI

Diverse large HIV-1 non-subtype B clusters are spreading among men who have sex with men in Spain

Delgado E, Benito S, Montero V, Cuevas MT, Fernández-García A, Sánchez-Martínez M, García-Bodas E, Díez-Fuertes F, Gil H, Cañada J, Carrera C, Martínez-López J, Sintes M, Pérez-Álvarez L, Thomson MM; Spanish Group for the Study of New HIV Diagnoses. Diverse large HIV-1 non-subtype B clusters are spreading among men who have sex with men in Spain. Front Microbiol. 2019; 3;10:655.

PUBMED DOI

Improvement of HIV-1 coreceptor tropism prediction by employing selected nucleotide positions of the env gene in a Bayesian network classifier.

Díez-Fuertes F, Delgado E, Vega Y, Fernández-García A, Cuevas MT, Pinilla M, García V, Pérez-Álvarez L, Thomson MM. Improvement of HIV-1 coreceptor tropism prediction by employing selected nucleotide positions of the env gene in a Bayesian network classifier. J Antimicrob Chemother. 2013; 68:1471-1485.

PUBMED DOI

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

Identification of an HIV-1 BG intersubtype recombinant form (CRF73_BG), partially related to CRF14_BG, which Is circulating in Portugal and Spain.

Fernández-García A, Delgado E, Cuevas MT, Vega Y, Montero V, Sánchez M, Carrera C, López-Álvarez MJ, Miralles C, Pérez-Castro S, Cilla G, Hinojosa C, Pérez-Álvarez L, Thomson MM. Identification of an HIV-1 BG intersubtype recombinant form (CRF73_BG), partially related to CRF14_BG, which Is circulating in Portugal and Spain. PLoS One. 2016; 11:e0148549.

PUBMED DOI

Sequence analysis of in vivo-expressed HIV-1 spliced RNAs reveals the usage of new and unusual splice sites by viruses of different subtypes

Vega Y, Delgado E, de la Barrera J, Carrera C, Zaballos Á, Cuesta I, Mariño A, Ocampo A, Miralles C, Pérez-Castro S, Álvarez H, López-Miragaya I, García-Bodas E, Díez-Fuertes F, Thomson MM. Sequence analysis of in vivo-expressed HIV-1 spliced RNAs reveals the usage of new and unusual splice sites by viruses of different subtypes. PLoS One. 2016; 11:e0158525.

PUBMED DOI

HIV-1 genetic diversity in recently diagnosed infections in Moscow: predominance of AFSU, frequent branching in clusters, and circulation of the Iberian subtype G variant.

Karamov E, Epremyan K, Siniavin A, Zhernov Y, Cuevas MT, Delgado E, Sánchez-Martínez M, Carrera C, Kornilaeva G, Turgiev A, Bacqué J, Pérez-Álvarez L, Thomson MM. HIV-1 genetic diversity in recently diagnosed infections in Moscow: predominance of AFSU, frequent branching in clusters, and circulation of the Iberian subtype G variant. AIDS Res Hum Retroviruses. 2018; 34:629-634.

PUBMED DOI

Bayesian phylogeographic analyses clarify the origin of the HIV-1 subtype A variant circulating in former Soviet Union's countries.

Díez-Fuertes F, Cabello M, Thomson MM. Bayesian phylogeographic analyses clarify the origin of the HIV-1 subtype A variant circulating in former Soviet Union's countries. Infect Genet Evol. 2015; 33:197-205.

PUBMED DOI

Viruses from a cluster of HIV-1 Elite controllers inherit viral characteristics associated with the clinical non-progressor phenotype.

Casado C, Marrero-Hernández S, Márquez-Arce D, Pernas M, Marfil S, Borràs-Grañana F, Olivares I, Cabrera-Rodríguez R, Valera M-S, de Armas-Rillo L, Lemey P, Blanco J, Valenzuela-Fernández A, Lopez-Galíndez C. 2018. Viral characteristics associated with the clinical nonprogressor phenotype are inherited by viruses from a cluster of HIV-1 elite controllers. mBio 9:e02338-17.

PUBMED DOI

Factors Leading to the Loss of Natural Elite Control of HIV-1 Infection.

María Pernas, Laura Tarancón-Diez, Esther Rodríguez-Gallego, Josep Gómez, Julia G. Prado, Concepción Casado, Beatriz Dominguez-Molina, Isabel Olivares, Maite Coiras, Agathe León, Carmen Rodriguez, Jose Miguel Benito, Norma Rallón, Montserrat Plana, Onofre Martinez-Madrid, Marta Dapena, Jose Antonio Iribarren, Jorge del Romero, Felipe García, José Alcamí, Mª Ángeles Muñoz-Fernández, Francisco Vidal, Manuel Leal, Cecilio Lopez-Galindeza, Ezequiel Ruiz-Mateos. On behalf of ECRIS integrated in the Spanish AIDS Research Network. (2018). Factors Leading to the Loss of Natural Elite Control of HIV-1 Infection. J.Virol. 92, 5 e01805-17.

PUBMED DOI

Human Immunodeficiency Virus Type 1 2-LTR circles: a subject for debate

Isabel Olivares, María Pernas, Concepción Casado and Cecilio López-Galíndez. Human Immunodeficiency Virus Type 1 2-LTR circles: a subject for debate. (2016). AIDS review, 18: 23-31.

PUBMED DOI

Improved antibody cross-neutralizing activity in HIV-1 dual double infected LTNP patients.

María Pernas, Concepción Casado, Victor Sanchez-Merino, Alberto Merino-Mansilla, Isabel Olivares, Eloisa Yuste, Cecilio Lopez-Galindez. Improved antibody cross-neutralizing activity in HIV-1 dual double infected LTNP patients. (2015) PLoS One. Aug 10; 10 (8):e0134054. doi: 10.1371/journal.pone.0134054. eCollection.

PUBMED DOI

Influence of Mutation and Recombination on HIV-1 in vitro Fitness Recovery.

Ramón Lorenzo-Redondo, Miguel Arenas, and Cecilio Lopez-Galindez. Influence of Mutation and Recombination on HIV-1 in vitro Fitness Recovery. (2015) Mol Phylogenet Evol. Sep 7. pii: S1055-7903(15)00259-6. doi: 10.1016/j.ympev.2015.09.001. PMID: 26358613

PUBMED DOI

Analysis of HIV-1 “in vitro” evolution through 3D real fitness landscapes constructed by Self Organizing Maps.

Ramón Lorenzo‐Redondo, Soledad Delgado, Federico Morán, and Cecilio Lopez‐Galindez. Analysis of HIV-1 “in vitro” evolution through 3D real fitness landscapes constructed by Self Organizing Maps. (2014) PLoS One. 9(2): e88579.

PUBMED DOI

Identification of a Spanish HIV-1 Long Term Non-Progressor cluster infected with a low replicating virus.

Concepción Casado, Maria Pernas, Virginia Sandonis, Tamara Alvaro-Cifuentes, Isabel Olivares, Rosa Fuentes, Lorena Martínez Prats, Eulalia Grau, Lidia Ruiz, Rafael Delgado, Carmen Rodríguez, Jorge del Romero, and Cecilio López-Galíndez. Identification of a Spanish HIV-1 Long Term Non-Progressor cluster infected with a low replicating virus. (2013). PLoS One. 8 (10):e77663.

PUBMED DOI

Content with Investigacion Neumococos .

List of staff

Información adicional

The Pneumococcus Unit is in charge of two very important aspects related to pneumococcus infections, such as epidemiological surveillance and basic and translational research of diseases caused by this pathogen. Our unit contributes to the epidemiological surveillance of invasive pneumococcal disease (IPD), characterizing the serotypes and genotypes of invasive pneumococci circulating in Spain, as well as the evolution of antibiotic resistance in this pathogen. 

Identification of culture-negative samples (CSF and pleural fluids) is performed using real-time PCR. Serotyping is performed using the Dot-blot and PCR-sequencing technique. Genotyping for the study of outbreaks and characterization of clones associated with hypervirulent and/or multiresistant strains is performed using the MLST technique and the analysis of complete genomes by massive sequencing. In addition, antibiotic susceptibility is determined following the EUCAST criteria. 

Our unit belongs to the IBD-labnet network of the ECDC and annually notifies all cases of IPD to the ECDC and also to the IRIS (Invasive Respiratory Infection Surveillance) network. At the level of basic and translational research, our unit is responsible for studying and characterizing different molecular mechanisms of pathogenicity and protection related to pneumococcal infection. Among the main objectives are the molecular characterization of virulence factors, the study of different vaccine candidate proteins and determining the possible impact that tobacco smoke and the formation of biofilms have on the colonization of the respiratory tract.

The Pneumococcus Unit is in charge of two very important aspects related to pneumococcus infections, such as epidemiological surveillance and basic and translational research of diseases caused by this pathogen. Our unit contributes to the epidemiological surveillance of invasive pneumococcal disease (IPD), characterizing the serotypes and genotypes of invasive pneumococci circulating in Spain, as well as the evolution of antibiotic resistance in this pathogen. 

Identification of culture-negative samples (CSF and pleural fluids) is performed using real-time PCR. Serotyping is performed using the Dot-blot and PCR-sequencing technique. Genotyping for the study of outbreaks and characterization of clones associated with hypervirulent and/or multiresistant strains is performed using the MLST technique and the analysis of complete genomes by massive sequencing. In addition, antibiotic susceptibility is determined following the EUCAST criteria. 

Our unit belongs to the IBD-labnet network of the ECDC and annually notifies all cases of IPD to the ECDC and also to the IRIS (Invasive Respiratory Infection Surveillance) network. At the level of basic and translational research, our unit is responsible for studying and characterizing different molecular mechanisms of pathogenicity and protection related to pneumococcal infection. Among the main objectives are the molecular characterization of virulence factors, the study of different vaccine candidate proteins and determining the possible impact that tobacco smoke and the formation of biofilms have on the colonization of the respiratory tract.

Content with Investigacion Neumococos .

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