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Investigation

Pneumococcus

Research Lines

Content with Investigacion Inmunopatología del SIDA .

Research Lines:

1.    Molecular mechanisms associated to the protection of HIV-1 infection in limb-girdle muscular dystrophy dominant D2 (LGMDD2) patients.
2.    Generation of neutralizing antibodies for therapeutic use based on the broad-spectrum neutralizing response against founder viruses.
3.    Characterization of the immune memory against SARS-CoV-2 in a population over 65 years of age.
4.    Screening and characterization of new anti-latency drugs against HIV-1.
5.    Study of viral entry and HIV tropism in viruses of special epidemiological relevance in Spain. 
6.    Genetic mechanisms of protection and control of HIV-1 infection in populations with extreme phenotypes.

Clinical studies:

1.    Phase 1 clinical trial to evaluate the safety and immunogenicity of HIV-1 envelope-based 763SIP8/MPLA-5 vaccine as a preventive vaccine in healthy uninfected adults. 
2.    ENE-COVID-Senior: Prospective observational study in a cohort of elderly nursing home residents to establish their immune status after receiving a complete vaccination regimen.

Implementation of new technologies:

1.    Identification of HIV-1 integration sites by deep sequencing.
2.    Single cell transcriptomics with simultaneous TCR/BCR sequencing.
3.    Epidemiological intelligence for prediction of SARS-CoV-2 variants likely to emerge in different vaccination settings.
 

Research projects

Content with Investigacion Inmunopatología del SIDA .

1.    Immune response to SARS-CoV-2 infection: effect in naïve vaccinees and seropositives against the most transmissible variants and relevance of host genetics.
Principal Investigator: Javier García Pérez. 
Funding Agency: Acción Estratégica en Salud Intramural 2021(ISCIII)
Funding: 135.000 €
Duration: 2022-2025. 
Project Reference: PI21CIII/00025.
2.    Design and generation of viral stocks of new SARS-CoV-2 variants (omicron subvariants) and analysis of their susceptibility to antibodies neutralization.
Principal Investigator: Javier García Pérez.
Funding Agency: Hipra Scientific S.L.U.
Funding: 103.771 €
Duration: 2023-2025.
Project Reference: MVP 198/23.
3.    Characterization of a mutation in transportin 3 that protects against HIV infection: molecular mechanisms and discovery of new drugs.
Principal Investigator: José Alcamí y Javier García Pérez.
Funding Agency:     Proyectos de I+D+I, Generación de Conocimiento y Retos Investigación de la Agencia Estatal de Investigación.
Funding: 240.000 €
Duration: 2022-2026. 
Project Reference: PID2021-125978OB-C21 funded by MICIU/AEI/10.13039/501100011033 and by FEDER, UE

4.    Generation of immunogens based on HIV-1 envelopes from acutely infected individuals with a broad neutralizing response against founder viruses.
Principal investigator: Nuria González Fernández.
Funding Agency: Acción Estratégica en Salud Intramural 2023 (ISCIII)
Funding: 82.000 €
Duration: 2024-2026. 
Project Reference: PI23CIII/00039.
5.    Phase 1 clinical trial to evaluate the safety and immunogenicity of HIV-1 envelope-based 763SIP8/MPLA-5 vaccine. 
Principal Investigator: Josep Mallolas Masferrer.
Funding Agency: Proyectos de Investigación Clínica Independiente, Acción Estratégica en Salud 2021-2023 (ISCIII).
Funding: 173.200 €
Duration: 2024-2026. 
Project Reference: ICI23/00025.
6.    Service of immunological determinations of the ENE-COVID SENIOR II protocol.
Principal Investigator: Mayte Pérez Olmeda y Javier García Pérez. 
Funding Agency: Fundación para la investigación biomédica del Hospital Universitario La Paz
Funding: 185.037 €
Duration: 2024-2025. 
Project Reference: MOTR 219/24.
7.    Characterization of the immune memory against SARS-CoV-2 in a population over 65 years of age using single cell transcriptomics.
Principal Investigator: Javier García Pérez y Francisco Díez Fuertes.
Funding Agency: Acción Estratégica en Salud Intramural 2021(ISCIII)
Funding: 152.000 €
Duration: 2025-2027. 
Project Reference: PI24CIII/00058
8. Evaluation of rimonabant and cannbinooid analogues in HIV infection and viral latency.
Principal Investigator: Luis Miguel Bedoya del Olmo. 
Funding Agency: Universidad Complutense de Madrid
Funding: 12.000 €
Duration: 2024-2025. 
Project Reference: PR12/24-31553.
9. Discovery of new inhibitors of HIV-1 RNA biogenesis based on blocking the ribonucleoprotein RRE-Rev.
Principal Investigator: José Gallego Sala. Associate Researcher: Luis Miguel Bedoya del Olmo
Funding Agency: Department of Innovation, Universities, Science and Digital Society. Generalitat Valenciana.
Funding: 543,683.84 €
Duration: 2025-2027. 
Project Reference: PROMETEO/2021/036.

Publications

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Immunogenicity of the Conjugate Meningococcal ACWY-TT Vaccine in Children and Adolescents Living with HIV

Berzosa A, Guillen S, Epalza C, Escosa L, Navarro ML, Prieto LM, Sainz T, de Ory SJ, Montes M, Abad R, Vázquez JA, García IS, Ramos-Amador JT. Microorganisms. 2023 Dec 23;12(1):30

PUBMED DOI

Outbreak of invasive meningococcal disease caused by a meningococcus serogroup B expressing a rare porA genosubtype (19-54, 15), Spain, March to April 2024.

Abad R, Navarro C, García-Amil C, Montes M, Castañeda-García A, Cuadros JA, Galar A, Martin F, Mena E, Pérez de Madrid S, Román C, Soler M, Vázquez JA. Euro Surveill. 2025 Nov;30(44):2500222

PUBMED DOI

Trends in invasive bacterial diseases during the first 2 years of the COVID-19 pandemic: analyses of prospective surveillance data from 30 countries and territories in the IRIS Consortium

Shaw D, Abad R, Amin-Chowdhury Z, Bautista A, Bennett D, Broughton K, Cao B, Casanova C, Choi EH, Chu YW, Claus H, Coelho J, Corcoran M, Cottrell S, Cunney R, Cuypers L, Dalby T, Davies H, de Gouveia L, Deghmane AE, Demczuk W, Desmet S, Domenech M, Drew R, du Plessis M, Duarte C, Erlendsdóttir H, Fry NK, Fuursted K, Hale T, Henares D, Henriques-Normark B, Hilty M, Hoffmann S, Humphreys H, Ip M, Jacobsson S, Johnson C, Johnston J, Jolley KA, Kawabata A, Kozakova J, Kristinsson KG, Krizova P, Kuch A, Ladhani S, Lâm TT, León ME, Lindholm L, Litt D, Maiden MCJ, Martin I, Martiny D, Mattheus W, McCarthy ND, Meehan M, Meiring S, Mölling P, Morfeldt E, Morgan J, Mulhall R, Muñoz-Almagro C, Murdoch D, Murphy J, Musilek M, Mzabi A, Novakova L, Oftadeh S, Perez-Argüello A, Pérez-Vázquez M, Perrin M, Perry M, Prevost B, Roberts M, Rokney A, Ron M, Sanabria OM, Scott KJ, Sheppard C, Siira L, Sintchenko V, Skoczyńska A, Sloan M, Slotved HC, Smith AJ, Steens A, Taha MK, Toropainen M, Tzanakaki G, Vainio A, van der Linden MPG, van Sorge NM, Varon E, Vohrnova S, von Gottberg A, Yuste J, Zanella R, Zhou F, Brueggemann AB. Lancet Digit Health. 2023 Sep;5(9):e582-e593.

PUBMED DOI

Meningococcal carriage in men who have sex with men presenting at a sexual health unit in Spain

Pérez-González A, Carballo R, Araújo-Ameijeiras A, Abad R, Navarro C, Ocampo A, Poveda E, Potel C. Eur J Clin Microbiol Infect Dis. 2023 Mar;42(3):287-296

PUBMED DOI

Effectiveness of a Meningococcal Group B Vaccine (4CMenB) in Children

Castilla J, García Cenoz M, Abad R, Sánchez-Cambronero L, Lorusso N, Izquierdo C, Cañellas Llabrés S, Roig J, Malvar A, González Carril F, Boone ALD, Pérez Martín J, Rodríguez Recio MJ, Galmés A, Caballero A, García Rojas A, Juanas F, Nieto M, Viloria Raymundo LJ, Martínez Ochoa E, Rivas AI, Castrillejo D, Moreno Pérez D, Martínez A, Borràs E, Sánchez Gómez A, Pastor E, Nartallo V, Arteagoitia JM, Álvarez-Fernández B, García Pina R, Fernández Arribas S, Vanrell J, García Hernández S, Mendoza RM, Méndez M, López-Tercero MM, Fernández-Rodríguez Á, Blanco Á, Carrillo de Albornoz FJ, Ruiz Olivares J, Ruiz-Montero R, Limia A, Navarro-Alonso JA, Vázquez JA, Barricarte A. N Engl J Med. 2023 Feb 2;388(5):427-438

PUBMED DOI

Listeriosis outbreak caused by contaminated stuffed pork, Andalusia, Spain, July to October 2019

Fernández-Martínez NF, Ruiz-Montero R, Briones E, Baños E, García San Miguel Rodríguez-Alarcón L, Chaves JA, Abad R, Varela C; LISMOAN team; Lorusso N. Euro Surveill . 2022 Oct;27(43):2200279

PUBMED DOI

Pertactin-Deficient Bordetella pertussis with Unusual Mechanism of Pertactin Disruption, Spain, 1986-2018

14. Mir-Cros A, Moreno-Mingorance A, Martín-Gómez MT, Abad R, Bloise I, Campins M, González-Praetorius A, Gutiérrez MN, Martín-González H, Muñoz-Almagro C, Orellana MÁ, de Pablos M, Roca-Grande J, Rodrigo C, Rodríguez ME, Uriona S, Vidal MJ, Pumarola T, Larrosa MN, González-López JJ. Emerg Infect Dis. 2022 May;28(5):967-976

PUBMED DOI

Large Increase in Azithromycin-Resistant Neisseria gonorrhoeae in Northern Spain

Carballo R, Povoa MC, Abad R, Navarro C, Martin E, Alvarez M, Salgado A, Potel C. Microb Drug Resist. 2022 Jan;28(1):81-86

PUBMED DOI

High susceptibility to zoliflodacin and conserved target (GyrB) for zoliflodacin among 1209 consecutive clinical Neisseria gonorrhoeae isolates from 25 European countries, 2018.

Unemo M, Ahlstrand J, Sánchez-Busó L, Day M, Aanensen D, Golparian D, Jacobsson S, Cole MJ, Torreblanca RA, Ásmundsdóttir LR, Balla E, De Baetselier I, Bercot B, Carannante A, Caugant D, Borrego MJ, Buder S, Cassar R, Cole M, Dam A, Eder C, Hoffmann S, Hunjak B, Jeverica S, Kirjavainen V, Maikanti-Charalambous P, Miriagou V, Mlynarczyk-Bonikowska B, Pakarna G, Patterson L, Pavlik P, Perrin M, Shepherd J, Stefanelli P, Unemo M, Jelena V, Zákoucká H. J Antimicrob Chemother. 2021 Feb 10:dkab024

PUBMED DOI

Molecular characterization of invasive serogroup B Neisseria meningitidis isolates from Spain during 2015-2018: Evolution of the vaccine antigen factor H binding protein (FHbp)

Abad R, García-Amil C, Navarro C, Martín E, Martín-Díaz A, Vázquez JA. J Infect. 2021 Apr;82(4):37-44

PUBMED DOI

Meningococcal Serogroup B Disease in Vaccinated Children

Soler-Garcia A, Fernández de Sevilla M, Abad R, Esteva C, Alsina L, Vázquez J, Muñoz-Almagro C, Noguera-Julian A. J Pediatric Infect Dis Soc. 2020 Sep 17;9(4):454-459

PUBMED DOI

Distribution of DNA gyrase cleavage sites across the Streptococcus pneumoniae genome: relation to transcription and methylation at GATC sites

Ferrándiz MJ, Hernández P, de la Campa AG. Nucleic Acids Res. 2025; 53(21):gkaf1183.

PUBMED DOI

First Insight into the Genome Sequences of Two Linezolid-Resistant Nocardia farcinica Strains Isolated from Patients with Cystic Fibrosis

2: Valdezate S, Monzón S, Garrido N, Zaballos A, Medina-Pascual MJ, Azcona-Gutiérrez JM, Vilar B, Cuesta I. First Insight into the Genome Sequences of Two Linezolid-Resistant Nocardia farcinica Strains Isolated from Patients with Cystic Fibrosis. Genome Announc. 2017 Nov 16;5(46).

PUBMED DOI

Apoptosis, Toll-like, RIG-I-like and NOD-like Receptors Are Pathways Jointly Induced by Diverse Respiratory Bacterial and Viral Pathogens.

3: Martínez I, Oliveros JC, Cuesta I, de la Barrera J, Ausina V, Casals C, de Lorenzo A, García E, García-Fojeda B, Garmendia J, González-Nicolau M, Lacoma A, Menéndez M, Moranta D, Nieto A, Ortín J, Pérez-González A, Prat C, Ramos-Sevillano E, Regueiro V, Rodriguez-Frandsen A, Solís D, Yuste J, Bengoechea JA, Melero JA. Apoptosis, Toll-like, RIG-I-like and NOD-like Receptors Are Pathways Jointly Induced by Diverse Respiratory Bacterial and Viral Pathogens. Front Microbiol. 2017 Mar 1;8:276

PUBMED DOI

Molecular identification, antifungal resistance and virulence of Cryptococcus neoformans and Cryptococcus deneoformans isolated in Seville, Spain

Gago S, Serrano C, Alastruey-Izquierdo A, Cuesta I, Martín-Mazuelos E, Aller AI, Gómez-López A, Mellado E. Molecular identification, antifungal resistance and virulence of Cryptococcus neoformans and Cryptococcus deneoformans isolated in Seville, Spain. Mycoses. 2017 Jan;60(1):40-50

PUBMED DOI

High-Quality Draft Genome Sequence of Babesia divergens, the Etiological Agent of Cattle and Human Babesiosis

7: Cuesta I, González LM, Estrada K, Grande R, Zaballos A, Lobo CA, Barrera J, Sanchez-Flores A, Montero E. High-Quality Draft Genome Sequence of Babesia divergens, the Etiological Agent of Cattle and Human Babesiosis. Genome Announc. 2014 Nov 13;2(6).

PUBMED DOI

Serum galactomannan-based early detection of invasive aspergillosis in hematology patients receiving effective antimold prophylaxis

8: Duarte RF, Sánchez-Ortega I, Cuesta I, Arnan M, Patiño B, Fernández de Sevilla A, Gudiol C, Ayats J, Cuenca-Estrella M. Serum galactomannan-based early detection of invasive aspergillosis in hematology patients receiving effective antimold prophylaxis. Clin Infect Dis. 2014 Dec 15;59(12):1696-702.

PUBMED DOI

Analysis of the protein domain and domain architecture content in fungi and its application in the search of new antifungal targets.

9: Barrera A, Alastruey-Izquierdo A, Martín MJ, Cuesta I, Vizcaíno JA. Analysis of the protein domain and domain architecture content in fungi and its application in the search of new antifungal targets. PLoS Comput Biol. 2014 Jul 17;10(7):e1003733.

PUBMED DOI

Cryptococcus neoformans can form titan-like cells in vitro in response to multiple signals

2. Trevijano-Contador N, de Oliveira HC, García-Rodas R, Rossi SA, Llorente I, Zaballos Á, Janbon G, Ariño J, Zaragoza Ó. Cryptococcus neoformans can form titan-like cells in vitro in response to multiple signals. PLoS Pathog. 2018 May 18;14(5):e1007007.

PUBMED DOI

Reclassification of the Candida haemulonii complex as Candida haemulonii (C. haemulonii group I), C. duobushaemulonii sp. nov. (C. haemulonii group II), and C. haemulonii var. vulnera var. nov.: three multiresistant human pathogenic yeasts

4. Cendejas-Bueno E, Kolecka A, Alastruey-Izquierdo A, Theelen B, Groenewald M, Kostrzewa M, Cuenca-Estrella M, Gómez-López A, Boekhout T. Reclassification of the Candida haemulonii complex as Candida haemulonii (C. haemulonii group I), C. duobushaemulonii sp. nov. (C. haemulonii group II), and C. haemulonii var. vulnera var. nov.: three multiresistant human pathogenic yeasts. J Clin Microbiol.

PUBMED DOI

Content with Investigacion Inmunopatología del SIDA .

List of staff

Additional Information

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 Inmunopatología del SIDA .