Organ Transplant
Research Lines
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Hepatitis
- Diseño de métodos diagnósticos para el estudio de los virus de las hepatitis (VH) A, B, C, D, E: Diseñamos sistemas de PCR para su detección y caracterización.
- Evaluación de métodos diagnósticos de los VH. Colaboramos con empresas para estudios de sensibilidad y especificidad de equipos diagnósticos.
- Estudios de Seroprevalencia de los virus de las hepatitis.
- Epidemiología genómica de genomas completos de VHA, VHB, VHC, VHD y VHE en colaboración con el ECDC. Estudios de trazabilidad del VHE.
- Caracterización molecular de virus de las hepatitis mediante secuenciación masiva: a) VHB: mutantes de escape HBsAg (prevalencia y efectos en la detección del HBsAg). Estudio de mutaciones en epítopos de estimulación inmune y mutaciones asociadas a evolución clínica desfavorable.
- b) VHC: resistencias a los antivirales de acción directa. Análisis molecular de subtipos poco frecuentes.
c) Estudios filogenéticos del VHD.
d) Análisis genómico del VHE.
e) Investigación etiológica de hepatitis no filiadas mediante estudios de metagenómica.
- b) VHC: resistencias a los antivirales de acción directa. Análisis molecular de subtipos poco frecuentes.
Research projects
Content with Investigacion .
1. Proyecto CIBEREPS 2022. Microbiological and genomic investigation of hepatitis in children by metagenomic approach in case and control subjects (IP: Ana Avellón).
2023-2024. En colaboración con el Hospital San Joan de Deu de Barcelona.
2. MPY 501-19: Tracking hepatitis E virus infection by means of epidemiological research and whole genome sequencing. Project TrazHE. (IP: Ana Avellón). 2020-2024.
3. Proyecto CIBEREPS 2021 Metagenomic sequencing to identify viral aetiologies in undiagnosed paediatric cases of meningitis and encephalitis (IP: D. Tarragó). 2021-2022.
4. MPY 383/19 (PEJ2018-004446-A). Ayudas para la promoción de empleo joven e implantación de la garantía juvenil en I+D+I. análisis de la complejidad de secuencias de los virus de la hepatitis A, B, C; D y E (VHA, VHB, VHC, VHD y VHE) mediante técnicas de secuenciación masiva. (IP: Ana Avellón). 2020-2021.
5. MPY 1285/16 Movilidad "Salvador de Madariaga" programa estatal de promoción de talento y su empleabilidad. (IP: Ana Avellón). 2016.
Publications
Dissemination of extensively drug-resistant NDM-producing Providencia stuartii in Europe linked to patients transferred from Ukraine, March 2022 to March 2023
17. Dissemination of extensively drug-resistant NDM-producing Providencia stuartii in Europe linked to patients transferred from Ukraine, March 2022 to March 2023. Autores: Witteveen S, Hans JB, Izdebski R, Hasman H, Samuelsen Ø, Dortet L, Pfeifer Y, Delappe N, Oteo-Iglesias J, Żabicka D, Cormican M, Sandfort M, Reichert F, Pöntinen AK, Fischer MA, Verkaik N, Pérez-Vazquez M, Pfennigwerth N, Hammerum AM, Hallstrøm S, Biedrzycka M, Räisänen K, Wielders CC, Urbanowicz P, de Haan A, Westmo K, Landman F, van der Heide HG, Lansu S, Zwittink RD, Notermans DW, Guzek A, Kondratiuk V, Salmanov A, Haller S, Linkevicius M, Gatermann S, Kohlenberg A, Gniadkowski M, Werner G, Hendrickx AP. Revista: Euro Surveill. 2024 Jun;29(23):2300616.
PUBMED DOISpread of the FAR-MRSA clone, a fusidic acid- and meticillin-resistant Staphylococcus aureus ST121, Europe, 2014 to 2024.
19. Spread of the FAR-MRSA clone, a fusidic acid- and meticillin-resistant Staphylococcus aureus ST121, Europe, 2014 to 2024. Autores: Roer L, Yin N, Denis O, Vendrik KE, Zwittink RD, Notermans DW, Perrin M, Khonyongwa K, Tristan A, Youenou B, Layer-Nicolaou F, Werner G, Enger H, Eikrem ECH, Darenberg J, Mäkitalo B, Paulsson M, Björkman J, Fang H, Hallbäck ET, Sundqvist M, Lindholm L, Moganeradj K, García-Cobos S, Cañada-García JE, Holzknecht BJ, Eriksen HB, Hoppe M, Bartels MD, Samaniego Castruita JA, Urth TR, Larsen AR, Petersen A. Revista: Euro Surveill. 2025 Jul;30(28):2500452.
DOICarbapenemase-producing Emergence of NDM-producing Klebsiella pneumoniae and Escherichia coli in Spain: phylogeny, resistome, virulence and plasmids encoding blaNDM-like genes as determined by WGS. aeruginosa in Spain: interregional dissemination of the high risk-clones ST175 and ST244 carrying blaVIM-2, blaVIM-1, blaIMP-8, blaVIM-20 and blaKPC-2
14. Emergence of NDM-producing Klebsiella pneumoniae and Escherichia coli in Spain: phylogeny, resistome, virulence and plasmids encoding blaNDM-like genes as determined by WGS. Autores: Pérez-Vázquez M, Sola Campoy PJ, Ortega A, Bautista V, Monzón S, Ruiz-Carrascoso G, Mingorance J, González-Barberá EM, Gimeno C, Aracil B, Sáez D, Lara N, Fernández S, González-López JJ, Campos J, Kingsley RA, Dougan G, Oteo-Iglesias J; Spanish NDM Study Group. Revista: J Antimicrob Chemother. 2019 Dec 1;74(12):3489-3496.
PUBMED DOIAdditional Information
Induction of allograft tolerance remains a goal to be achieved in organ transplantation. Most therapeutic strategies focus on inhibition of the adaptive immune system, but recent data demonstrate that allogeneic recognition of myeloid cells initiates transplant rejection. Therapies targeting myeloid cells “in vivo” represent a potential target to induce immunological tolerance, but remain clinically unexplored.
Our laboratory uses a revolutionary nanoimmunotherapy of high-density lipoprotein (HDL) nanoparticles loaded with rapamycin (mTORi-HDL) that prevents epigenetic modifications associated with trained immunity, a recently discovered functional state of macrophages. Using an experimental mouse transplant model, our results demonstrate that the administration of this immunotherapy with mTORi-HDL prevents the immune response and promotes tolerance to the transplanted organ.
Our laboratory shows a multidisciplinary research approach articulated in three different objectives to evaluate the clinical relevance and therapeutic effects of immunotherapy in preparation for a clinical trial in organ transplantation. The general objectives will be aimed at confirming the identification of trained immunity as a biomarker and analytical value to predict the risk of rejection in transplant patients under three conditions: prolonged periods of ischemic reperfusion (IRI) (objective 1), allosensitization (objective 2) and infection (objective 3).
Induction of allograft tolerance remains a goal to be achieved in organ transplantation. Most therapeutic strategies focus on inhibition of the adaptive immune system, but recent data demonstrate that allogeneic recognition of myeloid cells initiates transplant rejection. Therapies targeting myeloid cells “in vivo” represent a potential target to induce immunological tolerance, but remain clinically unexplored.
Our laboratory uses a revolutionary nanoimmunotherapy of high-density lipoprotein (HDL) nanoparticles loaded with rapamycin (mTORi-HDL) that prevents epigenetic modifications associated with trained immunity, a recently discovered functional state of macrophages. Using an experimental mouse transplant model, our results demonstrate that the administration of this immunotherapy with mTORi-HDL prevents the immune response and promotes tolerance to the transplanted organ.
Our laboratory shows a multidisciplinary research approach articulated in three different objectives to evaluate the clinical relevance and therapeutic effects of immunotherapy in preparation for a clinical trial in organ transplantation. The general objectives will be aimed at confirming the identification of trained immunity as a biomarker and analytical value to predict the risk of rejection in transplant patients under three conditions: prolonged periods of ischemic reperfusion (IRI) (objective 1), allosensitization (objective 2) and infection (objective 3).