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Research & Scientists | Microbiology & Infection | People | CLAUDIANOBREGA

 

Name: Cláudia Nóbrega

Office: I3.02

School Phone: +351 253 604 834

Email: claudianobrega@med.uminho.pt

 

 

 

Keywords: T cells infection mycobacteria HIV

About

My main research interest is to study of the immune response to mycobacterial infections, being my main focus of interest the acquired immune response and, more specifically the role of the thymus during chronic infections. We have observed that the thymus is a target organ for mycobacteria (Nobrega et al 2007; for a review on thymic infection, in general, please see Nunes-Alves et al., 2013). As a site for T cell “education” and differentiation, we discovered that infection of the thymus was responsible for the generation of T cells tolerant to mycobacterial antigens (Nobrega et al 2010). Additionally, we described that bacterial growth within the thymus is controlled by T cells that came from the periphery back to the thymus (Nobrega & Nunes-Alves et al 2013).

Moving from the mouse model to humans, but keeping my main interest on the immune response to infection, in particular on T cells during HIV infection, I am now interested in better understanding the mechanisms underlying the protective role of T cells during the immune response against tuberculosis and, why these cells are, in certain circumstances responsible for immunopathology. I am also interested in exploiting the factors involve on the immune reconstitution’s failure of HIV-infected individuals doing anti-retroviral therapy (Horta & Nobrega et al 2013).I have acquired expertise in several techniques that enable me to address main questions at the cellular and molecular level both in vitro (e.g. flow cytometry, microscopy, cell culture techniques, nucleic acid and gene expression analysis) and in vivo (e.g. cell and tissue transplantation assays using the mouse model, infection, antibiotic treatment). I have also gained competences to work in laboratories of biosafety level (BSL) 2 and 3.

At the moment, I am co-responsible for the flow cytometry unit at the ICVS.

 

Most relevant publications:

Nobrega, C.*, C.Nunes-Alves*, B.Cerqueira-Rodrigues, S. Roque, P. Barreira-Silva, S. M. Behar, and M.Correia-Neves. T cells home to the thymus and control infection. Journal of Immunology, 2013 190:1646-58. * These authors have equally contributed to this work.

Horta, A.*, C.Nobrega*, P. Amorim-Machado, V. Coutinho-Teixeira, P. Barreira-Silva,S.Boavida, P. Costa, R. Sarmento-Castro, A. G. Castro, and M. Correia-Neves. Poor Immune Reconstitution in HIV-Infected PatientsAssociates with High Percentage of Regulatory CD4(+) T Cells. PLoS One, 2013,8(2):e57336.* These authors have equally contributed to this work. 

R. Duarte, A. Afonso, C. Ferreira, S. Roque, O.Vasconcelos, R. Sarmento-Castro, M. Tavares, C. Caldas, R. Greenwald, K.Lyashchenko, M. Correia-Neves, C.Nobrega, “A case-control study on the diagnostic potential of multi-antigenserologicaltests for tuberculosis”. Archives of Clinical Microbiology, 2012,3(2): 1.

C. Nobrega, S.Roque, C. Nunes-Alves, A. Coelho, I. Medeiros, A.G. Castro, R. Appelberg, M. Correia-Neves, “Dissemination of mycobacteria tothe thymus renders newly generated T cells tolerant to the invading pathogen”,Journal of Immunology,2010, 184: 351.

C. Nobrega, P.J. Cardona, S. Roque, P. Pinto do Ó, R. Appelberg,M. Correia-Neves, “The thymusas a target organ for mycobacterial infections”,Microbes and Infection, 2007,9: 1521.


Projects

Active tuberculosis in diabetic patients: biological basis for the increased susceptibility  

Immune reconstitution of HIV patients: the role of regulatory T cells and the thymus  

Selected Publications

Nunes-Alves, Cláudio, Claudia Nobrega, Samuel M. Behar, and Margarida Correia-Neves. "Tolerance has its limits: how the thymus copes with infection." Trends in immunology (2013), in press.

Nobrega C, Roque S, Nunes-Alves C, Coelho A, Medeiros I, Castro AG, Appelberg R, Correia-Neves M. Dissemination of mycobacteria to the thymus renders newly generated T cells tolerant to the invading pathogen. J Immunol. 2010 Jan 1;184(1):351-8. doi: 10.4049/jimmunol.0902152. Epub 2009 Nov 30.

Nobrega, Claudia, Cláudio Nunes-Alves, Bruno Cerqueira-Rodrigues, Susana Roque, Palmira Barreira-Silva, Samuel M. Behar, and Margarida Correia-Neves. T cells home to the thymus and control infection. The Journal of Immunology 190, no. 4 (2013): 1646-1658.

Fernandes E, Martins VC, Nóbrega C, Carvalho CM, Cardoso FA, Cardoso S, Dias J, Deng D, Kluskens LD, Freitas PP, Azeredo J. A bacteriophage detection tool for viability assessment of Salmonella cells. Biosens Bioelectron. 2014 Feb 15;52:239-46. doi: 10.1016/j.bios.2013.08.053.

Afonso-Barroso A, Clark SO, Williams A, Rosa GT, Nóbrega C, Silva-Gomes S, Vale-Costa S, Ummels R, Stoker N, Movahedzadeh F, van der Ley P, Sloots A, Cot M, Appelmelk BJ, Puzo G, Nigou J, Geurtsen J, Appelberg R. Lipoarabinomannan mannose caps do not affect mycobacterial virulence or the induction of protective immunity in experimental animal models of infection and have minimal impact on in vitro inflammatory responses. Cell Microbiol. 2013 April, 15(4):660-674. doi: 10.1111/cmi.12065

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