4 documents found, page 1 of 1
Mycobacterium ulcerans Triggers T-cell immunity followed by local and regional ...
Fraga, Alexandra G.; Cruz, Andrea; Martins, Teresa G.; Torrado, Egídio; Saraiva, Margarida; Pereira, Daniela Maria Ramos; Meyers, Wayne M.Buruli ulcer (BU) is a neglected infectious disease caused by Mycobacterium ulcerans, characterized by necrotic cutaneous lesions induced by the exotoxin mycolactone. Despite evidence of Th1-mediated protective immunity, M. ulcerans infection has been associated with systemic immunosuppression. We show that early during mouse infection with either mycolactone-positive or negative strains, pathogen-specific IFN-...
TLR2 deficiency by compromising p19 (IL-23) expression limits T helper 17 cell ...
Coelho, Maria Teixeira; Cruz, Andrea; Carmona, J. A.; Sousa, Carole Lara Veiga de; Pereira, Daniela Maria Ramos; Saraiva, Ana Laura; Veldhoen, MarcThe authors are grateful to Drs. Manuel Teixeira da Silva, Fernando Rodrigues, Margarida Correia-Neves and Paul S. Redford for critically reading this manuscript and thank the personnel at the ICVS animal house facility for excellent animal husbandry.; CD4+ Th1 cells producing IFN-γ are of extreme importance in controlling infections by Mycobacterium tuberculosis both in mice and in men. In addition to IFN-γ-pr...
Pathological role of interleukin 17 in mice subjected to repeated BCG vaccinati...
Cruz, Andrea; Fraga, Alexandra G.; Fountain, Jeffrey J.; Rangel-Moreno, Javier; Torrado, Egídio; Saraiva, Margarida; Pereira, Daniela Maria RamosInfection usually leads to the development of acquired immune responses associated with clearance or control of the infecting organism. However, if not adequately regulated, immune-mediated pathology can result. Tuberculosis is a worldwide threat, and development of an effective vaccine requires that the protective immune response to Mycobacterium tuberculosis (Mtb) be dissected from the pathological immune res...
Modulation of the immune response to mycobacteria: implications on protection a...
Pereira, Daniela Maria RamosDissertação de mestrado em Genética Molecular; Effective control of Mycobacterium tuberculosis infection requires the induction of inflammatory T helper (Th) 1 responses and avoidance of tissue damage. However, little is known about the mechanisms that rule the fine balance between protection and pathology in this infection. The anti-inflammatory cytokine IL-10 is important for the regulation of the immune resp...