Psoriasis is a common inflammatory disease affecting 1% of the Brazilian population. Th17 and Th1cells are involved with the immunopathogenisis of psoriasis. In this article it is discussed the interaction between the innate immunity (especially dendritic cells and keratinocytes) and adaptive immunity (T lymphocytes) in the pathogenesis of psoriasis.

Celiac disease is a chronic infammatory process of the small intestne mediated by the immune system which afects genetcally susceptble individuals following the ingeston of prolamins from wheat and other cereals. The interacton between genetc and environmental factors determines the loss of tolerance to gluten and the development of the intestnal lesion, with variable clinical and functonal rep...

Psoriasis is an immunologically mediated disease caused by activation of T lymphocytes that elaborate a Th1 type of immune response. Targeted manipulation of the various mechanisms involved in T cell activation and blockade or inactivation of the various proinflammatory cytokines released by the process of T cell activation are methods used in treatment of psoriasis by use of 'biologicals'.

Severe sepsis refers to the syndrome of fever, hypotension and organ dysfunction resulting from infection, commonly due to Gram-negative or Gram-positive bacteria with or without bacteraemia1. Occasionally, non-bacterial pathogens, including fungi, rickettsiae, protozoa and viruses, can cause a similar syndrome. The first line of defence against infecting organisms comprises highly conserved in...