Data/hora: 01/06/2024 03:36:21

Provedor de dados: | 55
País: | Brazil
Título: | The effects of nitric oxide on the immune response during giardiasis
Autores: | Pavanelli,Wander Rogério; Gutierrez,Fredy Roberto Salazar; Silva,Jean Jerley Nogueira da; Costa,Ivete Conchon; Menezes,Maria Claudia Noronha Dutra de; Oliveira,Francisco José de Abreu; Itano,Eiko Nakagawa; Watanabe,Maria Angélica Ehara.
Data: | 2010-12-01
Ano: | 2010
Palavras-chave: | Nitric oxide; Immune system; Giardiasis.
Resumo: | Nitric oxide (NO) is a free radical synthesized from L-arginine by different isoforms NO-synthases. NO possesses multiple and complex biological functions. NO is an important mediator of homeostasis, and changes in its generation or actions can contribute or not to pathological states. The knowledge of effects of NO has been not only important to our understanding of immune response, but also to new tools for research and treatment of various diseases. Knowing the importance of NO as inflammatory mediator in diverse infectious diseases, we decided to develop a revision that shows the participation/effect of this mediator in immune response induced against Giardia spp. Several studies already demonstrated the participation of NO with microbicidal and microbiostatic activity in giardiasis. On the other hand, some works report that Giardia spp. inhibit NO production by consuming the intermediate metabolite arginine. In fact, studies in vitro showed that G. lamblia infection of human intestinal epithelial cells had reduced NO production. This occurs due to limited offer of the crucial substrate arginine (essential aminoacid for NO production), consequently reducing NO production. Therefore, the balance between giardial arginine consumption and epithelial NO production could contribute to the variability of the duration and severity of infections by this ubiquitous parasite.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000600010
Editor: | Brazilian Society of Infectious Diseases
Relação: | 10.1590/S1413-86702010000600010
Formato: | text/html
Fonte: | Brazilian Journal of Infectious Diseases  v.14 n.6 2010
Fonte: | info:eu-repo/semantics/openAccess