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An NLRP7-containing inflammasome mediates recognition of microbial lipopeptides in human macrophages.
Khare, Sonal; Dorfleutner, Andrea; Bryan, Nicole B; Yun, Chawon; Radian, Alexander D; de Almeida, Lucia; Rojanasakul, Yon; Stehlik, Christian.
Afiliação
  • Khare S; Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Immunity ; 36(3): 464-76, 2012 Mar 23.
Article em En | MEDLINE | ID: mdl-22361007
Cytosolic pathogen- and damage-associated molecular patterns are sensed by pattern recognition receptors, including members of the nucleotide-binding domain and leucine-rich repeat-containing gene family (NLR), which cause inflammasome assembly and caspase-1 activation to promote maturation and release of the inflammatory cytokines interleukin-1ß (IL-1ß) and IL-18 and induction of pyroptosis. However, the contribution of most of the NLRs to innate immunity, host defense, and inflammasome activation and their specific agonists are still unknown. Here we describe identification and characterization of an NLRP7 inflammasome in human macrophages, which is induced in response to microbial acylated lipopeptides. Activation of NLRP7 promoted ASC-dependent caspase-1 activation, IL-1ß and IL-18 maturation, and restriction of intracellular bacterial replication, but not caspase-1-independent secretion of the proinflammatory cytokines IL-6 and tumor necrosis factor-α. Our study therefore increases our currently limited understanding of NLR activation, inflammasome assembly, and maturation of IL-1ß and IL-18 in human macrophages.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Proteínas Adaptadoras de Transdução de Sinal / Lipopeptídeos / Inflamassomos / Macrófagos Tipo de estudo: Prognostic_studies Limite: Humans Idioma: En Ano de publicação: 2012 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Proteínas Adaptadoras de Transdução de Sinal / Lipopeptídeos / Inflamassomos / Macrófagos Tipo de estudo: Prognostic_studies Limite: Humans Idioma: En Ano de publicação: 2012 Tipo de documento: Article