Consulta: subjectFacets:"Innate Immunity"
Registros recuperados: 2
Data/hora: 08/06/2024 16:21:52

Antimicrobial histones and DNA traps in invertebrate immunity: evidences in Crassostrea gigas.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Poirier, Aurore C.; Schmitt, Paulina; Rosa, Rafael D.; Vanhove, Audrey S.; Kieffer-jaquinod, Sylvie; Rubio, Tristan P.; Charriere, Guillaume M.; Destoumieux-garzon, Delphine.
Although antimicrobial histones have been isolated from multiple metazoan species, their role in host defense has long remained unanswered. We found here that the hemocytes of the oyster Crassostrea gigas release antimicrobial H1-like and H5-like histones in response to tissue damage and infection. These antimicrobial histones were shown to be associated with extracellular DNA networks released by hemocytes, the circulating immune cells of invertebrates, in response to immune challenge. The hemocyte-released DNA was found to surround and entangle vibrios. This defense mechanism is reminiscent of the neutrophil extracellular traps (ETs) recently described in vertebrates. Importantly, oyster ETs were evidenced in vivo in hemocyte-infiltrated interstitial...
Tipo: Text
Palavras-chave: Antimicrobial Peptide (AMP); DNA; Innate Immunity; Invertebrate; Reactive Oxygen Species (ROS); NET; Mollusk.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00217/32866/31784.pdf

Toll-like Receptors are Key Participants in Innate Immune Responses
Provedor de dados: Biological Research
Autores: ARANCIBIA,SERGIO A; BELTRÁN,CAROLL J; AGUIRRE,ISABEL M; SILVA,PAULINA; PERALTA,ALEXIS L; MALINARICH,FRANO; HERMOSO,MARCELA A.
During an infection, one of the principal challenges for the host is to detect the pathogen and activate a rapid defensive response. The Toll-like family of receptors (TLRs), among other pattern recognition receptors (PRR), performs this detection process in vertebrate and invertebrate organisms. These type I transmembrane receptors identify microbial conserved structures or pathogen-associated molecular patterns (PAMPs). Recognition of microbial components by TLRs initiates signaling transduction pathways that induce gene expression. These gene products regulate innate immune responses and further develop an antigen-specific acquired immunity. TLR signaling pathways are regulated by intracellular adaptor molecules, such as MyD88, TIRAP/Mal, between others...
Tipo: Journal article
Palavras-chave: Toll-like receptors; Innate Immunity; Cytokines; MyD88; NFkB.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000200001