Consulta: subjectFacets:"Innate immune response"
Registros recuperados: 4
Data/hora: 04/06/2024 11:39:58

Insights into the antiviral functions of the RNAi machinery in penaeid shrimp
Provedor de dados: 5
Autores: Labreuche, Yannick; Warr, Gregory W.
Over the last decade, RNA interference pathways have emerged in eukaryotes as critical regulators of many diverse biological functions including, among others, transcriptional gene regulation, post-transcriptional gene silencing, heterochromatin remodelling, suppression of transposon activity, and antiviral defences. Although this gene silencing process has been reported to be relatively well conserved in species of different phyla, there are important discrepancies between plants, invertebrates and mammals. In penaeid shrimp, the existence of an intact and functional RNAi machinery is supported by a rapidly growing body of evidence. However, the extent to which this process participates to the host immune responses remains poorly defined in this non-model...
Tipo: Text
Palavras-chave: Shrimp; Innate immune response; In vertebrate immunity; RNA interference; Virus.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00119/23063/20899.pdf

Lack of evidence for Litopenaeus vannamei Toll receptor (lToll) involvement in activation of sequence-independent antiviral immunity in shrimp
Provedor de dados: 5
Autores: Labreuche, Yannick; O'Leary, Nuala A.; De La Vega, Enrique; Veloso, Artur; Gross, Paul S.; Chapman, Robert W.; Browdy, Craig L.; Warr, Gregory W.
injection of non-specific dsRNA initiates a broad-spectrum innate antiviral immune response in the Pacific white shrimp, Litopenaeus vannamei, however, the receptor involved in recognition of this by-product of viral infections remains unknown. In vertebrates, dsRNA sensing is mediated by a class of Toll-like receptors (TLRs) and results in activation of the interferon system. Because a TLR (lToll) was recently characterized in L. vannamei, we investigated its potential role in dsRNA recognition. We showed that injection of non-specific RNA duplexes did not modify lToll gene expression. A reverse genetic approach was therefore implemented to study its role in vivo. Silencing of lToll did not impair the ability of nonspecific dsRNA to trigger protection...
Tipo: Text
Palavras-chave: Shrimp; Virus; RNA interference; Invertebrate immunity; Innate immune response; Toll like receptor; DSRNA.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6428.pdf

Classical and alternative macrophages have impaired function during acute and chronic HIV-1 infection
Provedor de dados: 55
Autores: Galvão-Lima,Leonardo J.; Espíndola,Milena S.; Soares,Luana S.; Zambuzi,Fabiana A.; Cacemiro,Maira; Fontanari,Caroline; Bollela,Valdes R.; Frantz,Fabiani G.
Abstract  Objectives: Three decades after HIV recognition and its association with AIDS development, many advances have emerged – especially related to prevention and treatment. Undoubtedly, the development of Highly Active Antiretroviral Therapy (HAART) dramatically changed the future of the syndrome that we know today. In the present study, we evaluate the impact of Highly Active Antiretroviral Therapy on macrophage function and its relevance to HIV pathogenesis.  Methods: PBMCs were isolated from blood samples and monocytes (CD14+ cells) were purified. Monocyte-Derived Macrophages (MDMs) were activated on classical (MGM-CSF+IFN-γ) or alternative (MIL-4+IL13) patterns using human recombinant cytokines for six days. After this period, Monocyte-Derived...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HIV-1; Innate immune response; HAART; Macrophages.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000100042

Inactivated Parapoxvirus ovis induces a transient increase in the expression of proinflammatory, Th1-related, and autoregulatory cytokines in mice
Provedor de dados: 56
Autores: Anziliero,D.; Weiblen,R.; Kreutz,L.C.; Spilki,F.; Flores,E.F.
The immunostimulatory properties of inactivated Parapoxvirus ovis (iPPVO) have long been investigated in different animal species and experimental settings. In this study, we investigated the effects of iPPVO on cytokine expression in mice after intraperitoneal inoculation. Spleen and sera collected from iPPVO-treated mice at intervals after inoculation were submitted to cytokine mRNA determination by real-time PCR (qPCR), serum protein concentration by ELISA, and interferon (IFN)-α/β activity by bioassay. The spleen of iPPVO-treated animals showed a significant increase in mRNA expression of all cytokines assayed, with different kinetics and magnitude. Proinflammatory cytokines interleukin (IL)-1β, tumor necrosis factor-alpha (TNF-α), and IL-8 mRNA peaked...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytokine; MRNA; ORF virus; Immunostimulant; Innate immune response.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000200110