نتایج جستجو برای: tlr ii
تعداد نتایج: 587899 فیلتر نتایج به سال:
سلول های بنیادی مزانشیمال، سلولهای بنیادی بالغی هستندکه به بعنوان سلول های پیش ساز غیر خون ساز وچند توانی معرفی می شوند که در طیف وسیعی از بافتهای بالغ بدن یافت می شوند. toll like receptor(tlr) یکی از گیرنده های ها ایمنی بیان شده در سطح سلول های بنیادی مزانشیمال می باشد که می تواند طیف وسیعی از عملکرد های سلول را تحت الشعاع قراردهند.اخیراً مشخص شده است تحریک ویژه tlrدر سطح سلول های بنیادی مزانش...
چکیده ندارد.
Mycobacterium tuberculosis (MTB) induces vigorous immune responses, yet persists inside macrophages, evading host immunity. MTB bacilli or lysate was found to inhibit macrophage expression of class II MHC (MHC-II) molecules and MHC-II Ag processing. This report characterizes and identifies a specific component of MTB that mediates these inhibitory effects. The inhibitor was extracted from MTB l...
Deoxyribonuclease (DNase) II in macrophages cleaves the DNA of engulfed apoptotic cells and of nuclei expelled from erythroid precursor cells. DNase II-deficient mouse embryos accumulate undigested DNA in macrophages, and die in feto because of the activation of the interferon beta (IFNbeta) gene. Here, we found that the F4/80-positive macrophages in DNase II(-/-) fetal liver specifically produ...
The default response of the intestinal immune system to most antigens is the induction of immunological tolerance, which is difficult to reconcile with the constant exposure to ligands for TLR and other pattern recognition receptors. We showed previously that dendritic cells (DC) from the lamina propria of normal mouse intestine may be inherently tolerogenic and here we have explored how this m...
background: during recent years, infection of acinetobacter baumanii showed a rapid growth in hospitals and community. toll-like receptors (tlrs) are the most important pattern recognition receptors, which play a critical role during recognizing invading pathogens by the natural immune system. our objective was to determine the associations of tlrs polymorphisms with the susceptibility to a. ba...
Toll-like receptors (TLRs) have critical roles in innate immunity and inflammation and the detailed mechanisms by which TLR signaling is fine tuned remain unclear. Keratin 8 (CK8) belongs to the type II keratin family and is the major compontent of the intermediate filaments of simple or single-layered epithelia. Here we report that down-regulation of CK8 in mice enhanced TLR-mediated responses...
While mannosylation targets antigens to mannose receptors on dendritic cells (DC), the resultant immune response is suboptimal. We hypothesized that the addition of toll-like receptor (TLR) ligands would enhance the DC response to mannosylated antigens. Cryptococcus neoformans mannoproteins (MP) synergized with CpG-containing oligodeoxynucleotides to stimulate enhanced production of proinflamma...
background: natural killer (nk) cells play an important role in early stages of innate immune responses against viral and tumoral attacks. activation of nk cells by leishmaniasis results in secretion of cytokines such as interferon (ifn)-γ and tumor necrosis factor (tnf)-α, which enhances the phagocytosis and clearance of parasite. lipophosphoglycan 3 (lpg3), the leishmania homologous with grp...
Focal adhesion kinase (FAK) is a nonreceptor protein tyrosine kinase involved in signaling downstream of integrins, linking bacterial detection, cell entry, and initiation of proinflammatory response through MAPKs and NF-kappaB activation. In this study, using protein I/II from Streptococcus mutans as a model activator of FAK, we investigated the potential link between FAK and TLR pathways. Usi...
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