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Open AccessJournal ArticleDOI

Proinflammatory activity of glycosylphosphatidylinositol anchors derived from Trypanosoma cruzi: structural and functional analyses.

TLDR
A detailed analysis of the correlation between structure and proinflammatory activity by Trypanosoma cruzi‐derived GPI anchors is provided and the implications in resistance and pathogenesis during the infection with T. cruzi are discussed.
Abstract
A strong activation of macrophages is observed during acute infection with Trypanosoma cruzi. Little is known, however, about the parasite molecules that are responsible for this early acti- vation of innate immunity. Recent studies have shown the stimulatory activity of protozoan-de- rived glycosylphosphatidylinositol (GPI) anchors on cultured macrophages. In this review, we pro- vide a detailed analysis of the correlation between structure and proinflammatory activity by T. cruzi- derived GPI anchors. We also cover the studies that have identified the Toll-like receptor 2 as a functional GPI receptor and have partially charac- terized signaling pathways triggered by T. cruzi- derived GPI anchors, which lead to the synthesis of proinflammatory cytokines in macrophages. Fi- nally, we discuss the implications of these findings in resistance and pathogenesis during the infection with T. cruzi. J. Leukoc. Biol. 70: 467-477; 2001.

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Journal ArticleDOI

Pathogen Recognition and Inflammatory Signaling in Innate Immune Defenses

TL;DR: This review presents current knowledge on pathogen recognition through different families of PRRs and the increasingly complex signaling pathways responsible for activation of an inflammatory and antimicrobial response and medical implications are discussed.
Journal ArticleDOI

The Role of TLR2 in Infection and Immunity

TL;DR: This review will discuss the current status of TLR2 mediated immune responses by recognition of pathogen-associated molecular patterns (PAMPS) on these organisms and emphasis on whether the inflammation induced by these responses contributes to the disease state or to protection from diseases.
Journal ArticleDOI

Induction of Proinflammatory Responses in Macrophages by the Glycosylphosphatidylinositols of Plasmodium falciparum CELL SIGNALING RECEPTORS, GLYCOSYLPHOSPHATIDYLINOSITOL (GPI) STRUCTURAL REQUIREMENT, AND REGULATION OF GPI ACTIVITY

TL;DR: The receptors for P. falciparum GPI-induced cell signaling that leads to proinflammatory responses are identified, and the GPI structure-activity relationship is studied, implying that macrophage surface phospholipases play important roles in the G PI-induced innate immune responses and malaria pathogenesis.
Journal ArticleDOI

Protozoan encounters with Toll-like receptor signalling pathways: implications for host parasitism

TL;DR: Recent insights are described into how parasitic protozoans are sensed by TLR molecules, and how the TLR system itself can be targeted by these microbial pathogens for their own survival.
Journal ArticleDOI

MyD88 is essential for clearance of Leishmania major: possible role for lipophosphoglycan and Toll‐like receptor 2 signaling

TL;DR: It is observed that mice lacking the Toll‐like receptor (TLR) pathway adaptor protein MyD88 were more susceptible to infection with Leishmania major than wild‐type C57BL/6 mice, demonstrating a central role for this innate immune recognition pathway in control of infection, and suggesting that L. major possesses a ligand for TLR.
References
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Book

Escherichia coli and Salmonella :cellular and molecular biology

TL;DR: The Enteric Bacterial Cell and the Age of Bacteria Variations on a Theme by Escherichia is described.
Journal ArticleDOI

A human homologue of the Drosophila Toll protein signals activation of adaptive immunity

TL;DR: The cloning and characterization of a human homologue of the Drosophila toll protein (Toll) is reported, which has been shown to induce the innate immune response in adult Dosophila.
Journal ArticleDOI

Toll-like receptors in the induction of the innate immune response

TL;DR: A group of proteins that comprise the Toll or Toll-like family of receptors perform this role in vertebrate and invertebrate organisms and it is therefore not surprising that studies of the mechanism by which they act has revealed new and important insights into host defence.
Journal ArticleDOI

Phylogenetic Perspectives in Innate Immunity

TL;DR: In addition to its role in the early phase of defense, innate immunity in mammals appears to play a key role in stimulating the subsequent, clonal response of adaptive immunity.
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