Mycoplasma arthritidis-derived mitogen (MAM) is a member of the superantigen family that structurally differs from other members while still capable of initiating cognate APC/T cell interaction. In addition to the critical role of MHC class II molecules, it has been suggested that TLR2 and TLR4 may cooperate with MHC class II during MAM-induced responses. In this study, we investigated the dire...

Toll-like receptors (TLRs) are type I transmembrane proteins that are key regulators of both innate and adaptive immune responses. To protect the host from viral and bacterial threats, TLRs trigger a pro-inflammatory immune response by detecting pathogen and danger associated molecular patterns. Considerable evidence has accumulated to show that the dysregulation of TLR signaling contributes to...

Background: microRNAs (miRNAs) participate in innate immune responses. Results: MiR-92a decreases rapidly in macrophages once stimulated with TLR ligands, and miR-92a controls inflammatory response by targeting MKK4/JNK/C-JUN pathway. Conclusion: TLR-mediated miR-92a reduction feedback enhances TLR-triggered inflammatory response. Significance: Our findings reveal a novel positive feedback loop...

Abstract Macrophages play a variety of roles in immunity including both pro- and anti-inflammatory functions, which can be controlled by toll-like receptor (TLR) stimulation. Previously, we generated computational model interconnected TLR signaling cascades validated the using experimental data from THP-1 monocyte cell line. This project aimed to adapt provide insights into activation bone marr...

the toll like (family of receptors tlr) are expressed primarily by immune cells and are known to be part of innate immune system. in the past decade involvement of tlrs in several physiologic and pathologic pathways has been proved. pain transmission via glial activation is one of such interesting fields. both pathological pain states and treatment have also been shown to be related to tlr-rela...

In mice that fail to express the phagolysosomal endonuclease DNase II and the type I IFN receptor, excessive accrual of undegraded DNA results in a STING-dependent, TLR-independent inflammatory arthritis. These double-knockout (DKO) mice develop additional indications of systemic autoimmunity, including anti-nuclear autoantibodies and splenomegaly, that are not found in Unc93b1(3d/3d) DKO mice ...

TLRs provide critical signals to induce innate immune responses in APCs such as dendritic cells (DCs) that in turn link to adaptive immune responses. Results from our previous studies demonstrated that saturated fatty acids activate TLRs, whereas n-3 polyunsaturated fatty acids inhibit agonist-induced TLR activation. These results raise a significant question as to whether fatty acids different...

Pathogen-associated molecular patterns (PAMPs) signal through Toll-like receptors (TLRs) to activate immune responses, but prolonged exposure to PAMPs from Mycobacterium tuberculosis (MTB) and other pathogens inhibits class II MHC (MHC-II) expression and Ag processing, which may allow MTB to evade CD4(+) T cell immunity. Alternate class I MHC (MHC-I) processing allows macrophages to present Ags...

OBJECTIVES TLR-4 activates a number of inflammatory signaling pathways. Also, AMPK could be involved in anti-inflammatory signaling. The aim of this study was to identify whether stimulation of AMPK could inhibit LPS-induced Tlr-4 gene expression in mice hearts. MATERIALS AND METHODS Heart AMPK activity and/or Tlr-4 expression was stimulated in different mice groups, using respectively IP inj...