Bacterial interactions with cells of the intestinal mucosa: Toll-like receptors and NOD2.

P-184: The Role of Cell Surface Toll Like Receptors in Endometriosis

Background: Toll like receptors (TLRs) are a major family of innate immune systems which recognize specific pathogen associated molecular patterns (PAMPS)in bacterial, fungi, virus and parasites. Human TLRs comprise a large family of 10 different type proteins that are expressed on various immune cells. Among these receptors, TLR1, 2, 4, 5, 6 and 10 were expressed on the cell surface. TLR2 form...

Toll-Like Receptors Expression in Follicular Cells of Patients with Poor Ovarian Response

The Efficacy of Toll-Like Receptors in Awakening Dendritic Cell/Natural Killer Cell System for Eradication of Tumors

Natural killer (NK) cells are effector cells of the innate immune system that exert direct cytotoxic functions. Ubiquitously-expressed toll-like receptors (TLRs) have been recognized as one of the major components promoting dendritic cell (DC) maturation, which may induce polarized immune responses beneficial to cancer immunotherapy. TLR-activated NK cells and DCs are prerequisite for robust ac...

Mediators and Outcomes of Bacteria-epithelial Cell Interactions

Intestinal mucosal surfaces are in continuous contact with heterogeneous populations of commensal microorganisms, which collectively make up the intestinal microbiota. Historically, the barrier function of intestinal epithelial cells (IEC) has been considered to be important in preventing or limiting the interaction of non-invasive bacteria from making contact with, and activating the mucosal i...

Immuno-inhibitory PD-L1 can be induced by a peptidoglycan/NOD2 mediated pathway in primary monocytic cells and is deficient in Crohn's patients with homozygous NOD2 mutations.

Peptidoglycan (PGN) is a ubiquitous bacterial membrane product that, despite its well known pro-inflammatory properties, has also been invoked in immuno-tolerance of the gastrointestinal tract. PGN-induced mucosal IL-10 secretion and downregulation of Toll like receptors are potential mechanisms of action in the gut but there are few data on tolerogenic adaptive immune responses and PGN. Here, ...