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Open AccessJournal ArticleDOI

Muramyl dipeptide and its derivatives: peptide adjuvant in immunological disorders and cancer therapy.

Chikako Ogawa, +2 more
- 01 Sep 2011 - 
- Vol. 7, Iss: 3, pp 180-197
TLDR
The structural modifications of MDP and its derivatives have been extensively studied in an attempt to increase adjuvant activity and boost the immune response effectively for clinical use in the treatment of cancer and other diseases.
Abstract
Muramyl dipeptide (MDP) is a synthetic immunoreactive peptide consisting of N-acetyl muramic acid attached to a short amino acid chain of L-Ala-D-isoGln. It was first identified in bacterial cell wall peptidoglycan as an active component in Freund's complete adjuvant. In the cell, MDP is detected by NOD2, a cytoplasmic receptor belonging to the human innate immune system. NOD2 mutations are frequently observed in patients with Crohn's disease, an autoimmune disorder, suggesting the significance of the MDP-NOD2 pathway in activating immunity. For this reason, structural modifications of MDP and its derivatives have been extensively studied in an attempt to increase adjuvant activity and boost the immune response effectively for clinical use in the treatment of cancer and other diseases. This review summarizes the synthetic chemistry of MDP and its derivatives and discusses their pharmacological action and stereoselective synthesis.

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Citations
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Proteasomal degradation of Nod2 protein mediates tolerance to bacterial cell wall components.

TL;DR: It is shown that activation of Nod2 by its ligand, muramyl dipeptide in the bacterial cell wall, induces rapid degradation of NOD2, which confers MDP tolerance in vitro and in vivo, which indicates that TLRs and NLRs induce a tolerant state through distinct molecular mechanisms that protect the host from septic shock.
References
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Journal ArticleDOI

Regulation of IL-8 and IL-1β expression in Crohn's disease associated NOD2/CARD15 mutations

TL;DR: It is suggested that a signaling defect of innate immunity to MDP may be an essential underlying defect in the pathogenesis of some CD patients, and post-transcriptional dependency on the NOD2/CARD15 pathway for IL-1beta secretion with MDP and TNFalpha treatment is demonstrated.
Journal ArticleDOI

Role of Nod2 in the Response of Macrophages to Toll-Like Receptor Agonists

TL;DR: The results argue that Nod2 does not play an essential, nonredundant role in the response of macrophages to bacterial products but rather plays unexpected roles in regulating systemic responses to pathogens.
Journal ArticleDOI

The pyrin domain: a possible member of the death domain-fold family implicated in apoptosis and inflammation.

TL;DR: This paper presents a meta-analyses of the HIT database that shows clear trends in the number of hits over time and in the severity of the crashes that occur after a single event.
Journal ArticleDOI

Membrane recruitment of NOD2 in intestinal epithelial cells is essential for nuclear factor-ΚB activation in muramyl dipeptide recognition

TL;DR: In this paper, the authors performed a functional analysis of deletion and substitution NOD2 mutants, but not NOD 2 3020insC mutant, associated with cell surface membranes of intestinal epithelial cells.
Journal ArticleDOI

The NOD: a signaling module that regulates apoptosis and host defense against pathogens.

TL;DR: Nods activate, through the NOD module, diverse signaling pathways involved in the elimination of cells via PCD and the host defense against pathogens.
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