Friday, March 30, 2012

The introduction of Adjuvant Peptides


Fragments of bacterial cell wall peptidoglycan, murein, have long been known to have potent adjuvant properties. Synthetic versions of these molecules and murein-derived components are known as adjuvant Peptides.Johannsen L et al., In 1989 describes the properties of small cell wall monomers (muramyl peptides) that cause a number of short-term effects in vivo and in vitro .

The most studied of these molecules was muramyl dipeptide (adjuvant peptide, N-acetyl-muramyl-L-alanine-D-isoglutamine [MDP]), the minimum active subunit of bacterial peptidoglycan. However, other muramyl peptides that contain 1,6-anhydromuramyl residues were reported to have greater potency as an adjuvant peptides. The acute effects of muramyl peptides include rupture of the blood-aqueous humor, arthritis, cytotoxicity and slow wave sleep. That the monomers of the cell wall can cause sleep has attracted great interest because it explains a major side effect of infection apathy. More controversial has been suggested that muramyl peptides play a role in the sleep of healthy people 1,2,3.
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