Therefore, the secondary signals that are required to activate DC function are induced by danger molecular pattern proteins, such as calreticulin, HSPs, and the HMGB1 [ 39]. mEHT provides danger molecular pattern proteins and induces inflammatory signals in tumor microenvironments [ 28].
The most enriched proteins released were the nucleosomal histones, which have previously been identified as damage-associated molecular pattern proteins (DAMPs) that can initiate sterile inflammatory responses.
The initiation of the inflammatory process has been ascribed to the action of alarmins that include damage-associated molecular pattern proteins (DAMPs), cytokines and metabolites (Gallucci and Matzinger, 2001; Bianchi, 2007).
Damage-associated molecular pattern proteins are recognised by various receptor systems, including Toll-like receptors (TLRs), Nod-like receptors, receptor for advanced glycation end products and other scavenger receptors, and are considered to trigger signalling.
The multi-protein inflammasome complex, comprising the NLRP3 polypeptide, ASC or PYCARD (apoptosis-associated speck-like protein containing a CARD) and caspase-1 [ 12] forms when monocytes and macrophages encounter damaged and pathogen-associated molecular pattern proteins (DAMPs and PAMP; e.g., bacterial lipopolysaccharide or MSU crystals) and leads to activation of caspase-1.
High mobility group box-1 (HMGB1), a typical damage-associated molecular pattern (DAMP) protein, is associated with inflammatory conditions and tissue damage.
In recent years, a novel role of HMGB1 as a typical damage-associated molecular pattern (DAMP) protein when placed extracellularly has been attracting increasing attention [ 10].
Our previous studies showed that HMGB1 LPS complex directly induced experimental synovitis in DBA/1 mice and that HMGB1 is a well-verified adjuvant-like damage-associated molecular pattern (DAMP) protein.
Endogenous Damage Associated Molecular Pattern (DAMP) proteins are known as important pro-inflammatory factors of the immune system, which are released during cellular stress.
