Where is HMGB1?

The presence of HMGB1 in the nucleus depends on posttranslational modifications. When the protein is not acetylated, it stays in the nucleus, but hyperacetylation on lysine residues causes it to translocate into the cytosol.

Is HMGB1 a transcription factor?

The HMGB1 Protein All of these proteins are so-called “architectural transcription factors” because they act by binding the DNA in a structure-dependent manner, and modify transcriptional regulation and chromatin structure [2].

Is HMGB1 a damp?

HMGB1 is a redox-sensitive DAMP. In the nucleus, fully reduced HMGB1 acts as a DNA chaperone and contributes to gene transcription and DNA repair.

What is the difference between Necroptosis and pyroptosis?

Pyroptosis shares some similarities to necroptosis, but while necroptosis is thought to be a secondary cell death response to situations where apoptosis is inhibited, pyroptosis is generally a primary response to infectious organisms.

Why are DAMPs important?

Finally, some plasma proteins, including SAA, fibrinogen, Gc-globulin, α1-microglobulin, and α2-macroglobulin, are extravasated to the sites of inflammation from the vasculature and function as DAMPs by stimulating macrophages to produce inflammatory cytokines through TLR2 or TLR4 (12,13,14,15).

What is a feature shared between pyroptosis and necroptosis?

Pyroptotic and necroptotic death pathways both allow the release of immunogenic cellular content (DAMPs), which have been suggested as direct activators of PRRs and immune cells that can trigger inflammatory responses (Table 1).