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. 2018 Mar 30;13(3):e0195335. doi: 10.1371/journal.pone.0195335

Fig 6. Proposed model of enhanced activation by HMGB1/IL-1β complexes.

Fig 6

(A) Schematic illustrating secretion of HMGB1 and IL-1 after burn injury. HMGB1 translocates from the nucleus to the cytoplasm where it is packaged in vesicles. HMGB1 and IL-1β were increased in plasma MVs after burn injury. HMGB1/IL-1β complexes caused enhanced increases in IL-6 and IFNβ gene induction in human THP-1 monocytes. (B) Hypothetical models of enhanced immune activation by HMGB1/pro-IL-1β and HMGB1/cleaved-IL-1β complexes. Pro-IL-1β is considered inactive at the IL-1 receptor. When coupled with HMGB1, pro-IL-1β caused enhanced immune activation in a manner similar to HMGB1/cleaved IL-1β complexes.