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Figure 2 | BMC Medicine

Figure 2

From: The Hyperferritinemic Syndrome: macrophage activation syndrome, Still’s disease, septic shock and catastrophic antiphospholipid syndrome

Figure 2

Control of ferritin expression. The expression of ferritin is regulated at both the transcriptional and post-transcriptional levels by iron, cytokine release, chemokine production, lipopolysaccharide, prostaglandins, hormones, growth factors, second messengers, hyperoxia and hypoxia, and oxidative stress [5]. Cytokines may also affect ferritin translation indirectly through their ability to induce nitric oxide synthase and, hence, increase nitric oxide (NO) (Figure 2) [11, 12]. NO, in turn, causes inhibition of ferritin translation. Complex feedback mechanisms between ferritin and cytokines in the control of pro-inflammatory and anti-inflammatory mediators: cytokines can induce ferritin expression; otherwise, ferritin can induce the expression of pro- and anti-inflammatory cytokines.

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