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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Endoplasmic reticulum stress activates cleavage of CREBH to induce a systemic inflammatory response.

Regulated intramembrane proteolysis (RIP) of endoplasmic reticulum (ER) membrane-anchored transcription factors is known to maintain sterol homeostasis and to mediate the unfolded protein response (UPR). Here, we identified CREBH as a RIP-regulated liver-specific transcription factor that is cleaved upon ER stress and required to activate expression of acute phase response (APR) genes. Proinflammatory cytokines increase expression of ER membrane-anchored CREBH. In response to ER stress, CREBH is cleaved by site-1 and site-2 proteases to liberate an amino-terminal fragment that transits to the nucleus to activate transcription of the genes encoding serum amyloid P-component (SAP) and C-reactive protein ( CRP). Proinflammatory cytokines and lipopolysaccharide activate the UPR and induce cleavage of CREBH in the liver in vivo. Together, our studies delineate a molecular mechanism for activation of an ER-localized transcription factor, CREBH, and reveal an unprecedented link by which ER stress initiates an acute inflammatory response.[1]

References

  1. Endoplasmic reticulum stress activates cleavage of CREBH to induce a systemic inflammatory response. Zhang, K., Shen, X., Wu, J., Sakaki, K., Saunders, T., Rutkowski, D.T., Back, S.H., Kaufman, R.J. Cell (2006) [Pubmed]
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