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

Bruton's tyrosine kinase targets NF-kappaB to the bcl-x promoter via a mechanism involving phospholipase C-gamma2 following B cell antigen receptor engagement.

Disruption of Bruton's tyrosine kinase (BTK) function leads to x- linked immunodeficiency (xid) in mice. BTK-deficient (btk(-/-)) B cells are defective for survival. Prior studies show that BTK is required for the induction of Bcl-x(L) following B cell antigen receptor (BCR) engagement. However, the mechanism underlying Bcl-x(L) induction in response to BCR ligation remains unresolved. We now demonstrate that BTK regulates bcl-x expression by transcriptional control in response to BCR engagement. BTK targets nuclear factor-kappaB (NF-kappaB) to activate the bcl-x promoter via a phospholipase C-gamma2 (PLC-gamma2)-dependent mechanism. Perturbation of the BTK/PLC-gamma2/NF-kappaB signaling axis likely contributes to the defective expression of bcl-x and compromised survival of xid B cells.[1]

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