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2015 ; 126
(21
): 2366-9
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The novel mechanism of lenalidomide activity
#MMPMID26438514
Fink EC
; Ebert BL
Blood
2015[Nov]; 126
(21
): 2366-9
PMID26438514
show ga
Lenalidomide acts by a novel drug mechanism-modulation of the substrate
specificity of the CRL4(CRBN) E3 ubiquitin ligase. In multiple myeloma,
lenalidomide induces the ubiquitination of IKZF1 and IKZF3 by CRL4(CRBN).
Subsequent proteasomal degradation of these transcription factors kills multiple
myeloma cells. In del(5q) myelodysplastic syndrome, lenalidomide induces the
degradation of CK1?, which preferentially affects del(5q) cells because they
express this gene at haploinsufficient levels. In the future, modulation of
ubiquitin ligase function may enable us to target previously "undruggable"
proteins.