Smurf2 suppresses B-cell proliferation and lymphomagenesis by mediating ubiquitination and degradation of YY1
Department of Cell and Developmental Biology; Department of Microbiology and Physiological Systems
Cancer Biology | Cell Biology
About half of patients with diffuse large B-cell lymphoma (DLBCL) do not respond to or relapse soon after the standard chemotherapy, indicating a critical need to better understand the specific pathways perturbed in DLBCL for developing effective therapeutic approaches. Mice deficient in the E3 ubiquitin ligase Smurf2 spontaneously develop B-cell lymphomas that resemble human DLBCL with molecular features of germinal centre or post-germinal centre B cells. Here we show that Smurf2 mediates ubiquitination and degradation of YY1, a key germinal centre transcription factor. Smurf2 deficiency enhances YY1-mediated transactivation of c-Myc and B-cell proliferation. Furthermore, Smurf2 expression is significantly decreased in primary human DLBCL samples, and low levels of Smurf2 expression correlate with inferior survival in DLBCL patients. The Smurf2-YY1-c-Myc regulatory axis represents a novel pathway perturbed in DLBCL that suppresses B-cell proliferation and lymphomagenesis, suggesting pharmaceutical targeting of Smurf2 as a new therapeutic paradigm for DLBCL.
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Citation: Ramkumar C, Cui H, Kong Y, Jones SN, Gerstein RM, Zhang H. Smurf2 suppresses B-cell proliferation and lymphomagenesis by mediating ubiquitination and degradation of YY1. Nat Commun. 2013 Oct 14;4:2598. doi: 10.1038/ncomms3598. Link to article on publisher's website
Ramkumar, Charusheila; Cui, Hang; Kong, Yahui; Jones, Stephen N.; Gerstein, Rachel M.; and Zhang, Hong, "Smurf2 suppresses B-cell proliferation and lymphomagenesis by mediating ubiquitination and degradation of YY1" (2013). Zhang Lab Publications. 13.