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2015 ; 12
(11
): 1842-52
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Off-Target V(D)J Recombination Drives Lymphomagenesis and Is Escalated by Loss of
the Rag2 C Terminus
#MMPMID26365182
Miju?kovi? M
; Chou YF
; Gigi V
; Lindsay CR
; Shestova O
; Lewis SM
; Roth DB
Cell Rep
2015[Sep]; 12
(11
): 1842-52
PMID26365182
show ga
Genome-wide analysis of thymic lymphomas from Tp53(-/-) mice with wild-type or
C-terminally truncated Rag2 revealed numerous off-target, RAG-mediated DNA
rearrangements. A significantly higher fraction of these errors mutated known and
suspected oncogenes/tumor suppressor genes than did sporadic rearrangements (p <
0.0001). This tractable mouse model recapitulates recent findings in human pre-B
ALL and allows comparison of wild-type and mutant RAG2. Recurrent, RAG-mediated
deletions affected Notch1, Pten, Ikzf1, Jak1, Phlda1, Trat1, and Agpat9. Rag2
truncation substantially increased the frequency of off-target V(D)J
recombination. The data suggest that interactions between Rag2 and a specific
chromatin modification, H3K4me3, support V(D)J recombination fidelity. Oncogenic
effects of off-target rearrangements created by this highly regulated recombinase
may need to be considered in design of site-specific nucleases engineered for
genome modification.