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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Leukemia
2018 ; 32
(4
): 996-1002
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Protein arginine methyltransferase 5 has prognostic relevance and is a druggable
target in multiple myeloma
#MMPMID29158558
Gullà A
; Hideshima T
; Bianchi G
; Fulciniti M
; Kemal Samur M
; Qi J
; Tai YT
; Harada T
; Morelli E
; Amodio N
; Carrasco R
; Tagliaferri P
; Munshi NC
; Tassone P
; Anderson KC
Leukemia
2018[Apr]; 32
(4
): 996-1002
PMID29158558
show ga
Arginine methyltransferases critically regulate cellular homeostasis by
modulating the functional outcome of their substrates. The protein arginine
methyltransferase 5 (PRMT5) is an enzyme involved in growth and survival pathways
promoting tumorigenesis. However, little is known about the biologic function of
PRMT5 and its therapeutic potential in multiple myeloma (MM). In the present
study, we identified and validated PRMT5 as a new therapeutic target in MM. PRMT5
is overexpressed in patient MM cells and associated with decreased
progression-free survival and overall survival. Either genetic knockdown or
pharmacological inhibition of PRMT5 with the inhibitor EPZ015666 significantly
inhibited growth of both cell lines and patient MM cells. Furthermore, PRMT5
inhibition abrogated NF-?B signaling. Interestingly, mass spectrometry identified
a tripartite motif-containing protein 21 TRIM21 as a new PRMT5-partner, and we
delineated a TRIM21-dependent mechanism of NF-?B inhibition. Importantly, oral
administration of EPZ015666 significantly decreased MM growth in a humanized
murine model of MM. These data both demonstrate the oncogenic role and prognostic
relevance of PRMT5 in MM pathogenesis, and provide the rationale for novel
therapies targeting PRMT5 to improve patient outcome.