Abstract：
BACKGROUND:Recently, copy number alteration (CNA) of 9p24.1 were demonstrated in 10% of diffuse large b-cell lymphoma (DLBCL), with gene expression and mutation profiles that were similar to those of primary mediastinal large B-cell lymphoma (PMBCL). However, their CNA-based profile and clinical impact still remain unclear. METHODS:Multiplex ligation-dependent probe amplification were employed to investigate the prevalence of JAK2/PD-L2 amplification in DLBCL and their CNA-based pattern of driver genes. The clinical outcome and characteristics were also analyzed. RESULTS:Using unsupervised hierarchical clustering, a small group of DLBCL (10.5%, 8/76) was clustered together with PMBCL as Cluster_2, demonstrating amplification of JAK2 (100%,8/8) and PD-L2 (75.0%,6/8). This subgroups of DLBCL demonstrated significant higher expression of PD-L1 than those with MYD88 L265P mutation(p = 0.024). And they exhibited dismal OS and PFS as compared with DLBCL_others(p = 0.003 and 0.001, respectively), which is similar to DLBCL with MYD88 L265P mutation. CONCLUSIONS:DLBCL with amplification of JAK2/PD-L2 exhibits CNA pattern that is similar to PMBCL, and demonstrates unfavorable clinical outcome that resembles those with MYD88 L265P mutation. It is essential to identify this subgroup of DLBCL who may acquire more benefits from the JAK2 and PD-L1 signaling inhibition.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Xue X,Huang W,Qiu T,Guo L,Ying J,Lv Ndoi
10.1186/s12885-020-07293-3subject
Has Abstractpub_date
2020-08-27 00:00:00pages
816issue
1issn
1471-2407pii
10.1186/s12885-020-07293-3journal_volume
20pub_type
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