Systematic analysis of the frequently amplified 2p15-p16.1 locus reveals PAPOLG as a potential proto-oncogene in follicular and transformed follicular lymphoma

Authors : Deniz KURŞUN, Can KÜÇÜK

Pages : 124-132

View : 16 | Download : 9

Publication Date : 2019-12-01

Article Type : Research Paper

Abstract :Transformed follicular lymphoma insert ignore into journalissuearticles values(tFL); originates from histological transformation of follicular lymphoma insert ignore into journalissuearticles values(FL);, which is the most common indolent non-Hodgkin lymphoma. High-resolution genomic copy-number analysis previously identified frequent amplification of the 2p15-p16.1 locus in FL and tFL cases. The genes insert ignore into journalissuearticles values(i.e. BCL11A, PAPOLG, PUS10, and USP34); in this amplified locus have not been systematically investigated to date in terms of their role in FL pathogenesis or transformation to tFL. Here we investigated the relationship between amplification and expression of genes in 2p15-p16.1 as well as their expression after histological transformation. NCBI GEO SNP array and gene expression profile insert ignore into journalissuearticles values(GEP); data of tFL cases were analyzed to evaluate the relationship between amplification and mRNA expression. Moreover, transcript levels of these four genes in FL cases were compared with those of patient-matched tFL cases and normal B-cells. Amplification of the 2p15-p16.1 locus is associated with increased transcription of BCL11A and PAPOLG in tFL cases, of which the latter showed increased expression after histological transformation. Compared with the level in normal B-cells, PAPOLG was significantly overexpressed in FL cases, but expression levels of the other three genes did not show any significant difference. Altogether these results suggest that PAPOLG may be the most critical gene in terms of transformation to tFL.
Keywords : Amplification, 2p15 16 1, BCL11A, PAPOLG, PUS10, USP34, proto oncogene, tFL