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The role of the polycomb repressive complex pathway in T and NK cell lymphoma: biological and prognostic implications

Title
 The role of the polycomb repressive complex pathway in T and NK cell lymphoma: biological and prognostic implications 
Authors
 Soo Hee Kim ; Woo Ick Yang ; Sun Och Yoon ; Young Hyeh Ko ; Yoo Hong Min 
Issue Date
2015
Journal Title
 Tumor Biology 
ISSN
 1010-4283 
Citation
 Tumor Biology, Vol.null(null) : null, 2015 
Abstract
Polycomb repressive complex 2 (PRC2; formed by EZH2, SUZ12, and EED protein subunits) and PRC1 (BMI1 protein) induce gene silencing through histone modification, primarily H3K27me3, and deregulation of PRC pathways leads to tumorigenesis. In the present study, activation of PRC2, H3K27me3, and BMI1 was investigated by immunohistochemistry in 175 cases of T and natural killer (NK) cell lymphoma. Activation of PRC proteins was analyzed according to c-MYC activation, Epstein-Barr virus (EBV) infection, CD30 activation, and survival. Among all T and NK cell lymphomas, high expression rates of 54.7 % for EZH2, 33.3 % for SUZ12, 85.7 % for EED, 40.5 % for H3K27me3, and 30.9 % for BMI1 were discovered. Activation of PRC2, H3K27me3, and BMI1 showed positive correlations (P < 0.05). Activation of c-MYC was associated with activation of SUZ12 and triple coactivation of all PRC2 protein subunits (EZH2high/SUZ12high/EEDhigh) (P < 0.05). In EBV-positive tumors, activation of EZH2 and H3K27me3 showed greater association (P < 0.05). H3K27me3 and BMI1 showed a negative association in tumors expressing CD30 (P < 0.05). With respect to survival, BMI1 activation was independently associated with poor prognosis in T and NK cell lymphomas (P = 0.002). In conclusion, T and NK cell lymphomas were associated with activation of PRC pathway markers, for which c-MYC activation and EBV infection could be suggested as possible causes. PRC pathway markers may be potential therapeutic targets and prognostic markers in T and NK cell lymphoma.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/141860
DOI
10.1007/s13277-015-3977-y
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Internal Medicine
1. 연구논문 > 1. College of Medicine > Dept. of Pathology
Yonsei Authors
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Link
 http://link.springer.com/article/10.1007%2Fs13277-015-3977-y
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