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2017 ; 8
(19
): 31305-31317
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Association of the long non-coding RNA MALAT1 with the polycomb repressive
complex pathway in T and NK cell lymphoma
#MMPMID28412742
Kim SH
; Kim SH
; Yang WI
; Kim SJ
; Yoon SO
Oncotarget
2017[May]; 8
(19
): 31305-31317
PMID28412742
show ga
Recently, various long non-coding RNAs (lncRNAs) have been reported to have
significant therapeutic or prognostic value. However, the expression of lncRNAs
has not been investigated in T and NK cell lymphoma. Thus, we evaluated the
biological and prognostic role of lncRNAs related to the polycomb repressive
complex (PRC) and PRC markers in tissue samples and cell lines of T and NK cell
lymphoma. Among the tested lncRNAs, MALAT1 was most highly expressed in clinical
samples and cell lines. High expression of MALAT1 as well as BMI1 was related to
poor prognosis in patients with mature T cell lymphoma. In the tissue samples,
BMI1 expression showed a positive correlation with EZH2, SUZ12, H3K27me3, and
MALAT1. Multiple linear regression analysis showed that BMI1 expression was
independently associated with H3K27me3. Direct binding of MALAT1 to the PRC2
components (EZH2 and SUZ12) was observed in a T cell lymphoma cell line; however,
no direct binding of MALAT1 with H3K27me3 and BMI1 (a PRC1 component) was
observed.In T and NK cell lymphomas, MALAT1 was related to poor prognosis. MALAT1
directly binds to EZH2 and SUZ12, and BMI1 activation may be induced possibly
through H3K27me3.