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2018 ; 10
(ä): 47
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H19 overexpression promotes leukemogenesis and predicts unfavorable prognosis in
acute myeloid leukemia
#MMPMID29643943
Zhang TJ
; Zhou JD
; Zhang W
; Lin J
; Ma JC
; Wen XM
; Yuan Q
; Li XX
; Xu ZJ
; Qian J
Clin Epigenetics
2018[]; 10
(ä): 47
PMID29643943
show ga
BACKGROUND: The long non-coding RNA H19 plays a crucial role in solid tumor
initiation and progression. However, the potential role of H19 and its clinical
significance in acute myeloid leukemia (AML) remain largely elusive. METHODS: H19
expression was detected by qPCR, and clinical significance in AML patients was
further analyzed. The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus
(GEO) data for AML were used as validation cohorts. The roles of H19 in cell
proliferation and apoptosis were determined by cell proliferation assay and flow
cytometry analysis. RESULTS: H19 expression was significantly increased in AML
patients but not associated with embedded miR-675 expression. Moreover, H19
overexpression was not dependent on the methylation pattern in H19 differentially
methylated region/imprinting control region. Strong association was observed
between H19 overexpression and patients' characteristics including sex, higher
white blood cells, older age, and intermediate karyotype, FLT3-ITD, and DNMT3A
mutations. In addition, H19 overexpression correlated with lower complete
remission (CR) rate and shorter overall survival, and further confirmed by
multivariate analyses. Importantly, the prognostic effect of H19 expression was
validated by TCGA and GEO data. In the follow-up of patients, H19 expression in
CR phase was lower than diagnosis time and returned at relapse time.
Loss-of-function experiments showed that H19 exhibited anti-proliferative and
pro-apoptotic effects in leukemic cell HL60. Furthermore, H19 expression was
positively correlated with potential downstream gene ID2 in AML. CONCLUSIONS: Our
findings revealed that methylation-independent H19 was a prognostic and
predictive biomarker in AML, and H19/ID2 played crucial roles in leukemogenesis
with potential therapeutic target value.