Rui YANG, Jing NING, Lijuan JING, et al. MiRNA-495 regulates proliferation and apoptosis of acute myeloid leukemia cells with MLL gene rearrangement by targeting STYX[J]. Journal of Third Military Medical University, 2021, 43(22): 2407-2413.
DOI:
Rui YANG, Jing NING, Lijuan JING, et al. MiRNA-495 regulates proliferation and apoptosis of acute myeloid leukemia cells with MLL gene rearrangement by targeting STYX[J]. Journal of Third Military Medical University, 2021, 43(22): 2407-2413. DOI: 10.16016/j.1000-5404.202105091.
MiRNA-495 regulates proliferation and apoptosis of acute myeloid leukemia cells with MLL gene rearrangement by targeting STYX
To investigate the effect of miRNA-495 on the proliferation and apoptosis of acute myeloid leukemia (AML) cells with mixed lineage leukemia (MLL) gene rearrangement.
Methods
2
Ten patients diagnosed with AML with MLL-AF9 fusion gene positive (6 males
4 females
mean age of 39.37±2.71 years)
and 10 cases of AML (5 males
5 females
mean age of 41.12±1.92 years) admitted in our hospital from August 2017 to May 2019 were enrolled in this study
and another 10 patients (6 males
4 females
mean age of 42.31±3.21 years) who attended the surgical outpatient department during the same period were also collected as the control. THP-1 cells (containing MLL-AF9 fusion gene) were divided into miRNA-495 and control groups based on transfection with miRNA-495 or not
and the expression of miRNA-495 in each group was detected by RT-qPCR; CCK-8 assay was used to determine the proliferation of transfected THP-1 cells in each group; RT-qPCR and Western blotting were performed to measure the expression of proliferation-related factors (Ki-67 and PCNA) and apoptosis-related factors (Bcl-2
Bax and Caspase-3). The target genes of miRNA-495 were predicted by TargetScan and then verified by dual-luciferase reporter assay. Finally
RT-qPCR and Western blotting were adopted to detect the expression of serine/threonine/tyrosine interacting protein (STYX) in groups as follows: miRNA-495 group
control group
STYX group (transfected with STYX) and miRNA-495+STYX group (transfected with miRNA-495 and STYX).
Results
2
MiRNA-495 expression was down-regulated in AML patients with MLL-AF9 fusion gene
with relative expression of 0.25±0.08 (95%
CI
=-0.86~-0.65
P
<
0.001); miRNA-495 inhibited cell proliferation (
P
<
0.001) and induced apoptosis of THP-1 cells
and it targetedly bound to STYX (
P
<
0.001). In addition
STYX overexpression reversed the effects of miRNA-495 on THP-1 cell proliferation and apoptosis.
Conclusion
2
MiRNA-495 regulates the proliferation and apoptosis of AML cells with MLL gene rearrangement by targeting STYX.
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