例如:"lncRNA", "apoptosis", "WRKY"

MiRNA-409-5p dysregulation promotes imatinib resistance and disease progression in children with chronic myeloid leukemia.

Eur Rev Med Pharmacol Sci. 2019 Oct;23(19):8468-8475. doi:10.26355/eurrev_201910_19159
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摘要


OBJECTIVE:To elucidate the role of miRNA-409-5p in the pathogenesis of child chronic myeloid leukemia (CML) and its potential mechanism. PATIENTS AND METHODS:Expression levels of miRNA-409-5p and NUP43 in peripheral blood of CML children and healthy controls were detected by quantitative real-time polymerase chain reaction (qRT-PCR). Cell counting kit-8 (CCK-8) and flow cytometry were conducted to evaluate the regulatory effect of miRNA-409-5p on proliferative potential and cell cycle progression of CML cells. Protein levels of PCNA, c-Myc, and cyclin D1 in CML were examined by Western blot. Dual-luciferase reporter gene assay verified the binding of target gene NUP43 to miRNA-409-5p. Finally, the potential effect of miRNA-409-5p on Imatinib resistance in CML was elucidated. RESULTS:Compared with healthy children, miRNA-409-5p expression in peripheral blood of CML children markedly decreased. Similarly, miRNA-409-5p expression was lower in CML cells. Contrary to the expression pattern of miRNA-409-5p, NUP43 was highly expressed in CML. The miRNA-409-5p overexpression remarkably inhibited proliferative potential and arrested cell cycle in the G0/G1 phase. Protein levels of PCNA, c-Myc, and cyclin D1 were downregulated in CML cells overexpressing miRNA-409-5p. The knockdown of miRNA-409-5p obtained the opposite trends. NUP43 was proved to be the target gene of miRNA-409-5p and negatively regulated by miRNA-409-5p. After overexpression of miRNA-409-5p, Imatinib treatment elevated proliferation inhibition and cell cycle arrest of K562 and KG-1a cells. CONCLUSIONS:MiRNA-409-5p is lowly expressed in child CML, which inhibits proliferative potential and cell cycle progression by upregulating NUP43 expression. In addition, miRNA-409-5p overexpression enhances Imatinib resistance in CML.

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