期刊
LEUKEMIA & LYMPHOMA
卷 51, 期 4, 页码 694-701出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/10428191003596835
关键词
MicroRNA-21; antisense oligonucleotide; K562 cells; leukemia; migration; apoptosis; growth; PDCD4
资金
- Natural Science Foundation of Guangdong province [5300488]
- Guangdong Administration of Traditional Chinese Medicine Research [2008098]
- Science and Technology Plan Projects of Guangdong province [2006B35502010, 2005B33101005]
- National Natural Science Foundation of China [30800486]
MicroRNAs (miRNAs) are small non-coding RNA molecules that are widely involved in cancer-related processes. The microRNA-21 (miR-21) has been identified as the only miRNA overexpressed in a variety of cancers, including leukemia. However, the function of miR-21 is yet unknown in chronic myelogenous leukemia (CML). Antisense oligonucleotides (ASOs), as inhibitors of miRNAs, have already been applied to therapeutic development and functional identification in miRNA research. In this study, we found that the antisense inhibition of miR-21 in K562 cells suppressed cell migration, promoted cell apoptosis, and inhibited cell growth, and up-regulated the expression of the tumor suppressor gene PDCD4. Meanwhile, pre-miRNA-21 increased migration and decreased cell apoptosis without affecting proliferation. We also validated that PDCD4 is a functional target of miR-21 in K562 cells. These effects of miR-21 might be partially due to its regulation of PDCD4. Our data suggest that miR-21 may play an oncogenic role in the cellular processes of CML, and antisense inhibition of miR-21 may therefore be useful as CML therapy.
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