Abstract |
Adriamycin (ADR) is an anti- cancer drug which offers improvement in survival for acute myeloid leukemia (AML) patients. However, the drug resistance is almost inevitable. Increasing evidences suggested that microRNAs ( miRNAs) were associated with cancer chemo-resistance. Here, we aimed to explore the possible mechanism of miR-103 affected resistance to ADR in AML cells. Different concentrations of ADR were used to induce K562 and KASUMI-1 cells, and miR-103 mimic, inhibitor were transfected into K562 and KASUMI-1 cells. Cell viability and proliferation were determined by trypan blue staining and MTT assays for evaluating K562 and KASUMI-1 cells drug resistance. The relationship of miR-103 and COP1, Trib1, and C/EBPα were analyzed by qRT-PCR and Western blot. Cell proliferation, viability were detected again. Besides, the expressions of main factors of cell cycle and PI3K/AKT signal pathway were analyzed by Western blot. Results showed that ADR inhibited cell viability and proliferation in K562 and KASUMI-1 cells. However, K562 and KASUMI-1 cells appeared drug resistance for 50 passages at 0.8 µM of ADR. In addition, miR-103 expression was up-regulated in ADR-resistant K562 cells (K562/ADR) and overexpression of miR-103 increased K562 cells drug resistance via promoting cell viability and cell cycle-related factors expressions. COP1 was positively regulated by miR-103, suppression of miR-103 recovered K562/ADR cells drug resistance by regulation of COP1, Trib1, and C/EBPα. Besides, miR-103 blocked PI3K/AKT signal pathway by regulation of COP1. These data indicated that miR-103 was up-regulated in drug resistant cells and it may regulate ADR-resistance by regulation of COP1 in AML cells.
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Authors | Lin Wan, Yanlong Tian, Rui Zhang, Zhuo Peng, Jiangli Sun, Wanggang Zhang |
Journal | Journal of cellular biochemistry
(J Cell Biochem)
Vol. 119
Issue 5
Pg. 3843-3852
(05 2018)
ISSN: 1097-4644 [Electronic] United States |
PMID | 29058777
(Publication Type: Journal Article, Retracted Publication)
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Copyright | © 2017 Wiley Periodicals, Inc. |
Chemical References |
- MIRN103 microRNA, human
- MicroRNAs
- Neoplasm Proteins
- RNA, Neoplasm
- Doxorubicin
- COP1 protein, human
- Ubiquitin-Protein Ligases
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Topics |
- Doxorubicin
(pharmacology)
- Drug Resistance, Neoplasm
(drug effects)
- Gene Expression Regulation, Enzymologic
(drug effects)
- Gene Expression Regulation, Leukemic
(drug effects)
- Humans
- K562 Cells
- Leukemia, Myeloid, Acute
(drug therapy, genetics, metabolism, pathology)
- MicroRNAs
(genetics, metabolism)
- Neoplasm Proteins
(biosynthesis, genetics)
- RNA, Neoplasm
(genetics, metabolism)
- Ubiquitin-Protein Ligases
(biosynthesis, genetics)
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