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Research Paper

miRNA-144 targeting DNAJC3-AS1 reverses the resistance of the breast cancer cell line Michigan Cancer Foundation-7 to doxorubicin

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Pages 9885-9892 | Received 17 Sep 2021, Accepted 22 Oct 2021, Published online: 11 Dec 2021

Figures & data

Figure 1. Expression of miR-144 and DNAJC3-AS1 in MCF-7 cells and MCF-7/DOX cells. (a) The relative cell viability was detected by MTT assay. (b) mRNA expression of miR-144 and DNAJC3-AS1 mRNA expression was detected. (c) The expression of DNAJC3-AS1, Atg5, LC3-II and LC3-I protein expression was detected. **P < 0.01vs. MCF-7 group

Figure 1. Expression of miR-144 and DNAJC3-AS1 in MCF-7 cells and MCF-7/DOX cells. (a) The relative cell viability was detected by MTT assay. (b) mRNA expression of miR-144 and DNAJC3-AS1 mRNA expression was detected. (c) The expression of DNAJC3-AS1, Atg5, LC3-II and LC3-I protein expression was detected. **P < 0.01vs. MCF-7 group

Figure 2. miR-144 overexpression improves the sensitivity and induces apoptosis of drug-resistant MCF-7 cells. (a) The expression of Mir-144 mRNA was detected. (b) Cell viability was detected by MTT. (c) The apoptosis of cells was evaluated by flow cytometry. **P < 0.01 vs. Control group

Figure 2. miR-144 overexpression improves the sensitivity and induces apoptosis of drug-resistant MCF-7 cells. (a) The expression of Mir-144 mRNA was detected. (b) Cell viability was detected by MTT. (c) The apoptosis of cells was evaluated by flow cytometry. **P < 0.01 vs. Control group

Figure 3. miR-144 targeted regulation of DNAJC3-AS1 expression to detect the sensitivity of drug-resistant MCF-7 cells. (a) Using TargetScan predict the binding sites of miR-144 and DNAJC3-AS1. (b) The targeted relationship between miR-144 and DNAJC3-AS1 was analyzed by Luciferase activity. (c) The DNAJC3-AS1 protein expression was detected. (d) Determination of cell viability. (e) Cell apoptosis was detected. *P < 0.05, **P < 0.01 vs. Control group, ##P < 0.01 vs. NC inhibitor

Figure 3. miR-144 targeted regulation of DNAJC3-AS1 expression to detect the sensitivity of drug-resistant MCF-7 cells. (a) Using TargetScan predict the binding sites of miR-144 and DNAJC3-AS1. (b) The targeted relationship between miR-144 and DNAJC3-AS1 was analyzed by Luciferase activity. (c) The DNAJC3-AS1 protein expression was detected. (d) Determination of cell viability. (e) Cell apoptosis was detected. *P < 0.05, **P < 0.01 vs. Control group, ##P < 0.01 vs. NC inhibitor

Figure 4. miR-144 increases the chemosensitivity of breast cancer cells by inhibiting the expression of autophagy-related proteins and targeting DNAJC3-AS1. (a) Detection of cell activity. (b) Cell apoptosis was detected. (c) Autophagy related protein expression was detected. **P < 0.01 vs. miR-control group, #P < 0.05, ##P < 0.01 vs. miR-144+ pcDNA 3.0 group

Figure 4. miR-144 increases the chemosensitivity of breast cancer cells by inhibiting the expression of autophagy-related proteins and targeting DNAJC3-AS1. (a) Detection of cell activity. (b) Cell apoptosis was detected. (c) Autophagy related protein expression was detected. **P < 0.01 vs. miR-control group, #P < 0.05, ##P < 0.01 vs. miR-144+ pcDNA 3.0 group