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甘肃省肿瘤医院骨软一科,兰州 730050
Received:27 September 2024,
Revised:18 February 2025,
Accepted:2025-02-10,
Published:30 March 2025
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梁福东,狄淑芳,罗伟等.LncRNA MALAT1对骨肉瘤细胞阿霉素耐药性的影响机制研究 Δ[J].中国药房,2025,36(06):698-703.
LIANG Fudong,DI Shufang,LUO Wei,et al.Effect mechanism of LncRNA MALAT1 on doxorubicin resistance in osteosarcoma cells[J].ZHONGGUO YAOFANG,2025,36(06):698-703.
梁福东,狄淑芳,罗伟等.LncRNA MALAT1对骨肉瘤细胞阿霉素耐药性的影响机制研究 Δ[J].中国药房,2025,36(06):698-703. DOI: 10.6039/j.issn.1001-0408.2025.06.10.
LIANG Fudong,DI Shufang,LUO Wei,et al.Effect mechanism of LncRNA MALAT1 on doxorubicin resistance in osteosarcoma cells[J].ZHONGGUO YAOFANG,2025,36(06):698-703. DOI: 10.6039/j.issn.1001-0408.2025.06.10.
目的
2
探讨长链非编码RNA(LncRNA)肺腺癌转移相关转录本1(MALAT1)与骨肉瘤(OS)细胞阿霉素(DOX)耐药性的关系及作用机制。
方法
2
将MG-63和MG-63/DOX细胞用不同浓度DOX(0、0.01、0.05、0.1、1 μmol/L)处理后,以CCK-8法检测其存活率和半数抑制浓度(IC
50
);采用实时荧光定量聚合酶链反应法检测MG-63和MG-63/DOX细胞中LncRNA MALAT1表达。将MG-63/DOX细胞分为Control(对照)组、敲低LncRNA MALAT1的阴性对照(sh-NC)组、sh-MALAT1组、sh-MALAT1+抑制(anti)-NC组、sh-MALAT1+anti-miR-154-5p组。检测各组MG-63/DOX细胞中LncRNA MALAT1、miR-154-5p、细胞周期素D1(CCND1)mRNA相对表达量,采用CCK-8法、划痕实验、Transwell实验、流式细胞仪分别检测敲低LncRNA MALAT1对MG-63/DOX细胞增殖、迁移、侵袭、凋亡的影响;采用Western blot法检测MG-63/DOX细胞中增殖细胞核抗原(PCNA)、CCND1蛋白的表达;采用双荧光素酶报告基因实验检测LncRNA MALAT1与miR-154-5p、miR-154-5p与CCND1之间的相互作用。
结果
2
与0 μmol/L DOX比较,0.01、0.05、0.1、1 μmol/L DOX均能降低MG-63和MG-63/DOX细胞(0.01 μmol/L DOX除外)的存活率(
P
<0.05),IC
50
分别为0.07、0.13 μmol/L。sh-MALAT1组MG-63/DOX细胞存活率、迁移数、侵袭数、划痕愈合率、LncRNA MALAT1 mRNA表达、CCND 1 mRNA和蛋白表达、PCNA蛋白表达均显著低于sh-NC组、Control组,细胞凋亡率和miR-154-5p表达显著高于sh-NC组、Control组(
P
<0.05);相较于sh-MALAT1组,sh-MALAT1+anti-miR-154-5p组的上述生物学作用均被逆转(
P
<0.05)。在转染MALAT1-野生型(WT)和CCND1-WT的MG-63/DOX细胞中,miR-154-5p模拟物(mimic)组的荧光素酶活性均显著低于其阴性
对照组(
P
<0.05)。
结论
2
敲低LncRNA MALAT1可以抑制OS细胞的DOX耐药性,其机制可能是通过靶向miR-154-5p/CCND1轴实现的。
OBJECTIVE
2
To investigate the relationship of long non-coding RNA (LncRNA) metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) and doxorubicin (DOX) resistance in osteosarcoma (OS) cells.
METHODS
2
MG-63 and MG-63/DOX cells were treated with different concentrations of DOX (0, 0.01, 0.05, 0.1, 1 μmol/L), and survival rates and half maximal inhibitory concentration were determined using CCK-8 assay. The expressions of LncRNA MALAT1 in MG-63 and MG-63/DOX cells were detected by real-time quantitative fluorescence PCR. MG-63/DOX cells were divided into Control group, knocking down LncRNA MALAT1 negative control (sh-NC) group, sh-MALAT1 group, sh-MALAT1+anti-NC group, and sh-MALAT1+anti-miR-154-5p group. The expressions of LncRNA MALAT1, miR-154-5p and cyclin D1 (CCND1) mRNA in MG-63/DOX cells of each group were detected. The effects of knocking down LncRNA MALAT1 on the proliferation, migration, invasion, and apoptosis of MG-63/DOX cells were detected by CCK-8 assay, scratch test, Transwell experiment and flow cytometry, respectively. The expression of proliferating cell nuclear protein (PCNA) and CCND1 protein in MG-63/DOX cells was detected by Western blot assay. Interactions between LncRNA MALAT1 and miR-154-5p, miR-154-5p and CCND1 were detected by dual luciferase reporter gene experiment.
RESULTS
2
Compared with 0 μmol/L DOX, 0.01, 0.05, 0.1 and 1 μmol/L DOX could reduce the survival rates of MG-63 and MG-63/DOX cells (except for 0.01 μmol/L DOX) (
P
<0.05), IC
50
were 0.07 and 0.13 μmol/L, respectively. The survival rate, cell migration number and invasion number of MG-63/DOX cells, scratch closure rate, mRNA expressions of LncRNA MALAT1, mRNA and protein expressions of CCND1, and PCNA protein ex
pression in sh-MALAT1 group were significantly lower than sh-NC group and Control group; the apoptosis rate and miR-154-5p expression were significantly higher than sh-NC group and Control group (
P
<0.05). sh-MALAT1+anti-miR-154-5p group was able to reverse the aforementioned biological effects in sh-MALAT1 group (
P
<0.05). In MG-63/DOX cells transfected with both MALAT1-wild type (WT) and CCND1-WT, the luciferase activity in the miR-154-5p mimic group was significantly lower than mimic negative control group (
P
<0.05).
CONCLUSIONS
2
Knocking down LncRNA MALAT1 can inhibit the DOX resistance of OS cells, and its mechanism may be targeting the miR-154-5p/CCND1 axis.
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