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LncRNA MALAT1对骨肉瘤细胞阿霉素耐药性的影响机制研究
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梁福东 ,狄淑芳,罗 伟,齐江华,刘利兵(甘肃省肿瘤医院骨软一科,兰州 730050)
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中图分类号 R979.1+4;R738.1 文献标志码 A 文章编号 1001-0408(2025)06-0698-06
DOI 10.6039/j.issn.1001-0408.2025.06.10
摘 要 目的 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 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(IC50 );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 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),IC50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 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。
关键词 长链非编码RNA;肺腺癌转移相关转录本1;微小RNA-154-5p;细胞周期蛋白D1;骨肉瘤;阿霉素;耐药性
Effect mechanism of LncRNA MALAT1 on doxorubicin resistance in osteosarcoma cells
LIANG Fudong,DI Shufang,LUO Wei,QI Jianghua,LIU Libing(First Department of Orthopaedics, Gansu
Cancer Hospital, Lanzhou 730050, China)
ABSTRACT OBJECTIVE 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 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 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), IC50 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 expression 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 Knocking down LncRNA MALAT1
Δ 基金项目 甘肃省自然科学基金资助项目(No.24JRRA1149) can inhibit the DOX resistance of OS cells, and its mechanism
*第一作者 主治医师,硕士。研究方向:骨与软组织肿瘤的诊治。 may be targeting the miR-154-5p/CCND1 axis.
E-mail:15193122021@163.com。 KEYWORDS long non-coding RNA; metastasis-associated
# 通信作者 主治医师,硕士。研究方向:骨与软组织肿瘤的诊治。 lung adenocarcinoma transcript 1; miR-154-5p; cyclin D1;
E-mail:59472913@qq.com osteosarcoma; doxorubicin; drug resistance
· 698 · China Pharmacy 2025 Vol. 36 No. 6 中国药房 2025年第36卷第6期