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山西省心血管病医院/山西省心血管病研究所公共卫生科,太原 030027
孟素艳,Email:kingm321321@163.com,研究方向:心脑血管疾病相关因素的流行病学与卫生统计研究等。
收稿:2025-12-09,
修回:2026-03-10,
录用:2026-03-26,
网络首发:2026-06-10,
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孟素艳, 张琳, 马亮. miR-101-3p通过抑制DUSP1诱发心力衰竭小鼠心肌细胞铁死亡[J/OL]. 重庆医科大学学报, 2026,1-7.
MENG Suyan,ZHANG Lin,MA Liang.Micro-ribonucleic acid 101-3p induces ferroptosis in cardiomyocytes of mice with heart failure by inhibiting dual specificity phosphatase 1[J].Journal of Chongqing Medical University,
孟素艳, 张琳, 马亮. miR-101-3p通过抑制DUSP1诱发心力衰竭小鼠心肌细胞铁死亡[J/OL]. 重庆医科大学学报, 2026,1-7. DOI:
MENG Suyan,ZHANG Lin,MA Liang.Micro-ribonucleic acid 101-3p induces ferroptosis in cardiomyocytes of mice with heart failure by inhibiting dual specificity phosphatase 1[J].Journal of Chongqing Medical University, DOI:10.13406/j.cnki.cyxb..
目的
2
探讨微小核糖核酸-101-3p(micro ribonucleic acid-101-3p,miR-101-3p)对心力衰竭(heart failure,HF)小鼠心肌细胞铁死亡的影响及机制。
方法
2
采用横向主动脉缩窄(transverse aortic constriction,TAC)术构建HF小鼠模型。将小鼠随机分为6组:假手术组、TAC组(接受TAC手术)、TAC+antagomir-NC组、TAC+antagomir-101-3p组、antagomir-101-3p+sh-NC组、antagomir-101-3p+sh-双特异性磷酸酶1(dual specificity phosphatase 1,DUSP1)组,每组10只。末次干预后,超声心动图检测小鼠心功能;实时荧光定量聚合酶链式反应(real-time quantitative polymerase chain reaction,qRT-PCR)检测miR-101-3p、DUSP1信使核糖核酸(messenger ribonucleic acid,mRNA)表达;蛋白质印迹检测DUSP1蛋白表达;苏木精-伊红(hematoxylin and eosin,HE)染色观察心肌组织病理损伤;试剂盒检测心肌组织铁死亡标志物Fe
2+
、丙二醛(malondialdehyde,MDA)、谷胱甘肽(glutathione,GSH)和谷胱甘肽过氧化物酶4(glutathione peroxidase 4,GPX4)水平;分离原代心肌细胞进行荧光素酶报告基因实验。
结果
2
与假手术组相比,TAC组小鼠心肌组织miR-101-3p的表达明显升高(
P
<
0.05),左室射血分数(left ventricular ejection fraction,LVEF)、短轴缩短率(fractional shortening,FS)、GSH、GPX4、DUSP1均明显降低(
P
<
0.05),室间隔(interventricular septum,IVS)、左心室后壁厚度(left ventricular posterior wall,LVPW)、左心室心肌质量/体质量(left ventricular myocardial mass/body weight,LV mass/BW)、心肌组织横截面积百分比以及Fe
2+
、MDA水平明显升高(P
<
0.05)。与TAC+antagomir-NC组相比,TAC+antagomir-101-3p组小鼠心肌组织miR-101-3p表达明显降低(
P
<
0.05),LVEF、FS、GSH、GPX4、DUSP1明显升高(
P
<
0.05),IVS、LVPW、LV mass/BW、心肌组织横截面积百分比以及Fe
2+
、MDA水平明显降低(
P
<
0.05)。sh-DUSP1部分逆转了antagomir-101-3p对HF小鼠的改善作用(
P
<
0.05)。荧光素酶报告基因实验显示,miR-101-3p可靶向抑制DUSP1。
结论
2
抑制miR-101-3p通过上调心肌组织中DUSP1的表达抑制心肌细胞铁死亡,从而缓解小鼠HF。
Objective
2
To investigate the effect and mechanism of micro-ribonucleic acid 101-3p(miR-101-3p) on ferroptosis in cardiomyocytes of mice with heart failure(HF).
Methods
2
Transverse aortic constriction(TAC) surgery was performed to establish a mice model of HF. The mice were randomly divided into sham-operation group,TAC group (treated with TAC surgery),TAC+antagomir-NC group,TAC+antagomir-101-3p group,antagomir-101-3p+sh-NC group,and antagomir-101-3p+sh-dual specificity phosphatase 1(DUSP1) group,with 10 mice in each group. After the last intervention,echocardiography was used to assess cardiac function;qRT-PCR was used to measure the mRNA expression levels of miR-101-3p and DUSP1,and Western blot was used to measure the protein expression level of DUSP1;HE staining was used to observe pathological injury in myocardial tissue; kits were used to measure the levels of ferroptosis markers in myocardial tissue,including Fe
2+
,malondialdehyde(MDA),glutathione(GSH),and glutathione peroxidase 4(GPX4);primary cardiomyocytes were isolated for luciferase reporter assay.
Results
2
Compared with the sham-operation group,the TAC group had a significant increase in the expression level of miR-101-3p in myocardial tissue and significant reductions in left ventricular ejection fraction(LVEF),fractional shortening(FS),GSH,GPX4,and DUSP1(
P
<
0.05),as well as significant increases in interventricular septum(IVS),left ventricular posterior wall(LVPW) thickness,left ventricular mass/body weight(LV mass/BW),the percentage of myocardial cross-sectional area,and the levels of Fe
2+
and MDA(
P
<
0.05). Compared with the TAC+antagomir-NC group,the TAC+antagomir-101-3p group had a significant reduction in the expression level of miR-101-3p in myocardial tissue (
P
<
0.05) and significant increases in LVEF,FS,GSH,GPX4,and DUSP1(
P
<
0.05),as well as significant reductions in IVS,LVPW,LV mass/BW,the perce
ntage of myocardial cross-sectional area,and the levels of Fe
2+
and MDA(
P
<
0.05). The results showed that sh-DUSP1 partially reversed the improvement effect of antagomir-101-3p on HF mice(
P
<
0.05). Luciferase reporter assay showed that miR-101-3p could target and inhibit DUSP1.
Conclusion
2
Inhibiting miR-101-3p can alleviate HF in mice by upregulating the expression of DUSP1 in myocardial tissue and inhibiting cardiomyocyte ferroptosis.
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