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遵义医科大学第二附属医院甲乳外科,贵州遵义
曾 峰,E-mail: tong13639146162@163.com
收稿日期:2025-04-10,
修回日期:2025-06-21,
纸质出版日期:2025-07-30
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邓小玲,张能英,龙开国,等.缺氧微环境下HIF-1α与circ-UBE2G1相互调控促进甲状腺癌转移[J].陆军军医大学学报,2025,47(14):1612-1622.DOI:10.16016/j.2097-0927.202504040.
DENG X L,ZHANG N Y,LONG K G,et al.Mutual regulation of HIF-1α and circ-UBE2G1 under hypoxic microenvironment promotes thyroid cancer metastasis[J].J Army Med Univ,2025,47(14):1612-1622.DOI:10.16016/j.2097-0927.202504040.
邓小玲,张能英,龙开国,等.缺氧微环境下HIF-1α与circ-UBE2G1相互调控促进甲状腺癌转移[J].陆军军医大学学报,2025,47(14):1612-1622.DOI:10.16016/j.2097-0927.202504040. DOI:
DENG X L,ZHANG N Y,LONG K G,et al.Mutual regulation of HIF-1α and circ-UBE2G1 under hypoxic microenvironment promotes thyroid cancer metastasis[J].J Army Med Univ,2025,47(14):1612-1622.DOI:10.16016/j.2097-0927.202504040. DOI:
目的
2
探究缺氧微环境下缺氧诱导因子(hypoxia-inducible factor,HIF)-1α与circ-UBE2G1相互调控促进甲状腺癌(thyroid cancer,THCA)转移的机制。
方法
2
利用GEPIA数据库分析circ-UBE2G1与HIF-1α在THCA中的表达特点及相关性,通过Kaplan-Meier生存曲线分析circ-UBE2G1和miR-330-3p与生存率的关系。THCA细胞暴露于缺氧环境,通过转染沉默HIF-1α分析HIF-1α对circ-UBE2G1转录的调控,并通过转染来沉默circ-UBE2G1。通过靶序列预测和双荧光素酶报告基因验证miR-330-3p与circ-UBE2G1或HIF-1α的靶向关系。利用转染分析HIF-1α过表达以及circ-UBE2G1沉默对THCA细胞迁移和侵袭的影响。通过皮下注射HIF-1α过表达以及circ-UBE2G1沉默的THCA细胞构建荷瘤裸鼠模型。临床收集THCA组织和癌旁正常样本分析circ-UBE2G1、miR-330-3p与HIF-1α的表达及相关性。
结果
2
生信分析结果表明circ-UBE2G1与HIF-1α呈正相关(
P<
0.01),circ-UBE2G1的高表达与THCA患者低生存率相关(
P
=0.024)。抑制HIF-1α阻断缺氧对circ-UBE2G1的促进作用(
P<
0.05)。沉默circ-UBE2G1抑制THCA细胞迁移和侵袭,逆转HIF-1α对其的促进作用(
P<
0.05)。双荧光素酶报告基因显示,miR-330-3p分别与circ-UBE2G1和HIF-1α靶向结合(
P<
0.05)。沉默circ-UBE2G1导致miR-330-3p水平升高(
P<
0.05),而增加miR-330-3p则抑制HIF-1α的表达(
P<
0.05)。临床THCA样本中circ-UBE2G1与HIF-1α均升高且呈正相关(
P<
0.05),并且THCA样本中miR-330-3p低表达且分别与circ-UBE2G1和HIF-1α呈负相关(
P<
0.05)。
结论
2
缺氧通过诱导HIF-1α表达促进circ-UBE2G1的转录,circ-UBE2G1通过靶向miR-330-3p促进HIF-1α的表达,从而促进THCA转移。
Objective To investigate the mechanism by which hypoxia-inducible factor (HIF)-1α and circ-UBE2G1 mutually regulate and promote thyroid cancer (THCA) metastasis under hypoxic microenvironment. Methods The GEPIA database was used to analyze the expression characteristics and correlation between ci
rc-UBE2G1 and HIF-1α in THCA. The relationship of circ-UBE2G1 and miR-330-3p with survival rate was analyzed using Kaplan-Meier survival curve. After THCA cells were exposed to hypoxia
HIF-1α was silenced by transfection to analyze its regulation for circ-UBE2G1 transcription. The targeting relationship between miR-330-3p and either circ-UBE2G1 or HIF-1α was verified by sequence prediction and dual luciferase reporter assay. The effects of HIF-1α overexpression and circ-UBE2G1 silencing on THCA cell migration and invasion were analyzed after corresponding transfections. A tumor-bearing nude mouse model was established by subcutaneous injection of THCA cells with HIF-1α overexpression and circ-UBE2G1 silencing
respectively. THCA tissues and adjacent normal samples were clinically collected to analyze the expression levels and correlations of circ-UBE2G1
miR-330-3p
and HIF-1α. Results Bioinformatics analysis showed that circ-UBE2G1 was positively correlated with HIF-1α (
P<
0.01)
and its high expression was associated with a low survival rate in THCA patients (
P
=0.024). Inhibition of HIF-1α blocked the promotive effect of hypoxia on circ-UBE2G1 (
P<
0.05). Silencing circ-UBE2G1 inhibited the migration and invasion of THCA cells (
P<
0.05)
and reversed the promotive effect of HIF-1α on these processes (
P<
0.05). Dual luciferase reporter gene assay revealed that miR-330-3p targeted both circ-UBE2G1 and HIF-1α (
P<
0.05). Silencing circ-UBE2G1 led to increased levels of miR-330-3p (
P<
0.05)
whereas increasing miR-330-3p inhibited the expression of HIF-1α (
P<
0.05). In clinical THCA samples
both circ-UBE2G1 and HIF-1α were increased and positively correlated (
P<
0.05)
while miR-330-3p was lowly expressed and negatively correlated with both circ-UBE2G1 and HIF-1α (
P<
0.05). Conclusion Hypoxia promotes the transcription of circ
-UBE2G1 by inducing HIF-1α expression
and circ-UBE2G1 promotes HIF-1α expression by targeting miR-330-3p
thereby promoting THCA metastasis.
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