1.解放军总医院:,第一医学中心肝胆胰外科医学部,北京
2.解放军总医院:,第八医学中心肝胆外科,北京
3.空军特色医学中心放射治疗科,北京
SUN Zhijia, E-mail: sunzhijia301@163.com
Received:26 May 2025,
Revised:2025-07-17,
Accepted:21 July 2025,
Published:15 September 2025
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王瑞官,王静,闫茂慧,等.谷胱甘肽过氧化物酶7通过PI3K-AKT通路调控肝癌细胞增殖和衰老[J].陆军军医大学学报,2025,47(17):2028-2038.DOI:10.16016/j.2097-0927.202505063.
WANG R G,WANG J,YAN M H,et al.GPX7 regulates proliferation and senescence of hepatocellular carcinoma cells through the PI3K-AKT pathway[J].J Army Med Univ,2025,47(17):2028-2038.DOI:10.16016/j.2097-0927.202505063.
王瑞官,王静,闫茂慧,等.谷胱甘肽过氧化物酶7通过PI3K-AKT通路调控肝癌细胞增殖和衰老[J].陆军军医大学学报,2025,47(17):2028-2038.DOI:10.16016/j.2097-0927.202505063. DOI:
WANG R G,WANG J,YAN M H,et al.GPX7 regulates proliferation and senescence of hepatocellular carcinoma cells through the PI3K-AKT pathway[J].J Army Med Univ,2025,47(17):2028-2038.DOI:10.16016/j.2097-0927.202505063. DOI:
目的
2
探究谷胱甘肽过氧化物酶7(glutathione peroxidase 7,GPX7)对肝细胞癌(hepatocellular carcinoma,HCC)细胞增殖和衰老的影响,及其作为潜在治疗靶点的价值。
方法
2
分析癌症基因组图谱计划数据库(The Cancer Genome Atlas,TCGA)中HCC患者的临床和转录组数据,评估GPX7表达与预后的关系;采用Western blot、qRT-PCR、CCK-8实验和EdU染色、SA-β-Gal染色等方法,比较GPX7在HCC细胞系和正常肝细胞中的表达及功能;构建稳定敲低GPX7的Hep3B细胞系,通过RNA-seq分析转录组变化,并利用PI3K抑制剂LY294002和激活剂740 Y-P验证GPX7通过PI3K-AKT通路调控细胞衰老;体内实验采用18只6周龄雄性裸鼠(体质量18~22 g)构建移植瘤模型,观察肿瘤生长情况;分析2012年1月至2022年12月解放军总医院第八医学中心肝胆外科56例HCC患者的肿瘤和癌旁组织样本,评估GPX7的表达与临床病理特征的关系。
结果
2
TCGA数据分析显示,GPX7在HCC肿瘤组织中显著高表达(
P
<
0.01),且高表达GPX7患者的总生存期(overall survival,OS)显著缩短(
P
=0.018)。Western blot和qRT-PCR结果显示,GPX7在HCC细胞系中的表达水平显著高于正常肝细胞(
P
均
<
0.01)。敲低GPX7后,HCC细胞的CCK-8吸光度值显著降低(
P
<
0.01),EdU阳性细胞比例显著减少(
P
<
0.01),SA-β-Gal阳性细胞比例显著增加(
P
均
<
0.01)。RNA-seq分析显示,差异基因在PI3K-AKT信号通路显著富集(
P
<
0.05)。PI3K抑制剂LY294002处理显著增强敲低GPX7对细胞衰老的诱导作用(
P
<
0.01),而PI3K激活剂740 Y-P则部分逆转此效应(
P
<
0.05)。裸鼠移植瘤模型中,敲低GPX7显著抑制裸鼠肿瘤生长(
P
<
0.01),PI3K激活剂740 Y-P能部分逆转这一效应(
P
<
0.01)。临床样本分析显示,GPX7高表达与肿瘤分化程度负相关(
P
<
0.05),且高表达患者总体生存期缩短(
HR
=2.61, 95%
CI
: 1.26~5.39,
P
=0.005)。
结论
2
GPX7通过PI3K-AKT通路调控细胞增殖和衰老,可能是HCC治疗的潜在靶点。
Objective To investigate the effects of glutathione peroxidase 7 (GPX7) on the proliferation and senescence of hepatocellular carcinoma (HCC) cells and its potential value as a therapeutic target. Methods Clinical and transcriptomic data from HCC patients in The Cancer Genome Atlas (TCGA) database were analyzed to evaluate the relationship between GPX7 expression and prognosis. Western blotting
qRT-PCR
CCK-8 assay
EdU staining
and SA-β-Gal staining were employed to compare the expression and function of GPX7 in HCC cell lines and normal liver cells. A stable GPX7-knockdown Hep3B cell line was established
and transcriptomic changes were analyzed using RNA-seq. The PI3K inhibitor LY294002 and its activator 740 Y-P were utilized to determine the role of GPX7 in regulating cell senescence
via
the PI3K-AKT pathway. An orthotopic xenograft model was constructed using 18 male nude mice (6 weeks old
18~22 g) to observe tumor growth. Tumor and adjacent tissue samples from 56 HCC patients (obtained from the Eighth Medical Center of Chinese PLA General Hos
pital between January 2012 and December 2022) were analyzed to assess the relationship between GPX7 expression and clinicopathological features. Results TCGA data analysis revealed that GPX7 was significantly highly expressed in HCC tumor tissues (
P
<
0.01)
and the patients with high GPX7 expression had obviously shorter overall survival (OS) (
P
=0.018). Western blotting and qRT-PCR showed that the expression level of GPX7 was notably higher in the HCC cell lines than the normal liver cells (
P
<
0.01). After GPX7 knockdown
the CCK-8 absorbance values of HCC cells were significantly reduced (
P
<
0.01)
the proportion of EdU-positive cells was obviously decreased (
P
<
0.01)
and the proportion of SA-β-Gal positive cells was notably increased (
P
<
0.01). RNA-seq analysis revealed that differentially expressed genes were significantly enriched in the PI3K-AKT signaling pathway (
P
<
0.05). The PI3K inhibitor LY294002 significantly enhanced the GPX7 knockdown-induced cell senescence (
P
<
0.01)
while the activator 740 Y-P partially reversed this effect (
P
<
0.05). In the xenograft model
GPX7 knockdown significantly inhibited tumor growth in nude mice (
P
<
0.01)
and the PI3K activator 740 Y-P partially reversed this effect (
P
<
0.01). Clinical sample analysis displayed that high GPX7 expression was negatively correlated with tumor differentiation (
P
<
0.05)
and its high expression was associated with shortened OS (
HR
=2.61
95%
CI
: 1.26~5.39
P
=0.005). Conclusion GPX7 regulates cell proliferation and senescence through the PI3K-AKT pathway
and may serve as a potential therapeutic target for HCC treatment.
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