1.中山大学附属第一医院甲状腺外科,广东 广州 510080
2.中山大学附属第一医院超声科,广东 广州 510080
刘增慧,第一作者,研究方向:乳腺肿瘤,E-mail:liuzh373@163.com
卢颖,共同第一作者,研究方向:甲状腺、乳腺疾病,E-mail:luying814228@163.com;徐洪彪,共同通信作者,E-mail:xuhongbiao123456@163.com
收稿:2026-08-03,
修回:2026-08-28,
录用:2026-09-02,
纸质出版:2026-09-20
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刘增慧,卢颖,梁小立等.PAGE5调控PI3K/AKT/MMP1轴促进乳腺癌侵袭和肝转移[J].中山大学学报(医学科学版),2026,47(05):833-842.
LIU Zenghui,LU Ying,LIANG Xiaoli,et al.PAGE5 in Promoting Breast Cancer Invasion and Hepatic Metastasis via Regulation of the PI3K/AKT/MMP1 Axis[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(05):833-842.
刘增慧,卢颖,梁小立等.PAGE5调控PI3K/AKT/MMP1轴促进乳腺癌侵袭和肝转移[J].中山大学学报(医学科学版),2026,47(05):833-842. DOI: 10.11714/jsysu.med.YX20260123.
LIU Zenghui,LU Ying,LIANG Xiaoli,et al.PAGE5 in Promoting Breast Cancer Invasion and Hepatic Metastasis via Regulation of the PI3K/AKT/MMP1 Axis[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(05):833-842. DOI: 10.11714/jsysu.med.YX20260123.
目的
2
本研究旨在揭示
PAGE5
通过调控PI3K/AKT信号通路及其下游效应分子基质金属蛋白酶1(
MMP1
)促进乳腺癌细胞侵袭和肝脏转移的具体分子机制。
方法
2
利用TCGA数据库进行生物信息学分析,评估PAGE5在转移性乳腺癌组织中的表达。采用CCK-8、EdU、Transwell和划痕实验,分析
PAGE5
对乳腺癌细胞的增殖、迁移和侵袭能力的影响。采用NOD-SCID小鼠脾注射建立乳腺癌肝转移动物模型验证
PAGE5
对乳腺癌肝转移的影响。通过转录组测序和KEGG富集分析,鉴定
PAGE5
调控的潜在信号通路。Western blot检测AKT磷酸化水平;采用实时定量聚合酶链反应(qPCR)对
PAGE5
的下游靶分子进行筛选和验证。
结果
2
生物信息学分析显示,
PAGE5
在乳腺癌远处转移组织中的表达明显上调。体外、体内实验证实,PAGE5过表达显著增强了乳腺癌细胞的迁移和侵袭能力,并可促进乳腺癌肝转移病灶的形成,而
PAGE5
敲低可抑制乳腺癌肝转移(
P
<0.000 1)。转录组测序和KEGG富集分析显示,
PAGE5
显著激活了PI3K-AKT信号通路(
P
=0.028 5)。Western blot证实
PAGE5
上调了p-AKT水平,并可被AKT抑制剂MK2206逆转。qPCR证实,
MMP1
是
PAGE5
的关键下游效应因子,并可被MK2206抑制(
P
<0.000 1)。
结论
2
本研究初步证实PAGE5可促进PI3K/AKT信号通路活化,并通过
MMP1
介导乳腺癌侵袭和肝转移。
Objective
2
This study aimed to elucidate the specific molecular mechanism by which
PAGE5
promotes breast cancer cell invasion and hepatic metastasis through regulating the PI3K/AKT signaling pathway and its downstream effector, matrix metalloproteinase 1 (
MMP1
).
Methods
2
Bioinformatics analysis using the TCGA database was performed to evaluate
PAGE5
expression in metastatic breast cancer tissues. The effects of
PAGE5
on the proliferation, migration, and invasion capabilities of breast cancer cells were analyzed using CCK-8, EdU, Transwell, and wound healing assays. A splenic injection hepatic metastasis model in NOD-SCID mice was employed to validate the impact of
PAGE5
on breast cancer liver metastasis. Transcriptome sequencing and KEGG enrichment analysis were conducted to identify potential signaling pathways regulated by
PAGE5
. Western blot was used to detect AKT phosphorylation levels. Quantitative real-time polymerase chain reaction (qPCR) was applied to screen and validate downstream target molecules of
PAGE5
.
Results
2
Bioinformatic analysis revealed that
PAGE5
expression was significantly upregulated in distant metastasis of breast cancer. Both in vitro and in vivo experiments confirmed that
PAGE5
overexpression markedly enhanced the migration and invasion abilities of breast cancer cells and promoted the formation of liver metastatic lesions, whereas
PAGE5
knockdown suppressed breast cancer liver metastasis (
P
<0.000 1). Transcriptome sequencing and KEGG enrichment analysis indicated that
PAGE5
significantly activated the PI3K-AKT signaling pathway (
P
=0.028 5). Western blot confirmed that
PAGE5
upregulated p-AKT levels, which could be reversed by MK2206. The qPCR results confirmed that
MMP1
is a key downstream effector of
PAGE5
, and its expression can be inhibited by MK2206 (
P
<0.000 1).
Conclusions
2
This study preliminarily demonstrates that
PAGE5
can activate the PI3K/AKT signaling pathway and mediate the invasion and liver metastasis of breast cancer through
MMP1
.
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