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Updated: Jan 27, 2026
Heterotypic Three-dimensional In Vitro Modeling of Stromal-Epithelial Interactions During Ovarian Cancer Initiation and Progression
Published on: August 28, 2012
Dual-specificity phosphatase 5 suppresses ovarian cancer progression by inhibiting IL-33 signaling
Li Wang1,2, Jinghui Hu3, Dongmei Qiu4
1Department of Obstetrics and Gynecology, The First Affiliated Hospital of Soochow University Suzhou, China.
Abstract:
Ovarian cancer (OC) is the leading cause of death from gynecological malignancy. Dual-specificity phosphatases (DUSPs) are proteins that are reported involved in carcinogenesis, but their roles in OC have not be extensively studied. Here, we found that DUSP5 is markedly down-regulated in OC tissues. We reanalyzed DUSP5 expression in OC using published microarray data from the Gene Expression Omnibus (GEO) database and found that patients with low DUSP5 expression have significantly shorter overall survival than those with high expression (P < 0.001). Down-regulation of DUSP5 in OC tissues was immunohistochemically confirmed in tissue microarrays containing 15 normal ovary tissue samples and 60 OC specimens. Functional studies suggest that DUSP5 silence facilitates cell proliferation, migration, and invasion of OC cells in vitro. DUSP5 over-expression inhibits cell proliferation but has no effect on OC cell migration or invasion. Mechanistically, silencing DUSP5 transcriptionally activates interleukin 33 (IL-33) expression and secretion. Blockage of IL-33 with a neutralizing anti-IL33 antibody attenuates the effect of DUSP5 silencing to promote cell proliferation, migration, and invasion. Moreover, recombinant IL-33 protein treatment dramatically promotes OC cell proliferation, migration, and invasion with DUSP5 over-expression. Our study provides proof of principle that DUSP5 down-regulation promotes proliferation, migration, and invasion of OC cells via activation of IL-33 signaling.
Insights
Dual-specificity phosphatase 5 (DUSP5) is down-regulated in ovarian cancer (OC), promoting tumor cell proliferation and spread. Restoring DUSP5 may offer a therapeutic strategy for OC by inhibiting interleukin-33 (IL-33) signaling.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Ovarian cancer (OC) is a leading cause of gynecological cancer mortality.
- Dual-specificity phosphatases (DUSPs) are implicated in carcinogenesis, but their specific roles in OC remain understudied.
- DUSP5, a member of the DUSP family, has not been extensively investigated in the context of OC pathogenesis.
Purpose of the Study:
- To investigate the expression and functional role of DUSP5 in ovarian cancer (OC).
- To elucidate the underlying molecular mechanisms by which DUSP5 influences OC progression.
- To explore the potential of DUSP5 as a prognostic biomarker and therapeutic target in OC.
Main Methods:
- Analysis of DUSP5 expression in OC tissues and correlation with patient survival using Gene Expression Omnibus (GEO) microarray data.
- Immunohistochemical validation of DUSP5 down-regulation in OC tissues.
- In vitro functional studies involving DUSP5 silencing and over-expression in OC cells.
- Investigation of the role of interleukin-33 (IL-33) signaling pathway using neutralizing antibodies and recombinant IL-33 protein.
Main Results:
- DUSP5 was significantly down-regulated in OC tissues compared to normal ovarian samples.
- Low DUSP5 expression correlated with shorter overall survival in OC patients (P < 0.001).
- DUSP5 silencing promoted OC cell proliferation, migration, and invasion in vitro.
- DUSP5 over-expression inhibited OC cell proliferation but did not affect migration or invasion.
- DUSP5 silencing transcriptionally activated IL-33 expression and secretion.
- IL-33 blockage attenuated the pro-proliferative and pro-migratory effects of DUSP5 silencing.
- Recombinant IL-33 protein promoted OC cell proliferation, migration, and invasion, even with DUSP5 over-expression.
Conclusions:
- DUSP5 down-regulation is a significant event in ovarian cancer progression.
- DUSP5 suppresses OC cell proliferation, migration, and invasion, potentially through the inhibition of IL-33 signaling.
- DUSP5 acts as a tumor suppressor in OC, and its modulation represents a potential therapeutic avenue.
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