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Oncogene Expression Analysis with Alterations in pH in a Pancreatic Ductal Cell Line
Published on: April 11, 2025
PPM1D exerts its oncogenic properties in human pancreatic cancer through multiple mechanisms
Bo Wu1, Bo-Min Guo2, Jie Kang2
1Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 YiShan Road, Shanghai, Shanghai, 200233, China. wubo7421@sohu.com.
Abstract:
Protein phosphatase, Mg(2+)/Mn(2+) dependent, 1D (PPM1D) is emerging as an oncogene by virtue of its negative control on several tumor suppressor pathways. However, the clinical significance of PPM1D in pancreatic cancer (PC) has not been defined. In this study, we determined PPM1D expression in human PC tissues and cell lines and their irrespective noncancerous controls. We subsequently investigated the functional role of PPM1D in the migration, invasion, and apoptosis of MIA PaCa-2 and PANC-1 PC cells in vitro and explored the signaling pathways involved. Furthermore, we examined the role of PPM1D in PC tumorigenesis in vivo. Our results showed that PPM1D is overexpressed in human PC tissues and cell lines and significantly correlated with tumor growth and metastasis. PPM1D promotes PC cell migration and invasion via potentiation of the Wnt/β-catenin pathway through downregulation of apoptosis-stimulating of p53 protein 2 (ASPP2). In contrast to PPM1D, our results showed that ASPP2 is downregulated in PC tissues. Additionally, PPM1D suppresses PC cell apoptosis via inhibition of the p38 MAPK/p53 pathway through both dephosphorylation of p38 MAPK and downregulation of ASPP2. Furthermore, PPM1D promotes PC tumor growth in vivo. Our results demonstrated that PPM1D is an oncogene in PC.
Insights
Protein phosphatase, Mg(2+)/Mn(2+) dependent, 1D (PPM1D) acts as an oncogene in pancreatic cancer (PC). Overexpression of PPM1D promotes PC cell migration, invasion, and tumor growth while suppressing apoptosis, highlighting its clinical significance.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Protein phosphatase, Mg(2+)/Mn(2+) dependent, 1D (PPM1D) is recognized for its role in tumor suppression pathways.
- The clinical significance of PPM1D in pancreatic cancer (PC) remains underexplored.
Purpose of the Study:
- To investigate PPM1D expression in PC tissues and cell lines.
- To elucidate the functional role of PPM1D in PC cell migration, invasion, and apoptosis.
- To explore the underlying signaling pathways and in vivo tumorigenesis.
Main Methods:
- Quantitative analysis of PPM1D expression in human PC tissues and cell lines.
- In vitro assays assessing cell migration, invasion, and apoptosis.
- Western blotting and signaling pathway analysis (Wnt/β-catenin, p38 MAPK/p53).
- In vivo tumor growth studies in a mouse model.
Main Results:
- PPM1D is significantly overexpressed in PC tissues and cell lines, correlating with tumor growth and metastasis.
- PPM1D promotes PC cell migration and invasion by activating the Wnt/β-catenin pathway and downregulating apoptosis-stimulating of p53 protein 2 (ASPP2).
- PPM1D suppresses PC cell apoptosis by inhibiting the p38 MAPK/p53 pathway and downregulating ASPP2.
- ASPP2 is downregulated in PC tissues.
- PPM1D enhances PC tumor growth in vivo.
Conclusions:
- PPM1D functions as an oncogene in pancreatic cancer.
- PPM1D overexpression drives PC progression through modulation of key signaling pathways and tumor suppressor proteins.
- Targeting PPM1D may offer a therapeutic strategy for pancreatic cancer.
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