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The role of the PPM1D gene in tumor pathogenesis
A S Kucheryavenko1, E A Muzyko1, V N Perfilova2
1Volgograd State Medical University, Volgograd, Russia.
Abstract:
The PPM1D gene and its protein product (serine-threonine protein phosphatase, PPM1D or Wip1) are involved in regulation of cell's DNA damage response, cell cycle control, and repair. Amplification, overexpression, or mutations of the PPM1D gene have a significant impact on cell responses to stress factors and genetic instability as well as impairments of processes of double-strand break repair, nucleotide excision repair, base excision repair, cell cycle, and apoptosis. PPM1D dephosphorylates and thus inactivates p53, proteins that respond to DNA strand integrity damage, cell cycle checkpoint proteins, and apoptotic proteins. This contributes to tumor development, growth, and maintenance of the tumor phenotype. In this review we consider data on the role of the PPM1D gene in the formation and maintenance of various oncological processes, including tumors of the mammary glands, ovaries, prostate gland, esophagus, stomach, intestines, liver and pancreas, hemoblastoses, and others.
Insights
The PPM1D gene, encoding Wip1 phosphatase, is crucial for DNA damage response and cell cycle control. Its alterations promote genetic instability and tumor development by inactivating key tumor suppressors like p53.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- The PPM1D gene encodes the Wip1 phosphatase, a key regulator of cellular stress responses.
- Alterations in PPM1D, including amplification and overexpression, are linked to impaired DNA repair and cell cycle control.
- Wip1's role in dephosphorylating and inactivating tumor suppressors like p53 is critical for understanding its oncogenic potential.
Purpose of the Study:
- To review the multifaceted role of the PPM1D gene and Wip1 phosphatase in oncogenesis.
- To elucidate how PPM1D alterations contribute to genetic instability and tumor progression.
- To summarize the involvement of PPM1D in various cancer types.
Main Methods:
- Literature review of studies investigating the PPM1D gene and Wip1 phosphatase.
- Analysis of data linking PPM1D alterations to DNA damage response pathways.
- Compilation of evidence on PPM1D's role in different human malignancies.
Main Results:
- PPM1D/Wip1 plays a significant role in DNA damage response, cell cycle regulation, and apoptosis.
- Gene amplification, overexpression, or mutations in PPM1D lead to genetic instability and compromised DNA repair.
- PPM1D/Wip1 inactivates p53 and other crucial proteins, promoting tumor development and maintenance.
Conclusions:
- The PPM1D gene is a critical player in the development and progression of numerous cancers.
- Targeting PPM1D/Wip1 may offer therapeutic strategies for various oncological conditions.
- Understanding PPM1D's function is essential for advancing cancer research and treatment.
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