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PTEN in Immunity.
Antonella Papa1, Pier Paolo Pandolfi2
1Cancer Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC, 3800, Australia. antonella.papa@monash.edu.
Current Topics in Microbiology and Immunology
|October 15, 2022
Summary
The tumor suppressor PTEN (Phosphatase and Tensin homolog deleted on Chromosome 10) limits cell growth. PTEN loss can promote cancer by affecting immune cells, suggesting combined cell-autonomous and non-autonomous tumor suppression.
Area of Science:
- Oncology
- Immunology
- Molecular Biology
Background:
- PTEN (Phosphatase and Tensin homolog deleted on Chromosome 10) is a critical tumor suppressor, inhibiting the PI3K pathway and restraining cellular growth.
- PTEN inactivation in animal models consistently leads to tumor formation through cell-autonomous mechanisms.
- Emerging evidence highlights the immune system's role in cancer suppression and how mutations can promote oncogenesis by evading immune recognition.
Purpose of the Study:
- To re-evaluate the tumor suppressive mechanisms of PTEN, considering both cell-autonomous and non-autonomous effects.
- To investigate the role of PTEN in immune cell regulation and its impact on cancer progression.
- To explore PTEN's function in immune checkpoint inhibitor resistance and propose new therapeutic strategies.
Main Methods:
- Review of existing literature on PTEN function, tumor suppression, and immune system interactions.
- Analysis of studies detailing PTEN's role in immune cell development and blood malignancies.
- Synthesis of findings to postulate combined cell-autonomous and non-autonomous mechanisms of PTEN tumor suppression.
Main Results:
- PTEN loss not only drives tumor formation autonomously but also influences cancer progression via non-autonomous effects involving immune evasion.
- PTEN plays a crucial role in immune cell development and function, impacting the anti-tumor immune response.
- PTEN loss is associated with resistance to immune checkpoint inhibitors in various cancer types.
Conclusions:
- PTEN functions as a tumor suppressor through a combination of cell-autonomous and non-autonomous mechanisms, including immune regulation.
- Understanding PTEN's dual role is essential for developing effective treatments for PTEN loss-driven cancers.
- Targeting PTEN-related immune evasion pathways may offer new therapeutic avenues for patients with PTEN-deficient tumors.
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