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Pseudogene MSTO2P enhances hypoxia-induced osteosarcoma malignancy by upregulating PD-L1
Ce Shi1, Chao-Ming Huang2, Bing Wang1
1Department of Orthopedics, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, China.
Biochemical and Biophysical Research Communications
|August 10, 2020
Summary
Hypoxia promotes osteosarcoma (bone cancer) growth and spread. The pseudogene MSTO2P drives this progression, potentially through PD-L1, offering new therapeutic targets.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Hypoxia is implicated in osteosarcoma (bone cancer) development and progression.
- The pseudogene MSTO2P is dysregulated in various cancers, but its role in osteosarcoma is unclear.
Purpose of the Study:
- To investigate the mechanism of MSTO2P in osteosarcoma progression under hypoxic conditions.
- To explore the relationship between MSTO2P, PD-L1, and tumor growth in osteosarcoma.
Main Methods:
- Quantitative real-time PCR (RT-qPCR) and Western blot for gene and protein expression.
- Transwell and soft agar assays for cell invasion and anchorage-independent growth.
- Xenograft tumor experiments in immunodeficient mice and analysis of clinical tissues.
Main Results:
- Hypoxia enhanced osteosarcoma cell growth, invasion, and epithelial-mesenchymal transition (EMT).
- MSTO2P knockdown attenuated these effects under hypoxia.
- MSTO2P positively correlated with tumor growth in vivo and in human samples, with PD-L1 acting as a key mediator.
Conclusions:
- MSTO2P plays a crucial role in osteosarcoma progression under hypoxia, partly via PD-L1.
- This study reveals a novel mechanism for osteosarcoma development, suggesting MSTO2P as a potential diagnostic and therapeutic target.
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