Related Experiment Videos
DownRegulated SOX4 Expression Suppresses Cell Proliferation, Migration, and Induces Apoptosis in Osteosarcoma In
Dong Chen1,2, Chuanzhen Hu3,4, Gen Wen1,2
1Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, 215003, China.
Abstract:
The SOX4 transcription factor is involved in various cellular processes, such as embryonic development and differentiation. Deregulated expression of Sox4 in several human cancers has been reported to date, but its biological functions in the progression of osteosarcoma remain unclear. In this study, we found that the expression levels of SOX4 protein were significantly higher in high-grade osteosarcoma tissues and metastatic osteosarcoma tissues. Its overexpression was associated with poor prognosis in osteosarcoma. Knockdown of the SOX4 gene in the osteosarcoma cell lines resulted in decreased cell proliferation, migration, invasion, and induced apoptosis. After SOX4 gene silencing, the protein expression levels of Bax, Caspase-3, and P53 in osteosarcoma cells were significantly elevated, while the protein expression levels of Bcl-2, MMP2, and MMP9 were obviously decreased. In vivo analysis in nude mice further confirmed that knockdown of SOX4 suppressed tumor growth. In conclusion, SOX4 appears to be an important tumor oncogene in the regulation of osteosarcoma cell proliferation, apoptosis, and invasion, and it may be a potential target for effective osteosarcoma therapy.
Insights
SOX4 protein is overexpressed in osteosarcoma, promoting tumor growth and metastasis. Reducing SOX4 levels inhibits cancer cell proliferation and invasion, suggesting SOX4 as a potential therapeutic target for osteosarcoma.
Area of Science:
- Molecular Biology
- Oncology
- Cancer Research
Background:
- SOX4 (SRY-box transcription factor 4) is crucial for embryonic development and differentiation.
- Aberrant SOX4 expression is implicated in various human cancers.
- The role of SOX4 in osteosarcoma progression is not well understood.
Purpose of the Study:
- To investigate the expression and function of SOX4 in osteosarcoma.
- To determine the potential of SOX4 as a therapeutic target for osteosarcoma.
Main Methods:
- Analysis of SOX4 protein expression in human osteosarcoma tissues.
- In vitro studies involving SOX4 gene knockdown in osteosarcoma cell lines.
- Assessment of cell proliferation, migration, invasion, and apoptosis.
- Western blot analysis of apoptosis-related proteins (Bax, Caspase-3, P53, Bcl-2) and matrix metalloproteinases (MMP2, MMP9).
- In vivo tumor xenograft models in nude mice.
Main Results:
- SOX4 protein levels were significantly elevated in high-grade and metastatic osteosarcoma tissues, correlating with poor prognosis.
- SOX4 knockdown reduced osteosarcoma cell proliferation, migration, and invasion, while inducing apoptosis.
- Silencing SOX4 increased pro-apoptotic proteins (Bax, Caspase-3, P53) and decreased anti-apoptotic (Bcl-2) and invasion-related proteins (MMP2, MMP9).
- In vivo studies confirmed that SOX4 knockdown suppressed tumor growth.
Conclusions:
- SOX4 acts as an oncogene in osteosarcoma, regulating cell proliferation, apoptosis, and invasion.
- SOX4 is a potential therapeutic target for osteosarcoma treatment.
- Targeting SOX4 may offer a novel strategy for effective osteosarcoma therapy.