OPCML as a Tumor Suppressor in Carcinomas and Lymphomas
Author Information
Author(s): Cui Yan, Ying Ying, van Hasselt Andrew, Ng Ka Man, Yu Jun, Zhang Qian, Jin Jie, Liu Dingxie, Rhim Johng S., Rha Sun Young, Loyo Myriam, Chan Anthony T. C., Srivastava Gopesh, Tsao George S. W., Sellar Grant C., Sung Joseph J. Y., Sidransky David, Tao Qian
Primary Institution: Chinese University of Hong Kong
Hypothesis
Is OPCML a broad tumor suppressor that is frequently inactivated by methylation in multiple malignancies?
Conclusion
OPCML is frequently inactivated by methylation in various tumors, indicating its role as a broad tumor suppressor.
Supporting Evidence
- OPCML is frequently silenced in nasopharyngeal carcinoma and other common tumors.
- Pharmacological and genetic demethylation restored OPCML expression.
- OPCML acts as a broad tumor suppressor, inhibiting tumor cell growth.
- OPCML promoter methylation was detected in 98% of nasopharyngeal carcinoma samples.
- OPCML is a stress-responsive gene, but its response is impaired by methylation.
Takeaway
The study found that a gene called OPCML, which helps prevent tumors, is often turned off in many types of cancer because of a chemical change in its DNA.
Methodology
The study used semi-quantitative RT-PCR and methylation-specific PCR to analyze OPCML expression and methylation status in various tumor cell lines and primary tumors.
Limitations
The study did not explore the mechanisms of silencing for OPCML variant 2 and focused primarily on variant 1.
Participant Demographics
The study included various carcinoma and lymphoma cell lines, as well as primary tumor samples from patients.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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