htert expression correlates with MYC over-expression in human prostate cancer

Area of Science:

• Oncology
• Molecular Biology
• Cancer Research

Background:

• Telomerase catalytic subunit (hTERT) expression is crucial for human cancer development.
• The regulation of hTERT is not fully understood, but c-myc may activate its expression.
• Prostate cancer, a common malignancy, involves deregulated myc expression and telomerase activation.

Purpose of the Study:

• To investigate the relationship between myc and hTERT expression in prostate tumorigenesis.
• To determine if the myc-hTERT pathway plays a role in the development of prostate cancer.

Main Methods:

• Quantification of myc and hTERT mRNA expression in 33 sporadic prostate tumors.
• Utilized a real-time quantitative PCR assay based on TaqMan methodology.

Main Results:

• Myc overexpression was observed in 58% of tumors.
• Elevated hTERT expression, indicating telomerase activity, was found in 67% of tumors.
• A significant association (p = 0.0024) was found between myc overexpression and elevated hTERT expression.
• No correlation was observed between myc or hTERT expression and tumor stage or Gleason grade.

Conclusions:

• The study indicates that myc overexpression is significantly associated with elevated hTERT expression in prostate tumors.
• This suggests that the upregulation of telomerase activity in prostate cancer may be mediated by myc transactivation of hTERT.
• The c-myc protein's ability to enhance telomerase activity via hTERT stimulation is likely an important factor in prostate tumorigenesis.