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Telomerase expression predicts unfavorable outcome in osteosarcoma
Robert P Sanders1, Rachid Drissi, Catherine A Billups
1St Jude Children's Research Hospital, Memphis, TN 38105, USA.
Summary
Telomerase expression in osteosarcoma tumors is linked to poorer survival outcomes. This finding suggests telomerase may be a significant molecular marker for predicting patient prognosis.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Osteosarcoma typically lacks telomerase, using the alternative lengthening of telomeres (ALT) pathway.
- Telomerase expression is hypothesized to correlate with increased tumor aggressiveness in cancers.
Purpose of the Study:
- To investigate the clinical significance of telomerase expression in human osteosarcoma.
- To determine if telomerase expression impacts patient survival and disease progression.
Main Methods:
- Evaluated 56 osteosarcomas from 51 patients for telomerase enzyme activity, TERT mRNA expression, and ALT pathway presence.
- Analyzed progression-free survival (PFS) and overall survival (OS) based on TERT mRNA expression in primary tumors.
Main Results:
- Fourteen (32%) of 44 evaluable primary osteosarcoma tumors expressed TERT mRNA.
- TERT mRNA-positive tumors were associated with significantly inferior 3-year PFS (21.4%) and OS (42.9%) compared to TERT-negative tumors (PFS 63.7%, OS 70.0%).
- In patients with nonmetastatic disease, TERT expression also trended towards worse PFS.
Conclusions:
- Telomerase expression in osteosarcoma primary tumors is associated with reduced progression-free and overall survival.
- Telomerase expression may serve as a valuable molecular marker for predicting clinical outcomes in osteosarcoma.
- Further research is needed to fully establish the clinical utility of telomerase as a prognostic marker.