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Updated: Jun 26, 2025
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Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
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Cell Cycle Checkpoints p16 and p21-Strong Predictors of Clinicopathologic Outcomes in High-Grade Osteosarcoma
Elham Nasri1, Dianne E Torrence, Terrie Vasilopoulos2
1From the Department of Pathology, Immunology, and Laboratory Medicine, University of Florida College of Medicine, Gainesville, FL.
Cancer Journal (Sudbury, Mass.)
|May 16, 2024
Summary
High p16 expression predicts better outcomes in high-grade osteosarcoma. Moderate p21 expression is linked to improved survival, while extreme levels indicate higher metastasis risk. These markers aid in risk stratification.
Area of Science:
- Oncology
- Molecular Pathology
- Biomarker Research
Background:
- High-grade osteosarcoma is an aggressive bone cancer with variable patient outcomes.
- Accurate prognostic markers are crucial for effective treatment planning and risk stratification.
- Cell cycle regulators like p16 and p21 are potential biomarkers in various cancers.
Purpose of the Study:
- To evaluate the prognostic value of p16 and p21 expression in high-grade osteosarcoma.
- To assess the predictive capability of these markers, individually and in combination, for disease outcomes.
- To determine their utility in predicting response to chemotherapy and patient survival.
Main Methods:
- Immunohistochemistry was used to measure p16 and p21 expression in 101 high-grade osteosarcoma patients.
- Clinicopathologic data were collected and analyzed.
- Statistical methods assessed the correlation between marker expression and disease outcomes.
Main Results:
- High p16 expression (>90%) strongly predicted a good histologic response to chemotherapy, improved 5-year survival, and reduced metastasis risk.
- Moderate p21 expression (1-50%) was associated with better outcomes compared to low (<1%) or high (>50%) expression, which correlated with increased metastasis and decreased survival.
- Combined p16 and p21 expression showed a stronger predictive relationship to 5-year survival than p21 alone or tumor necrosis.
Conclusions:
- p16 and p21 expression levels are valuable prognostic indicators in high-grade osteosarcoma.
- These markers can aid in initial patient assessment and risk stratification for treatment.
- Further validation in larger cohorts is recommended for clinical trial application.
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