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Genetic Analysis of Osteosarcoma Cells in a 9-year-old Boy: Genes Involved in Cell Cycle Control
Dragan Jovanovic1, Alwajih Tariq2, Sara Dlugos2
1Department of Pathology, Trinity Medical Sciences University, Georgia 30004 USA, Saint Vincent and The Grenadine's Campus. djovanovic@tmsu.edu.vc.
Acta Medica Academica
|July 22, 2025
Summary
Genetic mutations in osteosarcoma were analyzed in a young boy, revealing complex chromosomal instability. Key gene alterations like ATRX, p53, and CDKN2A deletions were identified, contributing to this aggressive bone cancer.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- Osteosarcoma is an aggressive bone cancer with complex genetic underpinnings.
- Understanding the specific genetic mutations is crucial for deciphering its etiopathogenesis.
Purpose of the Study:
- To describe gene mutations regulating cell growth, death, and DNA repair in a pediatric osteosarcoma case.
- To investigate genetic alterations including protein expression and chromosomal abnormalities.
Main Methods:
- Case report of a 9-year-old boy with osteosarcoma.
- Analysis of ATRX protein expression, p53 function, and Retinoblastoma positivity.
- Detection of chromosomal deletions (9p21.3, 8p, 19q11-q13.43) and SATB2 protein staining.
Main Results:
- Subset tumor cells expressed ATRX; p53 function was lost in 40-50% of malignant cells.
- Retinoblastoma positivity and SATB2 positivity were observed in substantial tumor cell subsets.
- Deletions on chromosomes 9, 8p, and 19q11-q13.43 were identified, including tumor suppressor genes like CDKN2A/B and NKX3.1.
Conclusions:
- Osteosarcoma exhibits significant chromosomal instability and genetic complexity.
- Heterogeneous genomic rearrangements are common, but consistent genetic markers for etiopathogenesis remain elusive.
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