- Mdm2 and p53 Expression in Radiation-Induced Sarcomas of the Head and Neck: Comparison with De Novo Sarcomas
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Min Jeong Song, Joon Seon Song, Jong-Lyel Roh, Seung-Ho Choi, Soon Yuhl Nam, Sang Yoon Kim, Sung Bae Kim, Sang-wook Lee, Kyung-Ja Cho
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Korean J Pathol. 2014;48(5):346-350. Published online October 27, 2014
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DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.5.346
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- Background: The pathogenesis of radiation-induced sarcomas (RISs) is not well known. In RIS, TP53 mutations are frequent, but little is known about Mdm2-p53 interaction, which is a recent therapeutic target of sarcomas. Methods: We studied the immunohistochemical expression of Mdm2 and p53 of 8 RISs. The intervals between radiation therapy and diagnosis of secondary sarcomas ranged from 3 to 17 years. Results: Mdm2 expression was more common in de novo sarcomas than RISs (75% vs 37.5%), and p53 expression was more common in RISs than in de novo cases (75% vs 37.5%). While half of the RISs were Mdm2(–)/p53(+), none of de novo cases showed such combination; while half of de novo sarcomas were Mdm2(+)/p53(–), which are a candidate group of Mdm2 inhibitors, only 1 RIS showed such a combination. Variable immunoprofiles observed in both groups did not correlate with tumor types, except that all of 2 myxofibrosarcomas were Mdm2(+)/p53(+). Conclusions: In conclusion, we speculated that both radiation- induced and de novo sarcomagenesis are not due to a unique genetic mechanism. Mdm2- expression without p53 overexpression in 1 case of RIS decreases the future possibility of applying Mdm2 inhibitors on a subset of these difficult tumors.
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Citations
Citations to this article as recorded by  - Radiation-induced osteosarcoma in the head and neck region: Case report and literature review
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Oral Oncology.2025; 162: 107216. CrossRef - Radiation-Induced Sarcomas of the Head and Neck: A Systematic Review
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Advances in Therapy.2021; 38(1): 90. CrossRef - Genomic Characterization of Radiation-Induced Intracranial Undifferentiated Pleomorphic Sarcoma
Christopher S. Hong, Edwin Partovi, James Clune, Anita Huttner, Henry S. Park, Sacit Bulent Omay, Balraj Mittal
Case Reports in Genetics.2021; 2021: 1. CrossRef - Radiation-Induced Sarcoma of the Head and Neck: A Review of the Literature
Lorenzo Giannini, Fabiola Incandela, Marco Fiore, Alessandro Gronchi, Silvia Stacchiotti, Claudia Sangalli, Cesare Piazza
Frontiers in Oncology.2018;[Epub] CrossRef
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