H-ras oncogene mutation in dedifferentiated chondrosarcoma

Polymerase chain reaction-restriction fragment length polymorphism analysis

Akio Sakamoto, Yoshinao Oda, Toshisada Adachi, Yumi Oshiro, Sadafumi Tamiya, Kazuhiro Tanaka, Shuichi Matsuda, Yukihide Iwamoto, Masazumi Tsuneyoshi

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Dedifferentiated chondrosarcomas, which are known for their poor prognosis, are characterized by conventional chondrosarcoma with high-grade anaplastic components. Activating mutations in ras genes are a common genetic abnormality in human malignancies. The presence of point mutations at codons 12 and 13 of the H-ras gene was studied in 20 formalin-fixed paraffin-embedded chondrosarcomas, comprising 11 cases of conventional chondrosarcoma (six Grade 1 cases and five Grade 2 cases) and nine cases of dedifferentiated chondrosarcoma, using polymerase chain reaction-restriction fragment length polymorphism and direct sequencing analysis. H-ras mutations were only seen in two out of the nine cases of dedifferentiated chondrosarcoma (2/9, 22%) and they were not seen in any of the cases of conventional chondrosarcoma (0/11, 0%). Dedifferentiated chondrosarcomas had a worse prognosis than conventional chondrosarcomas (P < .01); among the patients with dedifferentiated chondrosarcomas, those with H-ras mutation (n = 2) tended to have a worse prognosis than those without (n = 7), although the difference was not statistically significant (P = 0.068). Our results would seem to suggest that H-ras mutation may occur during the course of dedifferentiation and may also have some effect on malignant potential.

Original languageEnglish
Pages (from-to)343-349
Number of pages7
JournalModern Pathology
Volume14
Issue number4
DOIs
Publication statusPublished - Apr 25 2001

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Chondrosarcoma
ras Genes
Restriction Fragment Length Polymorphisms
Polymerase Chain Reaction
Mutation
Point Mutation
Codon
Paraffin
Formaldehyde

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine

Cite this

H-ras oncogene mutation in dedifferentiated chondrosarcoma : Polymerase chain reaction-restriction fragment length polymorphism analysis. / Sakamoto, Akio; Oda, Yoshinao; Adachi, Toshisada; Oshiro, Yumi; Tamiya, Sadafumi; Tanaka, Kazuhiro; Matsuda, Shuichi; Iwamoto, Yukihide; Tsuneyoshi, Masazumi.

In: Modern Pathology, Vol. 14, No. 4, 25.04.2001, p. 343-349.

Research output: Contribution to journalArticle

Sakamoto, A, Oda, Y, Adachi, T, Oshiro, Y, Tamiya, S, Tanaka, K, Matsuda, S, Iwamoto, Y & Tsuneyoshi, M 2001, 'H-ras oncogene mutation in dedifferentiated chondrosarcoma: Polymerase chain reaction-restriction fragment length polymorphism analysis', Modern Pathology, vol. 14, no. 4, pp. 343-349. https://doi.org/10.1038/modpathol.3880313
Sakamoto, Akio ; Oda, Yoshinao ; Adachi, Toshisada ; Oshiro, Yumi ; Tamiya, Sadafumi ; Tanaka, Kazuhiro ; Matsuda, Shuichi ; Iwamoto, Yukihide ; Tsuneyoshi, Masazumi. / H-ras oncogene mutation in dedifferentiated chondrosarcoma : Polymerase chain reaction-restriction fragment length polymorphism analysis. In: Modern Pathology. 2001 ; Vol. 14, No. 4. pp. 343-349.
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