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. 1999 Apr;52(2):64–67. doi: 10.1136/mp.52.2.64

Malignant fibrous histiocytomas and H-ras-1 oncogene point mutations.

P Rieske 1, J Bartkowiak 1, A Szadowska 1, M Debiec-Rychter 1
PMCID: PMC395675  PMID: 10474683

Abstract

AIMS: To investigate the types and the frequencies of H-ras-1 gene mutations in malignant fibrous histiocytomas. METHODS: Thirty five samples of malignant fibrous histiocytoma tissue were searched for point mutations within "hot spot" codons 12 and 13 of the H-ras-1 oncogene by the specific "nested" polymerase chain reaction followed by restriction fragment length polymorphism (PCR-RFLP) and a direct cycle sequencing procedure. RESULTS: In contrast to previous reports, none of the tumours contained a point mutation or any other changes within or around the hot spot gene sequences. CONCLUSIONS: These data indicate that H-ras-1 oncogenic activation is not required in the molecular pathway of malignant fibrous histiocytoma formation and cannot be used as a discriminating factor for diagnostic sarcoma typing.

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