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Analysis of fumarate hydratase mutations in a population-based series of early onset uterine leiomyosarcoma patients.
- Source :
-
International journal of cancer [Int J Cancer] 2006 Jul 15; Vol. 119 (2), pp. 283-7. - Publication Year :
- 2006
-
Abstract
- Germline mutations in fumarate hydratase (FH) gene at 1q43 predispose to hereditary leiomyomatosis and renal cell cancer (HLRCC) syndrome. In HLRCC, the most common clinical features are leiomyomas of the skin and uterus, and in a subset of the families, renal cell cancer (RCC) and uterine leiomyosarcoma (ULMS) occur frequently at young age. This study was conducted to evaluate the possible contribution of FH mutations in a population-based series of early onset (< or = 45 years) ULMSs. Eighty-one cases were identified through the national cancer registry, and samples from 67 cases (83%) were available for FH mutation screening and analysis of allelic imbalance (AI) at the FH locus. Seventeen percent of tumors showed AI. In the mutation analysis, a novel missense mutation K424R was found. The mutation was also found from the patient's normal tissue. To study whether this variant has functional consequences, FH enzyme activity assay was performed in a cell model. The activity of the mutated protein was significantly reduced as compared to wild type (p = 0.009). This study shows that FH germline mutations can occur in seemingly nonsyndromic cases of ULMS (1/67, 1.5%). It appears that on the population level hereditary FH defects do play a role in pathogenesis of sporadic early onset ULMSs, albeit rarely.<br /> (2006 Wiley-Liss, Inc.)
- Subjects :
- Adolescent
Adult
Age of Onset
Aged
Allelic Imbalance
Amino Acid Sequence
Arginine
Child
Child, Preschool
DNA Mutational Analysis
DNA, Neoplasm analysis
Female
Humans
Infant
Lysine
Male
Middle Aged
Fumarate Hydratase genetics
Germ-Line Mutation
Leiomyosarcoma enzymology
Leiomyosarcoma genetics
Mutation, Missense
Uterine Neoplasms enzymology
Uterine Neoplasms genetics
Subjects
Details
- Language :
- English
- ISSN :
- 0020-7136
- Volume :
- 119
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- International journal of cancer
- Publication Type :
- Academic Journal
- Accession number :
- 16477632
- Full Text :
- https://doi.org/10.1002/ijc.21798