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Mutational analysis of the NM23.H1 gene in human breast cancer
- Source :
- Cancer genetics and cytogenetics. 121(2)
- Publication Year :
- 2000
-
Abstract
- NM23.H1 is a protein connected with tumor progression. Loss of heterozygosity and reduced expression of the gene have been associated with poor prognosis and increased incidence of metastases in many epithelial tumors. The aim of this study was to detect the presence of NM23.H1 point mutations or small deletions in human breast carcinomas by using the single-strand-conformation polymorphism (SSCP) technique. Mutational analysis was performed on 76 breast tumors, 10 of which had allelic deletion of the gene. The NM23.H1 mRNA content also was evaluated in each sample. Only a C-to-A transversion leading to a stop codon was found in the 5' untranslated region of exon 1. A polymorphic SSCP pattern was identified in exon 1; direct sequencing showed a C-to-T transition 30 nucleotides upstream from the 5' splice site flanking exon 1. None of the tumors analyzed presented both alleles inactivated. Our results suggest that NM23.H1 is rarely inactivated by point mutations.
- Subjects :
- Untranslated region
Cancer Research
Point mutation
DNA Mutational Analysis
Loss of Heterozygosity
Single-strand conformation polymorphism
Breast Neoplasms
Biology
Middle Aged
NM23 Nucleoside Diphosphate Kinases
Molecular biology
Stop codon
Loss of heterozygosity
Exon
Nucleoside-Diphosphate Kinase
Genetics
Cancer research
Humans
RNA, Messenger
Transversion
Molecular Biology
Polymorphism, Single-Stranded Conformational
Monomeric GTP-Binding Proteins
Transcription Factors
Subjects
Details
- ISSN :
- 01654608
- Volume :
- 121
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Cancer genetics and cytogenetics
- Accession number :
- edsair.doi.dedup.....d3d1ff78f7c92ebaaf924a74ae9b9847