Inactivation of the retinoblastoma gene in a human lung carcinoma cell line detected by single-strand conformation polymorphism analysis of the polymerase chain reaction product of cDNA.
Oncogene
; 6(1): 37-42, 1991 Jan.
Article
em En
| MEDLINE
| ID: mdl-1992444
ABSTRACT
Combined use of a simple, sensitive method of DNA analysis of nucleotide substitutions, namely, single-strand conformation polymorphism analysis of polymerase chain reaction products (PCR-SSCP), and the reverse transcriptase reaction (RT) is an effective method for mRNA analysis. We used this RT-PCR-SSCP method to detect abnormal retinoblastoma (RB) gene transcripts in human tumor cell lines. Results showed the presence of two types of RB gene transcripts in a giant cell lung carcinoma cell line Lu65 a minor mRNA species with a base substitution that created a stop codon in the nucleotide sequence corresponding to exon 2 of the gene, and a major species of mRNA without the nucleotide sequence corresponding to that of exon 2. PCR-SSCP analysis of the genomic DNA also revealed that Lu65 cells contained the mutated RB allele, but not the normal allele. These results suggested that in Lu65 cells, both RB alleles were inactivated. The transcript without the exon 2 sequence, probably due to alternative splicing, was also found in all the other human cells examined, as a very minor species.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Regulação Neoplásica da Expressão Gênica
/
Genes do Retinoblastoma
/
Neoplasias Pulmonares
Limite:
Humans
Idioma:
En
Revista:
Oncogene
Assunto da revista:
BIOLOGIA MOLECULAR
/
NEOPLASIAS
Ano de publicação:
1991
Tipo de documento:
Article
País de afiliação:
Japão