Analysis of uroporphyrinogen decarboxylase complementary DNAs in sporadic porphyria cutanea tarda.
Gastroenterology
; 105(1): 165-9, 1993 Jul.
Article
em En
| MEDLINE
| ID: mdl-8099886
ABSTRACT
BACKGROUND:
Sporadic porphyria cutanea tarda (S-PCT) has been considered an acquired disease because of the generation of liver-specific inhibitors of uroporphyrinogen decarboxylase (URO-D) activity. Several families have been described with S-PCT in multiple generations, raising the possibility of an inherited basis for the disease. To determine if S-PCT is associated with mutant URO-Ds that might be sensitive to liver-specific inhibitors, a molecular analysis of genomic and hepatocellular URO-Ds was undertaken.METHODS:
Total RNA from lymphoid cell lines from three unrelated patients with S-PCT and poly A+ RNA from liver biopsy samples from two additional patients was used as a template for single-stranded cDNA synthesis, and URO-D sequences were amplified and sequenced. DNA prepared from peripheral blood leukocytes was used as a template to polymerase chain reaction (PCR) amplify the promoter region of the URO-D gene. Sequencing of PCR products was performed completely in both directions by the chain termination method using a variety of custom oligonucleotide primers.RESULTS:
Ten URO-D alleles were sequenced, and no mutations were found. The promoter region of the URO-D gene was also normal.CONCLUSIONS:
It is concluded that S-PCT is not due to mutations at the URO-D locus. If inherited factors are involved, other loci must be affected.
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Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Uroporfirinogênio Descarboxilase
/
DNA
/
Porfiria Cutânea Tardia
Limite:
Adult
/
Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Gastroenterology
Ano de publicação:
1993
Tipo de documento:
Article