Relationships between paraoxon and 2-coumaranone hydrolytic activities in sera genotyped for PON1 Q192R polymorphism.
Clin Biochem
; 42(15): 1512-6, 2009 Oct.
Article
em En
| MEDLINE
| ID: mdl-19615988
ABSTRACT
OBJECTIVES:
To set-up a method for a direct evaluation in human serum of paraoxonase enzymatic activities, establishing a possible correlation with Q192R genotype polymorphism. DESIGN ANDMETHODS:
101 different human serum samples were genotyped for paraoxonase Q192R polymorphism by PCR restriction analysis, and evaluated spectrophotometrically with regard to paraoxon and 2-coumaranone hydrolytic activities. Both activities of paraoxonase were assayed, quantified through normalization by arylesterase activity, and compared with the data concerning Q/R genetic polymorphism.RESULTS:
The mean normalized paraoxonase activity was found to be significantly higher in RR than in QQ human sera (3.99+/-0.6 versus 1.32+/-0.44; P<0.0001); instead, the 2-coumaranone hydrolysis showed an opposite trend (0.10+/-0.02 versus 0.23+/-0.04, in RR and QQ sera respectively; P<0.0001).CONCLUSIONS:
These methods were successfully applied to the whole serum, suggesting a possible use of this approach for a clinically relevant phenotypic characterization.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Paraoxon
/
Polimorfismo Genético
/
Benzofuranos
/
Inibidores da Colinesterase
/
Arildialquilfosfatase
Limite:
Adult
/
Humans
/
Middle aged
Idioma:
En
Revista:
Clin Biochem
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Itália