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Cytochrome P450 2D6 (CYP2D6) genotyping on postmortem blood as a supplementary tool for interpretation of forensic toxicological results.

Abstract：

:Debrisoquine hydroxylase (CYP2D6) is involved in the metabolism of many toxicologically important drugs. The gene encoding for this enzyme displays a polymorphic distribution in all populations examined. We report a study on 46 cases, where analyses of the CYP2D6 gene were conducted on postmortem femoral blood in order to investigate the occurrence of poor metabolizers (PM). A polymerase chain reaction (PCR) method, designed and routinely used for therapeutic drug monitoring, was employed, only slightly modified. Samples from 22 cases, where the parent drug to metabolite ratio was unexpectedly high were analyzed as well as samples from 24 control cases. Genotyping could be carried out in all but one case. Previous freezing or addition of potassium fluoride as preservative did not prevent analysis. Only one PM (from the control group) was discovered, implying an occurrence of only 2.2% as compared to the reported frequency of approx. 7% in Sweden. Among the extensive metabolizers (EM), however, a number of individuals with mutated genes were identified. Although it seems reasonable to suspect a PM genotype in cases with a high concentration of a drug metabolized by CYP2D6, but without suspicion of acute overdose, our study does not support the opinion that this interpretation pitfall is particularly common. This study rather indicates that drug interactions in EMs constitute a more frequent and important problem.

journal_name

Forensic Sci Int

journal_title

Forensic science international

authors

Druid H,Holmgren P,Carlsson B,Ahlner J

doi

10.1016/s0379-0738(98)00169-8

keywords:

subject

Has Abstract

pub_date

1999-01-04 00:00:00

pages

25-34

issue

1

eissn

0379-0738

issn

1872-6283

pii

S0379-0738(98)00169-8

journal_volume

99

pub_type

杂志文章

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