CYP2D6, N-acetylation, and xanthine oxidase activity in cystic fibrosis.

Abstract:

STUDY OBJECTIVE:To determine the activity of CYP2D6, N-acetylation, and xanthine oxidase, three drug-metabolizing enzyme systems, in patients with cystic fibrosis and compare the findings with those in individuals without the disease. DESIGN:Prospective cohort study. SETTING:General pediatrics service. PATIENTS:Fifty-nine patients with cystic fibrosis and 480 healthy Caucasian volunteers. INTERVENTIONS:Enzyme activity was determined based on urinary molar metabolite ratios of caffeine and dextromethorphan probes. MEASUREMENTS AND MAIN RESULTS:The percentage of poor metabolizers of CYP2D6 in patients with cystic fibrosis was not different from that in the control group (p = 0.45). N-Acetylation activity was significantly lower in the patients (p = 0.007), but no statistically significant difference was found in xanthine oxidase activity (p = 0.12). CONCLUSION:The activity of these drug-metabolic pathways does not appear to be increased in cystic fibrosis. Whether the activity of other pathways is increased, thus providing a partial explanation for the generally increased drug clearance in this disease, remains to be determined.

journal_name

Pharmacotherapy

journal_title

Pharmacotherapy

authors

Bosso JA,Liu Q,Evans WE,Relling MV

subject

Has Abstract

pub_date

1996-09-01 00:00:00

pages

749-53

issue

5

eissn

0277-0008

issn

1875-9114

journal_volume

16

pub_type

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