Target intelligence / Profile preview

Drug-metabolizing enzyme (DME)

Target
DME
Molecular classification
Enzyme, Oxidoreductase (for some, e.g., cytochrome P450 family), Transferase (e.g., UDP-glucuronosyltransferase, sulfotransferase), Hydrolase (e.g., esterases)
01

Overview

Drug-metabolizing enzymes are a collection of primarily hepatic enzymes that chemically modify drugs and xenobiotics through a series of reactions classified as Phase I (e.g., oxidation, reduction, hydrolysis via cytochrome P450, flavin monooxygenases, esterases) and Phase II (conjugation via UDP-glucuronosyltransferase, sulfotransferase, acetyltransferase). These enzymes determine the rate and mechanism of drug elimination, impact patient response through genetic variability, and constitute key determinants in drug-drug interactions, efficacy, and toxicity. Their activity plays essential roles in both therapeutic success and risks, influencing treatment outcomes and supporting personalized medicine approaches.

Other names
Drug metabolism enzymeXenobiotic metabolizing enzymeDMEPhase I enzymePhase II enzyme
02

Mechanism of action

Drug oxidation (CYP450-dependent) Drug reduction Hydrolysis of esters/amides Drug conjugation (e.g., glucuronidation, sulfation, acetylation) Inhibition/Induction by co-administered drugs, affecting metabolism rates

03

Biological functions

Biotransformation (oxidation, reduction, hydrolysis, conjugation)DetoxificationDrug metabolismMetabolic activation (sometimes converting prodrugs or environmental carcinogens into active forms)Maintenance of homeostasis for endogenous compounds
04

Disease associations

Cancer (activation or detoxification of carcinogens)Drug toxicity/adverse drug reactionsMultidrug resistancePharmacogenetic syndromes (due to enzyme polymorphisms)Other, e.g., influence on cardiovascular/neurological drug response
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Safety considerations

Drug-drug interactions due to enzyme inhibition or inductionToxicity from accumulation or metabolic activation of drugsGenetic polymorphisms causing variable drug response (poor, intermediate, extensive, ultra-rapid metabolizers)Risk of carcinogenesis due to activation of procarcinogens
06

Interacting drugs

Statins

8 more in the full profile.

07

Biomarkers

CYP2D6 genotype (used for patient selection, dosing for many psychoactives and opioids)CYP2C19 genotype (used for clopidogrel efficacy)CYP2C9 genotype (used for warfarin dosing)Specific DME activity measurements (phenotyping for metabolic status)

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