Lamotrigine-N2-glucuronic acid: a key metabolite in drug metabolism research 133310-19-7
Lamotrigine N2-Glucuronide is the main inactive metabolite generated by the glucuronidation metabolism of the first-line anti-epileptic drug lamotrigine in the human body. As a standard material in the field of drug metabolism research and therapeutic drug monitoring, this compound has irreplaceable core value for understanding the elimination process of lamotrigine in the body, assessing metabolic differences among individuals, and exploring potential drug interactions.
Lamotrigine N2-Glucuronide is the main inactive metabolite generated by the glucuronidation metabolism of the first-line anti-epileptic drug lamotrigine in the human body. As a standard material in the field of drug metabolism research and therapeutic drug monitoring, this compound has irreplaceable core value for understanding the elimination process of lamotrigine in the body, assessing metabolic differences among individuals, and exploring potential drug interactions.
Chemical Information
Chemical name: Lamotrigine N2-Glucuronide
Generic name: lamotrigine-N2-glucuronide
Chemical formula: C15H16Cl2N5O6
Molecular weight: 433.226 g/mol
CAS number: 133310-19-7
Category: Metabolite Glucuronide
Structural features
The structure of lamotrigine-N2-glucuronic acid marks a key step in the biotransformation of lamotrigine:
Covalent binding site: Glucuronic acid specifically binds to the N2 nitrogen atom on the triazine ring of the lamotrigine molecule through a glycosidic bond. Binding at this site is the main metabolic pathway for lamotrigine catalyzed by uridine diphosphate glucuronosyltransferase.
Significantly enhanced polarity: The introduction of a hydrophilic glucuronic acid group greatly increases the polarity of the originally fat-soluble parent drug molecule. This structural change directly determines its pharmacokinetic properties.
Metabolic inactivation sign: The conjugate itself has no significant pharmacological activity. Its formation is the core mechanism of the body to detoxify and prepare lamotrigine for excretion, promoting the efficient elimination of the drug through bile or urine.
Main applications and value
The gold standard in drug metabolism and pharmacokinetics research
As the main metabolite of lamotrigine in the human body, lamotrigine-N2-glucuronic acid is an essential reference standard for quantitative bioanalysis. In preclinical and clinical pharmacokinetic studies, accurate determination of the concentration ratio to that of the parent drug in plasma and urine is crucial to fully elucidating the clearance, metabolism rate and biotransformation profile of lamotrigine.
Reliable basis for therapeutic drug monitoring and individualized medication
In the long-term treatment and management of patients with epilepsy, therapeutic drug monitoring is key to optimizing efficacy and reducing adverse reactions. Simultaneous monitoring of the concentrations of lamotrigine and its N2-glucuronide metabolite can more accurately assess the patient's metabolic phenotype. Especially in special populations (such as pregnant women, patients with liver and kidney dysfunction, and patients taking combined medications), changes in metabolite concentrations can provide in-depth scientific basis for dose adjustment and help achieve individualized dosing.
An important tool for drug interaction and metabolic enzymology research
The metabolism of lamotrigine is susceptible to changes by other drugs. Using lamotrigine-N2-glucuronic acid as the analytical internal standard, we can conduct in-depth studies on how drugs that affect UGT enzyme activity (such as valproic acid, oral contraceptives, etc.) change the metabolic pathway of lamotrigine, thereby elucidating the mechanism of drug interactions. It is also a key probe molecule for in vitro studies of isoenzyme activity and genetic polymorphisms such as UGT1A4.
Components of Metabolite Safety Assessment
Although its activity is low, in the comprehensive drug safety evaluation system, the qualitative and quantitative analysis of major metabolites is an important part of regulatory requirements. Ensuring the accurate identification and detection of this metabolite is one of the basic tasks for assessing the overall safety of a drug.
Conclusion
Lamotrigine-N2-glucuronide is far from a simple metabolic endpoint. It is a core biomarker that decodes the fate of lamotrigine in the body and ensures the safety and effectiveness of clinical medication. From promoting research on basic metabolic mechanisms to supporting precise clinical monitoring practices, this standard provides an indispensable molecular tool for the field of drug development and rational drug use, and continues to empower the development of safer and more effective anti-epileptic treatment strategies.
The above information is provided by the editor of KASONS and is for scientific research only.