N-demethylation
N-demethylation - Related Videos
07:02
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Cited by 1 •
2012
We present a method for using MALDI mass spectrometry and reductive methylation chemistry to quantify changes in lysine methylation.
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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes. The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
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Cited by 1 •
2016
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09:47
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Cited by 2 •
2015
The goal of this video is to demonstrate how to perform automated DNA extraction from formalin-fixed paraffin-embedded (FFPE) reference standard cell lines and digital droplet PCR (ddPCR) analysis to detect rare mutations in a clinical setting. Detecting mutations in FFPE samples demonstrates the clinical utility of ddPCR in FFPE samples.
FAQs
The cytochrome P450 oxidation step does not directly produce the final products. It first creates an unstable intermediate that breaks down into a secondary amine and formaldehyde. Recognizing this sequence helps researchers connect enzyme activity with the appearance of metabolites and distinguish the chemical pathway responsible for a drug’s transformation.
The resulting secondary amine may not behave like the original compound. Its activity can change the medicine’s potency, duration of action, or toxicity, depending on the properties of that metabolite. Consequently, evaluating the metabolite is necessary when determining whether N-demethylation reduces activity, preserves it, or creates clinically important effects.
Differences in metabolic activity can change how extensively a medicine undergoes this pathway. Variation in the amount or activity of the relevant cytochrome P450 enzymes may therefore influence metabolite formation and alter pharmacokinetics, including how long drug-related effects persist. These differences are important when interpreting patient-to-patient responses and possible toxicity.
Because cytochrome P450-mediated metabolism influences the formation of both the parent drug and its secondary-amine metabolite, changes in metabolic activity can modify drug exposure and metabolite production. Studying this pathway helps researchers identify interactions that may alter pharmacokinetics, therapeutic potency, duration of action, or toxicity when medicines are considered together.
Researchers examine N-demethylation to determine how a candidate compound may be metabolized and whether its products could influence clinical behavior. The findings support pharmacokinetic prediction, assessment of metabolite activity and toxicity, and optimization of compounds during development. This information can guide decisions about whether a chemical structure is likely to produce a useful medicine.
These studies can indicate whether metabolism changes a drug’s potency, duration of action, or toxicity, while also revealing how patient metabolic differences may affect exposure. Such information supports evaluation of clinically relevant metabolites, prediction of pharmacokinetics, and interpretation of variable responses during clinical development and drug-use assessment.