CYP2C19 – Metabolizing medications

The CYP2C19 enzyme is responsible for the breakdown of several popular drugs including proton pump inhibitors (Prilosec, Nexium, Prevacid), certain anti-epileptics, and an antiplatelet drug (Plavix).  CYP2C19 is also involved in activating and breaking down some hormones such as progesterone. There are variants of…

Liver Detox Genes: CYP2C9 Genotypes and Drug Metabolism

Have you ever wondered why certain medications don’t work well for you? Genetic variants can change how fast or how slow the medication is broken down in your body. CYP2C9 is a gene that codes for an enzyme that metabolizes quite a few medications…

CYP2D6: Metabolism of many OTC and prescription medicines

Say you aren’t feeling well, have had a cold for a week, and can’t sleep…  You’re just plain miserable.  And in your sleep deprived state, you decide to take some Nyquil (or another cough syrup containing dextromethorphan). Some people may get relief and finally get…

Liver Detox Genes – CYP2A6

This is part of an ongoing series on the genes involved in Phase I detoxification. The CYP2A6 enzyme is involved in the metabolism of nicotine, several cancer drugs,  valproic acid, and coumarin. (Full list of drugs on Wikipedia). The hormone estradiol is an inducer of…

CYP1A2 – Breaking down caffeine and more

The CYP1A2 enzyme is involved in the metabolism of xenobiotics (caffeine, aflatoxin B1, and acetaminophen) and is induced by the polycyclic aromatic hydrocarbons (PAH’s) that are found in cigarette smoke.  It metabolizes some pro-carcinogens into carcinogenic intermediates. CYP1A2 is also induced (activated) by cruciferous…

CYP1A1: Detoxifying Cigarette Smoke and Estrogen

This is part of a series on the genes involved in phase I and phase II detoxification. CYP1A1 is a gene that codes for an enzyme that breaks down (metabolizes) a few different substances.  It is involved in the metabolism of poly-aromatic hydrocarbons (PAH) in the…