Biomarkers in Medicine

Pharmacogenomic Biomarkers

Author(s): Zeynep Gizem Todurga Seven*, Deniz Özen and Sibel Özyazgan

Pp: 309-377 (69)

DOI: 10.2174/9789815040463122010014

* (Excluding Mailing and Handling)


Why does the usual dose of medication work for a person while another individual cannot give the expected response to the same drug? On the other hand, how come half of the usual dose of an analgesic relieves an individual’s pain immediately, as another man continue to suffer even after taking double dose? Although a treatment method has been successfully used in majority of the population for many years, why does the same therapy cause serious side effects in another region of the world? Most presently approved therapies are not effective in all patients. For example, 20-40% of patients with depression respond poorly or not at all to antidepressant drug therapy. Many patients are resistant to the effects of antiasthmatics and antiulcer drugs or drug treatment of hyperlipidemia and many other diseases. The reason for all those is basically interindividual differences in genomic structures of people, which are explained in this chapter in terms of the systems and the most frequently used drugs in clinical treatment.

Keywords: Adverse reactions, Carriers, Clinical pharmacology, Cytochrome P- 450 enzyme family, Drug response, Enzyme activity, Extensive metabolizer, Intermediate metabolizer, Metabolism, Optimal dosage, Personalized medicine, Pharmacodynamics, Pharmacogenetics, Pharmacogenomic biomarkers, Pharmacokinetics, Polymorphism, Poor metabolizer, Targeted treatment, Transporter molecules, Ultra-rapid metabolizer.

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