Personalized Medicine Digoxin Theraphy in Individuals with MDR Gene Polymorphism
Journal Title: Indonesian Journal of Clinical Pharmacy - Year 2015, Vol 4, Issue 2
Abstract
Digoxin is one of digitalis drugs. Wider applicability to heart failure and arrhythmias (supraventricular) requires fairly strict scrutiny because of its narrow therapeutic index. Digoxin is a substrate of P-glycoprotein (P-gp) encoded by multi drugs resistance-1 (MDR1). MDR-1 gen located on chromosome 7q21.1. This gene contains 28 exons that encoded a protein of 1280 amino acids. This gene plays an important role in the absorption, distribution and elimination of many drugs. MDR1C3435T polymorphism occurs in exon 26. There are three types of MDR1C3435T gene namely MDR1C3435T CC, MDR1C3435T CT and MDR1C3435T TT. These polymorphisms will affect to the formation of P-gp and consequently to change the kinetic profile of digoxin. The change of kinetic profile causes changes in the digoxin blood levels. The method used in this review is data search based on pubmed, medline, and embase with keywords MDR and digoxin. There are several different studies of the influence of polymorphisms MDR1C3435T on blood digoxin levels. Increased levels of digoxin in the blood due to polymorphism of MDR1C3435T will be at risk of digitalis intoxication. Long-term digoxin treatment or large dose should consider the patient’s genetic profile. Distribution of polymorphism of MDR1C3435T in Javanese population is approximately TT (0,10), CT (0,52), and CC(0, 38).
Authors and Affiliations
Em Sutrisna
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