Cytochrome P450 - CYP2C9 Genotyping in Warfarin Drug Therapy Optimization (CROSBI ID 493596)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Štefanović, Mario ; Topić, Elizabeta ; Samardžija, Marina ; Šimundić, Ana-Maria ; Begonja, Antonija
engleski
Cytochrome P450 - CYP2C9 Genotyping in Warfarin Drug Therapy Optimization
S– warfarin is an anticoagulant therapy drug and its often unpredictable dose response results at least in part due to genetic differences in CYP2C9 enzyme metabolic capacity. Besides wild type- CYP2C9*1, there are mutant alleles CYP2C9*2 and CYP2C9*3 that in homozygotes code enzymes with activities of only 16-20% and 5% of total wild type activity, respectively. Our aim was to investigate the possibility of warfarin dosage prediction by CYP2C9 polymorphism genotyping. We genotyped 181 patients (43.6 % males, mean age 60.2 ; SD=14.5) by PCR-RFLP method as reported by Nasu K. et al., 1997. Patients were receiving warfarin in doses needed for maintaining prothrombin time within INR range 1.5-2.5. Results showed significantly higher warfarin mean daily dose (DD) among 104 wild type homozygous patients (DD=4.4mg ; SD=1.9) compared to 77 patients with at least one mutated allele (DD= 3.7mg ; SD 1.7, p=0.010) and 10 patients with both mutant alleles (DD=2.6mg ; SD=1.4, p=0.004). Patients were also divided into groups according to warfarin median daily dose: among DD<4.1mg group (90 patients), we found 71% wild type (1*), and 29% mutated (2* and 3*) alleles. These 2* and 3* allelic frequencies were significantly higher (p=0.027) than in DD>4.1mg group (91 patients) (81% wild type (1*), and 19% mutated (2* and 3*) alleles). Genotype frequencies did not differ significantly. Results of our investigation are concordant to other author's findings and suggest a relationship of CYP2C9 defective alleles with lower warfarin doses. Therefore, CYP2C9 genotyping could be of predicting and optimizing importance in anticoagulant drug therapy.
CYP2C9; warfarin; anticoagulant therapy
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Podaci o prilogu
114-114-x.
2003.
objavljeno
Podaci o matičnoj publikaciji
The third European-American school in forensic genetics and Mayo clinic course in advanced molecular and cellular medicine - Final program and abstracts
Primorac, D. ; Erceg Ivkošić, I. ; Ivkošić, A . ; Vuk-Pavlović, S. ; Schanfield, M.
Zagreb: Studio Hrg
Podaci o skupu
The third European-American school in forensic genetics and Mayo clinic course in advanced molecular and cellular medicine
poster
01.09.2003-05.09.2003
Zagreb, Hrvatska