Advances in Clinical and Experimental Medicine

Title abbreviation: Adv Clin Exp Med
JCR Impact Factor (IF) – 2.1
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Index Copernicus  – 161.11; MEiN – 140 pts

ISSN 1899–5276 (print)
ISSN 2451-2680 (online)
Periodicity – monthly

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Advances in Clinical and Experimental Medicine

2019, vol. 28, nr 12, December, p. 1621–1626

doi: 10.17219/acem/110322

Publication type: original article

Language: English

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Distribution of polymorphisms in the CYP2C19 and ABCB1 genes among patients with acute coronary syndrome in Lower Silesian population

Tomasz Wójcik1,A,D, Paweł Szymkiewicz1,A,D, Jerzy Wiśniewski2,B,C, Arleta Lebioda3,B,C, Anna Jonkisz3,B,C, Andrzej Gamian2,C,E, Wiktor Kuliczkowski1,A,E, Krzysztof Ściborski1,D, Andrzej Mysiak1,A,E, Marcin Protasiewicz1,A,D,E,F

1 Department and Clinic of Cardiology, Wroclaw Medical University, Poland

2 Department and Section of Biochemistry, Wroclaw Medical University, Poland

3 Section of Molecular Techniques, Wroclaw Medical University, Poland


Background. Dual antiplatelet therapy (DAPT) with aspirin and clopidogrel administered to treat patients with acute coronary syndrome (ACS) is still being used. However, despite the proven efficacy of this treatment regimen, thromboembolic complications have been observed in some individuals. The reason for this phenomenon is linked to the so-called increased responsiveness of platelets despite high platelet resistance (HPR). A significant role in HPR is attributed to genetically determined differences in the absorption and activation of clopidogrel.
Objectives. The aim of the study was to assess the incidence of polymorphisms of the ABCB1 and CYPC19 genes that encode proteins involved in the absorption and metabolism of clopidogrel.
Material and Methods. The analysis was performed in 199 consecutive patients from Lower Silesian voivodeship (Poland) who underwent coronary angioplasty with stenting for ACS. The single nucleotide polymorphism of the CYP2C19 and ABCB1 genes was performed using a mini sequencing or restriction fragment length polymorphism method.
Results. The results of this study revealed the high incidence of patients who may be unresponsive to antiplatelet treatment due to genetic causes. The CYPC19*2 allele in the form of homozygote or mutation heterozygote appeared in 26.1% of the study population. ABCB1 (C3435C> T) polymorphism was associated with 84% of patients. The total incidence of allelic disorders of low drug absorption and metabolism reached 14.6%.
Conclusion. The data obtained should prompt clinicians to use more recent antiplatelet agents (ticagrelor or prasugrel) first, instead of clopidogrel.

Key words

ABCB1, clopidogrel, Lower Silesia, polymorphism, CYP2C9

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