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Genetic Substudy Shows Fewer Major Cardiovascular Events With Ticagrelor (BRILINTA) Regardless of Relevant Genetic Variability in ACS Patients
Date:8/29/2010

er year for low, 8.5% per year for intermediate, and 8.8% per year for high expression groups. Primary efficacy event rates for clopidogrel were: 10.5% per year for low, 9.8% per year for intermediate, and 11.9% per year for high expression groups. There was no relationship between the ABCB1 genotype and bleeding.

"This substudy is the largest database of ACS patients to date to examine the impact of genetic make-up on response to oral antiplatelet treatment.  As this substudy showed, the effects seen with ticagrelor were independent of genetic variability in CYP2C19 or ABCB1," said Professor Lars Wallentin, primary investigator of the PLATO genetic substudy and Professor of Cardiology and Research Director at the Uppsala University, Sweden.

The substudy was designed to explore the interaction of CYP2C19 and ABCB1 genes on ticagrelor and clopidogrel efficacy and safety. 10,285 ACS patients were genotyped for CYP2C19 and ABCB1 status. On a background of aspirin, patients in the ticagrelor group were given a 180 mg loading dose and a 90 mg twice-daily maintenance dose, while patients in the clopidogrel group were given a 300 mg to 600 mg loading dose and 75 mg once-daily maintenance dose, for 6 to 12 months.

About ACS

ACS is an umbrella term for conditions that result from a reduction in blood flow to the heart muscle. These conditions range from UA (chest pain) to myocardial infarction (MI) (heart attack):

  • STEMI is a type of heart attack in which the coronary artery is generally blocked off by a blood clot, and as a result virtually all the heart muscle being supplied by the affected artery starts to die.
  • UA/NSTEMI is a type of heart attack in which a blood clot partly occludes an artery and as a result only a portion of the heart muscle being supplied by the affected artery dies. UA is one of the types of ACS, a series of conditions most common
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