Pharmacogenetics of Clopidogrel in Acute Coronary Syndromes

NCT03347435 | Terminated

• 1 other identifier: 11210
• Study Type: interventional
• Target: 889
• Locations: 1 country
• Sites: 4

Brief Summary

The antiplatelet agent clopidogrel is an effective drug for the prevention of thrombotic events in patients with acute coronary syndromes, and is therefore one of the most frequently prescribed drugs worldwide. Accumulating data suggest that the response to clopidogrel is characterised by significant inter-patient variability in the degree of platelet inhibition and the risk of cardiovascular events. Recent research findings have highlighted the role of genetic variations in determining antiplatelet response variability, and this has aroused interest in genotyping all thienopyridine-eligible patients in order to identify those who would be at increased risk of harm if treated with clopidogrel. This is a prospective, multicentre, randomised study enrolling consecutive patients hospitalised because of an ACS with or without ST-segment elevation. The patients are randomised to undergo or not tests for CYP2C19\*2, CYP2C19\*17 and ABCB1 3435 genetic variants immediately after diagnosis. The genotyping is done using a Q3 System (a compact platform that enables the classic laboratory analysis of DNA by means of real-time PCR). The Q3 has been designed as a low entry-cost, portable, point-of-care instrument for foolproof use by unskilled personnel. The patients randomised to the pharmacogenomic arm receive one of the ADP receptor antagonists (clopidogrel/prasugrel/ticagrelor) on the basis of an algorithm that consider genetic and clinical variables. The patients randomised to the standard treatment arm receive clopidogrel or prasugrel or ticagrelor on the basis of the standard of care (clinical algorithm alone). For each patient, a record is made of the occurrence of cardiovascular death, non-fatal MI, stroke, BARC-defined bleeding, and definite or probable stent thrombosis. The primary endpoint is the composite of death due to cardiovascular causes, non-fatal MI and stroke. The secondary endpoints is the occurrence of definite or probable stent thrombosis, and BARC-defined major bleeding events (types 3-5).

Conditions

Acute Coronary Syndromes

Keywords

clopidogrel; pharmacogenetics; antiplatelet therapy; acute coronary syndromes

Outcome Measures

Primary Outcomes (1)

• Composite of cardiovascular death, non fatal myocardial infarction, stroke and BARC-defined major bleeding events 3 to 5.

  The primary endpoint will be the composite of cardiovascular death, non fatal myocardial infarction, stroke and BARC-defined major bleeding events 3 to 5 at 12 months follow-up.

  12 months

Secondary Outcomes (5)

• occurrence of definite or probable stent thrombosis.

  12 months

• cardiovascular death

  12 months

• non fatal myocardial infarction

  12 months

• stroke

  12 months

• BARC-defined major bleeding events 3 to 5

  12 months

Study Arms (2)

Genotype/ phenotype guided group

EXPERIMENTAL

The patients randomized to the genotype/phenotype guided group undergo genetic tests for CYP2C19\*2, CYP2C19\*17 and ABCB1 3435 genetic variants immediately after diagnosis of ACS and receive one of the ADP receptor antagonists (clopidogrel/prasugrel/ticagrelor) on the basis of an algorithm that consider genetic and clinical variables.

Genetic: genetic tests for CYP2C19*2, CYP2C19*17 and ABCB1 3435

phenotype only guided group

ACTIVE COMPARATOR

The patients randomized to the phenotype only guided group receive clopidogrel or prasugrel or ticagrelor on the basis of the standard of care on the basis of clinical algorithm alone.

Other: clinical algorithm

Interventions

genetic tests for CYP2C19*2, CYP2C19*17 and ABCB1 3435 GENETIC

The CYP2C19\*2 (10q24.1-q24.3; rs4244285), CYP2C19\*17 (10q24.1-q24.3; rs12248560) and ABCB1 3435 (7q21.1; rs1045642) genetic variants will be genotyped using an ST Q3 system. The conventional genotyping methods so far used for diagnostic purposes will not be used in this study because appropriate labs may not be readily available and the processing time is prohibitive. Q3 is a compact platform enabling the classical laboratory analysis of DNA by means of real-time PCR. The Q3 has been designed as a low entry-cost, portable, point-of-care instrument for foolproof use by unskilled personnel. Antiplatelet therapy will be choose on the basis of clinical and genetic algorithm.

Genotype/ phenotype guided group

clinical algorithm OTHER

Antiplatelet therapy will be choose on the basis of clinical algorithm alone

phenotype only guided group

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Diagnosis of ACS (STE-ACS or NSTE-ACS) during the index hospitalisation
• Age \>18 years
• Ability to sign the informed consent form
• Ability to attend scheduled visits

You may not qualify if:

• Cognitive or other causes of an inability to provide informed consent or follow study procedures
• Any contraindication to the use of ADP P2Y12 inhibitors
• Life expectancy \<1 year
• Thrombolytic therapy within the previous 24 hours
• Known ABCB1, CYP2C19 \*2 orCYP2C19 \*17 genotype

Sponsors & Collaborators

• Azienda Ospedaliero-Universitaria di Parma: lead

Study Sites (4)

Ospedale Ramazzini

Carpi, Modena, 41012, Italy

Location

Ospedale di Vaio

Fidenza, Parma, 43036, Italy

Location

Azienda Ospedaliero Universitaria di Parma

Parma, 43123, Italy

Location

Ospedale Guglielmo da Saliceto

Piacenza, 29121, Italy

Location

Related Publications (12)

• Hamm CW, Bassand JP, Agewall S, Bax J, Boersma E, Bueno H, Caso P, Dudek D, Gielen S, Huber K, Ohman M, Petrie MC, Sonntag F, Uva MS, Storey RF, Wijns W, Zahger D; ESC Committee for Practice Guidelines. ESC Guidelines for the management of acute coronary syndromes in patients presenting without persistent ST-segment elevation: The Task Force for the management of acute coronary syndromes (ACS) in patients presenting without persistent ST-segment elevation of the European Society of Cardiology (ESC). Eur Heart J. 2011 Dec;32(23):2999-3054. doi: 10.1093/eurheartj/ehr236. Epub 2011 Aug 26. No abstract available.

  PMID: 21873419 RESULT

• Wallentin L, Becker RC, Budaj A, Cannon CP, Emanuelsson H, Held C, Horrow J, Husted S, James S, Katus H, Mahaffey KW, Scirica BM, Skene A, Steg PG, Storey RF, Harrington RA; PLATO Investigators; Freij A, Thorsen M. Ticagrelor versus clopidogrel in patients with acute coronary syndromes. N Engl J Med. 2009 Sep 10;361(11):1045-57. doi: 10.1056/NEJMoa0904327. Epub 2009 Aug 30.

  PMID: 19717846 RESULT

• Wiviott SD, Braunwald E, McCabe CH, Montalescot G, Ruzyllo W, Gottlieb S, Neumann FJ, Ardissino D, De Servi S, Murphy SA, Riesmeyer J, Weerakkody G, Gibson CM, Antman EM; TRITON-TIMI 38 Investigators. Prasugrel versus clopidogrel in patients with acute coronary syndromes. N Engl J Med. 2007 Nov 15;357(20):2001-15. doi: 10.1056/NEJMoa0706482. Epub 2007 Nov 4.

  PMID: 17982182 RESULT

• Matetzky S, Shenkman B, Guetta V, Shechter M, Beinart R, Goldenberg I, Novikov I, Pres H, Savion N, Varon D, Hod H. Clopidogrel resistance is associated with increased risk of recurrent atherothrombotic events in patients with acute myocardial infarction. Circulation. 2004 Jun 29;109(25):3171-5. doi: 10.1161/01.CIR.0000130846.46168.03. Epub 2004 Jun 7.

  PMID: 15184279 RESULT

• Mega JL, Close SL, Wiviott SD, Shen L, Hockett RD, Brandt JT, Walker JR, Antman EM, Macias W, Braunwald E, Sabatine MS. Cytochrome p-450 polymorphisms and response to clopidogrel. N Engl J Med. 2009 Jan 22;360(4):354-62. doi: 10.1056/NEJMoa0809171. Epub 2008 Dec 22.

  PMID: 19106084 RESULT

• Shuldiner AR, O'Connell JR, Bliden KP, Gandhi A, Ryan K, Horenstein RB, Damcott CM, Pakyz R, Tantry US, Gibson Q, Pollin TI, Post W, Parsa A, Mitchell BD, Faraday N, Herzog W, Gurbel PA. Association of cytochrome P450 2C19 genotype with the antiplatelet effect and clinical efficacy of clopidogrel therapy. JAMA. 2009 Aug 26;302(8):849-57. doi: 10.1001/jama.2009.1232.

  PMID: 19706858 RESULT

• Mega JL, Close SL, Wiviott SD, Shen L, Walker JR, Simon T, Antman EM, Braunwald E, Sabatine MS. Genetic variants in ABCB1 and CYP2C19 and cardiovascular outcomes after treatment with clopidogrel and prasugrel in the TRITON-TIMI 38 trial: a pharmacogenetic analysis. Lancet. 2010 Oct 16;376(9749):1312-9. doi: 10.1016/S0140-6736(10)61273-1.

  PMID: 20801494 RESULT

• Wallentin L, James S, Storey RF, Armstrong M, Barratt BJ, Horrow J, Husted S, Katus H, Steg PG, Shah SH, Becker RC; PLATO investigators. Effect of CYP2C19 and ABCB1 single nucleotide polymorphisms on outcomes of treatment with ticagrelor versus clopidogrel for acute coronary syndromes: a genetic substudy of the PLATO trial. Lancet. 2010 Oct 16;376(9749):1320-8. doi: 10.1016/S0140-6736(10)61274-3.

  PMID: 20801498 RESULT

• Tiroch KA, Sibbing D, Koch W, Roosen-Runge T, Mehilli J, Schomig A, Kastrati A. Protective effect of the CYP2C19 *17 polymorphism with increased activation of clopidogrel on cardiovascular events. Am Heart J. 2010 Sep;160(3):506-12. doi: 10.1016/j.ahj.2010.06.039.

  PMID: 20826260 RESULT

• Mega JL, Simon T, Collet JP, Anderson JL, Antman EM, Bliden K, Cannon CP, Danchin N, Giusti B, Gurbel P, Horne BD, Hulot JS, Kastrati A, Montalescot G, Neumann FJ, Shen L, Sibbing D, Steg PG, Trenk D, Wiviott SD, Sabatine MS. Reduced-function CYP2C19 genotype and risk of adverse clinical outcomes among patients treated with clopidogrel predominantly for PCI: a meta-analysis. JAMA. 2010 Oct 27;304(16):1821-30. doi: 10.1001/jama.2010.1543.

  PMID: 20978260 RESULT

• Sibbing D, Koch W, Gebhard D, Schuster T, Braun S, Stegherr J, Morath T, Schomig A, von Beckerath N, Kastrati A. Cytochrome 2C19*17 allelic variant, platelet aggregation, bleeding events, and stent thrombosis in clopidogrel-treated patients with coronary stent placement. Circulation. 2010 Feb 2;121(4):512-8. doi: 10.1161/CIRCULATIONAHA.109.885194. Epub 2010 Jan 18.

  PMID: 20083681 RESULT

• Notarangelo FM, Maglietta G, Bevilacqua P, Cereda M, Merlini PA, Villani GQ, Moruzzi P, Patrizi G, Malagoli Tagliazucchi G, Crocamo A, Guidorossi A, Pigazzani F, Nicosia E, Paoli G, Bianchessi M, Comelli MA, Caminiti C, Ardissino D. Pharmacogenomic Approach to Selecting Antiplatelet Therapy in Patients With Acute Coronary Syndromes: The PHARMCLO Trial. J Am Coll Cardiol. 2018 May 1;71(17):1869-1877. doi: 10.1016/j.jacc.2018.02.029. Epub 2018 Mar 11.

  PMID: 29540324 DERIVED

MeSH Terms

Conditions

Acute Coronary Syndrome

Interventions

Genetic Testing

Condition Hierarchy (Ancestors)

Myocardial Ischemia; Heart Diseases; Cardiovascular Diseases; Vascular Diseases

Intervention Hierarchy (Ancestors)

Clinical Laboratory Techniques; Diagnostic Techniques and Procedures; Diagnosis; Investigative Techniques; Genetic Techniques; Genetic Services; Health Services; Health Care Facilities Workforce and Services; Diagnostic Services; Preventive Health Services

Study Officials

• Diego Ardissino, MD

  Azienda Ospedaliero-Universitaria di Parma

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Director of Division of Cardiology

Study Record Dates

• First Submitted: November 10, 2017
• First Posted: November 20, 2017
• Study Start: June 1, 2013
• Primary Completion: March 1, 2015
• Study Completion: March 1, 2015
• Last Updated: November 20, 2017

Record last verified: 2017-11

Data Sharing

• IPD Sharing: Will not share

Locations

IT (4)