Format

Send to

Choose Destination

See 1 citation found using an alternative search:

Am J Kidney Dis. 2015 Jun;65(6):916-24. doi: 10.1053/j.ajkd.2014.11.023. Epub 2015 Jan 24.

Platelet reactivity after receiving clopidogrel compared with ticagrelor in patients with kidney failure treated with hemodialysis: a randomized crossover study.

Author information

1
Division of Nephrology, Department of Internal Medicine, Kyung Hee University Medical Center, Kyung Hee University, Seoul, Republic of Korea. Electronic address: aprilhwan@naver.com.
2
Division of Nephrology, Department of Internal Medicine, Kyung Hee University Medical Center, Kyung Hee University, Seoul, Republic of Korea.
3
Division of Cardiology, Department of Internal Medicine, Kyung Hee University Medical Center, Kyung Hee University, Seoul, Republic of Korea.
4
Division of Cardiology, Department of Internal Medicine, Kyung Hee University Medical Center, Kyung Hee University, Seoul, Republic of Korea. Electronic address: mylovekw@hanmail.net.

Abstract

BACKGROUND:

Patients with kidney failure treated with maintenance hemodialysis (HD) are poor responders to clopidogrel. More beneficial platelet-inhibiting strategies in HD patients therefore are required.

STUDY DESIGN:

Single-center, prospective, randomized, crossover study.

SETTING & PARTICIPANTS:

25 HD patients in Seoul, Korea.

INTERVENTION:

Patients were randomly assigned to receive clopidogrel (300mg loading, 75mg once daily for maintenance dose) or ticagrelor (180mg loading, 90mg twice daily for maintenance dose) for 14 days, and after a 14-day washout period, crossover treatment for another 14 days. All patients received aspirin (100mg/d).

OUTCOMES & MEASUREMENTS:

Platelet function was evaluated predosing and at 1, 5, and 48 hours and 14 days after the first loading dose. During the offset phase, platelet function was assessed at 1 hour and 2, 4, and 14 days after the last dose by light transmittance aggregometry and the VerifyNow P2Y12 assay, and patients were genotyped for the CYP2C19*2 allele. Maximal extent of aggregation, inhibition of platelet aggregation (IPA), P2Y12 reaction units (PRUs), and percentage of inhibition were evaluated. We performed per-protocol analysis, excluding patients who did not complete the protocol.

RESULTS:

9 patients did not complete the protocol (7 patients due to adverse events; 2, nonadherence). Higher IPA occurred with ticagrelor than with clopidogrel at 1, 5, and 48 hours and 14 days after loading. By 5 hours after loading, a greater proportion of patients in the ticagrelor group than in the clopidogrel group achieved IPA>50% (75% vs 12%, respectively; P<0.05) and IPA>70% (44% vs 0%, respectively; P<0.05). Rates (slope) of onset and offset of the antiplatelet effect were faster in patients receiving ticagrelor than for those receiving clopidogrel (P<0.05). Regardless of CYP2C19*2 allele, the ticagrelor group had significantly lower PRUs at all times than the clopidogrel group.

LIMITATIONS:

Single-center study with a small number of patients, not a double-blind study, and not intention-to-treat analysis.

CONCLUSIONS:

Ticagrelor may result in more rapid and greater platelet inhibition than clopidogrel in patients with kidney failure receiving HD.

KEYWORDS:

Platelet inhibition; antiplatelet therapy; clopidogrel; end-stage renal disease (ESRD); hemodialysis (HD); high on-treatment platelet reactivity (HTPR); kidney failure; platelet aggregation assay; platelet reactivity; thrombosis; ticagrelor

PMID:
25622774
DOI:
10.1053/j.ajkd.2014.11.023
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center