Tacrolimus and Mycophenolic Acid Blood Concentration and Cellular Rejection After Heart Transplantation in First Endomyocardial Biopsy.

Abstract:

BACKGROUND:Tacrolimus and mycophenolic acid (MPA) are the most important immunosuppressive drugs in modern heart transplantation. The pharmacokinetics of tacrolimus are best described by a 2-compartment model. MPA has very variable pharmacokinetics. The aim of this research was to compare kinetics of the immunosuppressants' blood levels in a group of patients with and without graft rejection. MATERIALS AND METHODS:The study was a retrospective analysis of 39 consecutive adult orthotopic heart transplantations (OHT): 10 (9 men and 1 woman) in group R had graft rejection (ISHLT >2) in the first biopsy and 29 (22 men and 7 women) in group C were without rejection. Ischemic cardiomyopathy occurred in 2 of 7 and nonischemic cardiomyopathy in 8 of 22 (group R and group C, respectively). RESULTS:Patients did not differ between groups except diabetes, which occurred more often in group R. Immunosuppressive drug levels were: group R and group C, respectively, 2.13 ± 0.49 and 2.11 ± 0.72 μg/mL; P = .93 for mycophenolate mofetil (MMF) and 9.42 ± 1.76 and 9.63 ± 2.30 ng/mL; P = .75 for tacrolimus. ICU stay was 14 ± 11 vs 15 ± 15 days; P = .76. There were 2 of 6 primary graft failures, 1 of 1 neurologic complications, and 0 of 6 reoperations (P < .05) in group R and group C, respectively. One patient died from group C in 30 days. During the hospital stay the incidence of graft rejection was diagnosed in 20 patients (16men and 4 women) (ISHLT >2 in endomyocardial biopsy) in the study population. CONCLUSIONS:Monitoring of tacrolimus concentration in the early post--heart transplant period does not identify patients with rejection in the authors' study. Monitoring concentration of MMF does not identify patients with rejection. Further investigation is needed to evaluate factors responsible for post--heart transplant rejection in the early phase.

journal_name

Transplant Proc

authors

Nadziakiewicz P,Grochla M,Krauchuk A,Szyguła-Jurkiewicz B,Lorek J,Barańska A,Zembala MO,Przybyłowski P

doi

10.1016/j.transproceed.2020.03.006

subject

Has Abstract

pub_date

2020-09-01 00:00:00

pages

2094-2097

issue

7

eissn

0041-1345

issn

1873-2623

pii

S0041-1345(20)30118-4

journal_volume

52

pub_type

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