ATC Abstracts

American Transplant Congress abstracts

  • Home
  • Meetings Archive
    • 2022 American Transplant Congress
    • 2021 American Transplant Congress
    • 2020 American Transplant Congress
    • 2019 American Transplant Congress
    • 2018 American Transplant Congress
    • 2017 American Transplant Congress
    • 2016 American Transplant Congress
    • 2015 American Transplant Congress
    • 2013 American Transplant Congress
  • Keyword Index
  • Resources
    • 2021 Resources
    • 2016 Resources
      • 2016 Welcome Letter
      • ATC 2016 Program Planning Committees
      • ASTS Council 2015-2016
      • AST Board of Directors 2015-2016
    • 2015 Resources
      • 2015 Welcome Letter
      • ATC 2015 Program Planning Committees
      • ASTS Council 2014-2015
      • AST Board of Directors 2014-2015
      • 2015 Conference Schedule
  • Search

Impact of Liver Recipient Genotype on Tacrolimus

S. Tremblay1, T. Fukuda2, T. Mizuno2, A. A. Vinks2, E. Woodle1, J. Klawitter3, J. Klawitter3, U. Christians3, R. R. Alloway1

1University of Cincinnati, Cincinnati, OH, 2Cincinnati Children's Hospital and Medical Center, Cincinnati, OH, 3iC42 Clinical Research and Development, Aurora, CO

Meeting: 2019 American Transplant Congress

Abstract number: 394

Keywords: Genomics, Immunosuppression, Liver, Pharmacokinetics

Session Information

Session Name: Concurrent Session: Non-Organ Specific: Pharmacogenomics / Pharmacokinetics

Session Type: Concurrent Session

Date: Monday, June 3, 2019

Session Time: 4:30pm-6:00pm

 Presentation Time: 4:42pm-4:54pm

Location: Room 210

*Purpose: In kidney transplant recipients, recipient genotype (CYP3A5 *3) has the greatest influence on tacrolimus pharmacokinetics (PK). However, in liver transplant recipient, donor liver and recipient gut genotypes may differ. The purpose of this study was to evaluate the impact of donor and recipient genotype in adult, deceased donor North American stable liver transplant recipients more than 6 months from transplant.

*Methods: 12-hour PK profiles (2/patient) were obtained from stable liver transplants (U01 FD004573, PI. Alloway). Recipients were genotyped for CYP3A5 *3 (rs776746), ABCB1 3435C>T (rs1045642) and POR*28 (rs1057868). CL/F, AUC/dose, dose, Ctrough and C­trough/dose were previously derived using Winnonlin. Kruskall-Wallis tests were performed between genotypes, random forests trees and recursive feature selection were used to select variables in the final mixed effects model and known factors, including age, sex, race, height, weight, BMI, hematocrit, MMF, steroids, diabetes were included. Final mixed effects model selection was done using the Akaike Information Criterion.

*Results: 24 donors had available genetic material. Recipient ABCB1 T resulted in significantly higher CL/F and dose, lower AUC/dose and Ctrough/dose. Donor CYP3A5*3 was associated with lower CL/F, higher AUC/dose and Ctrough/dose but not with dose (Figure 1).

 border=

Final mixed effects models revealed that recipient ABCB1, age, donor CYP3A5, diabetes were associated with CL/F, dose, AUC/dose, and Ctrough/dose. Age, diabetes, hematocrit, and BSA (post-hoc) were associated with some of the parameters (Table 1).

 border=

Race, MMF, steroids were not associated with changes in PK parameters. Models were able to explain up to 75% of the variance in the data.

*Conclusions: In stable liver transplant recipients more than 6 months from transplant, recipient ABCB1 (gut) and donor CYP3A5 (liver) were significantly associated with changes in PK parameters, whereas race was not. Interactions between recipient (gut) and donor (liver) genotypes explain significant variability in stable liver transplant recipients.

  • Tweet
  • Click to email a link to a friend (Opens in new window) Email
  • Click to print (Opens in new window) Print

To cite this abstract in AMA style:

Tremblay S, Fukuda T, Mizuno T, Vinks AA, Woodle E, Klawitter J, Klawitter J, Christians U, Alloway RR. Impact of Liver Recipient Genotype on Tacrolimus [abstract]. Am J Transplant. 2019; 19 (suppl 3). https://atcmeetingabstracts.com/abstract/impact-of-liver-recipient-genotype-on-tacrolimus/. Accessed May 31, 2025.

« Back to 2019 American Transplant Congress

Visit Our Partner Sites

American Transplant Congress (ATC)

Visit the official site for the American Transplant Congress »

American Journal of Transplantation

The official publication for the American Society of Transplantation (AST) and the American Society of Transplant Surgeons (ASTS) »

American Society of Transplantation (AST)

An organization of more than 3000 professionals dedicated to advancing the field of transplantation. »

American Society of Transplant Surgeons (ASTS)

The society represents approximately 1,800 professionals dedicated to excellence in transplantation surgery. »

Copyright © 2013-2025 by American Society of Transplantation and the American Society of Transplant Surgeons. All rights reserved.

Privacy Policy | Terms of Use | Cookie Preferences