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Effect of tacrolimus dispositional genetics on acute rejection in the first 2 weeks and estimated glomerular filtration rate in the first 3 months following kidney transplantation.
Pharmacogenetics and Genomics 2018 November 27
BACKGROUND: CYP3A4/5 and P-glycoprotein (P-gp, ABCB1) affect tacrolimus (TAC) exposure in T cells and kidney cells. Genetic variability of these genes has been widely studied for effects on acute rejection and kidney function after transplantation, but findings remain contradictory. In addition, cytochrome P450 reductase (POR) is important for CYP3A4/5 activity, and the pregnane X receptor (NR1I2) regulates CYP3A4/5 and P-gp expression. However, the relationship between POR and NR1I2 genetics and acute rejection and kidney function has not been extensively investigated.
OBJECTIVE: The aim of this study was to investigate the effect of ABCB1 (61A>G, 1199G>A, 1236C>T, 2677G>T, 3435C>T), CYP3A4*22, CYP3A5*3, NR1I2 (8055C>T, 63396C>T) and POR*28 genotypes/haplotypes on acute rejection and kidney function in the first 3 months after transplant.
PARTICIPANTS AND METHODS: The study included 165 kidney transplant recipients, who received TAC, mycophenolate and prednisolone, and 129 donors. TAC dose was adjusted to target trough blood concentrations of 8-15 ng/ml by therapeutic drug monitoring. Recipient and donor genotype/haplotype differences in acute rejection incidence within the first 2 weeks after transplant were assessed by logistic regression, adjusting for induction therapy, human leucocyte antigen mismatches, kidney transplant number, peak panel-reactive antibodies and donor type. Recipient and donor genotype/haplotype differences in estimated glomerular filtration rate in the first 3 months after transplant were assessed by linear mixed effects analysis, adjusting for acute rejection, delayed graft function and donor type.
RESULTS: No genetic factors significantly affected acute rejection or estimated glomerular filtration rate after correction for multiple comparisons (P>0.004).
CONCLUSION: Recipient and donor dispositional genetics had no significant effect on short-term clinical outcomes in kidney transplant patients receiving TAC therapeutic drug monitoring.
OBJECTIVE: The aim of this study was to investigate the effect of ABCB1 (61A>G, 1199G>A, 1236C>T, 2677G>T, 3435C>T), CYP3A4*22, CYP3A5*3, NR1I2 (8055C>T, 63396C>T) and POR*28 genotypes/haplotypes on acute rejection and kidney function in the first 3 months after transplant.
PARTICIPANTS AND METHODS: The study included 165 kidney transplant recipients, who received TAC, mycophenolate and prednisolone, and 129 donors. TAC dose was adjusted to target trough blood concentrations of 8-15 ng/ml by therapeutic drug monitoring. Recipient and donor genotype/haplotype differences in acute rejection incidence within the first 2 weeks after transplant were assessed by logistic regression, adjusting for induction therapy, human leucocyte antigen mismatches, kidney transplant number, peak panel-reactive antibodies and donor type. Recipient and donor genotype/haplotype differences in estimated glomerular filtration rate in the first 3 months after transplant were assessed by linear mixed effects analysis, adjusting for acute rejection, delayed graft function and donor type.
RESULTS: No genetic factors significantly affected acute rejection or estimated glomerular filtration rate after correction for multiple comparisons (P>0.004).
CONCLUSION: Recipient and donor dispositional genetics had no significant effect on short-term clinical outcomes in kidney transplant patients receiving TAC therapeutic drug monitoring.
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