Background: Tacrolimus is a widely used immunosuppressant that prevents solid organ transplant rejection. The pharmacokinetics of Tacrolimus show considerable varia - bility. Interleukin-10 (IL-10), in the host's immune response after transplantation, contributes to the variable CYP3Adependent drug disposition of Tacrolimus. In the current study, we aim to evaluate the impact of single nucleotide polymorphisms (SNP) in the promoter region of IL-10 on Tacrolimus dose requirements and the Dose Adjusted Concentration (DAC) of Tacrolimus among kidney transplantation recipients.

Methods: Blood levels of Tacrolimus were measured using Microparticle Enzyme Immunoassay (MEIA) for six months post-transplantation. Genotyping analysis was utilized using specific Polymerase Chain Reaction (PCR) followed by sequencing methods for 98 Jordanian kidney transplant recipients.

Results: Genotyping frequencies of IL-10 (-592) were (CC/CA/AA: 38, 46.7, 15.2%); IL-10 (-819) were (CC/CT/TT: 40.4, 44.1, 15.1%); and IL-10 (-1082) were (AA/AG/GG: 42.6, 44.7, 12.8%). The impact of IL-10 (-1082) on Tacrolimus DAC was gender dependent. Men carrying at least one A allele had significantly lower DAC than men carrying GG genotyping only in the first month post-transplantation 88.2±32.1 vs. 117.5±22.5 ng/mL per mg/kg/day, p=0.04 .

Conclusions: Our current study showed that the interaction between gender and IL-10 -1082 affects Tacrolimus DAC in Jordanian kidney transplant recipients during the first month post-transplantation.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9375538PMC
http://dx.doi.org/10.5937/jomb0-33343DOI Listing

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