Abstract:Objective To analyze the clinical value of using CYP3A5 gene polymorphism to guide tacrolimus administration in post-renal transplantation. Methods A total of 60 patients of renal transplantation during June 2020 to January 2022 were selected as the research objects, were divided into control group and observation group with 30 cases in each group according to different dosing regimens. In the two groups, tacrolimus was administered empirically at dose of 4.0 mg/d on postoperative day 1. In the observation group, the dose of tacrolimus was adjusted according to different CYP3A5 genotypes on postoperative day 3, including 0.12 mg/(kg·d)for AA and AG types and 0.06 mg/(kg·d)for GG type. In the control group, the dose was adjusted according to the results of tacrolimus blood concentration test. The number of patients in the two groups who reached the target concentration of tacrolimus of 3~8 μg/L by the 5th postoperative day, the time and the number of tacrolimus dose adjustments within 2 weeks after surgery were compared. Results The number of patients in the observation group who reached the target concentration of tacrolimus 3~8 μg/L at the 5th postoperative day was higher than that in the control group, and the difference between the two groups was statistically significant (χ2=4.800, P<0.05). The time to reach the target concentration of 3~8 μg/L in the observation group was shorter than that in the control group, and the difference between the two groups was statistically significant(t=8.313, P<0.05). The number of tacrolimus dose adjustments was significantly higher in the control group than in the observation group within 2 weeks after surgery, and the difference between the two groups was statistically significant(χ2=30.240, P<0.05). Conclusion The polymorphism guidance of tacrolimus according to the CYP3A5 genotype after renal transplantation is more beneficial to achieve the serum concentration level as soon as possible after surgery and to improve the prognosis than traditional empirical dosing, which is worth promoting.
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