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Chinese Journal of Clinical Pharmacology and Therapeutics ›› 2012, Vol. 17 ›› Issue (1): 78-82.

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Relationship between post-transplantation hypertension and dose, plasma concentration of tacrolimus

XI Lan-yan1,2, YUAN Hong1, CHENG Ke3, ZHU Li-jun3, YANG Guo-ping1, ZHANG Gui-xiang1, HUANG Zhi-jun1   

  1. 1Center of Clinical Pharmacology, the Third Xiangya Hospital of Central South University;
    2Department of Pharmacy, Changsha Central Hospital;
    3Organ Transplantation Center, the Third Xiangya Hospital of Central South University, Changsha 410013,Hunan, China
  • Received:2011-09-21 Revised:2012-12-06 Online:2012-01-26 Published:2012-02-16

Abstract: AIM: To investigate the incidence of hypertension after renal transplantation in patients administered with tacrolimus, and the correlation among blood pressure, tacrolimus dosage, plasma concentration and concentration/dose ratio of tacrolimus.METHODS: 200 renal transplant patients treated with tacrolimus were screened in the study, and the blood pressure were measured.Fifty-three hypertensive patients and Fifty-three normotensive patients were randomly enrolled from all screened patients.Tacrolimus was administrated at a stable dose for at least 3 days.Tacrolimus trough level was determined by Microparticle Enzyme Immunoassay (MEIA). The association of blood pressure in tacrolimus dosage and concentration were analyzed. Meanwhile, the dosage, plasmid level and concentration/dose ratio of tacrolimus were compared in the normotensive and hypertensive group.RESULTS: Hypertension was present in 104 post-transplantation patients out of 200 patients (52.0%). Spearman's correlation analysis revealed a positive correlation existed between systolic blood pressure (SBP) and the dose of tacrolimus (r=0.216, P<0.05). However, there was no significant correlation between diastolic blood pressure and tacrolimus trough level.The oral dosage of tacrolimus in hypertension group (3.11±1.49) mg/d was higher than that in normotensive group (2.42±1.07) mg/d (P<0.05). There was no significant difference in tacrolimus trough level between the two groups [HBP vs Nor: (7.76±3.86) ng/mL vs (7.56±2.67) ng/mL, P>0.05]. The concentration/dose ratio of tacrolimus was lower in hypertension group than that in normotensive group [(2.94±1.57) ng·d/mg·mL vs (3.95±3.02) ng·d/mg·mL, P<0.05).CONCLUSION: The present study demonstrated that SBP of renal transplant patients was positively correlated with tacrolimus daily dosage. Administration of tacrolimus with higher dosage may increase the predisposition to hypertension.

Key words: Renal transplantation, Hypertension, Tacrolimus, Dose, Plasma concentration

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