Journal List > J Korean Soc Transplant > v.30(2) > 1034508

Kim, Ahn, Kim, Kim, and Kang: Single Center Experiences of Conversion from Twice-daily Tacrolimus (Prograf) to Once-daily Tacrolimus (Advagraf) in Stable Liver Transplant Recipients

Abstract

Background:

Patient adherence to immunosuppressant regimens after organ transplant is crucial to preserve graft function, and simplifying the regimen improves adherence. In this study, our experience of conversion from twice-daily (b.i.d.) to once-daily (q.d.) tacrolimus (TAC) in stable liver transplant recipients is reviewed and the proper conversion regimen is investigated.

Methods:

Between November 2011 and August 2012, the regimen was converted in 32 stable liver transplant recipients, and data on the conversions gathered retrospectively from medical records. TAC trough level, dose, and laboratory findings were evaluated at preconversion and 1 to 12 months after conversion.

Results:

Conversion from b.i.d. to q.d. regimen was based on 1:1 proportion in 16 patients and dose escalation in 16 patients. The mean conversion time after transplant was 56.8 months (range; 21∼94). Reconversion to b.i.d. regimen was needed in nine patients. Among these patients, seven patients needed titration due to elevated liver enzyme. The trough level decreased significantly after conversion (from 4.7 to 3.1 ng/mL) in patients with conversion at 1:1 proportion, while increasing slightly without statistical significance (3.7 to 4.0 ng/mL) in patients with dose escalation. At 1 year after conversion, dose adjustment was required to preserve trough level and graft function in 14 patients.

Conclusions:

Based on our results, TAC q.d. formulation can be a useful option to improve adherence in stable liver transplant recipients. However, dose titration should be considered for preserving proper trough level in case of low TAC level or TAC single regimen.

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Fig. 1.
Trough level change at 1 month after conversion (n=32).
jkstn-30-77f1.tif
Table 1.
Patients characteristics at the time of conversion (n=32)
Characteristic Value
Sex (males/female) 24/8
Age at conversion (yr) 55±9.9 (18∼72)
Time from LT to conversion 56.8±19.49 (21∼94)
Immunosuppressant regimen
  TAC single 30
  TAC+MMF 2
History of rejection episode 5 (16)
Indications for LT
  Hepatitis B virus 18 (56)
  Hepatocellular carcinoma 10 (31)
  Others 4 (13)
Mean TAC dose (mg/day) 2.03±0.60 (1∼4)
Baseline mean trough level (ng/mL) 4.2±1.50 (1.9∼7.4)
Reconversion to TAC twice-daily 9 (28)
Time from conversion to reconversion 4.4±4.12 (0.9∼11.4)
Cause of reconversion
  Elevated AST or ALT (1:1/escalation) 7 (5/2)
  Uncontrolled trough level 1
  Neurologic symptoma 1

Data are presented as mean±SD (range) or number (%).

Abbreviations: LT, liver transplant; MMF, mycophenolate mofetil; TAC, tacrolimus; AST, aspartate aminotransferase; ALT, alanine aminotransferase.

a Perioral numbness.

Table 2.
Liver function, kidney function, serum trough level, and dose of TAC in patients with successful conversion at baseline and after the conversion from TAC twice-daily to TAC once-daily (n=23)
Variable Time (mo) P-value
Baseline 1 3 6 12
ALP (U/L) 254±124 246±115 228±114 232±99 235±105 0.001
AST (U/L) 22±6 21±5 22±6 22±5 23±6 0.727
ALT (U/L) 21±12 20±10 21±9 22±10 23±10 0.819
Total bilirubin (mg/dL) 0.9±0.3 0.9±0.4 1.0±0.4 1.0±0.5 0.9±0.4 0.640
Serum Cr (mg/dL) 0.9±0.3 0.9±0.2 1.0±0.2 1.0±0.2 0.9±0.2 0.178
eGFR (mL/min) 94±28 93±26 87±24 88±25 91±27 0.095
TAC level (ng/mL) 3.9±1.4 3.2±1.5 3.4±1.5 3.6±1.1 3.8±1.6 0.254
TAC dose (mg) 2.1±0.6 2.4±0.8 2.5±0.8 2.5±0.8 2.6±0.8 0.001

Data are presented as mean±SD.

Abbreviations: TAC, tacrolimus; ALP, alkaline phosphatase; AST, aspartate aminotransferase; ALT, alanine aminotransferase; eGFR, estimated glomerular filtration rate.

Table 3.
Comparison of characteristics and results between 1:1 dose group and escalation group
Characteristic 1:1 Group Escalation group P-value
Sex (male/female) 12/4 12/4  
Age at conversion (yr) 54±11.6 56±8.1 0.577
Time from LT to conversion (mo) 56.5±23.4 57.2±15.3 0.926
History of rejection 3 (19) 2 (13) 0.632
Mean TAC dose (mg/day) 2.0±0.5 2.1±0.7 0.772
Mean conversion dose (mg/day) 2.0±0.5 2.7±0.8 0.013
Baseline mean trough level (ng/mL) 4.7±1.5 3.7±1.4 0.056
Mean trough level after conversion (ng/mL) 3.1±1.3 4.0±1.8 0.110
Reconversion to TAC twice-daily 5 (31) 4 (25) 0.699
Reconversion due to elevated AST or ALT 5 (31) 2 (13) 0.207

Data are presented as mean±SD or number (%). Abbreviations: LT, liver transplant; TAC, tacrolimus; AST, aspartate aminotransferase; ALT, alanine aminotransferase.

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