Tacrolimus effects and side effects after liver transplantation: is there a difference between immediate and extended release?

Effectiveness and safety of once-daily tacrolimus formulations in de novo liver transplant recipients: The PRETHI study

Data comparing long-term effectiveness and safety of once-daily tacrolimus formulations in de novo liver transplantation are scarce. We compared the effectiveness, pharmacokinetic profile, and safety of LCPT (Envarsus) and PR-Tac (Advagraf) for up to 12 months post-transplant. Adult de novo liver transplant recipients who started IR-Tac (Prograf) and were converted to LCPT or PR-Tac 3-5 days post-transplant were included. Data from 163 patients were analyzed, 87 treated with LCPT and 76 with PR-Tac. The incidence of treatment failure was 30.5% in the LCPT group versus 23.0% in the PR-Tac group (p = .291). Biopsy-proven acute rejection (BPAR) was reported in 26.8% of patients in the LCPT group and 17.6% in the PR-Tac group (p = .166). Graft loss was experienced in one patient (1.2%) in the LCPT group and three patients (4.1%) in the PR-Tac group (p = .346). Death was registered in three patients (3.7%) in the LCPT group and three patients (4.1%) in the PR-Tac group (p > .999). Patients in the LCPT group showed 45.7% higher relative bioavailability (Cmin /total daily dose [TDD]; p < .01) with similar Cmin and 33.3% lower TDD versus PR-Tac (p < .01). The evolution of renal function, safety profile, and the incidence of post-transplant renal failure, dyslipidemia, obesity, hypertension, and diabetes mellitus were similar in patients treated with LCPT and PR-Tac. In de novo liver transplant patients, LCPT and PR-Tac showed comparable effectiveness with higher relative bioavailability, similar Cmin and lower TDD in the LCPT group. Renal function, safety, and post-transplant complications were comparable in LCPT and PR-Tac groups.

Symptom Experience and Related Predictors in Liver Transplantation Recipients

PURPOSE

Symptom experience after liver transplantation (LT) provides healthcare professionals with important information about the benefits and limitations of LT from patients' perspective. This study aims to explore the multidimensional symptom experience and analyze related predictive factors in LT recipients.

METHODS

This cross-sectional study evaluated the occurrence, frequency, intensity, and level of distress of 40 symptoms in 265 LT recipients. Stepwise multiple regression analysis was performed to analyze the influencing factors of symptom experience.

RESULTS

The analysis of patient-reported data indicated that the ten most common symptoms were fatigue (42.3%), frequent sleep interruptions (38.9%), difficulty falling asleep (35.9%), decreased memory (34.0%), dreaminess (29.8%), itch (28.7%), muscular weakness (26.4%), shortness of breath (25.3%), anxiety (24.5%), and hand tremor (21.9%). Patients were classified into four groups according to survival time (1-month, 2-6-month, 7-12-month, and >1-year groups) after LT, and the most common symptom was fatigue in the one-month and 2-6-month groups, difficulty falling asleep in the 7-12-month group, and decreased memory in the >1-year group. Type of the primary caregiver, complications, concerns about the decreased ability to perform household and outdoor activities, and concerns about being a burden to the family were predictors of symptoms burden.

CONCLUSION

LT recipients experienced complicated symptoms. In clinical practice, it is critical to integrate physicians, nurses, and social workers as a medical team to help LT recipients develop suitable coping strategies that can potentially address patients' concerns, increase the sense of confidence, and improve symptom outcomes.

Conversion From Immediate-Release Tacrolimus to Prolonged-Release Tacrolimus in Stable Heart Transplant Patients: A Retrospective Study

BACKGROUND

Lifelong adherence with post-transplant immunosuppression is challenging, with nonadherence associated with greater acute rejection (AR) risk.

METHODS

This retrospective study evaluated conversion from immediate-release tacrolimus (IRT) to prolonged-release tacrolimus (PRT), between January 2008 and December 2012 in stable adult heart transplant recipients. Cumulative incidence rate (IR) of AR and infection pre- and postconversion, safety, tacrolimus dose and trough levels, concomitant immunosuppression, and PRT discontinuation were analyzed (intention-to-treat population).

RESULTS

Overall, 467 patients (mean age, 59.3 [SD, 13.3] years) converted to PRT at 5.1 (SD, 4.9) years post transplant and were followed for 3.4 (SD, 1.5) years. During the 6 months post conversion, 5 patients (1.1%; 95% CI, 0.35%-2.48%) had an AR episode and IR was 2.2/100 patient-years (95% CI, 0.91-5.26). Incidence of rejection preconversion varied by time from transplant to conversion. Infection IR was similar post- and preconversion (9.2/100 patient-years [95% CI, 7.4-11.3] vs 10.6/100 patient-years [95% CI, 8.8-12.3], respectively; P = .20). Safety variables remained similar post conversion. The IR of mortality/graft loss was 2.3/100 patient-years (95% CI, 1.7-3.1).

CONCLUSIONS

Conversion from IRT to PRT in heart transplant recipients in Spain was associated with no new safety concerns and appropriate immunosuppressive effectiveness.

Efficacy and Safety of de Novo and Early Use of Extended-release Tacrolimus in Heart Transplantation

INTRODUCTION AND OBJECTIVES

The extended-release formulation of tacrolimus (ERT) allows once-daily dosage, thus simplifying the immunosuppressive regimen. This study aimed to describe the safety and efficacy of the de novo and early use of ERT in heart transplantation.

METHODS

This was an observational, retrospective, multicenter study comparing the safety and efficacy of the de novo use of ERT (ERT group [n=94]), standard-release tacrolimus (SRT group [n=42]) and early conversion (EC) from SRT to ERT (EC group [n=44]). Extended-release tacrolimus was used between 2007 and 2012. One-year incidence rates of acute rejection, infection, and cytomegalovirus infection were analyzed. Safety parameters were also evaluated.

RESULTS

There were no significant between-group differences in the daily dose or trough levels of tacrolimus during the first year after transplantation. The rejection incidence rates were 1.05 (95%CI, 0.51-1.54), 1.39 (95%CI, 1.00-1.78), and 1.11 (95%CI, 0.58-1.65) episodes per patient-years in the SRT group, ERT group, and EC group, respectively (P=.48). The infection incidence rates were 0.75 (95%CI, 0.60-0.86), 0.62 (95%CI, 0.52-0.71), and 0.55 (95%CI, 0.40-0.68) in the SRT group, ERT group, and EC group, respectively (P=.46). Cytomegalovirus infection occurred in 23.8%, 20.2%, and 18.2% of the patients, respectively (P=.86). No significant between-group differences were found in laboratory tests or in allograft function. There was 1 death in the SRT group and 2 in the ERT group.

CONCLUSIONS

Both de novo and early use of ERT seem to have similar safety and efficacy profiles to conventional SRT-based immunosuppression.

Update on the clinical utility of once-daily tacrolimus in the management of transplantation

Adherence to immunosuppression and minimizing variability in drug exposure are important considerations in preventing rejection and maximizing overall transplant outcomes. The availability of once-daily tacrolimus may confer potential benefit by simplifying immunosuppressive regimens, thereby improving medication adherence among transplant recipients. Pharmacokinetic studies in healthy normal volunteers and stable transplant recipients suggest that once-daily tacrolimus is bioequivalent to twice-daily tacrolimus. Efficacy studies suggest that once-daily tacrolimus is noninferior to twice-daily tacrolimus with a concentration-dependent rejection risk. The incidence of biopsy-proven acute rejection, graft survival, and patient survival are more or less comparable between the two tacrolimus formulations. Once-daily tacrolimus has also been reported to have favorable effects on blood pressure, lipid profile, and glucose tolerance. Once-daily tacrolimus may be a viable option to consider for de novo immunosuppression or for conversion from conventional tacrolimus.