BACKGROUND Drug interactions are an important risk in transplant patients. Case presentation: This case describes an incident where a patient with islet transplantation, who was using tacrolimus as part of the immunosuppressant regime, was started on a course of clarithromycin and experienced nephrotoxicity and neurotoxicity. He was an outpatient at that time and was managed with temporary cess...

Tacrolimus has been used successfully to prevent acute rejection of renal transplantation. It inhibits calcineurin, a Ca2+ calmodulindependent phosphatase, which results in reduced expression of interleukin-2 by T lymphocytes [17]. Tacrolimus has been associated with many side effects including nephrotoxicity, neurotoxicity and the induction of a diabetic state. Unlike cyclosporine A, studies t...

INTRODUCTION Tacrolimus is a calcineurin inhibitor used as an immunosuppressant drug in solid organ transplantation, and is mainly metabolized by cytochrome P450 (CYP) 3A4 and CYP3A5. Studies have shown an association between the CYP3A5 genotype and tacrolimus dose-adjusted trough concentrations. Variants in the genes PPARA, POR and CYP3A4 have recently been shown to influence tacrolimus metabo...

Objective: The purpose of this retrospective study is to review our experience with tacrolimus as a rescue immunosuppressant for heart transplant recipients with refractory rejection or cyclosporine intolerance. Methods: From June 1995 to November 1998, 15 cardiac transplant recipients were converted from our standard cyclosporine-based immunosuppressive regimen to a tacrolimus-based treatment....

Tacrolimus is an immunosuppressive drug, used to prevent organ transplant rejection. Immunosuppresants are known to unfavorably affect the osseous system. However, in our previous study on bone histomorphometric parameters we observed that low-dose tacrolimus intensified bone formation. The aim of the present study was to investigate the effects of low-dose tacrolimus on bone mechanical propert...

We determined the through blood and plasma concentrations of tacrolimus from the day of transplantation through 30 days posttransplantation in four liver and four kidney transplant patients by three different methods. The first method involved a solid phase extraction of the blood or plasma using Sep-Pak columns (SPs) followed by quantitation of tacrolimus using an enzyme-linked immunosorbent a...

SIGNIFICANT improvements in the results of renal transplantation in the 1980s were largely due to the development of cyclosporine (CyA) and the use of antilymphocyte agents for induction protocols and/or treatment of rejection. However, rejection refractory to treatment with corticosteroids and/or antilymphocyte agents has remained a major obstacle to long-term success and account for a signifi...

Tacrolimus (FK506) is one of the principal immunosuppressive agents used after solid organ transplantations to prevent allograft rejection. Chronic renal injury induced by tacrolimus is characterized by linear fibrosis in the medullary rays; however, the early morphologic findings of acute tacrolimus nephrotoxicity are not well characterized. Kidney injury molecule-1 (KIM-1) is a specific injur...

Despite the therapeutic equivalence between twice-daily and once-daily tacrolimus, patient safety after conversion is still a concern. We reviewed 218 liver transplantation (LT) patients who converted twice-daily to once-daily tacrolimus between May 2011 and January 2014. Thirty (13.8%) patients had adverse events after conversion, with a liver function test (LFT) abnormality being the most com...

Both brain injury and tacrolimus have been reported to promote the regeneration of injured peripheral nerves. In this study, before transection of rat sciatic nerve, moderate brain contusion was (or was not) induced. After sciatic nerve injury, tacrolimus, an immunosuppressant, was (or was not) intraperitoneally administered. At 4, 8 and 12 weeks after surgery, Masson's trichrome, hematoxylin-e...