Overview of sotrastaurin clinical pharmacokinetics.

Abstract:

:Sotrastaurin (AEB071) is an investigational immunosuppressant that blocks T-lymphocyte activation through protein kinase C inhibition. It is currently in Phase II of clinical development for the prevention of acute rejection after solid organ transplantation. In renal transplant clinical trials, sotrastaurin has been administered at doses of 200 to 300 mg twice daily. Using a validated liquid chromatography method with tandem mass spectrometry, steady-state predose blood concentrations averaged approximately 600 and 900 ng/mL at these dose levels, respectively. Sotrastaurin is primarily metabolized through CYP3A4. There is one active metabolite, N-desmethyl-sotrastaurin, that is present at low blood concentrations (less than 5% of the parent exposure). The elimination half-life of sotrastaurin averages 6 hours. Clinical drug interaction studies to date have demonstrated that sotrastaurin increases the area under the concentration-time curve of everolimus 1.2-fold and of tacrolimus twofold. Conversely, sotrastaurin area under the concentration-time curve is increased up to 1.8-fold by cyclosporine and 4.6-fold by ketoconazole. Blood samples from renal transplant patients receiving sotrastaurin were stimulated ex vivo by protein kinase C-dependent pathways. Inhibition of cytokine production, expression of CD69, and thymidine uptake served as biomarkers that demonstrated the ability of sotrastaurin to inhibit T-cell activation and proliferation at the doses used in these studies. Phase II trials have paired sotrastaurin with tacrolimus, mycophenolic acid, or everolimus. The clinical and pharmacokinetic results of these and upcoming trials will determine the optimal immunosuppressive regimen to benefit from sotrastaurin's novel mechanism of action and whether therapeutic drug monitoring will be beneficial.

journal_name

Ther Drug Monit

authors

Kovarik JM,Slade A

doi

10.1097/FTD.0b013e3181ee9e26

subject

Has Abstract

pub_date

2010-10-01 00:00:00

pages

540-3

issue

5

eissn

0163-4356

issn

1536-3694

journal_volume

32

pub_type

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