Pharmacokinetics of methylprednisolone and rejection episodes in kidney transplant patients.

Abstract:

:Rejection crises after kidney transplantation could be associated with individual variability of pharmacokinetic parameters of steroids. We therefore investigated the individual pharmacokinetics of methylprednisolone on day 2 (60 mg intravenously) and day 4 (60 mg per os) in 40 patients after kidney transplantation. Methylprednisolone was determined in serum by HPLC. Within 6 months, all rejection episodes were recorded and confirmed by kidney transplant biopsy. Values are given as nonparametric medians with the 95% confidence interval (0.95 CI). The 7 patients with a rejection within the first 10 days had a methylprednisolone clearance of 437 ml/min (162-756) that was significantly higher than the 220 ml/min (121-604) in the 22 patients without a rejection episode (P = 0.04). In the complete group of 18 patients having a transplant rejection episode within 6 months, the methylprednisolone elimination half-life after oral dosage was 2.5 hr (1.6-3.9) and significantly shorter than 2.9 hr (1.7-4.0) in 22 patients without rejections (P = 0.03). No differences were seen for body weight, number of mismatches, cold ischemia time, immunosuppressive regimens, and other pharmacokinetic parameters of methylprednisolone (e.g. bioavailability, distribution volume, trough levels). We conclude that pharmacokinetic variability may contribute to the lack of immunosuppressive efficacy in patients with a short halflife of steroids. Therefore, a twice daily dose fraction might be useful for low-dose steroid regimens in kidney transplantation.

journal_name

Transplantation

journal_title

Transplantation

authors

Keller F,Hemmen T,Schöneshöfer M,Schwarz A,Offermann G

doi

10.1097/00007890-199508270-00005

subject

Has Abstract

pub_date

1995-08-27 00:00:00

pages

330-3

issue

4

eissn

0041-1337

issn

1534-6080

journal_volume

60

pub_type

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