Clinical pharmacokinetics of intravenous treosulfan in patients with advanced solid tumors

Cancer Chemother Pharmacol. 1998;42(2):99-104. doi: 10.1007/s002800050791.


Treosulfan (L-threitol- 1,4-bis-methanesulfonate, Ovastat) is a prodrug of a bifunctional alkylating agent with activity in ovarian carcinoma and other solid tumors. For a clinical and pharmacology study, patients with advanced, refractory, or resistant solid tumors were treated with a single-dose intravenous 30-min infusion of 8 or 10 g/m2 treosulfan. A sensitive method for the determination of treosulfan in plasma and urine by reverse-phase high-performance liquid chromatography was developed. A total of 14 plasma and urine treosulfan pharmacokinetics determinations were analyzed in the 8-g/m2 group and 7 were analyzed in the 10-g/m2 group, the maximum tolerated dose for this group of pretreated patients. The terminal half-life of treosulfan was in the range of 1.8 h. AUC and Cmax values were significantly (P < 0.01) higher in the 10-g/m2 group (AUC 708+/-168 versus 977+/-182 microg ml(-1) h, Cmax 465+/-98 versus 597+/-94 microg/ml). The mean urinary excretion of the parent compound was about 25% of the total dose delivered over 48 h (range 5-49%), and about 20% was excreted during the first 6 h after administration. Currently, a clinical phase I pharmacokinetics and dose-escalation trial with autologous blood stem-cell support has been started at 20 g/m2 treosulfan using a 2-h infusion protocol.

Publication types

  • Clinical Trial
  • Clinical Trial, Phase I
  • Clinical Trial, Phase II
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Antineoplastic Agents, Alkylating / administration & dosage
  • Antineoplastic Agents, Alkylating / pharmacokinetics*
  • Busulfan / administration & dosage
  • Busulfan / analogs & derivatives*
  • Busulfan / pharmacokinetics
  • Female
  • Humans
  • Infusions, Intravenous
  • Male
  • Middle Aged
  • Neoplasms / metabolism*
  • Treatment Outcome


  • Antineoplastic Agents, Alkylating
  • treosulfan
  • Busulfan