Pharmacokinetic study of aldoxorubicin in patients with solid tumors

Monica M. Mita, Ronald B. Natale, Edward M. Wolin, Brenda Laabs, Hillary Dinh, Scott Wieland, Daniel J. Levitt, Alain C. Mita

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

Introduction Aldoxorubicin, a prodrug of doxorubicin, binds covalently to serum albumin in the bloodstream and accumulates in tumors. Aldoxorubicin can be administered at doses several-fold higher than doxorubicin can, without associated acute cardiotoxicity. Purpose This study fully evaluated the pharmacokinetic profile of aldoxorubicin (serum and urine). Methods Eighteen patients with advanced solid tumors received aldoxorubicin 230 or 350 mg/m2 (equivalent in drug load to doxorubicin at doses of 170 or 260 mg/m2, respectively) once every 21 days. Blood samples were taken in cycle 1 before aldoxorubicin infusion, and at 5, 15, 30, and 60 min, and at 2, 4, 8, 12, 16, 24, 48, and 72 h after infusion. Urine samples were taken in cycle 1 at 24, 48, and 72 h after infusion. Limited blood sampling was done in cycle 3, before aldoxorubicin infusion, and at 60 min and at 2, 4, and 8 h after infusion. Results The long mean half-life (20.1-21.1 h), narrow mean volume of distribution (3.96-4.08 L/m2), and slow mean clearance rate (0.136-0.152 L/h/m2) suggest that aldoxorubicin is stable in circulation and does not accumulate readily in body compartments outside of the bloodstream. Very little doxorubicin and its major metabolite doxorubicinol, which has been implicated in doxorubicin-associated cardiotoxicity, are excreted in urine. This might explain the lack of cardiotoxicity observed thus far with aldoxorubicin. Conclusions Our findings support dosing and administration schemas used in an ongoing phase 3 clinical study of aldoxorubicin in soft tissue sarcoma, and phase 2 clinical studies in small cell lung cancer, glioblastoma, and Kaposi's sarcoma.

Original languageEnglish (US)
Pages (from-to)341-348
Number of pages8
JournalInvestigational New Drugs
Volume33
Issue number2
DOIs
StatePublished - Apr 1 2015

Keywords

  • Doxorubicin
  • Doxorubicinol
  • Pharmacokinetics
  • Prodrugs
  • Serum albumin

ASJC Scopus subject areas

  • Oncology
  • Pharmacology
  • Pharmacology (medical)

Fingerprint Dive into the research topics of 'Pharmacokinetic study of aldoxorubicin in patients with solid tumors'. Together they form a unique fingerprint.

  • Cite this

    Mita, M. M., Natale, R. B., Wolin, E. M., Laabs, B., Dinh, H., Wieland, S., Levitt, D. J., & Mita, A. C. (2015). Pharmacokinetic study of aldoxorubicin in patients with solid tumors. Investigational New Drugs, 33(2), 341-348. https://doi.org/10.1007/s10637-014-0183-5