Cancer Chemotherapy and Pharmacology

, Volume 66, Issue 1, pp 151–158

A dose-finding and pharmacodynamic study of bortezomib in combination with weekly paclitaxel in patients with advanced solid tumors


    • The Ohio State University
  • Tanios Bekaii-Saab
    • The Ohio State University
  • Larry J. Schaaf
    • The Ohio State University
  • Gregory B. Lesinski
    • The Ohio State University
  • David M. Lucas
    • The Ohio State University
  • Donn C. Young
    • The Ohio State University
  • Amy S. Ruppert
    • The Ohio State University
  • John C. Byrd
    • The Ohio State University
  • Kristy Culler
    • The Ohio State University
  • Diedre Wilkins
    • The Ohio State University
  • John J. Wright
    • The Ohio State University
  • Michael R. Grever
    • The Ohio State University
  • Charles L. Shapiro
    • The Ohio State University
Original Article

DOI: 10.1007/s00280-009-1145-z

Cite this article as:
Ramaswamy, B., Bekaii-Saab, T., Schaaf, L.J. et al. Cancer Chemother Pharmacol (2010) 66: 151. doi:10.1007/s00280-009-1145-z



A phase I study to determine the maximum tolerated dose (MTD) of bortezomib (B) when combined with weekly paclitaxel in patients with advanced solid tumors.

Patients and methods

Eligible patients received escalating doses of intravenous (IV) bortezomib (0.6–2 mg/m2) on days 2 and 9 and IV paclitaxel at 100 mg/m2 on days 1 and 8 of a 21-day cycle. Dose escalation was based on two end-points: not exceeding 80% 20S-proteasome inhibition (20-S PI) and the development of dose-limiting toxicity defined as grade 3 or greater non-hematologic or grade 4 hematologic toxicities.


Forty-five patients with advanced solid tumors and a median of 3 prior chemotherapy regimens (range 0–9), received 318 doses (median 5, range 1–34) of bortezomib and paclitaxel. Dose-related inhibition of 20-S PI was observed with a maximum inhibition of 70–80% at the MTD of 1.8 mg/m2 of bortezomib. At the MTD (N = 9) the following toxicities were observed: grade 4 neutropenia without fever (n = 2) and cerebrovascular ischemia (n = 1); grade 3 neutropenia (n = 3), diarrhea (n = 2), nausea (n = 1), and fatigue (n = 1); grade 2 fatigue (n = 5), diarrhea (n = 4), and dyspnea (n = 2). There was one partial response in a patient with an eccrine porocarcinoma. Stabilization of disease was observed in 7 (16%) patients, 3 of whom had advanced pancreatic cancer.


Sequential paclitaxel and bortezomib in previously treated patients with advanced solid tumors resulted in acceptable toxicity and no evidence of interaction. The recommended phase II dose of bortezomib in combination with weekly paclitaxel was 1.8 mg/m2.


BortezomibPhase ISolid tumorsPaclitaxel

Copyright information

© Springer-Verlag 2009