A phase I study of SR-4554 via intravenous administration for noninvasive investigation of tumor hypoxia by magnetic resonance spectroscopy in patients with malignancy

B.M. Seddon, G.S. Payne, L. Simmons, R. Ruddle, R. Grimshaw, S. Tan, A. Turner, F. Raynaud, G.W. Halbert, M.O. Leach, I. Judson, P. Workman

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A Phase I study of SR-4554, a fluorinated 2-nitroimidazole noninvasive probe of tumor hypoxia detected by 19F magnetic resonance spectroscopy (MRS). Eight patients underwent pharmacokinetic studies, receiving doses of SR-4554 of 400-1600 mg/m2. Peak plasma concentrations increased linearly with the SR-4554 dose (r2 = 0.80; P = 0.0002). The plasma elimination half-life was relatively short (mean ± SD, 3.28 ± 0.59 h), and plasma clearance was quite rapid (mean ± SD, 12.8 ± 3.3 liters/h). Urinary recovery was generally high. SR-4554 was well tolerated. A single patient experienced dose-limiting toxicity (nausea and vomiting) at 1600 mg/m2. The maximum tolerated dose was 1400 mg/m2. SR-4554 was detected spectroscopically in tumors immediately after infusion at doses of 400-1600 mg/m2. At the highest dose (1600 mg/m2), SR-4554 was detectable in tumor at 8 h, but not at 27 h.
Original languageEnglish
Pages (from-to)5101-12
Number of pages5089
JournalClinical Cancer Research
Issue number14
Publication statusPublished - 2003


  • cancer research
  • clinical cancer research
  • spectroscopy
  • biomedical sciences

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