Abstract
Purpose: The uptake of the boron compound Na2B12H10-SH (BSH) in tumor and normal tissues was investigated in the frame of the EORTC phase I trial ‘Postoperative treatment of glioblastoma with BNCT at the Petten Irradiation Facility’ (protocol 11961).
Methods and Materials: The boron concentration in blood, tumor, normal brain, dura, muscle, skin and bone was detected using inductively coupled plasma-atomic emission spectroscopy in 13 evaluable patients. In a first group of 10 patients 100 mg BSH/kg bodyweight (BW) were administered; a second group of 3 patients received 22.9 mg BSH/kg BW. The toxicity due to BSH was evaluated.
Results: The average boron concentration in the tumor was 19.9±9.1 ppm (1 standard deviation (SD)) in the high dose group and 9.8±3.3 ppm in the low dose group, the tumor/blood ratios were 0.6±0.2 and 0.9±0.2, respectively. The highest boron uptake has been detected in the dura, very low uptake was found in the bone, the cerebro-spinal fluid and especially in the brain (brain/blood ratio 0.2±0.02 and 0.4±0.2). No toxicity was detected except flush-like symptoms in 2 cases during a BSH infusion at a much higher speed than prescribed.
Conclusion: BSH proved to be safe for clinical application at a dose of 100 mg BSH/kg infused and at a dose rate of 1 mg/kg/min. The study underlines the importance of a further investigation of BSH uptake in order to obtain enough data for significant statistical analysis. The boron concentration in blood seems to be a quite reliable parameter to predict the boron concentration in other tissues.
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Hideghéty, K., Sauerwein, W., Wittig, A. et al. Tissue Uptake of BSH in Patients with Glioblastoma in the EORTC 11961 Phase I BNCT Trial. J Neurooncol 62, 145–156 (2003). https://doi.org/10.1023/A:1023201308434
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DOI: https://doi.org/10.1023/A:1023201308434