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Research Article

Borocaptate sodium: a potential boron delivery compound for boron neutron capture therapy evaluated in dogs with spontaneous intracranial tumors

S L Kraft, P R Gavin, C E DeHaan, C W Leathers, W F Bauer, D L Miller, and R V Dorn 3rd
PNAS December 15, 1992 89 (24) 11973-11977; https://doi.org/10.1073/pnas.89.24.11973
S L Kraft
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P R Gavin
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C E DeHaan
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C W Leathers
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W F Bauer
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D L Miller
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R V Dorn 3rd
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Abstract

Borocaptate sodium (Na2B12H11SH) is a boron-carrying compound under consideration for use in boron neutron capture therapy. The biodistribution of boron from borocaptate sodium administration will partly determine boron neutron capture therapy efficacy and normal tissue radiation tolerance. The biodistribution of boron was determined in 30 dogs with spontaneous intracranial tumors at 2, 6, or 12 hr after intravenous borocaptate sodium infusion. Blood and tissue boron concentrations were measured using inductively coupled plasma atomic emission spectroscopy. Mean tumor boron concentration (mean +/- standard error) was 35.9 +/- 4.6 (n = 15), 22.5 +/- 6.0 (n = 9), and 7.0 +/- 1.1 micrograms of boron per g (n = 6) at 2, 6, and 12 hr, respectively, after borocaptate sodium infusion. Peritumor boron concentrations were elevated above that of normal brain in half of the dogs. Normal brain boron concentration (mean +/- standard error) was 4.0 +/- 0.5, 2.0 +/- 0.4, and 2.0 +/- 0.3 micrograms of boron per g at 2, 6, and 12 hr after infusion, respectively. Some cranial and systemic tissues, and blood, had high boron concentration relative to tumor tissue. Geometric dose sparing should partly offset these relatively high normal tissue and blood concentrations. Borocaptate sodium biodistribution is favorable because tumor boron concentrations of recommended magnitude for boron neutron capture therapy were obtained and there was a high tumor-to-normal brain boron concentration ratio.

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Borocaptate sodium: a potential boron delivery compound for boron neutron capture therapy evaluated in dogs with spontaneous intracranial tumors
S L Kraft, P R Gavin, C E DeHaan, C W Leathers, W F Bauer, D L Miller, R V Dorn
Proceedings of the National Academy of Sciences Dec 1992, 89 (24) 11973-11977; DOI: 10.1073/pnas.89.24.11973

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Borocaptate sodium: a potential boron delivery compound for boron neutron capture therapy evaluated in dogs with spontaneous intracranial tumors
S L Kraft, P R Gavin, C E DeHaan, C W Leathers, W F Bauer, D L Miller, R V Dorn
Proceedings of the National Academy of Sciences Dec 1992, 89 (24) 11973-11977; DOI: 10.1073/pnas.89.24.11973
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