Monitoring of the boron neutron-capture reaction by a simple animal model

Title:

Monitoring of the boron neutron-capture reaction by a simple animal model

Creator:

Mareš, V., Lisá, V., Bačáková, L., and Burian, J.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:0c3afa40-8a4d-43b5-8fcd-7c1e0505f6aa
uuid:0c3afa40-8a4d-43b5-8fcd-7c1e0505f6aa

Subject:

brain tumors, boron-neutron-capture therapy, sodium borocaptate, cell death, radiation damage, and epithermal neutrons

Type:

article, model:article, and TEXT

Description:

Sodium borocaptate (BSH, Na2Bi2HnSH), a slow neutron-capture compound, was injected into the left forebrain ventricle of 1-week-old rats (150 fig BSH/3 p\ phosphate buffered saline). After 90 min, the animals were irradiated by epithermal neutrons (LVR-15 nuclear reactor in Řež near Prague, flux density 8.8 x 107 neutrons cm-2 s'1, 8 MW reactor power, 8.2 cGy/min) for 5,10 or 20 min. The brains were examined histologically 8 h after irradiation. In animals irradiated for 5 to 10 min (41 and 82 cGy-Eq, respectively) lethal damage of cells was found in the external granular layer of the cerebellum and the subependymal layer of the forebrain. Irradiation for 20 min (164 cGy-Eq) caused more extensive destruction of cell populations in these regions and, in addition, dead cells appeared also in the more differentiated postmitotic compartments, namely the deeper layers of the cerebellum, layers II/III of the cerebral cortex and corpus callosum. In the forebrain periventricular layer, the extent of cell damage was declining towards the olfactory bulbs. In intact animals, as well as in those injected only with the 150 p\ phosphate buffered saline, the radiation damage was low and limited only to the most sensitive dividing populations of the cerebellum and the forebrain. The study demonstrates a differentiation-dependent damage of the rat brain cells by alpha particles and presents a simple model for evaluation of the biological effectiveness of slow neutron beams constructed for neutron-capture therapy of tumors.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 1997 Volume:46 | Number:2

Harvested from:

CDK

Metadata only:

false