Experimental model of acute local
radiation injuries (LRI) was the degree of radiation skin
burns of mouse paws, observed through the 10 day within 1 month after local γ -60Co-irradiation at the doses of 20-45 Gy. For late local
radiation injuries with a maximum of over 6 months after exposure to radiation, model was the
contracture of animal paws and post-radiation
amputation of limbs of the mouse. In the experiments on mice radioprotector
indralin (B-190) IP as direct α1-adrenomimetic has a expressed protective effect on reducing acute and late LRI, equal in terms of
dose reduction factor (DRF) 1.4 -1.5 that was comparable to their efficacy during
radiation injuries of hematopoietic tissues.
Indralin fully retain its radioprotective properties (DRF = 1.5-1.7) in the condition of repeated radioprotector administration through one day at total dose of 57 Gy (three times 19 Gy) of fractionated γ -irradiation. The protective effect of
indralin improved at parenteral administration in the place of local irradiation. The local topical application of
indralin in the
ointments or in
solution of
dimethylsulfoxide has radioprotective effect, equal in the term of DRF to 1.3 -1.5 at acute and late LRI.
Indralin also possessed a expressed radioprotective properties (DRF = 1.5) in decrease
radiation injuries of salivary glands during local irradiation of head of rats.