Introduction
As was shown, the targets for therapeutic intervention in treatment of AIS are growth plates (GP) of the vertebral bodies, which are intensively proliferating cells. An encouraging method to control GP activity is a photodynamic impact (PDI). It is based on the arising of singlet oxygen and active radicals under the influence of laser irradiation on proliferating cells, that have accumulated photosensitizer (PS), and ultimately leads to their necrosis and apoptosis. In our previous histological studies it was found that PS actively accumulates in GP cells of long tubular bones and PDI on them causes their decreasing and reducing of the chondrocytes total number in them. This suggests a similar effect of PDI on vertebral bodies GP, since they are histologically identical to former ones.