Transplantation of cryopreserved rat fetal neural cells in suspension and in multicellular aggregates into rats with spinal cord injury

Abstract

Today cell transplantation is one of the promising approaches of spinal cord injuries treatment. The aim of the work was to study the effect of cryopreserved fetal neural cell transplantation in suspensions and cell aggregates for motor activity recovery of rats with experimental spinal cord injury. Materials and methods. Cells were isolated from the brain tissue of rat fetuses 15-16 days of gestation. The formation of aggregates was performed during short-term cultivation at a concentration of 8·106 cells/mL in medium with 10 % adult rat serum. Cell transplantation was performed into the damaged area of spinal cord in aggregates or suspension. To fix transplanted cells in the damaged area we used alginate gel. Results. Transplantation of cryopreserved fetal neural cells in alginate gel had the positive effect on dynamics of rats’ motor activity recovery. That was manifested in the extensive mobility of three joints of one limb and the limited mobility of two joints of the other with simultaneous recovery of the sensitivity of the hind limbs. Conclusion. Cryopreserved fetal neural cells aggregates had a high therapeutic potential on rat traumatic spinal cord injury compared with cell suspension by improving the structure of forming nervous tissue and significantly increasing the rate of hind limb function recovery.