METHOD FOR REPAIRING LONG BONE DEFECTS OF CRITICAL SIZE Russian patent published in 2015 - IPC A61K35/28 A61P19/00 C12N5/775 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine, namely to orthopaedics, and can be used for producing a transplant for long bone tissue repair. That is ensured by collecting bone marrow aspirate into lithium heparin test tubes, diluting with phosphate salt buffer, filtered through a filter with pore size 70 mcm and centrifuging for 10 min at 400 g. That is followed by inoculating flasks 150 cm² with the produced mesenchymal stem cells (MSCs) at 1×10⁶ cells/cm², culturing at temperature 37°C and 5% CO₂ in air, in the Dulbecco's Modified Eagle's medium containing glucose 1 g/l and less, with 10% embryo calve serum. The medium is changed every 3 days. Before preparing the transplant, the cells are removed from the substrate with 0.05% trypsin EDTA, washed and re-suspended. The cell suspension is applied on the matrix, incubated for 3 hours at temperature 37°C with rocking in a rotation shaker at 25 rpm. The matrix is filled with the DMEM medium with 10% bovine foetal serum, dexamethasone 10^-7 M, β-glycerophosphate 10 mM, ascorbate-2-phosphate 0.05 mM, 1% streptomycin 100 mcg/ml or penicillin 100 units/ml. The MSCs are cultured for 28 days. What is also presented is a method for long bone tissue repair.

EFFECT: group of inventions provides the uniform bone tissue repair in replacing the bone tissue defect of critical size with the transplant.

3 cl, 2 tbl, 6 ex