骨髓单个核细胞移植治疗脑出血

Bone marrow mononuclear cell transplantation for cerebral hemorrhage

BACKGROUND:It has been proved that bone marrow mononuclear cell transplantation can obviously improve neurological function of rats with cerebral hemorrhage. OBJECTIVE:To investigate the effects of transplanted bone marrow mononuclear cells on the neurological function and apoptosis in perihematomal brain tissues following cerebral hemorrhage in a rat model. METHODS:Twenty-four Sprague-Dawley rats were given stereotaxical injection of collagenase IV into the caudate nucleus to establish cerebral hemorrhage models in transplantation group (n=12) and model group (n=12), and then at 6 hours after cerebral hemorrhage, rats in these two groups were administrated 3x10¹⁰/L allograft bone marrow mononuclear cells and the same amount of PBS, respectively. Another 12 rats were given no interventions as control group. Neurological functions of rats were assessed at 1, 4, 8, 16 days after cerebral hemorrhage; pathological changes of the injury sites were observed at 16 days after transplantation; neuronal apoptosis rates in the perihematomal brain tissue were detected by flow cytometry at 2 and 4 days after transplantation. RESULTS AND CONCLUSION:The modified neurologic severity scores in the transplantation group were significantly lower than those in the model group at 8 and 16 days after cerebral hemorrhage (P < 0.05). In the control group, cells in each layer arranged closely with complete structure, and neurons and glial cells were in good shape; in the model group, perihematomal brain tissues were loose with intercellular gap, in which most neurons and glial cells became necrotic; in the transplantation group, cells in each layer arranged closely and regularly, and glial cell proliferation occurred. Besides, compared with the model group, the neuronal apoptosis rate in the transplantation group was significantly lower (P < 0.05). To conclude, bone marrow mononuclear cells can significantly enhance the neurological function recovery and reduce neuronal apoptosis in the brain of cerebral hemorrhage rats.