高压氧治疗脊髓损伤后脊髓组织中增殖细胞核抗原的表达变化

为探讨高压氧(HBO)对脊髓损伤(SCI)大鼠脊髓组织中增殖细胞核抗原(PCNA)表达的影响，笔者观察了HBO治疗后脊髓的组织学改变及PCNA的表达变化。结果显示，损伤后，脊髓组织出血、水肿、空泡变性、神经纤维排列紊乱、断裂；PCNA强阳性表达于神经元细胞中。治疗组中，0．1MPa HBO组的HE及免疫组织化学染色结果与损伤组相似；而0．25MPa HBO组则组织水肿消失，出血、空泡变性减轻，神经细胞形态恢复，结构排列相对完整；PCNA的表达强度较损伤组下降。说明PCNA能明确提示细胞的增殖指数；HBO治疗可阻止或减轻脊髓损伤的病理变化，有效修复脊髓组织的结构和功能。

EXPRESSION CHANGES IN CELLULAR PROLIFERATIVE NUCLEAR ANTIGEN IN SPINAL CORD AFTER HYPERBARIC OXYGEN TREATMENT FOR ITS INJURY IN RAT

To study the effect of hyperbaric oxygen (HBO) on cellular proliferative nuclear antigen (PCNA) in spinal cord after its injury (SCI), we observed the pathological changes and the expression change in PCNA in spinal cord after the injured rats were treated with HBO. The results showed that there were hemorrhage, edema, vacuolation of nerve cells in spinal cord, disorder and fragmentation in nerve fibers after injury. PCNA was strongly positively expressed in neurons. The results in 0.1MPa HBO group were similar to that of non-treatment group, while in 0.25MPa HBO group, edema was abolished, the cellular vacuolation was lessened, the morphology of nerve cells recovered, the structural configuration appeared normal, and the degree of PCNA expression was decreased compared with the injury group. These results suggested that PCNA could serve as a cellular proliferative index; HBO could prevent or alleviate the pathological changes of SCI, and could effectively promote the repair of the injury of the spinal cord.