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The aim of the present study was to evaluate the dynamic protein expression of nuclear factor (NF)-κB and apoptosis in the cerebral tissue surrounding hematoma following intracerebral hemorrhage (ICH) in rats. A total of 80 healthy male Wistar rats were divided into a sham-surgery group and an ICH group. The ICH model was established by injecting autogenous non-heparin anticoagulant arterial blood into the caudate putamen. NF-κB levels were assessed by immunohistochemistry at different time points subsequent to surgery, and apoptosis condition was investigated by terminal deoxynucleotidyl-transferase-mediated dUTP nick end labeling. Different levels of NF-κB were expressed in the cerebral tissue around the ICH at each time point in the ICH group. NF-κB protein expression was detected at 3 h following hemorrhage, mainly in the cytoplasm. Following 6 h, NF-κB was identified in the nucleus. Its expression peaked at 72 h following hemorrhage, and persisted for 5 days. Apoptosis was observed 6 h following hemorrhage, and had increased significantly by 12 h. The rate of apoptosis continued to rise from 72-120 h following hemorrhage. Correlation analysis revealed a significant positive correlation between NF-κB expression and apoptosis (r=0.753; P&lt;0.01). The enhancement of NF-κB expression and apoptosis around ICH, and the significant positive correlation between NF-κB expression and apoptosis, indicates that NF-κB activation may enhance cerebral apoptosis in rats following ICH.

Dynamic protein expression of NF‑κB following rat intracerebral hemorrhage and its association with apoptosis