A total of 96 rats were divided randomly into four equal groups: sham, and 1, 3, and 6 s electrical burns. At 0, 1, 3, and 7 days after injury, six rats in each group were sacrificed to collect samples. Tissue homogenates were prepared and centrifuged at 10,000 ×g at 4˚C for 20 min to collect supernatants. SDF-1α concentrations in the supernatants were determined according to the instructions of the SDF-1α ELISA kit.
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