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Effect of QKL on the expression of TNF-α in BV2 cell supernatants. Cell supernatants were collected after hypoxia/reoxygenation. ELISA was performed to measure the expression of TNF-α; the results are expressed as the means ± SD. N = 6. ## P < 0.01 compared to the control group; **P < 0.01 compared to the model group.
