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Phagocytosis index indicating efficacy of RBC engulfment by rat brain microglia at 2h after adding CFDA-RBC with Nrf2-decoy (ARE-Decoy) or mutant decoy (Mut-Decoy), and absence or presence of 2μM SF. Microglia were pre-treated with the Nrf-2 decoy or mutant-decoy for 24h before the assessment of phagocytosis, while SF was added 16h before the exposure to CFDA-RBC. Results are expressed as mean ± SEM (n=3). *p<0.05 and **p 0.01, compared with the vehicle control (JetPEI+RBC).
