Influence of DPI and flavonoids on phagocytosis of myelin. To determine the influence of DPI, a NADPH oxidase blocker, and flavonoids on myelin phagocytosis, these substances were added together with fluorescently labeled myelin. Phagocytosis is determined as MFI of the macrophages. Data are the mean of 4 separate experiments (n = 4) ± SEM. *= p < 0.05. Both luteolin and quercetin significantly blocked phagocytosis of myelin by control, CA and AA macrophages. DPI only significantly reduced phagocytosis of myelin by control and AA macrophages. DPI did not significantly decrease phagocytosis of myelin by CA macrophages.