Cell Culture. RAW 264.7 cell line (BCRC 60001) was obtained from
the Bioresource Collection and Research Center (BCRC, Food Industry
Research and Development Institute, Hsinchu, Taiwan). Cells were
cultured in DMEM with 10% FBS, 2 mM L-glutamine and 100 U/mL
penicillin-streptomycin. The cells were cultured at 37 C in a humidified
5% CO2 incubator.