Publication protocol
RAW 264.7 cells (500000 cells/well) were seeded in 6-well plates and treated for 4 h with LPS (1 µg/mL), with or without pre-incubation with EnP(5,8) for 2 h. Afterwards, the supernatant was removed and the cells were disrupted in 1 mL of PureZOL™ reagent. Then, the samples were transferred to a RNase-free tube and 0.2 mL of chloroform were added. The mixture was shaken vigorously for 15 s. After 5 min incubation at room temperature, the samples were centrifuged at 12,000× g for 15 min at 4 °C. Following centrifugation, the aqueous phase containing the RNA was immediately transferred to a new RNase-free tube and 0.5 mL of isopropyl alcohol were added, and mixture was incubated at room temperature for 5 min. Afterwards, the tubes were centrifuged at 12,000× g for 10 min at 4 °C, the RNA appearing as a white pellet on the side and bottom of the tube. Supernatant was carefully discarded and the RNA pellet was washed with 1 mL of 75% of ethanol. After vortexing, the mixture was centrifuged at 7500× g for 5 min at 4 °C and the supernatant was carefully discarded. Then, the RNA pellet was air-dried for about 5 min and reconstituted in 50 µL of PCR grade water. Subsequently, the RNA was quantified in a Qubit 4 fluorometer (Invitrogen by Thermo Fisher Scientific; Waltham, MA, USA), using the Qubit™ RNA HS assay kit. The RNA quality and integrity was then evaluated using the QubitTM RNA IQ assay kit. In order to obtain the complementary DNA, 1 µg of RNA was mixed with 4 µL SuperScript™ IV VILO™ Master Mix in a 20-µL reaction. The reverse-transcribed reaction involved three steps: incubation at 25 °C for 10 min, incubation at 50 °C for 10 min, and incubation at 85 °C for 5 min.
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