HMC3 cells were seeded into a 6-well plate at 1 × 106 cells/well in EMEM without FBS. After 1-hour incubation with designated treatments, the supernatant was removed, and cells were washed three times by DPBS. The cell lysate was obtained by lysing cells using NP-40 lysis buffer (1% NP40, 50 mM Tris-HCl, pH = 8, 150 mM NaCl) with Halt™ Protease and Phosphatase Inhibitor Cocktail (100X) (ThermoFisher). After removing debris by centrifugation, the total protein amount normalized by Pierce BCA Protein Assay Kit (ThermoFisher). Protein samples were resolved by 10% SDS-polyacrylamide gels (Biorad) and later transferred onto Immun-Blot PVDF membranes (Biorad). Proteins were probed with specific primary antibodies and secondary antibodies diluted in 5% BSA TBST [21 (link), 24 (link), 29 (link)]. The primary antibodies used are: SYK (1:1000, Cell Signaling 13198S), Phospho-Syk (Tyr525/526) (1:1000, Thermo Fisher MA5-14918), β-Actin (1:1000, Cell Signaling 4970S), SHP1 (1:1000, Cell Signaling 3759S), Phospho-SHP-1 (Tyr564) (1:1000, Cell Signaling 8849S), and LILRB2 (1:1000, Thermo Fisher PA5-46983).
The immunoreactive bands were visualized with the West Pico PLUS Chemiluminescent Substrate (ThermoFisher). The immunoreactive bands were quantified using ImageJ. Three independent treatment replicates were conducted with the representative immunoblot shown.
The immunoreactive bands were visualized with the West Pico PLUS Chemiluminescent Substrate (ThermoFisher). The immunoreactive bands were quantified using ImageJ. Three independent treatment replicates were conducted with the representative immunoblot shown.