Western blotting and semi-quantitative analysis were performed as in our previous study [36 (link)]. To investigate the effect of GSZD on the expression levels of HDAC1, HSP90AA1, NFKB2, IKBKB and TNF-α proteins, HFLS were treated with 10 ng/mL of IL-1β in the presence of various concentrations of GSZD. Antibodies against the following proteins were used: HDAC1 (rabbit polyclonal antibody; dilution 1:1000; Abcam, Cambridge, UK), HSP90AA1 (rabbit polyclonal antibody; dilution 1:500; Abcam, Cambridge, UK), NFKB2 (rabbit monoclonal antibody; dilution 1:1000; Cell Signaling), IKKB (rabbit monoclonal antibody; dilution 1:1000; Abcam, Cambridge, UK), and TNF-α (rabbit polyclonal antibody; dilution 1:100; Abcam, Cambridge, UK). All experiments were performed in triplicate. The mean normalized protein expression ± SD was calculated from independent experiments.
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