Muramyl dipeptide mdp

The NLRP1 activator muramyl dipeptide (MDP) (Selleck, USA) was then added at 100 μmol for 24 hours to the oxidative stress model according to the preliminary experiment and the published studies [21 (link)–24 (link)]. The cell viability determination was the same as that in Section 2.1.
Total protein from HTR-8/SVneo cells was prepared with RIPA lysing buffer. The sample proteins (20 μg) of the different groups were separated using 10% SDS-PAGE and transferred onto PVDF membranes. These membranes were incubated with a primary antibody, followed by incubation of the anti-rabbit IgG secondary antibody. Protein expression was detected with an enhanced chemiluminescence detection kit. GAPDH served as an internal control. The antibodies included those for IL-1β (Abcam, ab216995), pro-IL-1β (Abcam, ab216995), pro-CASP1 (Abcam, ab207802), CASP1 (Abcam, ab207802), Beclin-1 (Abcam, ab207612), LC3 (Abcam, ab51520), p62 (Abcam, ab211324), ATG5 (Abcam, ab108327), ATG7 (Abcam, ab52472), NLRP3 (Abcam, ab263899), NLRP1 (BioLegend, 679802), and GAPDH (Abcam, ab128915). An ECL chemiluminescent reagent and imaging system (Bio-Rad, USA) were used to display protein bands, with the collected images analyzed using Bio-Rad software.

The NLRP1 activator muramyl dipeptide (MDP) (Selleck, United States) was added to the oxidative stress model at a concentration of 100 μmol for 24 h, in accordance with a preliminary experiment and published studies (Hsu et al., 2008 (link); Hedl and Abraham, 2013 (link); Bryant et al., 2017 (link); Yi et al., 2019 (link)).