Figure 9. BM-derived cells mediate pathogenic effects of Casp-1 in ALD.

(A–E) LMNCs or primary hepatocytes were isolated from the livers of chow-fed WT mice as described in Methods. Pro–Casp-1 levels in cell lysate were evaluated using immunoblotting and normalized to β-actin (A). Expression of pro-Casp-1, Asc, Nlrp3, and pro-Il-1b was measured using qPCR (B). WT mice received 1 dose of intragastric EtOH (5 g/kg body weight) or isocaloric dextran-maltose per day on 3 consecutive days. 12 hours after the third intragastric gavage, LMNCs or primary hepatocytes were isolated. Cleaved forms of Casp-1 and IL-1β in cell lysates (C) were analyzed using antibodies that identify both full-length (short exposure, presented in linear contrast mode) and cleaved forms (long exposure, presented in sigmoidal contrast mode) and normalized to β-actin (D and E). LMNCs or hepatocytes were pooled from 5 (A and C–E) or 11 (B) mice per group. (F–L) WT/WT-BM, Casp-1–KO/WT-BM, and WT/Casp-1–KO–BM mice were fed control (n = 4–5 per genotype) or alcohol (n = 8 per genotype) diet and sacrificed 4 weeks later, as described in Methods. Liver injury was assessed by liver H&E staining and serum ALT (F and H). Steatosis was evaluated by Oil-red-O staining (G and I). Serum levels of IL-1β (J), TNF-α (K), and MCP-1 (L) were measured by specific ELISA. Numbers in graphs denote P values. Original magnification, ×200.