PMID- 29382416 OWN - NLM STAT- MEDLINE DCOM- 20180809 LR - 20181202 IS - 1007-8738 (Print) IS - 1007-8738 (Linking) VI - 33 IP - 12 DP - 2017 Dec TI - [Caspase-1 inhibitor AC-YVAD-CMK blocks IL-1beta secretion of bone marrow-derived macrophages induced by Acinetobacter baumannii]. PG - 1594-1599 AB - Objective To explore the effect of caspase-1 selective inhibitor AC-YVAD-CMK on IL-1beta secretion of bone marrow-derived macrophages (BMDMs) induced by Acinetobacter baumannii (A. baumannii). Methods Macrophages were separated from C57BL/6 mice which were stimulated using different concentrations of A. baumannii. The level of IL-1beta in the culture supernatant was detected by ELISA. The expression of pro-IL-1beta mRNA and protein were detected using the real-time quantitative PCR and Western blot analysis, respectively. The role of caspase-1 in the secretion of IL-1beta was tested by AC-YVAD-CMK treatment to block caspase-1. Pneumonia models in C57BL/6 mice were prepared by A. baumannii inoculation. The level of IL-1beta in bronchoalveolar lavage fluid (BALF) and the morphology of lung were detected by ELISA or HE staining, respectively. Results IL-1beta level in the culture supernatant was up-reregulated by A. baumannii stimulation in a dose-dependent manner. The expression of pro-IL-1beta mRNA and protein were not significantly changed with A. baumannii stimulation. Mature IL-1beta secretion was blocked by AC-YVAD-CMK either in vitro or in vivo. The damage of lung induced by A. baumannii infection in mice was ameliorated by AC-YVAD-CMK. Conclusion AC-YVAD-CMK alleviates pulmonary pathological damage by reducing the caspase-1-mediated IL-1beta secretion. FAU - Zhang, Yimin AU - Zhang Y AD - Department of Pathogenic Biology and Examination, Shaanxi University of Chinese Medicine, Xianyang 712046, China. *Corresponding author, E-mail: zhangyimin26@163.com. FAU - Zhou, Xuening AU - Zhou X AD - Department of Clinical Laboratory, First Affiliated Hospital, Shaanxi University of Chinese Medicine, Xianyang 712000, China. FAU - Zhang, Hongfang AU - Zhang H AD - Department of Pathogenic Biology and Examination, Shaanxi University of Chinese Medicine, Xianyang 712046, China. FAU - Huan, Cheng AU - Huan C AD - Department of Pathogenic Biology and Examination, Shaanxi University of Chinese Medicine, Xianyang 712046, China. FAU - Ye, Zhengrong AU - Ye Z AD - Department of Pathogenic Biology and Examination, Shaanxi University of Chinese Medicine, Xianyang 712046, China. LA - chi PT - Journal Article PL - China TA - Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi JT - Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology JID - 101139110 RN - 0 (Amino Acid Chloromethyl Ketones) RN - 0 (Caspase Inhibitors) RN - 0 (Interleukin-1beta) RN - 0 (N-acetyl-tyrosyl-valyl-alanyl-aspartyl chloromethyl ketone) RN - EC 3.4.22.36 (Caspase 1) SB - IM MH - Acinetobacter baumannii/*pathogenicity MH - Amino Acid Chloromethyl Ketones/*pharmacology MH - Animals MH - Caspase 1/*physiology MH - Caspase Inhibitors/*pharmacology MH - Interleukin-1beta/*metabolism MH - Macrophages/*metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL EDAT- 2018/02/01 06:00 MHDA- 2018/08/10 06:00 CRDT- 2018/02/01 06:00 PHST- 2018/02/01 06:00 [entrez] PHST- 2018/02/01 06:00 [pubmed] PHST- 2018/08/10 06:00 [medline] PST - ppublish SO - Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi. 2017 Dec;33(12):1594-1599.