PMID- 37791056 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231005 IS - 2391-5412 (Electronic) IS - 2391-5412 (Linking) VI - 18 IP - 1 DP - 2023 TI - Bacterial lipoprotein plays an important role in the macrophage autophagy and apoptosis induced by Salmonella typhimurium and Staphylococcus aureus. PG - 20220739 LID - 10.1515/biol-2022-0739 [doi] LID - 20220739 AB - This study aimed to determine the role of bacterial lipoprotein (BLP) in autophagy and apoptosis. Western blot was used to examine autophagy biomarkers in mouse bone marrow-derived macrophages (BMDMs) after infection with Salmonella typhimurium (S. typhimurium) and Staphylococcus aureus (S. aureus) and BLP stimulation. In BMDMs, enhanced protein expression of LC3-II was observed after S. typhimurium or S. aureus infection (P < 0.05) and BLP stimulation (P < 0.05). Autophagy inhibition by chloroquine resulted in increased levels of LC3-Ⅱ and p62 protein (P < 0.05). Persistently upregulated expressions of Atg3 and Atg7 were observed following BLP stimulation (P < 0.05), and knockdown of Atg3 or Atg7 significantly attenuated BLP-enhanced protein expression of LC3-Ⅱ in BMDMs. Furthermore, we found that the autophagy inhibitor 3-methyladenine prevented BLP- and infection-induced macrophage apoptosis. BLP is not only required for autophagy and apoptosis activation in macrophages but also for regulating the balance between autophagy and apoptosis. CI - (c) 2023 the author(s), published by De Gruyter. FAU - Jiang, Shanshan AU - Jiang S AD - Institute of Hematological Research, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 71000, China. FAU - He, Jinyao AU - He J AD - Clinical Laboratory, Xi'an Medical University, Xi'an, Shaanxi, 710068, China. FAU - Zhang, Lijie AU - Zhang L AD - Institute of Hematological Research, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 71000, China. FAU - Zhao, Qiaojiajie AU - Zhao Q AD - Institute of Hematological Research, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 71000, China. FAU - Zhao, Shuqi AU - Zhao S AD - Institute of Hematological Research, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 71000, China. LA - eng PT - Journal Article DEP - 20230930 PL - Poland TA - Open Life Sci JT - Open life sciences JID - 101669614 PMC - PMC10543702 OTO - NOTNLM OT - apoptosis OT - autophagy OT - bacterial infection OT - bacterial lipoprotein OT - bone marrow-derived macrophages COIS- Conflict of interest: Authors state no conflict of interest. EDAT- 2023/10/04 06:43 MHDA- 2023/10/04 06:44 PMCR- 2023/09/30 CRDT- 2023/10/04 04:16 PHST- 2023/06/02 00:00 [received] PHST- 2023/08/04 00:00 [revised] PHST- 2023/09/04 00:00 [accepted] PHST- 2023/10/04 06:44 [medline] PHST- 2023/10/04 06:43 [pubmed] PHST- 2023/10/04 04:16 [entrez] PHST- 2023/09/30 00:00 [pmc-release] AID - biol-2022-0739 [pii] AID - 10.1515/biol-2022-0739 [doi] PST - epublish SO - Open Life Sci. 2023 Sep 30;18(1):20220739. doi: 10.1515/biol-2022-0739. eCollection 2023.