PMID- 37686068 OWN - NLM STAT- MEDLINE DCOM- 20230911 LR - 20230915 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 24 IP - 17 DP - 2023 Aug 26 TI - NLRC5 Deficiency Reduces LPS-Induced Microglial Activation via Inhibition of NF-kappaB Signaling and Ameliorates Mice's Depressive-like Behavior. LID - 10.3390/ijms241713265 [doi] LID - 13265 AB - Microglia are believed to be the key immune effectors of the central immune microenvironment, and their dysregulation is associated with neuroinflammation and mood disorders. Nucleotide-binding oligomerization domain-like receptor family caspase recruitment domain-containing five (NLRC5) is a new member of the Nod-like receptor family. Recently, NLRC5 has been reported to be expressed by microglia. Nonetheless, the exact roles of NLRC5 in microglial activation and its function in depression have not been investigated yet. Herein, we found that reducing NLRC5 decreased lipopolysaccharide (LPS)-induced secretion of pro-inflammatory cytokines (IL-1beta, IL-6, and TNF-alpha) in primary cultured microglia and microglial cell lines but not in bone marrow-derived macrophages (BMDMs). In more detail, reducing NLRC5 diminished the secretion of LPS-induced cytokines by attenuating IKKalpha/beta phosphorylation and inhibiting NF-kappaB signaling. Moreover, the expression of Nlrc5 in the hippocampus of LPS- or chronic unpredictable mild stress (CUMS)-induced depressive mice was increased. In line with the in vitro findings, Nlrc5 deficiency inhibited microglial activation in the mouse hippocampus and improved LPS- or CUMS-induced depressive-like behaviors. In summary, we demonstrated the critical role of NLRC5 in LPS-induced microglial activation and LPS- or CUMS-induced depressive mouse models. FAU - Sun, Chen AU - Sun C AD - Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Microbiology and Immunology, School of Medicine, Southeast University, Nanjing 210009, China. FAU - Shen, Yuqing AU - Shen Y AD - Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Microbiology and Immunology, School of Medicine, Southeast University, Nanjing 210009, China. FAU - Liu, Piaopiao AU - Liu P AD - Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Southeast University, Nanjing 210009, China. FAU - Shen, Yi AU - Shen Y AD - Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Southeast University, Nanjing 210009, China. FAU - Hu, Yue AU - Hu Y AD - Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Southeast University, Nanjing 210009, China. FAU - Li, Ping AU - Li P AD - Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Southeast University, Nanjing 210009, China. FAU - Zhang, Ying AU - Zhang Y AD - Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Microbiology and Immunology, School of Medicine, Southeast University, Nanjing 210009, China. FAU - Miao, Fengqin AU - Miao F AD - Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Southeast University, Nanjing 210009, China. FAU - Zhang, Jianqiong AU - Zhang J AD - Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Microbiology and Immunology, School of Medicine, Southeast University, Nanjing 210009, China. AD - Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Southeast University, Nanjing 210009, China. LA - eng GR - 2021ZD0204001/Scientific and technological innovation 2030 (STI2030)-Major-Projects of China/ PT - Journal Article DEP - 20230826 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (NF-kappa B) RN - 0 (Lipopolysaccharides) RN - 0 (Cytokines) RN - 0 (NLRC5 protein, mouse) RN - 0 (Intracellular Signaling Peptides and Proteins) SB - IM MH - Animals MH - Mice MH - *NF-kappa B MH - *Lipopolysaccharides/toxicity MH - Microglia MH - Signal Transduction MH - Cytokines MH - Intracellular Signaling Peptides and Proteins/genetics PMC - PMC10487775 OTO - NOTNLM OT - NF-kappaB OT - NLRC5 OT - depressive mouse model OT - microglia OT - neuroinflammation COIS- The authors declare that there is no conflict of interest regarding the publication of this paper. EDAT- 2023/09/09 11:44 MHDA- 2023/09/11 06:42 PMCR- 2023/08/26 CRDT- 2023/09/09 01:11 PHST- 2023/06/19 00:00 [received] PHST- 2023/08/09 00:00 [revised] PHST- 2023/08/23 00:00 [accepted] PHST- 2023/09/11 06:42 [medline] PHST- 2023/09/09 11:44 [pubmed] PHST- 2023/09/09 01:11 [entrez] PHST- 2023/08/26 00:00 [pmc-release] AID - ijms241713265 [pii] AID - ijms-24-13265 [pii] AID - 10.3390/ijms241713265 [doi] PST - epublish SO - Int J Mol Sci. 2023 Aug 26;24(17):13265. doi: 10.3390/ijms241713265.