PMID- 32170671 OWN - NLM STAT- MEDLINE DCOM- 20211119 LR - 20211119 IS - 1522-1709 (Electronic) IS - 1520-9512 (Linking) VI - 24 IP - 4 DP - 2020 Dec TI - TLR2 antagonism attenuates the hippocampal neuronal damage in a murine model of sleep apnea via inhibiting neuroinflammation and oxidative stress. PG - 1613-1621 LID - 10.1007/s11325-020-02030-3 [doi] AB - BACKGROUND: Obstructive sleep apnea (OSA) in humans chronically promotes the neuronal damage in the hippocampus. Toll-like receptor 2 (TLR2) is pivotal for the development of numerous hippocampal diseases. Chronic intermittent hypoxia (CIH) is a prominent feature of OSA. Here in our study, the effects of TLR2 antagonism on the neural damage elicited by CIH were examined. METHODS: Ortho-vanillin (O-vanillin) is an inhibitor of TLR2. Adult male mice were subjected to 8 h of intermittent hypoxia per day with or without O-vanillin for 28 days. Neuronal damage, the number of microglia, the interaction of TLR2 with its adapter protein myeloid differentiation factor 88 (MYD88), the expressions of inflammatory cytokines, and the oxidative stress were observed. RESULTS: O-vanillin inhibited the increased interaction of TLR2 and MyD88, the activation of NFkappaB, the aggregation of microglia, the overexpression of proinflammatory agents, the elevation of oxidative stress, and hippocampal neuron cell apoptosis induced by CIH. CONCLUSIONS: Our experiments indicate that TLR2 antagonism may alleviate the hippocampal neuronal damage caused by CIH via inhibiting neuroinflammation and oxidative stress. FAU - Deng, Yan AU - Deng Y AD - Department of Respiratory and Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, Hubei, China. FAU - Liu, Kui AU - Liu K AD - Department of Respiratory and Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, Hubei, China. FAU - Pan, Yueying AU - Pan Y AD - Department of Respiratory and Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, Hubei, China. FAU - Ren, Jie AU - Ren J AD - Department of Respiratory and Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, Hubei, China. FAU - Shang, Jin AU - Shang J AD - Department of Respiratory and Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, Hubei, China. FAU - Chen, Lei AU - Chen L AD - Department of Respiratory and Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, Hubei, China. FAU - Liu, Huiguo AU - Liu H AD - Department of Respiratory and Critical Care Medicine, Tongji Hospital, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, Hubei, China. hgliu@tjh.tjmu.edu.cn. LA - eng GR - 81700089/National Natural Science Foundation of China/ PT - Journal Article DEP - 20200313 PL - Germany TA - Sleep Breath JT - Sleep & breathing = Schlaf & Atmung JID - 9804161 RN - 0 (Benzaldehydes) RN - 0 (Tlr2 protein, mouse) RN - 0 (Toll-Like Receptor 2) RN - 008LR748FI (2-vanillin) SB - IM MH - Animals MH - Apoptosis MH - Benzaldehydes/administration & dosage MH - Disease Models, Animal MH - Encephalitis/*metabolism MH - Hippocampus/*metabolism/pathology MH - Male MH - Mice, Inbred C57BL MH - Microglia/metabolism MH - Neurons/*metabolism MH - *Oxidative Stress MH - Sleep Apnea Syndromes/*metabolism MH - Toll-Like Receptor 2/antagonists & inhibitors/*metabolism OTO - NOTNLM OT - Intermittent hypoxia OT - Neuroinflammation OT - Ortho-vanillin OT - Sleep apnea OT - Toll-like receptor 2 EDAT- 2020/03/15 06:00 MHDA- 2021/11/20 06:00 CRDT- 2020/03/15 06:00 PHST- 2019/05/06 00:00 [received] PHST- 2020/02/05 00:00 [accepted] PHST- 2020/01/28 00:00 [revised] PHST- 2020/03/15 06:00 [pubmed] PHST- 2021/11/20 06:00 [medline] PHST- 2020/03/15 06:00 [entrez] AID - 10.1007/s11325-020-02030-3 [pii] AID - 10.1007/s11325-020-02030-3 [doi] PST - ppublish SO - Sleep Breath. 2020 Dec;24(4):1613-1621. doi: 10.1007/s11325-020-02030-3. Epub 2020 Mar 13.