PMID- 33259865 OWN - NLM STAT- MEDLINE DCOM- 20210114 LR - 20210114 IS - 1879-0631 (Electronic) IS - 0024-3205 (Linking) VI - 265 DP - 2021 Jan 15 TI - Possible mechanism and potential application of anti-opioid effect of diazepam-binding inhibitor. PG - 118836 LID - S0024-3205(20)31589-7 [pii] LID - 10.1016/j.lfs.2020.118836 [doi] AB - AIMS: Our previous study has demonstrated that porcine diazepam-binding inhibitor (pDBI) and its active fragments, pDBI-16 and pDBI-19, have inhibition effect on morphine analgesia in mice. The present study aimed to investigate the underlying mechanism and potential application of this anti-opioid effect. MATERIALS AND METHODS: Effect of DBI on morphine analgesia was examined by the tail electric stimulation vocalization test. Complementary peptides and antiserum were used to further confirm the effect of DBI in morphine tolerance and dependence. Pharmacological and microinjection methods were used to investigate the underlying mechanism. KEY FINDINGS: Firstly, pDBI administered either intracerebroventricularly or intravenously dose-dependently inhibited morphine analgesia, while blocking DBI-16 or DBI-19 by the complementary peptides for DBI-16 (CP-DBI-16) or DBI-19 (CP-DBI-19) potentiated it in mice. Secondly, explicit immunoexpression of DBI in the lateral habenular (LHb) was observed in naive rats, and intra-LHb injection of pDBI dose-dependently abolished analgesic effect produced by intra-periaqueductal gray (PAG) injection of morphine in rats. Thirdly, pretreatment with N-Methyl-d-Aspartate receptor (NMDAR) antagonist MK-801 or nitric oxide (NO) synthase inhibitor L-NAME abolished the inhibition effect of pDBI, pDBI-16 or pDBI-19 on morphine analgesia in mice. Finally, antiserum against DBI dose-dependently reversed analgesic tolerance induced by increasing doses of morphine twice daily for 13 days in mice, while CP-DBI-16 or CP-DBI-19 significantly inhibited naloxone-precipitated morphine withdrawal jumping in mice. SIGNIFICANCE: Taken together, our results demonstrated that NMDAR/NO signaling and LHb-PAG pathway are crucially involved in the anti-opioid effect of DBI, which could provide a potential biological target for opioid tolerance and dependence. CI - Copyright (c) 2020. Published by Elsevier Inc. FAU - Qin, Wangjun AU - Qin W AD - Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, China. Electronic address: qwj2004wang@163.com. FAU - Qu, Hong AU - Qu H AD - Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China. FAU - Pan, Lin AU - Pan L AD - Institute of Clinical Medical Science, China-Japan Friendship Hospital, Beijing 100029, China. FAU - Sun, Weiliang AU - Sun W AD - Institute of Clinical Medical Science, China-Japan Friendship Hospital, Beijing 100029, China. FAU - Chen, Yuzhen AU - Chen Y AD - Institute of Clinical Medical Science, China-Japan Friendship Hospital, Beijing 100029, China; State Key Laboratory of Membrane Biology, Peking University, Beijing 100871, China. Electronic address: chenyuzhen2016pku@163.com. FAU - Wu, Caihong AU - Wu C AD - State Key Laboratory of Membrane Biology, Peking University, Beijing 100871, China. LA - eng PT - Journal Article DEP - 20201128 PL - Netherlands TA - Life Sci JT - Life sciences JID - 0375521 RN - 0 (Analgesics, Opioid) RN - 0 (Diazepam Binding Inhibitor) RN - 0 (Narcotic Antagonists) RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 31C4KY9ESH (Nitric Oxide) RN - 36B82AMQ7N (Naloxone) RN - 76I7G6D29C (Morphine) SB - IM MH - Analgesics, Opioid/administration & dosage/*pharmacology MH - Animals MH - Diazepam Binding Inhibitor/administration & dosage/*pharmacology MH - Dose-Response Relationship, Drug MH - Drug Tolerance MH - Electric Stimulation MH - Male MH - Mice MH - Morphine/administration & dosage/*pharmacology MH - Naloxone/pharmacology MH - Narcotic Antagonists/administration & dosage/*pharmacology MH - Nitric Oxide/metabolism MH - Opioid-Related Disorders/drug therapy MH - Rats MH - Rats, Wistar MH - Receptors, N-Methyl-D-Aspartate/metabolism MH - Swine MH - Tail MH - Vocalization, Animal/drug effects OTO - NOTNLM OT - Anti-opioid OT - Diazepam-binding inhibitor OT - Lateral habenular OT - NMDA receptor OT - NO EDAT- 2020/12/02 06:00 MHDA- 2021/01/15 06:00 CRDT- 2020/12/01 20:08 PHST- 2020/10/15 00:00 [received] PHST- 2020/11/18 00:00 [revised] PHST- 2020/11/20 00:00 [accepted] PHST- 2020/12/02 06:00 [pubmed] PHST- 2021/01/15 06:00 [medline] PHST- 2020/12/01 20:08 [entrez] AID - S0024-3205(20)31589-7 [pii] AID - 10.1016/j.lfs.2020.118836 [doi] PST - ppublish SO - Life Sci. 2021 Jan 15;265:118836. doi: 10.1016/j.lfs.2020.118836. Epub 2020 Nov 28.