PMID- 30981863 OWN - NLM STAT- MEDLINE DCOM- 20200109 LR - 20200109 IS - 1873-7544 (Electronic) IS - 0306-4522 (Linking) VI - 408 DP - 2019 Jun 1 TI - Interleukin-18-deficient mice develop hippocampal abnormalities related to possible depressive-like behaviors. PG - 147-160 LID - S0306-4522(19)30241-6 [pii] LID - 10.1016/j.neuroscience.2019.04.003 [doi] AB - Interleukin-18 (IL-18) is an inflammatory cytokine linked to major depressive disorder (MDD). MDD is closely related to metabolic disorders, such as diabetes mellitus (DM) and obesity. Moreover, DM is associated with cognitive impairment and promotes apoptosis of hippocampal cells by activating pro-apoptotic and inhibiting anti-apoptotic factors. IL-18-deficient (Il18(-/-)) mice are obese and have DM. Therefore, we hypothesized a close relationship between IL-18 and death of hippocampal cells, affecting neurogenesis related to behavioral changes such as MDD. Il18(-/-) male mice were generated on the C57Bl/6 background and Il18(+/+) mice were used as controls. Behavioral, histopathological, and molecular responses, as well as responses to intracerebral recombinant IL-18 administration, were examined. Compared with Il18(+/+) mice, Il18(-/-) mice had impaired learning and memory and exhibited lower motivation. In the Il18(-/-) mice, degenerated mitochondria were detected in synaptic terminals in the molecular layer, the polymorphic layer, and in mossy fibers in the dentate gyrus, suggesting mitochondrial abnormalities. Because of the degeneration of mitochondria in the dentate gyrus, in which pro-apoptotic molecules were upregulated and anti-apoptotic factors were decreased, apoptosis inducers were not cleaved, indicating inhibition of apoptosis. In addition, neurogenesis in the dentate gyrus and the maturity of neuronal cells were decreased in the Il18(-/-) mice, while intracerebral administration of recombinant IL-18 promoted significant recovery of neurogenesis. Our findings suggested that IL-18 was indispensable for mitochondrial homeostasis, sustaining clearance of degenerative neural cells, and supporting neurogenesis, normal neuronal maturation and hippocampal function. CI - Copyright (c) 2019 IBRO. Published by Elsevier Ltd. All rights reserved. FAU - Yamanishi, Kyosuke AU - Yamanishi K AD - Department of Neuropsychiatry, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo 6638501, Japan. FAU - Doe, Nobutaka AU - Doe N AD - Laboratory of Neurogenesis and CNS Repair, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo 6638501, Japan; Laboratory of Psychology, General Education Center, Hyogo University of Health Sciences, 1-3-6 Minatojima, Chuo-ku, Kobe, Hyogo, 6508530, Japan. FAU - Mukai, Keiichiro AU - Mukai K AD - Department of Neuropsychiatry, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo 6638501, Japan. FAU - Ikubo, Kaoru AU - Ikubo K AD - Department of Neuropsychiatry, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo 6638501, Japan. FAU - Hashimoto, Takuya AU - Hashimoto T AD - Department of Neuropsychiatry, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo 6638501, Japan. FAU - Uwa, Noriko AU - Uwa N AD - Department of Neuropsychiatry, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo 6638501, Japan. FAU - Sumida, Miho AU - Sumida M AD - Laboratory of Psychology, General Education Center, Hyogo University of Health Sciences, 1-3-6 Minatojima, Chuo-ku, Kobe, Hyogo, 6508530, Japan. FAU - El-Darawish, Yosif AU - El-Darawish Y AD - Laboratory of Tumor Immunology and Cell Therapy, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo, 6638501, Japan. FAU - Gamachi, Naomi AU - Gamachi N AD - Laboratory of Tumor Immunology and Cell Therapy, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo, 6638501, Japan. FAU - Li, Wen AU - Li W AD - Laboratory of Tumor Immunology and Cell Therapy, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo, 6638501, Japan. FAU - Kuwahara-Otani, Sachi AU - Kuwahara-Otani S AD - Department of Anatomy and Cell Biology, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo, 6638501, Japan. FAU - Maeda, Seishi AU - Maeda S AD - Department of Anatomy and Cell Biology, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo, 6638501, Japan. FAU - Watanabe, Yuko AU - Watanabe Y AD - Hirakata General Hospital for Developmental Disorders, 2-1-1 Tsudahigashi, Hirakata, Osaka 5730122, Japan. FAU - Hayakawa, Tetsu AU - Hayakawa T AD - Laboratory of Tumor Immunology and Cell Therapy, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo, 6638501, Japan. FAU - Yamanishi, Hiromichi AU - Yamanishi H AD - Hirakata General Hospital for Developmental Disorders, 2-1-1 Tsudahigashi, Hirakata, Osaka 5730122, Japan. FAU - Matsuyama, Tomohiro AU - Matsuyama T AD - Laboratory of Neurogenesis and CNS Repair, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo 6638501, Japan. FAU - Yagi, Hideshi AU - Yagi H AD - Department of Anatomy and Cell Biology, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo, 6638501, Japan. FAU - Okamura, Haruki AU - Okamura H AD - Laboratory of Tumor Immunology and Cell Therapy, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo, 6638501, Japan. FAU - Matsunaga, Hisato AU - Matsunaga H AD - Department of Neuropsychiatry, Hyogo College of Medicine, 1-1, Mukogawa, Nishinomiya, Hyogo 6638501, Japan. Electronic address: hisa1311@hyo-med.ac.jp. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190411 PL - United States TA - Neuroscience JT - Neuroscience JID - 7605074 RN - 0 (Interleukin-18) SB - IM MH - Animals MH - Cell Death/drug effects/*physiology MH - Depression/genetics/*metabolism/pathology MH - Hippocampus/drug effects/metabolism/*pathology MH - Interleukin-18/genetics/*metabolism/pharmacology MH - Learning/drug effects/physiology MH - Memory/drug effects/physiology MH - Mice MH - Mice, Knockout MH - Motivation/drug effects/physiology MH - Neurogenesis/drug effects/physiology MH - Neurons/drug effects/*metabolism/pathology OTO - NOTNLM OT - depression OT - hippocampus OT - interleukin-18 OT - learning and memory OT - mitochondria OT - neurogenesis EDAT- 2019/04/15 06:00 MHDA- 2020/01/10 06:00 CRDT- 2019/04/15 06:00 PHST- 2018/08/25 00:00 [received] PHST- 2019/03/27 00:00 [revised] PHST- 2019/04/02 00:00 [accepted] PHST- 2019/04/15 06:00 [pubmed] PHST- 2020/01/10 06:00 [medline] PHST- 2019/04/15 06:00 [entrez] AID - S0306-4522(19)30241-6 [pii] AID - 10.1016/j.neuroscience.2019.04.003 [doi] PST - ppublish SO - Neuroscience. 2019 Jun 1;408:147-160. doi: 10.1016/j.neuroscience.2019.04.003. Epub 2019 Apr 11.