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Takata S, Sakata-Haga H, Shimada H, Tsukada T, Sakai D, Shoji H, Tomosugi M, Nakamura Y, Ishigaki Y, Iizuka H, Hayashi Y, Hatta T. LIF-IGF Axis Contributes to the Proliferation of Neural Progenitor Cells in Developing Rat Cerebrum. Int J Mol Sci 2022; 23:13199. [PMID: 36361987 PMCID: PMC9659294 DOI: 10.3390/ijms232113199] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 10/18/2022] [Accepted: 10/27/2022] [Indexed: 09/10/2023] Open
Abstract
In rodent models, leukemia inhibitory factor (LIF) is involved in cerebral development via the placenta, and maternal immune activation is linked to psychiatric disorders in the child. However, whether LIF acts directly on neural progenitor cells (NPCs) remains unclear. This study performed DNA microarray analysis and quantitative RT-PCR on the fetal cerebrum after maternal intraperitoneal or fetal intracerebral ventricular injection of LIF at day 14.5 (E14.5) and determined that the expression of insulin-like growth factors (IGF)-1 and -2 was induced by LIF. Physiological IGF-1 and IGF-2 levels in fetal cerebrospinal fluid (CSF) increased from E15.5 to E17.5, following the physiological surge of LIF levels in CSF at E15.5. Immunostaining showed that IGF-1 was expressed in the cerebrum at E15.5 to E19.5 and IGF-2 at E15.5 to E17.5 and that IGF-1 receptor and insulin receptor were co-expressed in NPCs. Further, LIF treatment enhanced cultured NPC proliferation, which was reduced by picropodophyllin, an IGF-1 receptor inhibitor, even under LIF supplementation. Our findings suggest that IGF expression and release from the NPCs of the fetal cerebrum in fetal CSF is induced by LIF, thus supporting the involvement of the LIF-IGF axis in cerebral cortical development in an autocrine/paracrine manner.
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Affiliation(s)
- Sho Takata
- Department of Neurosurgery, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Hiromi Sakata-Haga
- Department of Anatomy, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Hiroki Shimada
- Department of Medical Science, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Tsuyoshi Tsukada
- Department of Neurosurgery, Saiseikai Toyama Hospital, Toyama 931-8533, Toyama, Japan
| | - Daisuke Sakai
- Department of Biology, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Hiroki Shoji
- Department of Biology, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Mitsuhiro Tomosugi
- Department of Anatomy, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Yuka Nakamura
- Department of Life Science, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Yasuhito Ishigaki
- Department of Life Science, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Hideaki Iizuka
- Department of Neurosurgery, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Yasuhiko Hayashi
- Department of Neurosurgery, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
| | - Toshihisa Hatta
- Department of Anatomy, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan
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