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Liang JY, Gao S, Jiang JM, Zhang P, Zou W, Tang XQ, Tang YY. Itaconate inhibits corticosterone-induced necroptosis and neuroinflammation via up-regulating menin in HT22 cells. J Physiol Biochem 2024; 80:393-405. [PMID: 38427168 DOI: 10.1007/s13105-024-01012-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 02/21/2024] [Indexed: 03/02/2024]
Abstract
Corticosterone (CORT) damages hippocampal neurons as well as induces neuroinflammation. The tricarboxylic acid cycle metabolite itaconate has an anti-inflammatory role. Necroptosis is a form of programmed cell death, also known as inflammatory cell death. Menin is a multifunctional scaffold protein, which deficiency aggravates neuroinflammation. In this study, we explored whether itaconate inhibits CORT-induced neuroinflammation as well as necroptosis and further investigated the mediatory role of Menin in this protective effect of itaconate by using an exposure of CORT to HT22 cells (a hippocampal neuronal cell line). The viability of HT22 cells was examined by the cell counting kit 8 (CCK-8). The morphology of HT22 cells was observed by transmission electron microscope (TEM). The expressions of necroptosis-related proteins (p-RIP1/RIP1, p-RIP3/RIP3, and p-MLKL/MLKL) were evaluated by western blotting. The contents of inflammatory factors were detected by an enzyme-linked immunosorbent assay (ELISA) kit. Our results showed that CORT increases the contents of pro-inflammatory factors (IL-1β, TNF-α) as well as decreases the contents of anti-inflammatory factors (IL-4, IL-10) in HT22 cells. We also found that CORT increases the expressions of necroptosis-related proteins (p-RIP1/RIP1, p-RIP3/RIP3, and p-MLKL/MLKL) and decreases the cell viability in HT22 cells, indicating that CORT induces necroptosis in HT22 cells. Itaconate improves CORT-induced neuroinflammation and necroptosis. Furthermore, itaconate upregulates the expression of Menin in CORT-exposed HT22 cells. Importantly, silencing Menin abolishes the antagonistic effect of itaconate on CORT-induced necroptosis and neuroinflammation. In brief, these results indicated that itaconate protects HT22 cells against CORT-induced neuroinflammation and necroptosis via upregulating Menin.
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Affiliation(s)
- Jin-Yu Liang
- Institute of Neuroscience, Hengyang Medical School, University of South China, 28 W Changsheng Road, Hengyang, 421001, Hunan, People's Republic of China
| | - Shan Gao
- Institute of Neuroscience, Hengyang Medical School, University of South China, 28 W Changsheng Road, Hengyang, 421001, Hunan, People's Republic of China
| | - Jia-Mei Jiang
- Institute of Neuroscience, Hengyang Medical School, University of South China, 28 W Changsheng Road, Hengyang, 421001, Hunan, People's Republic of China
| | - Pin Zhang
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336 S Dongfeng Road, Hengyang, 421002, Hunan Province, People's Republic of China
| | - Wei Zou
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336 S Dongfeng Road, Hengyang, 421002, Hunan Province, People's Republic of China
| | - Xiao-Qing Tang
- Institute of Neuroscience, Hengyang Medical School, University of South China, 28 W Changsheng Road, Hengyang, 421001, Hunan, People's Republic of China.
- Department of Neurology, The Second Affiliated Hospital, University of South China, Hengyang, 421001, Hunan, People's Republic of China.
| | - Yi-Yun Tang
- Institute of Neuroscience, Hengyang Medical School, University of South China, 28 W Changsheng Road, Hengyang, 421001, Hunan, People's Republic of China.
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Selective Menin Deletion in the Hippocampal CA1 Region Leads to Disruption of Contextual Memory in the MEN1 Conditional Knockout Mouse: Behavioral Restoration and Gain of Function following the Reintroduction of MEN1 Gene. Cells 2022; 11:cells11244019. [PMID: 36552783 PMCID: PMC9776806 DOI: 10.3390/cells11244019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 11/25/2022] [Accepted: 12/02/2022] [Indexed: 12/14/2022] Open
Abstract
Cholinergic neuronal networks in the hippocampus play a key role in the regulation of learning and memory in mammals. Perturbations of these networks, in turn, underlie neurodegenerative diseases. However, the mechanisms remain largely undefined. We have recently demonstrated that an in vitro MEN1 gene deletion perturbs nicotinic cholinergic plasticity at the hippocampal glutamatergic synapses. Furthermore, MEN1 neuronal conditional knockout in freely behaving animals has also been shown to result in learning and memory deficits, though the evidence remains equivocal. In this study, using an AVV viral vector transcription approach, we provide direct evidence that MEN1 gene deletion in the CA1 region of the hippocampus indeed leads to contextual fear conditioning deficits in conditional knockout animals. This loss of function was, however, recovered when the same animals were re-injected to overexpress MEN1. This study provides the first direct evidence for the sufficiency and necessity of MEN1 in fear conditioning, and further endorses the role of menin in the regulation of cholinergic synaptic machinery in the hippocampus. These data underscore the importance of further exploring and revisiting the cholinergic hypothesis that underlies neurodegenerative diseases that affect learning and memory.
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Batool S, Akhter B, Zaidi J, Visser F, Petrie G, Hill M, Syed NI. Neuronal Menin Overexpression Rescues Learning and Memory Phenotype in CA1-Specific α7 nAChRs KD Mice. Cells 2021; 10:3286. [PMID: 34943798 PMCID: PMC8699470 DOI: 10.3390/cells10123286] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/14/2021] [Accepted: 11/17/2021] [Indexed: 01/08/2023] Open
Abstract
The perturbation of nicotinic cholinergic receptors is thought to underlie many neurodegenerative and neuropsychiatric disorders, such as Alzheimer's and schizophrenia. We previously identified that the tumor suppressor gene, MEN1, regulates both the expression and synaptic targeting of α7 nAChRs in the mouse hippocampal neurons in vitro. Here we sought to determine whether the α7 nAChRs gene expression reciprocally regulates the expression of menin, the protein encoded by the MEN1 gene, and if this interplay impacts learning and memory. We demonstrate here that α7 nAChRs knockdown (KD) both in in vitro and in vivo, initially upregulated and then subsequently downregulated menin expression. Exogenous expression of menin using an AAV transduction approach rescued α7 nAChRs KD mediated functional and behavioral deficits specifically in hippocampal (CA1) neurons. These effects involved the modulation of the α7 nAChR subunit expression and functional clustering at the synaptic sites. Our data thus demonstrates a novel and important interplay between the MEN1 gene and the α7 nAChRs in regulating hippocampal-dependent learning and memory.
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Affiliation(s)
- Shadab Batool
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB T2N 4N1, Canada; (S.B.); (B.A.); (F.V.); (G.P.); (M.H.)
- Department of Neuroscience, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Basma Akhter
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB T2N 4N1, Canada; (S.B.); (B.A.); (F.V.); (G.P.); (M.H.)
| | - Jawwad Zaidi
- Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada;
| | - Frank Visser
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB T2N 4N1, Canada; (S.B.); (B.A.); (F.V.); (G.P.); (M.H.)
| | - Gavin Petrie
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB T2N 4N1, Canada; (S.B.); (B.A.); (F.V.); (G.P.); (M.H.)
- Department of Neuroscience, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Matthew Hill
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB T2N 4N1, Canada; (S.B.); (B.A.); (F.V.); (G.P.); (M.H.)
| | - Naweed I. Syed
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, AB T2N 4N1, Canada
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