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Yang ZY, Liu J, Chu HC. Effect of NMDAR-NMNAT1/2 pathway on neuronal cell damage and cognitive impairment of sevoflurane-induced aged rats. Neurol Res 2020; 42:108-117. [PMID: 31941414 DOI: 10.1080/01616412.2019.1710393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Objective: The possible effect of NMDAR (N-methyl-D-aspartate receptor)-NMNAT1/2 (nicotinamide/nicotinic acid mono-nucleotide adenylyltransferase) signaling pathway on the neuronal cell damage and cognitive impairment of aged rats anesthetized by sevoflurane was explored.Methods: Adult male Wistar rats were selected and divided into Control, Sevo (Sevoflurane), Sevo+DCS (NMDAR agonist D-cycloserine) 30 mg/kg, Sevo+DCS 100 mg/kg, and Sevo+DCS 200 mg/kg groups. Morris water maze and fear conditioning text were used to observe cognitive function changes of rats. The inflammatory cytokines were determined by quantitative real-time polymerase chain reaction (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA) assay, neuronal apoptosis by terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick-end labelling (TUNEL) staining and MDAR-NMNAT1/2 pathway-related proteins by Western blotting.Results: The longer escape latency, decreased platform crossing times and reduced staying time spent in platform quadrant were found in rats from Sevo group, with decreased percentage of freezing time in contextual test and tone cued test; and meanwhile, these rats had increased inflammatory cytokines (interleukin (IL)-1β, tumor necrosis factor (TNF-α), IL-6, and IL-8) and neuronal apoptosis, but declined expressions of MDAR-NMNAT1/2 pathway-related proteins. However, the above changes were exhibited an opposite tendency in those Sevo rats treated with different concentrations of DCS (including 30, 100, and 200 mg/kg, respectively). Particularly, the improving effect of low-dose DCS on each aspect in aged rats was better than high-dose ones.Conclusion: Activation of NMDAR-NMNAT1/2 signaling pathway could not only reduce neuronal apoptosis, but also alleviate sevoflurane-induced neuronal inflammation and cognitive impairment in aged rats.
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Affiliation(s)
- Zhan-Yun Yang
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, China.,Department of Anesthesiology, Jining No. 1 People's Hospital, Jining, Shandong Province, China
| | - Jun Liu
- Department of Orthopedics, Jining No. 2 People's Hospital, Jining, Shandong Province, China
| | - Hai-Chen Chu
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, China
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Gu C, Hu Q, Wu J, Mu C, Ren H, Liu CF, Wang G. P7C3 Inhibits LPS-Induced Microglial Activation to Protect Dopaminergic Neurons Against Inflammatory Factor-Induced Cell Death in vitro and in vivo. Front Cell Neurosci 2018; 12:400. [PMID: 30455635 PMCID: PMC6230654 DOI: 10.3389/fncel.2018.00400] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 10/17/2018] [Indexed: 12/17/2022] Open
Abstract
Parkinson’s disease (PD) is the second most common neurodegenerative disorder. Although its pathogenesis remains unclear, growing evidencce suggests that microglia-mediated neuroinflammation contributes greatly to the progression of PD. P7C3, an aminopropyl carbazole, possesses significant neuroprotective effects in several neurodegenerative disease animal models, including PD. In this study, we designed to investigate the effects of P7C3 on neuroinflammation. We showed that P7C3 specially suppressed the expression of lipopolysaccharide (LPS)-induced pro-inflammatory factors but not influenced the anti-inflammatory factors in microglia. The inhibition of the nuclear factor κB (NF-κB) signaling pathway was involved in the mechanisms of the anti-inflammatory effects by P7C3. LPS-induced activation of IκB kinase (IKK), degradation of the inhibitory κB alpha (IκBα) and nuclear translocation of NF-κB can be attenuated by the pretreatment of P7C3 in microglia. Furthermore, in LPS-treated microglia, P7C3-pretreatment decreased the toxicity of conditioned media to MES23.5 cells (a dopaminergic (DA) cell line). Most importantly, the anti-inflammatory effects of P7C3 were observed in LPS-stimulated mouse model. In general, our study demonstrates that P7C3 inhibits LPS-induced microglial activation through repressing the NF-κB pathway both in vivo and in vitro, providing a theoretical basis for P7C3 in anti-inflammation.
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Affiliation(s)
- Chao Gu
- Laboratory of Molecular Neuropathology, Jiangsu Key laboratory of Translational Research and Therapy for Neuropsychiatric Disorders & Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Qingsong Hu
- Laboratory of Molecular Neuropathology, Jiangsu Key laboratory of Translational Research and Therapy for Neuropsychiatric Disorders & Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Jiayuan Wu
- The Key Laboratory, The Second Affiliated Hospital of Jiaxing University, Hangzhou, China
| | - Chenchen Mu
- Laboratory of Molecular Neuropathology, Jiangsu Key laboratory of Translational Research and Therapy for Neuropsychiatric Disorders & Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Haigang Ren
- Laboratory of Molecular Neuropathology, Jiangsu Key laboratory of Translational Research and Therapy for Neuropsychiatric Disorders & Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Chun-Feng Liu
- Institute of Neuroscience, Soochow University, Suzhou, China.,Department of Neurology and Suzhou Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Guanghui Wang
- Laboratory of Molecular Neuropathology, Jiangsu Key laboratory of Translational Research and Therapy for Neuropsychiatric Disorders & Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
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Novel tactics for neuroprotection in Parkinson's disease: Role of antibiotics, polyphenols and neuropeptides. Prog Neurobiol 2017; 155:120-148. [DOI: 10.1016/j.pneurobio.2015.10.004] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Revised: 10/08/2015] [Accepted: 10/26/2015] [Indexed: 02/04/2023]
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Liraz-Zaltsman S, Yaka R, Shabashov D, Shohami E, Biegon A. Neuroinflammation-Induced Memory Deficits Are Amenable to Treatment with D-Cycloserine. J Mol Neurosci 2016; 60:46-62. [PMID: 27421842 DOI: 10.1007/s12031-016-0786-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 06/21/2016] [Indexed: 12/18/2022]
Abstract
Cognitive deficits, especially memory loss, are common following many types of brain insults which are associated with neuroinflammation, although the underlying mechanisms are not entirely clear. The present study aimed to characterize the long-term cognitive and behavioral impairments in a mouse model of neuroinflammation in the absence of other insults and to evaluate the therapeutic potential of D-cycloserine (DCS). DCS is a co-agonist of the NMDA receptor that ameliorates cognitive deficits in models of TBI and stroke. Using a mouse model of global neuroinflammation induced by intracisternal (i.c.) administration of endotoxin (LPS), we found long-lasting microgliosis, memory deficits, impaired LTP, and reduced levels of the obligatory NR1 subunit of the NMDA receptor. A single administration of DCS, 1 day after i.c. LPS reduced microgliosis, reversed the cognitive deficits and restored LTP and NR1 levels. These results demonstrate that neuroinflammation alone, in the absence of trauma or ischemia, can cause persistent (>6 months) memory deficits linked to deranged NNMDA receptor function and suggest a possible role for NMDA co-agonists in reducing the cognitive sequelae of neuroinflammation.
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Affiliation(s)
- Sigal Liraz-Zaltsman
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat Gan, Israel.
- Department of Pharmacology, School of Pharmacy, Hebrew University, Jerusalem, Israel.
| | - Rami Yaka
- Department of Pharmacology, School of Pharmacy, Hebrew University, Jerusalem, Israel
| | - Dalia Shabashov
- Department of Pharmacology, School of Pharmacy, Hebrew University, Jerusalem, Israel
| | - Esther Shohami
- Department of Pharmacology, School of Pharmacy, Hebrew University, Jerusalem, Israel
| | - Anat Biegon
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat Gan, Israel
- Department of Neurology, Stony Brook University School of Medicine, Stony Brook, New York, USA
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Finlay C, Duty S. Therapeutic potential of targeting glutamate receptors in Parkinson's disease. J Neural Transm (Vienna) 2014; 121:861-80. [PMID: 24557498 DOI: 10.1007/s00702-014-1176-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 02/05/2014] [Indexed: 12/28/2022]
Abstract
Glutamate plays a complex role in many aspects of Parkinson's disease including the loss of dopaminergic neurons, the classical motor symptoms as well as associated non-motor symptoms and the treatment-related side effect, L-DOPA-induced dyskinesia. This widespread involvement opens up possibilities for glutamate-based therapies to provide a more rounded approach to treatment than is afforded by current dopamine replacement therapies. Beneficial effects of blocking postsynaptic glutamate transmission have already been noted in a range of preclinical studies using antagonists of NMDA receptors or negative allosteric modulators of metabotropic glutamate receptor 5 (mGlu5), while positive allosteric modulators of mGlu4 in particular, although at an earlier stage of investigation, also look promising. This review addresses each of the key features of Parkinson's disease in turn, summarising the contribution glutamate makes to that feature and presenting an up-to-date account of the potential for drugs acting at ionotropic or metabotropic glutamate receptors to provide relief. Whilst only a handful of these have progressed to clinical trials to date, notably NMDA and NR2B antagonists against motor symptoms and L-DOPA-induced dyskinesia, with mGlu5 negative allosteric modulators also against L-DOPA-induced dyskinesia, the mainly positive outcomes of these trials, coupled with supportive preclinical data for other strategies in animal models of Parkinson's disease and L-DOPA-induced dyskinesia, raise cautious optimism that a glutamate-based therapeutic approach will have significant impact on the treatment of Parkinson's disease.
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Affiliation(s)
- Clare Finlay
- Wolfson Centre for Age-Related Diseases, King's College London, WW1.28. Hodgkin Building, Guy's Campus, London, SE1 1UL, UK
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Novak A, Štefanič M, Grošelj U, Hrast M, Kasunič M, Gobec S, Stanovnik B, Svete J. A Simple Synthesis of Polyfunctionalized 4-Aminopyrazolidin-3-ones as ‘Aza-deoxa’ Analogs ofD-Cycloserine. Helv Chim Acta 2014. [DOI: 10.1002/hlca.201300169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Pseudoginsenoside-F11 (PF11) exerts anti-neuroinflammatory effects on LPS-activated microglial cells by inhibiting TLR4-mediated TAK1/IKK/NF-κB, MAPKs and Akt signaling pathways. Neuropharmacology 2014; 79:642-56. [PMID: 24467851 DOI: 10.1016/j.neuropharm.2014.01.022] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 01/10/2014] [Accepted: 01/13/2014] [Indexed: 02/07/2023]
Abstract
Pseudoginsenoside-F11 (PF11), an ocotillol-type ginsenoside, has been shown to possess significant neuroprotective activity. Since microglia-mediated inflammation is critical for induction of neurodegeneration, this study was designed to investigate the effect of PF11 on activated microglia. PF11 significantly suppressed the release of ROS and proinflammatory mediators induced by LPS in a microglial cell line N9 including NO, PGE2, IL-1β, IL-6 and TNF-α. Moreover, PF11 inhibited interaction and expression of TLR4 and MyD88 in LPS-activated N9 cells, resulting in an inhibition of the TAK1/IKK/NF-κB signaling pathway. PF11 also inhibited the phosphorylation of Akt and MAPKs induced by LPS in N9 cells. Importantly, PF11 significantly alleviated the death of SH-SY5Y neuroblastoma cells and primary cortical neurons induced by the conditioned-medium from activated microglia. At last, the effect of PF11 on neuroinflammation was confirmed in vivo: PF11 mitigated the microglial activation and proinflammatory factors expression obviously in both cortex and hippocampus in mice injected intrahippocampally with LPS. These findings indicate that PF11 exerts anti-neuroinflammatory effects on LPS-activated microglial cells by inhibiting TLR4-mediated TAK1/IKK/NF-κB, MAPKs and Akt signaling pathways, suggesting its therapeutic implication for neurodegenerative disease associated with neuroinflammation.
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