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Li L, Chen Q, Qin Y, Yu G, Qi T, Sui H, Qi X, Huang L. Regulation of TREM2 on BV2 inflammation through PI3K/AKT/mTOR pathway. Biotechnol Genet Eng Rev 2023:1-22. [PMID: 37125903 DOI: 10.1080/02648725.2023.2204719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
This work sought to determine how lipopolysaccharide (LPS)-induced pro-inflammatory factor production in BV2 microglia was influenced by myeloid cell 2 (TREM2) expressions. LPS (0.1, 1, and 10 µg/mL) induced inflammation in BV2 cells, MTT and QPCR were used to detect the occurrence of inflammation; TREM2 activation and inhibition vectors were used to activate and inhibit TREM2; Cell Proliferation was detected using CCK-8 and cell cloning experiments. LY294002 was used to inhibit the activity of PI3K/AKT signal pathway; Western blot and ELISA were used to detect cell polarization and signal pathway changes. CCK-8 and cell clone experiments found that the activation of TERM2 can promote the proliferation of BV2 cells; and the activation of TERM2 can promote the expression of IL6, IL1β, TNFα and the expression of M2 cell phenotype molecules Arg-1 and CD206. The effect of adding LY294002 signaling pathway by TERM2 activation was inhibited, indicating that TERM2 can affect the occurrence of inflammation by regulating the activity of PI3K/AKT signaling pathway. Finally, Western blotting and ELISA showed that activation of TERM2 can promote the expression of Arg-1 and CD206 in BV2 cells, and promote the transformation of BV2 cells to M2 polarization. TERM2 can affect the inflammatory response in microglia through the PI3K/AKT signaling pathway, suggesting that TERM2 may be a target for the treatment of inflammatory response in glial cells. This study provides a treatment plan for alleviating the impact of inflammation on central nervous system.
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Affiliation(s)
- Li Li
- Department of Neurology, the Third Affiliated Hospital of Qiqihar Medical College, Qiqihar, China
| | - Qingyou Chen
- Department of Electrical Biology, the Third Affiliated Hospital of Qiqihar Medical College, Qiqihar, China
| | - Yinghui Qin
- Department of Neurology, the Third Affiliated Hospital of Qiqihar Medical College, Qiqihar, China
| | - Guangna Yu
- Medical examination center, the Third Affiliated Hospital of Qiqihar Medical College, Qiqihar, China
| | - Tingting Qi
- Department of Neurology, the Third Affiliated Hospital of Qiqihar Medical College, Qiqihar, China
| | - Hesong Sui
- Department of Orthopedic surgery, Qiqihar Jianhua Hospital, Qiqihar, China
| | - Xin Qi
- Department of Neurology, the Third Affiliated Hospital of Qiqihar Medical College, Qiqihar, China
| | - Lijuan Huang
- Department of Neurology, the Third Affiliated Hospital of Qiqihar Medical College, Qiqihar, China
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Li X, Yin X, Pang J, Chen Z, Wen J. Hydrogen sulfide inhibits lipopolysaccharide-based neuroinflammation-induced astrocyte polarization after cerebral ischemia/reperfusion injury. Eur J Pharmacol 2023; 949:175743. [PMID: 37084816 DOI: 10.1016/j.ejphar.2023.175743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 04/23/2023]
Abstract
The effect of lipopolysaccharide (LPS)-based neuroinflammation following cerebral ischemia/reperfusion (I/R) on the genotypic transformation of reactive astrocytes and its relationship with endogenous hydrogen sulfide (H2S) were investigated in present study. We found that LPS promoted the cerebral I/R-induced A1 astrocytes proliferation in mouse hippocampal tissues and deteriorated the reduction of hydrogen sulfide (H2S) content in mouse sera, H2S donor NaHS could inhibitA1 astrocytes proliferation. Similarly, knockout of cystathionine γ-lyase (CSE), one of endogenous H2S synthases, likewise up-regulated the cerebral I/R-induced A1 astrocytes proliferation, which could also be blocked by NaHS. Besides, supplement with H2S promoted the A2 astrocytes proliferation in hippocampal tissues of CSE knockout (CSE KO) mice or LPS-treated mice following cerebral I/R. In the oxygen glucose deprivation/reoxygenation (OGD/R) model of astrocytes, H2S also promoted the transformation of astrocytes into A2 subtype. Moreover, we found that H2S could up-regulate the expression of α-subunit of large-conductance Ca2+-activated K+ (BKCa) channels in astrocytes, and the channel opener BMS-191011 likewise promoted the transformation of astrocyte into A2 subtype. In conclusion, H2S inhibits the proliferation of A1 astrocytes induced by LPS-based neuroinflammation following cerebral I/R and promotes the transformation of astrocytes into A2 subtype, which may be related to up-regulation of BKCa channels.
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Affiliation(s)
- Xueyan Li
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Xiaojiao Yin
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Jiazhuang Pang
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Zhiwu Chen
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.
| | - Jiyue Wen
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.
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53
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Liang X, Xue Z, Zheng Y, Li S, Zhou L, Cao L, Zou Y. Selenium supplementation enhanced the expression of selenoproteins in hippocampus and played a neuroprotective role in LPS-induced neuroinflammation. Int J Biol Macromol 2023; 234:123740. [PMID: 36806773 DOI: 10.1016/j.ijbiomac.2023.123740] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/30/2022] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
Selenium (Se) is obtained from organic and inorganic selenium food content, which mainly depends on the regional soil selenium content. Selenium deficiency and decreased selenoprotein functions have been shown to associate with the progression of cognitive decline and neurodegenerations including Alzheimer's disease (AD), Parkinson's disease (PD), and Huntington's disease (HD). Selenoproteins are well recognized for their anti-oxidative activities. Given the high oxygen consumption, mammalian brains preferent@ially supplied with Se. Here, we propose a beneficiary role for dietary supplementation of sodium selenite (300 ng per gram of body weight) in ameliorating neuroinflammation induced by bilateral intracerebroventricular injection of 1 μL LPS (1 μg/μL), evidenced by the significantly reduced oxidative stress, downregulated pro-inflammatory cytokines expression, improved integrity of blood-brain barrier, as well as suppressed glial activation and shifted microglial MI/M2 polarization in Se-sup mouse brain. Se intake also reduced neural cell death and significantly improved the cognition in Se-sup mice following LPS challenge. The neuroprotective role for supplementary Se is likely to be ascribed to the overall elevated expression of selenoproteins, especially Selenoprotein P (SELENOP) and Glutathione peroxidase 4 (GPX4), ranking on top of the change in selenoprotein expression hierarchy. The regional hierarchy of Se induced elevation of SELENOP expression was further characterized. The SELENOP expression in the mediodorsal thalamic nucleus, dendric gyrus (DG) and cornu ammonis 3 (CA3) of hippocampus and lateral habenular nucleus was highly sensitive to dietary Se intake.
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Affiliation(s)
- Xiaosheng Liang
- The Key Laboratory of Virology of Guangzhou, Jinan University, Guangzhou, China
| | - Zhuming Xue
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yangwu Zheng
- The Key Laboratory of Virology of Guangzhou, Jinan University, Guangzhou, China
| | - Shufang Li
- The Key Laboratory of Virology of Guangzhou, Jinan University, Guangzhou, China
| | - Lijun Zhou
- The Key Laboratory of Virology of Guangzhou, Jinan University, Guangzhou, China
| | - Lin Cao
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.
| | - Yi Zou
- The Key Laboratory of Virology of Guangzhou, Jinan University, Guangzhou, China.
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54
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Functional Two-Way Crosstalk Between Brain and Lung: The Brain-Lung Axis. Cell Mol Neurobiol 2023; 43:991-1003. [PMID: 35678887 PMCID: PMC9178545 DOI: 10.1007/s10571-022-01238-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/25/2022] [Indexed: 11/03/2022]
Abstract
The brain has many connections with various organs. Recent advances have demonstrated the existence of a bidirectional central nervous system (CNS) and intestinal tract, that is, the brain-gut axis. Although studies have suggested that the brain and lung can communicate with each other through many pathways, whether there is a brain-lung axis remains still unknown. Based on previous findings, we put forward a hypothesis: there is a cross-talk between the central nervous system and the lung via neuroanatomical pathway, endocrine pathway, immune pathway, metabolites and microorganism pathway, gas pathway, that is, the brain-lung axis. Beyond the regulation of the physiological state in the body, bi-directional communication between the lung and the brain is associated with a variety of disease states, including lung diseases and CNS diseases. Exploring the brain-lung axis not only helps us to understand the development of the disease from different aspects, but also provides an important target for treatment strategies.
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55
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Brier LM, Chen S, Sherafati A, Bice AR, Lee JM, Culver JP. Transient disruption of functional connectivity and depression of neural fluctuations in a mouse model of acute septic encephalopathy. Cereb Cortex 2023; 33:3548-3561. [PMID: 35972424 PMCID: PMC10068285 DOI: 10.1093/cercor/bhac291] [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: 01/03/2022] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 11/13/2022] Open
Abstract
Septic encephalopathy leads to major and costly burdens for a large percentage of admitted hospital patients. Elderly patients are at an increased risk, especially those with dementia. Current treatments are aimed at sedation to combat mental status changes and are not aimed at the underlying cause of encephalopathy. Indeed, the underlying pathology linking together peripheral infection and altered neural function has not been established, largely because good, acutely accessible readouts of encephalopathy in animal models do not exist. Behavioral testing in animals lasts multiple days, outlasting the time frame of acute encephalopathy. Here, we propose optical fluorescent imaging of neural functional connectivity (FC) as a readout of encephalopathy in a mouse model of acute sepsis. Imaging and basic behavioral assessment were performed at baseline, Hr8, Hr24, and Hr72 following injection of either lipopolysaccharide or phosphate buffered saline. Neural FC strength decreased at Hr8 and returned to baseline by Hr72 in motor, somatosensory, parietal, and visual cortical regions. Additionally, neural fluctuations transiently declined at Hr8 and returned to baseline by Hr72. Both FC strength and fluctuation tone correlated with neuroscore indicating this imaging methodology is a sensitive and acute readout of encephalopathy.
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Affiliation(s)
- L M Brier
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - S Chen
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - A Sherafati
- Department of Physics, Washington University School of Arts and Science, St. Louis, MO 63110, USA
| | - A R Bice
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - J M Lee
- Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - J P Culver
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
- Department of Physics, Washington University School of Arts and Science, St. Louis, MO 63110, USA
- Department of Biomedical Engineering, Washington University School of Engineering, St. Louis, MO 63110, USA
- Department of Electrical and Systems Engineering, Washington University School of Engineering, St. Louis, MO 63110, USA
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56
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Santibáñez A, Herrera-Ruiz M, González-Cortazar M, Nicasio-Torres P, Sharma A, Jiménez-Ferrer E. Dose-Effect Determination of a Neuroprotector Fraction Standardized in Coumarins of Tagetes lucida and Bioavailability. Pharmaceutics 2023; 15:967. [PMID: 36986828 PMCID: PMC10051064 DOI: 10.3390/pharmaceutics15030967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/08/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Neurodegeneration has been associated with chronic inflammation states in the brain. For this reason, attention has been directed to drugs indicated as anti-inflammatory as possible therapies for the treatment of said conditions. Tagetes lucida has been widely used as a folk remedy in illnesses associated with the central nervous system and inflammatory ailments. Among the compounds that stand out in the plant against these conditions are coumarins, such as 7-O-prenyl scopoletin, scoparone, dimethylfraxetin, herniarin, and 7-O-prenylumbelliferone. Therefore, the relationship between the therapeutic effect and the concentration was evaluated through pharmacokinetic and pharmacodynamic studies, including vascular permeability evaluation by blue Evans and pro- and anti-inflammatory cytokines quantification, under a neuroinflammation model induced by lipopolysaccharide by the oral administration of three different doses (5, 10, and 20 mg/kg) of a bioactive fraction of T. lucida. In the present study, it was found that all doses showed a neuroprotective and immunomodulatory effect, although the doses of 10 and 20 mg/kg were able to exert their effect for a longer time and to a greater extent. The protective effects of the fraction may be mainly associated with the DR, HR, and SC coumarins due to their structural profile and plasmatic and brain tissue bioavailability.
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Affiliation(s)
- Anislada Santibáñez
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Morelos, Mexico
- School of Engineering and Sciences, Tecnologico de Monterrey, Plant Innovation Lab, Av. Epigmenio González No. 500, San Pablo 76130, Queretaro, Mexico
| | - Maribel Herrera-Ruiz
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Morelos, Mexico
| | - Manasés González-Cortazar
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Morelos, Mexico
| | - Pilar Nicasio-Torres
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Morelos, Mexico
| | - Ashutosh Sharma
- School of Engineering and Sciences, Tecnologico de Monterrey, Plant Innovation Lab, Av. Epigmenio González No. 500, San Pablo 76130, Queretaro, Mexico
| | - Enrique Jiménez-Ferrer
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Morelos, Mexico
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Zhao T, Wang D, Wu D, Du J, Zhao M, Peng F, Zhang M, Zhou W, Hao A. Astilbin attenuates neonatal postnatal immune activation-induced long-lasting cognitive impairment in adult mice. J Funct Foods 2023. [DOI: 10.1016/j.jff.2023.105434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
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Reduced inhibitory and excitatory input onto parvalbumin interneurons mediated by perineuronal net might contribute to cognitive impairments in a mouse model of sepsis-associated encephalopathy. Neuropharmacology 2023; 225:109382. [PMID: 36543316 DOI: 10.1016/j.neuropharm.2022.109382] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/09/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022]
Abstract
Sepsis-associated encephalopathy (SAE) is commonly defined as diffuse brain dysfunction and can manifest as delirium to coma. Accumulating evidence has suggested that perineuronal net (PNN) plays an important role in the modulation of the synaptic plasticity of central nervous system. We here investigated the role of PNN in SAE induced by lipopolysaccharide (LPS) injection. Behavioral tests were performed by open field, Y-maze, and fear conditioning tests at the indicated time points. The densities of vesicular γ-aminobutyric acid transporter, vesicular glutamate transporter 1, PNN, and parvalbumin (PV) in the hippocampus were evaluated by immunofluorescence. Matrix metalloproteinases-9 (MMP-9) expression and its activity were detected by Western blot and gel zymography, respectively. Local field potential was recorded by in vivo electrophysiology. LPS-treated mice displayed significant cognitive impairments, coincided with activated MMP-9, decreased PNN and PV densities, reduced inhibitory and excitatory input onto PV interneurons enwrapped by PNN, and decreased gamma oscillations in hippocampal CA1. Notably, MMP-9 inhibitor SB-3CT treatment rescued most of these abnormalities. Taken together, our study demonstrates that active MMP-9 mediated PNN remodeling, leading to reduced inhibitory and excitatory input onto PV interneurons and abnormal gamma oscillations in hippocampal CA1, which consequently contributed to cognitive impairments after LPS injection.
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59
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Cui Z, Gong Y, Luo X, Zheng N, Tan S, Liu S, Li Y, Wang Q, Sun F, Hu M, Pan W, Yang X. β-Glucan alleviates goal-directed behavioral deficits in mice infected with Toxoplasma gondii. Parasit Vectors 2023; 16:65. [PMID: 36782332 PMCID: PMC9926625 DOI: 10.1186/s13071-023-05686-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 01/25/2023] [Indexed: 02/15/2023] Open
Abstract
BACKGROUND Toxoplasma gondii (T. gondii) is a neuroinvasive parasite causing neuroinflammation, which in turn is associated with a higher risk for several psycho-behavioral disorders. There is an urgent need to identify drugs capable of improving cognitive deficits induced by T. gondii infection. β-Glucan, an active ingredient in mushrooms, could significantly enhance immunity. However, the effects of β-glucan against neuroinflammation and cognitive decline induced by T. gondii infection remain unknown. The present study aimed to investigate the neuroprotective effect of β-glucan on goal-directed behavior of mice chronically infected by T. gondii Wh6 strain. METHODS A mice model of chronic T. gondii Wh6 infection was established by infecting mice by oral gavage with 10 cysts of T. gondii Wh6. Intraperitoneal injection of β-glucan was manipulated 2 weeks before T. gondii infection. Performance of the infected mice on the Y-maze test and temporal order memory (TOM) test was used to assess the goal-directed behavior. Golgi-Cox staining, transmission electron microscopy, immunofluorescence, real-time PCR and western blot assays were used to detect prefrontal cortex-associated pathological change and neuroinflammation. RESULTS The administration of β-glucan significantly prevented T. gondii Wh6-induced goal-directed behavioral impairment as assessed behaviorally by the Y-maze test and TOM test. In the prefrontal cortex, β-glucan was able to counter T. gondii Wh6-induced degeneration of neurites, impairment of synaptic ultrastructure and decrease of pre- and postsynaptic protein levels. Also, β-glucan significantly prevented the hyperactivation of pro-inflammatory microglia and astrocytes, as well as the upregulation of proinflammatory cytokines caused by chronic T. gondii Wh6 infection. CONCLUSIONS This study revealed that β-glucan prevents goal-directed behavioral impairment induced by chronic T. gondii infection in mice. These findings suggest that β-glucan may be an effective drug candidate to prevent T. gondii-associated psycho-behavioral disorders including goal-directed behavioral injury.
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Affiliation(s)
- Zeyu Cui
- grid.417303.20000 0000 9927 0537Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China ,grid.417303.20000 0000 9927 0537The Second Clinical Medical College, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Yuying Gong
- grid.417303.20000 0000 9927 0537Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Xiaotong Luo
- grid.417303.20000 0000 9927 0537Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China ,grid.417303.20000 0000 9927 0537The Second Clinical Medical College, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Niuyi Zheng
- grid.417303.20000 0000 9927 0537Department of Anatomy, Basic Medical College, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Shimin Tan
- grid.417303.20000 0000 9927 0537Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China ,grid.417303.20000 0000 9927 0537The Second Clinical Medical College, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Shuxi Liu
- grid.417303.20000 0000 9927 0537Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China ,grid.417303.20000 0000 9927 0537The First Clinical Medical College, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Youwei Li
- grid.417303.20000 0000 9927 0537Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China ,grid.417303.20000 0000 9927 0537The Second Clinical Medical College, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Qingling Wang
- grid.417303.20000 0000 9927 0537Department of Pathology, Basic Medical College, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Fenfen Sun
- grid.417303.20000 0000 9927 0537Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Minmin Hu
- grid.417303.20000 0000 9927 0537Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Wei Pan
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China.
| | - Xiaoying Yang
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China.
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Elhabak M, Salama AAA, Salama AH. Nose-to-brain delivery of galantamine loaded nanospray dried polyacrylic acid/taurodeoxycholate mixed matrix as a protective therapy in lipopolysaccharide-induced Alzheimer's in mice model. Int J Pharm 2023; 632:122588. [PMID: 36623740 DOI: 10.1016/j.ijpharm.2023.122588] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 01/02/2023] [Accepted: 01/04/2023] [Indexed: 01/09/2023]
Abstract
One of the promising drug delivery approaches is performed by nanosizing the administered drug product using the nanospray drying technique. In this study, a combination of several formulation factors was integrated and exploited to augment the bioavailability of galantamine hydrobromide (GAL) via the intranasal route. Nanosized polymeric particles were fabricated using the mucoadhesive polymer, polyacrylic acid (PAA), and the permeability booster, sodium taurodeoxycholate (TDC). First, a preliminary study was conducted to adjust the nanospray drying conditions. Then, formulations were prepared on the basis of a mixed factorial experimental design and further analyzed using Design Expert® software. Different responses were investigated: particle size, polydispersity index, spray rate, drying efficiency, and percent yield. The optimized formulation was further assessed for physical morphology using the scanning electron microscope, flowability, in vitro drug release, and in vivo brain cell uptake using confocal laser scanning microscopy. The promising formulation (F6), composed of equal ratio of PAA and TDC and 20 mg GAL, exhibited a particle size of 185.55 ± 4.3 nm, polydispersity index of 0.413 ± 0.02, and yield-value of 69.58 ± 5.82 %. It also displayed good flowability, complete drug release within 2 h, and enhanced in vivo fluorescent dye uptake and penetration in brain cells. The efficacy of the optimized formulation was examined using lipopolysaccharide-induced Alzheimer's in mice. Results revealed the advantageous influence of the optimized formulation (F6) through downregulation of NF-κβ, IL-1β and GFAP as well as upregulating TGF-1β in adult mice.
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Affiliation(s)
- Mona Elhabak
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ahram Canadian University, 6(th) of October City, Cairo, Egypt.
| | - Abeer A A Salama
- Pharmacology Department, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Alaa H Salama
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ahram Canadian University, 6(th) of October City, Cairo, Egypt; Pharmaceutical Technology Department, National Research Centre, Dokki, Cairo 12622, Egypt
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61
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Engler-Chiurazzi EB, Russell AE, Povroznik JM, McDonald KO, Porter KN, Wang DS, Hammock J, Billig BK, Felton CC, Yilmaz A, Schreurs BG, O'Callaghan JD, Zwezdaryk KJ, Simpkins JW. Intermittent systemic exposure to lipopolysaccharide-induced inflammation disrupts hippocampal long-term potentiation and impairs cognition in aging male mice. Brain Behav Immun 2023; 108:279-291. [PMID: 36549577 PMCID: PMC10019559 DOI: 10.1016/j.bbi.2022.12.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
Age-related cognitive decline, a common component of the brain aging process, is associated with significant impairment in daily functioning and quality of life among geriatric adults. While the complexity of mechanisms underlying cognitive aging are still being elucidated, microbial exposure and the multifactorial inflammatory cascades associated with systemic infections are emerging as potential drivers of neurological senescence. The negative cognitive and neurobiological consequences of a single pathogen-associated inflammatory experience, such as that modeled through treatment with lipopolysaccharide (LPS), are well documented. Yet, the brain aging impacts of repeated, intermittent inflammatory challenges are less well studied. To extend the emerging literature assessing the impact of infection burden on cognitive function among normally aging mice, here, we repeatedly exposed adult mice to intermittent LPS challenges during the aging period. Male 10-month-old C57BL6 mice were systemically administered escalating doses of LPS once every two weeks for 2.5 months. We evaluated cognitive consequences using the non-spatial step-through inhibitory avoidance task, and both spatial working and reference memory versions of the Morris water maze. We also probed several potential mechanisms, including cortical and hippocampal cytokine/chemokine gene expression, as well as hippocampal neuronal function via extracellular field potential recordings. Though there was limited evidence for an ongoing inflammatory state in cortex and hippocampus, we observed impaired learning and memory and a disruption of hippocampal long-term potentiation. These data suggest that a history of intermittent exposure to LPS-induced inflammation is associated with subtle but significantly impaired cognition among normally aging mice. The broader impact of these findings may have important implications for standard of care involving infections in aging individuals or populations at-risk for dementia.
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Affiliation(s)
- E B Engler-Chiurazzi
- Clinical Neuroscience Research Center, Department of Neurosurgery, Tulane Brain Institute, Tulane University, New Orleans, LA 70114, USA; Center for Basic and Translational Stroke Research, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA; Department of Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA.
| | - A E Russell
- Center for Basic and Translational Stroke Research, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA; Department of Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA; Department of Biology, School of Science, Penn State Erie, The Behrend College, Erie, PA 16563, USA; Magee Women's Research Institute, Allied Member, Pittsburgh, PA 15213, USA
| | - J M Povroznik
- Center for Basic and Translational Stroke Research, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA; Department of Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA
| | - K O McDonald
- Clinical Neuroscience Research Center, Department of Neurosurgery, Tulane Brain Institute, Tulane University, New Orleans, LA 70114, USA
| | - K N Porter
- Center for Basic and Translational Stroke Research, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA
| | - D S Wang
- Department of Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA
| | - J Hammock
- Center for Basic and Translational Stroke Research, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA
| | - B K Billig
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - C C Felton
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - A Yilmaz
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - B G Schreurs
- Department of Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA
| | - J D O'Callaghan
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - K J Zwezdaryk
- Department of Microbiology and Immunology, Tulane Brain Institute, Tulane University, New Orleans, LA 70114, USA
| | - J W Simpkins
- Center for Basic and Translational Stroke Research, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA; Department of Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26505, USA
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Inflammation and Treatment-Resistant Depression from Clinical to Animal Study: A Possible Link? Neurol Int 2023; 15:100-120. [PMID: 36648973 PMCID: PMC9844360 DOI: 10.3390/neurolint15010009] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/29/2022] [Accepted: 01/12/2023] [Indexed: 01/18/2023] Open
Abstract
The aim of this study was to investigate the relationship between treatment-resistant depression (TRD) and inflammation in humans and experimental models. For the human study, a retrospective cohort study was conducted with 206 participants; half were on antidepressants for major depressive disorder. The patients were divided into healthy and depressed groups. Inflammation was assessed based on the values of the main inflammatory biomarkers (CRP, WBC and ESR). For the animal experiments, 35 adult male Wistar rats were assigned to stressed and non-stressed groups. Inflammation and stress were induced using lipopolysaccharide and chronic unpredictable mild stress. A 10 mg/kg intraperitoneal injection of fluoxetine (FLX), a known antidepressant, was simultaneously administered daily for 4 weeks. Behavioral tests were performed. The plasma levels of inflammatory and stress biomarkers were measured and were significantly higher in the stressed and non-responsive groups in both studies. This study provides evidence of the link between inflammation and TRD. We further observed a possible link via the Phosphorylated Janus Kinase 2 and Phosphorylated Signal Transducer and Activator of Transcription 3 (P-JAK2/P-STAT3) signaling pathway and found that chronic stress and high inflammation hinder the antidepressant effects of FLX. Thus, non-response to antidepressants could be mitigated by treating inflammation to improve the antidepressant effect in patients with TRD.
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Kim JH, Ju IG, Kim N, Huh E, Son SR, Hong JP, Choi Y, Jang DS, Oh MS. Yomogin, Isolated from Artemisia iwayomogi, Inhibits Neuroinflammation Stimulated by Lipopolysaccharide via Regulating MAPK Pathway. Antioxidants (Basel) 2022; 12:antiox12010106. [PMID: 36670968 PMCID: PMC9854746 DOI: 10.3390/antiox12010106] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 12/26/2022] [Accepted: 12/30/2022] [Indexed: 01/04/2023] Open
Abstract
Neuroinflammation causes various neurological disorders, including depression and neurodegenerative diseases. Therefore, regulation of neuroinflammation is a promising therapeutic strategy for inflammation-related neurological disorders. This study aimed to investigate whether yomogin, isolated from Artemisia iwayomogi, has anti-neuroinflammatory effects. First, we evaluated the effects of yomogin by assessing pro-inflammatory mediators and cytokines in lipopolysaccharide (LPS)-stimulated BV2 microglial cells. The results showed that yomogin inhibited the increase in neuroinflammatory factors, including nitric oxide, inducible nitric oxide synthase, cyclooxygenase-2, interleukin-6, and tumor necrosis factor-α, and suppressed phosphorylation of c-Jun N-terminal kinase, extracellular signal-regulated kinase and p38, which participate in the mitogen-activated protein kinase (MAPK) pathway. To confirm these effects in vivo, we measured the activation of astrocyte and microglia in LPS-injected mouse brains. Results showed that yomogin treatment decreased astrocyte and microglia activations. Collectively, these results suggest that yomogin suppresses neuroinflammation by regulating the MAPK pathway and it could be a potential candidate for inflammation-mediated neurological diseases.
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Affiliation(s)
- Jin Hee Kim
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - In Gyoung Ju
- Department of Oriental Pharmaceutical Science, Kyung Hee East-West Pharmaceutical Research Institute, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Namkwon Kim
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Eugene Huh
- Department of Oriental Pharmaceutical Science, Kyung Hee East-West Pharmaceutical Research Institute, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - So-Ri Son
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Joon Pyo Hong
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Yujin Choi
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Dae Sik Jang
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
- Correspondence: (D.S.J.); (M.S.O.); Tel.: +82-2-961-0719 (D.S.J.); +82-2-961-9436 (M.S.O.)
| | - Myung Sook Oh
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
- Department of Oriental Pharmaceutical Science, Kyung Hee East-West Pharmaceutical Research Institute, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
- Correspondence: (D.S.J.); (M.S.O.); Tel.: +82-2-961-0719 (D.S.J.); +82-2-961-9436 (M.S.O.)
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Hydrogen Sulfide Attenuates Lipopolysaccharide-Induced Inflammation via the P-glycoprotein and NF-κB Pathway in Astrocytes. Neurochem Res 2022; 48:1424-1437. [PMID: 36482035 PMCID: PMC10066098 DOI: 10.1007/s11064-022-03840-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/13/2022] [Accepted: 11/29/2022] [Indexed: 12/13/2022]
Abstract
AbstractAstrocyte activation is key in neurodegenerative diseases. Hydrogen sulfide (H2S) exhibits neuroprotective effects on astrocytes, although the underlying molecular mechanism remains unclear. Here, we explored the effects of H2S on lipopolysaccharide (LPS)-induced astrocyte activation and astrocyte-mediated neuroinflammation. After inducing primary astrocytes via LPS exposure, H2S levels were altered. The generation and secretion of inflammatory mediators by astrocytes and their interrelation with P-glycoprotein (P-gp), an important transporter belonging to the ABC transporter family, were assessed. Activated astrocytes showed upregulated glial fibrillary acidic protein (GFAP) mRNA expression, and significantly increased proinflammatory factor mRNA/protein expression and release. The secretory capacity of astrocytes was reduced, with significantly decreased proinflammatory factor levels in culture supernatant after P-gp inhibitor verapamil pretreatment. The increase in the intracellular H2S level inhibited LPS-induced GFAP expression and P65 nuclear entry in astrocytes. mRNA expression and release of proinflammatory factors were reduced significantly, with no significant changes in cytoplasmic protein expression. S-sulfhydration levels increased significantly with the increased concentration of sodium hydrosulfide or S-adenosyl-l-methionine addition, with only moderate changes in astrocyte P-gp expression. H2S regulates NF-κB activation, leads to S-sulfhydration of P-gp, and inhibits the biosynthesis and secretion of proinflammatory factors by astrocytes. The regulatory effects of H2S on astrocytes may have clinical value for exploring new therapeutic strategies against neurodegenerative diseases.
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Lu C, Qu S, Zhong Z, Luo H, Lei SS, Zhong HJ, Su H, Wang Y, Chong CM. The effects of bioactive components from the rhizome of gastrodia elata blume (Tianma) on the characteristics of Parkinson's disease. Front Pharmacol 2022; 13:963327. [PMID: 36532787 PMCID: PMC9748092 DOI: 10.3389/fphar.2022.963327] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 11/07/2022] [Indexed: 08/04/2023] Open
Abstract
Parkinson's disease (PD) is an age-related chronic neurodegenerative disease caused by the death and degeneration of dopaminergic neurons in the substantia nigra of the midbrain. The decrease of the neurotransmitter dopamine in the patient's brain leads to various motor symptoms. PD drugs mainly enhance dopamine levels but cannot prevent or slow down the loss of dopaminergic neurons. In addition, they exhibit significant side effects and addiction issues during long-term use. Therefore, it is particularly urgent to develop novel drugs that have fewer side effects, can improve PD symptoms, and prevent the death of dopaminergic neurons. The rhizome of Gastrodia elata Blume (Tianma) is a well-known medicinal herb and has long been used as a treatment of nervous system-related diseases in China. Several clinical studies showed that formula comprising Tianma could be used as an add-on therapy for PD patients. Pharmacological studies indicated that Tianma and its bioactive components can reduce the death of dopaminergic neurons, α-synuclein accumulation, and neuroinflammation in various PD models. In this review, we briefly summarize studies regarding the effects of Tianma and its bioactive components' effects on major PD features and explore the potential use of Tianma components for the treatment of PD.
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Affiliation(s)
- Changcheng Lu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Shuhui Qu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Zhangfeng Zhong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Hua Luo
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Si San Lei
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Hai-Jing Zhong
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou, China
| | - Huanxing Su
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Yitao Wang
- Macau Centre for Research and Development in Chinese Medicine, State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao, China
| | - Cheong-Meng Chong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
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66
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Babaei F, Mirzababaei M, Dargahi L, Shahsavari Z, Nassiri-Asl M, Karima S. Preventive Effect of Saccharomyces boulardii on Memory Impairment Induced by Lipopolysaccharide in Rats. ACS Chem Neurosci 2022; 13:3180-3187. [PMID: 36318666 DOI: 10.1021/acschemneuro.2c00500] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Recent studies have indicated that dysfunction of gut microbiota, living microorganisms of the digestive tract, plays a role in the pathogenesis of neurodegenerative disorders, indicating the valuable impact of probiotics as a potential preventive or therapeutic strategy. Saccharomyces boulardii is a yeast probiotic with beneficial effects on various disorders, ranging from inflammatory gastrointestinal diseases to brain and behavioral disorders. Herein, we examined the effect of S. boulardii on memory impairment induced by lipopolysaccharide (LPS) in Wistar rats. Four groups of rats were used in this study (N = 10): (1) control [Cnt], (2) LPS, (3) LPS + S. boulardii [LPS + S], and (4) S. boulardii [S]. Animals were orally administered S. boulardii (250 mg/rat) or saline by gavage for 4 weeks. From the 14th day of the study, animals were administered intraperitoneal LPS (0.25 mg/kg/day) or saline for 9 days. We assessed memory impairment, neuroinflammation, and amyloid-β deposition. S. boulardii ameliorated LPS-induced memory dysfunction. We observed that S. boulardii significantly reduced the elevated levels of serum interleukin (IL)-1β, IL-6, and tumor necrosis factor-α, as well as hippocampal levels of NLRP3 and caspase-1 in the LPS model. Moreover, S. boulardii alleviated amyloid-β deposition in the rat hippocampus. Collectively, our findings indicated that S. boulardii could inhibit memory impairment, neuroinflammation, and amyloid-β accumulation induced by LPS, possibly by modifying the gut microbiota.
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Affiliation(s)
- Fatemeh Babaei
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 19839-63113, Iran
| | - Mohammadreza Mirzababaei
- Department of Clinical Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah 6715847141, Iran
| | - Leila Dargahi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran 19839-63113, Iran
| | - Zahra Shahsavari
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 19839-63113, Iran
| | - Marjan Nassiri-Asl
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 19839-63113, Iran.,Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran 19839-69364, Iran
| | - Saeed Karima
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 19839-63113, Iran
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Gynther M, Estrada ML, Loppi S, Korhonen P, Kanninen KM, Malm T, Koistinaho J, Auriola S, Fricker G, Puris E. Increased Expression and Activity of Brain Cortical cPLA2 Due to Chronic Lipopolysaccharide Administration in Mouse Model of Familial Alzheimer's Disease. Pharmaceutics 2022; 14:2438. [PMID: 36365256 PMCID: PMC9695895 DOI: 10.3390/pharmaceutics14112438] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 02/05/2024] Open
Abstract
Cytosolic phospholipase A2 (cPLA2) is an enzyme regulating membrane phospholipid homeostasis and the release of arachidonic acid utilized in inflammatory responses. It represents an attractive target for the treatment of Alzheimer's disease (AD). Previously, we showed that lipopolysaccharide (LPS)-induced systemic inflammation caused abnormal lipid metabolism in the brain of a transgenic AD mouse model (APdE9), which might be associated with potential changes in cPLA2 activity. Here, we investigated changes in cPLA2 expression and activity, as well as the molecular mechanisms underlying these alterations due to chronic LPS administration in the cerebral cortex of female APdE9 mice as compared to saline- and LPS-treated female wild-type mice and saline-treated APdE9 mice. The study revealed the significant effects of genotype LPS treatment on cortical cPLA2 protein expression and activity in APdE9 mice. LPS treatment resulted in nuclear factor kappa-light-chain-enhancer of activated B cells (NFkB) activation in the cortex of APdE9 mice. The gene expressions of inflammation markers Il1b and Tnfa were significantly elevated in the cortex of both APdE9 groups compared to the wild-type groups. The study provides evidence of the elevated expression and activity of cPLA2 in the brain cortex of APdE9 mice after chronic LPS treatment, which could be associated with NFkB activation.
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Affiliation(s)
- Mikko Gynther
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Im Neuenheimer Feld 329, 69120 Heidelberg, Germany
| | - Mariana Leal Estrada
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Im Neuenheimer Feld 329, 69120 Heidelberg, Germany
| | - Sanna Loppi
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
- Department of Immunobiology, University of Arizona, 1656 E Mabel Street, Tucson, AZ 85724-5221, USA
| | - Paula Korhonen
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
| | - Katja M. Kanninen
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
| | - Tarja Malm
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
| | - Jari Koistinaho
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
- Neuroscience Center, Helsinki Institute for Life Science, University of Helsinki, Haartmaninkatu 8, 00290 Helsinki, Finland
| | - Seppo Auriola
- School of Pharmacy, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
| | - Gert Fricker
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Im Neuenheimer Feld 329, 69120 Heidelberg, Germany
| | - Elena Puris
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Im Neuenheimer Feld 329, 69120 Heidelberg, Germany
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Kim J, Jeon SG, Jeong HR, Park H, Kim JI, Hoe HS. L-Type Ca 2+ Channel Inhibition Rescues the LPS-Induced Neuroinflammatory Response and Impairments in Spatial Memory and Dendritic Spine Formation. Int J Mol Sci 2022; 23:13606. [PMID: 36362394 PMCID: PMC9655622 DOI: 10.3390/ijms232113606] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/26/2022] [Accepted: 11/03/2022] [Indexed: 08/11/2023] Open
Abstract
Ca2+ signaling is implicated in the transition between microglial surveillance and activation. Several L-type Ca2+ channel blockers (CCBs) have been shown to ameliorate neuroinflammation by modulating microglial activity. In this study, we examined the effects of the L-type CCB felodipine on LPS-mediated proinflammatory responses. We found that felodipine treatment significantly diminished LPS-evoked proinflammatory cytokine levels in BV2 microglial cells in an L-type Ca2+ channel-dependent manner. In addition, felodipine leads to the inhibition of TLR4/AKT/STAT3 signaling in BV2 microglial cells. We further examined the effects of felodipine on LPS-stimulated neuroinflammation in vivo and found that daily administration (3 or 7 days, i.p.) significantly reduced LPS-mediated gliosis and COX-2 and IL-1β levels in C57BL/6 (wild-type) mice. Moreover, felodipine administration significantly reduced chronic neuroinflammation-induced spatial memory impairment, dendritic spine number, and microgliosis in C57BL/6 mice. Taken together, our results suggest that the L-type CCB felodipine could be repurposed for the treatment of neuroinflammation/cognitive function-associated diseases.
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Affiliation(s)
- Jieun Kim
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61, Cheomdan-ro, Dong-gu, Daegu 41062, Korea
| | - Seong Gak Jeon
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61, Cheomdan-ro, Dong-gu, Daegu 41062, Korea
| | - Ha-Ram Jeong
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61, Cheomdan-ro, Dong-gu, Daegu 41062, Korea
| | - HyunHee Park
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61, Cheomdan-ro, Dong-gu, Daegu 41062, Korea
| | - Jae-Ick Kim
- Department of Biological Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
| | - Hyang-Sook Hoe
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61, Cheomdan-ro, Dong-gu, Daegu 41062, Korea
- Department of Brain and Cognitive Science, Daegu Gyeongbuk Institute of Science & Technology (DGIST), 333, Techno Jungang-Daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988, Korea
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69
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Yang G, Liu Y, Liu Y, Ma Y, Li Y, Chen J. Integrating network pharmacology and an experimental validation strategy elucidates the protective effect and mechanism of callicarpa nudiflora against neuroinflammation. RSC Adv 2022; 12:31124-31141. [PMID: 36349022 PMCID: PMC9620778 DOI: 10.1039/d2ra05143e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/20/2022] [Indexed: 11/25/2022] Open
Abstract
Abnormal activation of microglia promotes neuroinflammation (NI) in Alzheimer's disease (AD). Callicarpa nudiflora Hook et Arn. (CN) is a traditional Chinese herb with a wide range of clinical applications and definite anti-inflammatory effects. However, the anti-inflammatory action and mechanism of NI are not known. The purpose of this research was to survey whether CN could inhibit lipopolysaccharide (LPS)-induced inflammatory activation in BV-2 microglia. This study used a network pharmacology and pharmacophore model-based approach to explore the molecular mechanism of CN anti-NI by combining molecular docking and experimental validation. First, we screened the key active components and targets of CN anti-NI by network pharmacology. Then, the common structural features of these functional molecules in the treatment of neuroinflammation were predicted by 3D-QSAR pharmacodynamic modeling. Finally, the molecular mechanism of the active ingredient 5-hydroxy-3,7,4'-trimethoxyflavone (THF) against neuroinflammation was validated by molecular docking and in vitro experiments. In conclusion, this study established the structure-activity relationships of the active components of CN anti-NI and provided new insights into the pharmacological mechanisms of CN anti-NI at an integrative level.
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Affiliation(s)
- Guodong Yang
- School of Pharmacy, Jiangxi University of Chinese Medicine Nanchang 330004 China
| | - Yufu Liu
- School of Pharmacy, Jiangxi University of Chinese Medicine Nanchang 330004 China
| | - Yonglin Liu
- School of Pharmacy, Jiangxi University of Chinese Medicine Nanchang 330004 China
| | - Yu Ma
- School of Pharmacy, Jiangxi University of Chinese Medicine Nanchang 330004 China
| | - Yiguang Li
- Scientific Research Center, Jiangzhong Pharmaceutical Co. Ltd Nanchang 330004 China
| | - Jie Chen
- School of Pharmacy, Jiangxi University of Chinese Medicine Nanchang 330004 China
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Santibáñez A, Herrera-Ruiz M, González-Cortazar M, Nicasio-Torres P, Sharma A, Jiménez-Ferrer E. Pharmacokinetics and Tissue Distribution of Coumarins from Tagetes lucida in an LPS-Induced Neuroinflammation Model. PLANTS (BASEL, SWITZERLAND) 2022; 11:2805. [PMID: 36365258 PMCID: PMC9656319 DOI: 10.3390/plants11212805] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
Tagetes lucida has been widely used as a folk remedy in illnesses associated with the central nervous system and inflammatory ailments. Among the chemical compounds that stand out in the plant against these conditions are coumarins, such as 7-O-prenylscopoletin (PE), scoparone (SC), dimethylfraxetin (DF), herniarin (HR), and 7-O-prenylumbelliferone (PU), considered potential anti-neuroinflammatory compounds. Therefore, the relationship between the therapeutic effect and the dose can be evaluated through pharmacokinetic-pharmacodynamic (PK-PD) studies under a model of neuroinflammation induced by lipopolysaccharide (LPS). Nonetheless, accomplishing those studies requires an accurate and robust analytical method for the detection of these compounds in different biological matrices of interest. Due to the above, in the present study, a bioanalytical method was established by HPLC-DAD-UV for the simultaneous quantification of the coumarins present in the hexane extract of T. lucida, which was able to determine the temporal concentration profiles of each of the coumarins in the plasma, brain, kidney, and spleen samples of healthy and damaged mice. Coumarins showed an increase in plasma concentrations of up to three times in the neuroinflammation model, compared to healthy mice, so it was possible to quantify the therapeutic agents in the main target organ, the brain. The ability of compounds to cross the blood-brain barrier is an advantage in the treatment of diseases associated with neuroinflammation processes that can be studied in future PK-PD evaluations.
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Affiliation(s)
- Anislada Santibáñez
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Mexico
- School of Engineering and Sciences, Tecnologico de Monterrey, Av. Epigmenio González No. 500, San Pablo, Queretaro 76130, Mexico
| | - Maribel Herrera-Ruiz
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Mexico
| | - Manasés González-Cortazar
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Mexico
| | - Pilar Nicasio-Torres
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Mexico
| | - Ashutosh Sharma
- School of Engineering and Sciences, Tecnologico de Monterrey, Av. Epigmenio González No. 500, San Pablo, Queretaro 76130, Mexico
| | - Enrique Jiménez-Ferrer
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1 Col Centro, Xochitepec 62790, Mexico
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Khodaei S, Wang DS, Ariza A, Syed RM, Orser BA. The Impact of Inflammation and General Anesthesia on Memory and Executive Function in Mice. Anesth Analg 2022; 136:999-1011. [PMID: 36469752 DOI: 10.1213/ane.0000000000006221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Perioperative neurocognitive disorders (PNDs) are complex, multifactorial conditions that are associated with poor long-term outcomes. Inflammation and exposure to general anesthetic drugs are likely contributing factors; however, the relative impact of each factor alone versus the combination of these factors remains poorly understood. The goal of this study was to compare the relative impact of inflammation, general anesthesia, and the combination of both factors on memory and executive function. METHODS To induce neuroinflammation at the time of exposure to an anesthetic drug, adult male mice were treated with lipopolysaccharide (LPS) or vehicle. One day later, they were anesthetized with etomidate (or vehicle). Levels of proinflammatory cytokines were measured in the hippocampus and cortex 24 hours after LPS treatment. Recognition memory and executive function were assessed starting 24 hours after anesthesia using the novel object recognition assay and the puzzle box, respectively. Data are expressed as mean (or median) differences (95% confidence interval). RESULTS LPS induced neuroinflammation, as indicated by elevated levels of proinflammatory cytokines, including interleukin-1β (LPS versus control, hippocampus: 3.49 pg/mg [2.06-4.92], P < .001; cortex: 2.60 pg/mg [0.83-4.40], P = .010) and tumor necrosis factor-α (hippocampus: 3.50 pg/mg [0.83-11.82], P = .002; cortex: 2.38 pg/mg [0.44-4.31], P = .021). Recognition memory was impaired in mice treated with LPS, as evinced by a lack of preference for the novel object (novel versus familiar: 1.03 seconds [-1.25 to 3.30], P = .689), but not in mice treated with etomidate alone (novel versus familiar: 2.38 seconds [0.15-4.60], P = .031). Mice cotreated with both LPS and etomidate also exhibited memory deficits (novel versus familiar: 1.40 seconds [-0.83 to 3.62], P = .383). In the puzzle box, mice treated with either LPS or etomidate alone showed no deficits. However, the combination of LPS and etomidate caused deficits in problem-solving tasks (door open task: -0.21 seconds [-0.40 to -0.01], P = .037; plug task: -0.30 seconds [-0.50 to -0.10], P < .001; log values versus control), indicating impaired executive function. CONCLUSIONS Impairments in recognition memory were driven by inflammation. Deficits in executive function were only observed in mice cotreated with LPS and etomidate. Thus, an interplay between inflammation and etomidate anesthesia led to cognitive deficits that were not observed with either factor alone. These findings suggest that inflammation and anesthetic drugs may interact synergistically, or their combination may unmask covert or latent deficits induced by each factor alone, leading to PNDs.
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Lai W, Huang J, Fang W, Deng S, Xie Y, Wang W, Qiao T, Xu G, Wang X, Ding F. Optic nerve head: A gatekeeper for vitreous infectious insults? Front Immunol 2022; 13:987771. [PMID: 36203577 PMCID: PMC9531234 DOI: 10.3389/fimmu.2022.987771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 08/31/2022] [Indexed: 11/19/2022] Open
Abstract
The axons of retinal ganglion cells (RGCs) pass through the optic nerve head (ONH) and form the optic nerve (ON). The ONH serves as an anatomical interface between the vitreous cavity and subarachnoid space. After inducing acute neuroinflammation by intravitreal injection of lipopolysaccharides (LPS), we observed inflammatory activation in the retina, but detect no signs of inflammation in the posterior ON or infiltration of inflammatory cells in the ONH. Therefore, we hypothesized that the ONH functions as a barrier to vitreous inflammation. Using transmission electron microscopy, we identified significant increase in G-ratio in the posterior ON on day 7 post intravitreal injection (PII) of LPS compared with the phosphate buffered saline (PBS) group. Moreover, using confocal imaging of ex vivo tissue extracted from Aldh1L1-eGFP reporter mice, we observed that the ONH astrocytes altered their spatial orientation by elongating their morphology along the axonal axis of RGCs in LPS- versus PBS-treated eyes; this was quantified by the ratio of longitudinal (DL) and transverse (DT) diameter of astrocytes and the proportion of longitudinally locating astrocytes. Supportive evidences were further provided by transmission electron microscopic imaging in rat ONH. We further conducted RNA sequencing of ONH on day 1 PII and found LPS induced clear upregulation of immune and inflammatory pathways. Furthermore, gene set enrichment analysis revealed that astrocyte and microglia contributed prominently to the transcriptomic alterations in ONH. Here, we report that the vitreous infectious insults induce morphological changes of ONH astrocytes and transcriptomic alterations in the ONH. Glial responses in the ONH may defend against vitreous infectious insults and serve as a barrier to inflammation for the central nervous system.
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Affiliation(s)
- Wenwen Lai
- Department of Pharmacology, School of Basic Medical Sciences; Shanghai Key Laboratory of Visual Impairment and Restoration, Science and Technology Commission of Shanghai Municipality, Fudan University, Shanghai, China
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jie Huang
- Department of Pharmacology, School of Basic Medical Sciences; Shanghai Key Laboratory of Visual Impairment and Restoration, Science and Technology Commission of Shanghai Municipality, Fudan University, Shanghai, China
- Department of Ophthalmology, Eye, Ear, Nose and Throat Hospital; State Key Laboratory of Medical Neurobiology and Ministry of Education Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China
| | - Wangyi Fang
- Department of Ophthalmology, Shanghai Children’s Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Saiyue Deng
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Xie
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Wang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tong Qiao
- Department of Ophthalmology, Shanghai Children’s Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Gezhi Xu
- Department of Pharmacology, School of Basic Medical Sciences; Shanghai Key Laboratory of Visual Impairment and Restoration, Science and Technology Commission of Shanghai Municipality, Fudan University, Shanghai, China
- Department of Ophthalmology, Eye, Ear, Nose and Throat Hospital; State Key Laboratory of Medical Neurobiology and Ministry of Education Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China
| | - Xiaowei Wang
- Department of Ophthalmology, University of California San Francisco, San Francisco, CA, United States
- *Correspondence: Fengfei Ding, ; Xiaowei Wang,
| | - Fengfei Ding
- Department of Pharmacology, School of Basic Medical Sciences; Shanghai Key Laboratory of Visual Impairment and Restoration, Science and Technology Commission of Shanghai Municipality, Fudan University, Shanghai, China
- Department of Ophthalmology, Eye, Ear, Nose and Throat Hospital; State Key Laboratory of Medical Neurobiology and Ministry of Education Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China
- *Correspondence: Fengfei Ding, ; Xiaowei Wang,
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Ren Z, Ding H, Zhou M, Chan P. Ganoderma lucidum Modulates Inflammatory Responses following 1-Methyl-4-Phenyl-1,2,3,6-Tetrahydropyridine (MPTP) Administration in Mice. Nutrients 2022; 14:nu14183872. [PMID: 36145248 PMCID: PMC9505693 DOI: 10.3390/nu14183872] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/07/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
Ganoderma lucidum, one of the most valued medicinal mushrooms, has been used for health supplements and medicine in China. Our previous studies have proved that Ganoderma lucidum extract (GLE) could inhibit activation of microglia and protect dopaminergic neurons in vitro. In the present study, we investigated the anti-neuroinflammatory potential of GLE in vivo on Parkinsonian-like pathological dysfunction. Male C57BL/6J mice were subjected to acute 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) lesion, and a treatment group was administered intragastrically with GLE at a dose of 400 mg/kg. Immunohistochemistry staining showed that GLE efficiently repressed MPTP-induced microglia activation in nigrostriatal region. Accordingly, Bio-plex multiple cytokine assay indicated that GLE treatment modulates abnormal cytokine expression levels. In microglia BV-2 cells incubated with LPS, increased expression of iNOS and NLRP3 were effectively inhibited by 800 μg/mL GLE. Furthermore, GLE treatment decreased the expression of LC3II/I, and further enhanced the expression of P62. These results indicated that the neuroprotection of GLE in an experimental model of PD was partially related to inhibition of microglia activation in vivo and vitro, possibly through downregulating the iNOS/NLRP3 pathway, inhibiting abnormal microglial autophagy and lysosomal degradation, which provides new evidence for Ganoderma lucidum in PD treatment.
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Affiliation(s)
- Zhili Ren
- National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
- Correspondence: ; Tel.: +86-10-83188677
| | - Hui Ding
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Ming Zhou
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Piu Chan
- National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
- Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100053, China
- Clinical Center for Parkinson’s Disease, Capital Medical University, Key Laboratory for Neurodegenerative Disease of the Ministry of Education, Beijing Key Laboratory for Parkinson’s Disease, Beijing 100053, China
- Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing 100053, China
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Effects of Genistein on Common Kidney Diseases. Nutrients 2022; 14:nu14183768. [PMID: 36145144 PMCID: PMC9506319 DOI: 10.3390/nu14183768] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/06/2022] [Accepted: 09/06/2022] [Indexed: 12/16/2022] Open
Abstract
Genistein is a naturally occurring phytoestrogen (soy or soybean products) that is classified as an isoflavone, and its structure is similar to that of endogenous estrogens; therefore, genistein can exert an estrogen-like effect via estrogen receptors. Additionally, genistein is a tyrosine kinase inhibitor, which enables it to block abnormal cell growth and proliferation signals through the inhibition of tyrosine kinase. Genistein is also an angiogenesis inhibitor and an antioxidant. Genistein has effects on kidney cells, some of the kidney’s physiological functions, and a variety of kidney diseases. First, genistein exerts a protective effect on normal cells by reducing the inflammatory response, inhibiting apoptosis, inhibiting oxidative stress, inhibiting remodeling, etc., but after cell injury, the protective effect of genistein decreases or even has the opposite effect. Second, genistein can regulate renin intake to maintain blood pressure balance, regulate calcium uptake to regulate Ca2+ and Pi balances, and reduce vasodilation to promote diuresis. Third, genistein has beneficial effects on a variety of kidney diseases (including acute kidney disease, kidney cancer, and different chronic kidney diseases), such as reducing symptoms, delaying disease progression, and improving prognosis. Therefore, this paper reviews animal and human studies on the protective effects of genistein on the kidney in vivo and in vitro to provide a reference for clinical research in the future.
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Nie YY, Zhou LJ, Li YM, Yang WC, Liu YY, Yang ZY, Ma XX, Zhang YP, Hong PZ, Zhang Y. Hizikia fusiforme functional oil (HFFO) prevents neuroinflammation and memory deficits evoked by lipopolysaccharide/aluminum trichloride in zebrafish. Front Aging Neurosci 2022; 14:941994. [PMID: 36158548 PMCID: PMC9500236 DOI: 10.3389/fnagi.2022.941994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 08/05/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundOxidative stress, cholinergic deficiency, and neuroinflammation are hallmarks of most neurodegenerative disorders (NDs). Lipids play an important role in brain development and proper functioning. Marine-derived lipids have shown good memory-improving potentials, especially those from fish and microalgae. The cultivated macroalga Hizikia fusiforme is healthy food and shows benefits to memory, but the study is rare on the brain healthy value of its oil. Previously, we had reported that the Hizikia fusiforme functional oil (HFFO) contains arachidonic acid, 11,14,17-eicosatrienoic acid, phytol, and other molecules displaying in vitro acetylcholinesterase inhibitory and nitroxide scavenging activity; however, the in vivo effect remains unclear. In this study, we further investigated its potential effects against lipopolysaccharides (LPS)- or aluminum trichloride (AlCl3)-induced memory deficiency in zebrafish and its drug-related properties in silica.MethodsWe established memory deficit models in zebrafish by intraperitoneal (i.p.) injection of lipopolysaccharides (LPS) (75 ng) or aluminum trichloride (AlCl3) (21 μg), and assessed their behaviors in the T-maze test. The interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), acetylcholine (ACh), and malondialdehyde (MDA) levels were measured 24 h after the LPS/AlCl3 injection as markers of inflammation, cholinergic activity, and oxidative stress. Furthermore, the interaction of two main components, 11,14,17-eicosatrienoic acid and phytol, was investigated by molecular docking, with the important anti-inflammatory targets nuclear factor kappa B (NF-κB) and cyclooxygenase 2 (COX-2). Specifically, the absorption, distribution, metabolism, excretion, and toxicity (ADMET) and drug-likeness properties of HFFO were studied by ADMETlab.ResultsThe results showed that HFFO reduced cognitive deficits in zebrafish T-maze induced by LPS/AlCl3. While the LPS/AlCl3 treatment increased MDA content, lowered ACh levels in the zebrafish brain, and elevated levels of central and peripheral proinflammatory cytokines, these effects were reversed by 100 mg/kg HFFO except for MDA. Moreover, 11,14,17-eicosatrienoic acid and phytol showed a good affinity with NF-κB, COX-2, and HFFO exhibited acceptable drug-likeness and ADMET profiles in general.ConclusionCollectively, this study's findings suggest HFFO as a potent neuroprotectant, potentially valuable for the prevention of memory impairment caused by cholinergic deficiency and neuroinflammation.
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Affiliation(s)
- Ying-Ying Nie
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China
| | - Long-Jian Zhou
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China
| | - Yan-Mei Li
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
| | - Wen-Cong Yang
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
| | - Ya-Yue Liu
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China
| | - Zhi-You Yang
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
| | - Xiao-Xiang Ma
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
| | - Yong-Ping Zhang
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
| | - Peng-Zhi Hong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China
| | - Yi Zhang
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Shenzhen Institute of Guangdong Ocean University, Zhanjiang Municipal Key Laboratory of Marine Drugs and Nutrition for Brain Health, Research Institute for Marine Drugs and Nutrition, College of Food Science and Technology, Guangdong Ocean University, Zhanjian, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China
- *Correspondence: Yi Zhang ;
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Agnew-Svoboda W, Ubina T, Figueroa Z, Wong YC, Vizcarra EA, Roebini B, Wilson EH, Fiacco TA, Riccomagno MM. A genetic tool for the longitudinal study of a subset of post-inflammatory reactive astrocytes. CELL REPORTS METHODS 2022; 2:100276. [PMID: 36046623 PMCID: PMC9421582 DOI: 10.1016/j.crmeth.2022.100276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 06/01/2022] [Accepted: 07/22/2022] [Indexed: 11/29/2022]
Abstract
Astrocytes are vital support cells that ensure proper brain function. In brain disease, astrocytes reprogram into a reactive state that alters many of their cellular roles. A long-standing question in the field is whether downregulation of reactive astrocyte (RA) markers during resolution of inflammation is because these astrocytes revert back to a non-reactive state or die and are replaced. This has proven difficult to answer mainly because existing genetic tools cannot distinguish between healthy versus RAs. Here we describe the generation of an inducible genetic tool that can be used to specifically target and label a subset of RAs. Longitudinal analysis of an acute inflammation model using this tool revealed that the previously observed downregulation of RA markers after inflammation is likely due to changes in gene expression and not because of cell death. Our findings suggest that cellular changes associated with astrogliosis after acute inflammation are largely reversible.
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Affiliation(s)
- William Agnew-Svoboda
- Neuroscience Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Teresa Ubina
- Neuroscience Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Zoe Figueroa
- Neuroscience Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
- Division of Biomedical Sciences, University of California, Riverside, Riverside, CA 92521, USA
| | - Yiu-Cheung Wong
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Edward A. Vizcarra
- Division of Biomedical Sciences, University of California, Riverside, Riverside, CA 92521, USA
- Biomedical Sciences Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
| | - Bryan Roebini
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Emma H. Wilson
- Neuroscience Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
- Division of Biomedical Sciences, University of California, Riverside, Riverside, CA 92521, USA
- Biomedical Sciences Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
| | - Todd A. Fiacco
- Neuroscience Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
- Biomedical Sciences Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
| | - Martin M. Riccomagno
- Neuroscience Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
- Biomedical Sciences Graduate Program, University of California, Riverside, Riverside, CA 92521, USA
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Ma X, Li X, Wang W, Zhang M, Yang B, Miao Z. Phosphatidylserine, inflammation, and central nervous system diseases. Front Aging Neurosci 2022; 14:975176. [PMID: 35992593 PMCID: PMC9382310 DOI: 10.3389/fnagi.2022.975176] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 07/15/2022] [Indexed: 11/13/2022] Open
Abstract
Phosphatidylserine (PS) is an anionic phospholipid in the eukaryotic membrane and is abundant in the brain. Accumulated studies have revealed that PS is involved in the multiple functions of the brain, such as activation of membrane signaling pathways, neuroinflammation, neurotransmission, and synaptic refinement. Those functions of PS are related to central nervous system (CNS) diseases. In this review, we discuss the metabolism of PS, the anti-inflammation function of PS in the brain; the alterations of PS in different CNS diseases, and the possibility of PS to serve as a therapeutic agent for diseases. Clinical studies have showed that PS has no side effects and is well tolerated. Therefore, PS and PS liposome could be a promising supplementation for these neurodegenerative and neurodevelopmental diseases.
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Affiliation(s)
- Xiaohua Ma
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Xiaojing Li
- Suzhou Science and Technology Town Hospital, Suzhou, China
| | - Wenjuan Wang
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Meng Zhang
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Bo Yang
- Department of Anesthesiology, The Second Affiliated Hospital of Soochow University, Suzhou, China
- *Correspondence: Bo Yang,
| | - Zhigang Miao
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Neuroscience, Soochow University, Suzhou, China
- Zhigang Miao,
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Go J, Park HY, Lee DW, Maeng SY, Lee IB, Seo YJ, An JP, Oh WK, Lee CH, Kim KS. Humulus japonicus attenuates LPS-and scopolamine-induced cognitive impairment in mice. Lab Anim Res 2022; 38:21. [PMID: 35854340 PMCID: PMC9297604 DOI: 10.1186/s42826-022-00134-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 07/13/2022] [Indexed: 11/30/2022] Open
Abstract
Background Neuroinflammation plays an important role in cognitive decline and memory impairment in neurodegenerative disorders. Previously, we demonstrated that Humulus japonicus (HJ) has anti-inflammatory effects in rodent models of Alzheimer’s disease and Parkinson’s disease. The present study aimed to examine the protective potential of HJ extracts against lipopolysaccharide (LPS)-induced cognitive impairment and scopolamine-induced amnesia in mouse models. Cognitive improvement of mice was investigated by novel object recognition test. For analyzing effects on neuroinflammation, immunohistochemistry and quantitative real-time polymerase chain reaction (qRT-PCR) assays were performed. Results We found that the oral administration of HJ significantly improved cognitive dysfunction induced by LPS in a novel object recognition test. The LPS-induced activation of microglia was notably decreased by HJ treatment in the cortex and hippocampus. HJ administration with LPS also significantly increased the mRNA expression of interleukin (IL)-10 and decreased the mRNA expression of IL-12 in the parietal cortex of mice. The increased expression of LPS-induced complement C1q B chain (C1bq) and triggering receptor expressed on myeloid cells 2 (Trem2) genes was significantly suppressed by HJ treatment. In addition, HJ administration significantly improved novel object recognition in a scopolamine-induced amnesia mouse model. Conclusions These findings revealed that HJ has a beneficial effect on cognitive impairment and neuroinflammation induced by systemic inflammation and on amnesia induced by scopolamine in mice.
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Affiliation(s)
- Jun Go
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Gwahak-ro 125, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hye-Yeon Park
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Gwahak-ro 125, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Da Woon Lee
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Gwahak-ro 125, Yuseong-gu, Daejeon, 34141, Republic of Korea.,Department of Biomaterials Science, College of Natural Resources and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang, 50463, Republic of Korea
| | - So-Young Maeng
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Gwahak-ro 125, Yuseong-gu, Daejeon, 34141, Republic of Korea.,College of Biosciences and Biotechnology, Chung-Nam National University, Daejeon, 34134, Republic of Korea
| | - In-Bok Lee
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Gwahak-ro 125, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Yun Jeong Seo
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Gwahak-ro 125, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jin-Pyo An
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences College of Pharmacy, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Won Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences College of Pharmacy, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Chul-Ho Lee
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Gwahak-ro 125, Yuseong-gu, Daejeon, 34141, Republic of Korea. .,Department of Functional Genomics, University of Science and Technology, Daejeon, 34113, Republic of Korea.
| | - Kyoung-Shim Kim
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Gwahak-ro 125, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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Hobin K, Costas-Rodríguez M, Van Wonterghem E, Vandenbroucke RE, Vanhaecke F. High-Precision Isotopic Analysis of Cu and Fe via Multi-Collector Inductively Coupled Plasma-Mass Spectrometry Reveals Lipopolysaccharide-Induced Inflammatory Effects in Blood Plasma and Brain Tissues. Front Chem 2022; 10:896279. [PMID: 35783204 PMCID: PMC9241339 DOI: 10.3389/fchem.2022.896279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 05/09/2022] [Indexed: 11/13/2022] Open
Abstract
The concentration and the isotopic composition of the redox-active essential elements Cu and Fe were investigated in blood plasma and specific brain regions (hippocampus, cortex, brain stem and cerebellum) of mice to assess potential alterations associated with sepsis-associated encephalopathy induced by lipopolysaccharide (LPS) administration. Samples were collected from young (16-22 weeks) and aged (44-65 weeks) mice after intraperitoneal injection of the LPS, an endotoxin inducing neuroinflammation, and from age- and sex-matched controls, injected with phosphate-buffered saline solution. Sector-field single-collector inductively coupled plasma-mass spectrometry was relied upon for elemental analysis and multi-collector inductively coupled plasma-mass spectrometry for isotopic analysis. Significant variations were observed for the Cu concentration and for the Cu and Fe isotope ratios in the blood plasma. Concentrations and isotope ratios of Cu and Fe also varied across the brain tissues. An age- and an inflammatory-related effect was found affecting the isotopic compositions of blood plasma Cu and cerebellum Fe, whereas a regional Cu isotopic redistribution was found within the brain tissues. These findings demonstrate that isotopic analysis of essential mineral elements picks up metabolic changes not revealed by element quantification, making the two approaches complementary.
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Affiliation(s)
- Kasper Hobin
- Atomic and Mass Spectrometry - A&MS Research Unit, Department of Chemistry, Ghent University, Ghent, Belgium
| | - Marta Costas-Rodríguez
- Atomic and Mass Spectrometry - A&MS Research Unit, Department of Chemistry, Ghent University, Ghent, Belgium
| | - Elien Van Wonterghem
- Barriers in Inflammation Lab, VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Roosmarijn E Vandenbroucke
- Barriers in Inflammation Lab, VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Frank Vanhaecke
- Atomic and Mass Spectrometry - A&MS Research Unit, Department of Chemistry, Ghent University, Ghent, Belgium
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80
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Su Y, Liu Y, He D, Hu G, Wang H, Ye B, He Y, Gao X, Liu D. Hordenine inhibits neuroinflammation and exerts neuroprotective effects via inhibiting NF-κB and MAPK signaling pathways in vivo and in vitro. Int Immunopharmacol 2022; 108:108694. [DOI: 10.1016/j.intimp.2022.108694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 02/28/2022] [Accepted: 03/08/2022] [Indexed: 12/30/2022]
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81
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Effects of Compounds Isolated from Lindera erythrocarpa on Anti-Inflammatory and Anti-Neuroinflammatory Action in BV2 Microglia and RAW264.7 Macrophage. Int J Mol Sci 2022; 23:ijms23137122. [PMID: 35806130 PMCID: PMC9267112 DOI: 10.3390/ijms23137122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/17/2022] [Accepted: 06/22/2022] [Indexed: 02/05/2023] Open
Abstract
Lindera erythrocarpa contains various constituents such as cyclopentenedione-, flavonoid-, and chalcone-type components. In this study, a novel bi-linderone derivative and 17 known compounds were isolated from the leaves of L. erythrocarpa by using various chromatographic methods. The structures of the components were determined from nuclear magnetic resonance and mass spectrometry data. All isolated compounds were tested for anti-inflammatory and anti-neuroinflammatory activities in lipopolysaccharide (LPS)-induced BV2 and RAW264.7 cells. Some of these compounds showed anti-inflammatory effects by inhibiting the nitric oxide (NO) produced by LPS. In particular, linderaspirone A (16), bi-linderone (17) and novel compound demethoxy-bi-linderone (18) showed significant inhibitory effects on the production of prostaglandin E2 (PGE2), tumor necrosis factor-α, and interleukin-6. The three compounds also inhibited the expression of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2), which are pro-inflammatory proteins, and the activation of nuclear factor κB (NF-κB). Therefore, linderaspirone A (16), bi-linderone (17), and demethoxy-bi-linderone (18) isolated from the leaves of L. erythrocarpa have therapeutic potential in neuroinflammatory diseases.
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82
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Corydecumine G inhibits microglia activation via MAPK pathway in a rat model of neuropathic pain. J Chem Neuroanat 2022; 124:102124. [PMID: 35752418 DOI: 10.1016/j.jchemneu.2022.102124] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 06/20/2022] [Accepted: 06/21/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND AND PURPOSE Microglial activation plays an important role in the onset and progression of neuropathic pain by producing a variety of pro-inflammatory cytokines that interact with neurons to enhance neuronal hyperexcitability. Corydalis decumbens (Thunb.) pers., a traditional Chinese medicine has been used to treat mild cancer pain, dementia and to remit cerebral ischemia in clinics. Phenylphthalide isoquinolines are the major type of metabolites of C. decumbens and one of the derivatives, Corydecumine G (Cor G) has been shown to inhibit neuronal excitability. The present study aims to investigate the analgesic efficacy of Cor G in neuropathic pain rat model, the effects of Cor G on microglia activation and the possible mechanisms. EXPERIMENTAL APPROACH Neuropathic pain was modeled using chronic constriction sciatic nerve injury (CCI) in rats. Western blot, immunofluorescence, and qRT-PCR were used to evaluate the levels of protein and mRNA. KEY RESULTS Intraperitoneal administration of Cor G concentration-dependently ameliorates mechanical and thermo allodynia, suppresses CCI-induced p38/ERK phosphorylation and spinal cord microglia activation, and attenuates the expression levels of NO, inos, Tnf-α, Pge2 in dorsal horn of L4-L6 spinal cord on the ligation side in CCI rats. Pretreatment with 30 μM Cor G decreased LPS-induced BV2 microglia activation, which occurred via the inos, Tnf-α, Il-1β, Il-6 and phospho-p38/ERK pathways. CONCLUSIONS AND IMPLICATIONS Taken together, we suggest that Cor G, the specific phthalide isoquinoline from traditional Chinese medicine Corydalis Decumbentis Rhizoma, may be promising for treatment of neuropathic pain.
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83
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Wu H, Qiu W, Zhu X, Li X, Xie Z, Carreras I, Dedeoglu A, Van Dyke T, Han YW, Karimbux N, Tu Q, Cheng L, Chen J. The Periodontal Pathogen Fusobacterium nucleatum Exacerbates Alzheimer's Pathogenesis via Specific Pathways. Front Aging Neurosci 2022; 14:912709. [PMID: 35813949 PMCID: PMC9260256 DOI: 10.3389/fnagi.2022.912709] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 06/07/2022] [Indexed: 01/21/2023] Open
Abstract
Alzheimer's Disease (AD) is the most common form of dementia in older adults and has a devastating impact on the patient's quality of life, which creates a significant socio-economic burden for the affected individuals and their families. In recent years, studies have identified a relationship between periodontitis and AD. Periodontitis is an infectious/inflammatory disease that destroys the supporting periodontal structure leading to tooth loss. Dysbiosis of the oral microbiome plays a significant role in the onset and development of periodontitis exhibiting a shift to overgrowth of pathobionts in the normal microflora with increasing local inflammation. Fusobacterium nucleatum is a common pathogen that significantly overgrows in periodontitis and has also been linked to various systemic diseases. Earlier studies have reported that antibodies to F. nucleatum can be detected in the serum of patients with AD or cognitive impairment, but a causal relationship and a plausible mechanism linking the two diseases have not been identified. In this study, we conducted both in vivo and in vitro experiments and found that F. nucleatum activates microglial cells causing morphological changes, accelerated proliferation and enhanced expression of TNF-α and IL-1β in microglial cells. In our in vivo experiments, we found that F. nucleatum-induced periodontitis resulted in the exacerbation of Alzheimer's symptoms in 5XFAD mice including increased cognitive impairment, beta-amyloid accumulation and Tau protein phosphorylation in the mouse cerebrum. This study may suggest a possible link between a periodontal pathogen and AD and F. nucleatum could be a risk factor in the pathogenesis of AD. We are currently further identifying the pathways through which F. nucleatum modulates molecular elements in enhancing AD symptoms and signs. Data are available via ProteomeXchange with identifier PXD033147.
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Affiliation(s)
- Hongle Wu
- Department of Endodontics, Stomatological Hospital, Southern Medical University, Guangzhou, China,State Key Laboratory of Oral Disease, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China,Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA, United States
| | - Wei Qiu
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaofang Zhu
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA, United States,Department of Periodontology, Tufts University School of Dental Medicine, Boston, MA, United States
| | - Xiangfen Li
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China
| | - Zhongcong Xie
- Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, United States
| | - Isabel Carreras
- Department of Veterans Affairs, VA Boston Healthcare System, Boston, MA, United States,Department of Neurology and Department of Biochemistry School of Medicine, Boston University, Boston, MA, United States
| | - Alpaslan Dedeoglu
- Department of Veterans Affairs, VA Boston Healthcare System, Boston, MA, United States,Department of Neurology School of Medicine, Boston University, Boston, MA, United States
| | - Thomas Van Dyke
- The Forsyth Institute, Clinical and Translational Research, Cambridge, MA, United States,Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, MA, United States
| | - Yiping W. Han
- Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, University Irvign Medical Center, New York, NY, United States,Department of Microbiology & Immunology, Vagelos College of Physicians & Surgeons, Columbia University Irvign Medical Center, New York, NY, United States
| | - Nadeem Karimbux
- Department of Periodontology, Tufts University School of Dental Medicine, Boston, MA, United States
| | - Qisheng Tu
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA, United States,Department of Periodontology, Tufts University School of Dental Medicine, Boston, MA, United States
| | - Lei Cheng
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China,*Correspondence: Lei Cheng,
| | - Jake Chen
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA, United States,Department of Periodontology, Tufts University School of Dental Medicine, Boston, MA, United States,Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, United States,Graduate School of Biomedical Sciences, Tufts University, Boston, MA, United States,Jake Chen,
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84
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Laminin as a Biomarker of Blood-Brain Barrier Disruption under Neuroinflammation: A Systematic Review. Int J Mol Sci 2022; 23:ijms23126788. [PMID: 35743229 PMCID: PMC9224176 DOI: 10.3390/ijms23126788] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/03/2022] [Accepted: 06/10/2022] [Indexed: 01/01/2023] Open
Abstract
Laminin, a non-collagenous glycoprotein present in the brain extracellular matrix, helps to maintain blood–brain barrier (BBB) integrity and regulation. Neuroinflammation can compromise laminin structure and function, increasing BBB permeability. The aim of this paper is to determine if neuroinflammation-induced laminin functional changes may serve as a potential biomarker of alterations in the BBB. The 38 publications included evaluated neuroinflammation, BBB disruption, and laminin, and were assessed for quality and risk of bias (protocol registered in PROSPERO; CRD42020212547). We found that laminin may be a good indicator of BBB overall structural integrity, although changes in expression are dependent on the pathologic or experimental model used. In ischemic stroke, permanent vascular damage correlates with increased laminin expression (β and γ subunits), while transient damage correlates with reduced laminin expression (α subunits). Laminin was reduced in traumatic brain injury and cerebral hemorrhage studies but increased in multiple sclerosis and status epilepticus studies. Despite these observations, there is limited knowledge about the role played by different subunits or isoforms (such as 411 or 511) of laminin in maintaining structural architecture of the BBB under neuroinflammation. Further studies may clarify this aspect and the possibility of using laminin as a biomarker in different pathologies, which have alterations in BBB function in common.
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85
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Gan YL, Wang CY, He RH, Hsu PC, Yeh HH, Hsieh TH, Lin HC, Cheng MY, Jeng CJ, Huang MC, Lee YH. FKBP51 mediates resilience to inflammation-induced anxiety through regulation of glutamic acid decarboxylase 65 expression in mouse hippocampus. J Neuroinflammation 2022; 19:152. [PMID: 35705957 PMCID: PMC9198626 DOI: 10.1186/s12974-022-02517-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 06/05/2022] [Indexed: 12/28/2022] Open
Abstract
Background Inflammation is a potential risk factor of mental disturbance. FKBP5 that encodes FK506-binding protein 51 (FKBP51), a negative cochaperone of glucocorticoid receptor (GR), is a stress-inducible gene and has been linked to psychiatric disorders. Yet, the role of FKBP51 in the inflammatory stress-associated mental disturbance remained unclear. Methods Fkbp5-deficient (Fkbp5-KO) mice were used to study inflammatory stress by a single intraperitoneal injection of lipopolysaccharide (LPS). The anxiety-like behaviors, neuroimaging, immunofluorescence staining, immunohistochemistry, protein and mRNA expression analysis of inflammation- and neurotransmission-related mediators were evaluated. A dexamethasone drinking model was also applied to examine the effect of Fkbp5-KO in glucocorticoid-induced stress. Results LPS administration induced FKBP51 elevation in the liver and hippocampus accompanied with transient sickness. Notably, Fkbp5-KO but not wild-type (WT) mice showed anxiety-like behaviors 7 days after LPS injection (LPS-D7). LPS challenge rapidly increased peripheral and central immune responses and hippocampal microglial activation followed by a delayed GR upregulation on LPS-D7, and these effects were attenuated in Fkbp5-KO mice. Whole-brain [18F]-FEPPA neuroimaging, which target translocator protein (TSPO) to indicate neuroinflammation, showed that Fkbp5-KO reduced LPS-induced neuroinflammation in various brain regions including hippocampus. Interestingly, LPS elevated glutamic acid decarboxylase 65 (GAD65), the membrane-associated GABA-synthesizing enzyme, in the hippocampus of WT but not Fkbp5-KO mice on LPS-D7. This FKBP51-dependent GAD65 upregulation was observed in the ventral hippocampal CA1 accompanied by the reduction of c-Fos-indicated neuronal activity, whereas both GAD65 and neuronal activity were reduced in dorsal CA1 in a FKBP51-independent manner. GC-induced anxiety was also examined, which was attenuated in Fkbp5-KO and hippocampal GAD65 expression was unaffected. Conclusions These results suggest that FKBP51/FKBP5 is involved in the systemic inflammation-induced neuroinflammation and hippocampal GR activation, which may contribute to the enhancement of GAD65 expression for GABA synthesis in the ventral hippocampus, thereby facilitating resilience to inflammation-induced anxiety. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-022-02517-8.
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Affiliation(s)
- Yu-Ling Gan
- Department and Institute of Physiology, College of Medicine, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Chen-Yu Wang
- Department and Institute of Physiology, College of Medicine, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Rong-Heng He
- Department and Institute of Physiology, College of Medicine, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Pei-Chien Hsu
- Department and Institute of Physiology, College of Medicine, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Hsin-Hsien Yeh
- Brain Research Center, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Tsung-Han Hsieh
- Department and Institute of Physiology, College of Medicine, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Hui-Ching Lin
- Department and Institute of Physiology, College of Medicine, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Ming-Yen Cheng
- Department of Mathematics, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tsai, Hong Kong, China
| | - Chung-Jiuan Jeng
- Brain Research Center, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan.,Department and Institute of Anatomy and Cell Biology, College of Medicine, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Ming-Chyi Huang
- Department of Psychiatry, Taipei City Psychiatric Center, Taipei City Hospital, 309 Song-De Street, Taipei, 110, Taiwan. .,Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, 250 Wu-Xing Street, Taipei, 110, Taiwan. .,Psychiatric Research Center, Taipei Medical University Hospital, 252 Wu-Xing Street,, Taipei, 110, Taiwan.
| | - Yi-Hsuan Lee
- Department and Institute of Physiology, College of Medicine, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan. .,Brain Research Center, National Yang Ming Chiao Tung University, 155 Sec. 2, Linong Street, Taipei, 112, Taiwan.
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86
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Poe AJ, Shah R, Khare D, Kulkarni M, Phan H, Ghiam S, Punj V, Ljubimov AV, Saghizadeh M. Regulatory role of miR-146a in corneal epithelial wound healing via its inflammatory targets in human diabetic cornea. Ocul Surf 2022; 25:92-100. [PMID: 35690236 DOI: 10.1016/j.jtos.2022.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 06/03/2022] [Accepted: 06/06/2022] [Indexed: 12/11/2022]
Abstract
PURPOSE MiR-146a upregulated in limbus vs. central cornea and in diabetic vs. non-diabetic limbus has emerged as an important immune and inflammatory signaling mediator in corneal epithelial wound healing. Our aim was to investigate the potential inflammation-related miR-146a target genes and their roles in normal and impaired diabetic corneal epithelial wound healing. METHODS Our previous data from RNA-seq combined with quantitative proteomics of limbal epithelial cells (LECs) transfected with miR-146a mimic vs. mimic control were analyzed. Western blot and immunostaining were used to confirm the expression of miR-146a inflammatory target proteins in LECs and organ-cultured corneas. Luminex assay was performed on conditioned media at 6- and 20-h post-wounding in miR-146a mimic/inhibitor transfected normal and diabetic cultured LECs. RESULTS Overexpression of miR-146a decreased the expression of pro-inflammatory TRAF6 and IRAK1 and downstream target NF-κB after challenge with lipopolysaccharide (LPS) or wounding. Additionally, miR-146a overexpression suppressed the production of downstream inflammatory mediators including secreted cytokines IL-1α, IL-1β, IL-6 and IL-8, and chemokines CXCL1, CXCL2 and CXCL5. These cytokines and chemokines were upregulated in normal but not in diabetic LEC during wounding. Furthermore, we achieved normalized levels of altered secreted cytokines and chemokines in diabetic wounded LEC via specific inhibition of miR-146a. CONCLUSION Our study documented significant impact of miR-146a on the expression of inflammatory mediators at the mRNA and protein levels during acute inflammatory responses and wound healing, providing insights into the regulatory role of miR-146a in corneal epithelial homeostasis in normal and diabetic conditions.
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Affiliation(s)
- Adam J Poe
- Eye Program, Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Ruchi Shah
- Eye Program, Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Drirh Khare
- Eye Program, Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Mangesh Kulkarni
- Eye Program, Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Hong Phan
- Eye Program, Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Sean Ghiam
- Eye Program, Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Vasu Punj
- Department of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Alexander V Ljubimov
- Eye Program, Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Mehrnoosh Saghizadeh
- Eye Program, Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
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87
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Neuroprotective Effect of Bcl-2 on Lipopolysaccharide-Induced Neuroinflammation in Cortical Neural Stem Cells. Int J Mol Sci 2022; 23:ijms23126399. [PMID: 35742844 PMCID: PMC9223771 DOI: 10.3390/ijms23126399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 11/17/2022] Open
Abstract
Neuroinflammation is involved in the pathogenesis of neurodegenerative diseases due to increased levels of pro-inflammatory cytokines in the central nervous system (CNS). Chronic neuroinflammation induced by neurotoxic molecules accelerates neuronal damage. B-cell lymphoma 2 (Bcl-2) is generally accepted to be an important anti-apoptotic factor. However, the role of Bcl-2 in neuroprotection against neuroinflammation remains to be determined. The purpose of this study was to investigate the neuroprotective effect of Bcl-2 on lipopolysaccharide (LPS)-induced neuroinflammation in cortical neural stem cells (NSCs). LPS decreased mRNA and protein levels of Tuj-1, a neuron marker, and also suppressed neurite outgrowth, indicating that LPS results in inhibition of neuronal differentiation of NSCs. Furthermore, LPS treatment inhibited Bcl-2 expression during neuronal differentiation; inhibition of neuronal differentiation by LPS was rescued by Bcl-2 overexpression. LPS-induced pro-inflammatory cytokines, including interleukin (IL)-6 and tumor necrosis factor alpha (TNF-α), were decreased by Bcl-2 overexpression. Conversely, Bcl-2 siRNA increased the LPS-induced levels of IL-6 and TNF-α, and decreased neuronal differentiation of NSCs, raising the possibility that Bcl-2 mediates neuronal differentiation by inhibiting the LPS-induced inflammatory response in NSC. These results suggest that Bcl-2 has a neuroprotective effect by inhibiting the LPS-induced inflammatory response in NSCs.
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88
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Puris E, Jalkanen A, Auriola S, Loppi S, Korhonen P, Kanninen KM, Malm T, Koistinaho J, Gynther M. Systemic inflammation elevates cytosolic prolyl oligopeptidase protein expression but not peptidase activity in the cerebral cortices of familial Alzheimer`s disease modeling mice. BRAIN DISORDERS 2022. [DOI: 10.1016/j.dscb.2022.100035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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89
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Clark A, Zelmanovich R, Vo Q, Martinez M, Nwafor DC, Lucke-Wold B. Inflammation and the role of infection: Complications and treatment options following neurotrauma. J Clin Neurosci 2022; 100:23-32. [PMID: 35381478 DOI: 10.1016/j.jocn.2022.03.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 02/14/2022] [Accepted: 03/29/2022] [Indexed: 02/08/2023]
Abstract
Traumatic brain injury can have devastating consequences for patients and extended hospital stays and recovery course. Recent data indicate that the initial insult causes profound changes to the immune system and leads to a pro-inflammatory state. This alteration in homeostasis predisposes patients to an increased risk of infection and underlying autoimmune conditions. Increased emphasis has been placed on understanding this process both in the clinical and preclinical literature. This review highlights the intrinsic inflammatory conditions that can occur within the initial hospital stay, discusses long-term immune consequences, highlights emerging treatment options, and delves into important pathways currently being investigated with preclinical models.
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Affiliation(s)
- Alec Clark
- University of Central Florida, College of Medicine, Orlando, USA
| | | | - Quan Vo
- Department of Neurosurgery, University of Florida, Gainesville, USA
| | - Melanie Martinez
- Department of Neurosurgery, University of Florida, Gainesville, USA
| | - Divine C Nwafor
- Department of Neurosurgery, West Virginia University, Morgantown, USA
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90
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Puris E, Kouřil Š, Najdekr L, Auriola S, Loppi S, Korhonen P, Gómez-Budia M, Fricker G, Kanninen KM, Malm T, Friedecký D, Gynther M. Metabolomic, lipidomic and proteomic characterisation of lipopolysaccharide-induced inflammation mouse model. Neuroscience 2022; 496:165-178. [DOI: 10.1016/j.neuroscience.2022.05.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 05/20/2022] [Accepted: 05/23/2022] [Indexed: 11/28/2022]
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91
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Identification of Potential Anti-Neuroinflammatory Inhibitors from Antarctic Fungal Strain Aspergillus sp. SF-7402 via Regulating the NF-κB Signaling Pathway in Microglia. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27092851. [PMID: 35566201 PMCID: PMC9103959 DOI: 10.3390/molecules27092851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/21/2022] [Accepted: 04/27/2022] [Indexed: 11/17/2022]
Abstract
Microglia play a significant role in immune defense and tissue repair in the central nervous system (CNS). Microglial activation and the resulting neuroinflammation play a key role in the pathogenesis of neurodegenerative disorders. Recently, inflammation reduction strategies in neurodegenerative diseases have attracted increasing attention. Herein, we discovered and evaluated the anti-neuroinflammatory potential of compounds from the Antarctic fungi strain Aspergillus sp. SF-7402 in lipopolysaccharide (LPS)-stimulated BV2 cells. Four metabolites were isolated from the fungi through chemical investigations, namely, 5-methoxysterigmatocystin (1), sterigmatocystin (2), aversin (3), and 6,8-O-dimethylversicolorin A (4). Their chemical structures were elucidated by extensive spectroscopic analysis and HR-ESI-MS, as well as by comparison with those reported in literature. Anti-neuroinflammatory effects of the isolated metabolites were evaluated by measuring the production of nitric oxide (NO), tumor necrosis factor (TNF)-α, and interleukin (IL)-6 in LPS-activated microglia at non-cytotoxic concentrations. Sterigmatocystins (1 and 2) displayed significant effects on NO production and mild effects on TNF-α and IL-6 expression inhibition. The molecular mechanisms underlying this activity were investigated using Western blot analysis. Sterigmatocystin treatment inhibited NO production via downregulation of inducible nitric oxide synthase (iNOS) expression in LPS-stimulated BV2 cells. Additionally, sterigmatocystins reduced nuclear translocation of NF-κB. These results suggest that sterigmatocystins present in the fungal strain Aspergillus sp. are promising candidates for the treatment of neuroinflammatory diseases.
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92
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Zhou J, Ni W, Ling Y, Lv X, Niu D, Zeng Y, Qiu Y, Si Y, Wang Z, Hu J. Human neural stem cells secretome inhibits lipopolysaccharide-induced neuroinflammation through modulating microglia polarization by activating PPAR-γ. Stem Cells Dev 2022; 31:369-382. [PMID: 35481777 DOI: 10.1089/scd.2022.0081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Neuroinflammation is one of the typical events in multiple neurodegenerative diseases, whereas microglia are the critical participants in the pathogenesis of neuroinflammation. Several studies suggest that neural stem cells (NSCs) present immunomodulatory benefits due to their paracrine products, which contain mounting trophic factors. In the current study, the anti-inflammatory effects of neural stem cells secretome (NSC-S) on lipopolysaccharide (LPS)-induced neuroinflammatory models were evaluated in vivo and the underlying mechanism was further investigated in vitro. It was revealed that NSC-S significantly attenuated the severity of LPS-induced behaviour disorders and inflammatory response in mice. In vitro studies found that NSC-S significantly promoted the polarization of microglia from proinflammatory M1 to anti-inflammatory M2 phenotype, and reduced the production of proinflammatory cytokines while elevated anti-inflammatory cytokines in BV2 cells. NSC-S promoted peroxisome proliferator-activated receptor gamma (PPAR-γ) pathway activation. However, these effects of NSC-S were abrogated by PPAR-γ inhibitor GW9662. Notably, the fatty acid binding protein 5 (FABP5) in NSC-S may mediate PPAR-γ activation and inflammation remission. In summary, NSC-S promotes the regression of LPS-induced microglia-mediated inflammation through the PPAR-γ pathway. This function might be achieved via FABP5.
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Affiliation(s)
- Jiqin Zhou
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, , Jiangsu, China;
| | - Wei Ni
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, , Jiangsu, China;
| | - Yating Ling
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, , Jiangsu, China;
| | - Xiaorui Lv
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, , Jiangsu, China;
| | - Dongdong Niu
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, , Jiangsu, China;
| | - Yu Zeng
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, , Jiangsu, China;
| | - Yun Qiu
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, , Jiangsu, China;
| | - Yu Si
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, , Jiangsu, China;
| | - Ziyu Wang
- Health Clinical Laboratories, Health BioMed Co.,Ltd, Ningbo, Zhejiang, China;
| | - Jiabo Hu
- Jinagsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, 301, , Jiangsu, China, 212013;
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93
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Lee HJ, Park JH, Hoe HS. Idebenone Regulates Aβ and LPS-Induced Neurogliosis and Cognitive Function Through Inhibition of NLRP3 Inflammasome/IL-1β Axis Activation. Front Immunol 2022; 13:749336. [PMID: 35222363 PMCID: PMC8866241 DOI: 10.3389/fimmu.2022.749336] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 01/07/2022] [Indexed: 11/16/2022] Open
Abstract
Idebenone is an analogue of coenzyme Q10, an electron donor in the mitochondrial electron transport chain, and thus may function as an antioxidant to facilitate mitochondrial function. However, whether idebenone modulates LPS- and Aβ-mediated neuroinflammatory responses and cognitive function in vivo is unknown. The present study explored the effects of idebenone on LPS- or Aβ-mediated neuroinflammation, learning and memory and the underlying molecular mechanisms in wild-type (WT) mice and 5xFAD mice, a mouse model of Alzheimer’s disease (AD). In male and female WT mice, idebenone upregulated neuroprotective NRF2 expression, rescued LPS-induced spatial and recognition memory impairments, and reduced NLRP3 priming and subsequent neuroinflammation. Moreover, idebenone downregulated LPS-mediated neurogliosis, reactive oxygen species (ROS) levels, and mitochondrial function in BV2 microglial cells and primary astrocytes by inhibiting NLRP3 inflammasome activation. In 5xFAD mice, idebenone increased neuroprotective NRF2 expression and improved amyloid beta (Aβ)-induced cognitive dysfunction. Idebenone downregulated Aβ-mediated gliosis and proinflammatory cytokine levels in 5xFAD mice by modulating the vicious NLRP3/caspase-1/IL-1β neuroinflammation cycle. Taken together, our results suggest that idebenone targets neuroglial NLRP3 inflammasome activation and therefore may have neuroprotective effects and inhibit the pathological progression of neuroinflammation-related diseases.
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Affiliation(s)
- Hyun-Ju Lee
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), Daegu, South Korea
| | - Jin-Hee Park
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), Daegu, South Korea
| | - Hyang-Sook Hoe
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), Daegu, South Korea.,Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology, Daegu, South Korea
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94
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Heman-Bozadas P, Romero C, Martínez-Remedios P, Freitag I, Frías A, Saavedra-López E, Casanova P, Roig-Martínez M, Cribaro G, Rovirosa-Hernández M, Hernández-Baltazar D, Barcia C. Lesion-associated microglia and macrophages mediate corralling and react with massive phagocytosis for debris clearance and wound healing after LPS-induced dopaminergic depletion. J Neuroimmunol 2022; 367:577874. [DOI: 10.1016/j.jneuroim.2022.577874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 03/17/2022] [Accepted: 04/19/2022] [Indexed: 11/25/2022]
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95
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Tomita K, Yamanishi-Taira S, Igarashi K, Oogai Y, Kuwahara Y, Roudkenar MH, Roushandeh AM, Miyawaki S, Kurimasa A, Sato T. Oxytocin ameliorates KCC2 decrease induced by oral bacteria-derived LPS that affect rat primary cultured cells and PC-12 cells. Peptides 2022; 150:170734. [PMID: 34974081 DOI: 10.1016/j.peptides.2021.170734] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/01/2021] [Accepted: 12/28/2021] [Indexed: 01/01/2023]
Abstract
Inflammation, especially neuroinflammation, which is caused by stress, leads to central nervous system (CNS) dysfunction. Because lipopolysaccharides (LPSs) cause neuroinflammation, we investigated the effect of LPSs to CNS. In PC-12 cells, LPSs derived from oral bacteria reduced the expression of KCC2, a Cl- transporter. LPS derived from P. gingivalis (P. g) administered to rat primary cultured cells also reduced the KCC2 expression. However, LPSs derived from E. coli did not reduce the KCC2 expression. LPS treatment activated TLR4, IL-1β, and REST gene expressions, which led to KCC2 inactivation in PC-12 cells. The mechanism of KCC2 has been shown to play an important role in brain maturation, function (such as the GABA switch), and behavioral problems, we investigated the GABA function. We found that the GABA function was changed from inhibitory to excitatory by the LPS derived from P. g treatment. We demonstrated that the GSK3β also involved in the KCC2 reduction by LPS treatment. We show that oxytocin rescued the reduction in KCC2 expression caused by LPSs by inhibiting GSK3β signaling but vasopressin could not. Considered together, our results indicate that the LPSs from oral bacteria but not the LPS from E. coli increase the risk for brain disorders and oxytocin might be a candidate to overcome the abnormal behavior caused by brain disorders such as psychiatric disorders.
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Affiliation(s)
- Kazuo Tomita
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.
| | - Sayuri Yamanishi-Taira
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan; Department of Orthodontics and Dentofacial Orthopedics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Kento Igarashi
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yuichi Oogai
- Department of Oral Microbiology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yoshikazu Kuwahara
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan; Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Mehryar Habibi Roudkenar
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan; Burn and Regenerative Medicine Research Center, Velayat Hospital, School of Medicine, Guilan University of Medical Sciences, Parastar St., Rasht, 41887-94755, Iran
| | - Amaneh Mohammadi Roushandeh
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan; Burn and Regenerative Medicine Research Center, Velayat Hospital, School of Medicine, Guilan University of Medical Sciences, Parastar St., Rasht, 41887-94755, Iran
| | - Shouichi Miyawaki
- Department of Orthodontics and Dentofacial Orthopedics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Akihiro Kurimasa
- Division of Radiation Biology and Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tomoaki Sato
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.
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96
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Yang X, Zhang F, Du Y, Cui W, Dou Y, Lin Y, Zhao Z, Ma X. Effect of tetrahedral DNA nanostructures on LPS‐induced neuroinflammation in mice. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.10.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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97
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Schütze S, Döpke A, Kellert B, Seele J, Ballüer M, Bunkowski S, Kreutzfeldt M, Brück W, Nau R. Intracerebral Infection with E. coli Impairs Spatial Learning and Induces Necrosis of Hippocampal Neurons in the Tg2576 Mouse Model of Alzheimer’s Disease. J Alzheimers Dis Rep 2022; 6:101-114. [PMID: 35530117 PMCID: PMC9028720 DOI: 10.3233/adr-210049] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 02/15/2022] [Indexed: 11/15/2022] Open
Abstract
Background: In patients with Alzheimer’s disease (AD), bacterial infections are often associated with a cognitive decline. Animal models of genuine acute infections with viable bacteria which induce deterioration of neurodegenerative diseases are missing. Objective: We assessed the effect of an intracerebral infection with E. coli in a mouse model of AD. Methods: 13-month-old Tg2576 +/- mice and transgene negative littermates (Tg2576 -/-) received an intracerebral injection with E. coli K1 or saline followed by treatment with ceftriaxone starting 41 h post infection (p.i.) for 5 days. For 4 weeks, mice were monitored for clinical status, weight, motor functions, and neuropsychological status using the Morris water maze. ELISAs, stainings, and immunohistochemistry in brains were performed at the end of the experiment. Results: Mortality of the infection was approximately 20%. After 4 weeks, spatial learning of infected Tg2576 +/- mice was compromised compared to non-infected Tg2576 +/- mice (p < 0.05). E. coli infection did not influence spatial learning in Tg2576 -/- mice, or spatial memory in both Tg2576 +/- and -/- mice within 4 weeks p.i.. Necrosis of hippocampal neurons was induced in infected compared to non-infected Tg2576 +/- mice 4 weeks p.i., whereas brain concentrations of Aβ1–40, Aβ1–42, and phosphoTau as well as axonal damage and microglia density were not altered. Conclusion: Here, we proved in principle that a genuine acute bacterial infection can worsen cognitive functions of AD mice. Mouse models of subacute systemic infections are needed to develop new strategies for the treatment of bacterial infections in patients with AD in order to minimize their cognitive decline.
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Affiliation(s)
- Sandra Schütze
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
- Department of Geriatrics, Neurogeriatric Section, AGAPLESION Frankfurter Diakonie Kliniken, Frankfurt, Germany
| | - Anika Döpke
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Benedikt Kellert
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Jana Seele
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Melissa Ballüer
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Stephanie Bunkowski
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Mario Kreutzfeldt
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
- Department of Pathology and Immunology, University of Geneva and Division of Clinical Pathology, Geneva University Hospital, Centre Médical Universitaire, Geneva, Switzerland
| | - Wolfgang Brück
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Roland Nau
- Institute of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
- Department of Geriatrics, Evangelisches Krankenhaus Göttingen-Weende, Göttingen, Germany
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98
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Kang JY, Lee JS, Seol IC, Kim YS, Park MS, Yoo HR. Pharmacological Effects of Gami-Yukmijihwang-Tang on the Lipopolysaccharide-Induced Hippocampus Oxidation and Inflammation via Regulation of Sirt6. Pharmaceuticals (Basel) 2022; 15:ph15030293. [PMID: 35337091 PMCID: PMC8955486 DOI: 10.3390/ph15030293] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/19/2022] [Accepted: 02/20/2022] [Indexed: 11/17/2022] Open
Abstract
Yukmijihwang-Tang is widely used in traditional Korean medicine to treat age-related disorders. In the present study, we re-prescribed Gami-Yukmijihwang-Tang (YJT), which is slightly modified from Yukmijihwang-Tang by adding more medicinal plants to evaluate its pharmacological effects on underlying mechanisms against repeated lipopolysaccharide (LPS)-injection-induced neuroinflammation in the hippocampus regions. C57BL/6J male mice (16–24 weeks old) were divided into six groups: (1) the control group (DW with 0.9% saline injection), (2) LPS group (DW with LPS injection), YJT groups ((3) 100, (4) 200, or (5) 400 mg/kg of YJT with LPS injection), and (6) glutathione (GSH) group (100 mg/kg of GSH with LPS injection), respectively. Mice were orally administrated with various doses of YJT or glutathione (GSH) for the first five days. Neuroinflammation in the hippocampus region was induced by repeated injection of LPS during the last three days. As predicted, LPS not only increased oxidative stress–related markers including malondialdehyde, 4-hydroxynonenal, nitrotryptophan, and hydrogen peroxide, but also drastically enhanced inflammatory reactions including nitric oxide, inducible nitric oxide synthase, p65, and toll-like receptor 4, respectively. YJT administration, on the other hand, notably decreased the above pathological alterations by enhancement of antioxidant capacities such as superoxide dismutase and catalase activities. To explain the underlying pharmacological actions of YJT, we focused on a representative epigenetic regulator, a nicotinamide adenine dinucleotide + (NAD+)–dependent chromatin enzyme, Sirtuin 6 (Sirt6). Neuroinflammation in hippocampus regions depleted Sirt6 at the protein level and this alteration directly affected the nuclear factor erythroid 2–related factor (Nrf2)/hemeoxygenase (HO)-1 signaling pathway in the LPS group; however, YJT significantly recovered the Sirt6 protein levels, and it could recover the abnormal status of Nrf2/HO-1 signaling pathways in the hippocampus regions. Additionally, Sirt6 led to the up-regulation of GSH sub-enzymes of mRNA expression and protein levels of total GSH content. These findings suggest that YJT can protect against LPS-induced neuroinflammation and oxidative stress by regulating the Sirt6-related pathways and normalizing the GSH redox cycle.
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Affiliation(s)
- Jie-Yoon Kang
- Department of Cardiology and Neurology of Korean Medicine, College of Korean Medicine, Daejeon University, Daejeon 34520, Korea; (J.-Y.K.); (I.-C.S.); (Y.-S.K.)
| | - Jong-Suk Lee
- Biocenter, Gyeonggido Business & Science Accelerator (GBSA), Suwon 16229, Korea;
| | - In-Chan Seol
- Department of Cardiology and Neurology of Korean Medicine, College of Korean Medicine, Daejeon University, Daejeon 34520, Korea; (J.-Y.K.); (I.-C.S.); (Y.-S.K.)
| | - Yoon-Sik Kim
- Department of Cardiology and Neurology of Korean Medicine, College of Korean Medicine, Daejeon University, Daejeon 34520, Korea; (J.-Y.K.); (I.-C.S.); (Y.-S.K.)
| | - Miso S. Park
- Department of Cardiology and Neurology of Korean Medicine, College of Korean Medicine, Daejeon University, Daejeon 34520, Korea; (J.-Y.K.); (I.-C.S.); (Y.-S.K.)
- Correspondence: (M.S.P.); (H.-R.Y.)
| | - Ho-Ryong Yoo
- Department of Cardiology and Neurology of Korean Medicine, College of Korean Medicine, Daejeon University, Daejeon 34520, Korea; (J.-Y.K.); (I.-C.S.); (Y.-S.K.)
- Correspondence: (M.S.P.); (H.-R.Y.)
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99
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Chen P, Yang L, Tong Y, Meng L, Zhou R. The intracerebroventricular injection of lipopolysaccharide may induce neurogenic detrusor overactivity symptoms in mice. Neurourol Urodyn 2022; 41:894-904. [PMID: 35224770 DOI: 10.1002/nau.24890] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/25/2022] [Accepted: 01/29/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Pengfei Chen
- Department of Urology, Jing'an District Central Hospital Fudan University Shanghai China
| | - Lei Yang
- Department of Urology, Jing'an District Central Hospital Fudan University Shanghai China
| | - Yu Tong
- Department of Urology, Jing'an District Central Hospital Fudan University Shanghai China
| | - Li Meng
- Department of Urology, Jing'an District Central Hospital Fudan University Shanghai China
| | - Renyuan Zhou
- Department of Urology, Jing'an District Central Hospital Fudan University Shanghai China
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100
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Yoshioka Y, Sugino Y, Yamamuro A, Ishimaru Y, Maeda S. Dopamine inhibits the expression of proinflammatory cytokines of microglial cells through the formation of dopamine quinone in the mouse striatum. J Pharmacol Sci 2022; 148:41-50. [PMID: 34924128 DOI: 10.1016/j.jphs.2021.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 09/18/2021] [Accepted: 10/06/2021] [Indexed: 12/28/2022] Open
Abstract
We previously reported that dopamine (DA) attenuated lipopolysaccharide (LPS)-induced expression of proinflammatory cytokines through the formation of DA quinone (DAQ) in murine microglial cell line BV-2 and primary murine microglial cells. To reveal whether DA inhibits the expression of proinflammatory cytokines of microglial cells through the formation of DAQ in the central nervous system (CNS), in this study, we examined the effect of DAQ on LPS-induced mRNA expression of proinflammatory cytokines in C57BL/6 mouse brain under two experimental conditions: 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) administration and l-dopa/carbidopa administration. Acute MPTP administration reduced the number of tyrosine hydroxylase-positive cells in the substantia nigra, and decreased the level of quinoprotein, an indicator of DAQ formation, in the striatum. Real-time RT-PCR analysis revealed that intraperitoneal administration of LPS increased the mRNA levels of proinflammatory cytokines, including tumor-necrosis factor-α and interleukin-1β, in the striatum. These increases were enhanced in MPTP-treated mice. On the other hand, l-dopa/carbidopa administration increased the level of quinoprotein, attenuated the LPS-induced mRNA expression of proinflammatory cytokines, and reduced the LPS-induced increase in the number of microglial cells in the striatum. These results suggest that DA attenuate the expression of proinflammatory cytokines in microglia through the formation of DAQ in the CNS.
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Affiliation(s)
- Yasuhiro Yoshioka
- Laboratory of Pharmacotherapeutics, Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan.
| | - Yuta Sugino
- Laboratory of Pharmacotherapeutics, Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Akiko Yamamuro
- Laboratory of Pharmacotherapeutics, Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Yuki Ishimaru
- Laboratory of Pharmacotherapeutics, Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Sadaaki Maeda
- Laboratory of Pharmacotherapeutics, Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
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