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Jian C, Wang M, Qian Y, Song X, Wang L, Li L, Huang L, Wang G, Shi X, Dong J, Li H, Lin A, Shi L. A TLR4-Targeting Bioactive Peptide Hydrogel to Regulate Immune-Microenvironment for Diabetic Wound Repair. Adv Healthc Mater 2024; 13:e2400391. [PMID: 38568683 DOI: 10.1002/adhm.202400391] [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: 01/31/2024] [Revised: 03/29/2024] [Indexed: 04/13/2024]
Abstract
Persistent inflammation and disrupted immunoregulation are critical factors in impeding diabetic wound healing. While immunoregulatory hydrogel dressings hold significant promise for clinical applications in diabetic wound healing, the current application often demands intricate interventions and high-cost treatments involving cytokines and cell therapies. The development of single component immunoregulatory hydrogels remains a complex challenge. To address this issue, an active peptide hydrogel with immunoregulatory properties targeting the TLR4/NF-kB pathway, aiming to promote rapid diabetic wound healing, is engineered. The hydrogel sequence comprises naphthalene derivative, phenylalanine, and glycine to modulate hydrophilic/hydrophobic characteristics. The amino group on arginine contributes to tissue adhesion and regulation of intermolecular forces, ultimately yielding stable gels. The results underscore the formation of the peptide hydrogel (NFA) via the physical crosslinking of self-assembled nanofibers in water, thereby affording both excellent injectability and tissue adhesion. Notably, NFA demonstrates significant potential in promoting wound healing in a mouse model with full-thickness wounds by regulating macrophage responses in the inflammatory microenvironment through the TLR4/NF-kB pathway.
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Affiliation(s)
- Chuanjiang Jian
- The Eighth Affiliated Hospital Sun Yat-sen University, 3025 Shennan Middle Road, Shenzhen, 518000, China
| | - Minjia Wang
- The Eighth Affiliated Hospital Sun Yat-sen University, 3025 Shennan Middle Road, Shenzhen, 518000, China
| | - Yunyun Qian
- Department of Organ Transplantation, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China
| | - Xuejiao Song
- The Eighth Affiliated Hospital Sun Yat-sen University, 3025 Shennan Middle Road, Shenzhen, 518000, China
| | - Li Wang
- Precision Research Center for Refractory Diseases in Shanghai General Hospital, Shanghai Key Laboratory of Pancreatic Diseases, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Ling Li
- The Eighth Affiliated Hospital Sun Yat-sen University, 3025 Shennan Middle Road, Shenzhen, 518000, China
| | - Lulu Huang
- Vaccine Center, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Guan Wang
- Department of Immunology, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning, 116044, China
| | - Xianjie Shi
- The Eighth Affiliated Hospital Sun Yat-sen University, 3025 Shennan Middle Road, Shenzhen, 518000, China
| | - Jinqiao Dong
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hao Li
- Department of Organ Transplantation, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361005, China
| | - Ang Lin
- Vaccine Center, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Leilei Shi
- Precision Research Center for Refractory Diseases in Shanghai General Hospital, Shanghai Key Laboratory of Pancreatic Diseases, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
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Zhang Y, Chen Q, Chen D, Zhao W, Wang H, Yang M, Xiang Z, Yuan H. SerpinA3N attenuates ischemic stroke injury by reducing apoptosis and neuroinflammation. CNS Neurosci Ther 2021; 28:566-579. [PMID: 34897996 PMCID: PMC8928918 DOI: 10.1111/cns.13776] [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: 07/27/2021] [Revised: 11/14/2021] [Accepted: 11/27/2021] [Indexed: 11/30/2022] Open
Abstract
Objective To assess the effect of serine protein inhibitor A3N (serpinA3N) in ischemic stroke and to explore its mechanism of action. Methods Mouse ischemic stroke model was induced by transient middle cerebral artery occlusion followed by reperfusion. The expression pattern of serpinA3N was assessed using immunofluorescence, Western blot analysis, and real‐time quantitative PCR. An adeno‐associated virus (AAV) and recombinant serpinA3N were administered. Additionally, co‐immunoprecipitation‐mass spectrometry and immunofluorescence co‐staining were used to identify protein interactions. Results SerpinA3N was upregulated in astrocytes and neurons within the ischemic penumbra after stroke in the acute phase. The expression of serpinA3N gradually increased 6 h after reperfusion, peaked on the day 2–3, and then decreased by day 7. Overexpression of serpinA3N by AAV significantly reduced the infarct size and improved motor function, associated with alleviated inflammation and oxidative stress. SerpinA3N treatment also reduced apoptosis both in vivo and in vitro. Co‐immunoprecipitation‐mass spectrometry and Western blotting revealed that clusterin interacts with serpinA3N, and Akt‐mTOR pathway members were upregulated by serpinA3N both in vivo and in vitro. Conclusions SerpinA3N is expressed in astrocytes and penumbra neurons after stroke in mice. It reduces brain damage possibly via interacting with clusterin and inhibiting neuronal apoptosis and neuroinflammation.
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Affiliation(s)
- Yu Zhang
- Department of Anesthesiology, Second Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Qianbo Chen
- Department of Anesthesiology, Third Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Dashuang Chen
- Department of Anesthesiology, Second Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Wenqi Zhao
- Department of Anesthesiology, Second Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Haowei Wang
- Department of Anesthesiology, Second Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Mei Yang
- Department of Anesthesiology, Second Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Zhenghua Xiang
- Department of Neurobiology, Key Laboratory of Molecular Neurobiology, Ministry of Education, Naval Medical University, Shanghai, China
| | - Hongbin Yuan
- Department of Anesthesiology, Second Affiliated Hospital of Naval Medical University, Shanghai, China
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Feraco P, Nigro S, Passamonti L, Grecucci A, Caligiuri ME, Gagliardo C, Bacci A. Neurochemical Correlates of Brain Atrophy in Fibromyalgia Syndrome: A Magnetic Resonance Spectroscopy and Cortical Thickness Study. Brain Sci 2020; 10:brainsci10060395. [PMID: 32575715 PMCID: PMC7349375 DOI: 10.3390/brainsci10060395] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 12/22/2022] Open
Abstract
(1) Background: Recently, a series of clinical neuroimaging studies on fibromyalgia (FM) have shown a reduction in cortical volume and abnormally high glutamate (Glu) and glutamate + glutamine (Glx) levels in regions associated with pain modulation. However, it remains unclear whether the volumetric decreases and increased Glu levels in FM are related each other. We hypothesized that higher Glu levels are related to decreases in cortical thickness (CT) and volume in FM patients. (2) Methods: Twelve females with FM and 12 matched healthy controls participated in a session of combined 3.0 Tesla structural magnetic resonance imaging (MRI) and single-voxel MR spectroscopy focused on the thalami and ventrolateral prefrontal cortices (VLPFC). The thickness of the cortical and subcortical gray matter structures and the Glu/Cr and Glx/Cr ratios were estimated. Statistics included an independent t-test and Spearman’s test. (3) Results: The Glu/Cr ratio of the left VLPFC was negatively related to the CT of the left inferior frontal gyrus (pars opercularis (p = 0.01; r = −0.75) and triangularis (p = 0.01; r = −0.70)). Moreover, the Glx/Cr ratio of the left VLPFC was negatively related to the CT of the left middle anterior cingulate gyrus (p = 0.003; r = −0.81). Significantly lower CTs in FM were detected in subparts of the cingulate gyrus on both sides and in the right inferior occipital gyrus (p < 0.001). (4) Conclusions: Our findings are in line with previous observations that high glutamate levels can be related, in a concentration-dependent manner, to the morphological atrophy described in FM patients.
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Affiliation(s)
- Paola Feraco
- Neuroradiology Unit, S. Chiara Hospital, Largo Medaglie d’oro 9, 38122 Trento, Italy
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Via San Giacomo 14, 40100 Bologna, Italy
- Correspondence: ; Tel.: +39-0461903543
| | - Salvatore Nigro
- Neuroscience Research Center, University “Magna Graecia” of Catanzaro, Viale Europa, 88100 Catanzaro, Italy; (S.N.); (M.E.C.)
| | - Luca Passamonti
- Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 1TN, UK;
- Istituto di Bioimmagini e Fisiologia Molecolare (IBFM), CNR, Via Fratelli Cervi, Segrate, 93-20090 Milan, Italy
| | - Alessandro Grecucci
- Department of Psychology and Cognitive Sciences, University of Trento, Corso Bettini, 84 I-38068 Rovereto, Italy;
| | - Maria Eugenia Caligiuri
- Neuroscience Research Center, University “Magna Graecia” of Catanzaro, Viale Europa, 88100 Catanzaro, Italy; (S.N.); (M.E.C.)
| | - Cesare Gagliardo
- Section of Radiological Sciences, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, Via Del Vespro, 90127 Palermo, Italy;
| | - Antonella Bacci
- Neuroradiology Unit, IRCSS Istituto Delle Scienze Neurologiche di Bologna, Via Altura 3, 40100 Bologna, Italy;
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Discovery of novel small molecule TLR4 inhibitors as potent anti-inflammatory agents. Eur J Med Chem 2018; 154:253-266. [DOI: 10.1016/j.ejmech.2018.05.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/13/2018] [Accepted: 05/20/2018] [Indexed: 01/01/2023]
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Expression of Neuronal NO Synthase and the Hyperglycemic Reflex to Anoxic Stimulation of the Carotid Body in Normoglycemic and Hyperglycemic Rats. NEUROPHYSIOLOGY+ 2018. [DOI: 10.1007/s11062-018-9722-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Rubio-Casillas A, Fernández-Guasti A. The dose makes the poison: from glutamate-mediated neurogenesis to neuronal atrophy and depression. Rev Neurosci 2018; 27:599-622. [PMID: 27096778 DOI: 10.1515/revneuro-2015-0066] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 03/04/2016] [Indexed: 12/21/2022]
Abstract
Experimental evidence has demonstrated that glutamate is an essential factor for neurogenesis, whereas another line of research postulates that excessive glutamatergic neurotransmission is associated with the pathogenesis of depression. The present review shows that such paradox can be explained within the framework of hormesis, defined as biphasic dose responses. Low glutamate levels activate adaptive stress responses that include proteins that protect neurons against more severe stress. Conversely, abnormally high levels of glutamate, resulting from increased release and/or decreased removal, cause neuronal atrophy and depression. The dysregulation of the glutamatergic transmission in depression could be underlined by several factors including a decreased inhibition (γ-aminobutyric acid or serotonin) or an increased excitation (primarily within the glutamatergic system). Experimental evidence shows that the activation of N-methyl-D-aspartate receptor (NMDA) and α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors (AMPAR) can exert two opposite effects on neurogenesis and neuron survival depending on the synaptic or extrasynaptic concentration. Chronic stress, which usually underlies experimental and clinical depression, enhances glutamate release. This overactivates NMDA receptors (NMDAR) and consequently impairs AMPAR activity. Various studies show that treatment with antidepressants decreases plasma glutamate levels in depressed individuals and regulates glutamate receptors by reducing NMDAR function by decreasing the expression of its subunits and by potentiating AMPAR-mediated transmission. Additionally, it has been shown that chronic treatment with antidepressants having divergent mechanisms of action (including tricyclics, selective serotonin reuptake inhibitors, and ketamine) markedly reduced depolarization-evoked glutamate release in the hippocampus. These data, taken together, suggest that the glutamatergic system could be a final common pathway for antidepressant treatments.
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Neuronal NOS Induces Neuronal Differentiation Through a PKCα-Dependent GSK3β Inactivation Pathway in Hippocampal Neural Progenitor Cells. Mol Neurobiol 2016; 54:5646-5656. [PMID: 27624386 DOI: 10.1007/s12035-016-0110-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 09/06/2016] [Indexed: 12/12/2022]
Abstract
We investigated the role of neuronal nitric oxide synthase (nNOS) in the neuronal differentiation of neural progenitor cells (NPCs) from hippocampi of E16.5 rat embryos. The production of nitric oxide (NO) and nNOS expression increased markedly during neuronal differentiation as did the expression of neurotrophin-3 (NT3), neurotrophin-4/5 (NT 4/5), and synapsin I. nNOS siRNA or the nNOS inhibitor, 7-nitroindazole (7-NI), decreased expression of the neurotrophins and synapsin I, and suppressed neurite outgrowth. These results suggest that nNOS plays a critical role in neuronal differentiation of hippocampal NPCs. nNOS-mediated neuronal differentiation is controlled by calcineurin since cyclosporin A (CsA), a calcineurin inhibitor, decreased nNOS activation and NO production, and inhibited neurite outgrowth. We found that inactivation of glycogen synthase kinase-3 beta (GSK3β) resulting from activation of protein kinase C alpha (PKCα) is involved in the nNOS-mediated neuronal differentiation. Moreover, lithium chloride (LiCl), a GSK3β inhibitor, increased neuronal differentiation by inhibiting the proliferation of NPCs. Taken together, these results suggest that neuronal differentiation is dependent on calcineurin-mediated activation of nNOS; this induces PKCα-dependent inactivation of GSK3β, which leads to inhibition of the proliferation of hippocampal NPCs.
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Tian H, Ye X, Hou X, Yang X, Yang J, Wu C. SVCT2, a potential therapeutic target, protects against oxidative stress during ethanol-induced neurotoxicity via JNK/p38 MAPKs, NF-κB and miRNA125a-5p. Free Radic Biol Med 2016; 96:362-73. [PMID: 27085842 DOI: 10.1016/j.freeradbiomed.2016.03.039] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Revised: 03/21/2016] [Accepted: 03/31/2016] [Indexed: 12/29/2022]
Abstract
Sodium vitamin C transporter 2 (SVCT2) plays a key role in transporting ascorbic acid (AA), an important intracellular antioxidant, into neurons. It is well known that ethanol (EtOH) abuse causes significant neurodegeneration, as well as endogenous AA release in certain encephalic regions. Here, we identified that SVCT2 forms part of a self-defense mechanism that protects against oxidative stress in binge drinking rats, and SVCT2 levels are correlated with antioxidants and neuronal injury. Four days of binge drinking led to massive neuron degeneration in prefrontal cortex (PFC), accompanied by increased levels of 4-hydroxynonenal (4-HNE)-adducted proteins and SVCT2 expression, as well as dramatic changes in AA levels in rat brain. AA levels were decreased in PFC and increased in cerebrospinal fluid (CSF) after binge drinking, but returned to normal on the 7th day following EtOH withdrawal. These processes were further evaluated in primary cortical neurons exposed to 100mM EtOH in vitro. Neurons transfected with SVCT2 siRNA were more susceptible than controls to certain aspects of EtOH-induced injury, including cell death, dendrite damage and increased oxidative stress. EtOH-induced up-regulation of SVCT2 was associated with activation of JNK and p38 MAPKs and the NF-κB pathway. More importantly, miRNA-125a-5p was down-regulated in PFC of 4-day binge drinking rats and negatively regulated protein expression during EtOH-induced neuronal injury. MiR-125a-5p over-expression attenuated intracellular AA levels, promoted cell death and suppressed the EtOH-induced up-regulation of p38 MAPK and SVCT2, which suggested that miR-125a-5p plays an important role in SVCT2 function in EtOH-induced neuronal injury. We speculate that SVCT2, possibly regulated by JNK/p38 MAPKs, NF-κB signaling and miR-125a-5p, has a neuroprotective effect against EtOH-induced oxidative stress. Promotion of SVCT2 expression or stimulation of SVCT2 activity may be a promising therapeutic strategy for the prevention of EtOH-associated neurodegeneration.
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Affiliation(s)
- Hua Tian
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China; Department of Pharmacology, Qiqihar Medical University, Qiqihar 161006, PR China
| | - Xiaoxia Ye
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Xiaojie Hou
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Xiaowei Yang
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Jingyu Yang
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China.
| | - Chunfu Wu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, PR China.
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Tripathy D, Chakraborty J, Mohanakumar KP. Antagonistic pleiotropic effects of nitric oxide in the pathophysiology of Parkinson's disease. Free Radic Res 2015; 49:1129-39. [DOI: 10.3109/10715762.2015.1045505] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Zhao H, Ji ZH, Liu C, Yu XY. Neuroprotective Mechanisms of 9-Hydroxy Epinootkatol Against Glutamate-Induced Neuronal Apoptosis in Primary Neuron Culture. J Mol Neurosci 2015; 56:808-814. [DOI: 10.1007/s12031-015-0511-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 02/02/2015] [Indexed: 10/24/2022]
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