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Yang C, Li J, Luo M, Zhou W, Xing J, Yang Y, Wang L, Rao W, Tao W. Unveiling the molecular mechanisms of Dendrobium officinale polysaccharides on intestinal immunity: An integrated study of network pharmacology, molecular dynamics and in vivo experiments. Int J Biol Macromol 2024; 276:133859. [PMID: 39009260 DOI: 10.1016/j.ijbiomac.2024.133859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 06/13/2024] [Accepted: 07/11/2024] [Indexed: 07/17/2024]
Abstract
Intestinal immunity plays a pivotal role in overall immunological defenses, constructing mechanisms against pathogens while maintaining balance with commensal microbial communities. Existing therapeutic interventions may lead to drug resistance and potential toxicity when immune capacity is compromised. Dendrobium officinale, a traditional Chinese medicine, contains components identified to bolster immunity. Employing network pharmacology strategies, this study identified constituents of Dendrobium officinale and their action targets in the TCMSP and Swiss Target Prediction databases, and compared them with intestinal immunity-related targets. Protein-protein interaction networks revealed the core targets of Dendrobium officinale polysaccharides, encompassing key pathways such as cell proliferation, inflammatory response, and immune reactions, particularly in association with the Toll-like receptor 4. Molecular docking and molecular dynamics simulation further confirmed the high affinity and stability between Dendrobium officinale polysaccharides and Toll-like receptor 4. In vivo experiments demonstrated that Dendrobium officinale polysaccharides modulates the expression of Toll-like receptor 4 and its downstream key proteins in the colonic mucosa of mice. Consequently, these findings suggest that Dendrobium officinale polysaccharides may serve as a potential modulator for intestinal immune functions, with its mechanism potentially related to the Toll-like receptor 4.
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Affiliation(s)
- Chenchen Yang
- Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Jingrui Li
- Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Mengfan Luo
- Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Wanyi Zhou
- Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Jianrong Xing
- Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Ying Yang
- Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Lu Wang
- School of Life Sciences, Westlake University, Hangzhou 310024, China
| | - Wenjia Rao
- School of Sciences, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Wenyang Tao
- Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
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El Baassiri MG, Raouf Z, Jang HS, Scheese D, Duess JW, Fulton WB, Sodhi CP, Hackam DJ, Nasr IW. Ccr2-dependent monocytes exacerbate intestinal inflammation and modulate gut serotonergic signaling following traumatic brain injury. J Trauma Acute Care Surg 2024; 97:356-364. [PMID: 38189659 DOI: 10.1097/ta.0000000000004246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
BACKGROUND Traumatic brain injury (TBI) leads to acute gastrointestinal dysfunction and mucosal damage, resulting in feeding intolerance. C-C motif chemokine receptor 2 (Ccr2 + ) monocytes are crucial immune cells that regulate the gut's inflammatory response via the brain-gut axis. Using Ccr2 ko mice, we investigated the intricate interplay between these cells to better elucidate the role of systemic inflammation after TBI. METHODS A murine-controlled cortical impact model was used, and results were analyzed on postinjury days 1 and 3. The experimental groups included (1) sham C57Bl/6 wild type (WT), (2) TBI WT, (3) sham Ccr2 ko , and (4) TBI Ccr2 ko . Mice were euthanized on postinjury days 1 and 3 to harvest the ileum and study intestinal dysfunction and serotonergic signaling using a combination of quantitative real-time polymerase chain reaction, immunohistochemistry, fluorescein isothiocyanate-dextran motility assays, and flow cytometry. Student's t test and one-way analysis of variance were used for statistical analysis, with significance achieved when p < 0.05. RESULTS Traumatic brain injury resulted in severe dysfunction and dysmotility of the small intestine in WT mice as established by significant upregulation of inflammatory cytokines iNOS , Lcn2 , TNFα , and IL1β and the innate immunity receptor toll-like receptor 4 ( Tlr4 ). This was accompanied by disruption of genes related to serotonin synthesis and degradation. Notably, Ccr2 ko mice subjected to TBI showed substantial improvements in intestinal pathology. Traumatic brain injury Ccr2 ko groups demonstrated reduced expression of inflammatory mediators ( iNOS , Lcn2 , IL1β , and Tlr4 ) and improvement in serotonin synthesis genes, including tryptophan hydroxylase 1 ( Tph1 ) and dopa decarboxylase ( Ddc ). CONCLUSION Our study reveals a critical role for Ccr2 + monocytes in modulating intestinal homeostasis after TBI. Ccr2 + monocytes aggravate intestinal inflammation and alter gut-derived serotonergic signaling. Therefore, targeting Ccr2 + monocyte-dependent responses could provide a better understanding of TBI-induced gut inflammation. Further studies are required to elucidate the impact of these changes on brain neuroinflammation and cognitive outcomes.
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Affiliation(s)
- Mahmoud G El Baassiri
- From the Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Zhao D, Ji H, Zhao H, Xu Y, He A, He Y. BMSC-derived exosomes regulate the Treg/Th17 balance through the miR-21-5p/TLR4/MyD88/NF-κB pathway to alleviate dry eye symptoms in mice. In Vitro Cell Dev Biol Anim 2024; 60:644-656. [PMID: 38684579 DOI: 10.1007/s11626-024-00910-6] [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: 02/21/2024] [Accepted: 04/08/2024] [Indexed: 05/02/2024]
Abstract
Bone marrow mesenchymal stem cell (BMSC)-derived exosomes (BMSC-Exos) have a variety of biological functions and are extensively involved in the regulation of inflammatory diseases, as well as tissue repair and regeneration. However, the mechanism of action of these compounds in dry eye disease (DED) in mice is still unclear. This study demonstrated that the Treg/Th17 ratio was strongly imbalanced in DED clinical samples. BMSC-Exos can modulate the Treg/Th17 balance, improve the integrity of the corneal epithelial layer, and ameliorate DED progression in mice. Mechanistically, BMSC-Exos dramatically decreased the levels of IL-17 and IL-22; increased the levels of IL-4, IL-10, and TGF-β1; and increased tear secretion and the number of goblet cells in the conjunctiva in mice, thus alleviating the progression of DED. This effect is achieved by BMSC-Exos through the delivery of miR-21-5p to target and restrain TLR4, thereby restraining the MyD88/NF-κB pathway. Our study showed that the upregulation of miR-21-5p in BMSC-Exos may be a therapeutic target for DED. These findings support new ideas and a basis for treating DED, as well as for further study of the application value of exosomes in alleviating DED.
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Affiliation(s)
- Dandan Zhao
- Department of Ophthalmology, Yan'an Hospital of Kunming City, Kunming, Yunnan, 650051, China
| | - Hao Ji
- Department of Information, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, 650032, China
| | - Hongxia Zhao
- Department of Ophthalmology, Yan'an Hospital of Kunming City, Kunming, Yunnan, 650051, China
| | - Yanze Xu
- Department of Ophthalmology, Yan'an Hospital of Kunming City, Kunming, Yunnan, 650051, China
| | - Anni He
- Department of Ophthalmology, Kunming Medical University, Kunming, Yunnan, 650500, China
| | - Yang He
- Department of Ophthalmology, Yan'an Hospital of Kunming City, Kunming, Yunnan, 650051, China.
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Sudhakar K, Dugar N, Jupudi S, Ashwin R, Gowthamarajan K. Unveiling molecular insights: in silico exploration of TLR4 antagonist for management of dry eye syndrome. BMJ Open Ophthalmol 2024; 9:e001610. [PMID: 38702178 PMCID: PMC11086362 DOI: 10.1136/bmjophth-2023-001610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 04/17/2024] [Indexed: 05/06/2024] Open
Abstract
BACKGROUND Dry eye disease is the most commonplace multifractional ocular complication, which has already affected millions of people in the world. It is identified by the excessive buildup of reactive oxygen species, leading to substantial corneal epithelial cell demise and ocular surface inflammation attributed to TLR4. In this study, we aimed to identify potential compounds to treat of dry eye syndrome by exploring in silico methods. METHODS In this research, molecular docking and dynamics simulation tests were used to examine the effects of selected compounds on TLR4 receptor. Compounds were extracted from different databases and were prepared and docked against TLR4 receptor via Autodock Vina. Celastrol, lumacaftor and nilotinib were selected for further molecular dynamics studies for a deeper understanding of molecular systems consisting of protein and ligands by using the Desmond module of the Schrodinger Suite. RESULTS The docking results revealed that the compounds are having binding affinity in the range of -5.1 to -8.78 based on the binding affinity and three-dimensional interactions celastrol, lumacaftor and nilotinib were further studied for their activity by molecular dynamics. Among the three compounds, celastrol was the most stable based on molecular dynamics trajectory analysis from 100 ns in the catalytic pockets of 2Z63.pdb.pdb. Root mean square deviation of celastrol/2Z63 was in the range of 1.8-4.8 Å. CONCLUSION In particular, Glu376 of TLR4 receptor is crucial for the identification and binding of lipopolysaccharides (LPS), which are part of Gram-negative bacteria's outer membrane. In our investigation, celastrol binds to Glu376, suggesting that celastrol may prevent the dry eye syndrome by inhibiting LPS's binding to TLR4.
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Affiliation(s)
- Kothandan Sudhakar
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Ooty,The Nilgiris-643001, Tamil Nadu, India
| | - Neeru Dugar
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Ooty, The Nilgiris-643001, Tamil Nadu, India
| | - Srikanth Jupudi
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Ooty, The Nilgiris-643001, Tamil Nadu, India
| | - Ravichandran Ashwin
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Ooty,The Nilgiris-643001, Tamil Nadu, India
| | - Kuppusamy Gowthamarajan
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Ooty,The Nilgiris-643001, Tamil Nadu, India
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Awasthi S, Singh B, Ramani V, Godbole NM, King C. Involvement of endoplasmic reticulum and histone proteins in immunomodulation by TLR4-interacting SPA4 peptide against Escherichia coli. Infect Immun 2023; 91:e0031123. [PMID: 37909750 PMCID: PMC10714950 DOI: 10.1128/iai.00311-23] [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: 08/09/2023] [Accepted: 09/26/2023] [Indexed: 11/03/2023] Open
Abstract
Pulmonary host defense is critical for the control of lung infection and inflammation. An increased expression and activity of Toll-like receptor 4 (TLR4) induce phagocytic uptake/clearance and inflammation against Gram-negative bacteria. In this study, we addressed the mechanistic aspect of the immunomodulatory activity of the TLR4-interacting SPA4 peptide (amino acid sequence GDFRYSDGTPVNYTNWYRGE) against Escherichia coli. Binding of the SPA4 peptide to bacteria and direct anti-bacterial effects were investigated using flow cytometric, microscopic, and bacteriological methods. The bacterial uptake and inflammatory cytokine response were studied in dendritic cells expressing endogenous basal level of TLR4 or overexpressing TLR4. The subcellular distribution and co-localization of TLR4 and bacteria were investigated by immunocytochemistry. Furthermore, we studied the cellular expression and co-localization of endoplasmic reticulum (ER) molecules (calnexin and ER membrane protein complex subunit 1; EMC1) with lysosomal-associated membrane protein 1 (LAMP1) in cells infected with E. coli and treated with the SPA4 peptide. Simultaneously, the expression of histone H2A protein was quantitated by immunoblotting. Our results demonstrate no binding or direct killing of the bacteria by SPA4 peptide. Instead, it induces the uptake and localization of E. coli in the phagolysosomes for lysis and simultaneously suppresses the secreted levels of TNF-α. Overexpression of TLR4 further augments the pro-phagocytic and anti-inflammatory activity of SPA4 peptide. A time-dependent change in subcellular distribution of TLR4 and an increased co-localization of TLR4 with E. coli in SPA4 peptide-treated cells suggest an enhanced recognition and internalization of bacteria in conjugation with TLR4. Furthermore, an increased co-localization of calnexin and EMC1 with LAMP1 indicates the involvement of ER in pro-phagocytic activity of SPA4 peptide. Simultaneous reduction in secreted amounts of TNF-α coincides with suppressed histone H2A protein expression in the SPA4 peptide-treated cells. These results provide initial insights into the plausible role of ER and histones in the TLR4-immunomodulatory activity of SPA4 peptide against Gram-negative bacteria.
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Affiliation(s)
- Shanjana Awasthi
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Bhupinder Singh
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Vijay Ramani
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Nachiket M. Godbole
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Catherine King
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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Xu J, Liu J, Li Q, Li G, Zhang G, Mi Y, Zhao T, Mu D, Wang D, Zeng K, Hou Y. Pterostilbene participates in TLR4- mediated inflammatory response and autophagy-dependent Aβ 1-42 endocytosis in Alzheimer's disease. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 119:155011. [PMID: 37562093 DOI: 10.1016/j.phymed.2023.155011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/25/2023] [Accepted: 08/01/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND Alzheimer's disease (AD), the most prevalent form of dementia, remains untreatable. One of the factors that contributes to its progression is microglia-mediated inflammation. Pterostilbene, a compound isolated from Chinese dragon's blood, can reduce inflammation caused by overactive microglia. However, its effects on AD transgenic animals and the possible underlying mechanism remain unknown. METHODS We evaluated the effect of pterostilbene on learning and memory difficulties in transgenic APP/PS1 mice. We used immunofluorescence to detect microglial activation and Aβ aggregation. We explored the cellular mechanism of pterostilbene by establishing LPS- stimulated BV2 cells and oAβ1-42- exposed HEK 293T cells that overexpress TLR4 and/or MD2 via lentivirus. We applied flow cytometry and immunoprecipitation to examine how pterostilbene regulates TLR4 signaling. RESULTS Pterostilbene enhanced the learning and memory abilities of APP/PS1 mice and reduced microglial activation and Aβ aggregation in their hippocampus. Pterostilbene alleviated oAβ1-42-induced inflammation, which required the involvement of MD2. Pterostilbene disrupted the binding between TLR4 and MD2, which may further prevent TLR4 dimerization and subsequent inflammatory response. Moreover, pterostilbene restored the impaired endocytosis of oAβ1-42 through an autophagy-dependent mechanism. CONCLUSION This is the first demonstration that pterostilbene can potentially treat AD by blocking the interaction of TLR4 and MD2, thereby suppressing TLR4-mediated inflammation.
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Affiliation(s)
- Jikai Xu
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China; National Frontiers Science Center for Industrial Intelligence and Systems Optimization, Key Laboratory of Data Analytics and Optimization for Smart Industry, Ministry of Education, Northeastern University, Shenyang, China
| | - Jingyu Liu
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China; National Frontiers Science Center for Industrial Intelligence and Systems Optimization, Key Laboratory of Data Analytics and Optimization for Smart Industry, Ministry of Education, Northeastern University, Shenyang, China
| | - Qing Li
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Guoxun Li
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Guijie Zhang
- College of Pharmacy, Guilin Medical University, Guilin, China
| | - Yan Mi
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Ting Zhao
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Danyang Mu
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Dequan Wang
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Kewu Zeng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China.
| | - Yue Hou
- Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China; National Frontiers Science Center for Industrial Intelligence and Systems Optimization, Key Laboratory of Data Analytics and Optimization for Smart Industry, Ministry of Education, Northeastern University, Shenyang, China.
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Esteves AR, Silva DF, Banha D, Candeias E, Guedes B, Cardoso SM. LPS-induced mitochondrial dysfunction regulates innate immunity activation and α-synuclein oligomerization in Parkinson's disease. Redox Biol 2023; 63:102714. [PMID: 37120929 PMCID: PMC10172719 DOI: 10.1016/j.redox.2023.102714] [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: 03/27/2023] [Revised: 04/23/2023] [Accepted: 04/23/2023] [Indexed: 05/02/2023] Open
Abstract
Sporadic Parkinson's disease (sPD) is a complex multifactorial disorder which etiology remains elusive. Several mechanisms have been described to contribute to PD development namely mitochondrial dysfunction, activation of inflammatory pathways and the deposition of unfolded proteins such as α-synuclein. Our work shows for the first time that lipopolysaccharide (LPS)-induced activation of innate immunity requires a functional mitochondria and mimics PD pathology in cells. We found in primary mesencephalic neurons that LPS targeted the mitochondria and activated neuronal innate immune responses, which culminated with α-synuclein oligomerization. Moreover, in cybrid cell lines repopulated with mtDNA from sPD subjects with inherent mitochondrial dysfunction and NT2-Rho0 obtained by long-term ethidium bromide exposure, and so without a functional mitochondrial, LPS was not able to further activate innate immunity or increase α-synuclein aggregation. Herein, we showed that mesencephalic neurons are able to activate innate immunity after LPS exposure and this pathway is dependent on mitochondria. Moreover, we disclose that α-synuclein over production is an innate immune response. Our data indicate that mitochondria provide the base for innate immunity activation in idiopathic PD.
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Affiliation(s)
- A Raquel Esteves
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; IIIUC-Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal; Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal.
| | - Diana F Silva
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; IIIUC-Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal; Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal.
| | - Diogo Banha
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal.
| | - Emanuel Candeias
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; IIIUC-Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal; Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
| | - Beatriz Guedes
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal.
| | - Sandra M Cardoso
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal; Institute of Biology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.
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Dang W, Meng C, Wang J, Zhou D, Chen G, Li N. Exploration of the Binding Modes of Toll-Like Receptor 4 Competitive Inhibitors: A Combined Ligand-Based and Target-Based Approach. ChemMedChem 2023; 18:e202200690. [PMID: 36651317 DOI: 10.1002/cmdc.202200690] [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: 12/19/2022] [Revised: 01/14/2023] [Accepted: 01/17/2023] [Indexed: 01/19/2023]
Abstract
The interactions of Toll-like receptor 4 (TLR4) with competitive inhibitors were investigated by a combined ligand-based and target-based approach. Firstly, the ligand-based pharmacophore model of the reported TLR4 inhibitors was constructed by utilizing the common feature method, which included three hydrophobic groups and a hydrogen bond receptor. The Schrödinger software suite glide module was used to dock inhibitors with proteins and verify the importance of these four interaction points from the target level. Then, molecular dynamics, alanine scanning mutagenesis, and binding free energy calculation were used to identify the key amino acids in the binding mode. In addition, blind docking proved that the TLR4 inhibitor does not bind to TLR4 itself like other TLR family proteins. Based on this, we also screened a class of sesquiterpene coumarins which possibly have TLR4 inhibitory activity and will conduct a detailed study later. Together, this study revealed the interactions between TLR4 protein and its competitive inhibitors, which shed light on better access for developing its novel inhibitors.
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Affiliation(s)
- Wen Dang
- School of Traditional Chinese Materia Medica, Key Laboratory for TCM Material Basis Study and Innovative Drug Development of Shenyang City, Shenyang Pharmaceutical University, Shenyang, 110016, P.R. China
| | - Churen Meng
- School of Traditional Chinese Materia Medica, Key Laboratory for TCM Material Basis Study and Innovative Drug Development of Shenyang City, Shenyang Pharmaceutical University, Shenyang, 110016, P.R. China
| | - Jian Wang
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang, 110016, PR China
| | - Di Zhou
- School of Traditional Chinese Materia Medica, Key Laboratory for TCM Material Basis Study and Innovative Drug Development of Shenyang City, Shenyang Pharmaceutical University, Shenyang, 110016, P.R. China
| | - Gang Chen
- School of Traditional Chinese Materia Medica, Key Laboratory for TCM Material Basis Study and Innovative Drug Development of Shenyang City, Shenyang Pharmaceutical University, Shenyang, 110016, P.R. China
| | - Ning Li
- School of Traditional Chinese Materia Medica, Key Laboratory for TCM Material Basis Study and Innovative Drug Development of Shenyang City, Shenyang Pharmaceutical University, Shenyang, 110016, P.R. China
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Chen G, Liu C, Zhang M, Wang X, Xu Y. Niloticin binds to MD-2 to promote anti-inflammatory pathway activation in macrophage cells. Int J Immunopathol Pharmacol 2022; 36:3946320221133017. [PMID: 36314579 PMCID: PMC9629566 DOI: 10.1177/03946320221133017] [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: 01/13/2023] Open
Abstract
OBJECTIVES Niloticin is an active compound isolated from Cortex phellodendri with uncharacterized anti-inflammatory activity. We assessed the drug potential of niloticin and examined its ability to target myeloid differentiation protein 2 (MD-2) to ascertain the mechanism for its anti-inflammatory activity. METHODS The Traditional Chinese Medicine Systems Pharmacology Database was used to evaluate niloticin. Bio-layer interferometry and molecular docking technologies were used to explore how niloticin targets MD-2, which mediates a series of toll-like receptor 4 (TLR4)-dependent inflammatory responses. The cytokines involved in the lipopolysaccharide (LPS)-TLR4/MD-2-NF-κB pathway were evaluated using ELISA, RT-qPCR, and western blotting. RESULTS Niloticin could bind to MD-2 and had no evident effects on cell viability. Niloticin treatment significantly decreased the levels of NO, IL-6, TNF-α, and IL-1β induced by LPS (p < 0.01). IL-1β, IL-6, iNOS, TNF-α, and COX-2 mRNA expression levels were decreased by niloticin (all p < 0.01). Compared with that in the control group, the increase in TLR4, p65, MyD88, p-p65, and iNOS expression levels induced by LPS were suppressed by niloticin (all p < 0.01). CONCLUSION Our results suggest that niloticin has therapeutic potential and binds to MD-2. Niloticin binding to MD-2 antagonized the effects of LPS binding to the TLR4/MD-2 complex, resulting in the inhibition of the LPS-TLR4/MD-2-NF-κB signaling pathway.
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Affiliation(s)
- Guirong Chen
- Hospital of the Joint Logistics Support Force of the Chinese People’s Liberation Army, Dalian, China,Liaoning University of Traditional Chinese Medicine, Dalian, China
| | - Chang Liu
- Liaoning University of Traditional Chinese Medicine, Dalian, China
| | - Mingbo Zhang
- Liaoning University of Traditional Chinese Medicine, Dalian, China
| | - Xiaobo Wang
- Hospital of the Joint Logistics Support Force of the Chinese People’s Liberation Army, Dalian, China,Xiaobo Wang, Hospital of the Joint Logistics Support Force of the Chinese People’s Liberation Army, Dalian, China.
| | - Yubin Xu
- Taizhou Central Hospital (Taizhou University Hospital), Taizhou, China,Yubin Xu, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, China.
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Zhang J, Li J, Hu K, Zhou Q, Chen X, He J, Yin S, Chi Y, Liao X, Xiao Y, Qin H, Zheng Z, Chen J. Screening Novel Vaccine Candidates for Leishmania Donovani by Combining Differential Proteomics and Immunoinformatics Analysis. Front Immunol 2022; 13:902066. [PMID: 35812381 PMCID: PMC9260594 DOI: 10.3389/fimmu.2022.902066] [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: 03/22/2022] [Accepted: 05/25/2022] [Indexed: 11/18/2022] Open
Abstract
Visceral leishmaniasis (VL), also known as kala-azar, is the most dangerous form of leishmaniasis. Currently no effective vaccine is available for clinical use. Since the pathogenicity of different Leishmania strains is inconsistent, the differentially expressed proteins in Leishmania strains may play an important role as virulence factors in pathogenesis. Therefore, effective vaccine candidate targets may exist in the differentially expressed proteins. In this study, we used differential proteomics analysis to find the differentially expressed proteins in two Leishmania donovani strains, and combined with immunoinformatics analysis to find new vaccine candidates. The differentially expressed proteins from L. DD8 (low virulent) and L. 9044 (virulent) strains were analyzed by LC-MS/MS, and preliminarily screened by antigenicity, allergenicity and homology evaluation. The binding peptides of MHC II, IFN-γ and MHC I from differentially expressed proteins were then predicted and calculated for the second screening. IFN-γ/IL-10 ratios and conserved domain prediction were performed to choose more desirable differentially expressed proteins. Finally, the 3D structures of three vaccine candidate proteins were produced and submitted for molecular dynamics simulation and molecular docking interaction with TLR4/MD2. The results showed that 396 differentially expressed proteins were identified by LC-MS/MS, and 155 differentially expressed proteins were selected through antigenicity, allergenicity and homology evaluation. Finally, 16 proteins whose percentages of MHC II, IFN-γ and MHC I binding peptides were greater than those of control groups (TSA, LmSTI1, LeIF, Leish-111f) were considered to be suitable vaccine candidates. Among the 16 candidates, amino acid permease, amastin-like protein and the hypothetical protein (XP_003865405.1) simultaneously had the large ratios of IFN-γ/IL-10 and high percentages of MHC II, IFN-γ and MHC I, which should be focused on. In conclusion, our comprehensive work provided a methodological basis to screen new vaccine candidates for a better intervention against VL and associated diseases.
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Affiliation(s)
- Jianhui Zhang
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Jiao Li
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Kaifeng Hu
- Department of Clinical Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qi Zhou
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Xiaoxiao Chen
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Jinlei He
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Shuangshuang Yin
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Yangjian Chi
- Department of Urinary Surgery, Jianou Municipal Hospital of Fujian Province, Jianou, China
| | - Xuechun Liao
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Yuying Xiao
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Hanxiao Qin
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
| | - Zhiwan Zheng
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
- *Correspondence: Zhiwan Zheng, ; Jianping Chen,
| | - Jianping Chen
- Department of Pathogenic Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
- *Correspondence: Zhiwan Zheng, ; Jianping Chen,
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11
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A structural vaccinology approach for in silico designing of a potential self-assembled nanovaccine against Leishmania infantum. Exp Parasitol 2022; 239:108295. [PMID: 35709889 DOI: 10.1016/j.exppara.2022.108295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 06/01/2022] [Accepted: 06/05/2022] [Indexed: 11/23/2022]
Abstract
Visceral leishmaniasis (VL) remains a major public health problem across 98 countries. To date, VL has no effective drug. Vaccines, as the most successful breakthroughs in medicine, can promise an effective strategy to fight various diseases. More recently, self-assembled peptide nanoparticles (SAPNs) have attracted considerable attention in the field of vaccine design due to their multivalency. In this study, a SAPN nanovaccine was designed using various immunoinformatics methods. High-ranked epitopes were chosen from a number of antigens, including Leishmania-specific hypothetical protein (LiHy), Leishmania-specific antigenic protein (LSAP), histone H1, and sterol 24-c-methyltransferase (SMT). To facilitate the oligomerization process, pentameric and trimeric coiled-coil domains were employed. RpfE, a resuscitation-promoting factor of Mycobacterium tuberculosis, was added to induce strong immune responses. Pentameric and trimeric coiled-coil domains as well as eight immunodominant epitopes from antigenic proteins of Leishmania infantum, the causative agent of VL, were joined together using appropriate linkers. High-quality 3D structure of monomeric and oligomeric structures followed by refinement and validation processes demonstrated that the designed nanovaccine could be considered to be a promising medication against the parasite; however, experimental validation is essential to confirm the effectiveness of the nanovaccine.
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12
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Rostamizadeh L, Molavi O, Rashid M, Ramazani F, Baradaran B, Lavasanaifar A, Lai R. Recent advances in cancer immunotherapy: Modulation of tumor microenvironment by Toll-like receptor ligands. BIOIMPACTS : BI 2022; 12:261-290. [PMID: 35677663 PMCID: PMC9124882 DOI: 10.34172/bi.2022.23896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 11/29/2021] [Accepted: 12/04/2021] [Indexed: 12/18/2022]
Abstract
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Immunotherapy is considered a promising approach for cancer treatment. An important strategy for cancer immunotherapy is the use of cancer vaccines, which have been widely used for cancer treatment. Despite the great potential of cancer vaccines for cancer treatment, their therapeutic effects in clinical settings have been limited. The main reason behind the lack of significant therapeutic outcomes for cancer vaccines is believed to be the immunosuppressive tumor microenvironment (TME). The TME counteracts the therapeutic effects of immunotherapy and provides a favorable environment for tumor growth and progression. Therefore, overcoming the immunosuppressive TME can potentially augment the therapeutic effects of cancer immunotherapy in general and therapeutic cancer vaccines in particular. Among the strategies developed for overcoming immunosuppression in TME, the use of toll-like receptor (TLR) agonists has been suggested as a promising approach to reverse immunosuppression. In this paper, we will review the application of the four most widely studied TLR agonists including agonists of TLR3, 4, 7, and 9 in cancer immunotherapy.
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Affiliation(s)
- Leila Rostamizadeh
- Department of Molecular Medicine, Faculty of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ommoleila Molavi
- Biotechnology Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohsen Rashid
- Department of Molecular Medicine, Faculty of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Ramazani
- Department of Molecular Medicine, Faculty of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Behzad Baradaran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Afsaneh Lavasanaifar
- Faculty of Pharmacy and Pharmaceutical Science, University of Alberta, Edmonton, Canada
| | - Raymond Lai
- Department of Laboratory Medicine & Pathology, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Canada
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13
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García MM, Molina-Álvarez M, Rodríguez-Rivera C, Paniagua N, Quesada E, Uranga JA, Rodríguez-Franco MI, Pascual D, Goicoechea C. Antinociceptive and modulatory effect of pathoplastic changes in spinal glia of a TLR4/CD14 blocking molecule in two models of pain in rat. Biomed Pharmacother 2022; 150:112986. [PMID: 35462333 DOI: 10.1016/j.biopha.2022.112986] [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: 02/08/2022] [Revised: 04/02/2022] [Accepted: 04/14/2022] [Indexed: 11/02/2022] Open
Abstract
The role of spinal glia in the development and maintenance of chronic pain has become over the last years a subject of increasing interest. In this regard, toll-like receptor 4 (TLR4) signaling has been proposed as a major trigger mechanism. Hence, in this study we explored the implications of TLR4 inhibition in the periphery and primarily in the CNS, focusing on the impact this inhibition renders in pain development and glia activation in the dorsal horn in two models of pain. Making use of a synthetic cluster of differentiation 14 (CD14)/TLR4 antagonist, the effect of TLR4 blockade on tactile allodynia and heat hyperalgesia was evaluated in osteoarthritic and postoperative rat models. An in vitro parallel artificial membrane permeation assay was performed to determine the proneness of the drug to permeate the blood-brain barrier prior to systemic and central administration. Findings suggest a dominant role of peripheral TLR4 in the model of incisional pain, whilst both peripheral and central TLR4 seem to be responsible for osteoarthritic pain. That is, central and peripheral TLR4 may be differently involved in the etiopathology of diverse types of pain what potentially seems a promising approach in the management of pain.
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Affiliation(s)
- Miguel M García
- Area of Pharmacology and Nutrition and Bromatology, Department of Basic Health Sciences, School of Health Sciences, Universidad Rey Juan Carlos, High Performance Experimental Pharmacology Research Group, Universidad Rey Juan Carlos (PHARMAKOM), Madrid, Spain; Unidad Asociada I+D+i Instituto de Química Médica (IQM-CSIC)-URJC, Madrid, Spain
| | - Miguel Molina-Álvarez
- Area of Pharmacology and Nutrition and Bromatology, Department of Basic Health Sciences, School of Health Sciences, Universidad Rey Juan Carlos, High Performance Experimental Pharmacology Research Group, Universidad Rey Juan Carlos (PHARMAKOM), Madrid, Spain; Unidad Asociada I+D+i Instituto de Química Médica (IQM-CSIC)-URJC, Madrid, Spain
| | - Carmen Rodríguez-Rivera
- Area of Pharmacology and Nutrition and Bromatology, Department of Basic Health Sciences, School of Health Sciences, Universidad Rey Juan Carlos, High Performance Experimental Pharmacology Research Group, Universidad Rey Juan Carlos (PHARMAKOM), Madrid, Spain; Unidad Asociada I+D+i Instituto de Química Médica (IQM-CSIC)-URJC, Madrid, Spain
| | - Nancy Paniagua
- Area of Pharmacology and Nutrition and Bromatology, Department of Basic Health Sciences, School of Health Sciences, Universidad Rey Juan Carlos, High Performance Experimental Pharmacology Research Group, Universidad Rey Juan Carlos (PHARMAKOM), Madrid, Spain; Unidad Asociada I+D+i Instituto de Química Médica (IQM-CSIC)-URJC, Madrid, Spain
| | - Ernesto Quesada
- Instituto de Química Médica, Consejo Superior de Investigaciones Científicas (IQM-CSIC), Madrid, Spain; Unidad Asociada I+D+i Instituto de Química Médica (IQM-CSIC)-URJC, Madrid, Spain
| | - José Antonio Uranga
- Area of Histology, Department of Basic Health Sciences, School of Health Sciences, Universidad Rey Juan Carlos, High Performance Research Group in Physiopathology and Pharmacology of the Digestive System, Universidad Rey Juan Carlos (NEUGUT), Madrid, Spain
| | | | - David Pascual
- Area of Pharmacology and Nutrition and Bromatology, Department of Basic Health Sciences, School of Health Sciences, Universidad Rey Juan Carlos, High Performance Experimental Pharmacology Research Group, Universidad Rey Juan Carlos (PHARMAKOM), Madrid, Spain; Unidad Asociada I+D+i Instituto de Química Médica (IQM-CSIC)-URJC, Madrid, Spain.
| | - Carlos Goicoechea
- Area of Pharmacology and Nutrition and Bromatology, Department of Basic Health Sciences, School of Health Sciences, Universidad Rey Juan Carlos, High Performance Experimental Pharmacology Research Group, Universidad Rey Juan Carlos (PHARMAKOM), Madrid, Spain; Unidad Asociada I+D+i Instituto de Química Médica (IQM-CSIC)-URJC, Madrid, Spain
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14
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Yiyi Fuzi Baijiang Decoction Alleviates Ulcerative Colitis Partly by Regulating TLR4-Mediated PI3K/Akt and NF- κB Pathways. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:8780514. [PMID: 35211182 PMCID: PMC8863463 DOI: 10.1155/2022/8780514] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 01/12/2022] [Indexed: 12/28/2022]
Abstract
Yiyi Fuzi Baijiang Decoction (YFBD), an ancient prescription developed by the ancient Chinese physician, Zhang Zhongjing, has shown remarkable effects in treating ulcerative colitis (UC). However, there are few studies on its mechanism. This study was designed to explore the potential mechanism of YFBD in treating UC. The principal ingredients of YFBD were analyzed using high-performance liquid chromatography (HPLC). Dextran sulfate sodium- (DSS-) induced mice and lipopolysaccharide- (LPS-) stimulated RAW264.7 cells were used in the study. The body weight and disease activity index (DAI) of mice were recorded and analyzed for 10 days. After sacrifice, the colonic tissues were harvested. The colon length was measured, and the histopathological changes were observed by hematoxylin and eosin staining. The levels of inflammatory cytokines in mice colons and RAW246.7 cells were determined by real-time quantitative PCR and immunofluorescence. The effects of YFBD on the TLR4-mediated PI3K/Akt and NF-κB pathways were determined by western blot analysis. HPLC identified five compounds in YFBD: chlorogenic acid, caffeic acid, benzoylmesaconine, benzoyl aconitine, and quercetin. YFBD alleviated weight loss, colon shortening, and colonic histopathological lesion in mice. Meanwhile, it decreased the DAI and histological score of mice with UC. In addition, YFBD remarkably decreased the levels of interleukin- (IL-) 6, IL-1β, and tumor necrosis factor (TNF)-α in the colons of DSS-induced mice and LPS-stimulated RAW246.7 cells. Furthermore, the expression of key proteins in TLR4-mediated PI3K/Akt and NF-κB pathways significantly decreased with YFBD treatment. In conclusion, YFBD had protective effects on mice with UC, which was in part related to its anti-inflammatory effects and downregulation of TLR4-mediated PI3K/Akt and NF-κB pathways.
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15
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Al-Taie M, Baban R, Hamed M. The correlation between serum resistin and toll-like receptor-4 with insulin resistance in hypertensive subjects with or without type 2 diabetes mellitus. BAGHDAD JOURNAL OF BIOCHEMISTRY AND APPLIED BIOLOGICAL SCIENCES 2021. [DOI: 10.47419/bjbabs.v2i04.70] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Background: The most chronic disease prevalence in the Iraqi population are type-2 diabetes mellitus (T2DM) and hypertension (HT). One of the important causes of these chronic diseases is obesity. Resistin (RETN) is a major link between obesity and insulin resistance (IR) or T2DM (which induces IR). The action of RETN on IR is mediated by Toll-like receptor-4 (TLR4). TLR4 is a putative RETN receptor that has been suggested to participate in RETN-inducing inflammation and IR.
Objectives: To study the association between serum RETN/TLR4 and IR in hypertensive patients with or without T2DM subjects.
Methods: This cross-sectional study was conducted on 120 men that classified into four different groups. These groups consist of the following: 30 apparently control group, 30 patients with hypertension, 30 patients with T2DM but without HT and 30 hypertensive patients with T2DM. For all the subjects, serum RETN, TLR4 and serum insulin was estimated by using the ELISA technique.
Results: Our results showed that mean levels of the serum RETN and TLR4 were significantly elevated in all patient groups when compared with the control group. Also, a positive correlation between serum RETN and TLR4 was found in hypertensive patients with T2DM patients.
Conclusions: Serum RETN and TLR4 were higher in all patient groups when compared with the control group. In addition, a positive correlation between RETN and IR in all study groups was noted. Then, we suggested a close association between RETN and TLR4 and their positive correlations with IR.
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Wang Z, Mu W, Gong Z, Liu G, Yang J. Meta-substituted piperlongumine derivatives attenuate inflammation in both RAW264.7 macrophages and a mouse model of colitis. Bioorg Chem 2021; 117:105465. [PMID: 34775205 DOI: 10.1016/j.bioorg.2021.105465] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 10/28/2021] [Accepted: 10/30/2021] [Indexed: 12/15/2022]
Abstract
Piperlongumine (PL) has been showed to have multiple pharmacological activities. In this study, we reported the synthesis of three series of PL derivatives, and evaluation of their anti-inflammatory effects in both lipopolysaccharide (LPS)-induced Raw264.7 macrophages and a dextran sulfate sodium (DSS)-induced mouse model of colitis. Our results presented that two meta-substituent containing derivatives 1-3 and 1-6, in which γ-butyrolactam replaced α,β-unsaturated δ-valerolactam ring of PL, displayed low cytotoxicity and effective anti-inflammatory activity. Molecular docking also showed that the meta-substituted derivative, compared with the corresponding ortho- or para-substituted derivative, had significant interactions with the amino acid residues of CD14, which was the core receptors recognizing LPS. In vitro and in vivo studies, 1-3 and 1-6 could inhibit the expression of pro-inflammatory cytokines, and the excessive production of reactive nitrogen species and reactive oxygen species. Oral administration of 100 mg/kg/day of 1-3 or 1-6 alleviated the severity of clinical symptoms of colitis in mice, and significantly reduced the colonic tissue damage to protect the colonic tissue from the DSS-induced colitis. These results suggested that meta-substituted derivatives 1-3 and 1-6 were potential anti-inflammatory agents, which may lead to future pharmaceutical development.
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Affiliation(s)
- Ziqing Wang
- School of Pharmaceutical Sciences, Liaocheng University, 1 Hunan Street, Liaocheng, Shandong 252059, China
| | - Wenwen Mu
- School of Pharmaceutical Sciences, Liaocheng University, 1 Hunan Street, Liaocheng, Shandong 252059, China
| | - Zhaotang Gong
- School of Pharmaceutical Sciences, Liaocheng University, 1 Hunan Street, Liaocheng, Shandong 252059, China
| | - Guoyun Liu
- School of Pharmaceutical Sciences, Liaocheng University, 1 Hunan Street, Liaocheng, Shandong 252059, China.
| | - Jie Yang
- School of Pharmaceutical Sciences, Liaocheng University, 1 Hunan Street, Liaocheng, Shandong 252059, China.
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Engineering a multi-epitope vaccine candidate against Leishmania infantum using comprehensive Immunoinformatics methods. Biologia (Bratisl) 2021; 77:277-289. [PMID: 34866641 PMCID: PMC8628819 DOI: 10.1007/s11756-021-00934-3] [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: 08/18/2021] [Accepted: 10/09/2021] [Indexed: 10/31/2022]
Abstract
Visceral leishmaniasis (VL) is a severe disease with particular endemicity in over 80 countries worldwide. There is no approved human vaccine against VL in the market. This study was aimed at designing and evaluation of a multimeric vaccine candidate against Leishmania infantum through utilization of helper T lymphocyte (HTL) and cytotoxic T lymphocyte (CTL) immunodominant proteins from histone H1, KMP11, LACK and LeIF antigens. Top-ranked mouse MHC-I, MHC-II binders and CTL epitopes were predicted and joined together via spacers. Also, a TLR-4 agonist (RS-09 synthetic protein) and His-tag were added to the N- and C-terminal of the vaccine sequence, respectively. The final chimeric vaccine had a length of 184 amino acids with a molecular weight of 18.99 kDa. Physico-chemical features showed a soluble, highly-antigenic and non-allergenic candidate. Secondary and tertiary structures were predicted, and subsequent analyses confirmed the construct stability that was capable to properly interact with TLR-4/MD2 receptor. Immunoinformatics simulation displayed potent stimulation of T cell immune responses, with particular rise in IFN-γ, upon vaccination with the proposed multi-epitope candidate. In conclusion, immunoinformatics data demonstrated a highly antigenic vaccine candidate in mouse, which could develop considerable levels clearance mechanisms and other components of cellular immune profile, and can be directed for VL prophylactic purposes. Supplementary Information The online version contains supplementary material available at 10.1007/s11756-021-00934-3.
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18
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Zhou J, Que Y, Pan L, Li X, Zhu C, Jin L, Li S. Supervillin Contributes to LPS-induced Inflammatory Response in THP-1 Cell-derived Macrophages. Inflammation 2021; 45:356-371. [PMID: 34480249 DOI: 10.1007/s10753-021-01551-7] [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: 04/23/2021] [Accepted: 08/18/2021] [Indexed: 10/20/2022]
Abstract
Supervillin (SVIL) is an actin-binding and membrane-associated protein, which belongs to villin/gelsolin family. It has been reported that SVIL was involved in the regulation of macrophages' movement and lipopolysaccharide (LPS) increased the SVIL mRNA expression in neutrophils, but the underlying mechanisms remain unknown. This work investigated the underlying molecular mechanisms of LPS regulating SVIL expression in macrophages and hence the possible role of SVIL in LPS-induced inflammation. We found that in THP-1-derived macrophages, LPS obviously increased SVIL mRNA and protein expression. Inhibition of TLR4 by Resatorvid (Res) remarkably reversed the LPS-induced SVIL expression. Additionally, inhibition of ERK1/2 signaling pathway (by U0126 or GDC-0994) and NF-κB (by BAY) significantly reduced the LPS-induced SVIL expression. Interestingly, down-regulation of SVIL by SVIL-specific shRNAs significantly attenuated the expression of IL-6, IL-1β & TNF-α induced by LPS at both mRNA and protein levels. Furthermore, we also observed that SVIL knockdown decreased the proportion of cells in G2/M phase and increased the proportion of cells in S & G0-1 phase of THP-1 derived macrophages, but did not influence the cell viability. Taken together, we demonstrated that LPS induced the expression of SVIL via activating TLR4/NF-κB and ERK1/2 MAPK pathways, and SVIL participated in the inflammatory response of LPS-induced IL-6, IL-1β and TNF-α upregulation in macrophages.
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Affiliation(s)
- Jun Zhou
- Department of Pharmacology, Nanjing Medical University, Longmian Dadao 101, Nanjing, 211166, China
| | - Yuhui Que
- Department of Pharmacology, Nanjing Medical University, Longmian Dadao 101, Nanjing, 211166, China
| | - Lihua Pan
- Department of Pharmacology, Nanjing Medical University, Longmian Dadao 101, Nanjing, 211166, China
| | - Xu Li
- Department of Pharmacology, Nanjing Medical University, Longmian Dadao 101, Nanjing, 211166, China
| | - Chao Zhu
- Department of Pharmacology, Nanjing Medical University, Longmian Dadao 101, Nanjing, 211166, China
| | - Lai Jin
- Department of Pharmacology, Nanjing Medical University, Longmian Dadao 101, Nanjing, 211166, China.
| | - Shengnan Li
- Department of Pharmacology, Nanjing Medical University, Longmian Dadao 101, Nanjing, 211166, China.
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19
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Ferreira-Gomes J, Garcia MM, Nascimento D, Almeida L, Quesada E, Castro-Lopes JM, Pascual D, Goicoechea C, Neto FL. TLR4 Antagonism Reduces Movement-Induced Nociception and ATF-3 Expression in Experimental Osteoarthritis. J Pain Res 2021; 14:2615-2627. [PMID: 34466029 PMCID: PMC8403032 DOI: 10.2147/jpr.s317877] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 07/29/2021] [Indexed: 01/13/2023] Open
Abstract
Introduction Toll-like receptor 4 (TLR4) is a pattern recognition receptor involved in the detection of pathogen-associated molecular patterns (PAMPs), but also a "danger-sensing" receptor that recognizes host-derived endogenous molecules called damage-associated molecular patterns (DAMPs). The involvement of TLR4 in rheumatic diseases is becoming evident, as well as its potential role as a target for therapeutic intervention. Moreover, increasing evidence also suggests that TLR4 is implicated in chronic pain states. Thus, in this study, we evaluated whether a systemic administration of a synthetic antagonist of TLR4 (TLR4-A1) could decrease nociception and cartilage degradation in experimental osteoarthritis (OA). Furthermore, as the activation transcription factor (ATF)-3 serves as a negative regulator for TLR4-stimulated inflammatory response, we also evaluated the effect of TLR4 inhibition on ATF-3 expression in primary afferent neurons at the dorsal root ganglia (DRG). Methods OA was induced in adult male Wistar rats through an intra-articular injection of 2 mg of sodium mono-iodoacetate (MIA) into the left knee. From days 14 to 28 after OA induction, animals received an intraperitoneal injection of either TLR4-A1 (10 mg/kg) or vehicle. Movement- and loading-induced nociception was evaluated in all animals, by the Knee-Bend and CatWalk tests, before and at several time-points after TLR4-A1/vehicle administration. Immunofluorescence for TLR4 and ATF-3 was performed in L3-L5 DRG. Knee joints were processed for histopathological evaluation. Results Administration of TLR4-A1 markedly reduced movement-induced nociception in OA animals, particularly in the Knee-Bend test. Moreover, the increase of ATF-3 expression observed in DRG of OA animals was significantly reduced by TLR4-A1. However, no effect was observed in cartilage loss nor in the neuronal cytoplasmic expression of TLR4 upon antagonist administration. Conclusion The TLR4 antagonist administration possibly interrupts the TLR4 signalling cascade, thus decreasing the neurotoxic environment at the joint, which leads to a reduction in ATF-3 expression and in nociception associated with experimental OA.
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Affiliation(s)
- Joana Ferreira-Gomes
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Departamento de Biomedicina, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Miguel M Garcia
- Area of Pharmacology, Nutrition and Bromatology, Department of Basic Health Sciences, Universidad Rey Juan Carlos, Unidad Asociada I+D+i Instituto de Química Médica (IQM) CSIC-URJC, Madrid, Spain.,High Performance Experimental Pharmacology research group, Universidad Rey Juan Carlos (PHARMAKOM), Alcorcón, Spain.,Grupo de Excelencia Investigadora URJC-Banco de Santander-Grupo multidisciplinar de investigación y tratamiento del dolor (i+DOL), Alcorcón, Spain
| | - Diana Nascimento
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Departamento de Biomedicina, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Lígia Almeida
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Departamento de Biomedicina, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Ernesto Quesada
- Area of Pharmacology, Nutrition and Bromatology, Department of Basic Health Sciences, Universidad Rey Juan Carlos, Unidad Asociada I+D+i Instituto de Química Médica (IQM) CSIC-URJC, Madrid, Spain.,Grupo de Excelencia Investigadora URJC-Banco de Santander-Grupo multidisciplinar de investigación y tratamiento del dolor (i+DOL), Alcorcón, Spain
| | - José Manuel Castro-Lopes
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Departamento de Biomedicina, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - David Pascual
- Area of Pharmacology, Nutrition and Bromatology, Department of Basic Health Sciences, Universidad Rey Juan Carlos, Unidad Asociada I+D+i Instituto de Química Médica (IQM) CSIC-URJC, Madrid, Spain.,High Performance Experimental Pharmacology research group, Universidad Rey Juan Carlos (PHARMAKOM), Alcorcón, Spain.,Grupo de Excelencia Investigadora URJC-Banco de Santander-Grupo multidisciplinar de investigación y tratamiento del dolor (i+DOL), Alcorcón, Spain
| | - Carlos Goicoechea
- Area of Pharmacology, Nutrition and Bromatology, Department of Basic Health Sciences, Universidad Rey Juan Carlos, Unidad Asociada I+D+i Instituto de Química Médica (IQM) CSIC-URJC, Madrid, Spain.,High Performance Experimental Pharmacology research group, Universidad Rey Juan Carlos (PHARMAKOM), Alcorcón, Spain.,Grupo de Excelencia Investigadora URJC-Banco de Santander-Grupo multidisciplinar de investigación y tratamiento del dolor (i+DOL), Alcorcón, Spain
| | - Fani Lourença Neto
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Departamento de Biomedicina, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
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Zhang X, Wang H, Wang Y, Li H, Wu S, Gao J, Zhang T, Xie J, Wang X. Nalmefene non-enantioselectively targets myeloid differentiation protein 2 and inhibits toll-like receptor 4 signaling: wet-lab techniques and in silico simulations. Phys Chem Chem Phys 2021; 23:12260-12269. [PMID: 34013938 DOI: 10.1039/d1cp00237f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nalmefene is an opiate derivative having a similar structure to naltrexone. Recent evidence suggests that nalmefene, acting as the innate immune protein toll-like receptor 4 (TLR4) antagonist, effectively reduces the injury of lung ischemia-reperfusion and prevents neuroinflammation. However, the molecular recognition mechanism, especially the enantioselectivity, of nalmefene by the innate immune receptor is not well understood. Herein in vitro assays and in silico simulations were performed to dissect the innate immune recognition of nalmefene at the atomic, molecular, and cellular levels. Biophysical binding experiments and molecular dynamic simulations provide direct evidence that (-)-nalmefene and (+)-nalmefene bind to the hydrophobic cavity of myeloid differentiation protein 2 (MD-2) and behave similarly, which is primarily driven by hydrophobic interactions. The inhibition activity and the calculated binding free energies show that no enantioselectivity was observed during the interaction of nalmefene with MD-2 as well as the inhibition of TLR4 signaling. Interestingly, nalmefene showed ∼6 times better TLR4 antagonisic activity than naltrexone, indicating that the bioisosteric replacement with the methylene group is critical for the molecular recognition of nalmefene by MD-2. In all, this study provides molecular insight into the innate immune recognition of nalmefene, which demonstrates that nalmefene is non-enantioselectively sensed by MD-2.
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Affiliation(s)
- Xiaozheng Zhang
- Department of Biochemistry and Molecular Biology, Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, Shanxi 030001, China.
| | - Hongshuang Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
| | - Yibo Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
| | - Hongyuan Li
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
| | - Siru Wu
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and Department of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China.
| | - Jingwei Gao
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and Department of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China.
| | - Tianshu Zhang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
| | - Jun Xie
- Department of Biochemistry and Molecular Biology, Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, Shanxi 030001, China.
| | - Xiaohui Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and Department of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China.
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21
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Structure-activity relationship study of dihydroartemisinin C-10 hemiacetal derivatives as Toll-like receptor 4 antagonists. Bioorg Chem 2021; 114:105107. [PMID: 34175717 DOI: 10.1016/j.bioorg.2021.105107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 06/15/2021] [Accepted: 06/17/2021] [Indexed: 12/23/2022]
Abstract
Dihydroartemisinin (DHA), a natural product isolated from the traditional Chinese herb Artemisia annua and one of the clinical frontline drugs against malarial infections, has recently been discovered as a Toll-like Receptor 4 (TLR4) antagonist. However, the TLR4 antagonistic activity of DHA is modest and it exhibits cellular toxicity. In this work, the structure-activity relationship (SAR) of DHA as TLR4 antagonist was explored. Since destroying the sesquiterpene endoperoxide scaffold substantially compromised the TLR4 antagonistic activity and molecular dynamics analysis showed that the C-10 hydroxyl group formed a hydrogen bond with E72 of myeloid differentiation factor 2 (MD2) to prevent it moving deeper into MD2, SAR of DHA was focused on the C-10 hemiacetal position. With extending the length of the linear alkane chain at C10 position, the TLR4 antagonistic activity of DHA analogs increased first and then decreased with the best TLR4 antagonism occurring at the length of the carbon chain of 3-4 carbons. In contrast, the cellular toxicity of DHA analogs was raised with the increasing length of the linear alkane chain. The TLR4 antagonistic activity of DHA derivatives with substituted halogen as the terminal functional group decreased with the decrease of electronegativity of the substituted halogen, which implies the electron-rich functional group at the end of the alkane chain appears preferred. Therefore, DHA derivative 2k with alkynyl as the end functional group, exhibited 14 times more potent TLR4 antagonistic activity than DHA. Moreover, 2k showed less cellular toxicity than DHA. Cellular signaling characterizations indicated that 2k inhibited LPS-induced TLR4 dimerization and endocytosis and suppressed LPS-induced NF-κB but not MAPKs activation, culminating in blocking LPS-induced TLR4 signaling downstream pro-inflammatory factors NO and IL-1β. Further, 2k was active in vivo; it significantly increased and prolonged morphine analgesia. Collectively, this study provides a structural guidance to reposition DHA derivatives as TLR4 antagonists.
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22
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Wang YW, Wu YH, Zhang JZ, Tang JH, Fan RP, Li F, Yu BY, Kou JP, Zhang YY. Ruscogenin attenuates particulate matter-induced acute lung injury in mice via protecting pulmonary endothelial barrier and inhibiting TLR4 signaling pathway. Acta Pharmacol Sin 2021; 42:726-734. [PMID: 32855531 PMCID: PMC8114925 DOI: 10.1038/s41401-020-00502-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 07/31/2020] [Indexed: 12/15/2022] Open
Abstract
The inhalation of particulate matter (PM) is closely related to respiratory damage, including acute lung injury (ALI), characterized by inflammatory fluid edema and disturbed alveolar-capillary permeability. Ruscogenin (RUS), the main active ingredient in the traditional Chinese medicine Ophiopogonis japonicus, has been found to exhibit anti-inflammatory activity and rescue LPS-induced ALI. In this study, we investigated whether and how RUS exerted therapeutic effects on PM-induced ALI. RUS (0.1, 0.3, 1 mg·kg-1·d-1) was orally administered to mice prior to or after intratracheal instillation of PM suspension (50 mg/kg). We showed that RUS administration either prior to or after PM challenge significantly attenuated PM-induced pathological injury, lung edema, vascular leakage and VE-cadherin expression in lung tissue. RUS administration significantly decreased the levels of cytokines IL-6 and IL-1β, as well as the levels of NO and MPO in both bronchoalveolar lavage fluid (BALF) and serum. RUS administration dose-dependently suppressed the phosphorylation of NF-κB p65 and the expression of TLR4 and MyD88 in lung tissue. Furthermore, TLR4 knockout partly diminished PM-induced lung injury, and abolished the protective effects of RUS in PM-instilled mice. In conclusion, RUS effectively alleviates PM-induced ALI probably by inhibition of vascular leakage and TLR4/MyD88 signaling. TLR4 might be crucial for PM to initiate pulmonary lesion and for RUS to exert efficacy against PM-induced lung injury.
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Affiliation(s)
- Yu-Wei Wang
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Yun-Hao Wu
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Jia-Zhi Zhang
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Jia-Hui Tang
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Rui-Ping Fan
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Fang Li
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Bo-Yang Yu
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Jun-Ping Kou
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
| | - Yuan-Yuan Zhang
- State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
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23
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Palmer C, Facchini FA, Jones RP, Neumann F, Peri F, Pirianov G. Synthetic glycolipid-based TLR4 antagonists negatively regulate TRIF-dependent TLR4 signalling in human macrophages. Innate Immun 2021; 27:275-284. [PMID: 33858242 PMCID: PMC8054148 DOI: 10.1177/17534259211005840] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
TLRs, including TLR4, play a crucial role in inflammatory-based diseases, and TLR4 has been identified as a therapeutic target for pharmacological intervention. In previous studies, we investigated the potential of FP7, a novel synthetic glycolipid active as a TLR4 antagonist, to inhibit haematopoietic and non-haematopoietic MyD88-dependent TLR4 pro-inflammatory signalling. The main aim of this study was to investigate the action of FP7 and its derivative FP12 on MyD88-independent TLR4 signalling in THP-1 derived macrophages. Western blotting, Ab array and ELISA approaches were used to explore the effect of FP7 and FP12 on TRIF-dependent TLR4 functional activity in response to LPS and other endogenous TLR4 ligands in THP-1 macrophages. A different kinetic in the inhibition of endotoxin-driven TBK1, IRF3 and STAT1 phosphorylation was observed using different LPS chemotypes. Following activation of TLR4 by LPS, data revealed that FP7 and FP12 inhibited TBK1, IRF3 and STAT1 phosphorylation which was associated with down-regulation IFN-β and IP-10. Specific blockage of the IFN type one receptor showed that these novel molecules inhibited TRIF-dependent TLR4 signalling via IFN-β pathways. These results add novel information on the mechanism of action of monosaccharide FP derivatives. The inhibition of the TRIF-dependent pathway in human macrophages suggests potential therapeutic uses for these novel TLR4 antagonists in pharmacological interventions on inflammatory diseases.
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Affiliation(s)
- Charys Palmer
- School of Life Sciences, Anglia Ruskin University, UK
| | - Fabio A Facchini
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Italy
| | | | | | - Francesco Peri
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Italy
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24
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Yang FM, Fan D, Yang XQ, Zhu FH, Shao MJ, Li Q, Liu YT, Lin ZM, Cao SQ, Tang W, He SJ, Zuo JP. The artemisinin analog SM934 alleviates dry eye disease in rodent models by regulating TLR4/NF-κB/NLRP3 signaling. Acta Pharmacol Sin 2021; 42:593-603. [PMID: 32747720 PMCID: PMC8114933 DOI: 10.1038/s41401-020-0484-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 07/15/2020] [Indexed: 01/22/2023] Open
Abstract
Dry eye disease (DED) is a multifactorial disorder of the tears and ocular surface characterized by manifestations of dryness and irritation. Although the pathogenesis is not fully illuminated, it is recognized that inflammation has a prominent role in the development and deterioration of DED. β-aminoarteether maleate (SM934) is a water-soluble artemisinin derivative with anti-inflammatory and immunosuppressive activities. In this study, we established scopolamine hydrobromide (SCOP)-induced rodent model as well as benzalkonium chloride (BAC)-induced rat model to investigate the therapeutic potential of SM934 for DED. We showed that topical application of SM934 (0.1%, 0.5%) significantly increased tear secretion, maintained the number of conjunctival goblet cells, reduced corneal damage, and decreased the levels of inflammatory mediators (TNF-α, IL-6, IL-10, or IL-1β) in conjunctiva in SCOP-induced and BAC-induced DED models. Moreover, SM934 treatment reduced the accumulation of TLR4-expressing macrophages in conjunctiva, and suppressed the expression of inflammasome components, i.e., myeloid differentiation factor88 (MyD88), Nod-like receptor protein 3 (NLRP3), apoptosis-associated speck-like protein containing CARD (ASC), and cleaved caspase 1. In LPS-treated RAW 264.7 cells, we demonstrated that pretreatment with SM934 (10 μM) impeded the upregulation of TLR4 and downstream NF-κB/NLRP3 signaling proteins. Collectively, artemisinin analog SM934 exerts therapeutic benefits on DED by simultaneously reserving the structural integrity of ocular surface and preventing the corneal and conjunctival inflammation, suggested a further application of SM934 in ophthalmic therapy, especially for DED.
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Affiliation(s)
- Fang-Ming Yang
- Laboratory of Immunology and Virology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Di Fan
- Laboratory of Immunology and Virology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Xiao-Qian Yang
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Feng-Hua Zhu
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Mei-Juan Shao
- Laboratory of Immunology and Virology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Qian Li
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Yu-Ting Liu
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ze-Min Lin
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Shi-Qi Cao
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wei Tang
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shi-Jun He
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jian-Ping Zuo
- Laboratory of Immunology and Virology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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25
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Chen G, Liu Y, Xu Y, Zhang M, Guo S, Zhang G. Isoimperatorin exerts anti-inflammatory activity by targeting the LPS-TLR4/MD-2-NF-κB pathway. EUR J INFLAMM 2021. [DOI: 10.1177/20587392211000573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Isoimperatorin (QHS) is a phytoconstituent found in the methanolic extracts obtained from the roots of Angelica dahurica, which contains anti-inflammatory, anti-bacterial, analgesic, anti-tumor, and vasodilatory activities. QHS possesses potent antagonistic activity against lipopolysaccharide (LPS)-induced inflammation; however, the mechanism of action remains unclear. In this study, we investigated the anti-inflammatory effect of QHS and explored the underlying mechanisms. The QHS was purchased from Jiangsu Yongjian Pharmaceutical Co., Ltd. (Jiangsu, China). We performed MTT assay, real-time PCR, ELISA, and western blotting experiments to assess the anti-inflammatory activity and the possible mechanism of QHS in vitro. Molecular docking was performed to study the binding of QHS and myeloid differentiation protein-2 (MD-2) and elucidate the possible anti-inflammatory mechanism. QHS had no significant effect on cell viability. Moreover, pre-treatment with QHS significantly decreased the release of inflammatory cytokines and mediators including NO, TNF-α, IL-6, and IL-1β. In addition, real-time PCR showed that QHS decreased the mRNA expressions of iNOS, COX-2 TNF-α, IL-6, and IL-1β. Western blotting indicated that QHS could inhibit the expression of the proteins associated with the LPS-TLR4/MD-2-NF-κB signaling pathway. Lastly, molecular docking revealed a possible binding mechanism between QHS and MD-2. QHS exhibited anti-inflammatory activity when combined with MD-2, regulating the LPS-TLR4/MD-2-NF-κB signaling pathway, and inhibiting the release and expression of inflammatory cytokines and mediators. Furthermore, QHS can be used as a potential TLR4 antagonist, which blocks MD-2 binding, for treating inflammatory responses induced by LPS.
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Affiliation(s)
- Guirong Chen
- 967th Hospital of the Joint Logistics Support Force of the Chinese People’s Liberation Army, Dalian, Liaoning, China
- Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
| | - Yunong Liu
- Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
| | - Yubin Xu
- Taizhou Central Hospital (Taizhou University Hospital), Taizhou, Zhejiang, China
| | - Mingbo Zhang
- Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
| | - Song Guo
- Department of Computer Application, Shenyang Sport University, Shenyang, Liaoning, China
| | - Gang Zhang
- State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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26
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Zhang L, Wei X, Zhang R, Koci M, Si D, Ahmad B, Guo H, Hou Y. C-Terminal Amination of a Cationic Anti-Inflammatory Peptide Improves Bioavailability and Inhibitory Activity Against LPS-Induced Inflammation. Front Immunol 2021; 11:618312. [PMID: 33613547 PMCID: PMC7892475 DOI: 10.3389/fimmu.2020.618312] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 12/15/2020] [Indexed: 12/05/2022] Open
Abstract
Lipopolysaccharide (LPS) has been implicated as a major cause of inflammation and an uncontrolled LPS response increases the risk of localized inflammation and sepsis. While some native peptides are helpful in the treatment of LPS-induced inflammation, the use of these peptides is limited due to their potential cytotoxicity and poor anti-inflammatory activity. Hybridization is an effective approach for overcoming this problem. In this study, a novel hybrid anti-inflammatory peptide that combines the active center of Cathelicidin 2 (CATH2) with thymopentin (TP5) was designed [CTP, CATH2 (1–13)-TP5]. CTP was found to have higher anti-inflammatory effects than its parental peptides through directly LPS neutralization. However, CTP scarcely inhibited the attachment of LPS to cell membranes or suppressed an established LPS-induced inflammation due to poor cellular uptake. The C-terminal amine modification of CTP (CTP-NH2) was then designed based on the hypothesis that C-terminal amidation can enhance the cell uptake by increasing the hydrophobicity of the peptide. Compared with CTP, CTP-NH2 showed enhanced anti-inflammatory activity and lower cytotoxicity. CTP-NH2 not only has strong LPS neutralizing activity, but also can significantly inhibit the LPS attachment and the intracellular inflammatory response. The intracellular anti-inflammatory effect of CTP-NH2 was associated with blocking of LPS binding to the Toll-like receptor 4-myeloid differentiation factor 2 complex and inhibiting the nuclear factor-kappa B pathway. In addition, the anti-inflammatory effect of CTP-NH2 was confirmed using a murine LPS-induced sepsis model. Collectively, these findings suggest that CTP-NH2 could be developed into a novel anti-inflammatory drug. This successful modification provides a design strategy to improve the cellular uptake and anti-inflammatory activity of peptide agents.
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Affiliation(s)
- Lulu Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xubiao Wei
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Rijun Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Matthew Koci
- Prestage Department of Poultry Science, College of Agriculture and Life Sciences, North Carolina State University, Raleigh, NC, United States
| | - Dayong Si
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Baseer Ahmad
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Henan Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yanfei Hou
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
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27
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Zhu L, Huang Y, Hu Y, Tang Q, Zhong Y. Toll-like receptor 4/nuclear factor-kappa B pathway is involved in radicular pain by encouraging spinal microglia activation and inflammatory response in a rat model of lumbar disc herniation. Korean J Pain 2021; 34:47-57. [PMID: 33380567 PMCID: PMC7783850 DOI: 10.3344/kjp.2021.34.1.47] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 11/16/2020] [Accepted: 11/19/2020] [Indexed: 02/06/2023] Open
Abstract
Background Lumbar disc herniation (LDH) is a common cause of radicular pain, but the mechanism is not clear. In this study, we investigated the engagement of toll-like receptor 4 (TLR4) and the nuclear factor-kappa B (NF-κB) in radicular pain and its possible mechanisms. Methods An LDH model was induced by autologous nucleus pulposus (NP) implantation, which was obtained from coccygeal vertebra, then relocated in the lumbar 4/5 spinal nerve roots of rats. Mechanical and thermal pain behaviors were assessed by using von Frey filaments and hotplate test respectively. The protein level of TLR4 and phosphorylated-p65 (p-p65) was evaluated by western blotting analysis and immunofluorescence staining. Spinal microglia activation was evaluated by immunofluorescence staining of specific relevant markers. The expression of pro- and anti-inflammatory cytokines in the spinal dorsal horn was measured by enzyme linked immunosorbent assay. Results Spinal expression of TLR4 and p-NF-κB (p-p65) was significantly increased after NP implantation, lasting up to 14 days. TLR4 was mainly expressed in spinal microglia, but not astrocytes or neurons. TLR4 antagonist TAK242 decreased spinal expression of p-p65. TAK242 or NF-κB inhibitor pyrrolidinedithiocarbamic acid alleviated mechanical and thermal pain behaviors, inhibited spinal microglia activation, moderated spinal inflammatory response manifested by decreasing interleukin (IL)-1β, IL-6, tumor necrosis factor-α expression and increasing IL-10 expression in the spinal dorsal horn. Conclusions The study revealed that TLR4/NF-κB pathway participated in radicular pain by encouraging spinal microglia activation and inflammatory response.
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Affiliation(s)
- Lirong Zhu
- Key Laboratory of Neuroscience, School of Basic Medical Science, Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience and Department of Neurology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yangliang Huang
- Department of Spine Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yuming Hu
- Department of Pathology, Vocational Technical School of Nanhai, Foshan, China
| | - Qian Tang
- Key Laboratory of Neuroscience, School of Basic Medical Science, Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience and Department of Neurology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yi Zhong
- Key Laboratory of Neuroscience, School of Basic Medical Science, Guangzhou Medical University, Guangzhou, China.,Institute of Neuroscience and Department of Neurology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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28
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Rinne M, Mätlik K, Ahonen T, Vedovi F, Zappia G, Moreira VM, Yli-Kauhaluoma J, Leino S, Salminen O, Kalso E, Airavaara M, Xhaard H. Mitoxantrone, pixantrone and mitoxantrone (2-hydroxyethyl)piperazine are toll-like receptor 4 antagonists, inhibit NF-κB activation, and decrease TNF-alpha secretion in primary microglia. Eur J Pharm Sci 2020; 154:105493. [PMID: 32730846 DOI: 10.1016/j.ejps.2020.105493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 07/22/2020] [Accepted: 07/27/2020] [Indexed: 10/23/2022]
Abstract
Toll-like receptor 4 (TLR4) recognizes various endogenous and microbial ligands and is an essential part in the innate immune system. TLR4 signaling initiates transcription factor NF-κB and production of proinflammatory cytokines. TLR4 contributes to the development or progression of various diseases including stroke, neuropathic pain, multiple sclerosis, rheumatoid arthritis and cancer, and better therapeutics are currently sought for these conditions. In this study, a library of 140 000 compounds was virtually screened and a resulting hit-list of 1000 compounds was tested using a cellular reporter system. The topoisomerase II inhibitor mitoxantrone and its analogues pixantrone and mitoxantrone (2-hydroxyethyl)piperazine were identified as inhibitors of TLR4 and NF-κB activation. Mitoxantrone was shown to bind directly to the TLR4, and pixantrone and mitoxantrone (2-hydroxyethyl)piperazine were shown to inhibit the production of proinflammatory cytokines such as tumor necrosis factor alpha (TNFα) in primary microglia. The inhibitory effect on NF-κB activation or on TNFα production was not mediated through cytotoxity at ≤ 1 µM concentration for pixantrone and mitoxantrone (2-hydroxyethyl)piperazine treated cells, as assessed by ATP counts. This study thus identifies a new mechanism of action for mitoxantrone, pixantrone, and mitoxantrone (2-hydroxyethyl)piperazine through the TLR4.
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Affiliation(s)
- Maiju Rinne
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Kert Mätlik
- Institute of Biotechnology, HiLIFE, University of Helsinki, FI-00014 Helsinki, Finland; Department of Pharmacology, Faculty of Medicine, University of Helsinki, FI-00014 Helsinki, Finland
| | - Tiina Ahonen
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Fabio Vedovi
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland; Department of Biomolecular Sciences, University Urbino Carlo Bo, P.zza Rinascimento, 6 61029 Urbino (PU), Italy
| | - Giovanni Zappia
- Department of Biomolecular Sciences, University Urbino Carlo Bo, P.zza Rinascimento, 6 61029 Urbino (PU), Italy
| | - Vânia M Moreira
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland; Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, G4 0RE Glasgow, U.K; Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Coimbra, 3004-548 Coimbra, Portugal; Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal
| | - Jari Yli-Kauhaluoma
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Sakari Leino
- Drug Research Program, Division of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Outi Salminen
- Drug Research Program, Division of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Eija Kalso
- Department of Pharmacology, Faculty of Medicine, University of Helsinki, FI-00014 Helsinki, Finland; Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital. FI-00029 HUS, Finland
| | - Mikko Airavaara
- Institute of Biotechnology, HiLIFE, University of Helsinki, FI-00014 Helsinki, Finland
| | - Henri Xhaard
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland.
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Rattan P, Minacapelli CD, Rustgi V. The Microbiome and Hepatocellular Carcinoma. Liver Transpl 2020; 26:1316-1327. [PMID: 32564483 DOI: 10.1002/lt.25828] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/29/2020] [Accepted: 06/13/2020] [Indexed: 12/14/2022]
Abstract
The human microbiome is a vast and complex system encompassing all of the microbes and their genes that occupy the environmentally exposed surfaces of the human body. The gut microbiota and its associated microbiome play an integral role in mammalian metabolism and immune tolerance as well as in immunocompetence. Disruptions in the human gut microbiome are associated with a cycle of hepatocyte injury and regeneration characteristic of chronic liver disease. The persistence of this inflammation has been shown to induce the accumulation of genetic and epigenetic changes leading to hepatocellular carcinoma (HCC). Therefore, the importance and prognostic influence of the gut microbiome on hepatocarcinogenesis has been increasingly studied in recent years. This review discusses the mechanisms by which imbalances in the gut microbiome disturb the gut-liver axis to impact hepatocarcinogenesis, including disruption of the intestinal barrier, changes in bile acid metabolism, and reduction in tumor-suppressing microRNA. Furthermore, this review summarizes recent advances in potential microbiome-based therapeutic opportunities in HCC.
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Affiliation(s)
- Puru Rattan
- Division of Gastroenterology and Hepatology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ
- Center for Liver Diseases and Masses, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ
| | - Carlos D Minacapelli
- Division of Gastroenterology and Hepatology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ
- Center for Liver Diseases and Masses, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ
| | - Vinod Rustgi
- Division of Gastroenterology and Hepatology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ
- Center for Liver Diseases and Masses, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ
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30
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Naraki K, Rezaee R, Mashayekhi-Sardoo H, Hayes AW, Karimi G. Mangiferin offers protection against deleterious effects of pharmaceuticals, heavy metals, and environmental chemicals. Phytother Res 2020; 35:810-822. [PMID: 32961631 DOI: 10.1002/ptr.6864] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/27/2020] [Accepted: 08/16/2020] [Indexed: 02/06/2023]
Abstract
Mangiferin (MGF) is a polyphenolic C-glucosyl-xanthone extracted from the mango tree (Mangifera indica). MGF has shown diverse effects such as antioxidant, antiapoptotic, radical scavenging, and chelating properties. MGF also has been shown to modulate inflammatory pathways. In this review, we examined and evaluated the literature dealing with the protective effects of MGF against various chemical toxicities. Our literature review indicated that the MGF-induced protective effects against the toxic effects of pharmaceuticals, heavy metals and environmental chemicals were mainly mediated via suppression of lipid peroxidation, oxidative stress (along with enhancement of the antioxidant enzyme), inflammatory factors (TNF-α, IL-6, IL-10, and IL-12), and activation of PI3K/Akt and the MAPK survival signaling pathway.
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Affiliation(s)
- Karim Naraki
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ramin Rezaee
- Clinical Research Unit, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Habibeh Mashayekhi-Sardoo
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - A Wallace Hayes
- College of Public Health, University of South Florida, Tampa, Florida, USA
| | - Gholamreza Karimi
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Pharmaceutical Research Center, Institute of Pharmaceutical Technology, Mashhad University of Medical Sciences, Mashhad, Iran
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31
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Yang Y, Wang D, Li Q, He J, Wang B, Li J, Zhang A. Immune-Enhancing Activity of Aqueous Extracts from Artemisia rupestris L. via MAPK and NF-kB Pathways of TLR4/TLR2 Downstream in Dendritic Cells. Vaccines (Basel) 2020; 8:vaccines8030525. [PMID: 32933167 PMCID: PMC7565461 DOI: 10.3390/vaccines8030525] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/11/2020] [Accepted: 09/11/2020] [Indexed: 12/12/2022] Open
Abstract
Artemisia rupestris L. has long been used as a traditional herbal medicine owing to its immunomodulatory activity. Aqueous extracts of Artemisia rupestris L. (AEAR) contain the main functional component and can activate the maturation of dendritic cells (DCs) and enhance the adaptive immunity as the adjuvant against infections. To explore the underlying mechanism of immunomodulatory activities of AEAR, DCs were produced from bone-marrow cells of mice and the effects of AEAR on cell viability were assessed by the Cell Counting Kit 8 (CCK8) method and annexin V/propidium iodide staining assays. Then, the effects of AEAR on the morphology, maturation, and function of DCs were detected using a microscope, flow cytometry-based surface receptor characterization, and endocytosis assays. The secretion levels of cytokines were then analyzed with enzyme-linked immunosorbent assay (ELISA). The activation state of DCs was evaluated by the mixed lymphocyte reaction (MLR). The activity of MAPKs and NF-κB pathways, which were involved in the regulation of AEAR on DCs, was further detected by Western blot. AEAR did not have a cytotoxic effect on DCs or mouse splenocytes. AEAR remarkably enhanced the phenotypic maturation of DCs and promoted the expression of costimulatory molecules and the secretion of cytokines in DCs. AEAR also significantly decreased the phagocytic ability of DCs and augmented the abilities of DCs to present antigens and stimulate allogeneic T-cell proliferation. Simultaneously, AEAR potently activated toll-like receptor (TLR)4-/TLR2-related MAPKs and induced the degradation of IκB and the translocation of NF-κB. In short, AEAR can profoundly enhance the immune-modulating activities of DCs via TLR4-/TLR2-mediated activation of MAPKs and NF-κB signaling pathways and is a promising candidate immunopotentiator for vaccines.
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Affiliation(s)
- Yu Yang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China; (Y.Y.); (D.W.); (Q.L.); (J.L.)
| | - DanYang Wang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China; (Y.Y.); (D.W.); (Q.L.); (J.L.)
| | - QuanXiao Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China; (Y.Y.); (D.W.); (Q.L.); (J.L.)
| | - Jiang He
- Key Laboratory of Uighur Medicine, Xinjiang Institute of Materia Medica, Xinjiang 830004, China;
| | - Bin Wang
- Key Lab of Medical Molecular Virology, School of Basic Medical Science, Shanghai Medical College, Fudan University, Shanghai 200032, China;
| | - Jinyao Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China; (Y.Y.); (D.W.); (Q.L.); (J.L.)
| | - Ailian Zhang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China; (Y.Y.); (D.W.); (Q.L.); (J.L.)
- Correspondence:
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Akyol S, Akgun MY, Yetmez M, Hanci M, Oktar FN, Ben-Nissan B. Comparative Analysis of NF-κB in the MyD88-Mediated Pathway After Implantation of Titanium Alloy and Stainless Steel and the Role of Regulatory T Cells. World Neurosurg 2020; 144:e138-e148. [PMID: 32781150 DOI: 10.1016/j.wneu.2020.08.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 08/03/2020] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Development of immunologically smart implants, integrated to biological systems, is a key aim to minimize the inflammatory response of the host to biomaterial implants. METHODS The aim of this study is to investigate the influence of titanium alloy and stainless steel implants on immunological responses in rats by comparative analysis of nuclear factor kappa B (NF-κB) profiles in the activation of inflammatory signaling pathways and the role of CD4+CD25+Foxp3+. RESULTS Both Ti alloy and stainless steel alloy group implantation affect Toll-like receptors-4 pathways and CD4+CD25+ regulatory T cells in different ways. CONCLUSIONS Results show that NF-κB/p65 and NF-κB1/p50 possess potential as a therapeutic target in the prevention of adverse reactions to metal, especially for controlling inflammation after the implantation.
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Affiliation(s)
- Sibel Akyol
- Department of Physiology, Istanbul University-Cerrahpasa, Istanbul, Turkey; Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, Australia
| | - Mehmet Yigit Akgun
- Department of Neurosurgery, High Specialized Hospital, Kirikkale, Turkey.
| | - Mehmet Yetmez
- Department of Mechanical Engineering, Faculty of Engineering, Zonguldak Bulent Ecevit University, Zonguldak, Turkey
| | - Murat Hanci
- Department of Neurosurgery, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Faik Nuzhet Oktar
- Faculty of Technology, Advanced Nanomaterials Research Laboratory, Marmara University, Istanbul, Turkey
| | - Besim Ben-Nissan
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, Australia
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33
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Wijeyekoon RS, Kronenberg-Versteeg D, Scott KM, Hayat S, Kuan WL, Evans JR, Breen DP, Cummins G, Jones JL, Clatworthy MR, Floto RA, Barker RA, Williams-Gray CH. Peripheral innate immune and bacterial signals relate to clinical heterogeneity in Parkinson's disease. Brain Behav Immun 2020; 87:473-488. [PMID: 32006615 PMCID: PMC7613010 DOI: 10.1016/j.bbi.2020.01.018] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/14/2020] [Accepted: 01/28/2020] [Indexed: 01/09/2023] Open
Abstract
The innate immune system is implicated in Parkinson's disease (PD), but peripheral in-vivo clinical evidence of the components and driving mechanisms involved and their relationship with clinical heterogeneity and progression to dementia remain poorly explored. We examined changes in peripheral innate immune-related markers in PD cases (n = 41) stratified according to risk of developing early dementia. 'Higher Risk'(HR) (n = 23) and 'Lower Risk' (LR) (n = 18) groups were defined according to neuropsychological predictors and MAPT H1/H2 genotype, and compared to age, gender and genotype-matched controls. Monocyte subsets and expression of key surface markers were measured using flow cytometry. Serum markers including alpha-synuclein, inflammasome-related caspase-1 and bacterial translocation-related endotoxin were measured using quantitative immuno-based assays. Specific markers were further investigated using monocyte assays and validated in plasma samples from a larger incident PD cohort (n = 95). We found that classical monocyte frequency was elevated in PD cases compared to controls, driven predominantly by the HR group, in whom Toll-Like Receptor (TLR)4+ monocytes and monocyte Triggering Receptor Expressed on Myeloid cells-2 (TREM2) expression were also increased. Monocyte Human Leukocyte Antigen (HLA)-DR expression correlated with clinical variables, with lower levels associated with worse cognitive/motor performance. Notably, monocyte changes were accompanied by elevated serum bacterial endotoxin, again predominantly in the HR group. Serum alpha-synuclein and inflammasome-related caspase-1 were decreased in PD cases compared to controls regardless of group, with decreased monocyte alpha-synuclein secretion in HR cases. Further, alpha-synuclein and caspase-1 correlated positively in serum and monocyte lysates, and in plasma from the larger cohort, though no associations were seen with baseline or 36-month longitudinal clinical data. Principal Components Analysis of all monocyte and significant serum markers indicated 3 major components. Component 1 (alpha-synuclein, caspase-1, TLR2+ monocytes) differentiated PD cases and controls in both groups, while Component 2 (endotoxin, monocyte TREM2, alpha-synuclein) did so predominantly in the HR group. Component 3 (classical monocytes, alpha-synuclein) also differentiated cases and controls overall in both groups. These findings demonstrate that systemic innate immune changes are present in PD and are greatest in those at higher risk of rapid progression to dementia. Markers associated with PD per-se (alpha-synuclein, caspase-1), differ from those related to cognitive progression and clinical heterogeneity (endotoxin, TREM2, TLR4, classical monocytes, HLA-DR), with mechanistic and therapeutic implications. Alpha-synuclein and caspase-1 are associated, suggesting inflammasome involvement common to all PD, while bacterial translocation associated changes may contribute towards progression to Parkinson's dementia. Additionally, HLA-DR-associated variations in antigen presentation/clearance may modulate existing clinical disease.
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Affiliation(s)
- Ruwani S. Wijeyekoon
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK,Corresponding Author;
| | | | - Kirsten M. Scott
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
| | - Shaista Hayat
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
| | - Wei-Li Kuan
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
| | - Jonathan R. Evans
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK,Nottingham University Hospital NHS Trust, Nottingham, UK
| | - David P. Breen
- Centre for Clinical Brain Sciences, University of Edinburgh, Chancellor’s Building, 49, Little France Crescent, Edinburgh, EH16 4SB, UK,Anne Rowling Regenerative Neurology Clinic, University of Edinburgh, Chancellor’s Building, 49, Little France Crescent, Edinburgh, EH16 4SB, UK,Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, 9, Little France Road, Edinburgh BioQuarter, Edinburgh, EH16 4UX, UK
| | - Gemma Cummins
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
| | - Joanne L. Jones
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | | | - R. Andres Floto
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Roger A. Barker
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK,Wellcome Trust-MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Caroline H. Williams-Gray
- John van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, UK
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Paudel YN, Angelopoulou E, Piperi C, Othman I, Shaikh MF. Implication of HMGB1 signaling pathways in Amyotrophic lateral sclerosis (ALS): From molecular mechanisms to pre-clinical results. Pharmacol Res 2020; 156:104792. [PMID: 32278047 DOI: 10.1016/j.phrs.2020.104792] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 02/14/2020] [Accepted: 04/01/2020] [Indexed: 02/06/2023]
Abstract
Amyotrophic lateral sclerosis (ALS) is a devastating and rapidly progressing neurodegenerative disorder with no effective disease-modifying treatment up to date. The underlying molecular mechanisms of ALS are not yet completely understood. However, the critical role of the innate immune system and neuroinflammation in ALS pathogenesis has gained increased attention. High mobility group box 1 (HMGB1) is a typical damage-associated molecular pattern (DAMP) molecule, acting as a pro-inflammatory cytokine mainly through activation of its principal receptors, the receptor for advanced glycation end products (RAGE) and toll-like receptor 4 (TLR4) which are crucial components of the innate immune system. HMGB1 is an endogenous ligand for both RAGE and TLR4 that mediate its biological effects. Herein, on the ground of pre-clinical findings we unravel the underlying mechanisms behind the plausible contribution of HMGB1 and its receptors (RAGE and TLR4) in the ALS pathogenesis. Furthermore, we provide an account of the therapeutic outcomes associated with inhibition/blocking of HMGB1 receptor signalling in preventing motor neuron's death and delaying disease progression in ALS experimental models. There is strong evidence that HMGB1, RAGE and TLR4 signaling axes might present potential targets against ALS, opening a novel headway in ALS research that could plausibly bridge the current treatment gap.
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Affiliation(s)
- Yam Nath Paudel
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia.
| | - Efthalia Angelopoulou
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Christina Piperi
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
| | - Iekhsan Othman
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
| | - Mohd Farooq Shaikh
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia.
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35
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Zhang Y, Ji T, Ma S, Wu W. RETRACTED: MLL1 promotes migration and invasion of fibroblast-like synoviocytes in rheumatoid arthritis by activating the TRIF/NF-κB signaling pathway via H3K4me3 enrichment in the TLR4 promoter region. Int Immunopharmacol 2020; 82:106220. [PMID: 32151962 DOI: 10.1016/j.intimp.2020.106220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/25/2019] [Accepted: 01/14/2020] [Indexed: 01/18/2023]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief. A corrigendum for this article was previously published which corrected issues within Figure 1, as detailed here: https://www.sciencedirect.com/science/article/pii/S1567576920337887?via%3Dihub. The journal was subsequently alerted to additional issues, including an associated PubPeer comment concerning the provenance of the flow cytometry data in Figure 1B, as detailed here: https://pubpeer.com/publications/AD39B667B4ACD09C930F532D0BD985; and here https://docs.google.com/spreadsheets/d/1r0MyIYpagBc58BRF9c3luWNlCX8VUvUuPyYYXzxWvgY/edit#gid=262337249. As part of a journal investigation, the editorial team noticed that many of the Western blots contained within the article were pixelated. In addition, the published email address of the corresponding author (zhangyd78@126.com), differed from the version submitted to the journal (weiwu_drww@163.com). The journal asked the authors to provide a detailed explanation to these concerns and the associated raw data. The Authors did not respond to this request. The Editor-in-Chief assessed the case and decided to retract the article.
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Affiliation(s)
- Yandong Zhang
- Department of Rheumatology, The First Hospital of Jilin University, Changchun 130021, PR China
| | - Tiefeng Ji
- Department of Radiology, The First Hospital of Jilin University, Changchun 130021, PR China
| | - Shu Ma
- Department of Rheumatology, The First Hospital of Jilin University, Changchun 130021, PR China
| | - Wei Wu
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun 130021, PR China.
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36
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Muldoon JJ, Chuang Y, Bagheri N, Leonard JN. Macrophages employ quorum licensing to regulate collective activation. Nat Commun 2020; 11:878. [PMID: 32054845 PMCID: PMC7018708 DOI: 10.1038/s41467-020-14547-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 12/19/2019] [Indexed: 01/23/2023] Open
Abstract
Macrophage-initiated inflammation is tightly regulated to eliminate threats such as infections while suppressing harmful immune activation. However, individual cells’ signaling responses to pro-inflammatory cues are heterogeneous, with subpopulations emerging with high or low activation states. Here, we use single-cell tracking and dynamical modeling to develop and validate a revised model for lipopolysaccharide (LPS)-induced macrophage activation that invokes a mechanism we term quorum licensing. The results show that bimodal phenotypic partitioning of macrophages is primed during the resting state, dependent on cumulative history of cell density, predicted by extrinsic noise in transcription factor expression, and independent of canonical LPS-induced intercellular feedback in the tumor necrosis factor (TNF) response. Our analysis shows how this density-dependent coupling produces a nonlinear effect on collective TNF production. We speculate that by linking macrophage density to activation, this mechanism could amplify local responses to threats and prevent false alarms. Macrophage activation is tightly regulated to maintain immune homeostasis, yet activation is also heterogeneous. Here, the authors show that macrophages coordinate activation by partitioning into two phenotypes that can nonlinearly amplify collective inflammatory cytokine production as a function of cell density.
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Affiliation(s)
- Joseph J Muldoon
- Interdisciplinary Biological Sciences Program, Northwestern University, Evanston, IL, 60208, USA.,Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Yishan Chuang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Neda Bagheri
- Interdisciplinary Biological Sciences Program, Northwestern University, Evanston, IL, 60208, USA. .,Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA. .,Center for Synthetic Biology, Northwestern University, Evanston, IL, 60208, USA. .,Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA. .,Member, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Evanston, IL, 60208, USA. .,Biology and Chemical Engineering, University of Washington, Seattle, WA, 98195, USA.
| | - Joshua N Leonard
- Interdisciplinary Biological Sciences Program, Northwestern University, Evanston, IL, 60208, USA. .,Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA. .,Center for Synthetic Biology, Northwestern University, Evanston, IL, 60208, USA. .,Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA. .,Member, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Evanston, IL, 60208, USA.
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37
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Papathanasiou I, Balis C, Trachana V, Mourmoura E, Tsezou A. The synergistic function of miR-140-5p and miR-146a on TLR4-mediated cytokine secretion in osteoarthritic chondrocytes. Biochem Biophys Res Commun 2019; 522:783-791. [PMID: 31791577 DOI: 10.1016/j.bbrc.2019.11.168] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 11/25/2019] [Indexed: 12/11/2022]
Abstract
ΜiR-140-5p and miR-146a regulate inflammatory pathways including TLR4/NF-κB signaling and have been found to be involved in OA pathogenesis. In this study, we investigated the effect of the synergistic function of miR-140-5p and miR-146a on inflammation mediated by TLR4 in ΟΑ chondrocytes. Bioinformatics analysis revealed that TLR4 was the only common OA-related target gene of miR-140-5p and miR-146a, located in the sub-network with the highest MCODE score; it also showed that the target genes of miR-140-5p and miR-146a which located in MCODE sub-networks were enriched in OA-related biological processes and pathways. Overexpression of miR-140-5p or miR-146a and combined miR-140-5p/miR-146a overexpression in OA chondrocytes demonstrated that combined treatment had the strongest negative effect on TLR4 expression. Moreover, simultaneous overexpression of miR-140-5p and miR-146a resulted in the highest reduction of NF-κΒ phosphorylation levels, as well as IL-1b, IL-6 and TNFa expression levels in OA chondrocytes as compared to the reductions observed when either miR-140-5p or miR-146a was overexpressed. Our results, therefore, demonstrate for the first time, that the synergistic function of miR-140-5p and miR-146a have a strong protective effect against inflammatory mediators' production in OA chondrocytes through targeting the TLR4/NF-κB signaling.
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Affiliation(s)
- Ioanna Papathanasiou
- Laboratory of Cytogenetics and Molecular Genetics, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Charalambos Balis
- Laboratory of Cytogenetics and Molecular Genetics, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Varvara Trachana
- Department of Biology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Evanthia Mourmoura
- Laboratory of Cytogenetics and Molecular Genetics, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Aspasia Tsezou
- Laboratory of Cytogenetics and Molecular Genetics, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece; Department of Biology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece.
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38
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Liu G, Gu C, Liu M, Liu H, Wang D, Liu X, Wang Y. Protective role of p120-catenin on mitochondria by inhibiting NLRP3 in ventilator-induced lung injury. J Cell Mol Med 2019; 23:7360-7371. [PMID: 31507096 PMCID: PMC6815848 DOI: 10.1111/jcmm.14595] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 06/17/2019] [Accepted: 07/14/2019] [Indexed: 01/21/2023] Open
Abstract
Mitochondria supply energy to maintain the integrity of cell junctions. NLRP3, as the core component of the inflammatory response, is crucial in mechanical stretching. Mechanical stretching could activate NLRP3 and induce mitochondrial dysfunction. The relationship between p120 and mitochondria in ventilator-induced lung injury (VILI) has not been elucidated. MLE-12 cells and wild-type male C57BL/6 mice were pre-treated with MCC950 (specific and highly efficient inhibitor of NLRP3) or a p120 siRNA-liposome complex. Then, the cells were subjected to 20% cyclic stretching, and the mice were subjected to mechanical ventilation at a high tidal volume. Cell lysates and lung tissues were obtained to detect the expression of NLRP3, p120, TLR4 pathway components, IL-6 and IL-1β, to determine the functions and structures of mitochondria, and the wet/dry ratio of the lung, and to perform pathological staining and an Evans blue dye assay. Mechanical stretching could increase the levels of NLRP3, ROS and damaged mitochondria, while these changes could be reversed by MCC950. Moreover, p120 prevented the activation of NLRP3 and regulated NLRP3 by inhibiting the TLR4 pathway and ROS production. Additionally, p120 played a vital role in protecting mitochondrial structures and functions after mechanical stretching. Taken together, these findings suggest that p120 depletion during mechanical stretching aggravates mitochondrial dysfunction by activating NLRP3, which indicates that p120 has a protective role on mitochondria in VILI by inhibiting NLRP3 activation.
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Affiliation(s)
- Ge Liu
- Department of AnesthesiologyShandong Provincial Qianfoshan Hospital, Shandong UniversityJinanChina
| | - Changping Gu
- Department of AnesthesiologyShandong Provincial Qianfoshan Hospital, Shandong UniversityJinanChina
| | - Mengjie Liu
- Department of AnesthesiologyShandong Provincial Qianfoshan Hospital, Shandong UniversityJinanChina
| | - Huan Liu
- Department of AnesthesiologyShandong Provincial Qianfoshan Hospital, Shandong UniversityJinanChina
| | - Dong Wang
- Department of AnesthesiologyShandong Provincial Qianfoshan Hospital, Shandong UniversityJinanChina
| | - Xiaobin Liu
- Department of AnesthesiologyShandong Provincial Qianfoshan Hospital, Shandong UniversityJinanChina
| | - Yuelan Wang
- Department of AnesthesiologyShandong Provincial Qianfoshan Hospital, Shandong UniversityJinanChina
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Pu X, Dong C, Zhu W, Li W, Jiang H. Silencing stomatin-like protein 2 attenuates tumor progression and inflammatory response through repressing CD14 in liver cancer. Onco Targets Ther 2019; 12:7361-7373. [PMID: 31571899 PMCID: PMC6750618 DOI: 10.2147/ott.s215131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 08/02/2019] [Indexed: 12/12/2022] Open
Abstract
Purpose Toll-like receptor 4 (TLR4) is involved in the inflammation in liver cancer. High-expressed stomatin-like protein 2 (SLP-2) is commonly reported in many cancer types. This study aims to investigate the functions of SLP-2 in TLR4-mediated inflammatory responses and tumor progression of liver cancer. Patients and methods Plasmid transfection technique was applied to silence and overexpress genes. Changes in cell viability and apoptosis were determined by performing cell counting kit-8 assay and flow cytometry. The levels of pro-inflammatory cytokines were determined by ELISA. We further measured the several types of the malignant transformation of SK-Hep1 cells to assess the effects of SLP-2 silencing on the cell migration and invasion, proliferation and angiogenesis of liver cancer in vitro. Western blot and RT-qPCR were performed for expression analysis. Results Lipopolysaccharide (LPS) promoted the cell proliferation of SK-Hep1 and production of tumor necrosis factor-α (TNF-α) and IL-6. SLP-2 silencing could inhibit the protein and mRNA levels of CD14 and Cdc42 and subsequently inhibited the levels of TNF-α and IL-6. Overexpressed CD14 not only remarkably reversed the proapoptotic ability of SLP-2 silencing and promoted the expression of Cdc42 and production of TNF-α and IL-6, but also notably reversed the inhibitory effects on the malignant abilities of SK-Hep1 cells by SLP-2 silencing. Conclusion SLP-2 silencing could significantly attenuate the inflammatory responses and tumor progression of liver cancer via inhibiting LPS/TLR4 signal transduction through the repression of CD14.
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Affiliation(s)
- Xiaolin Pu
- Department of Oncology, Changzhou Second People's Hospital, Changzhou, Jiangsu Province, People's Republic of China
| | - Changqing Dong
- Department of Thoracic Surgery, Nanjing Chest Hospital, Nanjing City, Jiangsu Province, People's Republic of China
| | - Wenyu Zhu
- Department of Oncology, Changzhou Second People's Hospital, Changzhou, Jiangsu Province, People's Republic of China
| | - Wei Li
- Department of Oncology, Jiangsu Province People's Hospital, Nanjing, Jiangsu Province, People's Republic of China
| | - Hua Jiang
- Department of Oncology, Changzhou Second People's Hospital, Changzhou, Jiangsu Province, People's Republic of China
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40
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Dickson K, Lehmann C. Inflammatory Response to Different Toxins in Experimental Sepsis Models. Int J Mol Sci 2019; 20:ijms20184341. [PMID: 31491842 PMCID: PMC6770119 DOI: 10.3390/ijms20184341] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 08/27/2019] [Accepted: 09/02/2019] [Indexed: 12/29/2022] Open
Abstract
Sepsis is defined as life-threatening organ dysfunction caused by the dysregulated host response to infection. Despite serious mortality and morbidity, no sepsis-specific drugs exist. Endotoxemia is often used to model the hyperinflammation associated with early sepsis. This model classically uses lipopolysaccharide (LPS) from Gram-negative pathogens to activate the immune system, leading to hyperinflammation, microcirculatory disturbances and death. Other toxins may also be used to activate the immune system including Gram-positive peptidoglycan (PG) and lipoteichoic acid (LTA). In addition to these standard toxins, other bacterial components can induce inflammation. These molecules activate different signaling pathways and produce different physiological responses which can be taken advantage of for sepsis modeling. Endotoxemia modeling can provide information on pathways to inflammation in sepsis and contribute to preclinical drug development.
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Affiliation(s)
- Kayle Dickson
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
| | - Christian Lehmann
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
- Department of Physiology and Biophysics, Dalhousie University, Halifax, NS B3H 4R2, Canada.
- Department of Pharmacology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
- Department of Anesthesia, Pain Management and Perioperative Medicine, Dalhousie University, Halifax, NS B3H 4R2, Canada.
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Pizzuto M, Lonez C, Baroja-Mazo A, Martínez-Banaclocha H, Tourlomousis P, Gangloff M, Pelegrin P, Ruysschaert JM, Gay NJ, Bryant CE. Saturation of acyl chains converts cardiolipin from an antagonist to an activator of Toll-like receptor-4. Cell Mol Life Sci 2019; 76:3667-3678. [PMID: 31062071 PMCID: PMC6697720 DOI: 10.1007/s00018-019-03113-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/12/2019] [Accepted: 04/23/2019] [Indexed: 02/07/2023]
Abstract
Cardiolipins (CLs) are tetra-acylated diphosphatidylglycerols found in bacteria, yeast, plants, and animals. In healthy mammals, CLs are unsaturated, whereas saturated CLs are found in blood cells from Barth syndrome patients and in some Gram-positive bacteria. Here, we show that unsaturated but not saturated CLs block LPS-induced NF-κB activation, TNF-α and IP-10 secretion in human and murine macrophages, as well as LPS-induced TNF-α and IL-1β release in human blood mononuclear cells. Using HEK293 cells transfected with Toll-like receptor 4 (TLR4) and its co-receptor Myeloid Differentiation 2 (MD2), we demonstrate that unsaturated CLs compete with LPS for binding TLR4/MD2 preventing its activation, whereas saturated CLs are TLR4/MD2 agonists. As a consequence, saturated CLs induce a pro-inflammatory response in macrophages characterized by TNF-α and IP-10 secretion, and activate the alternative NLRP3 inflammasome pathway in human blood-derived monocytes. Thus, we identify that double bonds discriminate between anti- and pro-inflammatory properties of tetra-acylated molecules, providing a rationale for the development of TLR4 activators and inhibitors for use as vaccine adjuvants or in the treatment of TLR4-related diseases.
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Affiliation(s)
- Malvina Pizzuto
- Structure and Function of Biological Membranes, Université Libre de Bruxelles, Blvd du Triomphe Access 2, 1050, Brussels, Belgium.
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK.
- Department of Veterinary Medicine, University of Cambridge, Madingley Rd, Cambridge, CB3 0ES, UK.
- Molecular Inflammation Group, Biomedical Research Institute of Murcia IMIB-Arrixaca, Clinical University Hospital Virgen de la Arrixaca, Carretera Buenavista s/n, 30120, Murcia, Spain.
| | - Caroline Lonez
- Structure and Function of Biological Membranes, Université Libre de Bruxelles, Blvd du Triomphe Access 2, 1050, Brussels, Belgium
- Department of Veterinary Medicine, University of Cambridge, Madingley Rd, Cambridge, CB3 0ES, UK
| | - Alberto Baroja-Mazo
- Molecular Inflammation Group, Biomedical Research Institute of Murcia IMIB-Arrixaca, Clinical University Hospital Virgen de la Arrixaca, Carretera Buenavista s/n, 30120, Murcia, Spain
| | - Helios Martínez-Banaclocha
- Molecular Inflammation Group, Biomedical Research Institute of Murcia IMIB-Arrixaca, Clinical University Hospital Virgen de la Arrixaca, Carretera Buenavista s/n, 30120, Murcia, Spain
| | - Panagiotis Tourlomousis
- Department of Veterinary Medicine, University of Cambridge, Madingley Rd, Cambridge, CB3 0ES, UK
| | - Monique Gangloff
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK
| | - Pablo Pelegrin
- Molecular Inflammation Group, Biomedical Research Institute of Murcia IMIB-Arrixaca, Clinical University Hospital Virgen de la Arrixaca, Carretera Buenavista s/n, 30120, Murcia, Spain
| | - Jean-Marie Ruysschaert
- Structure and Function of Biological Membranes, Université Libre de Bruxelles, Blvd du Triomphe Access 2, 1050, Brussels, Belgium
| | - Nicholas J Gay
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK
| | - Clare E Bryant
- Department of Veterinary Medicine, University of Cambridge, Madingley Rd, Cambridge, CB3 0ES, UK
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Tümer KÇ, Özdemİr H, Eröksüz H. Evaluation of cardiac troponin I in serum and myocardium of rabbits with experimentally induced polymicrobial sepsis. Exp Anim 2019; 69:54-61. [PMID: 31462610 PMCID: PMC7004812 DOI: 10.1538/expanim.19-0046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Sepsis is a potentially life-threatening condition, and it is frequently complicated by
myocardial damage. Data on myocardial damage in rabbit caecal ligation and puncture (CLP)
models are limited, although numerous animal models have been used to study
sepsis-associated myocardial damage. This study aimed to investigate the effect of CLP on
cardiac muscle by measuring serum cardiac troponin I (cTnI) concentrations and by
detecting both histopathological changes and cTnI immunoreactivity in cardiomyocytes in
rabbits. After CLP was performed in rabbits, blood samples were taken from the jugular
vein at 0, 4, 8, and 12 h for haematological and biochemical analyses. At the end of the
experiment, all of the rabbits were euthanised to examine the histopathological changes
and the cTnI immunoreactivity in cardiac muscle tissue. No changes in serum cTnI
concentration were observed in the experimental group (EG) or control group (CG) at 0 and
4 h. In EG, the mean serum cTnI concentrations were 0.230 ± 0.209 and 1.177 ± 0.971 ng/ml
at 8 and 12 h, respectively. In CG, the mean serum cTnI concentrations were 0.032 ± 0.014
and 0.031 ± 0.021 ng/ml at 8 and 12 h, respectively. Moreover, cytoplasmic cTnI
immunoreactivity decreased in EG compared with that in CG (P<0.01).
The results demonstrated that CLP induced a systemic inflammatory response and caused
myocardial damage in rabbits.
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Affiliation(s)
- Kenan Çağrı Tümer
- Department of Internal Medicine, Faculty of Veterinary Medicine, Firat University, 23200, Elazığ, Turkey
| | - Haydar Özdemİr
- Department of Internal Medicine, Faculty of Veterinary Medicine, Firat University, 23200, Elazığ, Turkey
| | - Hatice Eröksüz
- Department of Pathology, Faculty of Veterinary Medicine, Firat University, 23200, Elazığ, Turkey
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Zhang L, Wei X, Zhang R, Petitte JN, Si D, Li Z, Cheng J, Du M. Design and Development of a Novel Peptide for Treating Intestinal Inflammation. Front Immunol 2019; 10:1841. [PMID: 31447849 PMCID: PMC6691347 DOI: 10.3389/fimmu.2019.01841] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Accepted: 07/22/2019] [Indexed: 12/24/2022] Open
Abstract
Intestinal inflammatory disorders, such as inflammatory bowel disease (IBD), are associated with increased pro-inflammatory cytokine secretion in the intestines. Furthermore, intestinal inflammation increases the risk of enteric cancer, which is a common malignancy globally. Native anti-inflammatory peptides are a class of anti-inflammatory agents that could be used in the treatment of several intestinal inflammation conditions. However, potential cytotoxicity, and poor anti-inflammatory activity have prevented their development as anti-inflammatory agents. Therefore, in this study, we designed and developed a novel hybrid peptide for the treatment of intestinal inflammation. Eight hybrid peptides were designed by combining the active centers of antimicrobial peptides, including LL-37 (13-36), YW12D, innate defense regulator 1, and cathelicidin 2 (1-13) with thymopentin or the active center of thymosin alpha 1 (Tα1) (17-24). The hybrid peptide, LL-37-Tα1 (LTA), had improved anti-inflammatory activity with minimal cytotoxicity. LTA was screened by molecule docking and in vitro experiments. Likewise, its anti-inflammatory effects and mechanisms were also evaluated using a lipopolysaccharide (LPS)-induced intestinal inflammation murine model. The results showed that LTA prevented LPS-induced impairment in the jejunum epithelium tissues and infiltration of leukocytes, which are both histological markers of inflammation. Additionally, LTA decreased the levels of tumor necrosis factor-alpha, interferon-gamma, interleukin-6, and interleukin-1β. LTA increased the expression of zonula occludens-1 and occludin, and reduced permeability and apoptosis in the jejunum of LPS-treated mice. Additionally, its anti-inflammatory effect is associated with neutralizing LPS, binding to the Toll-like receptor 4-myeloid differentiation factor 2 (TLR4/MD-2) complex, and modulating the nuclear factor-kappa B signal transduction pathway. The findings of this study suggest that LTA may be an effective therapeutic agent in the treatment of intestinal inflammation.
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Affiliation(s)
- Lulu Zhang
- Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xubiao Wei
- Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Rijun Zhang
- Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Jim N Petitte
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, United States
| | - Dayong Si
- Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhongxuan Li
- Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Junhao Cheng
- Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Mengsi Du
- Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Zhang X, Peng Y, Grace PM, Metcalf MD, Kwilasz AJ, Wang Y, Zhang T, Wu S, Selfridge BR, Portoghese PS, Rice KC, Watkins LR, Hutchinson MR, Wang X. Stereochemistry and innate immune recognition: (+)-norbinaltorphimine targets myeloid differentiation protein 2 and inhibits toll-like receptor 4 signaling. FASEB J 2019; 33:9577-9587. [PMID: 31162938 PMCID: PMC6988860 DOI: 10.1096/fj.201900173rrr] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/29/2019] [Indexed: 02/06/2023]
Abstract
Deregulation of innate immune TLR4 signaling contributes to various diseases including neuropathic pain and drug addiction. Naltrexone is one of the rare TLR4 antagonists with good blood-brain barrier permeability and showing no stereoselectivity for TLR4. By linking 2 naltrexone units through a rigid pyrrole spacer, the bivalent ligand norbinaltorphimine was formed. Interestingly, (+)-norbinaltorphimine [(+)-1] showed ∼25 times better TLR4 antagonist activity than naltrexone in microglial BV-2 cell line, whereas (-)-norbinaltorphimine [(-)-1] lost TLR4 activity. The enantioselectivity of norbinaltorphimine was further confirmed in primary microglia, astrocytes, and macrophages. The activities of meso isomer of norbinaltorphimine and the molecular dynamic simulation results demonstrate that the stereochemistry of (+)-1 is derived from the (+)-naltrexone pharmacophore. Moreover, (+)-1 significantly increased and prolonged morphine analgesia in vivo. The efficacy of (+)-1 is long lasting. This is the first report showing enantioselective modulation of the innate immune TLR signaling.-Zhang, X., Peng, Y., Grace, P. M., Metcalf, M. D., Kwilasz, A. J., Wang, Y., Zhang, T., Wu, S., Selfridge, B. R., Portoghese, P. S., Rice, K. C., Watkins, L. R., Hutchinson, M. R., Wang, X. Stereochemistry and innate immune recognition: (+)-norbinaltorphimine targets myeloid differentiation protein 2 and inhibits toll-like receptor 4 signaling.
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Affiliation(s)
- Xiaozheng Zhang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yinghua Peng
- State Key Laboratory for Molecular Biology of Special Economic Animals, Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Peter M. Grace
- Department of Psychology and Neuroscience, Center for Neuroscience, University of Colorado at Boulder, Boulder, Colorado, USA
| | - Matthew D. Metcalf
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Andrew J. Kwilasz
- Department of Psychology and Neuroscience, Center for Neuroscience, University of Colorado at Boulder, Boulder, Colorado, USA
| | - Yibo Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Tianshu Zhang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Siru Wu
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Brandon R. Selfridge
- Drug Design and Synthesis Section, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
| | - Philip S. Portoghese
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Kenner C. Rice
- Drug Design and Synthesis Section, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
| | - Linda R. Watkins
- Department of Psychology and Neuroscience, Center for Neuroscience, University of Colorado at Boulder, Boulder, Colorado, USA
| | - Mark R. Hutchinson
- Discipline of Physiology, Adelaide Medical School and Australian Research Council (ARC) Centre of Excellence for Nanoscale Biophotonics, University of Adelaide, South Australia, Australia
| | - Xiaohui Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
- University of Chinese Academy of Sciences, Beijing, China
- Department of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
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Achek A, Shah M, Seo JY, Kwon HK, Gui X, Shin HJ, Cho EY, Lee BS, Kim DJ, Lee SH, Yoo TH, Kim MS, Choi S. Linear and Rationally Designed Stapled Peptides Abrogate TLR4 Pathway and Relieve Inflammatory Symptoms in Rheumatoid Arthritis Rat Model. J Med Chem 2019; 62:6495-6511. [PMID: 31283217 DOI: 10.1021/acs.jmedchem.9b00061] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A mounting evidence exists for the despicable role of the aberrant immune response in the pathogenesis of rheumatoid arthritis (RA), where toll-like receptor 4 (TLR4) can activate synovial fibroblasts that lead to the chronic inflammation and joint destruction, thus making TLR4 a potent drug target in RA. We report that novel TLR4-antagonizing peptide, PIP2, inhibits the induction of inflammatory biomarkers in vitro as well as in vivo. Systemically, PIP2 inhibits the lipopolysaccharide (LPS)-elicited TNF-α, IL-6, and IL-12p40 in a mouse model. The rationally designed cyclic derivative, cPIP2, is capable of inhibiting LPS-induced proinflammatory cytokines at significantly lower concentration as compared to PIP2 (PIP2 IC50 = 20 μM, cPIP2 IC50 = 5 μM). Finally, cPIP2 was able to relieve the inflammatory symptoms and synovial tissue destruction in the RA rat model. Cumulatively, these data suggest that PIP2 and cPIP2 hold strong promise for the development of peptide-based immunotherapeutics that could be of great value in curbing TLR-related immune complications including RA.
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Affiliation(s)
- Asma Achek
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Masaud Shah
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Ji Young Seo
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Hyuk-Kwon Kwon
- Department of Orthopedics and Rehabilitation , Yale University School of Medicine , New Haven , Connecticut 06520-8071 , United States
| | - Xiangai Gui
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Hyeon-Jun Shin
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Eun-Young Cho
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Byeong Sung Lee
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Dong-Jin Kim
- Division of Nephrology, Department of Internal Medicine , Kyung Hee University Hospital at Gangdong , Seoul 05278 , Korea
| | - Sang Ho Lee
- Division of Nephrology, Department of Internal Medicine , Kyung Hee University Hospital at Gangdong , Seoul 05278 , Korea
| | - Tae Hyeon Yoo
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Moon Suk Kim
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
| | - Sangdun Choi
- Department of Molecular Science and Technology , Ajou University , Suwon 16499 , Korea
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Manuel CR, Latuga MS, Ashby CR, Reznik SE. Immune tolerance attenuates gut dysbiosis, dysregulated uterine gene expression and high-fat diet potentiated preterm birth in mice. Am J Obstet Gynecol 2019; 220:596.e1-596.e28. [PMID: 30790568 DOI: 10.1016/j.ajog.2019.02.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 02/09/2019] [Accepted: 02/14/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND Preterm delivery accounts for 85% of perinatal morbidity and mortality. Although the consumption of a high-fat diet leads to exaggerated proinflammatory responses and, in pregnant women, increased rates of spontaneous preterm birth, the underlying mechanisms remain unclear. OBJECTIVE We sought to elucidate the mechanisms by which maternal consumption of a high-fat diet leads to a dysregulated immune response and, subsequently, spontaneous preterm birth. STUDY DESIGN We performed 16S ribosomal RNA sequencing of DNA extracted and amplified from stool samples and compared the gut microbiomes of lipopolysaccharide-induced pregnant mice that were maintained on a high-fat diet compared to a normal control diet. Next, we sequenced the uterine transcriptomes of the mice. To test the effect of dampening of the immune response on the microbiome, transcriptome, and risk of spontaneous preterm birth, we induced immune tolerance with repetitive subclinical doses (0.2 mg/kg/week for 8 weeks) of endotoxin and performed 16S ribosomal RNA and uterine transcriptome sequencing on these immunotolerized mice. RESULTS High-fat diet potentiates lipopolysaccharide-induced preterm birth by affecting the maternal gut microbiome and uterine transcriptome and reduces antioxidant capacity in a murine model. High-fat diet consumption also increases the colonization of the gut by 5 immunogenic bacteria and decreases colonization by Lachnospiraceae_NK4A136_group. Uteri from high-fat diet mice had increased expression of genes that stimulate the inflammatory-oxidative stress axis, autophagy/apoptosis, and smooth muscle contraction. Repetitive endotoxin priming protects high-fat diet dams from spontaneous preterm birth, increases colonization of the gut by Lachnospiraceae_NK4A136_group, decreases levels of immunogenic bacteria in the gut microbiome, and reduces the number of dysregulated genes after high-fat diet consumption from 994 to 74. CONCLUSION High-fat diet-potentiated spontaneous preterm birth is mediated by increased inflammation, oxidative stress, and gut dysbiosis. The induction of immune tolerance via endotoxin priming reverses these effects and protects high-fat diet dams from spontaneous preterm birth. Based on this work, the role of immunomodulation as a novel therapeutic approach to prevent preterm birth among women who consume high-fat diets should be explored.
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Lu M, Zhu X, Yang Z, Zhang W, Sun Z, Ji Q, Chen X, Zhu J, Wang C, Nie S. E3 ubiquitin ligase tripartite motif 7 positively regulates the TLR4-mediated immune response via its E3 ligase domain in macrophages. Mol Immunol 2019; 109:126-133. [PMID: 30928727 DOI: 10.1016/j.molimm.2019.01.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 01/22/2019] [Accepted: 01/25/2019] [Indexed: 02/06/2023]
Abstract
Members of the tripartite motif (TRIM) family as E3 ubiquitin ligases have been regarded as critical regulators of innate immunity and antiviral response. However, the role of TRIM7 is still elusive. Here, we provide evidence for the importance of TRIM7 in regulation of the TLR4-mediated innate response. In detail, we find that TRIM7 is highly expressed in antigen-presenting cells like macrophages. Knockdown of TRIM7 clearly inhibits the LPS-induced production of IFN-β, TNF-α and IL-6 in macrophages. Conversely, forced expression of TRIM7 could exert an opposite effect on these pro-inflammatory cytokines. Further analysis indicates that such effect is mediated by the TLR4-associated signaling pathways including MAPKs, NF-κB and IRF3-involved pathways. Truncation of the E3 ligase domain on TRIM7 may reduce the production of pro-inflammatory cytokines, suggesting a critical role of this domain in the regulation of LPS-initiated innate response. Taken together, we report here that TRIM7 may facilitate the TLR4-mediated innate response via its E3 ligase domain in macrophages, which provides new insight into the mechanistic role of TRIM7 in innate immunity.
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Affiliation(s)
- Mingfeng Lu
- Department of Emergency Medicine, Jinling Clinical Medical College of Nanjing Medical University, Nanjing, China; Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China; Department of Emergency Medicine, Northern Jiangsu People's Hospital Affiliated to Yangzhou University, Yangzhou, China
| | - Xuhui Zhu
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China; Department of Epidemiology and Microbiology, Huadong Medical Institute of Biotechniques, Nanjing, China
| | - Zhizhou Yang
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Wei Zhang
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Zhaorui Sun
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Qijian Ji
- Department of Emergency Medicine, Jinling Clinical Medical College of Nanjing Medical University, Nanjing, China; Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xin Chen
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jin Zhu
- Department of Epidemiology and Microbiology, Huadong Medical Institute of Biotechniques, Nanjing, China
| | - Changjun Wang
- Department of Epidemiology and Microbiology, Huadong Medical Institute of Biotechniques, Nanjing, China
| | - Shinan Nie
- Department of Emergency Medicine, Jinling Clinical Medical College of Nanjing Medical University, Nanjing, China; Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.
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Jia L, Sun P, Gao H, Shen J, Gao Y, Meng C, Fu S, Yao H, Zhang G. Mangiferin attenuates bleomycin-induced pulmonary fibrosis in mice through inhibiting TLR4/p65 and TGF-β1/Smad2/3 pathway. J Pharm Pharmacol 2019; 71:1017-1028. [PMID: 30847938 DOI: 10.1111/jphp.13077] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 01/12/2019] [Indexed: 12/30/2022]
Abstract
Abstract
Objectives
Investigating the antipulmonary fibrosis effect of mangiferin from Mangifera indica and the possible molecular mechanism.
Methods
In vivo, bleomycin (BLM)-induced pulmonary fibrosis experimental model was used for evaluating antipulmonary fibrosis effect of mangiferin. Histopathologic examination and collagen deposition were investigated by HE and Masson staining as well as detecting the content of hydroxyproline. The expression of transforming growth factor-β1 (TGF-β1), α-smooth muscle actin (α-SMA), TLR4 and p-P65 in lung tissue was analysed through immunofluorescence. Leucocytes and inflammatory cytokines including IL-1β, IL-6, TNF-α and MCP-1 in bronchoalveolar lavage fluid were detected by cell counting and enzyme-linked immunosorbent assay. In vitro, TGF-β1-induced A549 epithelial–mesenchymal transition (EMT) cell model was used for investigating the possible molecular mechanism. Reactive oxygen species (ROS) generation was detected by DCFH-DA assay. Expression of all proteins was examined by Western blot.
Key findings
Oral administration of mangiferin could attenuate the severity of BLM-induced pulmonary fibrosis through increasing the survival rate, improving histopathological lesion and body weight loss as well as decreasing pulmonary index visibly. Pulmonary hydroxyproline content, TGF-β1, and α-SMA levels were reduced significantly. The molecular mechanism of mangiferin for inhibiting pulmonary fibrosis is that it could obviously inhibit the occurrence of inflammation and the secretion of inflammatory cytokine through inhibiting activation of TLR4 and phosphorylation of p65. Meanwhile, EMT process was suppressed obviously by mangiferin through blocking the phosphorylation of Smad2/3 and reducing MMP-9 expression. Besides, mangiferin could significantly inhibit the process of oxidant stress through downregulating the intracellular ROS generation.
Conclusions
Mangiferin attenuates BLM-induced pulmonary fibrosis in mice through inhibiting TLR4/p65 and TGF-β1/Smad2/3 pathway.
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Affiliation(s)
- Li Jia
- Yanan's People Hospital, Yanan, Shanxi, China
| | - Ping Sun
- Yanan's People Hospital, Yanan, Shanxi, China
| | - Hui Gao
- Yanan's People Hospital, Yanan, Shanxi, China
| | - Jie Shen
- Yanan's People Hospital, Yanan, Shanxi, China
| | - Yuan Gao
- Yanan's People Hospital, Yanan, Shanxi, China
| | - Cheng Meng
- Yanan's People Hospital, Yanan, Shanxi, China
| | - Shidong Fu
- Yanan's People Hospital, Yanan, Shanxi, China
| | - Huijuan Yao
- Yanan's People Hospital, Yanan, Shanxi, China
| | - Gong Zhang
- Yanan University Affiliated Hospital, Yanan, Shanxi, China
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Ohtani N, Kawada N. Role of the Gut-Liver Axis in Liver Inflammation, Fibrosis, and Cancer: A Special Focus on the Gut Microbiota Relationship. Hepatol Commun 2019; 3:456-470. [PMID: 30976737 PMCID: PMC6442695 DOI: 10.1002/hep4.1331] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/11/2019] [Indexed: 12/20/2022] Open
Abstract
The gut and the liver are anatomically and physiologically connected, and this “gut–liver axis” exerts various influences on liver pathology. The gut microbiota consists of various microorganisms that normally coexist in the human gut and have a role of maintaining the homeostasis of the host. However, once homeostasis is disturbed, metabolites and components derived from the gut microbiota translocate to the liver and induce pathologic effects in the liver. In this review, we introduce and discuss the mechanisms of liver inflammation, fibrosis, and cancer that are influenced by gut microbial components and metabolites; we include recent advances in molecular‐based therapeutics and novel mechanistic findings associated with the gut–liver axis and gut microbiota.
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Affiliation(s)
- Naoko Ohtani
- Department of Pathophysiology Osaka City University, Graduate School of Medicine Osaka Japan
| | - Norifumi Kawada
- Department of Hepatology Osaka City University, Graduate School of Medicine Osaka Japan
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Human Toll-Like Receptor 4 (hTLR4): Structural and functional dynamics in cancer. Int J Biol Macromol 2019; 122:425-451. [DOI: 10.1016/j.ijbiomac.2018.10.142] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/10/2018] [Accepted: 10/18/2018] [Indexed: 12/23/2022]
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