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Bhardwaj A, Prasad D, Mukherjee S. Role of toll-like receptor in the pathogenesis of oral cancer. Cell Biochem Biophys 2024; 82:91-105. [PMID: 37853249 DOI: 10.1007/s12013-023-01191-8] [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: 07/12/2023] [Accepted: 10/06/2023] [Indexed: 10/20/2023]
Abstract
Toll-like receptors are important molecules of innate immunity. They are known as pattern recognition receptors. They recognise certain molecules known as pathogen-associated molecular pattern on a pathogen and release chemicals that causes inflammation. Toll-like receptors (TLR) help in the removal of the infected cell and thus stop the spread of infection and are being studied for their association with cancer. Oral carcinoma has emerged as a major problem of our country today; it is found ranks first in men and third in women. Toll-like receptors have been implicated in the development of cancer. Certain polymorphisms in toll-like receptor can make a cell more susceptible to develop oral cancer. The identification of toll-like receptors and the different genotypes that are involved in the development of cancer can be utilised for using them as biomarkers of the disease. The study revealed that toll-like receptors like TLR7 and TLR5 are found to have a role in suppression of oral cancer while toll-like receptors like TLR4 and TLR2 are found to be associated with the progression of oral cancer. Toll-like receptors can turn out as important target molecules in the future in designing therapeutic strategies for oral cancer.
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Affiliation(s)
- Ananya Bhardwaj
- Amity Institute of Biotechnology, Amity University Uttar Pradesh Lucknow Campus, Lucknow, Uttar Pradesh, India
| | - Divya Prasad
- Amity Institute of Biotechnology, Amity University Uttar Pradesh Lucknow Campus, Lucknow, Uttar Pradesh, India
| | - Sayali Mukherjee
- Amity Institute of Biotechnology, Amity University Uttar Pradesh Lucknow Campus, Lucknow, Uttar Pradesh, India.
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2
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Silva RCMC, Gomes FM. Evolution of the Major Components of Innate Immunity in Animals. J Mol Evol 2024; 92:3-20. [PMID: 38281163 DOI: 10.1007/s00239-024-10155-2] [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: 10/28/2023] [Accepted: 01/11/2024] [Indexed: 01/30/2024]
Abstract
Innate immunity is present in all animals. In this review, we explore the main conserved mechanisms of recognition and innate immune responses among animals. In this sense, we discuss the receptors, critical for binding to pathogen-associated molecular patterns (PAMPs) or danger-associated molecular patterns (DAMPs); the downstream signaling proteins; and transcription factors that govern immune responses. We also highlight conserved inflammatory mediators that are induced after the recognition of DAMPs and PAMPs. At last, we discuss the mechanisms that are involved in the regulation and/or generation of reactive oxygen species (ROS), influencing immune responses, like heme-oxygenases (HOs).
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Affiliation(s)
- Rafael Cardoso Maciel Costa Silva
- Laboratory of Immunoreceptors and Signaling, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Fábio Mendonça Gomes
- Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Niknejad A, Hosseini Y, Shamsnia HS, Kashani AS, Rostamian F, Momtaz S, Abdolghaffari AH. Sodium Glucose Transporter-2 Inhibitors (SGLT2Is)-TLRs Axis Modulates Diabetes. Cell Biochem Biophys 2023; 81:599-613. [PMID: 37658280 DOI: 10.1007/s12013-023-01164-x] [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] [Accepted: 08/06/2023] [Indexed: 09/03/2023]
Abstract
Diabetes affects millions of people worldwide and is mainly associated with impaired insulin function. To date, various oral anti-diabetic drugs have been developed, of which, the sodium glucose transporter-2 inhibitors (SGLT2Is) are of the most recent classes that have been introduced. They differ from other classes in terms of their novel mechanism of actions and unique beneficial effects rather than just lowering glucose levels. SGLT2Is can protect body against cardiovascular events and kidney diseases even in non-diabetic individuals. SGLT2Is participate in immune cell activation, oxidative stress reduction, and inflammation mediation, thereby, moderating diabetic complications. In addition, toll like receptors (TLRs) are the intermediators of the immune system and inflammatory process, thus it's believed to play crucial roles in diabetic complications, particularly the ones that are related to inflammatory reactions. SGLT2Is are also effective against diabetic complications via their anti-inflammatory and oxidative properties. Given the anti-inflammatory properties of TLRs and SGLT2Is, this review investigates how SGLT2Is can affect the TLR pathway, and whether this could be favorable toward diabetes.
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Affiliation(s)
- Amirhossein Niknejad
- Department of Toxicology & Pharmacology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- GI Pharmacology Interest Group (GPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Yasamin Hosseini
- Department of Toxicology & Pharmacology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- GI Pharmacology Interest Group (GPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Hedieh Sadat Shamsnia
- Department of Toxicology & Pharmacology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- GI Pharmacology Interest Group (GPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Ayeh Sabbagh Kashani
- Department of Toxicology & Pharmacology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- GI Pharmacology Interest Group (GPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Fatemeh Rostamian
- Department of Toxicology & Pharmacology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- GI Pharmacology Interest Group (GPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Saeideh Momtaz
- GI Pharmacology Interest Group (GPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
- Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran.
- Department of Toxicology and Pharmacology, School of Pharmacy, and Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran.
| | - Amir Hossein Abdolghaffari
- Department of Toxicology & Pharmacology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
- GI Pharmacology Interest Group (GPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
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Wang J, Zhang X, Ma X, Chen D, Cai M, Xiao L, Li J, Huang Z, Huang Y, Lian Y. Blockage of CacyBP inhibits macrophage recruitment and improves anti-PD-1 therapy in hepatocellular carcinoma. J Exp Clin Cancer Res 2023; 42:303. [PMID: 37968706 PMCID: PMC10652496 DOI: 10.1186/s13046-023-02885-w] [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: 08/16/2023] [Accepted: 11/03/2023] [Indexed: 11/17/2023] Open
Abstract
BACKGROUND Despite remarkable advancements in cancer immunotherapy, the overall response rate to anti-programmed cell death-1 (anti-PD-1) therapy in hepatocellular carcinoma (HCC) patients remains low. Our previous study has demonstrated the critical role of CacyBP/SIP (Calcyclin-Binding Protein and Siah-1 Interacting Protein) as a regulator of HCC development and progression. However, the possible impact of CacyBP on the tumor immune microenvironment has not yet been clarified. METHODS The expressions of CacyBP and Myd88 in HCC cell lines and tissues was detected by bioinformatics analysis, real-time quantitative PCR, western blotting and immunohistochemistry. The interaction between CacyBP and Myd88 was measured using co-immunoprecipitation and immunofluorescence. In vitro and in vivo assays were used to investigate the regulation of CacyBP on tumor-associated macrophages (TAMs). RESULTS We identified that CacyBP was positively correlated with Myd88, a master regulator of innate immunity, and Myd88 was a novel binding substrate downstream of CacyBP in HCC. Additionally, CacyBP protected Myd88 from Siah-1-mediated proteasome-dependent degradation by competitively binding to its Toll/interleukin-1 receptor (TIR) domain. Inhibition of CacyBP-Myd88 signaling subsequently diminished HDAC1-mediated H3K9ac and H3K27ac modifications on the CX3CL1 promoter and reduced its transcription and secretion in HCC cells. Moreover, by using in vitro and in vivo strategies, we demonstrated that depletion of CacyBP impaired the infiltration of TAMs and the immunosuppressive state of the tumor microenvironment, further sensitizing HCC-bearing anti-PD-1 therapy. CONCLUSIONS Our findings suggest that targeting CacyBP may be a novel treatment strategy for improving the efficacy of anti-PD-1 immunotherapy in HCC.
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Affiliation(s)
- Jialiang Wang
- Guangdong Provincial Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China
| | - Xiaoyu Zhang
- Department of Infectious Diseases, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China
| | - Xinyi Ma
- Department of Infectious Diseases, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China
| | - Dongmei Chen
- Guangdong Provincial Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China
| | - Meina Cai
- Department of Infectious Diseases, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China
| | - Lexin Xiao
- Guangdong Provincial Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China
| | - Jing Li
- Guangdong Provincial Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China
| | - Zexuan Huang
- Guangdong Provincial Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China
| | - Yuehua Huang
- Guangdong Provincial Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China.
- Department of Infectious Diseases, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China.
| | - Yifan Lian
- Guangdong Provincial Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Rd., Guangzhou, 510630, China.
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Muslimov A, Tereshchenko V, Shevyrev D, Rogova A, Lepik K, Reshetnikov V, Ivanov R. The Dual Role of the Innate Immune System in the Effectiveness of mRNA Therapeutics. Int J Mol Sci 2023; 24:14820. [PMID: 37834268 PMCID: PMC10573212 DOI: 10.3390/ijms241914820] [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: 07/13/2023] [Revised: 09/24/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023] Open
Abstract
Advances in molecular biology have revolutionized the use of messenger RNA (mRNA) as a therapeutic. The concept of nucleic acid therapy with mRNA originated in 1990 when Wolff et al. reported successful expression of proteins in target organs by direct injection of either plasmid DNA or mRNA. It took decades to bring the transfection efficiency of mRNA closer to that of DNA. The next few decades were dedicated to turning in vitro-transcribed (IVT) mRNA from a promising delivery tool for gene therapy into a full-blown therapeutic modality, which changed the biotech market rapidly. Hundreds of clinical trials are currently underway using mRNA for prophylaxis and therapy of infectious diseases and cancers, in regenerative medicine, and genome editing. The potential of IVT mRNA to induce an innate immune response favors its use for vaccination and immunotherapy. Nonetheless, in non-immunotherapy applications, the intrinsic immunostimulatory activity of mRNA directly hinders the desired therapeutic effect since it can seriously impair the target protein expression. Targeting the same innate immune factors can increase the effectiveness of mRNA therapeutics for some indications and decrease it for others, and vice versa. The review aims to present the innate immunity-related 'barriers' or 'springboards' that may affect the development of immunotherapies and non-immunotherapy applications of mRNA medicines.
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Affiliation(s)
- Albert Muslimov
- Scientific Center for Translational Medicine, Sirius University of Science and Technology, Olympic Ave 1, 354340 Sirius, Russia; (V.T.); (D.S.); (V.R.); (R.I.)
- Laboratory of Nano- and Microencapsulation of Biologically Active Substances, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia;
- RM Gorbacheva Research Institute, Pavlov University, L’va Tolstogo 6-8, 197022 St. Petersburg, Russia;
| | - Valeriy Tereshchenko
- Scientific Center for Translational Medicine, Sirius University of Science and Technology, Olympic Ave 1, 354340 Sirius, Russia; (V.T.); (D.S.); (V.R.); (R.I.)
| | - Daniil Shevyrev
- Scientific Center for Translational Medicine, Sirius University of Science and Technology, Olympic Ave 1, 354340 Sirius, Russia; (V.T.); (D.S.); (V.R.); (R.I.)
| | - Anna Rogova
- Laboratory of Nano- and Microencapsulation of Biologically Active Substances, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia;
- Saint-Petersburg Chemical-Pharmaceutical University, Professora Popova 14, 197376 St. Petersburg, Russia
- School of Physics and Engineering, ITMO University, Lomonosova 9, 191002 St. Petersburg, Russia
| | - Kirill Lepik
- RM Gorbacheva Research Institute, Pavlov University, L’va Tolstogo 6-8, 197022 St. Petersburg, Russia;
| | - Vasiliy Reshetnikov
- Scientific Center for Translational Medicine, Sirius University of Science and Technology, Olympic Ave 1, 354340 Sirius, Russia; (V.T.); (D.S.); (V.R.); (R.I.)
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Prospekt Akad. Lavrentyeva 10, 630090 Novosibirsk, Russia
| | - Roman Ivanov
- Scientific Center for Translational Medicine, Sirius University of Science and Technology, Olympic Ave 1, 354340 Sirius, Russia; (V.T.); (D.S.); (V.R.); (R.I.)
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Autism Spectrum Disorders: A Recent Update on Targeting Inflammatory Pathways with Natural Anti-Inflammatory Agents. Biomedicines 2023; 11:biomedicines11010115. [PMID: 36672623 PMCID: PMC9856079 DOI: 10.3390/biomedicines11010115] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/26/2022] [Accepted: 12/28/2022] [Indexed: 01/05/2023] Open
Abstract
Autism spectrum disorder (ASD) is a heterogeneous category of developmental psychiatric disorders which is characterized by inadequate social interaction, less communication, and repetitive phenotype behavior. ASD is comorbid with various types of disorders. The reported prevalence is 1% in the United Kingdom, 1.5% in the United States, and ~0.2% in India at present. The natural anti-inflammatory agents on brain development are linked to interaction with many types of inflammatory pathways affected by genetic, epigenetic, and environmental variables. Inflammatory targeting pathways have already been linked to ASD. However, these routes are diluted, and new strategies are being developed in natural anti-inflammatory medicines to treat ASD. This review summarizes the numerous preclinical and clinical studies having potential protective effects and natural anti-inflammatory agents on the developing brain during pregnancy. Inflammation during pregnancy activates the maternal infection that likely leads to the development of neuropsychiatric disorders in the offspring. The inflammatory pathways have been an effective target for the subject of translational research studies on ASD.
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7
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Ciaston I, Dobosz E, Potempa J, Koziel J. The subversion of toll-like receptor signaling by bacterial and viral proteases during the development of infectious diseases. Mol Aspects Med 2022; 88:101143. [PMID: 36152458 PMCID: PMC9924004 DOI: 10.1016/j.mam.2022.101143] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/29/2022] [Accepted: 09/09/2022] [Indexed: 02/05/2023]
Abstract
Toll-like receptors (TLRs) are pattern recognition receptors (PRRs) that respond to pathogen-associated molecular patterns (PAMPs). The recognition of specific microbial ligands by TLRs triggers an innate immune response and also promotes adaptive immunity, which is necessary for the efficient elimination of invading pathogens. Successful pathogens have therefore evolved strategies to subvert and/or manipulate TLR signaling. Both the impairment and uncontrolled activation of TLR signaling can harm the host, causing tissue destruction and allowing pathogens to proliferate, thus favoring disease progression. In this context, microbial proteases are key virulence factors that modify components of the TLR signaling pathway. In this review, we discuss the role of bacterial and viral proteases in the manipulation of TLR signaling, highlighting the importance of these enzymes during the development of infectious diseases.
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Affiliation(s)
- Izabela Ciaston
- Department of Microbiology Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Ewelina Dobosz
- Department of Microbiology Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Jan Potempa
- Department of Microbiology Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland; Department of Oral Health and Systemic Disease, University of Louisville School of Dentistry, University of Louisville, Louisville, KY, USA.
| | - Joanna Koziel
- Department of Microbiology Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.
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Avbelj M, Hafner-Bratkovič I, Lainšček D, Manček-Keber M, Peternelj TT, Panter G, Treon SP, Gole B, Potočnik U, Jerala R. Cleavage-Mediated Regulation of Myd88 Signaling by Inflammasome-Activated Caspase-1. Front Immunol 2022; 12:790258. [PMID: 35069570 PMCID: PMC8767097 DOI: 10.3389/fimmu.2021.790258] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 12/15/2021] [Indexed: 01/07/2023] Open
Abstract
Coordination among multiple signaling pathways ensures an appropriate immune response, where a signaling pathway may impair or augment another signaling pathway. Here, we report a negative feedback regulation of signaling through the key innate immune mediator MyD88 by inflammasome-activated caspase-1. NLRP3 inflammasome activation impaired agonist- or infection-induced TLR signaling and cytokine production through the proteolytic cleavage of MyD88 by caspase-1. Site-specific mutagenesis was used to identify caspase-1 cleavage site within MyD88 intermediary segment. Different cleavage site location within MyD88 defined the functional consequences of MyD88 cleavage between mouse and human cells. LPS/monosodium urate–induced mouse inflammation model corroborated the physiological role of this mechanism of regulation, that could be reversed by chemical inhibition of NLRP3. While Toll/interleukin-1 receptor (TIR) domain released by MyD88 cleavage additionally contributed to the inhibition of signaling, Waldenström’s macroglobulinemia associated MyD88L265P mutation is able to evade the caspase-1-mediated inhibition of MyD88 signaling through the ability of its TIRL265P domain to recruit full length MyD88 and facilitate signaling. The characterization of this mechanism reveals an additional layer of innate immunity regulation.
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Affiliation(s)
- Monika Avbelj
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Iva Hafner-Bratkovič
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia.,EN-FIST Centre of Excellence, Ljubljana, Slovenia
| | - Duško Lainšček
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia.,EN-FIST Centre of Excellence, Ljubljana, Slovenia
| | - Mateja Manček-Keber
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia.,EN-FIST Centre of Excellence, Ljubljana, Slovenia
| | - Tina Tinkara Peternelj
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Gabriela Panter
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Steven P Treon
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, United States
| | - Boris Gole
- Centre for Human Molecular Genetics and Pharmacogenomics, Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - Uroš Potočnik
- Centre for Human Molecular Genetics and Pharmacogenomics, Faculty of Medicine, University of Maribor, Maribor, Slovenia.,Laboratory of Biochemistry, Molecular Biology and Genomics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor, Slovenia
| | - Roman Jerala
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia.,EN-FIST Centre of Excellence, Ljubljana, Slovenia
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Pustelny K, Kuska K, Gorecki A, Musielak B, Dobosz E, Wladyka B, Koziel J, Czarna A, Holak T, Dubin G. Mechanism of MyD88S mediated signal termination. Cell Commun Signal 2022; 20:10. [PMID: 35057808 PMCID: PMC8772076 DOI: 10.1186/s12964-021-00811-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 11/26/2021] [Indexed: 12/02/2022] Open
Abstract
Background A universal adaptor protein, MyD88, orchestrates the innate immune response by propagating signals from toll-like receptors (TLRs) and interleukin-1 receptor (IL-1R). Receptor activation seeds MyD88 dependent formation of a signal amplifying supramolecular organizing center (SMOC)—the myddosome. Alternatively spliced variant MyD88S, lacking the intermediate domain (ID), exhibits a dominant negative effect silencing the immune response, but the mechanistic understanding is limited. Methods Luciferase reporter assay was used to evaluate functionality of MyD88 variants and mutants. The dimerization potential of MyD88 variants and myddosome nucleation process were monitored by co-immunoprecipitation and confocal microscopy. The ID secondary structure was characterized in silico employing I-TASSER server and in vitro using nuclear magnetic resonance (NMR) and circular dichroism (CD). Results We show that MyD88S is recruited to the nucleating SMOC and inhibits its maturation by interfering with incorporation of additional components. Biophysical analysis suggests that important functional role of ID is not supported by a well-defined secondary structure. Mutagenesis identifies Tyr116 as the only essential residue within ID required for myddosome nucleation and signal propagation (NF-κB activation). Conclusions Our results argue that the largely unstructured ID of MyD88 is not only a linker separating toll-interleukin-1 receptor (TIR) homology domain and death domain (DD), but contributes intermolecular interactions pivotal in MyD88-dependent signaling. The dominant negative effect of MyD88S relies on quenching the myddosome nucleation and associated signal transduction. Video abstract
Supplementary Information The online version contains supplementary material available at 10.1186/s12964-021-00811-1.
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Li K, Lu X, Liu S, Wu X, Xie Y, Zheng X. Boron-incorporated micro/nano-topographical calcium silicate coating dictates osteo/angio-genesis and inflammatory response toward enhanced osseointegration. Biol Trace Elem Res 2021; 199:3801-3816. [PMID: 33405083 DOI: 10.1007/s12011-020-02517-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/24/2020] [Indexed: 12/12/2022]
Abstract
Orthopedic implant coatings with optimal surface features to achieve favorable osteo/angio-genesis and inflammatory response would be of great importance. However, to date, few coatings are capable of fully satisfying these requirements. In this work, to take advantage of the structural complexity of micro/nano-topography and benefits of biological trace elements, two types of boron-containing nanostructures (nanoflakes and nanolamellars) were introduced onto plasma-sprayed calcium silicate (F-BCS and L-BCS) coatings via hydrothermal treatment. The C-CS coating using deionized water as hydrothermal medium served as control. Boron-incorporated CS coating stimulated osteoblastic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs). Specifically, the combination of β1 integrin-vinculin-mediated cell spreading and activation of bone morphogenetic protein signaling pathway acted synergistically to cause significant upregulation of runt-related transcription factor 2 (RUNX2) protein and Runx2 gene expression in BMSCs on the F-BCS coating surface, which induced the transcription of downstream osteogenic differentiation marker genes. F-BCS coating allowed specific boron ion release, which favored angiogenesis as evidenced by the enhanced migration and tube formation of human umbilical vein endothelial cells in the coating extract. Boron-incorporated coatings significantly suppressed the expression of toll-like receptor adaptor genes in RAW264.7 macrophages and subsequently the degradation of nuclear factor-κB inhibitor α, accompanied by the inactivation of the downstream pro-inflammatory genes. In vivo experiments confirmed that F-BCS-coated Ti implant possessed enhanced osseointegration compared with L-BCS- and C-CS-coated implants. These data highlighted the synergistic effect of specific nanotopography and boron release from orthopedic implant coating on improvement of osseointegration.
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Affiliation(s)
- Kai Li
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Xiang Lu
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Shiwei Liu
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Xiaodong Wu
- Department of Orthopedic, Changzheng Hospital, Naval Medical University, Shanghai, People's Republic of China.
| | - Youtao Xie
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Xuebin Zheng
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
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Probiotic Composition and Chondroitin Sulfate Regulate TLR-2/4-Mediated NF-κB Inflammatory Pathway and Cartilage Metabolism in Experimental Osteoarthritis. Probiotics Antimicrob Proteins 2021; 13:1018-1032. [PMID: 33459997 DOI: 10.1007/s12602-020-09735-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2020] [Indexed: 02/07/2023]
Abstract
The therapeutic potential of using probiotics to treat osteoarthritis (OA) has only recently been recognized, with a small number of animal and human studies having been undertaken. The aim of this study was to describe the effect of a probiotic composition (PB) and chondroitin sulfate (CS), administered separately or in combination, on Tlr2, Tlr4, Nfkb1, and Comp gene expression in cartilage and levels of cytokines (IL-6, IL-8, TGF-β1, IGF-1) and COMP, ACAN, CHI3L1, CTSK, and TLR-2 in serum during monoiodoacetate (MIA)-induced OA in rats. Expression of Tlr2, Tlr4, Nfkb1, and Comp in cartilage was analyzed using one-step SYBR Green real-time RT-PCR. The levels of IL-6, IL-8, TGF-β1, IGF-1, COMP, ACAN, CHI3L1, CTSK, and TLR-2 were measured in serum by enzyme-linked immunosorbent assay. Experimental OA caused an upregulation in Tlr2, Tlr4, Nfkb1, and downregulation of Comp expression in the cartilage. MIA-OA caused a significant increase of TLR-2 soluble form and IL-6, IL-8, TGF-β1, COMP, ACAN, CHI3L1, and CTSK levels in the blood serum; the level of IGF-1, on contrary, decreased. Separate administration of PB and CS raised expression of Comp and reduced Tlr2, Tlr4, and Nfkb1 expressions in cartilage. The levels of the studied markers of cartilage metabolism in serum were decreased or increased (IGF-1). The combined use of PB and CS was more effective than separate application approaching above-mentioned parameters to control. The outcomes of our research prove that multistrain live probiotic composition amplifies the positive action of CS in osteoarthritis attenuation and necessitates further investigation with large-scale randomized controlled trial.
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12
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Shanaka KASN, Tharuka MDN, Sellaththurai S, Yang H, Priyathilaka TT, Lee J. Characterization and expression analysis of rockfish (Sebastes schlegelii) myeloid differentiation factor-88 (SsMyD88) and evaluation of its ability to induce inflammatory cytokines through NF-ĸB. FISH & SHELLFISH IMMUNOLOGY 2020; 99:59-72. [PMID: 32006686 DOI: 10.1016/j.fsi.2020.01.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/07/2020] [Accepted: 01/28/2020] [Indexed: 06/10/2023]
Abstract
Innate immunity is characterized by nonspecific, prompt reactions toward armada of antigens. Animals funnel down a repertoire of immune stimulants to activate non-selective defense mechanisms rapidly. This study was conducted to characterize the rockfish (Sebastes schlegelii) adaptor protein MyD88 (SsMyD88), which interacts with both toll-like receptors and interleukin receptors. The tissue expression of unchallenged SsMyD88 was evaluated by quantitative real time PCR (qPCR). Fish were intraperitoneally injected with immune stimulants including poly I:C, lipopolysaccharides, and Streptococcus iniae. Then, the temporal expression of SsMyD88 was analyzed. Finally, the inflammatory gene expression and downstream promoter activation were analyzed. Strongest expressions were reported in the liver, gills and spleen in unchallenged conditions. All diverse immune stimulants were found to be capable of significantly altering SsMyD88 transcription during the challenge experiment. Evaluation of downstream promoter biases by SsMyD88 found a predominant activation of NF-ĸB transcription factors when compared with the AP-1, revealing significant and substantial upregulation of major inflammatory mediators such as IL-1-β, IL-6, iNOS, COX-2 and TNF-α. Fluorescent detection confirmed an intense production of NO and the predominant differentiation of macrophages into M1 lineage with the overexpression of SsMyD88 in vitro. These results further corroborate the role of SsMyD88 as a mediatory molecule that bridges distinct immune stimulants to induce drastic immune responses in fish.
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Affiliation(s)
- K A S N Shanaka
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - M D Neranjan Tharuka
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Sarithaa Sellaththurai
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Hyerim Yang
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Thanthrige Thiunuwan Priyathilaka
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Jehee Lee
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea.
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13
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The Emerging Role of Curcumin in the Modulation of TLR-4 Signaling Pathway: Focus on Neuroprotective and Anti-Rheumatic Properties. Int J Mol Sci 2020; 21:ijms21072299. [PMID: 32225104 PMCID: PMC7177421 DOI: 10.3390/ijms21072299] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/25/2020] [Accepted: 03/24/2020] [Indexed: 12/20/2022] Open
Abstract
Natural products have been used in medicine for thousands of years. Given their potential health benefits, they have gained significant popularity in recent times. The administration of phytochemicals existed shown to regulate differential gene expression and modulate various cellular pathways implicated in cell protection. Curcumin is a natural dietary polyphenol extracted from Curcuma Longa Linn with different biological and pharmacological effects. One of the important targets of curcumin is Toll-like receptor-4 (TLR-4), the receptor which plays a key role in the modulation of the immune responses and the stimulation of inflammatory chemokines and cytokines production. Different studies have demonstrated that curcumin attenuates inflammatory response via TLR-4 acting directly on receptor, or by its downstream pathway. Curcumin bioavailability is low, so the use of exosomes, as nano drug delivery, could improve the efficacy of curcumin in inflammatory diseases. The focus of this review is to explore the therapeutic effect of curcumin interacting with TLR-4 receptor and how this modulation could improve the prognosis of neuroinflammatory and rheumatic diseases.
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14
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Shirey KA, Lai W, Brown LJ, Blanco JCG, Beadenkopf R, Wang Y, Vogel SN, Snyder GA. Select targeting of intracellular Toll-interleukin-1 receptor resistance domains for protection against influenza-induced disease. Innate Immun 2020; 26:26-34. [PMID: 31955622 PMCID: PMC6974880 DOI: 10.1177/1753425919846281] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/01/2019] [Accepted: 03/22/2019] [Indexed: 12/20/2022] Open
Abstract
TLRs are a family of PRRs that respond to PAMPs or host-derived Danger-Associated Molecular Patterns (DAMPs) to initiate host inflammation and immune responses. TLR dimerization and recruitment of adapter molecules is critical for intracellular signaling and is mediated through intracellular Toll-Interleukin 1 Receptor Resistance (TIR) domain interactions. Human TIR domains, including reported structures of TIR1, TIR2, TIR6, TIR10, TIRAP, and MyD88, contain Cysteine (Cys) interactions or modifications that are disproportionally at, or near, reported biological TIR interfaces, or in close proximity to functionally important regions. Therefore, we hypothesized that intracellular TIR Cys regulation may have greater functional importance than previously appreciated. Expression of mutant TLR4-C747S or treatment of TLR4 reporter cells with a small molecule, Cys-binding inhibitor of TLR4, TAK-242, abrogated LPS signaling in vitro . Using TAK-242, mice were protected from lethal influenza challenge as previously reported for extracellular TLR4 antagonists. Molecular modeling and sequence analysis of the region surrounding TLR4-Cys747 indicate conservation of a WxxxE motif identified among bacterial and NAD+-consuming TIRs, as well as within the TIRs domains of surface TLRs 1, 2, 4, 6, and 10. Together, these data support the hypothesis that critical Cys within the TIR domain are essential for TLR4 functionality.
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Affiliation(s)
- Kari Ann Shirey
- Department of Microbiology and Immunology, University of
Maryland School of Medicine, USA
| | - Wendy Lai
- Department of Microbiology and Immunology, University of
Maryland School of Medicine, USA
| | - Lindsey J Brown
- Institute of Human Virology, Department of Medicine, University
of Maryland School of Medicine, USA
| | | | - Robert Beadenkopf
- Institute of Human Virology, Department of Medicine, University
of Maryland School of Medicine, USA
| | - Yajing Wang
- Institute of Human Virology, Department of Medicine, University
of Maryland School of Medicine, USA
- China Pharmaceutical University, Nanjing, P.R. China
| | - Stefanie N Vogel
- Department of Microbiology and Immunology, University of
Maryland School of Medicine, USA
| | - Greg A Snyder
- Department of Microbiology and Immunology, University of
Maryland School of Medicine, USA
- Institute of Human Virology, Department of Medicine, University
of Maryland School of Medicine, USA
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15
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Hao S, Li S, Wang J, Yan Y, Ai X, Zhang J, Ren Y, Wu T, Liu L, Wang C. Phycocyanin Exerts Anti-Proliferative Effects through Down-Regulating TIRAP/NF-κB Activity in Human Non-Small Cell Lung Cancer Cells. Cells 2019; 8:E588. [PMID: 31207932 PMCID: PMC6627414 DOI: 10.3390/cells8060588] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/07/2019] [Accepted: 06/13/2019] [Indexed: 12/27/2022] Open
Abstract
Phycocyanin is a type of marine functional food additive, exerting a health care efficacy with no side effects. It has been shown that phycocyanin possesses anticancer function in non-small cell lung cancer (NSCLC) cells, but the underlying regulatory mechanism still remains unclear. Further investigation on the antineoplastic mechanism of phycocyanin would provide useful information on NSCLC treatment. In this study, we explored the in vitro function and mechanism of phycocyanin in three typical NSCLC cell lines, H1975, H1650, and LTEP-a2, for the first time. Phenotypic experiments showed that phycocyanin significantly induced the apoptosis as well as suppressed the growth of NSCLC cells. Transcriptome analysis suggested that toll/interleukin 1 receptor domain-containing adaptor protein (TIRAP) was significantly down-regulated by phycocyanin. Strikingly, similar to phycocyanin-treated assays, siRNA knockdown of TIRAP expression also resulted in the anti-proliferative phenomenon in NSCLC cells. In addition, the activity of NF-κB signaling was also suppressed after silencing TIRAP expression, revealing that phycocyanin exerted anti-proliferative function through down-regulating TIRAP/NF-κB activity in NSCLC cells. Collectively, this study has laid a theoretical basis on the treatment of NSCLC and the potential utilization of marine functional products.
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Affiliation(s)
- Shuai Hao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
| | - Shuang Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
| | - Jing Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
| | - Yan Yan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
| | - Xin Ai
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
| | - Jiawen Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
| | - Yuqing Ren
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
| | - Tingting Wu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
| | - Liyun Liu
- State Key Laboratory of Infection Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
| | - Chengtao Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China.
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16
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Dana N, Vaseghi G, Haghjooy Javanmard S. Crosstalk between Peroxisome Proliferator-Activated Receptors and Toll-Like Receptors: A Systematic Review. Adv Pharm Bull 2019; 9:12-21. [PMID: 31011554 PMCID: PMC6468223 DOI: 10.15171/apb.2019.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 01/08/2019] [Accepted: 01/12/2019] [Indexed: 12/11/2022] Open
Abstract
As one of the four major families of pattern recognition receptors (PRRs), toll like receptors (TLRs)
are crucial and important components of the innate immune system. Peroxisome proliferatoractivated
receptors (PPARs) with three isoforms are transcription factors classified as a subfamily
of nuclear receptor proteins, and are of significant regulatory activity in cellular differentiation,
development, metabolism, and tumorigenesis. It is well established that PPARs agonists display
anti-inflammatory effects through inhibition of the nuclear factor-kappa B (NF-κB) pathway, a
key regulator of immune and inflammatory responses, in a sense that TLRs signaling pathways
are mainly toward activation of NF-κB. Through a systematic review of previous studies, we
aimed to address and clarify the reciprocal interaction between TLRs and PPARs in hope to find
alternative therapeutic approaches for inflammatory diseases. Among the available scientific
database, 31 articles were selected for this review. A comprehensive review of this database
confirms the presence of a cross-talk between PPARs and TLRs, indicating that not only
PPARs stimulation may affect the expression level of TLRs via several mechanisms leading to
modulating TLRs activities, but also TLRs have the potential to moderate the expression of PPARs.
We, therefore, conclude that, as a key regulator of the innate immune system, the interaction
between PPARs and TLRs is a potential therapeutic target in disease treatment.
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Affiliation(s)
- Nasim Dana
- Applied Physiology Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Golnaz Vaseghi
- Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical sciences, Isfahan, Iran.,Applied Physiology Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Shaghayegh Haghjooy Javanmard
- Applied Physiology Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
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17
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Saenger T, Vordenbäumen S, Genich S, Haidar S, Schulte M, Nienberg C, Bleck E, Schneider M, Jose J. Human α S1-casein induces IL-8 secretion by binding to the ecto-domain of the TLR4/MD2 receptor complex. Biochim Biophys Acta Gen Subj 2018; 1863:632-643. [PMID: 30553868 DOI: 10.1016/j.bbagen.2018.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 10/22/2018] [Accepted: 12/09/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND The milk protein αS1-casein was recently reported to induce secretion of proinflammatory cytokines via Toll-like receptor 4 (TLR4). In this study, αS1-casein was identified as binder of theTLR4 ecto domain. METHODS IL-8 secretion after stimulation of TLR4/MD2 (myeloid differentiation factor 2)/CD14 (cluster of differentiation 14)-transfected HEK293 cells (TLR4+) and Mono Mac 6 cells (MM6) with recombinant αS1-casein, or LPS as control was monitored. Binding of αS1-casein to TLR4 was quantified by microscale thermophoresis (MST). RESULTS αS1-casein induced secretion of IL-8 in TLR4+ cells and in MM6 cells with a six-times higher final IL-8 concentration in supernatants. IL-8 secretion was inhibited by intracellular TLR4-domain antagonist TAK-242 with an IC50-value of 259.6 nM, by ecto-domain TLR4 antagonistic mianserin with 10-51 μM and by anti-CD14-IgA. The binding constants (KD) of αS1-casein to the TLR4, MD2, and CD14 were 2.8 μM, 0.3 μM and 2.7 μM, respectively. Finally, αS1-casein showed a higher affinity to TLR4/MD2 (KD: 2.2 μM) compared to LPS (KD: 8.2 μM). CONCLUSION Human αS1-casein induced proinflammatory effects are dependent upon binding to the TLR4 ectodomain and the presence of CD14. αS1-casein displayed stronger TLR4 agonistic activity than LPS via a different mode of action. GENERAL SIGNIFICANCE Breast milk protein αS1-casein is a proinflammatory cytokine.
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Affiliation(s)
- Thorsten Saenger
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus, Westphalian Wilhelms-University, Corrensstr. 48, 48149 Münster, Germany.
| | - Stefan Vordenbäumen
- Medical Faculty, Department of Rheumatology, Hiller Research Unit Rheumatology, Heinrich-Heine-University Düsseldorf, Moorenstr. 5, 40225 Düsseldorf, Germany.
| | - Swetlana Genich
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus, Westphalian Wilhelms-University, Corrensstr. 48, 48149 Münster, Germany.
| | - Samer Haidar
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus, Westphalian Wilhelms-University, Corrensstr. 48, 48149 Münster, Germany.
| | - Marten Schulte
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus, Westphalian Wilhelms-University, Corrensstr. 48, 48149 Münster, Germany.
| | - Christian Nienberg
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus, Westphalian Wilhelms-University, Corrensstr. 48, 48149 Münster, Germany.
| | - Ellen Bleck
- Medical Faculty, Department of Rheumatology, Hiller Research Unit Rheumatology, Heinrich-Heine-University Düsseldorf, Moorenstr. 5, 40225 Düsseldorf, Germany.
| | - Matthias Schneider
- Medical Faculty, Department of Rheumatology, Hiller Research Unit Rheumatology, Heinrich-Heine-University Düsseldorf, Moorenstr. 5, 40225 Düsseldorf, Germany.
| | - Joachim Jose
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus, Westphalian Wilhelms-University, Corrensstr. 48, 48149 Münster, Germany.
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18
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Askarian F, Wagner T, Johannessen M, Nizet V. Staphylococcus aureus modulation of innate immune responses through Toll-like (TLR), (NOD)-like (NLR) and C-type lectin (CLR) receptors. FEMS Microbiol Rev 2018; 42:656-671. [PMID: 29893825 PMCID: PMC6098222 DOI: 10.1093/femsre/fuy025] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 06/07/2018] [Indexed: 02/07/2023] Open
Abstract
Early recognition of pathogens by the innate immune system is crucial for bacterial clearance. Many pattern recognition receptors (PRRs) such as Toll-like (TLRs) and (NOD)-like (NLRs) receptors have been implicated in initial sensing of bacterial components. The intracellular signaling cascades triggered by these receptors result in transcriptional upregulation of inflammatory pathways. Although this step is crucial for bacterial elimination, it is also associated with the potential for substantial immunopathology, which underscores the need for tight control of inflammatory responses. The leading human bacterial pathogen Staphylococcus aureus expresses over 100 virulence factors that exert numerous effects upon host cells. In this manner, the pathogen seeks to avoid host recognition or perturb PRR-induced innate immune responses to allow optimal survival in the host. These immune system interactions may result in enhanced bacterial proliferation but also provoke systemic cytokine responses associated with sepsis. This review summarizes recent findings on the various mechanisms applied by S. aureus to modulate or interfere with inflammatory responses through PRRs. Detailed understanding of these complex interactions can provide new insights toward future immune-stimulatory therapeutics against infection or immunomodulatory therapeutics to suppress or correct dysregulated inflammation.
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Affiliation(s)
- Fatemeh Askarian
- Research Group of Host Microbe Interaction, Faculty of Health Sciences, UiT-The Arctic University of Norway, 9037 Tromsø, Norway
- Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, UC San Diego, La Jolla, CA 92093, USA
| | - Theresa Wagner
- Research Group of Host Microbe Interaction, Faculty of Health Sciences, UiT-The Arctic University of Norway, 9037 Tromsø, Norway
| | - Mona Johannessen
- Research Group of Host Microbe Interaction, Faculty of Health Sciences, UiT-The Arctic University of Norway, 9037 Tromsø, Norway
| | - Victor Nizet
- Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, UC San Diego, La Jolla, CA 92093, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, UC San Diego, La Jolla, CA 92093, USA
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19
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Samba-Mondonga M, Calvé A, Mallette FA, Santos MM. MyD88 Regulates the Expression of SMAD4 and the Iron Regulatory Hormone Hepcidin. Front Cell Dev Biol 2018; 6:105. [PMID: 30234111 PMCID: PMC6127602 DOI: 10.3389/fcell.2018.00105] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 08/14/2018] [Indexed: 12/26/2022] Open
Abstract
The myeloid differentiation primary response gene 88 (MyD88) is an adaptive protein that is essential for the induction of inflammatory cytokines through almost all the Toll-like receptors (TLRs). TLRs recognize molecular patterns present in microorganisms called pathogen-associated molecular patterns. Therefore, MyD88 plays an important role in innate immunity since its activation triggers the first line of defense against microorganisms. Herein, we describe the first reported role of MyD88 in an interconnection between innate immunity and the iron-sensing pathway (BMP/SMAD4). We found that direct interaction of MyD88 with SMAD4 protein activated hepcidin expression. The iron regulatory hormone hepcidin is indispensable for the intestinal regulation of iron absorption and iron recycling by macrophages. We show that MyD88 induces hepcidin expression in a manner dependent on the proximal BMP responsive element on the hepcidin gene (HAMP) promoter. We identified the Toll/interleukin-1 receptor (TIR) domain of MyD88 as the domain of interaction with SMAD4. Furthermore, we show that BMP6 stimulation, which activates SMAD6 expression, also induces MyD88 proteosomal degradation as a negative feedback mechanism to limit hepcidin induction. Finally, we report that the MyD88 gain-of-function L265P mutation, frequently encountered in B-cell lymphomas such as Waldenström’s macroglobulinemia, enhances hepcidin expression and iron accumulation in B cell lines. Our results reveal a new potential role for MyD88 in the SMAD signaling pathway and iron homeostasis regulation.
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Affiliation(s)
- Macha Samba-Mondonga
- Nutrition and Microbiome Laboratory, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada.,Département de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Annie Calvé
- Nutrition and Microbiome Laboratory, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada
| | - Frédérick A Mallette
- Département de Médecine, Université de Montréal, Montréal, QC, Canada.,Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Université de Montréal, Montréal, QC, Canada
| | - Manuela M Santos
- Nutrition and Microbiome Laboratory, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada.,Département de Médecine, Université de Montréal, Montréal, QC, Canada
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20
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Development of a Novel Backbone Cyclic Peptide Inhibitor of the Innate Immune TLR/IL1R Signaling Protein MyD88. Sci Rep 2018; 8:9476. [PMID: 29930295 PMCID: PMC6013495 DOI: 10.1038/s41598-018-27773-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 06/04/2018] [Indexed: 12/28/2022] Open
Abstract
MyD88 is a cytoplasmic adaptor protein that plays a central role in signaling downstream of the TLRs and the IL1R superfamily. We previously demonstrated that MyD88 plays a critical role in EAE, the murine model of multiple sclerosis, and showed that the MyD88 BB-loop decoy peptide RDVLPGT ameliorates EAE. We now designed and screened a library of backbone cyclized peptides based on the linear BB loop peptide, to identify a metabolically stable inhibitor of MyD88 that retains the binding properties of the linear peptide. We identified a novel cyclic peptide protein mimetic that inhibits inflammatory responses to TLR ligands, and NFκB activation in response to IL-1 activation. The inhibitor, c(MyD 4-4), is metabolically stable in comparison to the linear peptide, blocks MyD88 in a specific manner, and inhibits MyD88 function by preventing MyD88 dimerization. Finally, treatment of mice with c(MyD 4-4) reduced the severity of clinical disease in the murine EAE model of multiple sclerosis. Thus, modulation of MyD88-dependent signaling using c(MyD 4-4) is a potential therapeutic strategy to lower innate immune inflammation in autoimmune CNS disease.
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21
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Saqib U, Baig MS. Identifying the inhibition of TIR proteins involved in TLR signalling as an anti-inflammatory strategy. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2018; 29:295-318. [PMID: 29448819 DOI: 10.1080/1062936x.2018.1431308] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/18/2018] [Indexed: 06/08/2023]
Abstract
Toll/IL1 receptor (TIR) adaptor proteins continue to be an integral part of Toll-like receptors' (TLR) signalling involved in inflammation. Signalling is likely to be initiated by these TIR adaptors when they are recruited to a TIR-TIR interface formed by TLR dimerization. Among these, myeloid differentiation factor-88 (MyD88), MyD88 adapter-like protein (Mal), TIR domain-containing adaptor protein inducing interferon-β (TRIF) and TRIF-related adaptor molecule (TRAM) play pivotal roles at many steps in the signalling events leading to inflammation. The presence of the conserved BB loop residues in the TIR domain of all these important adaptor proteins make them possible targets for inhibition by synthetic compounds. We have designed compounds based on an already known MyD88 TIR dimerization inhibitor, T6167923, which binds well not only to the original target but also to the TIR domains of Mal, TRIF and TRAM. The designed inhibitors are based on modifications of the bromophenyl-sulphonyl-thiophenyl-piperazine-carboxamide series of compounds. We have further suggested modifications in these high-affinity compounds for efficient absorption inside the body. Further, a pharmacophore model highlighting important structural interaction features has been developed. The screened compounds are better in binding to the TIR proteins then the parent compound and hence are good starting points for multi-TIR inhibition.
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Affiliation(s)
- U Saqib
- a Discipline of Chemistry, School of Basic Sciences , Indian Institute of Technology (IIT) , Indore , MP , India
| | - M S Baig
- b Discipline of Biosciences and Biomedical Engineering (BSBE) , Indian Institute of Technology (IIT) , Indore - 452020 , MP , India
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22
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Dishon S, Cohen SJ, Cohen IR, Nussbaum G. Inhibition of Myeloid Differentiation Factor 88 Reduces Human and Mouse T-Cell Interleukin-17 and IFNγ Production and Ameliorates Experimental Autoimmune Encephalomyelitis Induced in Mice. Front Immunol 2017; 8:615. [PMID: 28611775 PMCID: PMC5447018 DOI: 10.3389/fimmu.2017.00615] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 05/09/2017] [Indexed: 01/05/2023] Open
Abstract
Myeloid differentiation factor 88 (MyD88) recruits signaling proteins to the intracellular domain of receptors belonging to the toll-like/interleukin-1 (IL-1) receptor superfamily. Mice lacking MyD88 are highly susceptible to infectious diseases, but tend to resist experimentally induced autoimmune diseases such as experimental autoimmune encephalomyelitis (EAE) and manifest diminished allograft rejection. We reasoned that inhibition of MyD88 should influence the cytokine profile of responding T cells by blocking costimulatory molecule expression by antigen-presenting cells (APCs) and by inhibiting T-cell responses to IL-18. We now report that inhibition of MyD88 in human APCs led to decreased IFNγ and IL-17 production and a shift to IL-4 production by responding T cells in a mixed lymphocyte reaction. Direct inhibition of Myd88 in mouse and human T cells also reduced their production of IFNγ in response to IL-12/IL-18 stimulation. Finally, systemic MyD88 antagonism significantly reduced the clinical manifestations of EAE in mice. Thus, MyD88 appears to be a key factor in determining T cell phenotype and represents a potential target for therapeutic intervention.
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Affiliation(s)
- Shira Dishon
- Institute of Dental Sciences, Hebrew University-Hadassah Faculty of Dental Medicine, Jerusalem, Israel
| | - Shmuel J Cohen
- Institute of Dental Sciences, Hebrew University-Hadassah Faculty of Dental Medicine, Jerusalem, Israel.,Department of Immunology, Weizmann Institute of Science, Rehovot, Israel
| | - Irun R Cohen
- Department of Immunology, Weizmann Institute of Science, Rehovot, Israel
| | - Gabriel Nussbaum
- Institute of Dental Sciences, Hebrew University-Hadassah Faculty of Dental Medicine, Jerusalem, Israel
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De Buck M, Gouwy M, Wang JM, Van Snick J, Opdenakker G, Struyf S, Van Damme J. Structure and Expression of Different Serum Amyloid A (SAA) Variants and their Concentration-Dependent Functions During Host Insults. Curr Med Chem 2017; 23:1725-55. [PMID: 27087246 PMCID: PMC5405626 DOI: 10.2174/0929867323666160418114600] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 03/31/2016] [Accepted: 04/15/2016] [Indexed: 12/23/2022]
Abstract
Serum amyloid A (SAA) is, like C-reactive protein (CRP), an acute phase protein and can be used as a diagnostic, prognostic or therapy follow-up marker for many diseases. Increases in serum levels of SAA are triggered by physical insults to the host, including infection, trauma, inflammatory reactions and cancer. The order of magnitude of increase in SAA levels varies considerably, from a 10- to 100-fold during limited inflammatory events to a 1000-fold increase during severe bacterial infections and acute exacerbations of chronic inflammatory diseases. This broad response range is reflected by SAA gene duplications resulting in a cluster encoding several SAA variants and by multiple biological functions of SAA. SAA variants are single-domain proteins with simple structures and few post-translational modifications. SAA1 and SAA2 are inducible by inflammatory cytokines, whereas SAA4 is constitutively produced. We review here the regulated expression of SAA in normal and transformed cells and compare its serum levels in various disease states. At low concentrations (10-100 ng/ml), early in an inflammatory response, SAA induces chemokines or matrix degrading enzymes via Toll-like receptors and functions as an activator and chemoattractant through a G protein-coupled receptor. When an infectious or inflammatory stimulus persists, the liver continues to produce more SAA (> 1000 ng/ml) to become an antimicrobial agent by functioning as a direct opsonin of bacteria or by interference with virus infection of host cells. Thus, SAA regulates innate and adaptive immunity and this information may help to design better drugs to treat specific diseases.
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Affiliation(s)
| | | | | | | | | | | | - Jo Van Damme
- University of Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Laboratory of Molecular Immunology, Minderbroedersstraat 10, 3000 Leuven, Belgium.
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24
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Vu A, Calzadilla A, Gidfar S, Calderon-Candelario R, Mirsaeidi M. Toll-like receptors in mycobacterial infection. Eur J Pharmacol 2016; 808:1-7. [PMID: 27756604 DOI: 10.1016/j.ejphar.2016.10.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 10/04/2016] [Accepted: 10/14/2016] [Indexed: 10/20/2022]
Abstract
Toll-like receptors are transmembrane glycoproteins predominantly expressed in tissues with immune function. They are considered one of the most important pattern recognition receptor families discovered at the end of 20th century and a key aspect of the innate immune system response to infectious disease. Here we present a review of the current knowledge of individual Toll-like receptors, 1 through 13, with a focus on their role in the immune system response to mycobacterial infection. We present literature to date about the Toll-like receptors structure, localization and expression, signaling pathways, and function. The Toll-like receptor family may have proven an important role in the immune system response to mycobacterial infections, including M. tuberculosis and non-tuberculous (NTM) organisms.
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Affiliation(s)
- Ann Vu
- Department of Medicine, University of Miami, 1600 NW, Miami, FL 33136, USA.
| | - Andrew Calzadilla
- Department of Medicine, University of Miami, 1600 NW, Miami, FL 33136, USA.
| | - Sanaz Gidfar
- Department of Medicine, University of Miami, 1600 NW, Miami, FL 33136, USA.
| | - Rafael Calderon-Candelario
- Division of Pulmonary and Critical Care, University of Miami, 1600 NW, Miami, FL 33136, USA; Miami VA Medical Center, 1201 N.W. 16th St., Miami, FL 33125, USA.
| | - Mehdi Mirsaeidi
- Division of Pulmonary and Critical Care, University of Miami, 1600 NW, Miami, FL 33136, USA; Miami VA Medical Center, 1201 N.W. 16th St., Miami, FL 33125, USA.
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Goulopoulou S, McCarthy CG, Webb RC. Toll-like Receptors in the Vascular System: Sensing the Dangers Within. Pharmacol Rev 2016; 68:142-67. [PMID: 26721702 DOI: 10.1124/pr.114.010090] [Citation(s) in RCA: 166] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Toll-like receptors (TLRs) are components of the innate immune system that respond to exogenous infectious ligands (pathogen-associated molecular patterns, PAMPs) and endogenous molecules that are released during host tissue injury/death (damage-associated molecular patterns, DAMPs). Interaction of TLRs with their ligands leads to activation of downstream signaling pathways that induce an immune response by producing inflammatory cytokines, type I interferons (IFN), and other inflammatory mediators. TLR activation affects vascular function and remodeling, and these molecular events prime antigen-specific adaptive immune responses. Despite the presence of TLRs in vascular cells, the exact mechanisms whereby TLR signaling affects the function of vascular tissues are largely unknown. Cardiovascular diseases are considered chronic inflammatory conditions, and accumulating data show that TLRs and the innate immune system play a determinant role in the initiation and development of cardiovascular diseases. This evidence unfolds a possibility that targeting TLRs and the innate immune system may be a novel therapeutic goal for these conditions. TLR inhibitors and agonists are already in clinical trials for inflammatory conditions such as asthma, cancer, and autoimmune diseases, but their study in the context of cardiovascular diseases is in its infancy. In this article, we review the current knowledge of TLR signaling in the cardiovascular system with an emphasis on atherosclerosis, hypertension, and cerebrovascular injury. Furthermore, we address the therapeutic potential of TLR as pharmacological targets in cardiovascular disease and consider intriguing research questions for future study.
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Affiliation(s)
- Styliani Goulopoulou
- Institute for Cardiovascular and Metabolic Diseases, Department of Obstetrics and Gynecology, University of North Texas Health Science Center, Fort Worth, Texas; and Department of Physiology, Augusta University, Augusta, Georgia
| | - Cameron G McCarthy
- Institute for Cardiovascular and Metabolic Diseases, Department of Obstetrics and Gynecology, University of North Texas Health Science Center, Fort Worth, Texas; and Department of Physiology, Augusta University, Augusta, Georgia
| | - R Clinton Webb
- Institute for Cardiovascular and Metabolic Diseases, Department of Obstetrics and Gynecology, University of North Texas Health Science Center, Fort Worth, Texas; and Department of Physiology, Augusta University, Augusta, Georgia
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26
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Woller SA, Ravula SB, Tucci FC, Beaton G, Corr M, Isseroff RR, Soulika AM, Chigbrow M, Eddinger KA, Yaksh TL. Systemic TAK-242 prevents intrathecal LPS evoked hyperalgesia in male, but not female mice and prevents delayed allodynia following intraplantar formalin in both male and female mice: The role of TLR4 in the evolution of a persistent pain state. Brain Behav Immun 2016; 56:271-80. [PMID: 27044335 PMCID: PMC4917460 DOI: 10.1016/j.bbi.2016.03.026] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 03/22/2016] [Accepted: 03/31/2016] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE Pain resulting from local tissue injury or inflammation typically resolves with time. Frequently, however, this pain may unexpectedly persist, becoming a pathological chronic state. Increasingly, the innate and adaptive immune systems are being implicated in the initiation and maintenance of these persistent conditions. In particular, Toll-like receptor 4 (TLR4) signaling has been shown to mediate the transition to a persistent pain state in a sex-dependent manner. In the present work, we explored this contribution using the TLR4 antagonist, TAK-242. METHODS Male and female C57Bl/6 mice were given intravenous (IV), intrathecal (IT), or intraperitoneal (IP) TAK-242 prior to IT delivery of lipopolysaccharide (LPS), and tactile reactivity was assessed at regular intervals over 72-h. Additional groups of mice were treated with IP TAK-242 prior to intraplantar formalin, and flinching was monitored for 1-h. Tactile reactivity was assessed at 7-days after formalin delivery. RESULTS LPS evoked TNF release from male and female macrophages and RAW267.4 cells, which was blocked in a concentration dependent fashion by TAK-242. In vivo, IT LPS evoked tactile allodynia to a greater degree in male than female mice. TAK-242, given by all routes, prevented development of IT LPS-induced tactile allodynia in male animals, but did not reverse their established allodynia. TLR4 deficiency and TAK-242 treatment attenuated IT LPS-induced allodynia in male, but not female mice. In the formalin model, pre-treatment with TAK-242 did not affect Phase 1 or Phase 2 flinching, but prevented the delayed tactile allodynia in both male and unexpectedly in female mice (Phase 3). CONCLUSIONS Together, these results suggest that TAK-242 is a TLR4 antagonist that has efficacy after systemic and intrathecal delivery and confirms the role of endogenous TLR4 signaling in triggering the development of a delayed allodynia in both male and female mice.
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Affiliation(s)
- Sarah A Woller
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA; Department of Medicine, Division of Rheumatology, Allergy, and Immunology, University of California San Diego, La Jolla, CA, USA.
| | - Satheesh B Ravula
- Epigen Biosciences Inc., 10225 Barnes Canyon Road, Suite A104, San Diego, CA 92121, USA.
| | - Fabio C Tucci
- Epigen Biosciences Inc., 10225 Barnes Canyon Road, Suite A104, San Diego, CA 92121, USA.
| | - Graham Beaton
- Epigen Biosciences Inc., 10225 Barnes Canyon Road, Suite A104, San Diego, CA 92121, USA.
| | - Maripat Corr
- Department of Medicine, Division of Rheumatology, Allergy, and Immunology, University of California San Diego, La Jolla, CA, USA.
| | - R Rivkah Isseroff
- Department of Dermatology, School of Medicine, University of California, Davis, CA, USA.
| | - Athena M Soulika
- Department of Dermatology, School of Medicine, University of California, Davis, CA, USA; Shriners Hospital for Children, Northern California, Sacramento, CA, USA.
| | - Marianne Chigbrow
- Department of Dermatology, School of Medicine, University of California, Davis, CA, USA.
| | - Kelly A Eddinger
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA.
| | - Tony L Yaksh
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA.
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Beppler J, Mkaddem SB, Michaloski J, Honorato RV, Velasco IT, de Oliveira PSL, Giordano RJ, Monteiro RC, Pinheiro da Silva F. Negative regulation of bacterial killing and inflammation by two novel CD16 ligands. Eur J Immunol 2016; 46:1926-35. [PMID: 27226142 DOI: 10.1002/eji.201546118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 04/14/2016] [Accepted: 05/23/2016] [Indexed: 12/14/2022]
Abstract
Sepsis, a leading cause of death worldwide, involves exacerbated proinflammatory responses and inefficient bacterial clearance. Phagocytic cells play a crucial part in the prevention of sepsis by clearing bacteria through host innate receptors. Here, we used a phage display library to identify two peptides in Escherichia coli that interact with host innate receptors. One of these peptides, encoded by the wzxE gene of E. coli K-12, was involved in the transbilayer movement of a trisaccharide-lipid intermediate in the assembly of enterobacterial common antigen. Peptide-receptor interactions induced CD16-mediated inhibitory immunoreceptor tyrosine-based activating motif signaling, blocking the production of ROS and bacterial killing. This CD16-mediated inhibitory signaling was abrogated in a WzxE(-/-) mutant of E. coli K-12, restoring the production of ROS and bacterial killing. Taken together, the two novel CD16 ligands identified negatively regulate bacterial killing and inflammation. Our findings may contribute toward the development of new immunotherapies for E. coli-mediated infectious diseases and inflammation.
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Affiliation(s)
- Jaqueline Beppler
- Emergency Medicine Department, University of Sao Paulo, Sao Paulo, Brazil
| | - Sanae Ben Mkaddem
- Inserm Unit 1149 and ERL CNRS 8252, Center for Research on Inflammation, University Paris Diderot, Paris, France
| | - Jussara Michaloski
- Vascular Biology Laboratory, Chemistry Institute, University of Sao Paulo, Sao Paulo, Brazil
| | | | | | | | - Ricardo José Giordano
- Vascular Biology Laboratory, Chemistry Institute, University of Sao Paulo, Sao Paulo, Brazil
| | - Renato C Monteiro
- Inserm Unit 1149 and ERL CNRS 8252, Center for Research on Inflammation, University Paris Diderot, Paris, France
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28
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Pierzchalska M, Grabacka M. The potential role of some phytochemicals in recognition of mitochondrial damage-associated molecular patterns. Mitochondrion 2016; 30:24-34. [PMID: 27288721 DOI: 10.1016/j.mito.2016.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 06/05/2016] [Accepted: 06/07/2016] [Indexed: 02/07/2023]
Abstract
Mitochondria are the source of damage-associated molecular patterns (DAMPs). DAMPs modulate responses to stress and trauma in animals, influencing the onset of many diseases. Dietary phytochemicals, which target various cellular molecules, are potential modulators of immunological status. In this review the existence of the possible impact of some plant-derived compounds with proven anti-cancer and anti-inflammatory properties (isothiocyanates and curcumin) on DAMPs recognition is highlighted. Special consideration is given to the mtDNA recognizing Toll-like receptor 9 and formyl peptide receptors. In the context of the phytochemicals action, the role of these receptors in epithelial homeostasis is also discussed.
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Affiliation(s)
- Malgorzata Pierzchalska
- Department of Food Biotechnology, Faculty of Food Technology, The University of Agriculture in Kraków, Poland.
| | - Maja Grabacka
- Department of Food Biotechnology, Faculty of Food Technology, The University of Agriculture in Kraków, Poland
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29
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Daringer NM, Schwarz KA, Leonard JN. Contributions of unique intracellular domains to switchlike biosensing by Toll-like receptor 4. J Biol Chem 2015; 290:8764-77. [PMID: 25694428 DOI: 10.1074/jbc.m114.610063] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Indexed: 01/23/2023] Open
Abstract
Toll-like receptors (TLRs) mediate immune recognition of both microbial infections and tissue damage. Aberrant TLR signaling promotes disease; thus, understanding the regulation of TLR signaling is of medical relevance. Although downstream mediators of TLR signaling have been identified, the detailed mechanism by which ligand binding-mediated dimerization induces downstream signaling remains poorly understood. Here, we investigate this question for TLR4, which mediates responsiveness to bacterial LPS and drives inflammatory disease. TLR4 exhibits structural and functional features that are unique among TLRs, including responsiveness to a wide variety of ligands. However, the connection between these structural features and the regulation of signaling is not clear. Here, we investigated how the unique intracellular structures of TLR4 contribute to receptor signaling. Key conclusions include the following. 1) The unique intracellular linker of TLR4 is important for achieving LPS-inducible signaling via Toll/IL-1 receptor (TIR) domain-containing adapter-inducing interferon-β (TRIF) but less so for signaling via myeloid differentiation primary response 88 (MyD88). 2) Membrane-bound TLR4 TIR domains were sufficient to induce signaling. However, introducing long, flexible intracellular linkers neither induced constitutive signaling nor ablated LPS-inducible signaling. Thus, the initiation of TLR4 signaling is regulated by a mechanism that does not require tight geometric constraints. Together, these observations necessitate refining the model of TLR4 signal initiation. We hypothesize that TLR4 may interact with an inhibitory partner in the absence of ligand, via both TIR and extracellular domains of TLR4. In this speculative model, ligand binding induces dissociation of the inhibitory partner, triggering spontaneous, switchlike TIR domain homodimerization to initiate downstream signaling.
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Affiliation(s)
| | | | - Joshua N Leonard
- From the Department of Chemical and Biological Engineering, the Chemistry of Life Processes Institute, and the Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Evanston, Illinois 60208
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30
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Narayanan KB, Park HH. Toll/interleukin-1 receptor (TIR) domain-mediated cellular signaling pathways. Apoptosis 2015; 20:196-209. [DOI: 10.1007/s10495-014-1073-1] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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31
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Chaudhary D, Robinson S, Romero DL. Recent Advances in the Discovery of Small Molecule Inhibitors of Interleukin-1 Receptor-Associated Kinase 4 (IRAK4) as a Therapeutic Target for Inflammation and Oncology Disorders. J Med Chem 2014; 58:96-110. [DOI: 10.1021/jm5016044] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Divya Chaudhary
- Nimbus Discovery, 25 First Street,
Suite 404, Cambridge, Massachusetts 02141, United States
| | - Shaughnessy Robinson
- Schrödinger Inc., 120 West Forty-Fifth
Street, New York, New York 10036, United States
| | - Donna L. Romero
- Nimbus Discovery, 25 First Street,
Suite 404, Cambridge, Massachusetts 02141, United States
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32
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Patel MC, Shirey KA, Pletneva LM, Boukhvalova MS, Garzino-Demo A, Vogel SN, Blanco JC. Novel drugs targeting Toll-like receptors for antiviral therapy. Future Virol 2014; 9:811-829. [PMID: 25620999 DOI: 10.2217/fvl.14.70] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Toll-like receptors (TLRs) are sentinel receptors of the host innate immune system that recognize conserved 'pathogen-associated molecular patterns' of invading microbes, including viruses. The activation of TLRs establishes antiviral innate immune responses and coordinates the development of long-lasting adaptive immunity in order to control viral pathogenesis. However, microbe-induced damage to host tissues may release 'danger-associated molecular patterns' that also activate TLRs, leading to an overexuberant inflammatory response and, ultimately, to tissue damage. Thus, TLRs have proven to be promising targets as therapeutics for the treatment of viral infections that result in inflammatory damage or as adjuvants in order to enhance the efficacy of vaccines. Here, we explore recent advances in TLR biology with a focus on novel drugs that target TLRs (agonists and antagonists) for antiviral therapy.
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Affiliation(s)
- Mira C Patel
- Department of Microbiology & Immunology, University of Maryland, School of Medicine, Baltimore, MD 21201, USA
| | - Kari Ann Shirey
- Department of Microbiology & Immunology, University of Maryland, School of Medicine, Baltimore, MD 21201, USA
| | | | | | - Alfredo Garzino-Demo
- Department of Microbiology & Immunology, University of Maryland, School of Medicine, Baltimore, MD 21201, USA ; Institute of Human Virology, University of Maryland, School of Medicine, Baltimore, MD 21201, USA
| | - Stefanie N Vogel
- Department of Microbiology & Immunology, University of Maryland, School of Medicine, Baltimore, MD 21201, USA
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Seok H, Suh DW, Jo B, Lee HB, Jang HM, Park HK, Lew BL, Chung JH, Sim WY. Association between TLR1 polymorphisms and alopecia areata. Autoimmunity 2014; 47:372-7. [DOI: 10.3109/08916934.2014.910769] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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34
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Targeting toll-like receptors 4 intracellular domain to prevent ischemic liver disease: an innovative approach or just a futuristic dream? Crit Care Med 2014; 42:487-8. [PMID: 24434465 DOI: 10.1097/ccm.0000000000000005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Loiarro M, Volpe E, Ruggiero V, Gallo G, Furlan R, Maiorino C, Battistini L, Sette C. Mutational analysis identifies residues crucial for homodimerization of myeloid differentiation factor 88 (MyD88) and for its function in immune cells. J Biol Chem 2013; 288:30210-30222. [PMID: 24019529 DOI: 10.1074/jbc.m113.490946] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Myeloid differentiation factor 88 (MyD88) is an adaptor protein that transduces intracellular signaling pathways evoked by the Toll-like receptors (TLRs) and interleukin-1 receptors (IL-1Rs). MyD88 is composed of an N-terminal death domain (DD) and a C-terminal Toll/IL-1 receptor (TIR) domain, separated by a short region. Upon ligand binding, TLR/IL-1Rs hetero- or homodimerize and recruit MyD88 through their respective TIR domains. Then, MyD88 oligomerizes via its DD and TIR domain and interacts with the interleukin-1 receptor-associated kinases (IRAKs) to form the Myddosome complex. We performed site-directed mutagenesis of conserved residues that are located in exposed regions of the MyD88-TIR domain and analyzed the effect of the mutations on MyD88 signaling. Our studies revealed that mutation of Glu(183), Ser(244), and Arg(288) impaired homodimerization of the MyD88-TIR domain, recruitment of IRAKs, and activation of NF-κB. Moreover, overexpression of two green fluorescent protein (GFP)-tagged MyD88 mini-proteins (GFP-MyD88151-189 and GFP-MyD88168-189), comprising the Glu(183) residue, recapitulated these effects. Importantly, expression of these dominant negative MyD88 mini-proteins competed with the function of endogenous MyD88 and interfered with TLR2/4-mediated responses in a human monocytic cell line (THP-1) and in human primary monocyte-derived dendritic cells. Thus, our studies identify novel residues of the TIR domain that are crucially involved in MyD88 homodimerization and TLR signaling in immune cells.
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Affiliation(s)
- Maria Loiarro
- From the Department of Biomedicine and Prevention, University of Rome "Tor Vergata", 00133 Rome, Italy,; the Laboratory of Neuroembryology and
| | - Elisabetta Volpe
- Laboratory of Neuroimmunology, Santa Lucia Foundation, 00143 Rome, Italy
| | - Vito Ruggiero
- the Research & Development Sigma-Tau S.p.A., 00040 Pomezia (Rome), Italy, and
| | - Grazia Gallo
- the Research & Development Sigma-Tau S.p.A., 00040 Pomezia (Rome), Italy, and
| | - Roberto Furlan
- the Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Chiara Maiorino
- the Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Luca Battistini
- Laboratory of Neuroimmunology, Santa Lucia Foundation, 00143 Rome, Italy
| | - Claudio Sette
- From the Department of Biomedicine and Prevention, University of Rome "Tor Vergata", 00133 Rome, Italy,; the Laboratory of Neuroembryology and.
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36
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Patterson NJ, Werling D. To con protection: TIR-domain containing proteins (Tcp) and innate immune evasion. Vet Immunol Immunopathol 2013; 155:147-54. [PMID: 23871438 DOI: 10.1016/j.vetimm.2013.06.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Revised: 06/17/2013] [Accepted: 06/26/2013] [Indexed: 01/07/2023]
Abstract
The innate immune system provides the host's first line of defence against invading pathogens. Key to the stimulation of the innate immune response is pattern-recognition receptors (PRRs), such as Toll-like receptors (TLRs), which recognize microbial-associated molecular patterns (MAMPs). Binding of MAMPs to TLRs triggers a signalling cascade resulting in the production of pro-inflammatory mediators. Central to this TLR signalling pathway are heterotypic protein-protein interactions mediated through Toll/interleukin-1 receptor (TIR) domains found in both the cytoplasmic regions of TLRs and several key adaptor proteins. Interestingly, TIR-domain containing proteins (Tcps) do not seem to be unique to the mammalian TLR system, but occurs in abundance in many biological forms. Recent evidence suggests that pathogenic bacteria have developed a range of ingenuous strategies to evade the host immune mechanisms involving Tcps. There is increasing evidence to suggest that these pathogen-encoded Tcps interfere directly with the TLR signalling pathway and thus inhibit the activation of NF-κB, with different modes of action and roles in virulence. Here, we review the current state of knowledge on the possible roles and mechanisms of action of bacterial encoded Tcp.
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Affiliation(s)
- Nicholas J Patterson
- Molecular Immunology Group, Department of Pathology and Pathogen Biology, Royal Veterinary College, Hawkshead Lane, Hatfield AL9 7TA, UK
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