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Li F, Song B, Zhou WF, Chu LJ. Toll-Like Receptors 7/8: A Paradigm for the Manipulation of Immunologic Reactions for Immunotherapy. Viral Immunol 2023; 36:564-578. [PMID: 37751284 DOI: 10.1089/vim.2023.0077] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023] Open
Abstract
The innate immune system recognizes conserved features of viral and microbial pathogens through pattern recognition receptors (PRRs). Toll-like receptors (TLRs) are one type of PRR used by the innate immune system to mediate the secretion of proinflammatory cytokines and promote innate and adaptive immune responses. TLR family members TLR7 and TLR8 (referred to as TLR7/8 from herein) are endosomal transmembrane receptors that recognize purine-rich single-stranded RNA (ssRNA) and bacterial DNA, eliciting an immunologic reaction to pathogens. TLR7/8 were discovered to mediate the secretion of proinflammatory cytokines by activating immune cells. In addition, accumulating evidence has indicated that TLR7/8 may be closely related to numerous immune-mediated disorders, specifically several types of cancer, autoimmune disease, and viral disease. TLR7/8 agonists and antagonists, which are used as drugs or adjuvants, have been identified in preclinical studies and clinical trials as promising immune stimulators for the immunotherapy of these immune-mediated disorders. These results provided reasoning to further explore immunotherapy for the treatment of immune-mediated disorders. Nevertheless, numerous needs remain unmet, and the therapeutic effects of TLR7/8 agonists and antagonists are poor and exert strong immune-related toxicities. The present review aimed to provide an overview of the TLR family members, particularly TLR7/8, and address the underlying molecular mechanisms and clinical implications of TLR7/8 in immune-mediated disorders. The aim of the work is to discuss the underlying molecular mechanisms and clinical implications of TLR7/8 in immune-mediated disorders.
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Affiliation(s)
- Fang Li
- Department of Clinical Medicine, Anhui Medical College, Hefei, China
| | - Biao Song
- Department of Pharmacy, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Wei-Feng Zhou
- Department of Clinical Medicine, Anhui Medical College, Hefei, China
| | - Li-Jin Chu
- Department of Clinical Medicine, Anhui Medical College, Hefei, China
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2
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Mantovani S, Oliviero B, Varchetta S, Renieri A, Mondelli MU. TLRs: Innate Immune Sentries against SARS-CoV-2 Infection. Int J Mol Sci 2023; 24:8065. [PMID: 37175768 PMCID: PMC10178469 DOI: 10.3390/ijms24098065] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/21/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has been responsible for a devastating pandemic since March 2020. Toll-like receptors (TLRs), crucial components in the initiation of innate immune responses to different pathogens, trigger the downstream production of pro-inflammatory cytokines, interferons, and other mediators. It has been demonstrated that they contribute to the dysregulated immune response observed in patients with severe COVID-19. TLR2, TLR3, TLR4 and TLR7 have been associated with COVID-19 severity. Here, we review the role of TLRs in the etiology and pathogenesis of COVID-19, including TLR7 and TLR3 rare variants, the L412F polymorphism in TLR3 that negatively regulates anti-SARS-CoV-2 immune responses, the TLR3-related cellular senescence, the interaction of TLR2 and TLR4 with SARS-CoV-2 proteins and implication of TLR2 in NET formation by SARS-CoV-2. The activation of TLRs contributes to viral clearance and disease resolution. However, TLRs may represent a double-edged sword which may elicit dysregulated immune signaling, leading to the production of proinflammatory mediators, resulting in severe disease. TLR-dependent excessive inflammation and TLR-dependent antiviral response may tip the balance towards the former or the latter, altering the equilibrium that drives the severity of disease.
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Affiliation(s)
- Stefania Mantovani
- Department of Research, Division of Clinical Immunology—Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (B.O.); (S.V.)
| | - Barbara Oliviero
- Department of Research, Division of Clinical Immunology—Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (B.O.); (S.V.)
| | - Stefania Varchetta
- Department of Research, Division of Clinical Immunology—Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (B.O.); (S.V.)
| | - Alessandra Renieri
- Medical Genetics, University of Siena, 53100 Siena, Italy;
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
- Genetica Medica, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Mario U. Mondelli
- Department of Research, Division of Clinical Immunology—Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (B.O.); (S.V.)
- Department of Internal Medicine and Therapeutics, University of Pavia, 27100 Pavia, Italy
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3
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Azatyan V, Yessayan L, Sargsyan A, Khachatryan A, Ghevondyan T, Shmavonyan M, Melik-Andreasyan G, Porksheyan K, Manrikyan M. Morphological Changes in the Oral Mucous Membrane in Viral Hepatitis C Patients: A Cross-Sectional Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19159003. [PMID: 35897373 PMCID: PMC9330065 DOI: 10.3390/ijerph19159003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 02/01/2023]
Abstract
Background: The objective was to reveal the most typical changes in oral mucosa in HCV patients and compare them with those in HCV negative patients. Methods: The study involved 96 HCV patients and 100 patients without HCV who applied to a dental clinic. The content of cytokines IL-2, IL-4, IL-10 and ɤ-INF in the oral fluid was determined by ELISA. Buccal mucosa and gums biopsies passed histological examination. An immunohistochemical study of mucous membrane biopsies was performed using monoclonal mouse antibodies to CD3+ and CD20+. Results: The HCV patients group included 96 (63.5% males), and the non-HCV group included 100 subjects (62.0% males) with lesions of the oral mucous membrane. The lesions of lips and oral mucosa were more frequent in HCV than in the non-HCV group—e.g., erosion (13.5% vs. 1%), cracks in the mouth corners (42.7% vs. 0%), changes in the oral mucosa surface (89.6% vs. 3.0%), hemorrhages (78.1% vs. 0%), etc. The pro-inflammatory IL-2 level was higher and anti-inflammatory IL-4 level was lower in HCV patients compared with those in the non-HCV group. Conclusions: Morphological changes developed in the microvasculature both worsen the tissue trophism and accelerate the healing with differentiation into coarse-fibrous connective tissue. Immunohistochemical findings indicated a decrease in local humoral immune response.
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Affiliation(s)
- Vahe Azatyan
- Department of Therapeutic Stomatology, Yerevan State Medical University (YSMU), 2 Koryun Str., Yerevan 0025, Armenia;
- Correspondence: ; Tel.: +374-91-326773
| | - Lazar Yessayan
- Department of Therapeutic Stomatology, Yerevan State Medical University (YSMU), 2 Koryun Str., Yerevan 0025, Armenia;
| | - Aelita Sargsyan
- Tuberculosis Research and Prevention Center, 6/2 Adonts Str., 100 Apt., Yerevan 0014, Armenia;
| | - Anna Khachatryan
- Department of Pathological Anatomy, Yerevan State Medical University (YSMU), 2 Koryun Str., Yerevan 0025, Armenia;
| | - Tigran Ghevondyan
- Laboratory of Histochemistry and Electron Microscopy, After Orbeli Institute of Physiology of National Academy of Sciences of Republic Armenia (NAoS RA), 22 Brothers Orbeli Str., Yerevan 0028, Armenia;
| | - Melanya Shmavonyan
- Department of Infectious Diseases, Yerevan State Medical University (YSMU), 2 Koryun Str., Yerevan 0025, Armenia;
| | - Gayane Melik-Andreasyan
- National Center of Disease Control and Prevention, Ministry of Health (MoH), 12 Mkhitar Heratsi Str., Yerevan 0025, Armenia;
| | - Kristina Porksheyan
- Department of Diagnostic Radiology, Yerevan State Medical University (YSMU), 2 Koryun Str., Yerevan 0025, Armenia;
| | - Mikael Manrikyan
- Department of Pediatric Dentistry and Orthodontics, Yerevan State Medical University (YSMU), 2 Koryun Str., Yerevan 0025, Armenia;
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4
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Rare variants in Toll-like receptor 7 results in functional impairment and downregulation of cytokine-mediated signaling in COVID-19 patients. Genes Immun 2021; 23:51-56. [PMID: 34952932 PMCID: PMC8703210 DOI: 10.1038/s41435-021-00157-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/11/2021] [Accepted: 11/22/2021] [Indexed: 11/23/2022]
Abstract
Toll-like receptors (TLR) are crucial components in the initiation of innate immune responses to a variety of pathogens, triggering the production of pro-inflammatory cytokines and type I and II interferons, which are responsible for innate antiviral responses. Among the different TLRs, TLR7 recognizes several single-stranded RNA viruses including SARS-CoV-2. We and others identified rare loss-of-function variants in X-chromosomal TLR7 in young men with severe COVID-19 and with no prior history of major chronic diseases, that were associated with impaired TLR7 signaling as well as type I and II IFN responses. Here, we performed RNA sequencing to investigate transcriptome variations following imiquimod stimulation of peripheral blood mononuclear cells isolated from patients carrying previously identified hypomorphic, hypofunctional, and loss-of-function TLR7 variants. Our investigation revealed a profound impairment of the TLR7 pathway in patients carrying loss-of-function variants. Of note, a failure in IFNγ upregulation following stimulation was also observed in cells harboring the hypofunctional and hypomorphic variants. We also identified new TLR7 variants in severely affected male patients for which a functional characterization of the TLR7 pathway was performed demonstrating a decrease in mRNA levels in the IFNα, IFNγ, RSAD2, ACOD1, IFIT2, and CXCL10 genes.
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5
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Fallerini C, Daga S, Mantovani S, Benetti E, Picchiotti N, Francisci D, Paciosi F, Schiaroli E, Baldassarri M, Fava F, Palmieri M, Ludovisi S, Castelli F, Quiros-Roldan E, Vaghi M, Rusconi S, Siano M, Bandini M, Spiga O, Capitani K, Furini S, Mari F, Renieri A, Mondelli MU, Frullanti E. Association of Toll-like receptor 7 variants with life-threatening COVID-19 disease in males: findings from a nested case-control study. eLife 2021; 10:67569. [PMID: 33650967 PMCID: PMC7987337 DOI: 10.7554/elife.67569] [Citation(s) in RCA: 132] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 02/24/2021] [Indexed: 12/26/2022] Open
Abstract
Background: Recently, loss-of-function variants in TLR7 were identified in two families in which COVID-19 segregates like an X-linked recessive disorder environmentally conditioned by SARS-CoV-2. We investigated whether the two families represent the tip of the iceberg of a subset of COVID-19 male patients. Methods: This is a nested case-control study in which we compared male participants with extreme phenotype selected from the Italian GEN-COVID cohort of SARS-CoV-2-infected participants (<60 y, 79 severe cases versus 77 control cases). We applied the LASSO Logistic Regression analysis, considering only rare variants on young male subsets with extreme phenotype, picking up TLR7 as the most important susceptibility gene. Results: Overall, we found TLR7 deleterious variants in 2.1% of severely affected males and in none of the asymptomatic participants. The functional gene expression profile analysis demonstrated a reduction in TLR7-related gene expression in patients compared with controls demonstrating an impairment in type I and II IFN responses. Conclusions: Young males with TLR7 loss-of-function variants and severe COVID-19 represent a subset of male patients contributing to disease susceptibility in up to 2% of severe COVID-19. Funding: Funded by private donors for the Host Genetics Research Project, the Intesa San Paolo for 2020 charity fund, and the Host Genetics Initiative. Clinical trial number: NCT04549831.
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Affiliation(s)
- Chiara Fallerini
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Sergio Daga
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Stefania Mantovani
- Division of Infectious Diseases and Immunology, Department of Medical Sciences and Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Elisa Benetti
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Nicola Picchiotti
- Department of Mathematics, University of Pavia, Pavia, Italy.,University of Siena, DIISM-SAILAB, Siena, Italy
| | - Daniela Francisci
- Infectious Diseases Clinic, Department of Medicine 2, Azienda Ospedaliera di Perugia and University of Perugia, Santa Maria Hospital, Perugia, Italy.,Infectious Diseases Clinic, "Santa Maria" Hospital, University of Perugia, Perugia, Italy
| | - Francesco Paciosi
- Infectious Diseases Clinic, Department of Medicine 2, Azienda Ospedaliera di Perugia and University of Perugia, Santa Maria Hospital, Perugia, Italy.,Infectious Diseases Clinic, "Santa Maria" Hospital, University of Perugia, Perugia, Italy
| | - Elisabetta Schiaroli
- Infectious Diseases Clinic, Department of Medicine 2, Azienda Ospedaliera di Perugia and University of Perugia, Santa Maria Hospital, Perugia, Italy
| | - Margherita Baldassarri
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Francesca Fava
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliero-Universitaria Senese, Siena, Italy
| | - Maria Palmieri
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Serena Ludovisi
- Division of Infectious Diseases and Immunology, Department of Medical Sciences and Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.,Department of Internal Medicine and Therapeutics, University of Pavia, Pavia, Italy
| | - Francesco Castelli
- Department of Infectious and Tropical Diseases, University of Brescia and ASST Spedali Civili Hospital, Brescia, Italy
| | - Eugenia Quiros-Roldan
- Department of Infectious and Tropical Diseases, University of Brescia and ASST Spedali Civili Hospital, Brescia, Italy
| | - Massimo Vaghi
- Chirurgia Vascolare, Ospedale Maggiore di Crema, Crema, Italy
| | - Stefano Rusconi
- Department of Biomedical and Clinical Sciences Luigi Sacco, University of Milan, Milan, Italy.,III Infectious Diseases Unit, ASST-FBF-Sacco, Milan, Italy
| | - Matteo Siano
- Department of Biomedical and Clinical Sciences Luigi Sacco, University of Milan, Milan, Italy
| | - Maria Bandini
- Department of Preventive Medicine, Azienda USL Toscana Sud Est, Siena, Italy
| | - Ottavia Spiga
- University of Siena, DIISM-SAILAB, Siena, Italy.,Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Katia Capitani
- Medical Genetics, University of Siena, Siena, Italy.,Molecular Mechanisms of Oncogenesis, ISPRO Core Research Laboratory (CRL), Firenze, Italy
| | - Simone Furini
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Francesca Mari
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliero-Universitaria Senese, Siena, Italy
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- Medical Genetics, University of Siena, Siena, Italy
| | - Alessandra Renieri
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliero-Universitaria Senese, Siena, Italy
| | - Mario U Mondelli
- Division of Infectious Diseases and Immunology, Department of Medical Sciences and Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.,Department of Internal Medicine and Therapeutics, University of Pavia, Pavia, Italy
| | - Elisa Frullanti
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
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6
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Smith S, Honegger JR, Walker C. T-Cell Immunity against the Hepatitis C Virus: A Persistent Research Priority in an Era of Highly Effective Therapy. Cold Spring Harb Perspect Med 2021; 11:cshperspect.a036954. [PMID: 32205413 PMCID: PMC7778213 DOI: 10.1101/cshperspect.a036954] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Approximately 70% of acute hepatitis C virus (HCV) infections become chronic, indicating that the virus is exceptionally well adapted to persist in humans with otherwise normal immune function. Robust, lifelong replication of this small RNA virus does not require a generalized failure of immunity. HCV effectively subverts innate and adaptive host defenses while leaving immunity against other viruses intact. Here, the role of CD4+ and CD8+ T-cell responses in control of HCV infection and their failure to prevent virus persistence in most individuals are reviewed. Two issues of practical importance remain priorities in an era of highly effective antiviral therapy for chronic hepatitis C. First, the characteristics of successful T-cell responses that promote resolution of HCV infection are considered, as they will underpin development of vaccines that prevent HCV persistence. Second, defects in T-cell immunity that facilitate HCV persistence and whether they are reversed after antiviral cure to provide protection from reinfection are also addressed.
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Affiliation(s)
- Stephanie Smith
- The Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's, Columbus, Ohio 43205, USA,Department of Pediatrics, College of Medicine, The Ohio State University, Columbus, Ohio 43004, USA
| | - Jonathan R. Honegger
- The Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's, Columbus, Ohio 43205, USA,Department of Pediatrics, College of Medicine, The Ohio State University, Columbus, Ohio 43004, USA
| | - Christopher Walker
- The Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's, Columbus, Ohio 43205, USA,Department of Pediatrics, College of Medicine, The Ohio State University, Columbus, Ohio 43004, USA
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7
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Nasir S, Majeed MI, Nawaz H, Rashid N, Ali S, Farooq S, Kashif M, Rafiq S, Bano S, Ashraf MN, Abubakar M, Ahmad S, Rehman A, Amin I. Surface enhanced Raman spectroscopy of RNA samples extracted from blood of hepatitis C patients for quantification of viral loads. Photodiagnosis Photodyn Ther 2020; 33:102152. [PMID: 33348077 DOI: 10.1016/j.pdpdt.2020.102152] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/23/2020] [Accepted: 12/14/2020] [Indexed: 01/31/2023]
Abstract
BACKGROUND Raman spectroscopy is a promising technique to analyze the body fluids for the purpose of non-invasive disease diagnosis. OBJECTIVES To develop a surface-enhanced Raman spectroscopy (SERS) based method for qualitative and quantitative analysis of HCV from blood samples. METHODS SERS was employed to characterize the Hepatitis C viral RNA extracted from different blood samples of hepatitis C virus (HCV) infected patients with predetermined viral loads in comparison with total RNA of healthy individuals. The SERS measurements were performed on 27 extracted RNA samples including low viral loads, medium viral loads, high viral loads and healthy/negative viral load samples. For this purpose, silver nanoparticles (Ag NPs) were used as SERS substrates. Furthermore, multivariate data analysis technique, Principal Component Analysis (PCA) and Partial Least Square Regression (PLSR) were also performed on SERS spectral data. RESULTS The SERS spectral features due to biochemical changes in the extracted RNA samples associated with the increasing viral loads were established which could be employed for HCV diagnostic purpose. PCA was found helpful for the differentiation between Raman spectral data of RNA extracted from hepatitis infected and healthy blood samples. PLSR model is established for the determination of viral loads in HCV positive RNA samples with 99 % accuracy. CONCLUSION SERS can be employed for qualitative and quantitative analysis of HCV from blood samples.
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Affiliation(s)
- Saira Nasir
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan
| | | | - Haq Nawaz
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan.
| | - Nosheen Rashid
- Department of Chemistry, University of Central Punjab, Lahore, Faisalabad Campus, Pakistan
| | - Saqib Ali
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan
| | - Sidra Farooq
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan
| | - Muhammad Kashif
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan
| | - Sidra Rafiq
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan
| | - Saira Bano
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan
| | | | - Muhammad Abubakar
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan
| | - Shamsheer Ahmad
- Department of Chemistry, University of Agriculture Faisalabad, 38040, Pakistan
| | - Asma Rehman
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P. O. Box 577, Jhang Road Faisalabad, Pakistan
| | - Imran Amin
- PCR Laboratory, PINUM Hospital, Faisalabad, Pakistan
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8
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Ray RB, Ray R. Hepatitis C Virus Manipulates Humans as its Favorite Host for a Long-Term Relationship. Hepatology 2019; 69:889-900. [PMID: 30102776 PMCID: PMC6351149 DOI: 10.1002/hep.30214] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 08/07/2018] [Indexed: 02/06/2023]
Abstract
Chronic hepatitis C virus (HCV) infection-associated liver disease is a global health problem. HCV often causes silent disease, and eventually progresses to end-stage liver disease. HCV infects hepatocytes; however, initial manifestation of liver disease is mostly displayed in hepatic stellate cells (HSCs), causing fibrosis/cirrhosis, and is believed to occur from inflammation in the liver. It remains unclear why HCV is not spontaneously cleared from infected liver in the majority of individuals and develops chronic infection with progressive liver disease. Direct-acting antivirals (DAAs) show excellent results in controlling viremia, although beneficial consequence in advanced liver disease remains to be understood. In this review, we highlight the current knowledge that has contributed to our understanding of the role of HCV in inflammation, immune evasion, metabolic disorders, liver pathogeneses, and efforts in vaccine development.
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Affiliation(s)
- Ratna B. Ray
- Department of Pathology, Saint Louis University, Saint Louis, Missouri 63104, USA,Department of Internal Medicine, Saint Louis University, Saint Louis, Missouri 63104, USA
| | - Ranjit Ray
- Department of Internal Medicine, Saint Louis University, Saint Louis, Missouri 63104, USA
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9
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Gupta CL, Babu Khan M, Ampasala DR, Akhtar S, Dwivedi UN, Bajpai P. Pharmacophore-based virtual screening approach for identification of potent natural modulatory compounds of human Toll-like receptor 7. J Biomol Struct Dyn 2019; 37:4721-4736. [PMID: 30661449 DOI: 10.1080/07391102.2018.1559098] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Toll-like receptor 7 (TLR7) is a transmembrane glycoprotein playing very crucial role in the signaling pathways involved in innate immunity and has been demonstrated to be useful in fighting against infectious disease by recognizing viral ssRNA & specific small molecule agonists. In order to find novel human TLR7 (hTLR7) modulators, computational ligand-based pharmacophore modeling approach was used to identify the molecular chemical features required for the modulation of hTLR7 protein. A training set of 20 TLR7 agonists with their known experimental activity was used to create pharmacophore model using 3D-QSAR pharmacophore generation (HypoGen algorithm) module in Discovery Studio. The best developed hypothesis consists of four pharmacophoric features namely, one hydrogen bond donor (HBD), one ring aromatic (RA), and two hydrophobic (HY) character. The developed hypothesis was then validated by different methods such as cost analysis, test set method, and Fischer's test method for consistency. Hence, this validated model was further employed for screening of natural hit compounds from InterBioScreen Natural product database, consisting of more than 60,000 natural compounds and derivatives. The screened hit compounds were subsequently filtered by Lipinski's rule of 5, ADME and toxicity parameters and molecular docking studies to remove the false positive rates. Finally, molecular docking analysis led to identification of the (3a'S,6a'R)-3'-(3,4-dihydroxybenzyl)-5'-(3,4-dimethoxyphenethyl)-5-ethyl-3',3a'-dihydro-2'H-spiro[indoline-3,1'-pyrrolo[3,4-c]pyrrole]-2,4',6'(5'H,6a'H)-trione (Compound ID: STOCK1N-65837) as potent hTLR7 modulator due to its better docking score and molecular interactions compared to other compounds. The result of virtual screening was further validated using molecular dynamics (MD) simulation analysis. Thus, a 30 ns MD simulation analysis revealed high stability and effective binding of STOCK1N-65837 within the binding site of hTLR7. Therefore, the present study provides confidence for the utility of the selected chemical feature based pharmacophore model to design novel TLR7 modulators with desired biological activity.
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Affiliation(s)
- Chhedi Lal Gupta
- Institute for Development of Advanced computing, ONGC Centre for Advanced studies, University of Lucknow , Lucknow , UP , India.,Molecular Immunology Laboratory, Department of Biosciences, Integral University , Lucknow , UP , India
| | - Mohd Babu Khan
- Centre for Bioinformatics, School of Life Sciences, Pondicherry University , Puducherry , India
| | - Dinakara Rao Ampasala
- Centre for Bioinformatics, School of Life Sciences, Pondicherry University , Puducherry , India
| | - Salman Akhtar
- Department of Bioengineering, Integral University , Lucknow , UP , India
| | - Upendra Nath Dwivedi
- Institute for Development of Advanced computing, ONGC Centre for Advanced studies, University of Lucknow , Lucknow , UP , India.,Department of Biochemistry, Centre of Excellence in Bioinformatics, Bioinformatics Infrastructure Facility, University of Lucknow , Lucknow , UP , India
| | - Preeti Bajpai
- Molecular Immunology Laboratory, Department of Biosciences, Integral University , Lucknow , UP , India
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10
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Urbanowicz A, Zagożdżon R, Ciszek M. Modulation of the Immune System in Chronic Hepatitis C and During Antiviral Interferon-Free Therapy. Arch Immunol Ther Exp (Warsz) 2018; 67:79-88. [PMID: 30443787 PMCID: PMC6420452 DOI: 10.1007/s00005-018-0532-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 11/08/2018] [Indexed: 02/06/2023]
Abstract
The treatment of patients with chronic hepatitis C virus (HCV) infection has changed tremendously over the past 2 years, with an increasing variety of all-oral direct-acting antiviral (DAA) treatment regimens available for different HCV genotypes and distinct clinical settings. These treatments have significantly improved safety in patients with advanced liver disease compared with interferon (IFN)-based regimens. HCV modifies the human immune system to escape immunosurveillance via several mechanisms. One of the basic mechanisms of HCV is the ability to “switch” the immune response by reducing the activity of cells responsible for the elimination of virus-infected cells. IFN-free DAA treatment regimens provide a unique opportunity to assess the effect of HCV elimination on the immune system. Abrupt changes in the immune system can in some cases be responsible for two alarming processes: viral reactivation in patients with chronic hepatitis B and recurrence of hepatocellular carcinoma in patients with previous successful cancer treatment.
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Affiliation(s)
- Arkadiusz Urbanowicz
- Department of Immunology, Transplant Medicine and Internal Diseases, Medical University of Warsaw, Warsaw, Poland
| | - Radosław Zagożdżon
- Department of Immunology, Transplant Medicine and Internal Diseases, Medical University of Warsaw, Warsaw, Poland.,Department of Clinical Immunology, Medical University of Warsaw, Warsaw, Poland.,Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Michał Ciszek
- Department of Immunology, Transplant Medicine and Internal Diseases, Medical University of Warsaw, Warsaw, Poland.
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Shu Z, He W, Shahen M, Guo Z, Shu J, Wu T, Bian X, Shar AH, Farag MR, Alagawany M, Liu C. Clarifying of the potential mechanism of Sinisan formula for treatment of chronic hepatitis by systems pharmacology method. Biomed Pharmacother 2018; 100:532-550. [PMID: 29482047 DOI: 10.1016/j.biopha.2018.02.047] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 02/09/2018] [Accepted: 02/13/2018] [Indexed: 01/08/2023] Open
Abstract
Chronic hepatitis is a general designation class of diseases, which results in different degrees of liver necrosis and inflammatory reaction, followed by liver fibrosis, may eventually develop into cirrhosis. However, the molecular pathogenesis of chronic hepatitis is too complex to elucidate. Herbal medicines, featured with multiple targets and compounds, have long displayed therapeutic effect in treating chronic hepatitis, though their molecular mechanisms of contribution remain indistinct. This research utilized the network pharmacology to confirm the molecular pathogenesis of chronic hepatitis through providing a comprehensive analysis of active chemicals, drug targets and pathways' interaction of Sinisan formula for treating chronic hepatitis. The outcomes showed that 80 active ingredients of Sinisan formula interacting with 91 therapeutic proteins were authenticated. Sinisan formula potentially participates in immune modulation, anti-inflammatory and antiviral activities, even has regulating effects on lipid metabolism. These mechanisms directly or indirectly are involved in curing chronic hepatitis by an interaction way. The network pharmacology based analysis demonstrated that Sinisan has multi-scale curative activity in regulating chronic hepatitis related biological processes, which provides a new potential way for modern medicine in the treatment of chronic diseases.
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Affiliation(s)
- Zhiming Shu
- College of Life Science, Northwest A&F University, Shaanxi Yangling, 712100, China
| | - Wang He
- College of Life Science, Northwest A&F University, Shaanxi Yangling, 712100, China
| | - Mohamed Shahen
- College of Life Science, Northwest A&F University, Shaanxi Yangling, 712100, China; Zoology Department, Faculty of Science, Tanta University, 31527, Tanta, Egypt
| | - Zihu Guo
- College of Life Science, Northwest A&F University, Shaanxi Yangling, 712100, China
| | - Jia Shu
- College of Life Science, Northwest A&F University, Shaanxi Yangling, 712100, China
| | - Tiantian Wu
- College of Life Science, Northwest A&F University, Shaanxi Yangling, 712100, China
| | - Xiaoyu Bian
- College of Life Science, Northwest A&F University, Shaanxi Yangling, 712100, China
| | - Akhtar Hussain Shar
- College of Life Science, Northwest A&F University, Shaanxi Yangling, 712100, China
| | - Mayada Ragab Farag
- Forensic Medicine and Toxicology Department, Veterinary Medicine Faculty, Zagazig University, Zagazig, 44511, Egypt
| | - Mahmoud Alagawany
- Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt.
| | - Chaobin Liu
- College of Forestry, Northwest A&F University, Shaanxi Yangling, 712100, China.
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12
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Monocytes inhibit hepatitis C virus-induced TRAIL expression on CD56 bright NK cells. J Hepatol 2017; 67:1148-1156. [PMID: 28803951 DOI: 10.1016/j.jhep.2017.07.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 06/22/2017] [Accepted: 07/15/2017] [Indexed: 12/21/2022]
Abstract
BACKGROUND & AIMS Natural killer (NK) cells play an important role in the pathogenesis of hepatitis C virus (HCV) infection. We have previously shown that culture-derived HCV (HCVcc) enhance tumor necrosis-factor-related apoptosis-inducing ligand (TRAIL) expression on healthy NK cells, but not on those from patients infected with HCV, which was likely dependent on accessory cells. Here we sought to elucidate the mechanisms involved in altered TRAIL upregulation in this setting. METHODS Peripheral blood mononuclear cells (PBMC) from controls and patients infected with HCV were exposed to HCVcc. Cell depletions were performed to identify cells responsible for NK cell activation. Flow cytometry and ELISA were used to identify the cytokines involved in the NK activation process. RESULTS In patients infected with HCV, soluble factors secreted by control PBMC restored the ability of NK cells to express TRAIL. Of note, CD14+ cell depletion had identical effects upon virus exposure and promoted increased degranulation. Moreover, increased concentrations of interleukin (IL)-18 binding protein a (IL-18BPa) and IL-36 receptor antagonist (IL-36RA) were observed after PBMC exposure to HCVcc in patients with HCV. HCVcc-induced NK cell TRAIL expression was inhibited by IL-18BPa and IL-36RA in control subjects. There were statistically significant correlations between IL-18BPa and indices of liver inflammation and fibrosis, supporting a role for this protein in the pathogenesis of chronic HCV infection. CONCLUSIONS During chronic HCV infection, monocytes play a key role in negative regulation of NK cell activation, predominantly via secretion of inhibitors of IL-18 and IL-36. LAY SUMMARY Coordination and collaboration between immune cells are essential to fight pathogens. Herein we show that during HCV infection monocytes secrete IL-18 and IL-36 inhibitory proteins, reducing NK cell activation, and consequently inhibiting their ability to express TRAIL and kill target cells.
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Abstract
Hepatitis C virus (HCV) infects more than 170 million people worldwide and is the main cause of chronic hepatitis, liver cirrhosis and hepatocellular carcinoma. Although the newly developed direct-acting antivirals (DAAs) have transformed the treatment of HCV infection, controlling HCV infection on a global scale remains a challenge because of the high cost, low resistance barrier of DAAs and lack of HCV vaccine. The host immune responses associated with HCV infection, especially HCV-specific T cellular immunity, determine the outcome of HCV infection: either acute or chronic infection. It is important to fully interpret the immunopathogenesis of HCV infection and consequently to exploit effective strategies to eliminate HCV. Here, we review the current progress in HCV immunology, which will deepen our understanding of the spectrum of HCV infection and immunity in humans.
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Affiliation(s)
- Jijing Shi
- Department of Infectious Diseases, Beijing 302 Hospital, Beijing, 100039, China
| | - Yuanyuan Li
- Department of Infectious Diseases, Beijing 302 Hospital, Beijing, 100039, China
| | | | - Xuexiu Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 460000, China
| | - Fu-Sheng Wang
- Department of Infectious Diseases, Beijing 302 Hospital, Beijing, 100039, China.
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