1
|
He Q, Yu CF, Wu G, Wang KQ, Ni YB, Guo X, Fu ZH, Wang L, Tan DJ, Gao H, Wang C, Chen G, Chen XH, Chen B, Wang JZ. A novel alternative for pyrogen detection based on a transgenic cell line. Signal Transduct Target Ther 2024; 9:33. [PMID: 38369543 PMCID: PMC10874988 DOI: 10.1038/s41392-024-01744-0] [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: 06/07/2023] [Revised: 10/07/2023] [Accepted: 01/10/2024] [Indexed: 02/20/2024] Open
Abstract
Pyrogen, often as a contaminant, is a key indicator affecting the safety of almost all parenteral drugs (including biologicals, chemicals, traditional Chinese medicines and medical devices). It has become a goal to completely replace the in vivo rabbit pyrogen test by using the in vitro pyrogen test based on the promoted 'reduction, replacement and refinement' principle, which has been highly considered by regulatory agencies from different countries. We used NF-κB, a central signalling molecule mediating inflammatory responses, as a pyrogenic marker and the monocyte line THP-1 transfected with a luciferase reporter gene regulated by NF-κB as an in vitro model to detect pyrogens by measuring the intensity of a fluorescence signal. Here, we show that this test can quantitatively and sensitively detect endotoxin (lipopolysaccharide from different strains) and nonendotoxin (lipoteichoic acid, zymosan, peptidoglycan, lectin and glucan), has good stability in terms of NF-κB activity and cell phenotypes at 39 cell passages and can be applied to detect pyrogens in biologicals (group A & C meningococcal polysaccharide vaccine; basiliximab; rabies vaccine (Vero cells) for human use, freeze-dried; Japanese encephalitis vaccine (Vero cells), inactivated; insulin aspart injection; human albumin; recombinant human erythropoietin injection (CHO Cell)). The within-laboratory reproducibility of the test in three independent laboratories was 85%, 80% and 80% and the interlaboratory reproducibility among laboratories was 83.3%, 95.6% and 86.7%. The sensitivity (true positive rate) and specificity (true negative rate) of the test were 89.9% and 90.9%, respectively. In summary, the test provides a novel alternative for pyrogen detection.
Collapse
Affiliation(s)
- Qing He
- National Institutes for Food and Drug Control, Beijing, China
| | - Chuan-Fei Yu
- National Institutes for Food and Drug Control, Beijing, China
| | - Gang Wu
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - Kai-Qin Wang
- National Institutes for Food and Drug Control, Beijing, China
| | - Yong-Bo Ni
- National Institutes for Food and Drug Control, Beijing, China
| | - Xiao Guo
- National Institutes for Food and Drug Control, Beijing, China
| | - Zhi-Hao Fu
- National Institutes for Food and Drug Control, Beijing, China
| | - Lan Wang
- National Institutes for Food and Drug Control, Beijing, China
| | - De-Jiang Tan
- National Institutes for Food and Drug Control, Beijing, China
| | - Hua Gao
- National Institutes for Food and Drug Control, Beijing, China
| | - Can Wang
- Shanghai Institute for Food and Drug Control, Shanghai, China
| | - Gang Chen
- Shanghai Institute for Food and Drug Control, Shanghai, China
| | | | - Bo Chen
- KeyMed Biosciences Inc., Chengdu, China
| | - Jun-Zhi Wang
- National Institutes for Food and Drug Control, Beijing, China.
| |
Collapse
|
2
|
Mahapatra S, Ganguly B, Pani S, Saha A, Samanta M. A comprehensive review on the dynamic role of toll-like receptors (TLRs) in frontier aquaculture research and as a promising avenue for fish disease management. Int J Biol Macromol 2023; 253:126541. [PMID: 37648127 DOI: 10.1016/j.ijbiomac.2023.126541] [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: 07/05/2023] [Revised: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 09/01/2023]
Abstract
Toll-like receptors (TLRs) represent a conserved group of germline-encoded pattern recognition receptors (PRRs) that recognize pathogen-associated molecular patterns (PAMPs) and play a crucial role in inducing the broadly acting innate immune response against pathogens. In recent years, the detection of 21 different TLR types in various fish species has sparked interest in exploring the potential of TLRs as targets for boosting immunity and disease resistance in fish. This comprehensive review offers the latest insights into the diverse facets of fish TLRs, highlighting their history, classification, architectural insights through 3D modelling, ligands recognition, signalling pathways, crosstalk, and expression patterns at various developmental stages. It provides an exhaustive account of the distinct TLRs induced during the invasion of specific pathogens in various fish species and delves into the disparities between fish TLRs and their mammalian counterparts, highlighting the specific contribution of TLRs to the immune response in fish. Although various facets of TLRs in some fish, shellfish, and molluscs have been described, the role of TLRs in several other aquatic organisms still remained as potential gaps. Overall, this article outlines frontier aquaculture research in advancing the knowledge of fish immune systems for the proper management of piscine maladies.
Collapse
Affiliation(s)
- Smruti Mahapatra
- Immunology Laboratory, Fish Health Management Division, ICAR-Central Institute of Freshwater Aquaculture (ICAR-CIFA), Kausalyaganga, Bhubaneswar 751002, Odisha, India
| | - Bristy Ganguly
- Immunology Laboratory, Fish Health Management Division, ICAR-Central Institute of Freshwater Aquaculture (ICAR-CIFA), Kausalyaganga, Bhubaneswar 751002, Odisha, India
| | - Saswati Pani
- Immunology Laboratory, Fish Health Management Division, ICAR-Central Institute of Freshwater Aquaculture (ICAR-CIFA), Kausalyaganga, Bhubaneswar 751002, Odisha, India
| | - Ashis Saha
- Reproductive Biology and Endocrinology Laboratory, Fish Nutrition and Physiology Division, ICAR-Central Institute of Freshwater Aquaculture (ICAR-CIFA), Kausalyaganga, Bhubaneswar 751002, Odisha, India
| | - Mrinal Samanta
- Immunology Laboratory, Fish Health Management Division, ICAR-Central Institute of Freshwater Aquaculture (ICAR-CIFA), Kausalyaganga, Bhubaneswar 751002, Odisha, India.
| |
Collapse
|
3
|
Colleselli K, Stierschneider A, Wiesner C. An Update on Toll-like Receptor 2, Its Function and Dimerization in Pro- and Anti-Inflammatory Processes. Int J Mol Sci 2023; 24:12464. [PMID: 37569837 PMCID: PMC10419760 DOI: 10.3390/ijms241512464] [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: 07/09/2023] [Revised: 08/01/2023] [Accepted: 08/03/2023] [Indexed: 08/13/2023] Open
Abstract
While a certain level of inflammation is critical for humans to survive infection and injury, a prolonged inflammatory response can have fatal consequences. Pattern recognition Toll-like receptors (TLRs) are key players in the initiation of an inflammatory process. TLR2 is one of the most studied pattern recognition receptors (PRRs) and is known to form heterodimers with either TLR1, TLR4, TLR6, and TLR10, allowing it to recognize a wide range of pathogens. Although a large number of studies have been conducted over the past decades, there are still many unanswered questions regarding TLR2 mechanisms in health and disease. In this review, we provide an up-to-date overview of TLR2, including its homo- and heterodimers. Furthermore, we will discuss the pro- and anti-inflammatory properties of TLR2 and recent findings in prominent TLR2-associated infectious and neurodegenerative diseases.
Collapse
Affiliation(s)
| | | | - Christoph Wiesner
- Department of Medical and Pharmaceutical Biotechnology, IMC University of Applied Sciences, 3500 Krems, Austria
| |
Collapse
|
4
|
Molecular characterization of four innate immune genes in Tor putitora and their comparative transcriptional abundance during wild- and captive-bred ontogenetic developmental stages. FISH AND SHELLFISH IMMUNOLOGY REPORTS 2022; 3:100058. [DOI: 10.1016/j.fsirep.2022.100058] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/10/2022] [Accepted: 06/10/2022] [Indexed: 11/23/2022] Open
|
5
|
Bhat RAH, Tandel RS, Dash P, Nazir MI, Yousuf DJ, Bhat IA, Ganie PA, Gargotra P, Siva C. Computational analysis and functional characterisation of Tor putitora toll-like receptor 4 with the elucidation of its binding sites for microbial mimicking ligands. FISH & SHELLFISH IMMUNOLOGY 2022; 130:538-549. [PMID: 36152800 DOI: 10.1016/j.fsi.2022.09.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 09/12/2022] [Accepted: 09/18/2022] [Indexed: 06/16/2023]
Abstract
In the current study, full-length Toll-like receptor 4 (TLR4) cDNA was cloned and characterised in Tor putitora, an important fish inhibiting Himalayan rivers. The complete coding sequence of TpTLR4 is 2457 bp with nine key structural domains, including six leucine-rich repeats (LRRs). The phylogenetic tree revealed that TpTLR4 showed the closest relationship with TLR4 of Cyprinus carpio (96%), Labeo rohita (91%) and Megalobrama amblycephala (88%), all belonging to the Cyprinidae family. CELLO2GO tool revealed that TpTLR4 protein is highly localised in the plasma (67.7%), and the protein has a strong association with myeloid differentiation primary response 88 (MYD88) followed by Tumor necrosis factor receptor-associated factor (TRAF) family. In the toll-interleukin-1 receptor (TIR) domain of TpTLR4, the proline is replaced by the alanine amino acid, thus may give plasticity to the receptor to recognise both bacterial and viral ligands. Molecular docking has revealed that TpTLR4 showed the strongest affinity towards poly (I:C) with the binding energy of -6.1 kcal/mol and five hydrogen bonds among all ligands. Based on our molecular docking results, it can be presumed that TpTLR4 can sense bacterial, fungal and viral molecular patterns with binding sites mainly present in the TpTLR4 LRR9 motif, which spans between 515 and 602 amino acids. Tor putiora TLR4 transcript was ubiquitously expressed in all the tested fish tissues. Although, transcript level was found to be highest in blood and spleen followed by the kidney. The TpTLR4 transcripts showed peak expression in spleen and kidney at 12 h post-injection (hpi) (p < 0.05) of poly (I:C). The constitutive expression of TpTLR4 in various tissues, up-regulation in different tissues and strong binding affinities with poly (I:C) indicate that TpTLR4 may play an essential role in sensing pathogen-associated molecular patterns (PAMPs), particularly of viral origin.
Collapse
Affiliation(s)
| | | | - Pragyan Dash
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, Uttarakhand, India
| | - Mir Ishfaq Nazir
- DIVA, TNJFU-Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Muttukadu, 603112, Chennai, Tamil Nadu, India
| | - Dar Jaffer Yousuf
- Division of Irrigation and Drainage Engineering, ICAR-Central Soil Salinity Research Institute, Karnal, India
| | - Irfan Ahmad Bhat
- Institute of Life and Environmental Sciences, School of Engineering and Natural Sciences, Háskóli Íslands/University of Iceland Askja, Sturlugata 7, 101 Reykjavik, Iceland
| | - Parvaiz Ahmad Ganie
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, Uttarakhand, India
| | - Pankaj Gargotra
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, Uttarakhand, India
| | - C Siva
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, Uttarakhand, India
| |
Collapse
|
6
|
Reyes-Becerril M, Angulo M, Sanchez V, Machuca C, Méndez-Martínez Y, Angulo C. β-Glucan bioactivities from Cystobasidium benthicum in Totoaba macdonaldi thymus cells. FISH & SHELLFISH IMMUNOLOGY 2021; 119:542-553. [PMID: 34737133 DOI: 10.1016/j.fsi.2021.10.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 06/13/2023]
Abstract
The overuse of antibiotics in aquaculture has led to serious concerns on microbial resistance and chemical residues. Novel sources of immunostimulants could help to solve this problem by stimulating the immune system to fight against pathogens. Therefore, this study aims to explore the immunostimulant potential of Cystobacidium benthicum-β-glucans (Cb-βG) using thymus cells from Totoaba (Totoaba macdonaldi), a recently farmed fish species in Mexico. The Cb-βG was characterized and tested for its own antioxidant capacity. Then, a Cb-βG safety experiment was carried out in thymus cells by evaluating the effects on immune parameters and immune-related genes. Cb-βG had a molecular weight of 2.32 kDa, comprised of β-1,3-1,6-glucan (53.4%), and showed strong antioxidant capacity compared to that of the positive antioxidant control. Cb-βG had no toxic effects of thymus cells and enhanced phagocytic, respiratory burst, myeloperoxidase and superoxide activities. Additionally, immune-related genes implicated in recognition and effector functions of yeast glucans were up-regulated (Toll like receptor 2, C-type lectin family 17 member A, colony-stimulating factor 1 receptor 2, macrophage mannose receptor 1, and Interleukin-1β). In conclusion, the glucan -characterized physically-chemically from the yeast C. benthicum (Cb-βG)- was safe, had strong antioxidant capacity to scavenge free radicals, and stimulated immune parameters and immune-related gene expressions on thymus cells from Totoaba macdonaldi.
Collapse
Affiliation(s)
- Martha Reyes-Becerril
- Immunology & Vaccinology Group. Centro de Investigaciones Biológicas Del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S. 23096, Mexico
| | - Miriam Angulo
- Immunology & Vaccinology Group. Centro de Investigaciones Biológicas Del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S. 23096, Mexico
| | - Veronica Sanchez
- Immunology & Vaccinology Group. Centro de Investigaciones Biológicas Del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S. 23096, Mexico
| | - Cristian Machuca
- Immunology & Vaccinology Group. Centro de Investigaciones Biológicas Del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S. 23096, Mexico
| | | | - Carlos Angulo
- Immunology & Vaccinology Group. Centro de Investigaciones Biológicas Del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S. 23096, Mexico.
| |
Collapse
|
7
|
Liao Z, Su J. Progresses on three pattern recognition receptor families (TLRs, RLRs and NLRs) in teleost. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 122:104131. [PMID: 34022258 DOI: 10.1016/j.dci.2021.104131] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 04/13/2021] [Accepted: 05/10/2021] [Indexed: 06/12/2023]
Abstract
Pattern recognition receptors (PRRs) are a class of immune sensors that play crucial roles in detecting and responding to the conserved patterns of microorganisms. To date, many PRRs, such as TLRs, RLRs and NLRs, as well as their downstream molecules have been identified and characterized in teleost, while their ligands and immunoregulatory mechanisms remain largely unknown. In the present review, we described and discussed the main members of TLR/RLR/NLR families, including their expression profiles, signaling transductions and functions in teleost. And some splicing isoforms from TLR/RLR/NLR families were also addressed, which play synergistic and/or antagonistic roles in response to pathogen infections in teleost. TLRs sense different pathogens by forming homodimer and/or heterodimer. Beyond, functions of TLRs can also be affected by migrating. And some endolysosomal TLRs undergo proteolytic cleavage and in a pH-dependent mechanism to attain a mature functional form that mediate ligand recognition and downstream signaling. Until now, more than 80 members in TLR/RLR/NLR families have been identified in teleost, while only TLR5, TLR9, TLR19, TLR21, TLR22, MDA5, LGP2, NOD1 and NOD2 have direct evidence of ligand recognition in teleost. Meanwhile, new ligands as well as signaling pathways do occur during evolution of teleost. This review summarizes progresses on the TLRs/RLRs/NLRs in teleost. We attempt to insight into the ligands recognition and signaling transmission of TLRs/RLRs/NLRs in teleost.
Collapse
Affiliation(s)
- Zhiwei Liao
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Jianguo Su
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
| |
Collapse
|
8
|
Devnarain N, Waddad AY, de la Torre BG, Albericio F, Govender T. Novel Biomimetic Human TLR2-Derived Peptides for Potential Targeting of Lipoteichoic Acid: An In Silico Assessment. Biomedicines 2021; 9:biomedicines9081063. [PMID: 34440267 PMCID: PMC8391229 DOI: 10.3390/biomedicines9081063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/16/2021] [Accepted: 08/18/2021] [Indexed: 01/20/2023] Open
Abstract
Antimicrobial resistance is one of the most significant threats to health and economy around the globe and has been compounded by the emergence of COVID-19, raising important consequences for antimicrobial resistance development. Contrary to conventional targeting approaches, the use of biomimetic application via nanoparticles for enhanced cellular targeting, cell penetration and localized antibiotic delivery has been highlighted as a superior approach to identify novel targeting ligands for combatting antimicrobial resistance. Gram-positive bacterial cell walls contain lipoteichoic acid (LTA), which binds specifically to Toll-like receptor 2 (TLR2) on human macrophages. This phenomenon has the potential to be exploited for the design of biomimetic peptides for antibacterial application. In this study, we have derived peptides from sequences present in human TLR2 that bind to LTA with high affinity. In silico approaches including molecular modelling, molecular docking, molecular dynamics, and thermodynamics have enabled the identification of these crucial binding amino acids, the design of four novel biomimetic TLR2-derived peptides and their LTA binding potential. The outcomes of this study have revealed that one of these novel peptides binds to LTA more strongly and stably than the other three peptides and has the potential to enhance LTA targeting and bacterial cell penetration.
Collapse
Affiliation(s)
- Nikita Devnarain
- Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa;
| | - Ayman Y. Waddad
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4001, South Africa;
- Correspondence: (A.Y.W.); (T.G.); Tel.: +27-31-260-7367 (A.Y.W.); +27-31-260-7357 (T.G.)
| | - Beatriz G. de la Torre
- KRISP, School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4001, South Africa;
| | - Fernando Albericio
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4001, South Africa;
| | - Thirumala Govender
- Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa;
- Correspondence: (A.Y.W.); (T.G.); Tel.: +27-31-260-7367 (A.Y.W.); +27-31-260-7357 (T.G.)
| |
Collapse
|
9
|
Sahoo BR. Structure of fish Toll-like receptors (TLR) and NOD-like receptors (NLR). Int J Biol Macromol 2020; 161:1602-1617. [PMID: 32755705 PMCID: PMC7396143 DOI: 10.1016/j.ijbiomac.2020.07.293] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/26/2020] [Accepted: 07/27/2020] [Indexed: 12/23/2022]
Abstract
Innate immunity driven by pattern recognition receptor (PRR) protects the host from invading pathogens. Aquatic animals like fish where the adaptive immunity is poorly developed majorly rely on their innate immunity modulated by PRRs like toll-like receptors (TLR) and NOD-like receptors (NLR). However, current development to improve the fish immunity via TLR/NLR signaling is affected by a poor understanding of its mechanistic and structural features. This review discusses the structure of fish TLRs/NLRs and its interaction with pathogen associated molecular patterns (PAMPs) and downstream signaling molecules. Over the past one decade, significant progress has been done in studying the structure of TLRs/NLRs in higher eukaryotes; however, structural studies on fish innate immune receptors are undermined. Several novel TLR genes are identified in fish that are absent in higher eukaryotes, but the function is still poorly understood. Unlike the fundamental progress achieved in developing antagonist/agonist to modulate human innate immunity, analogous studies in fish are nearly lacking due to structural inadequacy. This underlies the importance of exploring the structural and mechanistic details of fish TLRs/NLRs at an atomic and molecular level. This review outlined the mechanistic and structural basis of fish TLR and NLR activation.
Collapse
|
10
|
TLR3-Dependent Activation of TLR2 Endogenous Ligands via the MyD88 Signaling Pathway Augments the Innate Immune Response. Cells 2020; 9:cells9081910. [PMID: 32824595 PMCID: PMC7464415 DOI: 10.3390/cells9081910] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/12/2020] [Accepted: 08/12/2020] [Indexed: 12/26/2022] Open
Abstract
The role of the adaptor molecule MyD88 is thought to be independent of Toll-like receptor 3 (TLR3) signaling. In this report, we demonstrate a previously unknown role of MyD88 in TLR3 signaling in inducing endogenous ligands of TLR2 to elicit innate immune responses. Of the various TLR ligands examined, the TLR3-specific ligand polyinosinic:polycytidylic acid (poly I:C), significantly induced TNF production and the upregulation of other TLR transcripts, in particular, TLR2. Accordingly, TLR3 stimulation also led to a significant upregulation of endogenous TLR2 ligands mainly, HMGB1 and Hsp60. By contrast, the silencing of TLR3 significantly downregulated MyD88 and TLR2 gene expression and pro-inflammatory IL1β, TNF, and IL8 secretion. The silencing of MyD88 similarly led to the downregulation of TLR2, IL1β, TNF and IL8, thus suggesting MyD88 to somehow act downstream of TLR3. Corroborating in vitro data, Myd88−/− knockout mice downregulated TNF, CXCL1; and phospho-p65 and phospho-IRF3 nuclear localization, upon poly I:C treatment in a mouse model of skin infection. Taken together, we identified a previously unknown role for MyD88 in the TLR3 signaling pathway, underlying the importance of TLRs and adapter protein interplay in modulating endogenous TLR ligands culminating in pro-inflammatory cytokine regulation.
Collapse
|
11
|
Kumar M, Topno RK, Dikhit MR, Bhawana, Sahoo GC, Madhukar M, Pandey K, Das P. Molecular docking studies of chloroquine and its derivatives against P23 pro-zbd domain of chikungunya virus: Implication in designing of novel therapeutic strategies. J Cell Biochem 2019; 120:18298-18308. [PMID: 31310373 DOI: 10.1002/jcb.29139] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 02/25/2019] [Accepted: 02/28/2019] [Indexed: 01/26/2023]
Abstract
The arthropod-transmitted chikungunya virus has emerged as an epidemic menace that causes debilitating polyarthritis. With this life-threatening impact on humans, the possible treatment requires to cure the viral infectivity. But, devoid of any vaccine against the chikungunya virus (CHIKV), there is a need to develop a novel chemotherapeutic strategy to treat this noxious infection. CHIKV carries highly compact P23pro-zbd structure that possesses potential RNA-binding surface domains which extremely influences the use of RNA template during genome replication at the time of infection and pathogenesis. Therefore, computational approaches were used to explore the novel small molecule inhibitors targeting P23pro-zbd domain. The tertiary structure was modeled and optimized using in silico approaches. The results obtained from PROCHECK (93.1% residues in favored regions), ERRAT (87.480 overall model quality) and ProSA (Z-score: -11.72) revealed the reliability of the proposed model. Interestingly, a previously reported inhibitor, chloroquine possesses good binding affinities with the target domain. In-depth analysis revealed that chloroquine derivatives such as didesethyl chloroquine hydroxyacetamide, cletoquine, hydroxychloroquine exhibited a better binding affinity. Notably, MD simulation analysis exhibited that Thr1312, Ala1355, Ala1356, Asn1357, Asp1364, Val1366, Cys1367, Ala1401, Gly1403, Ser1443, Tyr1444, Gly1445, Asn1459, and Thr1463 residues are the key amino acid responsible for stable ligand-protein interaction. The results obtained from this study provide new insights and advances the understanding to develop a new approach to consider effective and novel drug against chikungunya. However, a detailed in vivo study is required to explore its drug likeliness against this life-threatening disease.
Collapse
Affiliation(s)
- Maneesh Kumar
- Department of Virology, ICMR-Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, India
| | - Roshan Kamal Topno
- Department of Epidemiology, ICMR-Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, India
| | - Manas Ranjan Dikhit
- Department of Bioinformatics, ICMR-Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, India
| | - Bhawana
- Department of Virology, ICMR-Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, India
| | - Ganesh Chandra Sahoo
- Department of Bioinformatics, ICMR-Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, India
| | - Major Madhukar
- Department of Clinical Medicine, ICMR-Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, India
| | - Krishna Pandey
- Department of Clinical Medicine, ICMR-Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, India
| | - Pradeep Das
- Department of Molecular Biology, ICMR-Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, India
| |
Collapse
|
12
|
Computational elucidation of novel antagonists and binding insights by structural and functional analyses of serine hydroxymethyltransferase and interaction with inhibitors. GENE REPORTS 2018. [DOI: 10.1016/j.genrep.2017.10.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
13
|
Zhang H, Hu G, Liu Q, Zhang S. Cloning and expression study of a Toll-like receptor 2 (tlr2) gene from turbot, Scophthalmus maximus. FISH & SHELLFISH IMMUNOLOGY 2016; 59:137-148. [PMID: 27713068 DOI: 10.1016/j.fsi.2016.10.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 09/29/2016] [Accepted: 10/02/2016] [Indexed: 06/06/2023]
Abstract
Toll-like receptor 2 (TLR2) in mammals is a member of the ancient Toll-like family of receptors that predominantly recognizes conserved components of Gram-positive bacteria. In the present study, a tlr2 gene and its 5'-flanking sequence were cloned from turbot, Scophthalmus maximus, its responsive expressions to various immunostimulants were subsequently studied in vivo. The turbot (sm)tlr2 gene spans over 9.0 kb with a structure of 12 exon-11 intron and encodes 816 amino acids. The deduced protein shows the highest sequence identity (76.1%) to Japanese flounder Tlr2 and possesses a signal peptide sequence, a leucine-rich repeat (LRR) domain composed of 19 LRR motifs, a transmembrane region and a Toll/interleukin-1 receptor (TIR) domain. Phylogenetic analysis grouped it with other neoteleostei Tlr2as. A number of transcription factor binding sites known to be important for the basal transcriptional activity of TLR3 and response of TLR2 to lipopolysaccharide (LPS) signalling in mammals were predicted in the 5'-flanking sequence of smtlr2. Quantitative real-time PCR (qPCR) analysis demonstrated the constitutive expression of smtlr2 mRNA in all twelve examined tissues with higher levels in the lymphomyeloid-rich tissues and liver. Further, smtlr2 expression was up-regulated following stimulation with LPS, peptidoglycan (PGN) or polyinosinic: polycytidylic acid [poly(I:C)] in the gills, head kidney, spleen and muscle. Finally, for all three immunostimulants, a two-wave induced smtlr2 expression was observed in the head kidney and spleen in a 7-day time course and the strongest inducibility in the head kidney. These findings suggest a possible role of Smtlr2 in the immune responses to the infections of a broad range of pathogens that include Gram-positive and Gram-negative bacteria and RNA virus.
Collapse
Affiliation(s)
- Haiyan Zhang
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Guobin Hu
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
| | - Qiuming Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Shicui Zhang
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China
| |
Collapse
|
14
|
B cell activating factor is induced by toll-like receptor and NOD-like receptor-ligands and plays critical role in IgM synthesis in Labeo rohita. Mol Immunol 2016; 78:9-26. [DOI: 10.1016/j.molimm.2016.08.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 08/15/2016] [Accepted: 08/17/2016] [Indexed: 11/19/2022]
|
15
|
Pijanowski L, Scheer M, Verburg-van Kemenade BML, Chadzinska M. Production of inflammatory mediators and extracellular traps by carp macrophages and neutrophils in response to lipopolysaccharide and/or interferon-γ2. FISH & SHELLFISH IMMUNOLOGY 2015; 42:473-82. [PMID: 25453727 DOI: 10.1016/j.fsi.2014.11.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 11/13/2014] [Accepted: 11/14/2014] [Indexed: 05/22/2023]
Abstract
Neutrophilic granulocytes and macrophages are crucial for the innate immune response against infections. They migrate into the focus of inflammation, where they efficiently bind, engulf and kill bacteria by proteolytic enzymes, antimicrobial peptides, reactive oxygen (ROS) and nitrogen (RNS) species. Moreover, activated neutrophils and macrophages can form extracellular traps (ETs). Fish neutrophils and macrophages are morphologically, histochemically, and functionally similar to their mammalian counterparts, but their significance for regulation of inflammatory responses and pathogen killing needs further elucidation. We compared the activity of head kidney monocytes/macrophages and neutrophilic granulocytes of common carp and established that upon lipopolysaccharide stimulation, not only neutrophils, but also carp monocytes/macrophages release extracellular DNA and are capable to form macrophage extracellular traps (METs). To clarify whether many specific LPS functions reported for piscine phagocytes might be due to impurities in the commonly used LPS preparations we studied expression of inflammatory mediators, release of DNA, ROS and RNS in cells stimulated with LPS or its highly purified form (pLPS). Also IFN-γ2 stimulation and its synergism with LPS/pLPS in stimulating expression of pro-inflammatory mediators was studied. Results substantiate that a classical stimulation of TLR4 by LPS may indeed be absent in carp as most of the classically reported LPS effects are abolished or diminished when pLPS is used. Interestingly, we also observed a potent IL-10 expression in neutrophilic granulocytes upon LPS stimulation, which, apart from their pro-inflammatory function, clearly indicates a role in restrictive control of the inflammatory reaction.
Collapse
Affiliation(s)
- L Pijanowski
- Department of Evolutionary Immunology, Jagiellonian University, Gronostajowa 9, PL30-387 Krakow, Poland
| | - M Scheer
- Cell Biology and Immunology Group, Dept of Animal Sciences, Wageningen University, P.O. Box 338, 6700 AH Wageningen, The Netherlands
| | - B M L Verburg-van Kemenade
- Cell Biology and Immunology Group, Dept of Animal Sciences, Wageningen University, P.O. Box 338, 6700 AH Wageningen, The Netherlands
| | - M Chadzinska
- Department of Evolutionary Immunology, Jagiellonian University, Gronostajowa 9, PL30-387 Krakow, Poland.
| |
Collapse
|
16
|
Understanding the distinguishable structural and functional features in zebrafish TLR3 and TLR22, and their binding modes with fish dsRNA viruses: an exploratory structural model analysis. Amino Acids 2014; 47:381-400. [DOI: 10.1007/s00726-014-1872-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 11/05/2014] [Indexed: 11/26/2022]
|
17
|
Sahoo BR, Maharana J, Bhoi GK, Lenka SK, Patra MC, Dikhit MR, Dubey PK, Pradhan SK, Behera BK. A conformational analysis of mouse Nalp3 domain structures by molecular dynamics simulations, and binding site analysis. MOLECULAR BIOSYSTEMS 2014; 10:1104-16. [PMID: 24595807 DOI: 10.1039/c3mb70600a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Scrutinizing various nucleotide-binding oligomerization domain (NOD)-like receptor (NLR) genes in higher eukaryotes is very important for understanding the intriguing mechanism of the host defense against pathogens. The nucleotide-binding domain (NACHT), leucine-rich repeat (LRR), and pyrin domains (PYD)-containing protein 3 (Nalp3), is an intracellular innate immune receptor and is associated with several immune system related disorders. Despite Nalp3's protective role during a pathogenic invasion, the molecular features and structural organization of this crucial protein is poorly understood. Using comparative modeling and molecular dynamics simulations, we have studied the structural architecture of Nalp3 domains, and characterized the dynamic and energetic parameters of adenosine triphosphate (ATP) binding in NACHT, and pathogen-derived ligands muramyl dipeptide (MDP) and imidazoquinoline with LRR domains. The results suggested that walker A, B and extended walker B motifs were the key ATP binding regions in NACHT that mediate self-oligomerization. The analysis of the binding sites of MDP and imidazoquinoline revealed LRR 7-9 to be the most energetically favored site for imidazoquinoline interaction. However, the binding free energy calculations using the Molecular Mechanics/Poisson-Boltzmann Surface Area (MM/PBSA) method indicated that MDP is incompatible for activating the Nalp3 molecule in its monomeric form, and suggest its complex interaction with NOD2 or other NLRs accounts for MDP recognition. The high binding affinity of ATP with NACHT was correlated to the experimental data for human NLRs. Our binding site prediction for imidazoquinoline in LRR warrants further investigation via in vivo models. This is the first study that provides ligand recognition in mouse Nalp3 and its spatial structural arrangements.
Collapse
Affiliation(s)
- Bikash R Sahoo
- Department of Bioinformatics, Centre for Post-Graduate Studies, Orissa University of Agriculture & Technology, Bhubaneswar-751003, Odisha, India.
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Sahoo BR, Dubey PK, Goyal S, Bhoi GK, Lenka SK, Maharana J, Pradhan SK, Kataria RS. Exploration of the binding modes of buffalo PGRP1 receptor complexed with meso-diaminopimelic acid and lysine-type peptidoglycans by molecular dynamics simulation and free energy calculation. Chem Biol Interact 2014; 220:255-68. [PMID: 25014416 DOI: 10.1016/j.cbi.2014.06.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Revised: 05/28/2014] [Accepted: 06/30/2014] [Indexed: 12/20/2022]
Abstract
The peptidoglycan recognition proteins (PGRPs) are the key components of innate-immunity, and are highly specific for the recognition of bacterial peptidoglycans (PGN). Among different mammalian PGRPs, the PGRP1 binds to murein PGN of Gram-positive bacteria (lysine-type) and also have bactericidal activity towards Gram-negative bacteria (diaminopimelic acid or Dap-type). Buffaloes are the major sources of milk and meat in Asian sub-continents and are highly exposed to bacterial infections. The PGRP activates the innate-immune signaling, but their studies has been confined to limited species due to lack of structural and functional information. So, to understand the structural constituents, 3D model of buffalo PGRP1 (bfPGRP1) was constructed and conformational and dynamics properties of bfPGRP1 was studied. The bfPGRP1 model highly resembled human and camel PGRP structure, and shared a highly flexible N-terminus and centrally placed L-shaped cleft. Docking simulation of muramyl-tripeptide, tetrapeptide, pentapeptide-Dap-(MTP-Dap, MTrP-Dap and MPP-Dap) and lysine-type (MTP-Lys, MTrP-Lys and MPP-Lys) in AutoDock 4.2 and ArgusLab 4.0.1 anticipated β1, α2, α4, β4, and loops connecting β1-α2, α2-β2, β3-β4 and α4-α5 as the key interacting domains. The bfPGRP1-ligand complex molecular dynamics simulation followed by free binding energy (BE) computation conceded BE values of -18.30, -35.53, -41.80, -25.03, -24.62 and -22.30 kJ mol(-1) for MTP-Dap, MTrP-Dap, MPP-Dap, MTP-Lys, MTrP-Lys and MPP-Lys, respectively. The groove-surface and key binding residues involved in PGN-Dap and Lys-type interaction intended by the molecular docking, and were also accompanied by significant BE values directed their importance in pharmacogenomics, and warrants further in vivo studies for drug targeting and immune signaling pathways exploration.
Collapse
Affiliation(s)
- Bikash Ranjan Sahoo
- Department of Bioinformatics, Orissa University of Agriculture and Technology, Bhubaneswar 751001, India; Laboratory of Molecular Biophysics, Institute for Protein Research, Osaka University, Osaka Prefecture 5650871, Japan.
| | - Praveen Kumar Dubey
- Immunology Frontier Research Centre, Osaka University, Osaka Prefecture 5650871, Japan.
| | - Shubham Goyal
- RIKEN Center for Life Science Technologies, Yokohama 2300045, Japan
| | - Gopal Krushna Bhoi
- Department of Bioinformatics, Orissa University of Agriculture and Technology, Bhubaneswar 751001, India
| | - Santosh Kumar Lenka
- Department of Bioinformatics, Orissa University of Agriculture and Technology, Bhubaneswar 751001, India
| | - Jitendra Maharana
- Department of Bioinformatics, Orissa University of Agriculture and Technology, Bhubaneswar 751001, India; Biotechnology Laboratory, Central Inland Fisheries Research Institute, Kolkata, West Bengal 700120, India
| | - Sukanta Kumar Pradhan
- Department of Bioinformatics, Orissa University of Agriculture and Technology, Bhubaneswar 751001, India
| | - Ranjit Singh Kataria
- Division of Animal Biotechnology, National Bureau of Animal Genetic Resources, Karnal 132001, Haryana, India
| |
Collapse
|
19
|
Mancini RJ, Stutts L, Ryu KA, Tom JK, Esser-Kahn AP. Directing the immune system with chemical compounds. ACS Chem Biol 2014; 9:1075-85. [PMID: 24690004 PMCID: PMC5674983 DOI: 10.1021/cb500079s] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Agonists of immune cell receptors direct innate and adaptive immunity. These agonists range in size and complexity from small molecules to large macromolecules. Here, agonists of a class of immune cell receptors known as the Toll-like receptors (TLRs) are highlighted focusing on the distinctive molecular moieties that pertain to receptor binding and activation. How the structure and combined chemical signals translate into a variety of immune responses remain major questions in the field. In this structure-focused review, we outline potential areas where the tools of chemical biology could help decipher the emerging molecular codes that direct immune stimulation.
Collapse
Affiliation(s)
- Rock J Mancini
- Department of Chemistry, Chemical Engineering and Materials Science, and Biomedical Engineering, University of California Irvine , 1102 Natural Sciences 2, Irvine, California 92697-2025, United States
| | | | | | | | | |
Collapse
|