1
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Javaid N, Ahmad B, Patra MC, Choi S. Decoy peptides that inhibit TNF signaling by disrupting the TNF homotrimeric oligomer. FEBS J 2024. [PMID: 39003565 DOI: 10.1111/febs.17220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/18/2024] [Accepted: 06/24/2024] [Indexed: 07/15/2024]
Abstract
Tumor necrosis factor (TNF) is a pro-inflammatory cytokine and its functional homotrimeric form interacts with the TNF receptor (TNFR) to activate downstream apoptotic, necroptotic, and inflammatory signaling pathways. Excessive activation of these pathways leads to various inflammatory diseases, which makes TNF a promising therapeutic target. Here, 12-mer peptides were selected from the interface of TNF-TNFR based upon their relative binding energies and were named 'TNF-inhibiting decoys' (TIDs). These decoy peptides inhibited TNF-mediated secretion of cytokines and cell death, as well as activation of downstream signaling effectors. Effective TIDs inhibited TNF signaling by disrupting the formation of TNF's functional homotrimeric form. Among derivatives of TIDs, TID3c showed slightly better efficacy in cell-based assays by disrupting TNF trimer formation. Moreover, TID3c oligomerized TNF to a high molecular weight configuration. In silico modeling and simulations revealed that TID3c and its parent peptide, TID3, form a stable complex with TNF through hydrogen bonds and electrostatic interactions, which makes them the promising lead to develop peptide-based anti-TNF therapeutics.
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Affiliation(s)
- Nasir Javaid
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
- S&K Therapeutics, Suwon, Korea
| | - Bilal Ahmad
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
- S&K Therapeutics, Suwon, Korea
| | | | - Sangdun Choi
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
- S&K Therapeutics, Suwon, Korea
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2
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Jahandar-Lashaki S, Farajnia S, Faraji-Barhagh A, Hosseini Z, Bakhtiyari N, Rahbarnia L. Phage Display as a Medium for Target Therapy Based Drug Discovery, Review and Update. Mol Biotechnol 2024:10.1007/s12033-024-01195-6. [PMID: 38822912 DOI: 10.1007/s12033-024-01195-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 05/07/2024] [Indexed: 06/03/2024]
Abstract
Phage libraries are now amongst the most prominent approaches for the identification of high-affinity antibodies/peptides from billions of displayed phages in a specific library through the biopanning process. Due to its ability to discover potential therapeutic candidates that bind specifically to targets, phage display has gained considerable attention in targeted therapy. Using this approach, peptides with high-affinity and specificity can be identified for potential therapeutic or diagnostic use. Furthermore, phage libraries can be used to rapidly screen and identify novel antibodies to develop immunotherapeutics. The Food and Drug Administration (FDA) has approved several phage display-derived peptides and antibodies for the treatment of different diseases. In the current review, we provided a comprehensive insight into the role of phage display-derived peptides and antibodies in the treatment of different diseases including cancers, infectious diseases and neurological disorders. We also explored the applications of phage display in targeted drug delivery, gene therapy, and CAR T-cell.
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Affiliation(s)
- Samaneh Jahandar-Lashaki
- Medical Biotechnology Department, Faculty of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Safar Farajnia
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Aref Faraji-Barhagh
- Medical Biotechnology Department, Faculty of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zahra Hosseini
- Department of Microbiology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - Nasim Bakhtiyari
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Leila Rahbarnia
- Infectious and Tropical Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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3
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Javaid N, Patra MC, Cho DE, Batool M, Kim Y, Choi GM, Kim MS, Hahm DH, Choi S. An orally active, small-molecule TNF inhibitor that disrupts the homotrimerization interface improves inflammatory arthritis in mice. Sci Signal 2022; 15:eabi8713. [DOI: 10.1126/scisignal.abi8713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Excessive signaling by the proinflammatory cytokine TNF is involved in several autoimmune diseases, including rheumatoid arthritis (RA). However, unlike the approved biologics currently used to treat this and other conditions, commercially available small-molecule inhibitors of TNF trimerization are cytotoxic or exhibit low potency. Here, we report a TNF-inhibitory molecule (TIM) that reduced TNF signaling in vitro and was an effective treatment in a mouse model of RA. The initial lead compound, TIM1, attenuated TNF-induced apoptosis of human and mouse cells by delaying the induction of proinflammatory NF-κB and MAPK signaling and caspase 3– and caspase 8–dependent apoptosis. TIM1 inhibited the secretion of the proinflammatory cytokines IL-6 and IL-8 by disrupting TNF homotrimerization, thereby preventing its association with the TNF receptor. In a mouse model of collagen-induced polyarthritis, the more potent TIM1 analog TIM1c was orally bioavailable and reduced paw swelling, histological indicators of knee joint pathology, inflammatory infiltration of the joint, and the overall arthritis index. Orally delivered TIM1c showed immunological effects similar to those elicited by intraperitoneal injection of the FDA-approved TNF receptor decoy etanercept. Thus, TIM1c is a promising lead compound for the development of small-molecule therapies for the treatment of RA and other TNF-dependent systemic inflammation disorders.
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Affiliation(s)
- Nasir Javaid
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea
| | - Mahesh Chandra Patra
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea
| | - Da-Eun Cho
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Maria Batool
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea
- S&K Therapeutics, Ajou University Campus Plaza 418, 199 Worldcup-ro, Yeongtong-gu, Suwon 16502, Korea
| | - Yoongeun Kim
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Gwang Muk Choi
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Moon Suk Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea
| | - Dae-Hyun Hahm
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Sangdun Choi
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea
- S&K Therapeutics, Ajou University Campus Plaza 418, 199 Worldcup-ro, Yeongtong-gu, Suwon 16502, Korea
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4
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Mohammadi M, Soltanzadeh M, Ebrahimi AR, Hamishehkar H. Spirulina platensis protein hydrolysates: Techno-functional, nutritional and antioxidant properties. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102739] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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5
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Marković I, Wolfrum T, Wohlmann A, Gautam K, Friedrich K. Functional characterisation of two receptor interaction determinants in human thymic stromal lymphopoietin. Biol Chem 2021; 403:243-249. [PMID: 34699696 DOI: 10.1515/hsz-2021-0293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 10/14/2021] [Indexed: 11/15/2022]
Abstract
Thymic stromal lymphopoietin (TSLP) is a pro-inflammatory cytokine with important pathological roles in Asthma bronchiale, malignant tumours and other diseases. The heterodimeric human TSLP receptor (hTSLPR) consists of the TSLP-binding subunit (TSLPRα) and the IL-7Rα-subunit. We studied the properties of hTSLP variants with mutations in their bipartite interaction interface towards IL-7Rα. One mutant (T46D/K101D) showed only mild impairment in receptor affinity but a massive reduction in biological activity. To facilitate the future development of hTSLP mutants with drug properties, we have devised a eukaryontic cytokine display assay with activity read-out and intrinsic genotype-phenotype coupling.
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Affiliation(s)
- Iva Marković
- Institute of Biochemistry II, University Hospital Jena, Nonnenplan 2-4, D-07743Jena, Germany
| | - Therese Wolfrum
- Institute of Biochemistry II, University Hospital Jena, Nonnenplan 2-4, D-07743Jena, Germany
| | - Andreas Wohlmann
- Institute of Biochemistry II, University Hospital Jena, Nonnenplan 2-4, D-07743Jena, Germany
| | - Kritan Gautam
- Institute of Biochemistry II, University Hospital Jena, Nonnenplan 2-4, D-07743Jena, Germany
| | - Karlheinz Friedrich
- Institute of Biochemistry II, University Hospital Jena, Nonnenplan 2-4, D-07743Jena, Germany
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Alizadeh AA, Morris MB, Church WB, Yaqoubi S, Dastmalchi S. A mechanistic perspective, clinical applications, and phage-display-assisted discovery of TNFα inhibitors. Drug Discov Today 2021; 27:503-518. [PMID: 34628042 DOI: 10.1016/j.drudis.2021.09.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 06/20/2021] [Accepted: 09/30/2021] [Indexed: 11/03/2022]
Abstract
TNFα participates in a variety of physiological processes, but at supra-physiological concentrations it has been implicated in the pathology of inflammatory and autoimmune diseases. Therefore, much attention has been devoted to the development of strategies that overcome the effects of aberrant TNFα concentration. Promising strategies include drugs that destabilize the active (trimeric) form of TNFα and antagonists of TNFα receptor type I. Underpinning these strategies is the successful application of phage-display technology to identify anti-TNFα peptides and antibodies. Here, we review the development of inhibitors of the TNFα-TNF receptor system, with particular focus on the phage-display-assisted identification of molecules that interfere with this system by acting as inhibitors of TNFα or by sequestering TNFα away from its receptor.
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Affiliation(s)
- Ali Akbar Alizadeh
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Michael B Morris
- Discipline of Physiology and Bosch Institute, School of Medical Sciences, University of Sydney, NSW 2006, Australia
| | - W Bret Church
- Group in Biomolecular Structure and Informatics, Faculty of Pharmacy A15, University of Sydney, Sydney, NSW 2006, Australia
| | - Shadi Yaqoubi
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran; Pharmaceutical Analysis Research Center, Tabriz University Medical Sciences, Tabriz, Iran
| | - Siavoush Dastmalchi
- Department of Medicinal Chemistry, School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran; Faculty of Pharmacy, Near East University, PO Box 99138, Nicosia, North Cyprus, Mersin 10, Turkey.
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Mascret A, Mouhsine H, Attia G, Cabrera D, Benchekroun M, Gizzi P, Zerrouki C, Fourati N, Zagury JF, Veitía MSI, Port M. New contributions to the drug profile of TNFα inhibitor SPD304: Affinity, selectivity and ADMET considerations. Eur J Pharmacol 2021; 907:174285. [PMID: 34181962 DOI: 10.1016/j.ejphar.2021.174285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 06/11/2021] [Accepted: 06/22/2021] [Indexed: 11/24/2022]
Abstract
Tumor necrosis factor alpha (TNFα) is a relevant clinical target for the treatment of chronic inflammatory diseases. Currently, only few small molecules are known as direct inhibitors of TNFα. To date, none of these molecules has shown both an efficient activity and a low toxicity to be considered for clinical trials. The SPD304 is considered as a reference of direct inhibitors of TNFα because of its well demonstrated mechanism (He et al., 2005). Herein, we provide new insights regarding the drug profile, selectivity and absorption, distribution, metabolism, excretion and toxicity (ADMET) considerations of SPD304 to evaluate its potential as a hit for the structure-based design of novel TNFα inhibitors. ELISA experiments confirmed the inhibition of TNFα/TNF receptor 1 binding (IC50 = 12 μM). Cellular-based assays highlighted the cytotoxicity of SPD304, as well as its ability to inhibit TNFα signaling pathways at non-cytotoxic concentrations. A surface acoustic wave (SAW) experiment highlighted only one binding site with a dissociation constant of 6.1 ± 4.7 nM. SPD304 inhibited the binding of the cytokines like interleukins (IL)-4 and IL-13 to their receptors and showed no direct inhibition on proteins involved in the TNFα pathway. Finally, the thermodynamic solubility and Caco-2 cells permeability of SPD304 were experimentally evaluated and ADMET in silico predictions are also discussed. The physicochemical, pharmacological and ADMET studies of SPD304 have shown that is not an ideal hit for a drug optimization program based on its chemical structure.
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Affiliation(s)
- Aïda Mascret
- Laboratoire Génomique, Bioinformatique et Chimie Moléculaire (EA 7528), Conservatoire National des Arts et Métiers (Cnam), 2 rue Conté, 75003, HESAM Université, Paris, France; Peptinov, Pépinière Paris Santé Cochin, Hôpital Cochin, 29 rue du Faubourg, Saint Jacques, Paris, 75014, France
| | - Hadley Mouhsine
- Peptinov, Pépinière Paris Santé Cochin, Hôpital Cochin, 29 rue du Faubourg, Saint Jacques, Paris, 75014, France
| | - Ghada Attia
- Laboratoire SATIE, UMR CNRS 8029, Conservatoire National des Arts et Métiers (Cnam), 292 rue Saint Martin, 75003, HESAM Université, Paris, France
| | - Damien Cabrera
- Laboratoire Génomique, Bioinformatique et Chimie Moléculaire (EA 7528), Conservatoire National des Arts et Métiers (Cnam), 2 rue Conté, 75003, HESAM Université, Paris, France
| | - Mohamed Benchekroun
- Laboratoire Génomique, Bioinformatique et Chimie Moléculaire (EA 7528), Conservatoire National des Arts et Métiers (Cnam), 2 rue Conté, 75003, HESAM Université, Paris, France
| | - Patrick Gizzi
- PCBIS, UMS3286 CNRS - Université de Strasbourg, Boulevard Sébastien Brant, 67401, Illkirch Cedex, France
| | - Chouki Zerrouki
- Laboratoire SATIE, UMR CNRS 8029, Conservatoire National des Arts et Métiers (Cnam), 292 rue Saint Martin, 75003, HESAM Université, Paris, France
| | - Najla Fourati
- Laboratoire SATIE, UMR CNRS 8029, Conservatoire National des Arts et Métiers (Cnam), 292 rue Saint Martin, 75003, HESAM Université, Paris, France
| | - Jean-François Zagury
- Laboratoire Génomique, Bioinformatique et Chimie Moléculaire (EA 7528), Conservatoire National des Arts et Métiers (Cnam), 2 rue Conté, 75003, HESAM Université, Paris, France
| | - Maité Sylla-Iyarreta Veitía
- Laboratoire Génomique, Bioinformatique et Chimie Moléculaire (EA 7528), Conservatoire National des Arts et Métiers (Cnam), 2 rue Conté, 75003, HESAM Université, Paris, France.
| | - Marc Port
- Laboratoire Génomique, Bioinformatique et Chimie Moléculaire (EA 7528), Conservatoire National des Arts et Métiers (Cnam), 2 rue Conté, 75003, HESAM Université, Paris, France.
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8
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In vitro display evolution of the PURE system-expressed TNFα-binding unnatural cyclic peptide containing an N-methyl-d-amino acid. Biochem Biophys Res Commun 2020; 534:519-525. [PMID: 33276950 DOI: 10.1016/j.bbrc.2020.11.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 11/13/2020] [Indexed: 12/30/2022]
Abstract
Tumor necrosis factor-alpha (TNFα) is a multifunctional cytokine associated with inflammation, immune responses, and autoimmune diseases including rheumatoid arthritis, inflammatory bowel disease, and psoriasis. In the present study, we performed in vitro selection, systematic evolution of ligands by exponential enrichment (SELEX) against human TNFα from mRNA-displayed peptide library prepared with Escherichia coli-reconstituted cell-free transcription/translation system (PURE system) and cyclized by N-chloroacetyl-N-methyl-d-phenylalanine incorporated by genetic code expansion (sense suppression). We identified a novel TNFα-binding thioether-cyclized peptide that contains an N-methyl-d-phenylalanine. Since cyclic structure and presence of an N-methyl-d-amino acid can increase proteolytic stability, the TNFα binding peptide has potential to be used for therapeutic, research and diagnostic applications.
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9
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Alizadeha AA, Hamzeh-Mivehroud M, Haddad E, Haddad N, Sharifi M, Mohammadi S, Pourtaghi-Anvarian S, Dastmalchi S. Characterization of Novel Fragment Antibodies Against TNF-alpha Isolated Using Phage Display Technique. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2019; 18:759-771. [PMID: 31531059 PMCID: PMC6706722 DOI: 10.22037/ijpr.2019.1100646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Tumor necrosis factor alpha (TNF-α) is an inflammatory cytokine which plays crucial roles in pathogenesis of inflammatory diseases. The current study aimed to investigate the binding abilities of I44 and I49 domain antibodies to TNF-α. The dAbs were expressed in bacterial expression system and purified by affinity chromatography using Ni-sepharose column. The expression and purity of the proteins were evaluated using western blotting and SDS-PAGE techniques, respectively. ELISA experiment showed that I44 and I49 dAbs bind to TNF-α with the binding constants (Kd) of 5.18 ± 1.41 and 2.42 ± 0.55 µM, respectively. The inhibitory effect of dAbs on TNF-α biological effect was determined in MTT assay in which I44 and I49 prevented TNF-α cell cytotoxicity with IC50 values of 6.61 and 3.64 µM, respectively. The identified anti-TNF-α dAbs could bind to and inhibit TNF-α activity. The dAbs activities can be attributed to their ability to establish hydrogen bonds as well as hydrophobic contacts with TNF-α. The results of the current study can pave the way for further structural studies in order to introduce new more potent anti-TNF-α antibodies.
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Affiliation(s)
- Ali Akbar Alizadeha
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,A. A. A. and M. H. M. contributed equally to this work
| | - Maryam Hamzeh-Mivehroud
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,A. A. A. and M. H. M. contributed equally to this work
| | - Elnaz Haddad
- School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nazanin Haddad
- School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehdi Sharifi
- School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Samin Mohammadi
- School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Siavoush Dastmalchi
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Faculty of Pharmacy, Near East University, POBOX: 99138, Nicosia, North Cyprus, Mersin 10, Turkey
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10
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Pourtaghi-Anvarian S, Mohammadi S, Hamzeh-Mivehroud M, Alizadeh AA, Dastmalchi S. Characterization of the novel anti-TNF-α single-chain fragment antibodies using experimental and computational approaches. Prep Biochem Biotechnol 2019; 49:38-47. [DOI: 10.1080/10826068.2018.1487855] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Samira Pourtaghi-Anvarian
- School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Samin Mohammadi
- School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Hamzeh-Mivehroud
- School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ali Akbar Alizadeh
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Siavoush Dastmalchi
- School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Faculty of Pharmacy, Near East University, North Cyprus, Turkey
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11
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Qiao M, Tu M, Chen H, Mao F, Yu C, Du M. Identification and In Silico Prediction of Anticoagulant Peptides from the Enzymatic Hydrolysates of Mytilus edulis Proteins. Int J Mol Sci 2018; 19:ijms19072100. [PMID: 30029529 PMCID: PMC6073223 DOI: 10.3390/ijms19072100] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 07/02/2018] [Accepted: 07/12/2018] [Indexed: 01/13/2023] Open
Abstract
Mytilus edulis is a typical marine bivalve mollusk. Many kinds of bioactive components with nutritional and pharmaceutical activities in Mytilus edulis were reported. In this study, eight different parts of Mytilus edulis tissues, i.e., the foot, byssus, pedal retractor muscle, mantle, gill, adductor muscle, viscera, and other parts, were separated and the proteins from these tissues were prepared. A total of 277 unique peptides from the hydrolysates of different proteins were identified by UPLC-Q-TOF-MS/MS, and the molecular weight distribution of the peptides in different tissues was investigated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The bioactivity of the peptides was predicted through the Peptide Ranker database and molecular docking. Moreover, the peptides from the adductor muscle were chosen to do the active validation of anticoagulant activity. The active mechanism of three peptides from the adductor muscle, VQQELEDAEERADSAEGSLQK, RMEADIAAMQSDLDDALNGQR, and AAFLLGVNSNDLLK, were analyzed by Discovery Studio 2017, which also explained the anticoagulant activity of the hydrolysates of proteins from adductor muscle. This study optimized a screening and identification method of bioactive peptides from enzymatic hydrolysates of different tissues in Mytilus edulis.
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Affiliation(s)
- Meiling Qiao
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
| | - Maolin Tu
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Hui Chen
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
| | - Fengjiao Mao
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
| | - Cuiping Yu
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
| | - Ming Du
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
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TLR4/MD2 specific peptides stalled in vivo LPS-induced immune exacerbation. Biomaterials 2017; 126:49-60. [PMID: 28254693 DOI: 10.1016/j.biomaterials.2017.02.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 02/15/2017] [Accepted: 02/17/2017] [Indexed: 12/22/2022]
Abstract
Negative regulation of Toll-like receptor-4 (TLR4) is anticipated to control the pathogen-induced exaggerated immune response. However, effective TLR4 antagonists with scarce off-target effects are yet to be developed. To fill this void, we sought to design small peptide-inhibitors of the TLR4/MD2-LPS interaction. Here we report novel TLR4-antagonistic peptides (TAP), identified through phage display, endowed with the LPS-induced proinflammation inhibition, and confirmed in mice. TAPs-attributed TLR4-antagonism were initially evaluated through NF-κB inhibition in HEK-blue hTLR4 and RAW264.7 cells, and further reinforced by the downregulation of MAPKs (mitogen-activated protein kinases), NF-κB, interleukin 6, and suppression of the oxidative-stress products and iNOS in macrophages and human peripheral blood mononuclear cells (hPBMCs). Among these, TAP2 specifically halted the TLR4, but not other TLRs signaling, which was further confirmed by the biophysical kinetic assay. Finally, TAP2 diminished LPS-elicited systemic cytokine response in vivo, suggesting that TAPs, specifically TAP2, have the potential to treat TLR4-mediated immune ailments.
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