1
|
Nascimento LAD, Ferreira GM, Ferreira EI. Exploring the conformational dynamics of the CRD4: a model for receptor lysosomal activity shifts in search of 'sweet' and 'sour' states. J Biomol Struct Dyn 2024; 42:6448-6454. [PMID: 37440242 DOI: 10.1080/07391102.2023.2235603] [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: 05/24/2023] [Accepted: 07/06/2023] [Indexed: 07/14/2023]
Abstract
The macrophage mannose receptor (RMM) is a crucial component of the immune system involved in immune responses, inflammation resolution, and tissue remodeling. When RMM is activated by a specific ligand, it undergoes internalization, forming an endosome that matures into a lysosome. Within the lysosome, structural changes in RMM facilitate the dissociation of ligands for further processing. However, the precise details of these structural changes are not well understood. In this study, we used molecular dynamics simulations to investigate the conformational dynamics of a specific region called CRD4 in RMM. Our simulations explored different conditions, including pH variations and the presence of Ca2+ ions. By analyzing the simulation data, we found that conformational changes primarily occur in loop regions, while the secondary structure remains stable. The binding site of CRD4, essential for ligand interaction, is located on the protein surface between two specific loop regions. Ligand binding is stabilized by three important amino acids. Interestingly, the interaction patterns differ between monosaccharide and disaccharide ligands. These findings improve our understanding of CRD4's dynamics and how it recognizes ligands. They provide insights into the structure of CRD4 and its role in ligand dissociation within lysosomes. The study also highlights the significance of loop regions in functional dynamics and interactions. Further research is needed to fully uncover the complete structure of CRD4, understand ligand binding modes, and explore the influence of environmental factors. This study lays the foundation for future investigations targeting carbohydrate-protein interactions and the development of therapeutics based on RMM's unique properties.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
| | - Glaucio Monteiro Ferreira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, São Paulo, Brazil
| | - Elizabeth Igne Ferreira
- Department of Pharmacy, School of Pharmaceutical Sciences, University of Sao Paulo, São Paulo, Brazil
| |
Collapse
|
2
|
Lefèbre J, Falk T, Ning Y, Rademacher C. Secondary Sites of the C-type Lectin-Like Fold. Chemistry 2024; 30:e202400660. [PMID: 38527187 DOI: 10.1002/chem.202400660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 03/27/2024]
Abstract
C-type lectins are a large superfamily of proteins involved in a multitude of biological processes. In particular, their involvement in immunity and homeostasis has rendered them attractive targets for diverse therapeutic interventions. They share a characteristic C-type lectin-like domain whose adaptability enables them to bind a broad spectrum of ligands beyond the originally defined canonical Ca2+-dependent carbohydrate binding. Together with variable domain architecture and high-level conformational plasticity, this enables C-type lectins to meet diverse functional demands. Secondary sites provide another layer of regulation and are often intricately linked to functional diversity. Located remote from the canonical primary binding site, secondary sites can accommodate ligands with other physicochemical properties and alter protein dynamics, thus enhancing selectivity and enabling fine-tuning of the biological response. In this review, we outline the structural determinants allowing C-type lectins to perform a large variety of tasks and to accommodate the ligands associated with it. Using the six well-characterized Ca2+-dependent and Ca2+-independent C-type lectin receptors DC-SIGN, langerin, MGL, dectin-1, CLEC-2 and NKG2D as examples, we focus on the characteristics of non-canonical interactions and secondary sites and their potential use in drug discovery endeavors.
Collapse
Affiliation(s)
- Jonathan Lefèbre
- Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Pharmaceutical, Nutritional and Sport, Sciences, University of Vienna, Vienna, Austria
- Department of Microbiology, Immunology and Genetics, University of Vienna, Max F. Perutz Labs, Vienna, Austria
| | - Torben Falk
- Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Pharmaceutical, Nutritional and Sport, Sciences, University of Vienna, Vienna, Austria
- Department of Microbiology, Immunology and Genetics, University of Vienna, Max F. Perutz Labs, Vienna, Austria
| | - Yunzhan Ning
- Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Pharmaceutical, Nutritional and Sport, Sciences, University of Vienna, Vienna, Austria
- Department of Microbiology, Immunology and Genetics, University of Vienna, Max F. Perutz Labs, Vienna, Austria
| | - Christoph Rademacher
- Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
- Department of Microbiology, Immunology and Genetics, University of Vienna, Max F. Perutz Labs, Vienna, Austria
| |
Collapse
|
3
|
Kong D, Qian Y, Yu B, Hu Z, Cheng C, Wang Y, Fang Z, Yu J, Xiang S, Cao L, He Y. Interaction of human dendritic cell receptor DEC205/CD205 with keratins. J Biol Chem 2024; 300:105699. [PMID: 38301891 PMCID: PMC10914487 DOI: 10.1016/j.jbc.2024.105699] [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: 09/19/2023] [Revised: 01/18/2024] [Accepted: 01/21/2024] [Indexed: 02/03/2024] Open
Abstract
DEC205 (CD205) is one of the major endocytic receptors on dendritic cells and has been widely used as a receptor target in immune therapies. It has been shown that DEC205 can recognize dead cells through keratins in a pH-dependent manner. However, the mechanism underlying the interaction between DEC205 and keratins remains unclear. Here we determine the crystal structures of an N-terminal fragment of human DEC205 (CysR∼CTLD3). The structural data show that DEC205 shares similar overall features with the other mannose receptor family members such as the mannose receptor and Endo180, but the individual domains of DEC205 in the crystal structure exhibit distinct structural features that may lead to specific ligand binding properties of the molecule. Among them, CTLD3 of DEC205 adopts a unique fold of CTLD, which may correlate with the binding of keratins. Furthermore, we examine the interaction of DEC205 with keratins by mutagenesis and biochemical assays based on the structural information and identify an XGGGX motif on keratins that can be recognized by DEC205, thereby providing insights into the interaction between DEC205 and keratins. Overall, these findings not only improve the understanding of the diverse ligand specificities of the mannose receptor family members at the molecular level but may also give clues for the interactions of keratins with their binding partners in the corresponding pathways.
Collapse
Affiliation(s)
- Dandan Kong
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuanying Qian
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bowen Yu
- Department of Immunology, School of Basic Medical Sciences, Weifang Medical University, Weifang, China
| | - Zhenzheng Hu
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chen Cheng
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuanyuan Wang
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhen Fang
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jun Yu
- Department of Biochemistry and Molecular Biology, Key Laboratory of Immune Microenvironment and Disease, Tianjin Medical University, Tianjin, China
| | - Song Xiang
- Department of Biochemistry and Molecular Biology, Key Laboratory of Immune Microenvironment and Disease, Tianjin Medical University, Tianjin, China
| | - Longxing Cao
- School of Life Science, Westlake University, Hangzhou, Zhejiang, China
| | - Yongning He
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Cancer Systems Regulation and Clinical Translation, Shanghai, China; Department of Biliary-Pancreatic Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| |
Collapse
|
4
|
Paurević M, Šrajer Gajdošik M, Ribić R. Mannose Ligands for Mannose Receptor Targeting. Int J Mol Sci 2024; 25:1370. [PMID: 38338648 PMCID: PMC10855088 DOI: 10.3390/ijms25031370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/15/2024] [Accepted: 01/19/2024] [Indexed: 02/12/2024] Open
Abstract
The mannose receptor (MR, CD 206) is an endocytic receptor primarily expressed by macrophages and dendritic cells, which plays a critical role in both endocytosis and antigen processing and presentation. MR carbohydrate recognition domains (CRDs) exhibit a high binding affinity for branched and linear oligosaccharides. Furthermore, multivalent mannose presentation on the various templates like peptides, proteins, polymers, micelles, and dendrimers was proven to be a valuable approach for the selective and efficient delivery of various therapeutically active agents to MR. This review provides a detailed account of the most relevant and recent aspects of the synthesis and application of mannosylated bioactive formulations for MR-mediated delivery in treatments of cancer and other infectious diseases. It further highlights recent findings related to the necessary structural features of the mannose-containing ligands for successful binding to the MR.
Collapse
Affiliation(s)
- Marija Paurević
- Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, HR-31000 Osijek, Croatia; (M.P.); (M.Š.G.)
| | - Martina Šrajer Gajdošik
- Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, HR-31000 Osijek, Croatia; (M.P.); (M.Š.G.)
| | - Rosana Ribić
- Department of Nursing, University Center Varaždin, University North, Jurja Križanića 31b, HR-42000 Varaždin, Croatia
| |
Collapse
|
5
|
Cummings RD. The mannose receptor ligands and the macrophage glycome. Curr Opin Struct Biol 2022; 75:102394. [PMID: 35617912 DOI: 10.1016/j.sbi.2022.102394] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/12/2022] [Accepted: 04/16/2022] [Indexed: 11/03/2022]
Abstract
A unique glycan-binding protein expressed in macrophages and some types of other immune cells is the mannose receptor (MR, CD206). It is an endocytic, transmembrane protein with multiple glycan-binding domains and different specificities in binding glycans. The mannose receptor is important as it has major roles in diverse biological processes, including regulation of circulating levels of reproductive hormones, homeostasis, innate immunity, and infections. These different functions involve the recognition of a wide range of glycans, and their nature is currently under intense study. But the mannose receptor is just one of many glycan-binding proteins expressed in macrophages, leading to an interest in the potential relationship between the macrophage glycome and how it may regulate cognate glycan-binding protein activities. This review focuses primarily on the mannose receptor and its carbohydrate ligands, as well as macrophages and their glycomes.
Collapse
Affiliation(s)
- Richard D Cummings
- Beth Israel Deaconess Medical Center, Department of Surgery, Harvard Medical School, CLS 11087 - 3 Blackfan Circle, Boston, MA, 02115, USA.
| |
Collapse
|
6
|
Vogel A, Brunner JS, Hajto A, Sharif O, Schabbauer G. Lipid scavenging macrophages and inflammation. Biochim Biophys Acta Mol Cell Biol Lipids 2022; 1867:159066. [PMID: 34626791 DOI: 10.1016/j.bbalip.2021.159066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 08/18/2021] [Indexed: 12/11/2022]
Abstract
Macrophages are professional phagocytes, indispensable for maintenance of tissue homeostasis and integrity. Depending on their resident tissue, macrophages are exposed to highly diverse metabolic environments. Adapted to their niche, they can contribute to local metabolic turnover through metabolite uptake, conversion, storage and release. Disturbances in tissue homeostasis caused by infection, inflammation or damage dramatically alter the local milieu, impacting macrophage activation status and metabolism. In the case of persisting stimuli, defective macrophage responses ensue, which can promote tissue damage and disease. Especially relevant herein are disbalances in lipid rich environments, where macrophages are crucially involved in lipid uptake and turnover, preventing lipotoxicity. Lipid uptake is to a large extent facilitated by macrophage expressed scavenger receptors that are dynamically regulated and important in many metabolic diseases. Here, we review the receptors mediating lipid uptake and summarize recent findings on their role in health and disease. We further highlight the underlying pathways driving macrophage lipid acquisition and their impact on myeloid metabolic remodelling.
Collapse
Affiliation(s)
- Andrea Vogel
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria; Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Julia Stefanie Brunner
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria; Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Alexander Hajto
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria; Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Omar Sharif
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria; Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria.
| | - Gernot Schabbauer
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria; Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria.
| |
Collapse
|
7
|
Cramer J. Medicinal chemistry of the myeloid C-type lectin receptors Mincle, Langerin, and DC-SIGN. RSC Med Chem 2021; 12:1985-2000. [PMID: 35024612 PMCID: PMC8672822 DOI: 10.1039/d1md00238d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/14/2021] [Indexed: 01/07/2023] Open
Abstract
In their role as pattern-recognition receptors on cells of the innate immune system, myeloid C-type lectin receptors (CLRs) assume important biological functions related to immunity, homeostasis, and cancer. As such, this family of receptors represents an appealing target for therapeutic interventions for modulating the outcome of many pathological processes, in particular related to infectious diseases. This review summarizes the current state of research into glycomimetic or drug-like small molecule ligands for the CLRs Mincle, Langerin, and DC-SIGN, which have potential therapeutic applications in vaccine research and anti-infective therapy.
Collapse
Affiliation(s)
- Jonathan Cramer
- Institute for Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-University of Düsseldorf Universitätsstr. 1 40225 Düsseldorf Germany
| |
Collapse
|
8
|
Zhao YJ, He WM, Zhao ZY, Li WH, Wang QW, Hou YN, Tan Y, Zhang D. Acidic pH irreversibly activates the signaling enzyme SARM1. FEBS J 2021; 288:6783-6794. [PMID: 34213829 DOI: 10.1111/febs.16104] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/06/2021] [Accepted: 07/01/2021] [Indexed: 02/04/2023]
Abstract
SARM1, an executioner in axon degeneration, is an autoinhibitory NAD-consuming enzyme, composed of multiple domains. NMN and its analogs, CZ-48 and VMN, are the only known activators, which can release the inhibitory ARM domain from the enzymatic TIR domain. Here, we document that acid can also activate SARM1, even more efficiently than NMN, possibly via the protonation of the negative residues. Systematic mutagenesis revealed that a single mutation, E689Q in TIR, led to the constitutive activation of SARM1. It forms a salt bridge with R216 in the neighboring ARM, maintaining the autoinhibitory structure. Using this 'acid activation' protocol, mutation K597E was found to inhibit activation, while H685A eliminated SARM1 catalytic activity, revealing two distinct inhibitory mechanisms. The protocol has also been applied to differentiate two classes of chemical inhibitors. NAD, dHNN, disulfiram, CHAPS, and TRX-100 mainly inhibited the activation process, while nicotinamide and Tweens mainly inhibited SARM1 catalysis. Taken together, we demonstrate a new mechanism for SARM1 activation and decipher two distinct inhibitory mechanisms of SARM1.
Collapse
Affiliation(s)
- Yong Juan Zhao
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, China.,Ciechanover Institute of Precision and Regenerative Medicine, School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, China.,Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, China
| | - Wei Ming He
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, China
| | - Zhi Ying Zhao
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, China
| | - Wan Hua Li
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, China.,Ciechanover Institute of Precision and Regenerative Medicine, School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, China
| | - Qian Wen Wang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, China
| | - Yun Nan Hou
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen University Town, China
| | - Yongjun Tan
- Department of Biology, College of Arts and Sciences, Saint Louis University, MO, USA
| | - Dapeng Zhang
- Department of Biology, College of Arts and Sciences, Saint Louis University, MO, USA.,Program of Bioinformatics and Computational Biology, College of Arts and Sciences, Saint Louis University, MO, USA
| |
Collapse
|
9
|
A fresh trim provides a new look at the human mannose receptor. J Biol Chem 2021; 297:100922. [PMID: 34181947 PMCID: PMC8294574 DOI: 10.1016/j.jbc.2021.100922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
The human mannose receptor plays an important role in scavenging a variety of glycans and glycoconjugates, which contributes to both innate and adaptive immunity. However, the fine details of its ligand specificity, and specifically that of carbohydrate-recognition domain 4, the most functionally relevant C-type lectin domain within the receptor, are not completely understood. Feinberg et al. use glycan arrays, crystallography, and a newly trimmed version of carbohydrate-recognition domain 4 to elucidate the molecular mechanisms driving binding specificity. These data contribute to our molecular understanding of Ca2+-mediated binding promiscuity in the human mannose receptor and the scavenging role of the receptor itself and highlight unexpected interactions that should inspire further study.
Collapse
|
10
|
Ismaya WT, Tjandrawinata RR, Rachmawati H. Prediction of the Mannose-Binding Site in the Agaricus bisporus Mannose-Binding Protein. Protein J 2021; 40:554-561. [PMID: 33959874 DOI: 10.1007/s10930-021-09993-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2021] [Indexed: 11/29/2022]
Abstract
Agaricus bisporus mannose-binding protein (Abmb) was discovered as part of mushroom tyrosinase (PPO3) complex. Apart from its presence, nothing is known about its function or activity in the mushroom. The protein is evolutionarily related to lectins with β-trefoil fold, which are glucose or galactose (and their derivatives) binding proteins. Abmb is also recently showed to display the typical agglutination activity of lectin when in complex with PPO3; this further supports Abmb similarity to its structural homologs from lectin with β-trefoil fold. However, Abmb has no affinity towards glucose or galactose but for mannose, thus its binding to the sugar may be different from its homologs. To date, the natural ligand of Abmb is unknown and the structure of Abmb in the presence of a ligand is not available. Therefore, the mannose-binding site of Abmb was predicted using molecular docking, which was consulted with the information from its structural homologs. This conservative approach would prevent over-speculation. The mannose-binding site of Abmb is likely located in the same region to that of Abmb structural homologs but with a shift in position due to the presence of additional surface loop. In addition, benefiting from the information from an in vitro study on Abmb sugar specificity, the mannose poses suggested that the sugar might interact with the side chains of Arg15, Thr45, Gln48, Asp49, Asp51 and Arg51. Most of these residues were equally present in Abmb structural homologs despite variation of their positions in the amino acid sequence. The variation probably originates from alteration of its amino acid sequence during evolution.
Collapse
Affiliation(s)
- Wangsa Tirta Ismaya
- Dexa Laboratories of Biomolecular Sciences, Industri Selatan V, PP-7, 17550, Cikarang, Indonesia.
| | | | - Heni Rachmawati
- Research Group of Pharmaceutics, School of Pharmacy, Bandung Institute of Technology, Ganesa 10, 40132, Bandung, Indonesia. .,Research Center for Nanosciences and Nanotechnology, Bandung Institute of Technology, Ganesa 10, 40132, Bandung, Indonesia.
| |
Collapse
|
11
|
Su M, Hu H, Zhao X, Huang C, Yang B, Yin Z. Construction of mannose-modified polyethyleneimine-block-polycaprolactone cationic polymer micelles and its application in acute lung injury. Drug Deliv Transl Res 2021; 12:1080-1095. [PMID: 33893615 DOI: 10.1007/s13346-021-00976-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/01/2021] [Indexed: 11/30/2022]
Abstract
This study evaluated the D-mannose modified polyethyleneimine-block-polycaprolactone biomacromolecule copolymer micelles (PCL-PEI-mannose) as a targeted delivery of the glucocorticoid dexamethasone (DXM) to lung inflammation tissues and enhances the vehicle for its anti-inflammatory effects. Dexamethasone was encapsulated in the hydrophobic core of cationic polymer micelles by solvent evaporation. The polymeric micelles exhibited sustained-release within 48 h, good blood compatibility, and colloidal stability in vitro. The cellular uptake of mannose-modified micelles was higher compared with the non-modified micelles. And drug-loaded targeted micelles could inhibit the production of inflammatory factors in activated RAW264.7 cells. The distribution results indicated that drug-loaded targeted micelles highly improved the lung targeting ability, reduced the wet/dry ratio of injured lung tissue, and relieved the lung inflammation, accompanied by the decrease of inflammatory cell infiltration, myeloperoxidase activity, and inflammatory mediator levels in bronchoalveolar lavage fluid. These findings suggested that PCL-PEI-mannose delivery system could facilitate the lung-specific delivery and inhibit the inflammatory response. Collectively, PCL-PEI-mannose polymer micelles could be used as a potential delivery system for the treatment of acute lung injury (ALI).
Collapse
Affiliation(s)
- Meiling Su
- Key Laboratory of Drug Targeting and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Heping Hu
- Key Laboratory of Drug Targeting and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Xuan Zhao
- Key Laboratory of Drug Targeting and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Chengyuan Huang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Bowen Yang
- Department of Obstetrics and Gynecology, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, People's Republic of China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Sichuan University, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Zongning Yin
- Key Laboratory of Drug Targeting and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China.
| |
Collapse
|
12
|
Feinberg H, Jégouzo SAF, Lasanajak Y, Smith DF, Drickamer K, Weis WI, Taylor ME. Structural analysis of carbohydrate binding by the macrophage mannose receptor CD206. J Biol Chem 2021; 296:100368. [PMID: 33545173 PMCID: PMC7949135 DOI: 10.1016/j.jbc.2021.100368] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 01/27/2021] [Accepted: 02/01/2021] [Indexed: 02/06/2023] Open
Abstract
The human mannose receptor expressed on macrophages and hepatic endothelial cells scavenges released lysosomal enzymes, glycopeptide fragments of collagen, and pathogenic microorganisms and thus reduces damage following tissue injury. The receptor binds mannose, fucose, or N-acetylglucosamine (GlcNAc) residues on these targets. C-type carbohydrate-recognition domain 4 (CRD4) of the receptor contains the site for Ca2+-dependent interaction with sugars. To investigate the details of CRD4 binding, glycan array screening was used to identify oligosaccharide ligands. The strongest signals were for glycans that contain either Manα1-2Man constituents or fucose in various linkages. The mechanisms of binding to monosaccharides and oligosaccharide substructures present in many of these ligands were examined in multiple crystal structures of CRD4. Binding of mannose residues to CRD4 results primarily from interaction of the equatorial 3- and 4-OH groups with a conserved principal Ca2+ common to almost all sugar-binding C-type CRDs. In the Manα1-2Man complex, supplementary interactions with the reducing mannose residue explain the enhanced affinity for this disaccharide. Bound GlcNAc also interacts with the principal Ca2+ through equatorial 3- and 4-OH groups, whereas fucose residues can bind in several orientations, through either the 2- and 3-OH groups or the 3- and 4-OH groups. Secondary contacts with additional sugars in fucose-containing oligosaccharides, such as the Lewis-a trisaccharide, provide enhanced affinity for these glycans. These results explain many of the biologically important interactions of the mannose receptor with both mammalian glycoproteins and microbes such as yeast and suggest additional classes of ligands that have not been previously identified.
Collapse
Affiliation(s)
- Hadar Feinberg
- Departments of Structural Biology and Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California, USA
| | - Sabine A F Jégouzo
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Yi Lasanajak
- Emory Comprehensive Glycomics Core, Emory University School of Medicine, Atlanta, Georgia, USA
| | - David F Smith
- Emory Comprehensive Glycomics Core, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Kurt Drickamer
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - William I Weis
- Departments of Structural Biology and Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California, USA.
| | - Maureen E Taylor
- Department of Life Sciences, Imperial College London, London, United Kingdom.
| |
Collapse
|
13
|
Huang J, Jiang Y, Liu Y, Ren Y, Xu Z, Li Z, Zhao Y, Wu X, Ren J. Marine-inspired molecular mimicry generates a drug-free, but immunogenic hydrogel adhesive protecting surgical anastomosis. Bioact Mater 2020; 6:770-782. [PMID: 33024898 PMCID: PMC7527377 DOI: 10.1016/j.bioactmat.2020.09.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/13/2020] [Accepted: 09/16/2020] [Indexed: 02/07/2023] Open
Abstract
Herein, we report the synthesis of a biomimic hydrogel adhesive that addresses the poor healing of surgical anastomosis. Dopamine-conjugated xanthan gum (Da-g-Xan) is fabricated using deep insights into the molecular similarity between mussels' adhesive and dopamine as well as the structural similarity between barnacle cement proteins and xanthan gum. The hydrogel mimics marine animals’ adherence to wet tissue surfaces. Upon applying this adhesive to colonic anastomosis in a rat model, protective effects were shown by significantly improving the bursting pressure. Mechanistically, the architecture of Da-g-Xan hydrogel is maintained by dynamic intermolecular hydrogen bonds that allow the quick release of Da-g-Xan. The free Da-g-Xan can regulate the inflammatory status and induce type 2 macrophage polarization (M2) by specifically interacting with mannose receptors (CD206) revealed by RNA-sequencing and molecular binding assays. Consequently, an appropriate microenvironment for tissue healing is created by the secretion of chemokines and growth factors from M2 macrophages, strengthening the fibroblast migration and proliferation, collagen synthesis and epithelial vascularization. Overall, this study demonstrates an unprecedented strategy for generating an adhesive by synergistic mimicry inspired by two marine animals, and the results show that the Da-g-Xan adhesive augments native tissue regenerative responses, thus enabling enhanced recovery following surgical anastomosis. Dual-biomimic conjugates, Da-g-Xan, are synthesized. Da-g-Xan adhesive hydrogels are degradable, self-healing, and injectable. Released Da-g-Xan induces type 2 macrophage polarizations by specifically interacting with mannose receptors. Paracrine action by the type 2 macrophage polarizations promotes the surgical anastomosis healing.
Collapse
Affiliation(s)
- Jinjian Huang
- PLA Key Laboratory of Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Yungang Jiang
- PLA Key Laboratory of Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Ye Liu
- PLA Key Laboratory of Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Yanhan Ren
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA
| | - Ziyan Xu
- PLA Key Laboratory of Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, School of Medicine, Southeast University, Nanjing, 210009, China.,School of Medicine, Nanjing University, Nanjing, 210093, China
| | - Zongan Li
- Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, NARI School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Yun Zhao
- Gastrointestinal Unit and Center for the Study of Inflammatory Bowel Disease, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA
| | - Xiuwen Wu
- PLA Key Laboratory of Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Jianan Ren
- PLA Key Laboratory of Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| |
Collapse
|
14
|
Nielsen MC, Hvidbjerg Gantzel R, Clària J, Trebicka J, Møller HJ, Grønbæk H. Macrophage Activation Markers, CD163 and CD206, in Acute-on-Chronic Liver Failure. Cells 2020; 9:cells9051175. [PMID: 32397365 PMCID: PMC7290463 DOI: 10.3390/cells9051175] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/29/2020] [Accepted: 05/04/2020] [Indexed: 02/06/2023] Open
Abstract
Macrophages facilitate essential homeostatic functions e.g., endocytosis, phagocytosis, and signaling during inflammation, and express a variety of scavenger receptors including CD163 and CD206, which are upregulated in response to inflammation. In healthy individuals, soluble forms of CD163 and CD206 are constitutively shed from macrophages, however, during inflammation pathogen- and damage-associated stimuli induce this shedding. Activation of resident liver macrophages viz. Kupffer cells is part of the inflammatory cascade occurring in acute and chronic liver diseases. We here review the existing literature on sCD163 and sCD206 function and shedding, and potential as biomarkers in acute and chronic liver diseases with a particular focus on Acute-on-Chronic Liver Failure (ACLF). In multiple studies sCD163 and sCD206 are elevated in relation to liver disease severity and established as reliable predictors of morbidity and mortality. However, differences in expression- and shedding-stimuli for CD163 and CD206 may explain dissimilarities in prognostic utility in patients with acute decompensation of cirrhosis and ACLF.
Collapse
Affiliation(s)
- Marlene Christina Nielsen
- Department of Clinical Biochemistry, Aarhus University Hospital, 8200 Aarhus N, Denmark; (M.C.N.); (H.J.M.)
| | - Rasmus Hvidbjerg Gantzel
- Department of Hepatology & Gastroenterology, Aarhus University Hospital, 8200 Aarhus N, Denmark;
| | - Joan Clària
- European Foundation for the Study of Chronic Liver Failure (EF-CLIF), 08021 Barcelona, Spain; (J.C.); (J.T.)
- Department of Biochemistry and Molecular Genetics, Hospital Clínic-IDIBAPS, 08036 Barcelona, Spain
| | - Jonel Trebicka
- European Foundation for the Study of Chronic Liver Failure (EF-CLIF), 08021 Barcelona, Spain; (J.C.); (J.T.)
- Translational Hepatology, Department of Internal Medicine I, Goethe University Frankfurt, 60323 Frankfurt, Germany
| | - Holger Jon Møller
- Department of Clinical Biochemistry, Aarhus University Hospital, 8200 Aarhus N, Denmark; (M.C.N.); (H.J.M.)
| | - Henning Grønbæk
- Department of Hepatology & Gastroenterology, Aarhus University Hospital, 8200 Aarhus N, Denmark;
- Correspondence: ; Tel.: +45-21-67-92-81
| |
Collapse
|