1
|
Lu YZ, Nayer B, Singh SK, Alshoubaki YK, Yuan E, Park AJ, Maruyama K, Akira S, Martino MM. CGRP sensory neurons promote tissue healing via neutrophils and macrophages. Nature 2024; 628:604-611. [PMID: 38538784 PMCID: PMC11023938 DOI: 10.1038/s41586-024-07237-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 02/26/2024] [Indexed: 04/06/2024]
Abstract
The immune system has a critical role in orchestrating tissue healing. As a result, regenerative strategies that control immune components have proved effective1,2. This is particularly relevant when immune dysregulation that results from conditions such as diabetes or advanced age impairs tissue healing following injury2,3. Nociceptive sensory neurons have a crucial role as immunoregulators and exert both protective and harmful effects depending on the context4-12. However, how neuro-immune interactions affect tissue repair and regeneration following acute injury is unclear. Here we show that ablation of the NaV1.8 nociceptor impairs skin wound repair and muscle regeneration after acute tissue injury. Nociceptor endings grow into injured skin and muscle tissues and signal to immune cells through the neuropeptide calcitonin gene-related peptide (CGRP) during the healing process. CGRP acts via receptor activity-modifying protein 1 (RAMP1) on neutrophils, monocytes and macrophages to inhibit recruitment, accelerate death, enhance efferocytosis and polarize macrophages towards a pro-repair phenotype. The effects of CGRP on neutrophils and macrophages are mediated via thrombospondin-1 release and its subsequent autocrine and/or paracrine effects. In mice without nociceptors and diabetic mice with peripheral neuropathies, delivery of an engineered version of CGRP accelerated wound healing and promoted muscle regeneration. Harnessing neuro-immune interactions has potential to treat non-healing tissues in which dysregulated neuro-immune interactions impair tissue healing.
Collapse
Affiliation(s)
- Yen-Zhen Lu
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia
| | - Bhavana Nayer
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia
| | - Shailendra Kumar Singh
- Laboratory of Host Defense, World Premier International Research Center, Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Yasmin K Alshoubaki
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia
| | - Elle Yuan
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia
| | - Anthony J Park
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia
| | - Kenta Maruyama
- Laboratory of Host Defense, World Premier International Research Center, Immunology Frontier Research Center, Osaka University, Osaka, Japan
- Department of Pharmacology, School of Medicine, Aichi Medical University, Aichi, Japan
| | - Shizuo Akira
- Laboratory of Host Defense, World Premier International Research Center, Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Mikaël M Martino
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia.
- Laboratory of Host Defense, World Premier International Research Center, Immunology Frontier Research Center, Osaka University, Osaka, Japan.
- Victorian Heart Institute, Monash University, Melbourne, Victoria, Australia.
| |
Collapse
|
2
|
Alshoubaki YK, Lu YZ, Legrand JMD, Karami R, Fossat M, Salimova E, Julier Z, Martino MM. A superior extracellular matrix binding motif to enhance the regenerative activity and safety of therapeutic proteins. NPJ Regen Med 2023; 8:25. [PMID: 37217533 DOI: 10.1038/s41536-023-00297-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 05/04/2023] [Indexed: 05/24/2023] Open
Abstract
Among therapeutic proteins, cytokines and growth factors have great potential for regenerative medicine applications. However, these molecules have encountered limited clinical success due to low effectiveness and major safety concerns, highlighting the need to develop better approaches that increase efficacy and safety. Promising approaches leverage how the extracellular matrix (ECM) controls the activity of these molecules during tissue healing. Using a protein motif screening strategy, we discovered that amphiregulin possesses an exceptionally strong binding motif for ECM components. We used this motif to confer the pro-regenerative therapeutics platelet-derived growth factor-BB (PDGF-BB) and interleukin-1 receptor antagonist (IL-1Ra) a very high affinity to the ECM. In mouse models, the approach considerably extended tissue retention of the engineered therapeutics and reduced leakage in the circulation. Prolonged retention and minimal systemic diffusion of engineered PDGF-BB abolished the tumour growth-promoting adverse effect that was observed with wild-type PDGF-BB. Moreover, engineered PDGF-BB was substantially more effective at promoting diabetic wound healing and regeneration after volumetric muscle loss, compared to wild-type PDGF-BB. Finally, while local or systemic delivery of wild-type IL-1Ra showed minor effects, intramyocardial delivery of engineered IL-1Ra enhanced cardiac repair after myocardial infarction by limiting cardiomyocyte death and fibrosis. This engineering strategy highlights the key importance of exploiting interactions between ECM and therapeutic proteins for developing effective and safer regenerative therapies.
Collapse
Affiliation(s)
- Yasmin K Alshoubaki
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia
| | - Yen-Zhen Lu
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia
| | - Julien M D Legrand
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia
| | - Rezvan Karami
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia
| | - Mathilde Fossat
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia
| | - Ekaterina Salimova
- Monash Biomedical Imaging, Monash University, Clayton, VIC, 3800, Australia
| | - Ziad Julier
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia
| | - Mikaël M Martino
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia.
- Victorian Heart Institute, Monash University, Clayton, VIC, 3800, Australia.
- Laboratory of Host Defense, World Premier Institute Immunology Frontier Research Center, Osaka University, Osaka, 565-0871, Japan.
| |
Collapse
|
3
|
Su N, Villicana C, Barati D, Freeman P, Luo Y, Yang F. Stem Cell Membrane-Coated Microribbon Scaffolds Induce Regenerative Innate and Adaptive Immune Responses in a Critical-Size Cranial Bone Defect Model. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2208781. [PMID: 36560890 PMCID: PMC10057912 DOI: 10.1002/adma.202208781] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/09/2022] [Indexed: 05/31/2023]
Abstract
Naturally-derived cell membranes have shown great promise in functionalizing nanoparticles to enhance biointerfacing functions for drug delivery applications. However, its potential for functionalizing macroporous scaffolds to enhance tissue regeneration in vivo remains unexplored. Engineering scaffolds with immunomodulatory functions represents an exciting strategy for tissue regeneration but is largely limited to soft tissues. Critical-sized bone defects cannot heal on their own, and the role of adaptive immune cells in scaffold-mediated healing of cranial bone defects remains largely unknown. Here, mensenchymal stem cell membrane (MSCM)-coated microribbon (µRB) scaffolds for treating critical size cranial bone defects via targeting immunomodulation are reported. Confocal imaging and proteomic analyses are used to confirm successful coating and characterize the compositions of cell membrane coating. It is demonstrated that MSCM coating promotes macrophage (Mφ) polarization toward regenerative phenotype, induces CD8+ T cell apoptosis, and enhances regulatory T cell differentiation in vitro and in vivo. When combined with a low dosage of BMP-2, MSCM coating further accelerates bone regeneration and suppresses inflammation. These results establish cell membrane-coated microribbon scaffolds as a promising strategy for treating critical size bone defects via immunomodulation. The platform may be broadly used with different cell membranes and scaffolds to enhance regeneration of multiple tissue types.
Collapse
Affiliation(s)
- Ni Su
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Cassandra Villicana
- Department of Bioengineering, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Danial Barati
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Peyton Freeman
- Department of Bioengineering, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ying Luo
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, USA 02155
| | - Fan Yang
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
- Department of Bioengineering, Stanford University School of Medicine, Stanford, CA, 94305, USA
| |
Collapse
|
4
|
Jiang F, Qi X, Wu X, Lin S, Shi J, Zhang W, Jiang X. Regulating macrophage-MSC interaction to optimize BMP-2-induced osteogenesis in the local microenvironment. Bioact Mater 2023; 25:307-318. [PMID: 36844362 PMCID: PMC9947106 DOI: 10.1016/j.bioactmat.2023.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 02/01/2023] [Accepted: 02/01/2023] [Indexed: 02/12/2023] Open
Abstract
Bone morphogenetic protein (BMP-2) has been approved by the FDA to promote bone regeneration, but uncertain osteogenic effect and dose-dependent side effects may occur. Osteoimmunomodulation plays an important role in growth factor-based osteogenesis. Here, we explored how proinflammatory signals affect the dose-dependent osteogenic potential of BMP-2. We observed that the expression level of local IL-1β did not increase with the dose of BMP-2 in the mouse osteogenesis model. A low dose of BMP-2 could not promote new bone formation, but trigger the release of IL-1β from M1 macrophages. As the dose of BMP-2 increased, the IL-1β expression and M1 infiltration in local microenvironment were inhibited by IL-1Ra from MSCs under osteogenic differentiation induced by BMP-2, and new bone tissues formed, even excessively. Anti-inflammatory drugs (Dexamethasone, Dex) promoted osteogenesis via inhibiting M1 polarization and enhancing BMP-2-induced MSC osteo-differentiation. Thus, we suggest that the osteogenic effect of BMP-2 involves macrophage-MSC interaction that is dependent on BMP-2 dose and based on IL-1R1 ligands, including IL-1β and IL-1Ra. The dose of BMP-2 could be reduced by introducing immunoregulatory strategies.
Collapse
Affiliation(s)
- Fei Jiang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No.639, Zhizaoju Road, Shanghai, 200011, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, No.639, Zhizaoju Road, Shanghai, 200011, China
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, No. 140, Han Zhong Road, Nanjing, 210029, China
- Department of General Dentistry, Affiliated Hospital of Stomatology, Nanjing Medical University, No. 136, Han Zhong Road, Nanjing, 210029, China
| | - Xuanyu Qi
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No.639, Zhizaoju Road, Shanghai, 200011, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, No.639, Zhizaoju Road, Shanghai, 200011, China
| | - Xiaolin Wu
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No.639, Zhizaoju Road, Shanghai, 200011, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, No.639, Zhizaoju Road, Shanghai, 200011, China
| | - Sihan Lin
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No.639, Zhizaoju Road, Shanghai, 200011, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, No.639, Zhizaoju Road, Shanghai, 200011, China
| | - Junfeng Shi
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No.639, Zhizaoju Road, Shanghai, 200011, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, No.639, Zhizaoju Road, Shanghai, 200011, China
| | - Wenjie Zhang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No.639, Zhizaoju Road, Shanghai, 200011, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, No.639, Zhizaoju Road, Shanghai, 200011, China
| | - Xinquan Jiang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No.639, Zhizaoju Road, Shanghai, 200011, China
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, No.639, Zhizaoju Road, Shanghai, 200011, China
- Corresponding author. Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No.639, Zhizaoju Road, Shanghai, 200011, China.
| |
Collapse
|
5
|
Chen S, Wang H, Liu D, Bai J, Haugen HJ, Li B, Yan H. Early osteoimmunomodulation by mucin hydrogels augments the healing and revascularization of rat critical-size calvarial bone defects. Bioact Mater 2023; 25:176-188. [PMID: 36817825 PMCID: PMC9932297 DOI: 10.1016/j.bioactmat.2023.01.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/08/2023] [Accepted: 01/29/2023] [Indexed: 02/05/2023] Open
Abstract
The design principle of osteogenic bone grafts has shifted from immunological inertness to limiting foreign body response to combined osteoimmunomodulatory activity to promote high-quality endogenous bone regeneration. Recently developed immunomodulatory mucin hydrogels have been shown to elicit very low complement activation and suppress macrophage release and activation after implantation in vivo. However, their immunoregulatory activity has not yet been studied in the context of tissue repair. Herein, we synthesized mucin-monetite composite materials and investigated their early osteoimmunomodulation using a critical-size rat bone defect model. We demonstrated that the composites can polarize macrophages towards the M2 phenotype at weeks 1 and 2. The early osteoimmunomodulation enhanced early osteogenesis and angiogenesis and ultimately promoted fracture healing and engraftment (revascularization of the host vasculature) at weeks 6 and 12. Overall, we demonstrated the applicability of mucin-based immunomodulatory biomaterials to enhance tissue repair in tissue engineering and regenerative medicine.
Collapse
Affiliation(s)
- Song Chen
- Orthopedic Institute, Department of Orthopedic Surgery, The First Affiliated Hospital, School of Biology & Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, China
| | - Huan Wang
- Orthopedic Institute, Department of Orthopedic Surgery, The First Affiliated Hospital, School of Biology & Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, China
| | - Dachuan Liu
- Orthopedic Institute, Department of Orthopedic Surgery, The First Affiliated Hospital, School of Biology & Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, China
| | - Jianzhong Bai
- Orthopedic Institute, Department of Orthopedic Surgery, The First Affiliated Hospital, School of Biology & Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, China
| | - Håvard Jostein Haugen
- Department of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109 Blindern, Oslo, 0376, Norway
| | - Bin Li
- Orthopedic Institute, Department of Orthopedic Surgery, The First Affiliated Hospital, School of Biology & Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, China,Corresponding author.
| | - Hongji Yan
- AIMES - Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institute and KTH Royal Institute of Technology, 171 77, Stockholm, Sweden,Department of Neuroscience, Karolinska Institute, 171 77, Stockholm, Sweden,Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Center, 106 91, Stockholm, Sweden,Corresponding author. AIMES - Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, 171 77, Stockholm, Sweden.
| |
Collapse
|
6
|
Panos JA, Coenen MJ, Nagelli CV, McGlinch EB, Atasoy-Zeybek A, De Padilla CL, Coghlan RF, Johnstone B, Ferreira E, Porter RM, De la Vega RE, Evans CH. IL-1Ra gene transfer potentiates BMP2-mediated bone healing by redirecting osteogenesis toward endochondral ossification. Mol Ther 2023; 31:420-434. [PMID: 36245128 PMCID: PMC9931547 DOI: 10.1016/j.ymthe.2022.10.007] [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: 05/23/2022] [Revised: 09/14/2022] [Accepted: 10/14/2022] [Indexed: 11/05/2022] Open
Abstract
An estimated 100,000 patients each year in the United States suffer severe disability from bone defects that fail to heal, a condition where bone-regenerative therapies could provide substantial clinical benefits. Although recombinant human bone morphogenetic protein-2 (rhBMP2) is an osteogenic growth factor that is clinically approved for this purpose, it is only effective when used at exceedingly high doses that incur substantial costs, induce severe inflammation, produce adverse side effects, and form morphologically abnormal bone. Using a validated rat femoral segmental defect model, we show that bone formed in response to clinically relevant doses of rhBMP2 is accompanied by elevated expression of interleukin-1 (IL-1). Local delivery of cDNA encoding the IL-1 receptor antagonist (IL-1Ra) achieved bridging of segmental, critical size defects in bone with a 90% lower dose of rhBMP2. Unlike use of high-dose rhBMP2, bone formation in the presence of IL-1Ra occurred via the native process of endochondral ossification, resulting in improved quality without sacrificing the mechanical properties of the regenerated bone. Our results demonstrate that local immunomodulation may permit effective use of growth factors at lower doses to recapitulate more precisely the native biology of healing, leading to higher-quality tissue regeneration.
Collapse
Affiliation(s)
- Joseph A Panos
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN, USA; Musculoskeletal Gene Therapy Research Laboratory, Mayo Clinic, Rochester, MN, USA; Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN, USA; Medical Scientist Training Program, Mayo Clinic, Rochester, MN, USA
| | - Michael J Coenen
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN, USA; Musculoskeletal Gene Therapy Research Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Christopher V Nagelli
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN, USA; Musculoskeletal Gene Therapy Research Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Erin B McGlinch
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN, USA; Musculoskeletal Gene Therapy Research Laboratory, Mayo Clinic, Rochester, MN, USA; Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN, USA; Virology and Gene Therapy Graduate Program, Mayo Clinic, Rochester, MN, USA
| | - Aysegul Atasoy-Zeybek
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN, USA; Musculoskeletal Gene Therapy Research Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Consuelo Lopez De Padilla
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN, USA; Musculoskeletal Gene Therapy Research Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Ryan F Coghlan
- Research Center, Shriners Hospitals for Children, Portland, OR, USA
| | - Brian Johnstone
- Research Center, Shriners Hospitals for Children, Portland, OR, USA; Department of Orthopedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA
| | - Elisabeth Ferreira
- Center for Musculoskeletal Disease Research, Departments of Internal Medicine and Orthopedic Surgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Ryan M Porter
- Center for Musculoskeletal Disease Research, Departments of Internal Medicine and Orthopedic Surgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Rodolfo E De la Vega
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN, USA; Musculoskeletal Gene Therapy Research Laboratory, Mayo Clinic, Rochester, MN, USA; Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute, Maastricht, the Netherlands
| | - Christopher H Evans
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN, USA; Musculoskeletal Gene Therapy Research Laboratory, Mayo Clinic, Rochester, MN, USA.
| |
Collapse
|
7
|
Toita R, Kang JH, Tsuchiya A. Phosphatidylserine liposome multilayers mediate the M1-to-M2 macrophage polarization to enhance bone tissue regeneration. Acta Biomater 2022; 154:583-596. [PMID: 36273800 DOI: 10.1016/j.actbio.2022.10.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 10/10/2022] [Accepted: 10/11/2022] [Indexed: 12/14/2022]
Abstract
An appropriate immune microenvironment, governed by macrophages, is essential for rapid tissue regeneration after biomaterial implantation. The macrophage phenotypes, M1 (inflammatory) and M2 (anti-inflammatory/healing), exert opposing effects on the repair of various tissues. In this study, a new strategy to promote tissue repair and tissue-to-biomaterial integration by M1-to-M2 macrophage transition using artificial apoptotic cell mimetics (phosphatidylserine liposomes; PSLs) was developed using bone as a model tissue. Titanium was also selected as a model substrate material because it is widely used for dental and orthopedic implants. Titanium implants were functionalized with multilayers via layer-by-layer assembly of cationic protamine and negatively charged PSLs that were chemically stabilized to prevent disruption of lipid bilayers. Samples carrying PSL multilayers could drive M1-type macrophages into M2-biased phenotypes, resulting in a dramatic change in macrophage secretion for tissue regeneration. In a rat femur implantation model, the PSL-multilayer-coated implant displayed augmented de novo bone formation and bone-to-implant integration, associated with an increased M1-to-M2-like phenotypic transition. This triggered the proper generation and activation of bone-forming osteoblasts and bone-resorbing osteoclasts relative to their uncoated counterparts. This study demonstrates the benefit of local M1-to-M2 macrophage polarization induced by PSL-multilayers constructed on implants for potent bone regeneration and bone-to-implant integration. The results of this study may help in the design of new immunomodulatory biomaterials. STATEMENT OF SIGNIFICANCE: Effective strategies for tissue regeneration are essential in the clinical practice. The macrophage phenotypes, M1 (inflammatory) and M2 (anti-inflammatory/healing), exert opposing effects on the repair of various tissues. Artificially produced phosphatidylserine-containing liposomes (PSLs) can induce M2 macrophage polarization by mimicking the inverted plasma membranes of apoptotic cells. This study demonstrates the advantages of local M1-to-M2 macrophage polarization induced by PSL-multilayers constructed on implants for effective bone regeneration and osseointegration (bone-to-implant integration). Mechanistically, M2 macrophages promote osteogenesis but inhibit osteoclastogenesis, and M1 macrophages vice versa. We believe that our study makes a significant contribution to the design of new immunomodulatory biomaterials for regenerative medicine because it is the first to validate the benefit of PSLs for tissue regeneration.
Collapse
Affiliation(s)
- Riki Toita
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan; AIST-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, AIST, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Jeong-Hun Kang
- Division of Biopharmaceutics and Pharmacokinetics, National Cerebral and Cardiovascular Center Research Institute, 6-1 Shinmachi, Kishibe, Suita, Osaka, 564-8565, Japan
| | - Akira Tsuchiya
- Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| |
Collapse
|
8
|
Chen J, Zhou X, Sun W, Zhang Z, Teng W, Wang F, Sun H, Zhang W, Wang J, Yu X, Ye Z, Li W. Vascular Derived ECM Improves Therapeutic Index of BMP-2 and Drives Vascularized Bone Regeneration. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107991. [PMID: 35218305 DOI: 10.1002/smll.202107991] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Vascularized osteogenesis is essential for successful bone regeneration, yet its realization during large size bone defect healing remains challenging due to the difficulty to couple multiple biological processes. Herein, harnessing the intrinsic angiogenic potential of vascular derived extracellular matrix (vECM) and its specific affinity to growth factors, a vECM/GelMA based hybrid hydrogel delivery system is constructed to achieve optimized bone morphogenetic protein-2 (BMP-2) therapeutic index and provide intrinsic angiogenic induction during bone healing. The incorporation of vECM not only effectively regulates BMP-2 kinetics to match the bone healing timeframe, but also promotes angiogenesis both in vitro and in vivo. In vivo results also show that vECM-mediated BMP-2 release remarkably enhances vascularized bone formation for critical size bone defects. In particular, blood vessel ingrowth stained with CD31 marker in the defect area is substantially encouraged over the course of healing, suggesting incorporation of vECM served roles in both angiogenesis and osteogenesis. Thus, the authors' study exemplifies that affinity of growth factor towards ECM may be a promising strategy to be leveraged to develop sophisticated delivery systems endowed with desirable properties for regenerative medicine applications.
Collapse
Affiliation(s)
- Jiayu Chen
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Xingzhi Zhou
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Wenquan Sun
- School of Medical and Food, University of Shanghai for Science and Technology, Shanghai, 201210, P. R. China
| | - Zengjie Zhang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Wangsiyuan Teng
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Fangqian Wang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Hangxiang Sun
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Wei Zhang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Jianwei Wang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Xiaohua Yu
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Zhaoming Ye
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| | - Weixu Li
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310000, P. R. China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang Province, 310000, P. R. China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, Zhejiang Province, 310000, P. R. China
| |
Collapse
|
9
|
Lackington WA, Gehweiler D, Zhao E, Zderic I, Nehrbass D, Zeiter S, González-Vázquez A, O'Brien FJ, Stoddart MJ, Thompson K. Interleukin-1 receptor antagonist enhances the therapeutic efficacy of a low dose of rhBMP-2 in a weight-bearing rat femoral defect model. Acta Biomater 2022; 149:189-197. [PMID: 35840106 DOI: 10.1016/j.actbio.2022.07.012] [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: 03/21/2022] [Revised: 07/01/2022] [Accepted: 07/06/2022] [Indexed: 11/01/2022]
Abstract
In the clinical treatment of fractures, rhBMP-2 administration is associated with a well-established profile of side-effects, including osteolysis and ectopic bone formation, which are driven by pro-inflammatory processes triggered by the use of high doses. Immunomodulatory strategies could minimize the incidence of side-effects by enabling the use of lower, and safer, rhBMP-2 doses. This study investigated whether interleukin-1 receptor antagonist (IL-1Ra) can enhance the therapeutic efficacy of a low dose of rhBMP-2 in a weight-bearing femoral fracture healing model. Exogenous IL-1Ra, in combination with rhBMP-2, was delivered using a collagen-hydroxyapatite scaffold (CHA) to attenuate IL-1β produced in response to fracture. Femoral defects were treated with CHA scaffolds alone, or loaded with IL-1Ra (2.5 µg), rhBMP-2 (1 µg), IL-1Ra (2.5 µg) in combination with rhBMP-2 (1 µg). Bone healing was assessed over 14 weeks in comparison to control groups, empty defect, and a higher dose of rhBMP-2 (5 µg), which were recently demonstrated to lead to non-union, and successful bridging of the defect, respectively. The combination of IL-1Ra and rhBMP-2 led to significantly faster early bone formation, at both week 4 and 6, compared to a low dose of rhBMP-2 alone. By 14 weeks, the combination of IL-1Ra and a rhBMP-2 promoted full bridging of femurs, which were 3-fold more mechanically reliable compared to the femurs treated with a low dose of rhBMP-2 alone. Taken together, this study demonstrates that IL-1Ra can significantly enhance femoral bone healing when used in combination with a low dose of rhBMP-2. STATEMENT OF SIGNIFICANCE: Enabling the use of lower and safer doses of rhBMP-2, a potent inducer of bone formation, is of clinical relevance in orthopaedic medicine. In this study, the immunomodulatory interleukin-1 receptor antagonist (IL-1Ra) was investigated for its capacity to enhance the therapeutic efficacy of rhBMP-2 when used at lower doses in a weight-bearing femoral fracture healing model. The combination of IL-1Ra and rhBMP-2 led to significantly faster early bone formation, and resulted in more mechanically reliable healed femurs, compared to a low dose of rhBMP-2 alone. This demonstrates for the first time in a rat long bone healing model that IL-1Ra can significantly enhance bone healing when used in combination with a low dose of rhBMP-2.
Collapse
Affiliation(s)
- William A Lackington
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland; Present address: Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biointerfaces, St. Gallen, Switzerland
| | - Dominic Gehweiler
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Ensi Zhao
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Ivan Zderic
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Dirk Nehrbass
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Stephan Zeiter
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Arlyng González-Vázquez
- Tissue Engineering Research Group, Dept. of Anatomy & Regenerative Medicine, Royal College of Surgeons in Ireland, University of Medicine and Health Sciences, 123 St Stephen's Green, Dublin, Ireland; AMBER Centre, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Fergal J O'Brien
- Tissue Engineering Research Group, Dept. of Anatomy & Regenerative Medicine, Royal College of Surgeons in Ireland, University of Medicine and Health Sciences, 123 St Stephen's Green, Dublin, Ireland; AMBER Centre, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Martin J Stoddart
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Keith Thompson
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland.
| |
Collapse
|
10
|
Kim YH, Oreffo ROC, Dawson JI. From hurdle to springboard: The macrophage as target in biomaterial-based bone regeneration strategies. Bone 2022; 159:116389. [PMID: 35301163 DOI: 10.1016/j.bone.2022.116389] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 03/03/2022] [Accepted: 03/10/2022] [Indexed: 12/16/2022]
Abstract
The past decade has seen a growing appreciation for the role of the innate immune response in mediating repair and biomaterial directed tissue regeneration. The long-held view of the host immune/inflammatory response as an obstacle limiting stem cell regenerative activity, has given way to a fresh appreciation of the pivotal role the macrophage plays in orchestrating the resolution of inflammation and launching the process of remodelling and repair. In the context of bone, work over the past decade has established an essential coordinating role for macrophages in supporting bone repair and sustaining biomaterial driven osteogenesis. In this review evidence for the role of the macrophage in bone regeneration and repair is surveyed before discussing recent biomaterial and drug-delivery based approaches that target macrophage modulation with the goal of accelerating and enhancing bone tissue regeneration.
Collapse
Affiliation(s)
- Yang-Hee Kim
- Bone and Joint Research Group, Centre for Human Development, Stem Cells & Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton SO16 6YD, UK
| | - Richard O C Oreffo
- Bone and Joint Research Group, Centre for Human Development, Stem Cells & Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton SO16 6YD, UK
| | - Jonathan I Dawson
- Bone and Joint Research Group, Centre for Human Development, Stem Cells & Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton SO16 6YD, UK.
| |
Collapse
|
11
|
Alshoubaki YK, Nayer B, Das S, Martino MM. OUP accepted manuscript. Stem Cells Transl Med 2022; 11:248-258. [PMID: 35303109 PMCID: PMC8968657 DOI: 10.1093/stcltm/szab022] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 11/09/2021] [Indexed: 12/04/2022] Open
Abstract
Numerous components of the immune system, including inflammatory mediators, immune cells and cytokines, have a profound modulatory effect on the homeostatic regulation and regenerative activity of endogenous stem cells and progenitor cells. Thus, understanding how the immune system interacts with stem/progenitor cells could build the foundation to design novel and more effective regenerative therapies. Indeed, utilizing and controlling immune system components may be one of the most effective approaches to promote tissue regeneration. In this review, we first summarize the effects of various immune cell types on endogenous stem/progenitor cells, focusing on the tissue healing context. Then, we present interesting regenerative strategies that control or mimic the effect of immune components on stem/progenitor cells, in order to enhance the regenerative capacity of endogenous and transplanted stem cells. We highlight the potential clinical translation of such approaches for multiple tissues and organ systems, as these novel regenerative strategies could considerably improve or eventually substitute stem cell-based therapies. Overall, harnessing the power of the cross-talk between the immune system and stem/progenitor cells holds great potential for the development of novel and effective regenerative therapies.
Collapse
Affiliation(s)
- Yasmin K Alshoubaki
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, Australia
| | - Bhavana Nayer
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, Australia
| | - Surojeet Das
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, Australia
| | - Mikaël M Martino
- European Molecular Biology Laboratory Australia, Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, Australia
- Laboratory of Host Defense, World Premier Institute Immunology Frontier Research Center, Osaka University, Osaka, Japan
- Corresponding author: Mikaël M. Martino, Martino Lab, Australian Regenerative Medicine Institute, 15 Innovation Walk, Level 1, Monash University, Victoria 3800, Australia;
| |
Collapse
|
12
|
Shanley LC, Mahon OR, Kelly DJ, Dunne A. Harnessing the innate and adaptive immune system for tissue repair and regeneration: Considering more than macrophages. Acta Biomater 2021; 133:208-221. [PMID: 33657453 DOI: 10.1016/j.actbio.2021.02.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/05/2021] [Accepted: 02/15/2021] [Indexed: 02/08/2023]
Abstract
Tissue healing and regeneration is a complex, choreographed, spatiotemporal process involving a plethora of cell types, the activity of which is stringently regulated in order for effective tissue repair to ensue post injury. A number of globally prevalent conditions such as heart disease, organ failure, and severe musculoskeletal disorders require new therapeutic strategies to repair damaged or diseased tissue, particularly given an ageing population in which obesity, diabetes, and consequent tissue defects have reached epidemic proportions. This is further compounded by the lack of intrinsic healing and poor regenerative capacity of certain adult tissues. While vast progress has been made in the last decade regarding tissue regenerative strategies to direct self-healing, for example, through implantation of tissue engineered scaffolds, several challenges have hampered the clinical application of these technologies. Control of the immune response is growing as an attractive approach in regenerative medicine and it is becoming increasingly apparent that an in depth understanding of the interplay between cells of the immune system and tissue specific progenitor cells is of paramount importance. Furthermore, the integration of immunology and bioengineering promises to elevate the efficacy of biomaterial-based tissue repair and regeneration. In this review, we highlight the role played by individual immune cell subsets in tissue repair processes and describe new approaches that are being taken to direct appropriate healing outcomes via biomaterial mediated targeting of immune cell activity. STATEMENT OF SIGNIFICANCE: It is becoming increasingly apparent that controlling the immune response is as an attractive approach in regenerative medicine. Here, we propose that an in-depth understanding of immune system and tissue specific progenitor cell interactions may reveal mechanisms by which tissue healing and regeneration takes place, in addition to identifying novel therapeutic targets that could be used to enhance the tissue repair process. To date, most reviews have focused solely on macrophage subsets. This manuscript details the role of other innate and adaptive immune cells such as innate lymphoid cells (ILCs), natural killer (NK) cells and γδT cells (in addition to macrophages) in tissue healing. We also describe new approaches that are being taken to direct appropriate healing outcomes via biomaterial mediated cytokine and drug delivery.
Collapse
|
13
|
Sadgrove NJ, Simmonds MSJ. Pharmacodynamics of Aloe vera and acemannan in therapeutic applications for skin, digestion, and immunomodulation. Phytother Res 2021; 35:6572-6584. [PMID: 34427371 DOI: 10.1002/ptr.7242] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 07/25/2021] [Accepted: 08/02/2021] [Indexed: 12/16/2022]
Abstract
Scientific studies of Aloe vera have tentatively explained therapeutic claims from a mechanistic perspective. Furthermore, in vitro outcomes demonstrate that the breakage of acemannan chains into smaller fragments enhances biological effects. These fragments can intravenously boost vaccine efficacy or entrain the immune system to attack cancer cells by mannose receptor agonism of macrophage or dendritic cells. With oral consumption, epithelialisation also occurs at injured sites in the small intestine or colon. The main advantage of dietary acemannan is the attenuation of the digestive process, increasing satiety, and slowing the release of sugars from starches. In the colon, acemannan is digested by microbes into short-chain fatty acids that are absorbed and augment the sensation of satiety and confer a host of other health benefits. In topical applications, an acemannan/chitosan combination accelerates the closure of wounds by promoting granular tissue formation, which creates a barrier between macrophages or neutrophils and the wound dressing. This causes M2 polarisation, reversal of inflammation, and acceleration of the re-epithelialisation process. This review summarises and explains the current pharmacodynamic paradigm in the context of acemannan in topical, oral, and intravenous applications. However, due to contradictory results in the literature, further research is required to provide scientific evidence to confirm or nullify these claims.
Collapse
|
14
|
Wildemann B, Ignatius A, Leung F, Taitsman LA, Smith RM, Pesántez R, Stoddart MJ, Richards RG, Jupiter JB. Non-union bone fractures. Nat Rev Dis Primers 2021; 7:57. [PMID: 34354083 DOI: 10.1038/s41572-021-00289-8] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/24/2021] [Indexed: 11/09/2022]
Abstract
The human skeleton has remarkable regenerative properties, being one of the few structures in the body that can heal by recreating its normal cellular composition, orientation and mechanical strength. When the healing process of a fractured bone fails owing to inadequate immobilization, failed surgical intervention, insufficient biological response or infection, the outcome after a prolonged period of no healing is defined as non-union. Non-union represents a chronic medical condition not only affecting function but also potentially impacting the individual's psychosocial and economic well-being. This Primer provides the reader with an in-depth understanding of our contemporary knowledge regarding the important features to be considered when faced with non-union. The normal mechanisms involved in bone healing and the factors that disrupt the normal signalling mechanisms are addressed. Epidemiological considerations and advances in the diagnosis and surgical therapy of non-union are highlighted and the need for greater efforts in basic, translational and clinical research are identified.
Collapse
Affiliation(s)
- Britt Wildemann
- Experimental Trauma Surgery, Department of Trauma, Hand and Reconstructive Surgery, Jena University Hospital, Friedrich Schiller University Jena, Jena, Germany. .,Julius Wolff Institute and BIH Center for Regenerative Therapies (BCRT), Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany.
| | - Anita Ignatius
- Institute of Orthopedic Research and Biomechanics, Ulm University, Ulm, Baden Württemberg, Germany
| | - Frankie Leung
- Department of Orthopaedics and Traumatology, Queen Mary Hospital, the University of Hong Kong, Hong Kong, Hong Kong
| | - Lisa A Taitsman
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, USA
| | - R Malcolm Smith
- Orthopedic trauma service, University of Massachusetts Medical School, Worcester, MA, USA
| | - Rodrigo Pesántez
- Departamento de Ortopedia Y Traumatología Fundación Santa Fé de Bogotá - Universidad de los Andes, Bogotá, Colombia
| | | | | | - Jesse B Jupiter
- Department of Orthopaedic surgery, Massachussets General Hospital, Boston, MA, USA.
| |
Collapse
|
15
|
Restoration of the healing microenvironment in diabetic wounds with matrix-binding IL-1 receptor antagonist. Commun Biol 2021; 4:422. [PMID: 33772102 PMCID: PMC7998035 DOI: 10.1038/s42003-021-01913-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 02/25/2021] [Indexed: 12/17/2022] Open
Abstract
Chronic wounds are a major clinical problem where wound closure is prevented by pathologic factors, including immune dysregulation. To design efficient immunotherapies, an understanding of the key molecular pathways by which immunity impairs wound healing is needed. Interleukin-1 (IL-1) plays a central role in regulating the immune response to tissue injury through IL-1 receptor (IL-1R1). Generating a knockout mouse model, we demonstrate that the IL-1-IL-1R1 axis delays wound closure in diabetic conditions. We used a protein engineering approach to deliver IL-1 receptor antagonist (IL-1Ra) in a localised and sustained manner through binding extracellular matrix components. We demonstrate that matrix-binding IL-1Ra improves wound healing in diabetic mice by re-establishing a pro-healing microenvironment characterised by lower levels of pro-inflammatory cells, cytokines and senescent fibroblasts, and higher levels of anti-inflammatory cytokines and growth factors. Engineered IL-1Ra has translational potential for chronic wounds and other inflammatory conditions where IL-1R1 signalling should be dampened.
Collapse
|