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Loeffler H, Waletzko-Hellwig J, Fischer RJ, Basen M, Frank M, Jonitz-Heincke A, Bader R, Klinder A. Systematic enhancement of microbial decontamination efficiency in bone graft processing by means of high hydrostatic pressure using Escherichia coli as a model organism. J Biomed Mater Res B Appl Biomater 2024; 112:e35383. [PMID: 38345152 DOI: 10.1002/jbm.b.35383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 10/30/2023] [Accepted: 01/27/2024] [Indexed: 02/15/2024]
Abstract
To obtain bone allografts that are safe for transplantation, several processing steps for decellularization and decontamination have to be applied. Currently available processing methods, although well-established, may interfere with the biomechanical properties of the bone. High hydrostatic pressure (HHP) is known to devitalize tissues effectively while leaving the extracellular matrix intact. However, little is known about the inactivation of the contaminating microorganisms by HHP. This study aims to investigate the ability of high-pressure decontamination and to establish a treatment protocol that is able to successfully inactivate microorganisms with the final goal to sterilize bone specimens. Using Escherichia coli (E. coli) as a model organism, HHP treatment parameters like temperature and duration, pressurization medium, and the number of treatment cycles were systematically adjusted to maximize the efficiency of inactivating logarithmic and stationary phase bacteria. Towards that we quantified colony-forming units (cfu) after treatment and investigated morphological changes via Field Emission Scanning Electron Microscopy (FESEM). Additionally, we tested the decontamination efficiency of HHP in bovine cancellous bone blocks that were contaminated with bacteria. Finally, two further model organisms were evaluated, namely Pseudomonas fluorescens as a Gram-negative microorganism and Micrococcus luteus as a Gram-positive representative. A HHP protocol, using 350 MPa, was able to sterilize a suspension of stationary phase E. coli, leading to a logarithmic reduction factor (log RF) of at least -7.99 (±0.43). The decontamination of bone blocks was less successful, indicating a protective effect of the surrounding tissue. Sterilization of 100% of the samples was achieved when a protocol optimized in terms of treatment temperature, duration, pressurization medium, and number and/or interval of cycles, respectively, was applied to bone blocks artificially contaminated with a suspension containing 104 cfu/mL. Hence, we here successfully established protocols for inactivating Gram-negative model microorganisms by HHP of up to 350 MPa, while pressure levels of 600 MPa were needed to inactivate the Gram-positive model organism. Thus, this study provides a basis for further investigations on different pathogenic bacteria that could enable the use of HHP in the decontamination of bone grafts intended for transplantation.
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Affiliation(s)
- Henrike Loeffler
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, Rostock University Medical Center, Rostock, Germany
| | - Janine Waletzko-Hellwig
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, Rostock University Medical Center, Rostock, Germany
| | - Ralf-Joerg Fischer
- Microbiology, Institute of Biological Sciences, University of Rostock, Rostock, Germany
| | - Mirko Basen
- Microbiology, Institute of Biological Sciences, University of Rostock, Rostock, Germany
- Department Maritime Systems, Faculty of Interdisciplinary Research, University of Rostock, Rostock, Germany
| | - Marcus Frank
- Medical Biology and Electron Microscopy Center, Rostock University Medical Center, Rostock, Germany
- Department Life, Light and Matter, Faculty for Interdisciplinary Research, University of Rostock, Rostock, Germany
| | - Anika Jonitz-Heincke
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, Rostock University Medical Center, Rostock, Germany
| | - Rainer Bader
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, Rostock University Medical Center, Rostock, Germany
| | - Annett Klinder
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, Rostock University Medical Center, Rostock, Germany
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Peng B, Du L, Zhang T, Chen J, Xu B. Research progress in decellularized extracellular matrix hydrogels for intervertebral disc degeneration. Biomater Sci 2023; 11:1981-1993. [PMID: 36734099 DOI: 10.1039/d2bm01862d] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
As one of the most common clinical disorders, low back pain (LBP) influences patient quality of life and causes substantial social and economic burdens. Many factors can result in LBP, the most common of which is intervertebral disc degeneration (IDD). The progression of IDD cannot be alleviated by conservative or surgical treatments, and gene therapy, growth factor therapy, and cell therapy have their own limitations. Recently, research on the use of hydrogel biomaterials for the treatment of IDD has garnered great interest, and satisfactory treatment results have been achieved. This article describes the classification of hydrogels, the methods of decellularized extracellular matrix (dECM) production and the various types of gel formation. The current research on dECM hydrogels for the treatment of IDD is described in detail in this article. First, an overview of the material sources, decellularization methods, and gel formation methods is given. The focus is on research performed over the last three years, which mainly consists of bovine and porcine NP tissues, while for decellularization methods, combinations of several approaches are primarily used. dECM hydrogels have significantly improved mechanical properties after the polymers are cross-linked. The main effects of these gels include induction of stem cell differentiation to intervertebral disc (IVD) cells, good mechanical properties to restore IVD height after polymer cross-linking, and slow release of exosomes. Finally, the challenges and problems still faced by dECM hydrogels for the treatment of IDD are summarised, and potential solutions are proposed. This paper is the first to summarise the research on dECM hydrogels for the treatment of IDD and aims to provide a theoretical reference for subsequent studies.
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Affiliation(s)
- Bing Peng
- Tianjin University of Traditional Chinese Medicine, No.10, Poyang Lake Road, Jinghai District, Tianjin, 301617, China
| | - Lilong Du
- Tianjin Hospital, Tianjin, No.406, Jiefang South Road, Hexi District, Tianjin, 301617, China.
| | - Tongxing Zhang
- Tianjin Hospital, Tianjin, No.406, Jiefang South Road, Hexi District, Tianjin, 301617, China.
| | - Jiangping Chen
- Liuyang Hospital of Traditional Chinese Medicine, Beizhengzhong Road, Hunan, 410399, China.
| | - Baoshan Xu
- Tianjin Hospital, Tianjin, No.406, Jiefang South Road, Hexi District, Tianjin, 301617, China.
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Kasravi M, Ahmadi A, Babajani A, Mazloomnejad R, Hatamnejad MR, Shariatzadeh S, Bahrami S, Niknejad H. Immunogenicity of decellularized extracellular matrix scaffolds: a bottleneck in tissue engineering and regenerative medicine. Biomater Res 2023; 27:10. [PMID: 36759929 PMCID: PMC9912640 DOI: 10.1186/s40824-023-00348-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 01/30/2023] [Indexed: 02/11/2023] Open
Abstract
Tissue-engineered decellularized extracellular matrix (ECM) scaffolds hold great potential to address the donor shortage as well as immunologic rejection attributed to cells in conventional tissue/organ transplantation. Decellularization, as the key process in manufacturing ECM scaffolds, removes immunogen cell materials and significantly alleviates the immunogenicity and biocompatibility of derived scaffolds. However, the application of these bioscaffolds still confronts major immunologic challenges. This review discusses the interplay between damage-associated molecular patterns (DAMPs) and antigens as the main inducers of innate and adaptive immunity to aid in manufacturing biocompatible grafts with desirable immunogenicity. It also appraises the impact of various decellularization methodologies (i.e., apoptosis-assisted techniques) on provoking immune responses that participate in rejecting allogenic and xenogeneic decellularized scaffolds. In addition, the key research findings regarding the contribution of ECM alterations, cytotoxicity issues, graft sourcing, and implantation site to the immunogenicity of decellularized tissues/organs are comprehensively considered. Finally, it discusses practical solutions to overcome immunogenicity, including antigen masking by crosslinking, sterilization optimization, and antigen removal techniques such as selective antigen removal and sequential antigen solubilization.
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Affiliation(s)
- Mohammadreza Kasravi
- grid.411600.2Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, 1985711151 Iran ,grid.411600.2Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Armin Ahmadi
- grid.411600.2Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, 1985711151 Iran
| | - Amirhesam Babajani
- grid.411600.2Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, 1985711151 Iran
| | - Radman Mazloomnejad
- grid.411600.2Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, 1985711151 Iran
| | - Mohammad Reza Hatamnejad
- grid.411600.2Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Siavash Shariatzadeh
- grid.19006.3e0000 0000 9632 6718Department of Surgery, University of California Los Angeles, Los Angeles, California USA
| | - Soheyl Bahrami
- grid.454388.60000 0004 6047 9906Ludwig Boltzmann Institute for Experimental and Clinical Traumatology in AUVA Research Center, Vienna, Austria
| | - Hassan Niknejad
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, 1985711151, Iran.
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Riess C, del Moral K, Fiebig A, Kaps P, Linke C, Hinz B, Rupprecht A, Frank M, Fiedler T, Koczan D, Troschke-Meurer S, Lode HN, Engel N, Freitag T, Classen CF, Maletzki C. Implementation of a combined CDK inhibition and arginine-deprivation approach to target arginine-auxotrophic glioblastoma multiforme cells. Cell Death Dis 2022; 13:555. [PMID: 35717443 PMCID: PMC9206658 DOI: 10.1038/s41419-022-05006-1] [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] [Received: 11/22/2021] [Revised: 05/18/2022] [Accepted: 06/08/2022] [Indexed: 01/21/2023]
Abstract
Constitutive activation of cyclin-dependent kinases (CDKs) or arginine auxotrophy are hallmarks of Glioblastoma multiforme (GBM). The latter metabolic defect renders tumor cells vulnerable to arginine-depleting substances, such as arginine deiminase from Streptococcus pyogenes (SpyADI). Previously, we confirmed the susceptibility of patient-derived GBM cells towards SpyADI as well as CDK inhibitors (CDKis). To improve therapeutic effects, we here applied a combined approach based on SpyADI and CDKis (dinaciclib, abemaciclib). Three arginine-auxotrophic patient-derived GBM lines with different molecular characteristics were cultured in 2D and 3D and effects of this combined SpyADI/CDKi approach were analyzed in-depth. All CDKi/SpyADI combinations yielded synergistic antitumoral effects, especially when given sequentially (SEQ), i.e., CDKi in first-line and most pronounced in the 3D models. SEQ application demonstrated impaired cell proliferation, invasiveness, and viability. Mitochondrial impairment was demonstrated by increasing mitochondrial membrane potential and decreasing oxygen consumption rate and extracellular acidification rate after SpyADI/abemaciclib monotherapy or its combination regimens. The combined treatment even induced autophagy in target cells (abemaciclib/SpyADI > dinaciclib/SpyADI). By contrast, the unfolded protein response and p53/p21 induced senescence played a minor role. Transmission electron microscopy confirmed damaged mitochondria and endoplasmic reticulum together with increased vacuolization under CDKi mono- and combination therapy. SEQ-abemaciclib/SpyADI treatment suppressed the DSB repair system via NHEJ and HR, whereas SEQ-dinaciclib/SpyADI treatment increased γ-H2AX accumulation and induced Rad51/Ku80. The latter combination also activated the stress sensor GADD45 and β-catenin antagonist AXIN2 and induced expression changes of genes involved in cellular/cytoskeletal integrity. This study highlights the strong antitumoral potential of a combined arginine deprivation and CDK inhibition approach via complex effects on mitochondrial dysfunction, invasiveness as well as DNA-damage response. This provides a good starting point for further in vitro and in vivo proof-of-concept studies to move forward with this strategy.
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Affiliation(s)
- Christin Riess
- grid.413108.f0000 0000 9737 0454University Children’s Hospital, Rostock University Medical Center, Ernst-Heydemann-Straße 8, 18057 Rostock, Germany ,grid.413108.f0000 0000 9737 0454Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057 Rostock, Germany
| | - Katharina del Moral
- grid.413108.f0000 0000 9737 0454University Children’s Hospital, Rostock University Medical Center, Ernst-Heydemann-Straße 8, 18057 Rostock, Germany
| | - Adina Fiebig
- grid.413108.f0000 0000 9737 0454Institute for Medical Microbiology, Virology, and Hygiene, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany
| | - Philipp Kaps
- grid.413108.f0000 0000 9737 0454University Children’s Hospital, Rostock University Medical Center, Ernst-Heydemann-Straße 8, 18057 Rostock, Germany ,grid.413108.f0000 0000 9737 0454Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057 Rostock, Germany ,grid.413108.f0000 0000 9737 0454Institute for Medical Microbiology, Virology, and Hygiene, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany
| | - Charlotte Linke
- grid.413108.f0000 0000 9737 0454University Children’s Hospital, Rostock University Medical Center, Ernst-Heydemann-Straße 8, 18057 Rostock, Germany
| | - Burkhard Hinz
- grid.413108.f0000 0000 9737 0454Institute for Pharmacology and Toxicology, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany
| | - Anne Rupprecht
- grid.413108.f0000 0000 9737 0454Institute for Pharmacology and Toxicology, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany
| | - Marcus Frank
- grid.413108.f0000 0000 9737 0454Medical Biology and Electron Microscopy Center, Rostock University Medical Center, Rostock, Germany ,grid.10493.3f0000000121858338Department of Life, Light & Matter, University of Rostock, Rostock, Germany
| | - Tomas Fiedler
- grid.413108.f0000 0000 9737 0454Institute for Medical Microbiology, Virology, and Hygiene, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany
| | - Dirk Koczan
- grid.10493.3f0000000121858338Institute for Immunology, University of Rostock, 18055 Rostock, Germany
| | - Sascha Troschke-Meurer
- grid.5603.0Department of Pediatric Oncology and Hematology, University Medicine Greifswald, Ferdinand-Sauerbruch-Strasse, 17475 Greifswald, Germany
| | - Holger N. Lode
- grid.5603.0Department of Pediatric Oncology and Hematology, University Medicine Greifswald, Ferdinand-Sauerbruch-Strasse, 17475 Greifswald, Germany
| | - Nadja Engel
- grid.413108.f0000 0000 9737 0454Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, Rostock University Medical Center, Rostock, Germany
| | - Thomas Freitag
- grid.413108.f0000 0000 9737 0454Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057 Rostock, Germany
| | - Carl Friedrich Classen
- grid.413108.f0000 0000 9737 0454University Children’s Hospital, Rostock University Medical Center, Ernst-Heydemann-Straße 8, 18057 Rostock, Germany
| | - Claudia Maletzki
- grid.413108.f0000 0000 9737 0454Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057 Rostock, Germany
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Naso F, Gandaglia A. Can Heart Valve Decellularization Be Standardized? A Review of the Parameters Used for the Quality Control of Decellularization Processes. Front Bioeng Biotechnol 2022; 10:830899. [PMID: 35252139 PMCID: PMC8891751 DOI: 10.3389/fbioe.2022.830899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/31/2022] [Indexed: 11/13/2022] Open
Abstract
When a tissue or an organ is considered, the attention inevitably falls on the complex and delicate mechanisms regulating the correct interaction of billions of cells that populate it. However, the most critical component for the functionality of specific tissue or organ is not the cell, but the cell-secreted three-dimensional structure known as the extracellular matrix (ECM). Without the presence of an adequate ECM, there would be no optimal support and stimuli for the cellular component to replicate, communicate and interact properly, thus compromising cell dynamics and behaviour and contributing to the loss of tissue-specific cellular phenotype and functions. The limitations of the current bioprosthetic implantable medical devices have led researchers to explore tissue engineering constructs, predominantly using animal tissues as a potentially unlimited source of materials. The high homology of the protein sequences that compose the mammalian ECM, can be exploited to convert a soft animal tissue into a human autologous functional and long-lasting prosthesis ensuring the viability of the cells and maintaining the proper biomechanical function. Decellularization has been shown to be a highly promising technique to generate tissue-specific ECM-derived products for multiple applications, although it might comprise very complex processes that involve the simultaneous use of chemical, biochemical, physical and enzymatic protocols. Several different approaches have been reported in the literature for the treatment of bone, cartilage, adipose, dermal, neural and cardiovascular tissues, as well as skeletal muscle, tendons and gastrointestinal tract matrices. However, most of these reports refer to experimental data. This paper reviews the most common and latest decellularization approaches that have been adopted in cardiovascular tissue engineering. The efficacy of cells removal was specifically reviewed and discussed, together with the parameters that could be used as quality control markers for the evaluation of the effectiveness of decellularization and tissue biocompatibility. The purpose was to provide a panel of parameters that can be shared and taken into consideration by the scientific community to achieve more efficient, comparable, and reliable experimental research results and a faster technology transfer to the market.
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Gholami K, Solhjoo S, Aghamir SMK. Application of Tissue-Specific Extracellular Matrix in Tissue Engineering: Focus on Male Fertility Preservation. Reprod Sci 2022; 29:3091-3099. [PMID: 35028926 DOI: 10.1007/s43032-021-00823-9] [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: 07/01/2021] [Accepted: 12/03/2021] [Indexed: 11/28/2022]
Abstract
In vitro spermatogenesis and xenotransplantation of the immature testicular tissues (ITT) are the experimental approaches that have been developed for creating seminiferous tubules-like functional structures in vitro and keeping the integrity of the ITTs in vivo, respectively. These strategies are rapidly developing in response to the growing prevalence of infertility in adolescent boys undergoing cancer treatment, by the logic that there is no sperm cryopreservation option for them. Recently, with the advances made in the field of tissue engineering and biomaterials, these methods have achieved promising results for fertility preservation. Due to the importance of extracellular matrix for the formation of vascular bed around the grafted ITTs and also the creation of spatial arrangements between Sertoli cells and germ cells, today it is clear that the scaffold plays a very important role in the success of these methods. Decellularized extracellular matrix (dECM) as a biocompatible, functionally graded, and biodegradable scaffold with having tissue-specific components and growth factors can support reorganization and physiologic processes of originated cells. This review discusses the common protocols for the tissue decellularization, sterilization, and hydrogel formation of the decellularized and lyophilized tissues as well as in vitro and in vivo studies on the use of the testis-derived dECM for testicular organoids.
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Affiliation(s)
- Keykavos Gholami
- Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Somayeh Solhjoo
- Department of Anatomy, Kerman University of Medical Sciences, Kerman, Iran
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Waletzko-Hellwig J, Pohl C, Riese J, Schlosser M, Dau M, Engel N, Springer A, Bader R. Effect of High Hydrostatic Pressure on Human Trabecular Bone Regarding Cell Death and Matrix Integrity. Front Bioeng Biotechnol 2021; 9:730266. [PMID: 34458245 PMCID: PMC8387795 DOI: 10.3389/fbioe.2021.730266] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 08/02/2021] [Indexed: 11/13/2022] Open
Abstract
The reconstruction of critical size bone defects is still clinically challenging. Even though the transplantation of autologous bone is used as gold standard, this therapy is accompanied by donor site morbidities as well as tissue limitations. The alternatively used allografts, which are devitalized due to thermal, chemical or physical processing, often lose their matrix integrity and have diminished biomechanical properties. High Hydrostatic Pressure (HHP) may represent a gentle alternative to already existing methods since HHP treated human osteoblasts undergo cell death and HHP treated bone cylinders maintain their mechanical properties. The aim of this study was to determine the biological effects caused by HHP treatment regarding protein/matrix integrity and type of cell death in trabecular bone cylinders. Therefore, different pressure protocols (250 and 300 MPa for 10, 20 and 30 min) and end point analysis such as quantification of DNA-fragmentation, gene expression, SDS-PAGE, FESEM analysis and histological staining were performed. While both protein and matrix integrity was preserved, molecular biological methods showed an apoptotic differentiation of cell death for lower pressures and shorter applications (250 MPa for 10 and 20 min) and necrotic differentiation for higher pressures and longer applications (300 MPa for 30 min). This study serves as a basis for further investigation as it shows that HHP successfully devitalizes trabecular bone cylinders.
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Affiliation(s)
- Janine Waletzko-Hellwig
- Department of Oral, Maxillofacial and Plastic Surgery, Rostock University Medical Center, Rostock, Germany
| | - Christopher Pohl
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, Greifswald, Germany
| | - Janik Riese
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, Greifswald, Germany
| | - Michael Schlosser
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, Greifswald, Germany
| | - Michael Dau
- Department of Oral, Maxillofacial and Plastic Surgery, Rostock University Medical Center, Rostock, Germany
| | - Nadja Engel
- Department of Oral, Maxillofacial and Plastic Surgery, Rostock University Medical Center, Rostock, Germany
| | - Armin Springer
- Medical Biology and Electron Microscopy Center, Rostock University Medical Center, Rostock, Germany
| | - Rainer Bader
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, Rostock University Medical Center, Rostock, Germany
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Emmert S, Pantermehl S, Foth A, Waletzko-Hellwig J, Hellwig G, Bader R, Illner S, Grabow N, Bekeschus S, Weltmann KD, Jung O, Boeckmann L. Combining Biocompatible and Biodegradable Scaffolds and Cold Atmospheric Plasma for Chronic Wound Regeneration. Int J Mol Sci 2021; 22:9199. [PMID: 34502107 PMCID: PMC8430875 DOI: 10.3390/ijms22179199] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/04/2021] [Accepted: 08/24/2021] [Indexed: 12/21/2022] Open
Abstract
Skin regeneration is a quite complex process. Epidermal differentiation alone takes about 30 days and is highly regulated. Wounds, especially chronic wounds, affect 2% to 3% of the elderly population and comprise a heterogeneous group of diseases. The prevailing reasons to develop skin wounds include venous and/or arterial circulatory disorders, diabetes, or constant pressure to the skin (decubitus). The hallmarks of modern wound treatment include debridement of dead tissue, disinfection, wound dressings that keep the wound moist but still allow air exchange, and compression bandages. Despite all these efforts there is still a huge treatment resistance and wounds will not heal. This calls for new and more efficient treatment options in combination with novel biocompatible skin scaffolds. Cold atmospheric pressure plasma (CAP) is such an innovative addition to the treatment armamentarium. In one CAP application, antimicrobial effects, wound acidification, enhanced microcirculations and cell stimulation can be achieved. It is evident that CAP treatment, in combination with novel bioengineered, biocompatible and biodegradable electrospun scaffolds, has the potential of fostering wound healing by promoting remodeling and epithelialization along such temporarily applied skin replacement scaffolds.
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Affiliation(s)
- Steffen Emmert
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (S.P.); (A.F.); (O.J.)
| | - Sven Pantermehl
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (S.P.); (A.F.); (O.J.)
| | - Aenne Foth
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (S.P.); (A.F.); (O.J.)
| | - Janine Waletzko-Hellwig
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Center Rostock, 18057 Rostock, Germany;
| | - Georg Hellwig
- Clinic and Policlinic for Orthopedics, University Medical Center Rostock, 18057 Rostock, Germany; (G.H.); (R.B.)
| | - Rainer Bader
- Clinic and Policlinic for Orthopedics, University Medical Center Rostock, 18057 Rostock, Germany; (G.H.); (R.B.)
| | - Sabine Illner
- Institute for Biomedical Engineering, University Medical Center Rostock, 18119 Rostock, Germany; (S.I.); (N.G.)
| | - Niels Grabow
- Institute for Biomedical Engineering, University Medical Center Rostock, 18119 Rostock, Germany; (S.I.); (N.G.)
| | - Sander Bekeschus
- ZIK Plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany; (S.B.); (K.-D.W.)
| | - Klaus-Dieter Weltmann
- ZIK Plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany; (S.B.); (K.-D.W.)
| | - Ole Jung
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (S.P.); (A.F.); (O.J.)
| | - Lars Boeckmann
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (S.P.); (A.F.); (O.J.)
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9
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Mechanical Characterization of Human Trabecular and Formed Granulate Bone Cylinders Processed by High Hydrostatic Pressure. MATERIALS 2021; 14:ma14051069. [PMID: 33668996 PMCID: PMC7956279 DOI: 10.3390/ma14051069] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/17/2021] [Accepted: 02/19/2021] [Indexed: 12/31/2022]
Abstract
One main disadvantage of commercially available allogenic bone substitute materials is the altered mechanical behavior due to applied material processing, including sterilization methods like thermal processing or gamma irradiation. The use of high hydrostatic pressure (HHP) might be a gentle alternative to avoid mechanical alteration. Therefore, we compressed ground trabecular human bone to granules and, afterwards, treated them with 250 and 300 MPa for 20 and 30 min respectively. We characterized the formed bone granule cylinders (BGC) with respect to their biomechanical properties by evaluating stiffness and stress at 15% strain. Furthermore, the stiffness and yield strength of HHP-treated and native human trabecular bone cylinders (TBC) as control were evaluated. The mechanical properties of native vs. HHP-treated TBCs as well as HHP-treated vs. untreated BGCs did not differ, independent of the applied HHP magnitude and duration. Our study suggests HHP treatment as a suitable alternative to current processing techniques for allogenic bone substitutes since no negative effects on mechanical properties occurred.
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Mendibil U, Ruiz-Hernandez R, Retegi-Carrion S, Garcia-Urquia N, Olalde-Graells B, Abarrategi A. Tissue-Specific Decellularization Methods: Rationale and Strategies to Achieve Regenerative Compounds. Int J Mol Sci 2020; 21:E5447. [PMID: 32751654 PMCID: PMC7432490 DOI: 10.3390/ijms21155447] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 07/25/2020] [Accepted: 07/28/2020] [Indexed: 02/07/2023] Open
Abstract
The extracellular matrix (ECM) is a complex network with multiple functions, including specific functions during tissue regeneration. Precisely, the properties of the ECM have been thoroughly used in tissue engineering and regenerative medicine research, aiming to restore the function of damaged or dysfunctional tissues. Tissue decellularization is gaining momentum as a technique to obtain potentially implantable decellularized extracellular matrix (dECM) with well-preserved key components. Interestingly, the tissue-specific dECM is becoming a feasible option to carry out regenerative medicine research, with multiple advantages compared to other approaches. This review provides an overview of the most common methods used to obtain the dECM and summarizes the strategies adopted to decellularize specific tissues, aiming to provide a helpful guide for future research development.
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Affiliation(s)
- Unai Mendibil
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain; (U.M.); (R.R.-H.); (S.R.-C.)
- TECNALIA, Basque Research and Technology Alliance (BRTA), 20009 Donostia-San Sebastian, Spain; (N.G.-U.); (B.O.-G.)
| | - Raquel Ruiz-Hernandez
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain; (U.M.); (R.R.-H.); (S.R.-C.)
| | - Sugoi Retegi-Carrion
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain; (U.M.); (R.R.-H.); (S.R.-C.)
| | - Nerea Garcia-Urquia
- TECNALIA, Basque Research and Technology Alliance (BRTA), 20009 Donostia-San Sebastian, Spain; (N.G.-U.); (B.O.-G.)
| | - Beatriz Olalde-Graells
- TECNALIA, Basque Research and Technology Alliance (BRTA), 20009 Donostia-San Sebastian, Spain; (N.G.-U.); (B.O.-G.)
| | - Ander Abarrategi
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain; (U.M.); (R.R.-H.); (S.R.-C.)
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
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