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Lee J, Park E, Lee K, Shin M, Lee S, Moreno-Villaécija MÁ, Lee H. Reversible tissue sticker inspired by chemistry in plant-pathogen relationship. Acta Biomater 2023; 155:247-257. [PMID: 36216125 DOI: 10.1016/j.actbio.2022.09.075] [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: 04/28/2022] [Revised: 09/26/2022] [Accepted: 09/29/2022] [Indexed: 02/02/2023]
Abstract
Plants release phenolic molecules to protect against invading pathogens. In plant-microorganism relationships, phenolics bind to surface oligosaccharides, inactivating microorganism activities. Inspired by phenol-saccharide interactions in plant defense systems, we designed an adhesive sealant. By screening 16 different saccharides, the O-acetyl group, rich in glucomannan (GM), exhibited rapid, robust binding with the galloyl moiety of a model phenolic molecule, tannic acid (TA). Furthermore, the interaction showed both pH and temperature (upper critical solution temperature) sensitivities. Utilizing O-acetyl-galloyl interactions, materials of all dimensions from beads (0D) to strings (1D), films (2D), and objects (3D) could be prepared, as a suitable platform for printing techniques. GMTA films are elastic, adhesive, water-resistant, and effectively sealed perforations, as demonstrated by (1) a lung incision followed by an air inflation model and (2) a thoracic diaphragm model. STATEMENT OF SIGNIFICANCE: In nature, phenolic molecules are 'nearly always' physically bound with polysaccharides, indicating that the phenolics widen the functions of polysaccharides. An example includes that phenolic-polysaccharide interactions are key defense mechanisms against microbial infection in plants whereas polysaccharide alone functions poorly. Despite the ubiquitous biochemistry of polysaccharide-phenolic interactions, efforts on understanding binding chemistry focusing on phenol/polysaccharide interactions is little. This study is important because we found for the first time that O-acetyl group is the moiety in polysaccharides to which phenolic cis-diol and/or cis-triol is spontaneously bound. The phenol-polysaccharide interaction is non-covalent yet robust, kinetically fast, and reversible. Inspired by the interaction chemistry, a simple mixture of phenolic molecules and O-acetyl group containing polysaccharides such as glucomannan opens a promising fabrication strategy toward functional polysaccharide-based material.
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Affiliation(s)
- Jeehee Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Eunsook Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Kyueui Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41666, Republic of Korea
| | - Mikyung Shin
- Department of Biomedical Engineering, Sungkyunkwan University (SKKU) Suwon 16419, Republic of Korea; Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Soohyeon Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Miguel Ángel Moreno-Villaécija
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona 08193, Spain
| | - Haeshin Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
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2
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Abstract
Technological innovations in cellular and molecular aspects of tissue engineering --scaffolds, stem cells and 3D printed tissues --have been dramatically increased in the last decade. However, regenerative treatment still has challenges in translation to clinic. This is partly due to failure of addressing an essential element of wound healing, inflammation. It is now well-recognized that inflammation is an active process. This paradigm shift opened up a new avenue of therapeutic approaches called "host-modulation." Host-modulation therapies capable of modulating inflammatory response at multiple levels and mimicking the natural sequence of wound healing offer a new direction and promising clinical translation.
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3
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Aubeux D, Peters OA, Hosseinpour S, Tessier S, Geoffroy V, Pérez F, Gaudin A. Specialized pro-resolving lipid mediators in endodontics: a narrative review. BMC Oral Health 2021; 21:276. [PMID: 34030680 PMCID: PMC8142493 DOI: 10.1186/s12903-021-01619-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 05/09/2021] [Indexed: 02/06/2023] Open
Abstract
Endodontics is the branch of dentistry concerned with the morphology, physiology, and pathology of the human dental pulp and periradicular tissues. Human dental pulp is a highly dynamic tissue equipped with a network of resident immunocompetent cells that play major roles in the defense against pathogens and during tissue injury. However, the efficiency of these mechanisms during dental pulp inflammation (pulpitis) varies due to anatomical and physiological restrictions. Uncontrolled, excessive, or unresolved inflammation can lead to pulp tissue necrosis and subsequent bone infections called apical periodontitis. In most cases, pulpitis treatment consists of total pulp removal. Although this strategy has a good success rate, this treatment has some drawbacks (lack of defense mechanisms, loss of healing capacities, incomplete formation of the root in young patients). In a sizeable number of clinical situations, the decision to perform pulp extirpation and endodontic treatment is justifiable by the lack of therapeutic tools that could otherwise limit the immune/inflammatory process. In the past few decades, many studies have demonstrated that the resolution of acute inflammation is necessary to avoid the development of chronic inflammation and to promote repair or regeneration. This active process is orchestrated by Specialized Pro-resolving lipid Mediators (SPMs), including lipoxins, resolvins, protectins and maresins. Interestingly, SPMs do not have direct anti-inflammatory effects by inhibiting or directly blocking this process but can actively reduce neutrophil infiltration into inflamed tissues, enhance efferocytosis and bacterial phagocytosis by monocytes and macrophages and simultaneously inhibit inflammatory cytokine production. Experimental clinical application of SPMs has shown promising result in a wide range of inflammatory diseases, such as renal fibrosis, cerebral ischemia, marginal periodontitis, and cancer; the potential of SPMs in endodontic therapy has recently been explored. In this review, our objective was to analyze the involvement and potential use of SPMs in endodontic therapies with an emphasis on SPM delivery systems to effectively administer SPMs into the dental pulp space.
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Affiliation(s)
- Davy Aubeux
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, 44042, Nantes, France
- Université de Nantes, UFR Odontologie, 44042, Nantes, France
| | - Ove A Peters
- School of Dentistry, The University of Queensland, Brisbane, Australia
| | | | - Solène Tessier
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, 44042, Nantes, France
- Université de Nantes, UFR Odontologie, 44042, Nantes, France
| | - Valérie Geoffroy
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, 44042, Nantes, France
- Université de Nantes, UFR Odontologie, 44042, Nantes, France
| | - Fabienne Pérez
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, 44042, Nantes, France
- Université de Nantes, UFR Odontologie, 44042, Nantes, France
- CHU Nantes, PHU4 OTONN44093, Nantes, France
| | - Alexis Gaudin
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, 44042, Nantes, France.
- Université de Nantes, UFR Odontologie, 44042, Nantes, France.
- CHU Nantes, PHU4 OTONN44093, Nantes, France.
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4
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McBride DA, Kerr MD, Dorn NC, Ogbonna DA, Santos EC, Shah NJ. Triggers, Timescales, and Treatments for Cytokine-Mediated Tissue Damage. ACTA ACUST UNITED AC 2020; 5:52-62. [PMID: 34013158 DOI: 10.33590/emjinnov/20-00203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Inflammation is an essential cytokine-mediated process for generating a neutralizing immune response against pathogens and is generally protective. However, aberrant or excessive production of pro-inflammatory cytokines is associated with uncontrolled local and systemic inflammation, resulting in cell death and often irreversible tissue damage. Uncontrolled inflammation can manifest over timescales spanning hours to years and is primarily dependent on the triggering event. Rapid and potentially lethal increase in cytokine production, or a 'cytokine storm,' develops in hours to days and is associated with cancer cell-based immunotherapies, such as CAR-T cell therapy. On the other hand, some bacterial and viral infections with high microbial replication or highly potent antigens elicit immune responses that result in supraphysiological systemic cytokine concentrations which manifest over days to weeks. Immune dysregulation in autoimmune diseases can lead to chronic cytokine-mediated tissue damage spanning months to years, which often occurs episodically. While the initiating events and cellular participants may differ in these disease processes, many of the cytokines that drive disease progression are shared. For example, upregulation of IL-1, IL-6, IFN-γ, TNF, and GM-CSF frequently coincides with cytokine storm, sepsis, and autoimmune disease. Targeted inhibition of these pro-inflammatory molecules via antagonist monoclonal antibodies has improved clinical outcomes, but the complexity of the underlying immune dysregulation results in high variability. Rather than a "one size fits all" treatment approach, an identification of disease endotypes may permit the development of effective therapeutic strategies that address the contributors of disease progression. Here, we present a literature review of the cytokine-associated etiology of acute and chronic cytokine-mediated tissue damage, describe successes and challenges in developing clinical treatments, and highlight advancements in preclinical therapeutic strategies for mitigating pathological cytokine production.
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Affiliation(s)
- David A McBride
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA.,Chemical Engineering Program, University of California, San Diego, La Jolla, CA 92093, USA.,Center for Nano-Immuno Engineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Matthew D Kerr
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA.,Chemical Engineering Program, University of California, San Diego, La Jolla, CA 92093, USA.,Center for Nano-Immuno Engineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Nicholas C Dorn
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA.,Chemical Engineering Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Dora A Ogbonna
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA.,Chemical Engineering Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Evan C Santos
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA.,Chemical Engineering Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Nisarg J Shah
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA.,Chemical Engineering Program, University of California, San Diego, La Jolla, CA 92093, USA.,Center for Nano-Immuno Engineering, University of California, San Diego, La Jolla, CA 92093, USA.,Program in Immunology, University of California, San Diego, La Jolla, CA 92093, USA.,San Diego Center for Precision Immunotherapy, Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
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5
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An Evidence-Based Update on the Molecular Mechanisms Underlying Periodontal Diseases. Int J Mol Sci 2020; 21:ijms21113829. [PMID: 32481582 PMCID: PMC7312805 DOI: 10.3390/ijms21113829] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/22/2020] [Accepted: 05/25/2020] [Indexed: 12/15/2022] Open
Abstract
Several investigators have reported about the intricate molecular mechanism underlying periodontal diseases (PD). Nevertheless, the role of specific genes, cells, or cellular mechanisms involved in the pathogenesis of periodontitis are still unclear. Although periodontitis is one of the most prevalent oral diseases globally, there are no pre-diagnostic markers or therapeutic targets available for such inflammatory lesions. A pivotal role is played by pro- and anti-inflammatory markers in modulating pathophysiological and physiological processes in repairing damaged tissues. In addition, effects on osteoimmunology is ever evolving due to the ongoing research in understanding the molecular mechanism lying beneath periodontal diseases. The aim of the current review is to deliver an evidence-based update on the molecular mechanism of periodontitis with a particular focus on recent developments. Reports regarding the molecular mechanism of these diseases have revealed unforeseen results indicative of the fact that significant advances have been made to the periodontal medicine over the past decade. There is integrated hypothesis-driven research going on. Although a wide picture of association of periodontal diseases with immune response has been further clarified with present ongoing research, small parts of the puzzle remain a mystery and require further investigations.
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6
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Van Dyke TE, Sima C. Understanding resolution of inflammation in periodontal diseases: Is chronic inflammatory periodontitis a failure to resolve? Periodontol 2000 2020; 82:205-213. [PMID: 31850636 DOI: 10.1111/prd.12317] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Periodontitis is an infectious-inflammatory disease that results from loss of balance between the commensal microbiome and the host response. The hyper-inflammatory, uncontrolled inflammatory immune lesion promotes tissue damage and impedes effective bacterial clearance. In this review, the relationship between the microbiome and the inflammatory/immune response is explored in the context of a bi-directional pathogenesis; bacteria induce inflammation and inflammation modifies the growth environment causing shifts in the composition of the microbiome. Resolution of inflammation is an active, receptor-mediated process induced by specialized pro-resolving lipid mediators. Inflammatory disease may, therefore, be the result of failure of resolution. Failure to resolve inflammation coupled with resultant microbiome changes is hypothesized to drive development of periodontitis. Re-establishment of microbiome/host homeostasis by specialized pro-resolving lipid mediator therapy suggests that microbiome dysbiosis, the host hyperinflammatory phenotype, and periodontitis can be reversed.
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Affiliation(s)
- Thomas E Van Dyke
- Forsyth Institute, Cambridge, Massachusetts, USA.,Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Corneliu Sima
- Harvard School of Dental Medicine, Boston, Massachusetts, USA
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7
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Park E, Lee J, Huh KM, Lee SH, Lee H. Toxicity-Attenuated Glycol Chitosan Adhesive Inspired by Mussel Adhesion Mechanisms. Adv Healthc Mater 2019; 8:e1900275. [PMID: 31091015 DOI: 10.1002/adhm.201900275] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/25/2019] [Indexed: 01/04/2023]
Abstract
Chitosan-catechol, inspired from mussel-adhesive-proteins, is characterized by the formation of an adhesive membrane complex through instant bonding with serum proteins not found in chitosan. Using this intrinsic property, chitosan-catechol is widely applied for hemostatic needles, general hemostatic materials, nanoparticle composites, and 3D printing. Despite its versatility, the practical use of chitosan-catechol in the clinic is limited due to its undesired immune responses. Herein, a catechol-conjugated glycol chitosan is proposed as an alternative hemostatic hydrogel with negligible immune responses enabling the replacement of chitosan-catechol. Comparative cellular toxicity and in vivo skin irritation between chitosan-catechol and glycol chitosan-catechol are evaluated. Their immune responses are also assessed using histological analysis after subcutaneous implantation into mice. The results show that glycol chitosan-catechol significantly attenuates the immune response compared with chitosan-catechol; this finding is likely due to the antibiofouling effect of ethylene glycol groups and the reduced adhesion of immune cells. Finally, the tissue adhesion and hemostatic ability of glycol chitosan-catechol hydrogels reveal that these ethylene glycol groups do not dramatically modify the adhesiveness and hemostatic ability compared with nonglycol chitosan-catechol. This study suggests that glycol chitosan-catechol can be a promising alternative to chitosan-catechol in various biomedical fields such as hemostatic agents.
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Affiliation(s)
- Eunsook Park
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) 291 University Rd Yuseong‐gu Daejeon 34141 Republic of Korea
| | - Jeehee Lee
- Biomedical Science and Engineering Interdisciplinary ProgramKorea Advanced Institute of Science and Technology (KAIST) 291 University Rd Yuseong‐gu Daejeon 34141 Republic of Korea
| | - Kang Moo Huh
- Department of Polymer Science and EngineeringChungnam National University 99 University Rd Yuseong‐gu Daejeon 34134 Republic of Korea
| | - Soo Hyeon Lee
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) 291 University Rd Yuseong‐gu Daejeon 34141 Republic of Korea
| | - Haeshin Lee
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) 291 University Rd Yuseong‐gu Daejeon 34141 Republic of Korea
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8
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Nikolajczyk BS, Dawson DR. Origin of Th17 Cells in Type 2 Diabetes-Potentiated Periodontal Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1197:45-54. [DOI: 10.1007/978-3-030-28524-1_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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9
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Lumelsky N, O'Hayre M, Chander P, Shum L, Somerman MJ. Autotherapies: Enhancing Endogenous Healing and Regeneration. Trends Mol Med 2018; 24:919-930. [PMID: 30213702 DOI: 10.1016/j.molmed.2018.08.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 08/09/2018] [Accepted: 08/17/2018] [Indexed: 12/31/2022]
Abstract
The promise of tissue engineering and regenerative medicine to reduce the burden of disease and improve quality of life are widely acknowledged. Traditional tissue engineering and regenerative medicine approaches rely on generation of tissue constructs in vitro for subsequent transplantation or injection of exogenously manipulated cells into a host. While promising, few such therapies have succeeded in clinical practice. Here, we propose that recent advances in stem cell and developmental biology, immunology, bioengineering, and material sciences, position us to develop a new generation of in vivo regenerative medicine therapies, which we term autotherapies. Autotherapies are strategies based on optimizing endogenous tissue responses and capitalizing on manipulation of stem cell niches and endogenous tissue microenvironments to enhance tissue healing and regeneration.
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Affiliation(s)
- Nadya Lumelsky
- National Institute of Dental and Craniofacial Research, National Institutes of Health, 6701 Democracy Blvd., Bethesda, MD 20892-4878, USA.
| | - Morgan O'Hayre
- National Institute of Dental and Craniofacial Research, National Institutes of Health, 6701 Democracy Blvd., Bethesda, MD 20892-4878, USA
| | - Preethi Chander
- National Institute of Dental and Craniofacial Research, National Institutes of Health, 6701 Democracy Blvd., Bethesda, MD 20892-4878, USA
| | - Lillian Shum
- National Institute of Dental and Craniofacial Research, National Institutes of Health, 6701 Democracy Blvd., Bethesda, MD 20892-4878, USA
| | - Martha J Somerman
- National Institute of Dental and Craniofacial Research, National Institutes of Health, 6701 Democracy Blvd., Bethesda, MD 20892-4878, USA
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10
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Carfì Pavia F, Conoscenti G, Greco S, La Carrubba V, Ghersi G, Brucato V. Preparation, characterization and in vitro test of composites poly-lactic acid/hydroxyapatite scaffolds for bone tissue engineering. Int J Biol Macromol 2018; 119:945-953. [PMID: 30081128 DOI: 10.1016/j.ijbiomac.2018.08.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 07/25/2018] [Accepted: 08/02/2018] [Indexed: 12/13/2022]
Abstract
In this work, the possibility to produce composite Poly-L-lactic acid (PLLA)/Hydroxyapatite (HA) porous scaffolds via Thermally Induced Phase Separation (TIPS) for bone tissue engineering applications was investigated. Several PLLA/HA wt/wt ratios (95/5, 90/10, 70/30, 50/50, 34/66) were tested and the as-obtained scaffolds were characterized via Scanning Electron Microscopy, Wide Angle X-Ray Diffraction, Thermogravimetric analysis, Gas Pycnometry, Differential Scanning Calorimetry and mechanical compression test. Morphological analysis revealed an open structure with interconnected pores and HA particles embedded in the polymer matrix. Finally, cell cultures were carried out into the composite scaffolds in order to evaluate the effect of HA on the proliferation and differentiation of osteoblastic cells, showing a higher alkaline phosphatase activity on composite scaffolds compared to neat PLLA ones.
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Affiliation(s)
- Francesco Carfì Pavia
- DICAM, University of Palermo, Viale delle Scienze building 8, 90128 Palermo, Italy; ATeN center, University of Palermo, Viale delle Scienze building 18A, 90128 Palermo, Italy.
| | | | - Silvia Greco
- DICAM, University of Palermo, Viale delle Scienze building 8, 90128 Palermo, Italy
| | - Vincenzo La Carrubba
- DICAM, University of Palermo, Viale delle Scienze building 8, 90128 Palermo, Italy; ATeN center, University of Palermo, Viale delle Scienze building 18A, 90128 Palermo, Italy
| | - Giulio Ghersi
- STEBICEF, University of Palermo, Viale delle Scienze building 16, 90128 Palermo, Italy
| | - Valerio Brucato
- DICAM, University of Palermo, Viale delle Scienze building 8, 90128 Palermo, Italy; ATeN center, University of Palermo, Viale delle Scienze building 18A, 90128 Palermo, Italy
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11
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Maglione M, Spano S, Ruaro ME, Salvador E, Zanconati F, Tromba G, Turco G. In vivo evaluation of chitosan-glycerol gel scaffolds seeded with stem cells for full-thickness mandibular bone regeneration. J Oral Sci 2018. [PMID: 28637982 DOI: 10.2334/josnusd.16-0235] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The aim of this study was to evaluate in vivo bone regeneration, mediated by adipose-derived stem cells (ADSCs), induced to differentiate into osteoblasts and carried by a scaffold gel. In the test group, bone regeneration was mediated by ADSCs, induced to differentiate into osteoblasts, and carried by a scaffold gel. In the control group a scaffold without cells was used. The scaffold, consisting of chitosan and glycerol phosphate, was maintained in situ by a cross-linked resorbable membrane. The osteogenic potential of ADSCs was confirmed by osteocalcin assay and Von Kossa staining performed before implantation. Histological assays detected an initial increase in bone formation in the test group compared with the control group. Microcomputed tomography analysis did not show significant differences between the two groups. Both histological and microcomputed tomography analysis were performed on the ex vivo specimens after a follow-up period of 8 weeks. We observed that differentiated ADSCs could increase bone regeneration and that the scaffold used here can be a suitable carrier to entrap and maintain the cells in situ. On the contrary, the membrane used was not functional in isolating the site of the defect from surrounding soft tissues and caused a significant inflammatory reaction.
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Affiliation(s)
| | - Serena Spano
- Department of Medical Sciences, University of Trieste
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12
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13
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Van Dyke TE. Pro-resolving mediators in the regulation of periodontal disease. Mol Aspects Med 2017; 58:21-36. [PMID: 28483532 DOI: 10.1016/j.mam.2017.04.006] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/11/2017] [Accepted: 04/12/2017] [Indexed: 01/07/2023]
Abstract
Periodontitis is an inflammatory disease of the supporting structures of the dentition that is initiated by bacteria that form a biofilm on the surface of the teeth. The pathogenesis of the disease is a result of complex interactions between the biofilm and the host response that results in dysbiosis of the microbiome and dysregulation of the inflammatory response. Current data suggest that the excess inflammation associated with periodontitis is due to a failure of resolution of inflammation pathways. In this review, the relationship between inflammation and microbial dysbiosis is examined in the context of pro-inflammation and pro-resolution mediators and their ability to modify the course of disease. The impact of local oral inflammation on systemic inflammation and the relationship of periodontitis to other inflammatory diseases, including type 2 diabetes and cardiovascular disease is reviewed. Active resolvers of inflammation, including the lipoxins and resolvins, show great promise as therapeutics for the treatment of periodontitis and other inflammatory diseases.
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14
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Thomas RC, Vu P, Modi SP, Chung PE, Landis RC, Khaing ZZ, Hardy JG, Schmidt CE. Sacrificial Crystal Templated Hyaluronic Acid Hydrogels As Biomimetic 3D Tissue Scaffolds for Nerve Tissue Regeneration. ACS Biomater Sci Eng 2017; 3:1451-1459. [DOI: 10.1021/acsbiomaterials.7b00002] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Richelle C. Thomas
- J. Crayton
Pruitt Department of Biomedical Engineering, The University of Florida, Gainesville, Florida 32611, United States
| | - Philip Vu
- J. Crayton
Pruitt Department of Biomedical Engineering, The University of Florida, Gainesville, Florida 32611, United States
| | | | | | - R. Clive Landis
- Department
of Chronic Disease Research Centre, Faculty of Medicine, Cave Hill
Campus, The University of the West Indies, Wanstead, Barbados
| | - Zin. Z. Khaing
- J. Crayton
Pruitt Department of Biomedical Engineering, The University of Florida, Gainesville, Florida 32611, United States
| | - John G. Hardy
- J. Crayton
Pruitt Department of Biomedical Engineering, The University of Florida, Gainesville, Florida 32611, United States
| | - Christine E. Schmidt
- J. Crayton
Pruitt Department of Biomedical Engineering, The University of Florida, Gainesville, Florida 32611, United States
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15
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Van Dyke TE, Hasturk H, Kantarci A, Freire MO, Nguyen D, Dalli J, Serhan CN. Proresolving nanomedicines activate bone regeneration in periodontitis. J Dent Res 2014; 94:148-56. [PMID: 25389003 DOI: 10.1177/0022034514557331] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Therapies to reverse tissue damage from osteolytic inflammatory diseases are limited by the inability of current tissue-engineering procedures to restore lost hard and soft tissues. There is a critical need for new therapeutics in regeneration. In addition to scaffolds, cells, and soluble mediators necessary for tissue engineering, control of endogenous inflammation is an absolute requirement for success. Although significant progress has been made in understanding natural resolution of inflammation pathways to limit uncontrolled inflammation in disease, harnessing the biomimetic properties of proresolving lipid mediators has not been demonstrated. Here, we report the use of nano-proresolving medicines (NPRM) containing a novel lipoxin analog (benzo-lipoxin A4, bLXA4) to promote regeneration of hard and soft tissues irreversibly lost to periodontitis in the Hanford miniature pig. In this proof-of-principle experiment, NPRM-bLXA4 dramatically reduced inflammatory cell infiltrate into chronic periodontal disease sites treated surgically and dramatically increased new bone formation and regeneration of the periodontal organ. These findings indicate that NPRM-bLXA4 is a mimetic of endogenous resolving mechanisms with potent bioactions that offers a new therapeutic tissue-engineering approach for the treatment of chronic osteolytic inflammatory diseases.
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Affiliation(s)
- T E Van Dyke
- Center for Periodontology, Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
| | - H Hasturk
- Center for Periodontology, Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
| | - A Kantarci
- Center for Periodontology, Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
| | - M O Freire
- Center for Periodontology, Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
| | - D Nguyen
- Center for Periodontology, Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
| | - J Dalli
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - C N Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
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Amini AA, Nair LS. Recombinant human lactoferrin as a biomaterial for bone tissue engineering: mechanism of antiapoptotic and osteogenic activity. Adv Healthc Mater 2014; 3:897-905. [PMID: 24352833 PMCID: PMC4053819 DOI: 10.1002/adhm.201300496] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 10/24/2013] [Indexed: 01/02/2023]
Abstract
Lactoferrin is a bioactive globular protein with unique properties towards musculo-skeletal cells and anabolic to bone in vivo. Even though the potent anti-apoptotic and osteogenic activity of lactoferrin has been reported, the mechanism of action has not been fully elucidated. The study demonstrates that the anti-apoptotic effect of rhLF towards MC3T3 pre-osteoblast cells is mediated by Wnt5a/PKA pathway and the stabilization of β-catenin by rhLF is dependent on PKA/LRP6 signaling pathway. The study also investigates the feasibility of developing rhLF as a biomaterial for cell delivery. The injectable rhLF cell delivery vehicles are prepared by enzymatic crosslinking of tyramine-modified rhLF in the presence of hydrogen peroxide and horseradish peroxidase. The modified rhLF shows bioactivity similar to unmodified rhLF. The rhLF gels support encapsulated MC3T3 cell viability, proliferation, and differentiation, as well as phosphorylation of signaling proteins. In conclusion, the study demonstrates the involvement of Wnt5a, LRP6, and PKA signaling in rhLF-mediated bioactivity towards MC3T3 cells and the feasibility of developing an injectable cell delivery vehicle from rhLF.
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Affiliation(s)
- Ashley A. Amini
- School of Dental Medicine, University of Connecticut Health Center, Farmington, Connecticut – 06030
| | - Lakshmi S. Nair
- Department of Orthopeadic Surgery, Institute for Regenerative Engineering, Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, Connecticut – 06030
- Department of Chemical, Materials and Biomolecular Engineering, Biomedical Engineering, Institute of Material Science, University of Connecticut, Storrs, Connecticut – 06269
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17
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Rhett JM, Fann SA, Yost MJ. Purinergic signaling in early inflammatory events of the foreign body response: modulating extracellular ATP as an enabling technology for engineered implants and tissues. TISSUE ENGINEERING PART B-REVIEWS 2014; 20:392-402. [PMID: 24279914 DOI: 10.1089/ten.teb.2013.0554] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Purinergic signaling is a ubiquitous and vital aspect of mammalian biology in which purines--mainly adenosine triphosphate (ATP)--are released from cells through loss of membrane integrity (cell death), exocytosis, or transport/diffusion across membrane channels, and exert paracrine or autocrine signaling effects through three subclasses of well-characterized receptors: the P1 adenosine receptors, the P2X ionotropic nucleotide receptors, and the P2Y metabotropic receptors. ATP and its metabolites are released by damaged and stressed cells in injured tissues. The early events of wound healing, hemostasis, and inflammation are highly regulated by these signals through activation of purinergic receptors on platelets and neutrophils. Recent data have demonstrated that ATP signaling is of particular importance to targeting leukocytes to sites of injury. This is particularly relevant to the subject of implanted medical devices, engineered tissues, and grafts as all these technologies elicit a wound healing response with varying degrees of encapsulation, rejection, extrusion, or destruction of the tissue or device. Here, we review the biology of purinergic signaling and focus on ATP release and response mechanisms that pertain to the early inflammatory phase of wound healing. Finally, therapeutic options are explored, including a new class of peptidomimetic drugs based on the ATP-conductive channel connexin43.
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Affiliation(s)
- J Matthew Rhett
- Division of General Surgery, Department of Surgery, Medical University of South Carolina , Charleston, South Carolina
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18
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Moreno-Sanz C, Manzanera-Díaz M, Cortina-Oliva FJ, de Pedro-Conal J, Clerveus M, Picazo-Yeste J. Pelvic reconstruction after abdominoperineal resection: a pilot study using an absorbable synthetic prosthesis. Tech Coloproctol 2011; 15:455-9. [PMID: 21960412 DOI: 10.1007/s10151-011-0763-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 09/09/2011] [Indexed: 01/13/2023]
Abstract
BACKGROUND Abdominoperineal resection (APR) is not free of complications, in particular complications due to the occupation of the pelvis by the small bowel after surgery. A number of surgical techniques have been described to prevent the small bowel from entering and adhering to the pelvis (pelvic partition), but there is no agreement concerning their use. The aim of this study was to evaluate the feasibility, effectiveness and safety of using an absorbable synthetic prosthetic material for pelvic partitioning after APR. METHODS A prospective non-randomised longitudinal pilot study was carried out on a series of 10 patients who underwent APR due to lower-third rectal cancer, in order to evaluate the feasibility, safety and efficacy of pelvic partitioning with an absorbable synthetic prosthetic material. RESULTS In all the patients, it was possible to perform a radical resection and to install the prosthesis. After a mean follow-up of 9 months (range: 4-18 months), no abdominal or perineal complications were detected. One patient (10%) suffered chronic pelvic pain. CONCLUSIONS Pelvic partition after APR of the rectum with an absorbable synthetic prosthesis is feasible, effective and safe.
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Affiliation(s)
- C Moreno-Sanz
- Department of Surgery, La Mancha Centro General Hospital, Avenida de la Constitución, s/n, 13600 Alcazar de San Juan, Ciudad Real, Spain.
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19
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Thevenot PT, Baker DW, Weng H, Sun MW, Tang L. The pivotal role of fibrocytes and mast cells in mediating fibrotic reactions to biomaterials. Biomaterials 2011; 32:8394-403. [PMID: 21864899 DOI: 10.1016/j.biomaterials.2011.07.084] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Accepted: 07/29/2011] [Indexed: 12/18/2022]
Abstract
Almost all biomaterial implants are surrounded by a fibrotic capsule, although the mechanism of biomaterial-mediated fibrotic reactions is mostly unclear. To search for the types of cells responsible for triggering the tissue responses, we used poly-L glycolic acid polymers capable of releasing various reagents. We first identified that CD45(+)/Collagen 1(+) fibrocytes are recruited and resided within the fibrotic capsule at the implant interface. Interestingly, we found that the recruitment of fibrocytes and the extent of fibrotic tissue formation (collagen type I production) were substantially enhanced and reduced by the localized release of compound 48/80 and cromolyn, respectively. Since it is well established that compound 48/80 and cromolyn alter mast cell reactions, we hypothesized that mast cells are responsible for triggering fibrocyte recruitment and subsequent fibrotic capsule formation surrounding biomaterial implants. To directly test this hypothesis, similar studies were carried out using mast cell deficient mice, WBB6F1/J-Kit(W)/Kit(W-v)/, and their congenic controls. Indeed, mast cell deficient mice prompted substantially less fibrocyte and myofibroblast responses in comparison to C57 wild type mice controls. Most interestingly, subcutaneous mast cell reconstitution of WBB6F1/J-Kit(W)/Kit(W-v)/J mice almost completely restored the fibrocyte response in comparison to the C57 wild type response. These results indicate that the initial biomaterial interaction resulting in the stimulation of mast cells and degranulation byproducts not only stimulates the inflammatory cascade but significantly alters the downstream fibrocyte response and degree of fibrosis.
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Affiliation(s)
- Paul T Thevenot
- Bioengineering Department, University of Texas Southwestern Medical Center at Dallas, TX, USA
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20
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Ji Y, Christopherson GT, Kluk MW, Amrani O, Jackson WM, Nesti LJ. Heterotopic Ossification Following Musculoskeletal Trauma: Modeling Stem and Progenitor Cells in Their Microenvironment. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 720:39-50. [DOI: 10.1007/978-1-4614-0254-1_4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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21
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Atala A, Irvine DJ, Moses M, Shaunak S. Wound Healing Versus Regeneration: Role of the Tissue Environment in Regenerative Medicine. MRS BULLETIN 2010; 35:10.1557/mrs2010.528. [PMID: 24241586 PMCID: PMC3826556 DOI: 10.1557/mrs2010.528] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
One of the major challenges in the field of regenerative medicine is how to optimize tissue regeneration in the body by therapeutically manipulating its natural ability to form scar at the time of injury or disease. It is often the balance between tissue regeneration, a process that is activated at the onset of disease, and scar formation, which develops as a result of the disease process that determines the ability of the tissue or organ to be functional. Using biomaterials as scaffolds often can provide a "bridge" for normal tissue edges to regenerate over small distances, usually up to 1 cm. Larger tissue defect gaps typically require both scaffolds and cells for normal tissue regeneration to occur without scar formation. Various strategies can help to modulate the scar response and can potentially enhance tissue regeneration. Understanding the mechanistic basis of such multivariate interactions as the scar microenvironment, the immune system, extracellular matrix, and inflammatory cytokines may enable the design of tissue engineering and wound healing strategies that directly modulate the healing response in a manner favorable to regeneration.
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22
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Chen FM, Jin Y. Periodontal tissue engineering and regeneration: current approaches and expanding opportunities. TISSUE ENGINEERING PART B-REVIEWS 2010; 16:219-55. [PMID: 19860551 DOI: 10.1089/ten.teb.2009.0562] [Citation(s) in RCA: 212] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The management of periodontal tissue defects that result from periodontitis represents a medical and socioeconomic challenge. Concerted efforts have been and still are being made to accelerate and augment periodontal tissue and bone regeneration, including a range of regenerative surgical procedures, the development of a variety of grafting materials, and the use of recombinant growth factors. More recently, tissue-engineering strategies, including new cell- and/or matrix-based dimensions, are also being developed, analyzed, and employed for periodontal regenerative therapies. Tissue engineering in periodontology applies the principles of engineering and life sciences toward the development of biological techniques that can restore lost alveolar bone, periodontal ligament, and root cementum. It is based on an understanding of the role of periodontal formation and aims to grow new functional tissues rather than to build new replacements of periodontium. Although tissue engineering has merged to create more opportunities for predictable and optimal periodontal tissue regeneration, the technique and design for preclinical and clinical studies remain in their early stages. To date, the reconstruction of small- to moderate-sized periodontal bone defects using engineered cell-scaffold constructs is technically feasible, and some of the currently developed concepts may represent alternatives for certain ideal clinical scenarios. However, the predictable reconstruction of the normal structure and functionality of a tooth-supporting apparatus remains challenging. This review summarizes current regenerative procedures for periodontal healing and regeneration and explores their progress and difficulties in clinical practice, with particular emphasis placed upon current challenges and future possibilities associated with tissue-engineering strategies in periodontal regenerative medicine.
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Affiliation(s)
- Fa-Ming Chen
- Department of Periodontology and Oral Medicine, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, P.R. China
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23
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Kim KS, Lee JY, Kang YM, Kim ES, Lee B, Chun HJ, Kim JH, Min BH, Lee HB, Kim MS. Electrostatic Crosslinked In Situ–Forming In Vivo Scaffold for Rat Bone Marrow Mesenchymal Stem Cells. Tissue Eng Part A 2009; 15:3201-9. [DOI: 10.1089/ten.tea.2008.0704] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Kyung Sook Kim
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
- Department of Polymer Engineering, Pukyong National University, Busan, Korea
| | - Ju Young Lee
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
| | - Yun Mi Kang
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
| | - E Sle Kim
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
| | - Bong Lee
- Department of Polymer Engineering, Pukyong National University, Busan, Korea
| | - Heung Jae Chun
- Department of Biomedical Sciences, College of Medicine, Catholic University, Seoul, Korea
| | - Jae Ho Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Byoung Hyun Min
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Hai Bang Lee
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
| | - Moon Suk Kim
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
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24
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Ahn HH, Kim KS, Lee JH, Lee JY, Kim BS, Lee IW, Chun HJ, Kim JH, Lee HB, Kim MS. In vivo osteogenic differentiation of human adipose-derived stem cells in an injectable in situ-forming gel scaffold. Tissue Eng Part A 2009; 15:1821-32. [PMID: 19132893 DOI: 10.1089/ten.tea.2008.0386] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The sol-to-gel transition occurring at around body temperature makes the MPEG-PCL diblock copolymer an ideal candidate material for use as an injectable in situ-forming gel containing human adipose tissue-derived stem cells (hADSCs). The sol can be prepared at room temperature, and the gel forms at body temperature. Solutions of the copolymer containing hADSCs and osteogenic factors injected into rats formed gel scaffolds at the injection sites. The gels thus formed showed the interconnective pore structure required to support growth, proliferation, and differentiation of hADSCs. Bromodeoxyuridine-labeled hADSCs were confirmed to be present in gels formed in vivo. Bone formation was observed only in gel implants containing both hADSCs and osteogenic factors. Subcutaneous implantation of the in situ-forming gel scaffold demonstrated that hADSCs embedded in the gel stimulated much lower host tissue responses than did the gel alone, probably because of the unique immunomodulatory properties of hADSCs. In conclusion, our data on hADSCs embedded in an in situ gel scaffold suggest that this formulation may provide numerous benefits as a noninvasive alternative for tissue-engineered bone formation.
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Affiliation(s)
- Hyun Hee Ahn
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
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25
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Mountziaris PM, Mikos AG. Modulation of the inflammatory response for enhanced bone tissue regeneration. TISSUE ENGINEERING PART B-REVIEWS 2009; 14:179-86. [PMID: 18544015 DOI: 10.1089/ten.teb.2008.0038] [Citation(s) in RCA: 319] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Proinflammatory cytokines are infamous for their catabolic effects on tissues and joints in both inflammatory diseases and following the implantation of biomedical devices. However, recent studies indicate that many of these same molecules are critical for triggering tissue regeneration following injury. This review will discuss the role of inflammatory signals in regulating bone regeneration and the impact of both immunomodulatory and antiinflammatory pharmacologic agents on fracture healing, to demonstrate the importance of incorporating rational control of inflammation into the design of tissue engineering strategies.
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26
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Ringel I, Lecht S, Sterin M, Lelkes PI, Lazarovici P. 31P magnetic resonance spectroscopy of endothelial cells grown in three-dimensional matrigel constructs as an enabling platform technology: II. The effect of anti-inflammatory drugs on phosphometabolite levels. ENDOTHELIUM : JOURNAL OF ENDOTHELIAL CELL RESEARCH 2008; 15:299-307. [PMID: 19065321 DOI: 10.1080/10623320802487874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In the accompanying study, the authors presented phosphometabolite patterns of endothelial cells grown under three-dimensional (3D) conditions using (31)P magnetic resonance spectroscopy (MRS). Here the authors describe the effect of nonsteroidal anti-inflammatory drugs (NSAIDs), using this enabling platform technology, which is relevant for evaluating drug effects in tissue-engineered endothelial constructs. Treatment with indomethacin significantly changed the phosphometabolite fingerprint in this endothelial model, by, respectively, increasing (81%) and decreasing (42%) glycerophosphocholine (GPC) and phosphomonoesters (PM). Furthermore, a safer approach using a NSAID prodrug was also demonstrated in this study with a indomethacin phospholipid-derived prodrug (DP-155). Like the parental drug, DP-155 increased and decreased the levels of GPC and PM by 100% and 20%, respectively. These changes represent useful biomarkers to monitor NSAID effects on endothelized tissue-engineered constructs for the purpose of controlling endothelial cell survival and inflammation upon implantation.
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Affiliation(s)
- I Ringel
- Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
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27
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Moreno-Sanz C, Picazo-Yeste JS, Manzanera-Díaz M, Herrero-Bogajo ML, Cortina-Oliva J, Tadeo-Ruiz G. Prevention of Trocar Site Hernias: Description of the Safe Port Plug Technique and Preliminary Results. Surg Innov 2008; 15:100-4. [DOI: 10.1177/1553350608318789] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this study was to describe a new technique to prevent the development of incisional hernias in trocar sites. Between March and June 2006, a pilot study was conducted to determine the feasibility of the safe port plug technique using the Bioabsorbable Hernia Plug to prevent incisional hernia in trocar sites. The device was implanted in the umbilical trocar site (10-11 mm) of 17 patients undergoing laparoscopic surgery during the study period. The mean follow-up of patients was 14.6 months. Implantation of the Bioabsorbable Hernia Plug device by the safe port plug technique was possible in all cases. No patient presented complications in the follow-up. Our preliminary experience suggests that this technique is simple and feasible, and we hypothesized that this technique could be superior to conventional fascial closure: a hypothesis that must be proven in a randomized prospective trial that is currently in progress.
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Affiliation(s)
- Carlos Moreno-Sanz
- Department of Surgery, La Mancha-Centro General Hospital, San Juan, Ciudad Real, Spain,
| | | | - Marina Manzanera-Díaz
- Department of Surgery, La Mancha-Centro General Hospital, San Juan, Ciudad Real, Spain
| | | | - Javier Cortina-Oliva
- Department of Surgery, La Mancha-Centro General Hospital, San Juan, Ciudad Real, Spain
| | - Gloria Tadeo-Ruiz
- Department of Surgery, La Mancha-Centro General Hospital, San Juan, Ciudad Real, Spain
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28
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Serhan CN, Chiang N. Endogenous pro-resolving and anti-inflammatory lipid mediators: a new pharmacologic genus. Br J Pharmacol 2008; 153 Suppl 1:S200-15. [PMID: 17965751 PMCID: PMC2268040 DOI: 10.1038/sj.bjp.0707489] [Citation(s) in RCA: 305] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Revised: 08/31/2007] [Accepted: 09/01/2007] [Indexed: 01/23/2023] Open
Abstract
Complete resolution of an acute inflammatory response and its return to homeostasis are essential for healthy tissues. Here, we overview ongoing efforts to characterize cellular and molecular mechanisms that govern the resolution of self-limited inflammation. Systematic temporal analyses of evolving inflammatory exudates using mediator lipidomics-informatics, proteomics, and cellular trafficking with murine resolving exudates demonstrate novel endogenous pathways of local-acting mediators that share both anti-inflammatory and pro-resolving properties. In murine systems, resolving-exudate leukocytes switch their phenotype to actively generate new families of mediators from major omega-3 fatty acids EPA and DHA termed resolvins and protectins. Recent advances on their biosynthesis and actions are reviewed with a focus on the E-series resolvins (RvE1, RvE2), D series resolvins (RvD1, RvD2) and the protectins including neuroprotectin D1/protectin D1 (NPD1/PD1) as well as their aspirin-triggered epimeric forms. Members of each new family demonstrate potent stereo-specific actions, joining the lipoxins as endogenous local signals that govern resolution and endogenous anti-inflammation mechanisms. In addition to their origins and roles in resolution biology in the immune system, recent findings indicate that these new mediator families also display potent protective actions in lung, kidney, and eye as well as enhance microbial clearance. Thus, these endogenous agonists of resolution pathways constitute a novel genus of chemical mediators that possess pro-resolving, anti-inflammatory, and antifibrotic as well as host-directed antimicrobial actions. These may be useful in the design of new therapeutics and treatments for diseases with the underlying trait of uncontrolled inflammation and redox organ stress.
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Affiliation(s)
- C N Serhan
- Department of Anesthesiology, Center for Experimental Therapeutics and Reperfusion Injury, Perioperative and Pain Medicine, Brigham and Women's Hospital, Boston, MA, USA.
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29
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Collier JH. Modular self-assembling biomaterials for directing cellular responses. SOFT MATTER 2008; 4:2310-2315. [PMID: 20198120 PMCID: PMC2829887 DOI: 10.1039/b805563g] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Self-assembling biomaterials are promising as cell-interactive matrices because they can be constructed in a modular fashion, which enables the independent and simultaneous tuning of several of their physicochemical and biological properties. Such modularity facilitates the optimization of multi-component matrices for use in complex biological environments such as 3-D cell culture or scaffolds for regenerative medicine. This Highlight will discuss recent strategies for producing modular self-assembling biomaterials, with a particular focus on how ligand presentation and matrix mechanics can be controlled in modular ways. In addition, it will discuss key hurdles that remain for employing these materials as cell-interactive scaffolds in biomedical applications, particularly those that relate to how they may interface with the immune system.
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Affiliation(s)
- Joel H Collier
- Joel H. Collier, Ph.D., Assistant Professor, Department of Surgery and Committee on Molecular Medicine, University of Chicago, 5841 S. Maryland Ave, Abbott Hall AB522, Chicago, IL 60637 USA,
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