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Toita R, Kitamura M, Tsuchiya A, Kang JH, Kasahara S. Releasable, Immune-Instructive, Bioinspired Multilayer Coating Resists Implant-Induced Fibrosis while Accelerating Tissue Repair. Adv Healthc Mater 2024; 13:e2302611. [PMID: 38095751 DOI: 10.1002/adhm.202302611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Indexed: 12/21/2023]
Abstract
Implantable biomaterials trigger foreign body reactions (FBRs), which reduces the functional life of medical devices and prevents effective tissue regeneration. Although existing therapeutic approaches can circumvent collagen-rich fibrotic encapsulation secondary to FBRs, they disrupt native tissue repair. Herein, a new surface engineering strategy in which an apoptotic-mimetic, immunomodulatory, phosphatidylserine liposome (PSL) is released from an implant coating to induce the formation of a macrophage phenotype that mitigates FBRs and improves tissue healing is described. PSL-multilayers constructed on implant surfaces via the layer-by-layer method release PSLs over a 1-month period. In rat muscles, poly(etheretherketone) (PEEK), a nondegradable polymer implant model, induces FBRs with dense fibrotic scarring under an aberrant cellular profile that recruits high levels of inflammatory infiltrates, foreign body giant cells (FBGCs), scar-forming myofibroblasts, and inflammatory M1-like macrophages but negligible amounts of anti-inflammatory M2-like phenotypes. However, the PSL-multilayer coating markedly diminishes these detrimental signatures by shifting the macrophage phenotype. Unlike other therapeutics, PSL-multilayered coatings also stimulate muscle regeneration. This study demonstrates that PSL-multilayered coatings are effective in eliminating FBRs and promoting regeneration, hence offering potent and broad applications for implantable biomaterials.
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Affiliation(s)
- Riki Toita
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan
- AIST-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, AIST, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masahiro Kitamura
- Niterra Co., Ltd., 2808 Iwasaki, Komaki, Aichi, 485-8510, Japan
- NGK Spark Plug-AIST Healthcare Materials Cooperative Research Laboratory, 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya, Aichi, 463-8560, Japan
| | - Akira Tsuchiya
- Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Jeong-Hun Kang
- Division of Biopharmaceutics and Pharmacokinetics, National Cerebral and Cardiovascular Center Research Institute, 6-1 Shinmachi, Kishibe, Suita, Osaka, 564-8565, Japan
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2
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Chan AHP, Moore MJ, Grant AJ, Lam YTM, Darnell MV, Michael PL, Wise SG, Tan RP. Selective Immunosuppression Targeting the NLRP3 Inflammasome Mitigates the Foreign Body Response to Implanted Biomaterials While Preserving Angiogenesis. Adv Healthc Mater 2023; 12:e2301571. [PMID: 37846971 DOI: 10.1002/adhm.202301571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 10/04/2023] [Indexed: 10/18/2023]
Abstract
Medical devices are a mainstay of the healthcare industry, providing clinicians with innovative tools to diagnose, monitor, and treat a range of medical conditions. For implantable devices, it is widely regarded that chronic inflammation during the foreign body response (FBR) is detrimental to device performance, but also required for tissue regeneration and host integration. Current strategies to mitigate the FBR rely on broad acting anti-inflammatory drugs, most commonly, dexamethasone (DEX), which can inhibit angiogenesis and compromise long-term device function. This study challenges prevailing assumptions by suggesting that FBR inflammation is multifaceted, and selectively targeting its individual pathways can stop implant fibrosis while preserving beneficial repair pathways linked to improved device performance. MCC950, an anti-inflammatory drug that selectively inhibits the NLRP3 inflammasome, targets pathological inflammation without compromising global immune function. The effects of MCC950 and DEX on the FBR are compared using implanted polycaprolactone (PCL) scaffolds. The results demonstrate that both DEX and MCC950 halt immune cell recruitment and cytokine release, leading to reduced FBR. However, MCC950 achieves this while supporting capillary growth and enhancing tissue angiogenesis. These findings support selective immunosuppression approaches as a potential future direction for treating the FBR and enhancing the longevity and safety of implantable devices.
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Affiliation(s)
- Alex H P Chan
- School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - Matthew J Moore
- School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - Angus J Grant
- School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - Yuen Ting Monica Lam
- School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - Matthew V Darnell
- School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - Praveesuda L Michael
- School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - Steven G Wise
- School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - Richard P Tan
- School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
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3
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Controlled release of low-molecular weight, polymer-free corticosteroid coatings suppresses fibrotic encapsulation of implanted medical devices. Biomaterials 2022; 286:121586. [DOI: 10.1016/j.biomaterials.2022.121586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 05/12/2022] [Accepted: 05/15/2022] [Indexed: 11/23/2022]
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4
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Macias SL, Keselowsky BG. Perspectives on immunometabolism at the biomaterials interface. Mol Aspects Med 2021; 83:100992. [PMID: 34332772 DOI: 10.1016/j.mam.2021.100992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 07/12/2021] [Indexed: 11/16/2022]
Abstract
Productive engagement of the immune system is a persistent challenge for biomaterials scientists. Immune engineering offers a new perspective on biomaterial design, with immune cell interaction to modulate effector functions at the center. The effector functions of these cells are intimately linked to their metabolic needs and programming. Immune cell metabolism has received renewed attention in recent years, and with each new discovery there is opportunity for biomaterials scientists. This prospectus aims to provide an overview of the most recent advances in biomaterial engagement of immune cells alongside interrogation of immunometabolism, while looking to future avenues of coalescence. Four cell types are highlighted here: neutrophils, macrophages, dendritic cells, and T cells. Consideration of these two fields, and the tools within each, with a forward-looking mindset is the key to a new era of biomaterials.
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Affiliation(s)
- Sabrina L Macias
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611, USA
| | - Benjamin G Keselowsky
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611, USA; Department of Pathology, Immunology and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL, 32610, USA.
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5
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Zhang Q, Meyerhoff ME. Nitric Oxide Release for Enhanced Biocompatibility and Analytical Performance of Implantable Electrochemical Sensors. ELECTROANAL 2021. [DOI: 10.1002/elan.202100174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Qi Zhang
- Department of Chemistry University of Michigan Ann Arbor MI 48109 USA
| | - Mark E. Meyerhoff
- Department of Chemistry University of Michigan Ann Arbor MI 48109 USA
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6
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Kharbikar BN, Chendke GS, Desai TA. Modulating the foreign body response of implants for diabetes treatment. Adv Drug Deliv Rev 2021; 174:87-113. [PMID: 33484736 PMCID: PMC8217111 DOI: 10.1016/j.addr.2021.01.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/30/2020] [Accepted: 01/10/2021] [Indexed: 02/06/2023]
Abstract
Diabetes Mellitus is a group of diseases characterized by high blood glucose levels due to patients' inability to produce sufficient insulin. Current interventions often require implants that can detect and correct high blood glucose levels with minimal patient intervention. However, these implantable technologies have not reached their full potential in vivo due to the foreign body response and subsequent development of fibrosis. Therefore, for long-term function of implants, modulating the initial immune response is crucial in preventing the activation and progression of the immune cascade. This review discusses the different molecular mechanisms and cellular interactions involved in the activation and progression of foreign body response (FBR) and fibrosis, specifically for implants used in diabetes. We also highlight the various strategies and techniques that have been used for immunomodulation and prevention of fibrosis. We investigate how these general strategies have been applied to implants used for the treatment of diabetes, offering insights on how these devices can be further modified to circumvent FBR and fibrosis.
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Affiliation(s)
- Bhushan N Kharbikar
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Gauree S Chendke
- University of California Berkeley - University of California San Francisco Graduate Program in Bioengineering, San Francisco, CA 94143, USA
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94143, USA; University of California Berkeley - University of California San Francisco Graduate Program in Bioengineering, San Francisco, CA 94143, USA; Department of Bioengineering, University of California, Berkeley, CA 94720, USA.
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7
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Malone-Povolny MJ, Bradshaw TM, Merricks EP, Long CT, Nichols TC, Schoenfisch MH. Combination of Nitric Oxide Release and Surface Texture for Mitigating the Foreign Body Response. ACS Biomater Sci Eng 2021; 7:2444-2452. [PMID: 33848421 DOI: 10.1021/acsbiomaterials.1c00022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The tissue response to polyurethane (PU)-coated implants employing active and/or passive FBR mitigation techniques was evaluated over a 28 day study in a diabetic swine model. Active FBR mitigation was achieved through the sustained release of nitric oxide (NO) from a mesoporous silica nanoparticle-doped PU coating. Passive FBR mitigation was achieved through the application of a foam- or fiber-based topcoat. These topcoats were designed to possess topographical features known to promote tissue integration with foam-coated implants having pore sizes of approximately 50 μm and fiber-coated implants consisting of fiber diameters of less than 1 μm. Nitric oxide-release profiles were minimally impacted by the presence of either topcoat. Inflammatory cell density and collagen density at the implant-tissue interface were assessed at 7, 14, 21, and 28 days following implantation. Nitric oxide-releasing implants had significantly lower inflammatory cell density and collagen density than non-NO-releasing controls. The presence of a topcoat did not significantly impact inflammatory cell density, though top-coated textured implants resulted in significantly lower collagen density, irrespective of NO release. Overall, coatings that combine NO release with surface texture demonstrated the greatest potential for tissue-based biomedical device applications.
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Affiliation(s)
- Maggie J Malone-Povolny
- Department of Chemistry, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - Taron M Bradshaw
- Department of Chemistry, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - Elizabeth P Merricks
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - C Tyler Long
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - Timothy C Nichols
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - Mark H Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
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8
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Rodrigues D, Barbosa AI, Rebelo R, Kwon IK, Reis RL, Correlo VM. Skin-Integrated Wearable Systems and Implantable Biosensors: A Comprehensive Review. BIOSENSORS-BASEL 2020; 10:bios10070079. [PMID: 32708103 PMCID: PMC7400150 DOI: 10.3390/bios10070079] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/07/2020] [Accepted: 07/16/2020] [Indexed: 12/21/2022]
Abstract
Biosensors devices have attracted the attention of many researchers across the world. They have the capability to solve a large number of analytical problems and challenges. They are future ubiquitous devices for disease diagnosis, monitoring, treatment and health management. This review presents an overview of the biosensors field, highlighting the current research and development of bio-integrated and implanted biosensors. These devices are micro- and nano-fabricated, according to numerous techniques that are adapted in order to offer a suitable mechanical match of the biosensor to the surrounding tissue, and therefore decrease the body’s biological response. For this, most of the skin-integrated and implanted biosensors use a polymer layer as a versatile and flexible structural support, combined with a functional/active material, to generate, transmit and process the obtained signal. A few challenging issues of implantable biosensor devices, as well as strategies to overcome them, are also discussed in this review, including biological response, power supply, and data communication.
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Affiliation(s)
- Daniela Rodrigues
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; (D.R.); (A.I.B.); (R.R.); (I.K.K.); (R.L.R.)
| | - Ana I. Barbosa
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; (D.R.); (A.I.B.); (R.R.); (I.K.K.); (R.L.R.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Portugal
| | - Rita Rebelo
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; (D.R.); (A.I.B.); (R.R.); (I.K.K.); (R.L.R.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Portugal
| | - Il Keun Kwon
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; (D.R.); (A.I.B.); (R.R.); (I.K.K.); (R.L.R.)
| | - Rui L. Reis
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; (D.R.); (A.I.B.); (R.R.); (I.K.K.); (R.L.R.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Portugal
- Department of Dental Materials, School of Dentistry, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
| | - Vitor M. Correlo
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; (D.R.); (A.I.B.); (R.R.); (I.K.K.); (R.L.R.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Portugal
- Correspondence:
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9
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Ahmadi Y, Kim KH. Functionalization and customization of polyurethanes for biosensing applications: A state-of-the-art review. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Design of a Sandwich Hierarchically Porous Membrane with Oxygen Supplement Function for Implantable Glucose Sensor. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10082848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This study aims to develop an oxygen regeneration layer sandwiched between multiple porous polyurethanes (PU) to improve the performance of implantable glucose sensors. Sensors were prepared by coating electrodes with platinum nanoparticles, Nafion, glucose oxidase and sandwich hierarchically porous membrane with an oxygen supplement function (SHPM-OS). The SHPM-OS consisted of a hierarchically porous structure synthesized by polyethylene glycol and PU and a catalase (Cat) layer that was coated between hierarchical membranes and used to balance the sensitivity and linearity of glucose sensors, as well as reduce the influence of oxygen deficiency during monitoring. Compared with the sensitivity and linearity of traditional non-porous (NO-P) sensors (35.95 nA/mM, 0.9987, respectively) and single porous (SGL-P) sensors (45.3 nA /mM, 0.9610, respectively), the sensitivity and linearity of the SHPM-OS sensor was 98.45 nA/mM and 0.9989, respectively, which was more sensitive with higher linearity. The sensor showed a response speed of five seconds and a relative sensitivity of 90% in the first 10 days and remained 78% on day 20. This sensor coated with SHPM-OS achieved rapid responses to changes of glucose concentration while maintaining high linearity for long monitoring times. Thus, it may reduce the difficulty of back-end hardware module development and assist with effective glucose self-management for people with diabetes.
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11
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Hui B, Yao X, Zhang L, Zhou Q. Dexamethasone sodium phosphate attenuates lipopolysaccharide-induced neuroinflammation in microglia BV2 cells. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:1761-1768. [PMID: 31915845 DOI: 10.1007/s00210-019-01775-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/09/2019] [Indexed: 12/17/2022]
Abstract
Abnormal neuroinflammation ignited by overproduction of chemokines and cytokines via microglial cells can induce the occurrence and development of neurodegenerative disorders. The aim of this study is to investigate the effects of dexamethasone sodium phosphate (Dex-SP) on chemokine and cytokine secretion in lipopolysaccharide (LPS)-activated microglial cells. LPS markedly enhanced the secretion of pro-inflammatory factors such as regulated on activation, normal T cell expressed and secreted (RANTES), transforming growth factor beta-β1 (TGF-β1) and nitric oxide (NO), but decreased the production of macrophage inflammatory protein-1α (MIP-1α) and interleukin 10 (IL-10) in BV-2 microglial cells. Furthermore, LPS increased BV-2 microglial cell migration. However, Dex-SP treatment had the opposite effect, dampening the secretion of RANTES, TGF-β1, and NO, while increasing the production of MIP-1α and IL-10 and blocking migration of LPS-stimulated BV-2 microglial cells. Furthermore, Dex-SP markedly suppressed the LPS-induced degradation of IRAK-1 and IRAK-4, and blocked the activation in TRAF6, p-TAK1, and p-JNK in BV-2 microglial cells. These results showed that Dex-SP inhibited the neuroinflammatory response and migration in LPS-activated BV-2 microglia by inhibiting the secretion of RANTES, TGF-β1, and NO and increasing the production of MIP-1α and IL-10. The molecular mechanism of Dex-SP may be associated with inhibition of TRAF6/TAK-1/JNK signaling pathways mediated by IRAK-1 and IRAK-4.
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Affiliation(s)
- Bin Hui
- College of Pharmacy, Shanghai University of Medical & Health Sciences, Shanghai, China
- Health School attached to Shanghai University of Medical & Health Sciences, Shanghai, China
| | - Xin Yao
- Jiyuan Shi People's Hospital, Jiyuan, Henan, China
| | - Liping Zhang
- Department of Emergency Medicine, Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China.
| | - Qinhua Zhou
- College of Medicine, Jiaxing University, Jiaxing, China.
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12
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Challenges for successful implantation of biofuel cells. Bioelectrochemistry 2018; 124:57-72. [DOI: 10.1016/j.bioelechem.2018.05.011] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 05/11/2018] [Accepted: 05/25/2018] [Indexed: 01/09/2023]
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13
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Gu B, Papadimitrakopoulos F, Burgess DJ. PLGA microsphere/PVA hydrogel coatings suppress the foreign body reaction for 6 months. J Control Release 2018; 289:35-43. [PMID: 30261203 DOI: 10.1016/j.jconrel.2018.09.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 09/17/2018] [Accepted: 09/22/2018] [Indexed: 01/18/2023]
Abstract
The application of dexamethasone releasing poly (lactic-co-glycolic acid) (PLGA) microspheres embedded in a poly vinyl alcohol (PVA) hydrogel coatings have been successfully used in the suppression of the foreign body response (FBR) to implantable glucose sensors. In the current study, dexamethasone-loaded PLGA microspheres were prepared by blending two types of PLGA polymers (RG503H and DLG7E with MW of ca. 25 kDa and 113 kDa, respectively) to achieve long-term (6 months) inhibition of the FBR. The microsphere composition was optimized according to the in vitro drug release profiles. Microspheres with DLG7E/RG503H/dexamethasone = 70/13.3/16.7 wt% composition, when embedded in a PVA hydrogel, provided a continuous drug release for 6 months. By combining the aforementioned microspheres with microspheres composed solely of the DLG7E polymer within a similar PVA hydrogel realized an even longer (>7 months) in vitro drug release. A heat map was constructed to depict the daily in vitro drug released and elucidate possible lag phases that could affect the pharmacodynamic response. These drug-loaded implant coatings were investigated in vivo (rat model) and showed inhibition of the foreign body response for 6 months. These results suggest that the minimum effective daily dose to counter chronic inflammation is ca. 0.1 μg per mg of coating surrounding a 0.5 × 0.5 × 5 mm silicon implant (dummy sensor). Accordingly, these drug-eluting composite coatings can ensure long-term inflammation control for miniaturized implantable devices.
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Affiliation(s)
- Bing Gu
- University of Connecticut, School of Pharmacy, Storrs, CT 06269, USA
| | | | - Diane J Burgess
- University of Connecticut, School of Pharmacy, Storrs, CT 06269, USA.
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14
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Reduction of measurement noise in a continuous glucose monitor by coating the sensor with a zwitterionic polymer. Nat Biomed Eng 2018; 2:894-906. [PMID: 30931173 PMCID: PMC6436621 DOI: 10.1038/s41551-018-0273-3] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Continuous glucose monitors (CGMs), used by patients with diabetes mellitus, can autonomously track fluctuations in blood glucose over time. However, the signal produced by CGMs during the initial recording period following sensor implantation contains substantial noise, requiring frequent recalibration via fingerprick tests. Here, we show that coating the sensor with a zwitterionic polymer, found via a combinatorial-chemistry approach, significantly reduces signal noise and improves CGM performance. We evaluated the polymer-coated sensors in mice as well as in healthy and diabetic non-human primates, and show that the sensors accurately record glucose levels without the need for recalibration. We also show that the polymer-coated sensors significantly abrogated immune responses to the sensor, as indicated by histology, fluorescent whole-body imaging of inflammation-associated protease activity, and gene expression of inflammation markers. The polymer coating may allow CGMs to become standalone measuring devices.
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Scholten K, Meng E. A review of implantable biosensors for closed-loop glucose control and other drug delivery applications. Int J Pharm 2018; 544:319-334. [DOI: 10.1016/j.ijpharm.2018.02.022] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 01/30/2018] [Accepted: 02/15/2018] [Indexed: 12/19/2022]
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Soto RJ, Merricks EP, Bellinger DA, Nichols TC, Schoenfisch MH. Influence of diabetes on the foreign body response to nitric oxide-releasing implants. Biomaterials 2017; 157:76-85. [PMID: 29245053 DOI: 10.1016/j.biomaterials.2017.11.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/22/2017] [Accepted: 11/27/2017] [Indexed: 12/21/2022]
Abstract
The foreign body response (FBR) to nitric oxide (NO)-releasing subcutaneous implants was compared between healthy and streptozotocin-induced diabetic swine by evaluating inflammation, collagen capsule formation, and angiogenesis. Steel wire substrates were first modified with polyurethane membranes capable of diverse NO-release kinetics (NO fluxes and release durations of 0.8-630.0 pmol cm-2 s-1 and 2-13 d, respectively). The NO-releasing materials were implanted in the subcutis for 3, 10, or 25 d for histological and immunohistochemical evaluation of the FBR. A delayed, more severe inflammatory response to control (i.e., non-NO-releasing) implants was observed in diabetic pigs relative to healthy swine. Regardless of the animal disease state, each NO-releasing implant tested elicited reduced inflammation compared to controls at both 3 and 10 d. However, only the NO-release materials capable of releasing low NO fluxes (0.8-3.3 pmol cm-2 s-1) for 7-13 d durations mitigated the inflammatory response at 25 d. Using immunohistochemical staining for the endothelial cell surface marker CD-31, we also observed poor blood vessel development at non-NO-releasing implants in diabetic swine. Relative to controls, NO-releasing implants with the longest NO-release duration (13 d) increased blood vessel densities by 47.1 and 70.4% in the healthy and diabetic pigs, respectively. In the healthy model, tissues surrounding the long NO-release materials contained sparse amounts of collagen, whereas implants with shorter NO-release durations (2, 3, and 7 d) were characterized with a dense collagen encapsulation layer, similar to controls. Collagen deposition in diabetic swine was inhibited, and unaffected by NO. These results emphasize several key differences in the FBR in the setting of acute onset diabetes. The observation that NO release counteracts the more severe FBR in diabetic swine while simultaneously promoting tissue integration may help guide the design of medical implants (e.g., glucose sensors) with improved performance for diabetes management.
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Affiliation(s)
- Robert J Soto
- Department of Chemistry, University of North Carolina, Chapel Hill, NC, 27599, United States
| | - Elizabeth P Merricks
- Departments of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, 27599, United States
| | - Dwight A Bellinger
- Departments of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, 27599, United States
| | - Timothy C Nichols
- Departments of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, 27599, United States
| | - Mark H Schoenfisch
- Department of Chemistry, University of North Carolina, Chapel Hill, NC, 27599, United States.
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Shoaib M, Bahadur A, Iqbal S, Rahman MSU, Ahmed S, Shabir G, Javaid MA. Relationship of hard segment concentration in polyurethane-urea elastomers with mechanical, thermal and drug release properties. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2016.12.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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19
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Soto RJ, Hall JR, Brown MD, Taylor JB, Schoenfisch MH. In Vivo Chemical Sensors: Role of Biocompatibility on Performance and Utility. Anal Chem 2017; 89:276-299. [PMID: 28105839 PMCID: PMC6773264 DOI: 10.1021/acs.analchem.6b04251] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Robert J. Soto
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
| | - Jackson R. Hall
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
| | - Micah D. Brown
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
| | - James B. Taylor
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
| | - Mark H. Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
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20
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Luo L, He Y, Chang Q, Xie G, Zhan W, Wang X, Zhou T, Xing M, Lu F. Polycaprolactone nanofibrous mesh reduces foreign body reaction and induces adipose flap expansion in tissue engineering chamber. Int J Nanomedicine 2016; 11:6471-6483. [PMID: 27980405 PMCID: PMC5147407 DOI: 10.2147/ijn.s114295] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Tissue engineering chamber technique can be used to generate engineered adipose tissue, showing the potential for the reconstruction of soft tissue defects. However, the consequent foreign body reaction induced by the exogenous chamber implantation causes thick capsule formation on the surface of the adipose flap following capsule contracture, which may limit the internal tissue expansion. The nanotopographical property and architecture of nanofibrous scaffold may serve as a promising method for minimizing the foreign body reaction. Accordingly, electrospinning porous polycaprolactone (PCL) nanofibrous mesh, a biocompatible synthetic polymer, was attached to the internal surface of the chamber for the reducing local foreign body reaction. Adipose flap volume, level of inflammation, collagen quantification, capsule thickness, and adipose tissue-specific gene expression in chamber after implantation were evaluated at different time points. The in vivo study revealed that the engineered adipose flaps in the PCL group had a structure similar to that in the controls and normal adipose tissue structure but with a larger flap volume. Interleukin (IL)-1β, IL-6, and transforming growth factor-β expression decreased significantly in the PCL group compared with the control. Moreover, the control group had much more collagen deposition and thicker capsule than that observed in the PCL group. These results indicate that the unique nanotopographical effect of electrospinning PCL nanofiber can reduce foreign body reaction in a tissue engineering chamber, which maybe a promising new method for generating a larger volume of mature, vascularized, and stable adipose tissue.
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Affiliation(s)
- Lin Luo
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Yunfan He
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
- Department of Mechanical Engineering, Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Qiang Chang
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
- Department of Mechanical Engineering, Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Gan Xie
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Weiqing Zhan
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Xuecen Wang
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Tao Zhou
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Malcolm Xing
- Department of Mechanical Engineering, Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada
- Children’s Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
| | - Feng Lu
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
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21
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Bensiamar F, Olalde B, Cifuentes SC, Argarate N, Atorrasagasti G, González-Carrasco JL, García-Rey E, Vilaboa N, Saldaña L. Bioactivity of dexamethasone-releasing coatings on polymer/magnesium composites. Biomed Mater 2016; 11:055011. [DOI: 10.1088/1748-6041/11/5/055011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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22
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Zhang J, Woodruff TM, Clark RJ, Martin DJ, Minchin RF. Release of bioactive peptides from polyurethane films in vitro and in vivo: Effect of polymer composition. Acta Biomater 2016; 41:264-72. [PMID: 27245428 DOI: 10.1016/j.actbio.2016.05.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 04/26/2016] [Accepted: 05/03/2016] [Indexed: 12/11/2022]
Abstract
UNLABELLED Thermoplastic polyurethanes (TPUs) are widely used in biomedical applications due to their excellent biocompatibility. Their role as matrices for the delivery of small molecule therapeutics has been widely reported. However, very little is known about the release of bioactive peptides from this class of polymers. Here, we report the release of linear and cyclic peptides from TPUs with different hard and soft segments. Solvent casting of the TPU at room temperature mixed with the different peptides resulted in reproducible efflux profiles with no evidence of drug degradation. Peptide release was dependent on the size as well as the composition of the TPU. Tecoflex 80A (T80A) showed more extensive release than ElastEon 5-325, which correlated with a degree of hydration. It was also shown that the composition of the medium influenced the rate and extent of peptide efflux. Blending the different TPUs allowed for better control of peptide efflux, especially the initial burst effect. Peptide-loaded TPU prolonged the plasma levels of the anti-inflammatory cyclic peptide PMX53, which normally has a plasma half-life of less than 30min. Using a blend of T80A and E5-325, therapeutic plasma levels of PMX53 were observed up to 9days following a single intraperitoneal implantation of the drug-loaded film. PMX53 released from the blended TPUs significantly inhibited B16-F10 melanoma tumor growth in mice demonstrating its bioactivity in vivo. This study provides important findings for TPU-based therapeutic peptide delivery that could improve the pharmacological utility of peptides as therapeutics. STATEMENT OF SIGNIFICANCE Therapeutic peptides can be highly specific and potent pharmacological agents, but are poorly absorbed and rapidly degraded in the body. This can be overcome by using a matrix that protects the peptide in vivo and promotes its slow release so that a therapeutic effect can be achieved over days or weeks. Thermoplastic polyurethanes are a versatile family of polymers that are biocompatible and used for medical implants. Here, the release of several peptides from a range of polyurethanes was shown to depend on the type of polymer used in the polyurethane. This is the first study to examine polyurethane blends for peptide delivery and shows that the rate and extent of peptide release can be fine-tuned using different hard and soft segment mixtures in the polymer.
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Affiliation(s)
- Jing Zhang
- School of Biomedical Sciences, University of Queensland, St Lucia, Queensland 4072, Australia
| | - Trent M Woodruff
- School of Biomedical Sciences, University of Queensland, St Lucia, Queensland 4072, Australia
| | - Richard J Clark
- School of Biomedical Sciences, University of Queensland, St Lucia, Queensland 4072, Australia
| | - Darren J Martin
- Australian Institute for Bioengineering and Nanotechnology, University of Queensland, St Lucia, Queensland 4072, Australia
| | - Rodney F Minchin
- School of Biomedical Sciences, University of Queensland, St Lucia, Queensland 4072, Australia.
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23
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Cao Z, Wang D, Lyu L, Gong Y, Li Y. Fabrication and characterization of PCL/CaCO3 electrospun composite membrane for bone repair. RSC Adv 2016. [DOI: 10.1039/c5ra22548e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CaCO3/casein microspheres were entrapped in PCL membranes using electrospinning to mimic the hierarchical structure of ECM in bone. The composite membranes showed enhanced biomineralization property, proliferation and osteogenic differentiation potential of HMSCs.
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Affiliation(s)
- Zhinan Cao
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| | - Dandan Wang
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| | - Lingwei Lyu
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| | - Yihong Gong
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
| | - Yan Li
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P.R. China
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Vallejo-Heligon SG, Brown NL, Reichert WM, Klitzman B. Porous, Dexamethasone-loaded polyurethane coatings extend performance window of implantable glucose sensors in vivo. Acta Biomater 2016; 30:106-115. [PMID: 26537203 DOI: 10.1016/j.actbio.2015.10.045] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 10/07/2015] [Accepted: 10/28/2015] [Indexed: 10/22/2022]
Abstract
Continuous glucose sensors offer the promise of tight glycemic control for insulin dependent diabetics; however, utilization of such systems has been hindered by issues of tissue compatibility. Here we report on the in vivo performance of implanted glucose sensors coated with Dexamethasone-loaded (Dex-loaded) porous coatings employed to mediate the tissue-sensor interface. Two animal studies were conducted to (1) characterize the tissue modifying effects of the porous Dex-loaded coatings deployed on sensor surrogate implants and (2) investigate the effects of the same coatings on the in vivo performance of Medtronic MiniMed SOF-SENSOR™ glucose sensors. The tissue response to implants was evaluated by quantifying macrophage infiltration, blood vessel formation, and collagen density around implants. Sensor function was assessed by measuring changes in sensor sensitivity and time lag, calculating the Mean Absolute Relative Difference (MARD) for each sensor treatment, and performing functional glucose challenge test at relevant time points. Implants treated with porous Dex-loaded coatings diminished inflammation and enhanced vascularization of the tissue surrounding the implants. Functional sensors with Dex-loaded porous coatings showed enhanced sensor sensitivity over a 21-day period when compared to controls. Enhanced sensor sensitivity was accompanied with an increase in sensor signal lag and MARD score. These results indicate that Dex-loaded porous coatings were able to elicit an attenuated tissue response, and that such tissue microenvironment could be conducive towards extending the performance window of glucose sensors in vivo. STATEMENT OF SIGNIFICANCE In the present article, a coating to extend the functionality of implantable glucose sensors in vivo was developed. Our study showed that the delivery of an anti-inflammatory agent with the presentation of micro-sized topographical cues from coatings may lead to improved long-term glucose sensor function in vivo. We believe that improved function of sensors treated with the novel coatings was a result of the observed decreases in inflammatory cell density and increases in vessel density of the tissue adjacent to the devices. Furthermore, extending the in vivo functionality of implantable glucose sensors may lead to greater adoption of these devices by diabetic patients.
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Keeler GD, Durdik JM, Stenken JA. Effects of delayed delivery of dexamethasone-21-phosphate via subcutaneous microdialysis implants on macrophage activation in rats. Acta Biomater 2015; 23:27-37. [PMID: 25985913 DOI: 10.1016/j.actbio.2015.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/25/2015] [Accepted: 05/11/2015] [Indexed: 12/25/2022]
Abstract
Macrophage activation is of interest in the biomaterials field since macrophages with an M(Dex) characteristic phenotype, i.e., CD68(+)CD163(+), are believed to result in improved integration of the biomaterial as well as improved tissue remodeling and increased biomaterial longevity. To facilitate delivery of a macrophage modulator, dexamethasone-21-phosphate (Dex), microdialysis probes were subcutaneously implanted in male Sprague-Dawley rats. Dex localized delivery was delayed to the third day post implantation as a means to alter macrophage activation state at an implant site. To better elucidate the molecular mechanisms associated with M(Dex) macrophage activation, CCL2 was quantified in dialysates, gene expression ratios were determined from excised tissue surrounding the implant, histological analyses, and immunohistochemical analyses (CD68, CD163) were performed. Delayed Dex infusion resulted in the up-regulation of IL-6 at the transcript level in the tissue in contact with the microdialysis probe and decreased CCL2 concentrations collected in dialysates. Histological analyses showed increased cellular density as compared to controls in response to delayed Dex infusion. Dex delayed infusion resulted in an increased percentage of CD68(+)CD163(+), M(Dex), macrophages in the tissue surrounding the microdialysis probe as compared to probes that served as controls.
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Affiliation(s)
- Geoffrey D Keeler
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, AR 72701, USA; Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
| | - Jeannine M Durdik
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, AR 72701, USA; Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USA
| | - Julie A Stenken
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, AR 72701, USA; Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA.
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26
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Kastellorizios M, Tipnis N, Burgess DJ. Foreign Body Reaction to Subcutaneous Implants. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 865:93-108. [DOI: 10.1007/978-3-319-18603-0_6] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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