1
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Wu J, Guo W, Wang Y, Liu J, Wang H, Zheng Z, Wang X, Kaplan DL. Stabilization and Sustained Release of Fragrances Using Silk-PEG Microspheres. ACS Biomater Sci Eng 2023. [PMID: 37144723 DOI: 10.1021/acsbiomaterials.3c00064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Fragrances, which are commonly used in food, textiles, consumer products, and medical supplies, are volatile compounds that require stabilization and controlled release due to their sensitivity to environmental conditions such as light, oxygen, temperature, and humidity. Encapsulation in various material matrices is a desired technique for these purposes, and there is a growing interest in using sustainable natural materials to reduce environmental impact. In this study, fragrance encapsulation in microspheres made from silk fibroin (SF) was investigated. Fragrance-loaded silk fibroin microspheres (Fr-SFMSs) were prepared by adding fragrance/surfactant emulsions to silk solutions, followed by mixing them with polyethylene glycol under ambient conditions. The study investigated eight different fragrances, where citral, beta-ionone, and eugenol showed higher binding affinities to silk than the other five fragrances, resulting in better microsphere formation with uniform sizes and higher fragrance loading (10-30%). Citral-SFMSs showed characteristic crystalline β-sheet structures of SF, high thermal stability (initial weight loss at 255 °C), long shelf life at 37 °C (>60 days), and sustained release (∼30% of citral remained after incubation at 60 °C for 24 h). When citral-SFMSs with different sizes were used to treat cotton fabrics, about 80% of the fragrance remained on the fabrics after one wash, and the duration of release from the treated fabrics was significantly longer than that of control samples treated with citral alone (no microspheres). This method of preparing Fr-SFMSs has potential applications in textile finishing, cosmetics, and the food industry.
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Affiliation(s)
- Jianbing Wu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
- College of Textile, Garment and Design, Changshu Institute of Technology, Suzhou 215500, People's Republic of China
| | - Wenjun Guo
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Yongfeng Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Jian Liu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Heng Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Zhaozhu Zheng
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Xiaoqin Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
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2
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Qi Z, Tao X, Tan G, Tian B, Zhang L, Kundu SC, Lu S. Electro-responsive silk fibroin microneedles for controlled release of insulin. Int J Biol Macromol 2023; 242:124684. [PMID: 37148951 DOI: 10.1016/j.ijbiomac.2023.124684] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/23/2023] [Accepted: 04/27/2023] [Indexed: 05/08/2023]
Abstract
To date, very limited work has been done on convenient and active control of insulin release. Herein, we report an electro-responsive insulin delivery system based on thiolated silk fibroin. The disulfide cross-linking points in TSF were reduced and broken to form sulfhydryl groups under electrification, which led to the increase of microneedle swelling degree and promoted insulin release. After power failure, the sulfhydryl group is oxidised to form disulfide bond crosslinking point again, resulting in the reduction of microneedle swelling degree and thus the reduction of release rate. The insulin loaded in the electro-responsive insulin delivery system showed good reversible electroresponsive release performance. The addition of graphene reduced the microneedle resistance and increased the drug release rate under current conditions. In vivo studies on type 1 diabetic mice show that electro-responsive insulin delivery system effectively controls the blood glucose before and after feeding by switching on and off the power supply, and this blood glucose control can be maintained within the safe range (100-200 mg/dL) for a long time (11h). Such electrically responsive delivery microneedles show potential for integration with glucose signal monitoring and are expected to build closed-loop insulin delivery systems.
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Affiliation(s)
- Zhenzhen Qi
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Xiaosheng Tao
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Guohongfang Tan
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Bin Tian
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Lehao Zhang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China
| | - Subhas C Kundu
- I3Bs Research Institute on Biomaterials, Biodegrabilities, and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Barco 4805017, Portugal
| | - Shenzhou Lu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People's Republic of China.
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3
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Qi Z, Yan Z, Tan G, Jia T, Geng Y, Shao H, Kundu SC, Lu S. Silk Fibroin Microneedles for Transdermal Drug Delivery: Where Do We Stand and How Far Can We Proceed? Pharmaceutics 2023; 15:pharmaceutics15020355. [PMID: 36839676 PMCID: PMC9964088 DOI: 10.3390/pharmaceutics15020355] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/11/2023] [Accepted: 01/18/2023] [Indexed: 01/24/2023] Open
Abstract
Microneedles are a patient-friendly technique for delivering drugs to the site of action in place of traditional oral and injectable administration. Silk fibroin represents an interesting polymeric biomaterial because of its mechanical properties, thermal stability, biocompatibility and possibility of control via genetic engineering. This review focuses on the critical research progress of silk fibroin microneedles since their inception, analyzes in detail the structure and properties of silk fibroin, the types of silk fibroin microneedles, drug delivery applications and clinical trials, and summarizes the future development trend in this field. It also proposes the future research direction of silk fibroin microneedles, including increasing drug loading doses and enriching drug loading types as well as exploring silk fibroin microneedles with stimulation-responsive drug release functions. The safety and effectiveness of silk fibroin microneedles should be further verified in clinical trials at different stages.
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Affiliation(s)
- Zhenzhen Qi
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Zheng Yan
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Guohongfang Tan
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Tianshuo Jia
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Yiyu Geng
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Huiyan Shao
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Subhas C. Kundu
- 3Bs Research Group, I3Bs Research Institute on Biomaterials, Biodegrabilities, and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Guimaraes, 4805-017 Barco, Portugal
| | - Shenzhou Lu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
- Correspondence: ; Tel.: +86-512-67061152
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4
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Wongkrongsak S, Piroonpan T, Coqueret X, Pasanphan W. Radiation-processed silk fibroin micro- /nano-gels as promising antioxidants: Electron beam treatment and physicochemical characterization. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Wang Y, Boero G, Zhang X, Brugger J. Nanopore Generation in Biodegradable Silk/Magnetic Nanoparticle Membranes by an External Magnetic Field for Implantable Drug Delivery. ACS APPLIED MATERIALS & INTERFACES 2022; 14:40418-40426. [PMID: 36036484 PMCID: PMC9460430 DOI: 10.1021/acsami.2c10603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023]
Abstract
Implantable devices for localized and controlled drug release are important, e.g., for therapies of cancer and chronic pain. However, most of the existing active implants are limited by the usage of nonbiodegradable materials; thus, surgery is needed to extract them after the treatment, which leads to secondary damage. Here, we show a fully biodegradable composite membrane made from silk fibroin and magnetic nanoparticles (MNPs). The membrane porosity can be remotely modified by an alternating magnetic field, which opens nanopores by local heating of MNPs in the composite allowing a liquid to diffuse through them. The stability of the silk membrane in water can be prolonged up to several months by increasing its β-sheet content through ethanol annealing. We present the following original findings. (a) Nanopores can be generated inside the silk/MNP composite membrane by exposing it to an external alternating magnetic field. (b) A longer exposure time results in more nanopore sites. (c) The controllable release of rhodamine B dye is achieved by tuning the period of exposure to the magnetic field. The obtained results demonstrate the suitability of the investigated silk/MNP composite membrane as a potential functional material for implantable drug delivery.
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Affiliation(s)
- Ya Wang
- Food
Science and Technology Program, Beijing
Normal University-Hong Kong Baptist University United International
College, 519087 Zhuhai, China
- Microsystems
Laboratory, École Polytechnique Fédérale
de Lausanne, 1015 Lausanne, Switzerland
| | - Giovanni Boero
- Microsystems
Laboratory, École Polytechnique Fédérale
de Lausanne, 1015 Lausanne, Switzerland
| | - Xiaosheng Zhang
- School
of Electronic Science and Engineering, University
of Electronic Science and Technology of China, 611731 Chengdu, China
| | - Juergen Brugger
- Microsystems
Laboratory, École Polytechnique Fédérale
de Lausanne, 1015 Lausanne, Switzerland
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6
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Zhang X, Hang Y, Ding Z, Xiao L, Cheng W, Lu Q. Macroporous Silk Nanofiber Cryogels with Tunable Properties. Biomacromolecules 2022; 23:2160-2169. [PMID: 35443774 DOI: 10.1021/acs.biomac.2c00222] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cryogels are widely used in tissue regeneration due to their porous structures and friendly hydrogel performance. Silk-based cryogels were developed but failed to exhibit desirable tunable properties to adapt various biomedical applications. Here, amorphous short silk nanofibers (SSFs) were introduced to fabricate silk cryogels with versatile cues. Compared to previous silk cryogels, the SSF cryogels prepared under same conditions showed significantly enhanced mechanical properties. The microporous cryogels were achieved under lower silk concentrations, confirming better tunability. Versatile cryogels with the modulus in the range of 0.5-283.7 kPa were developed through adjusting silk concentration and crosslinking conditions, superior to previous silk cryogel systems. Besides better cytocompatibility, the SSF cryogels were endowed with effective mechanical cues to control osteogenetic differentiation behaviors of BMSCs. The mechanical properties could be further regulated finely through the introduction of β-sheet-rich silk nanofibers (SNFs), which suggested possible optimization of mechanical niches. Bioactive cargo-laden SNFs were introduced to the SSF cryogel systems, bringing biochemical signals without the compromise of mechanical properties. Versatile SNF-based cryogels with different physical and biological cues were developed here to facilitate the applications in various tissue engineering.
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Affiliation(s)
- Xiaoyi Zhang
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People's Republic of China
| | - Yingjie Hang
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People's Republic of China
| | - Zhaozhao Ding
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People's Republic of China
| | - Liying Xiao
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People's Republic of China
| | - Weinan Cheng
- Department of Orthopedics, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361000, People's Republic of China
| | - Qiang Lu
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People's Republic of China
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7
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Wang X, Liu P, Wu Q, Zheng Z, Xie M, Chen G, Yu J, Wang X, Li G, Kaplan D. Sustainable Antibacterial and Anti-Inflammatory Silk Suture with Surface Modification of Combined-Therapy Drugs for Surgical Site Infection. ACS APPLIED MATERIALS & INTERFACES 2022; 14:11177-11191. [PMID: 35192338 DOI: 10.1021/acsami.2c00106] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Silk sutures with antibacterial and anti-inflammatory functions were developed for sustained dual-drug delivery to prevent surgical site infections (SSIs). The silk sutures were prepared with core-shell structures braided from degummed silk filaments and then coated with a silk fibroin (SF) layer loaded with berberine (BB) and artemisinin (ART). Both the rapid release of drugs to prevent initial biofilm formation and the following sustained release to maintain effective concentrations for more than 42 days were demonstrated. In vitro assays using human fibroblasts (Hs 865.Sk) demonstrated cell proliferation on the materials, and hemolysis was 2.4 ± 0.8%, lower than that required by ISO 10993-4 standard. The sutures inhibited platelet adhesion and promoted collagen deposition and blood vessel formation. In vivo assessments using Sprague-Dawley (SD) rats indicated that the coating reduced the expression of pro-inflammatory cytokines interleukin-10 (IL-10) and tumor necrosis factor-α (TNF-α), shortening the inflammatory period and promoting angiogenesis. The results demonstrated that these new sutures exhibited stable structures, favorable biocompatibility, and sustainable antibacterial and anti-inflammatory functions with potential for surgical applications.
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Affiliation(s)
- Xuchen Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Peixin Liu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
- Orthopedic Institute, Soochow University, Suzhou 215006, China
| | - Qinting Wu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Zhaozhu Zheng
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Maobin Xie
- Department of Biomedical Engineering, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Guoqiang Chen
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Jia Yu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
- Orthopedic Institute, Soochow University, Suzhou 215006, China
| | - Xiaoqin Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Gang Li
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - David Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
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8
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Abstract
The use of saliva as a diagnostic biofluid has been increasing in recent years, thanks to the identification and validation of new biomarkers and improvements in test accuracy, sensitivity, and precision that enable the development of new noninvasive and cost-effective devices. However, the lack of standardized methods for sample collection, treatment, and storage contribute to the overall variability and lack of reproducibility across analytical evaluations. Furthermore, the instability of salivary biomarkers after sample collection hinders their translation into commercially available technologies for noninvasive monitoring of saliva in home settings. The present review aims to highlight the status of research on the challenges of collecting and using diagnostic salivary samples, emphasizing the methodologies used to preserve relevant proteins, hormones, genomic, and transcriptomic biomarkers during sample handling and analysis.
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Affiliation(s)
- Luciana d'Amone
- Silklab, Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Giusy Matzeu
- Silklab, Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Fiorenzo G Omenetto
- Silklab, Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States.,Department of Electrical and Computer Engineering, Tufts University, Medford, Massachusetts 02155, United States.,Department of Physics, Tufts University, Medford, Massachusetts 02155, United States.,Laboratory for Living Devices, Tufts University, Medford, Massachusetts 02155, United States
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9
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Yeo J, Lee J, Lee S, Kim WJ. Polymeric Antioxidant Materials for Treatment of Inflammatory Disorders. ADVANCED THERAPEUTICS 2021. [DOI: 10.1002/adtp.202000270] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jiwon Yeo
- Department of Chemistry Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Junseok Lee
- Department of Chemistry Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
- OmniaMed Co, Ltd Pohang 37673 Republic of Korea
| | - Sanggi Lee
- School of Interdisciplinary Bioscience and Bioengineering (I‐Bio) Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Won Jong Kim
- Department of Chemistry Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
- OmniaMed Co, Ltd Pohang 37673 Republic of Korea
- School of Interdisciplinary Bioscience and Bioengineering (I‐Bio) Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
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10
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Strong biodegradable cellulose materials with improved crystallinity via hydrogen bonding tailoring strategy for UV blocking and antioxidant activity. Int J Biol Macromol 2020; 164:27-36. [DOI: 10.1016/j.ijbiomac.2020.07.100] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/09/2020] [Accepted: 07/09/2020] [Indexed: 12/29/2022]
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11
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Wu J, Guo W, Zhang L, Wang Y, Liu L, Wang W, Sun Y, Tao J, Wang X. One-step preparation and characterization of silk nano- and microspheres. Polym J 2020. [DOI: 10.1038/s41428-020-0392-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Wang Y, Cheng Q, Liu J, Tariq Z, Zheng Z, Li G, Kaplan DL, Wang X. Tuning Microcapsule Shell Thickness and Structure with Silk Fibroin and Nanoparticles for Sustained Release. ACS Biomater Sci Eng 2020; 6:4583-4594. [PMID: 33455196 DOI: 10.1021/acsbiomaterials.0c00835] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microcapsules have attracted widespread interest for their unique properties in encapsulation, protection, and separation of active ingredients from the surrounding environment. However, microcapsule carriers with controllable shell thickness, permeability, good mechanical properties, and thermostability are challenging to obtain. Herein, robust and versatile composite microcapsules were fabricated using SiO2 nanoparticle-stabilized (Pickering) oil emulsions as core templates, while silk fibroin (SF) was assembled at the oil/water interface. This process resulted in the formation of physically and chemically stable microcapsules with a thick (∼800 nm) shell that protected the encapsulated ingredient from high shear forces and high temperatures during spray-drying. SiO2 nanoparticles were randomly distributed in the shell matrix after preparation, making the microcapsules mechanically robust (4.48 times higher than control samples prepared using surfactant Tween 80 instead of the SiO2 nanoparticles), as well as thermostable (retained shape to 900 °C). The microcapsules displayed tunable drug release by adjusting the SF content in the shell. Under optimal conditions (weight ratio of SiO2/SF = 7:10, corn oil content about 55 wt %), a model drug (curcumin) was encapsulated in the SF microcapsules with an encapsulation efficiency up to 95%. The in vitro drug release from these SF microcapsules lasted longer than control microcapsules, demonstrating the capability of these novel microcapsules in sustaining drug release.
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Affiliation(s)
- Yongfeng Wang
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, P. R. China
| | - Qingqing Cheng
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
| | - Jian Liu
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, P. R. China
| | - Zeeshan Tariq
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, P. R. China
| | - Zhaozhu Zheng
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, P. R. China
| | - Gang Li
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, P. R. China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Xiaoqin Wang
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, P. R. China
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13
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Osorio M, Martinez E, Naranjo T, Castro C. Recent Advances in Polymer Nanomaterials for Drug Delivery of Adjuvants in Colorectal Cancer Treatment: A Scientific-Technological Analysis and Review. Molecules 2020; 25:E2270. [PMID: 32408538 PMCID: PMC7288015 DOI: 10.3390/molecules25102270] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 04/30/2020] [Accepted: 05/01/2020] [Indexed: 12/22/2022] Open
Abstract
Colorectal cancer (CRC) is the type with the second highest morbidity. Recently, a great number of bioactive compounds and encapsulation techniques have been developed. Thus, this paper aims to review the drug delivery strategies for chemotherapy adjuvant treatments for CRC, including an initial scientific-technological analysis of the papers and patents related to cancer, CRC, and adjuvant treatments. For 2018, a total of 167,366 cancer-related papers and 306,240 patents were found. Adjuvant treatments represented 39.3% of the total CRC patents, indicating the importance of adjuvants in the prognosis of patients. Chemotherapy adjuvants can be divided into two groups, natural and synthetic (5-fluorouracil and derivatives). Both groups can be encapsulated using polymers. Polymer-based drug delivery systems can be classified according to polymer nature. From those, anionic polymers have garnered the most attention, because they are pH responsive. The use of polymers tailors the desorption profile, improving drug bioavailability and enhancing the local treatment of CRC via oral administration. Finally, it can be concluded that antioxidants are emerging compounds that can complement today's chemotherapy treatments. In the long term, encapsulated antioxidants will replace synthetic drugs and will play an important role in curing CRC.
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Affiliation(s)
- Marlon Osorio
- School of Engineering, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín 050031, Colombia; (M.O.); (E.M.)
| | - Estefanía Martinez
- School of Engineering, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín 050031, Colombia; (M.O.); (E.M.)
| | - Tonny Naranjo
- School of Health Sciences, Universidad Pontificia Bolivariana, Calle 78 B # 72 A-109, Medellín 050034, Colombia;
- Medical and Experimental Mycology Group, Corporación para Investigaciones Biológicas, Carrera 72 A # 78 B-141, Medellín 050034, Colombia
| | - Cristina Castro
- School of Engineering, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín 050031, Colombia; (M.O.); (E.M.)
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14
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Hu B, Yu S, Shi C, Gu J, Shao Y, Chen Q, Li Y, Mezzenga R. Amyloid-Polyphenol Hybrid Nanofilaments Mitigate Colitis and Regulate Gut Microbial Dysbiosis. ACS NANO 2020; 14:2760-2776. [PMID: 31961657 DOI: 10.1021/acsnano.9b09125] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It is a desirable and powerful strategy to precisely fabricate functional soft matter through self-assembly of molecular building blocks across a range of length scales. Proteins, nucleic acids, and polyphenols are the self-assemblers ubiquitous in nature. Assembly of proteins into flexible biocolloids, amyloid fibrils with high aspect ratio, has emerged as an unchallenged templating strategy for high-end technological materials and bio-nanotechnologies. We demonstrate the ability of these fibrils to support the deposition and self-assembly of polyphenols into hybrid nanofilaments and functional macroscopic hydrogels made thereof. The length scale of the substance that amyloid fibrils can attach with acting as the building templates was extended from nanometer down to sub-nanometer. Significantly increased loading capacities of polyphenols (up to 4.0 wt %) compared to that of other delivery systems and improved stability were realized. After oral administration, the hydrogels could transport from the stomach to the small intestine and finally to the gut (cecum, colon, rectum), with a long retention time in the colon. Oral administration of the hydrogels significantly ameliorated colitis in a mouse model, promoted intestinal barrier function, suppressed the pro-inflammatory mRNA expression, and very significantly (P < 0.01) regulated gut microbial dysbiosis. Specifically, it reduced the abundance of normally enriched operational taxonomic units related to colitis, especially targeting facultative anaerobes of the phylum Proteobacteria, such as Aestuariispira and Escherichia. The short-chain fatty acid metabolites were enriched. Combined with their nontoxic nature observed in this long-term study in mice, the obtained amyloid-polyphenol gels have high application potentials for gastrointestinal diseases by "drugging the microbiome".
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Affiliation(s)
- Bing Hu
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang, Nanjing, Jiangsu 210095, P.R. China
| | - Shijie Yu
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang, Nanjing, Jiangsu 210095, P.R. China
| | - Ce Shi
- Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
| | - Jie Gu
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, Jiangsu 210093, P.R. China
| | - Yun Shao
- Geriatric Department of Gastroenterology, Jiangsu People's Hospital, Nanjing, Jiangsu 210029, P.R. China
| | - Quan Chen
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
| | - Yunqi Li
- Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
| | - Raffaele Mezzenga
- Department of Health Sciences and Technology, ETH Zurich, Schmelzbergstrasse 9, Zurich 8092, Switzerland
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15
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Wang Y, Zheng Z, Cheng Q, Kaplan DL, Li G, Wang X. Ductility and Porosity of Silk Fibroin Films by Blending with Glycerol/Polyethylene Glycol and Adjusting the Drying Temperature. ACS Biomater Sci Eng 2020; 6:1176-1185. [PMID: 33464844 DOI: 10.1021/acsbiomaterials.9b01567] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ductility and porosity of biofunctional films (BFFs) are critical properties for mechanical compliance and intercellular communication in tissue engineering. However, it remains a significant challenge to integrate these two key properties into BFFs. Herein, silk fibroin (SF) films with tunable ductility and porosity were prepared by adjusting the protein self-assembly process through combinations with glycerol (Gly) and polyethylene glycol 400 (PEG400) and regulating the film-casting temperature. Typically, among various conditions screened, the BFFs with a mass ratio of SF/PEG400/Gly of 10:5:3 (SPG1053) prepared at 4 °C exhibited remarkable ductility with a tensile strength of 2.7 ± 0.2 MPa and an elongation at break of 164.24 ± 24.20%, superior to films prepared from SF alone, SF/Gly, or SF/PEG400, demonstrating a synergistic plasticizing effect. Furthermore, the SPG1053 films prepared at 4 °C had a permeation efficiency of 56.32 ± 0.85% for fluorescently labeled dextran (dextran-TMR, MW: 10 kDa) after 204 h, significantly higher than films prepared at 20 °C (34.67 ± 3.63%) and 60 °C (15.4 ± 1.16%). Finally, the ductile and porous SPG1053 had excellent cell compatibility with human fibroblasts (Hs 865.SK). Given the demonstrated ductility, molecule-sieving property, and cytocompatibility, these new SPG films should offer new options for cell culture and tissue engineering.
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Affiliation(s)
- Yongfeng Wang
- National Engineering Laboratory for Modern Silk, Soochow University, Suzhou 215123, P.R. China
| | - Zhaozhu Zheng
- National Engineering Laboratory for Modern Silk, Soochow University, Suzhou 215123, P.R. China
| | - Qingqing Cheng
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, P.R. China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - Gang Li
- National Engineering Laboratory for Modern Silk, Soochow University, Suzhou 215123, P.R. China
| | - Xiaoqin Wang
- National Engineering Laboratory for Modern Silk, Soochow University, Suzhou 215123, P.R. China
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16
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Zhang X, Zhang Z, Xiao L, Ding Z, He J, Lu G, Lu Q, Kaplan DL. Natural Nanofiber Shuttles for Transporting Hydrophobic Cargo into Aqueous Solutions. Biomacromolecules 2020; 21:1022-1030. [PMID: 31935078 DOI: 10.1021/acs.biomac.9b01739] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hydrophobic biomolecules realize their functions in vivo in aqueous environments, often through a delicate balance of amphiphilicity and chaperones. Introducing exogenous hydrophobic biomolecules into in vivo aqueous systems is a challenge in drug delivery and regenerative medicine, where labile linkers, carriers, and fusions or chimeric molecules are often designed to facilitate such aqueous interfaces. Here, we utilize naturally derived silk nanofiber shuttles with the capacity to transport hydrophobic cargos directly into aqueous solutions. These nanofibers disperse in organic solvents and in aqueous solutions because of their inherent amphiphilicity, with enriched hydrophobicity and strategically interspersed negatively charged groups. Hydrophobic molecules loaded on these shuttles in organic solvent-water systems separated from the solvent after centrifugation. These concentrated hydrophobic molecule-loaded nanofibers could then be dispersed into aqueous solution directly without modification. These shuttle systems were effective for different hydrophobic molecules such as drugs, vitamins, and dyes. Improved biological stability and functions of hydrophobic cargos after loading on these nanofibers suggest potential applications in drug delivery, cosmetology, medical diagnosis, and related health fields, with a relatively facile process.
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Affiliation(s)
- Xiaoyi Zhang
- Department of Burns and Plastic Surgery , The Affiliated Hospital of Jiangnan University , Wuxi 214041 , China.,National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology , Soochow University , Suzhou 215123 , China
| | - Zhen Zhang
- Department of Dermatology, Shanghai Ninth People's Hospital , Shanghai Jiaotong University School of Medicine , Shanghai 200011 , China
| | - Liying Xiao
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology , Soochow University , Suzhou 215123 , China
| | - Zhaozhao Ding
- Department of Burns and Plastic Surgery , The Affiliated Hospital of Jiangnan University , Wuxi 214041 , China
| | - Jiuyang He
- CAS Engineering Laboratory for Nanozyme, Key Laboratory of Protein and Peptide Pharmaceutical, Institute of Biophysics , Chinese Academy of Sciences , Beijing 100101 , China
| | - Guozhong Lu
- Department of Burns and Plastic Surgery , The Affiliated Hospital of Jiangnan University , Wuxi 214041 , China
| | - Qiang Lu
- Department of Burns and Plastic Surgery , The Affiliated Hospital of Jiangnan University , Wuxi 214041 , China.,National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology , Soochow University , Suzhou 215123 , China
| | - David L Kaplan
- Department of Biomedical Engineering , Tufts University , Medford , Massachusetts 02155 , United States
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17
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Song P, Zhang W, Xu C, Guan H, Tu Y, Wu G. Effects of silkworm variety on the mechanical and structural properties of silk. ACTA ACUST UNITED AC 2019. [DOI: 10.1080/22243682.2018.1556334] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Peng Song
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, P.R. China
| | - Wei Zhang
- School of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
| | - Chen Xu
- School of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
| | - Huaiyang Guan
- School of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
| | - Yu Tu
- School of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
| | - Guohua Wu
- School of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
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18
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Roohaniesfahani I, Wang J, No YJ, de Candia C, Miao X, Lu Z, Shi J, Kaplan DL, Jiang X, Zreiqat H. Modulatory effect of simultaneously released magnesium, strontium, and silicon ions on injectable silk hydrogels for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 94:976-987. [PMID: 30423786 DOI: 10.1016/j.msec.2018.10.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 08/08/2018] [Accepted: 10/13/2018] [Indexed: 01/31/2023]
Abstract
Injectable silk hydrogels are ideal carriers of therapeutic agents due to their biocompatibility and low immunogenicity. Injectable silk hydrogels for bone regeneration have been previously developed but often utilize expensive biologics. In this study, we have developed an injectable silk composite incorporated with a triphasic ceramic called MSM-10 (54 Mg2SiO4, 36 Si3Sr5 and 10 MgO (wt%)) capable of simultaneously releasing magnesium, silicon, and strontium ions into its environment. These ions have been previously reported to possess therapeutic effects for bone regeneration. MSM-10 particles were incorporated into the silk hydrogels at various weight percentages [0.1 (SMH-0.1), 0.6 (SMH-0.6), 1 (SMH-1) and 2 (SMH-2)]. The effects of the released ions on the physicochemical and biological properties of the silk hydrogel were comprehensively evaluated. Increased MSM-10 loading was found to hinder the gelation kinetics of the silk hydrogel through the reduction of beta-sheet phase formation, which in turn affected the required sonication time for gelation, compressive strength, force of injection, microstructure and in vitro degradation rate. Primary human osteoblasts seeded on SMH-0.6 demonstrated increased proliferation and early alkaline phosphatase activity, as well as enhanced osteogenic gene expression compared to pure silk hydrogel and SMH-0.1. In vivo results in subcutaneous mouse models showed both decreased fibrous capsule formation and increased number of new blood vessels around the injected SMH-0.1 and SMH-0.6 implants compared to pure silk hydrogels. The results in this study indicate that the ions released from MSM-10 is able to influence the physicochemical and biological properties of silk hydrogels, and SMH-0.6 in particular shows promising properties for bone regeneration.
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Affiliation(s)
- Iman Roohaniesfahani
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia.
| | - Jie Wang
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Young Jung No
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia
| | - Christian de Candia
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia
| | - Xinchao Miao
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Zufu Lu
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia
| | - Jeffrey Shi
- School of Chemical and Biomolecular Engineering, Faculty of Engineering and IT, University of Sydney, Sydney, Australia
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
| | - Xinquan Jiang
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China.
| | - Hala Zreiqat
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia.
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19
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Dao AT, Shimokata J, Takeuchi K, Nakayama K, Taniike T. Stabilization of recombinant spider silk in thermo-oxidative degradation: High-throughput screening for antioxidants. Polym Degrad Stab 2018. [DOI: 10.1016/j.polymdegradstab.2018.04.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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20
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Zhou Y, Chen C, Pan J, Deng X, Wang J. Epigallocatechin gallate can attenuate human alveolar epithelial cell injury induced by alpha-haemolysin. Microb Pathog 2018; 115:222-226. [DOI: 10.1016/j.micpath.2017.12.054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/18/2017] [Accepted: 12/19/2017] [Indexed: 10/18/2022]
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21
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Shiekh PA, Singh A, Kumar A. Engineering Bioinspired Antioxidant Materials Promoting Cardiomyocyte Functionality and Maturation for Tissue Engineering Application. ACS APPLIED MATERIALS & INTERFACES 2018; 10:3260-3273. [PMID: 29303551 DOI: 10.1021/acsami.7b14777] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Oxidative stress plays an important role in various pathological conditions, such as wound healing, inflammation, myocardial infarction, and biocompatibility of the materials. Antioxidant polymers to attenuate oxidative stress is an emerging field of biomaterial research with a huge impact in the field of tissue engineering and regenerative medicine. We describe here the fabrication and evaluation of an elastomeric antioxidant polyurethane (PUAO) for tissue engineering applications. Uniaxial and cyclic tensile testing, thermal analysis, degradation, cytotoxicity and antioxidant analysis was carried out. An in vitro oxidative stress model demonstrated that PUAO reduced intracellular oxidative stress in H9C2 cardiomyocytes (p < 0.05) and attenuated reactive oxygen species (ROS) induced cell death (p < 0.001). Under simulated ischemic reperfusion, PUAO could rescue hypoxia induced cell death. Further as a proof of concept, neonatal rat cardiomyocytes cultured on PUAO film displayed synchronous beating with mature phenotype showing expression of cardiac specific α-actinin, troponin-T, and connexin-43 proteins. Intracellular calcium transients established the functionality of cultured cardiomyocytes on PUAO film. Our study demonstrated the potential of this biomaterial to be developed into tissue engineered scaffold to attenuate oxidative stress for treatment of diseased conditions with increased oxidative stress, such as cardiovascular diseases, chronic wound healing, and myocardial infarction.
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Affiliation(s)
- Parvaiz A Shiekh
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur , Kanpur-208016, Uttar Pradesh, India
| | - Anamika Singh
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur , Kanpur-208016, Uttar Pradesh, India
| | - Ashok Kumar
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur , Kanpur-208016, Uttar Pradesh, India
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22
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Guo C, Zhang J, Wang X, Nguyen AT, Liu XY, Kaplan DL. Comparative Study of Strain-Dependent Structural Changes of Silkworm Silks: Insight into the Structural Origin of Strain-Stiffening. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1702266. [PMID: 29076647 DOI: 10.1002/smll.201702266] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/04/2017] [Indexed: 06/07/2023]
Abstract
Structure-property relationships of silk is an intriguing topic for silk-based biomaterials research since these features are related to biomimicking the processing in natural silk fiber formation which results in excellent mechanical properties. Strain-stiffening is common for spider silks and nonmulberry silkworm silks. However, the structural origin of strain-stiffening remains unclear. In this paper, the strain-dependent structural change of Antheraea pernyi silkworm silk is studied by X-ray fiber diffraction and Fourier transform infrared spectroscopy under stretching. Based on a combination of mechanical and structural analysis, the molecular origins of strain-stiffening in A. pernyi silk were determined. The relatively high content of the β-sheets within the amorphous domains in A. pernyi silk is responsible for strain-stiffening, where "molecular spindles" enhance the extensibility and toughness of the fiber.
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Affiliation(s)
- Chengchen Guo
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
| | - Jin Zhang
- Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, VIC, 3216, Australia
| | - Xungai Wang
- Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, VIC, 3216, Australia
| | - Anh Tuan Nguyen
- Department of Physics, University of Singapore, Singapore, 117542, Singapore
| | - Xiang Yang Liu
- Department of Physics, University of Singapore, Singapore, 117542, Singapore
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
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23
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Wu J, Xie X, Zheng Z, Li G, Wang X, Wang Y. Effect of pH on polyethylene glycol (PEG)-induced silk microsphere formation for drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 80:549-557. [DOI: 10.1016/j.msec.2017.05.072] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 05/04/2017] [Accepted: 05/13/2017] [Indexed: 10/19/2022]
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24
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Manchineella S, Voshavar C, Govindaraju T. Radical-Scavenging Antioxidant Cyclic Dipeptides and Silk Fibroin Biomaterials. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700597] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Shivaprasad Manchineella
- Bioorganic Chemistry Laboratory; New Chemistry Unit; Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR); 560064 Jakkur P. O., Bengaluru Karnataka India
| | - Chandrashekhar Voshavar
- Bioorganic Chemistry Laboratory; New Chemistry Unit; Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR); 560064 Jakkur P. O., Bengaluru Karnataka India
| | - Thimmaiah Govindaraju
- Bioorganic Chemistry Laboratory; New Chemistry Unit; Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR); 560064 Jakkur P. O., Bengaluru Karnataka India
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25
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Yang L, Zheng Z, Qian C, Wu J, Liu Y, Guo S, Li G, Liu M, Wang X, Kaplan DL. Curcumin-functionalized silk biomaterials for anti-aging utility. J Colloid Interface Sci 2017; 496:66-77. [DOI: 10.1016/j.jcis.2017.01.115] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 01/30/2017] [Accepted: 01/31/2017] [Indexed: 10/20/2022]
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26
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Song M, Teng Z, Li M, Niu X, Wang J, Deng X. Epigallocatechin gallate inhibits Streptococcus pneumoniae virulence by simultaneously targeting pneumolysin and sortase A. J Cell Mol Med 2017; 21:2586-2598. [PMID: 28402019 PMCID: PMC5618700 DOI: 10.1111/jcmm.13179] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 02/24/2017] [Indexed: 01/11/2023] Open
Abstract
Streptococcus pneumoniae (pneumococcus), the causative agent of several human diseases, possesses numerous virulence factors associated with pneumococcal infection and pathogenesis. Pneumolysin (PLY), an important virulence factor, is a member of the cholesterol-dependent cytolysin family and has cytolytic activity. Sortase A (SrtA), another crucial pneumococcal virulence determinate, contributes greatly to the anchoring of many virulence-associated surface proteins to the cell wall. In this study, epigallocatechin gallate (EGCG), a natural compound with little known antipneumococcal activity, was shown to directly inhibit PLY-mediated haemolysis and cytolysis by blocking the oligomerization of PLY and simultaneously reduce the peptidase activity of SrtA. The biofilm formation, production of neuraminidase A (NanA, the pneumococcal surface protein anchored by SrtA), and bacterial adhesion to human epithelial cells (Hep2) were inhibited effectively when S. pneumoniae D39 was cocultured with EGCG. The results from molecular dynamics simulations and mutational analysis confirmed the interaction of EGCG with PLY and SrtA, and EGCG binds to Glu277, Tyr358, and Arg359 in PLY and Thr169, Lys171, and Phe239 in SrtA. In vivo studies further demonstrated that EGCG protected mice against S. pneumoniae pneumonia. Our results imply that EGCG is an effective inhibitor of both PLY and SrtA and that an antivirulence strategy that directly targets PLY and SrtA using EGCG is a promising therapeutic option for S. pneumoniae pneumonia.
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Affiliation(s)
- Meng Song
- The First Hospital and Institute of Infection and Immunity, Jilin University, Changchun, China.,Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Zihao Teng
- The First Hospital and Institute of Infection and Immunity, Jilin University, Changchun, China.,Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Meng Li
- The First Hospital and Institute of Infection and Immunity, Jilin University, Changchun, China.,Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Xiaodi Niu
- The First Hospital and Institute of Infection and Immunity, Jilin University, Changchun, China.,Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Jianfeng Wang
- The First Hospital and Institute of Infection and Immunity, Jilin University, Changchun, China.,Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Xuming Deng
- The First Hospital and Institute of Infection and Immunity, Jilin University, Changchun, China
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