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Shazly T, Uline M, Webb C, Pederson B, Eberth JF, Kolachalama VB. Novel Payloads to Mitigate Maladaptive Inward Arterial Remodeling in Drug-Coated Balloon Therapy. J Biomech Eng 2023; 145:121004. [PMID: 37542712 PMCID: PMC10578076 DOI: 10.1115/1.4063122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/03/2023] [Accepted: 08/03/2023] [Indexed: 08/07/2023]
Abstract
Drug-coated balloon therapy is a minimally invasive endovascular approach to treat obstructive arterial disease, with increasing utilization in the peripheral circulation due to improved outcomes as compared to alternative interventional modalities. Broader clinical use of drug-coated balloons is limited by an incomplete understanding of device- and patient-specific determinants of treatment efficacy, including late outcomes that are mediated by postinterventional maladaptive inward arterial remodeling. To address this knowledge gap, we propose a predictive mathematical model of pressure-mediated femoral artery remodeling following drug-coated balloon deployment, with account of drug-based modulation of resident vascular cell phenotype and common patient comorbidities, namely, hypertension and endothelial cell dysfunction. Our results elucidate how postinterventional arterial remodeling outcomes are altered by the delivery of a traditional anti-proliferative drug, as well as by codelivery with an anti-contractile drug. Our findings suggest that codelivery of anti-proliferative and anti-contractile drugs could improve patient outcomes following drug-coated balloon therapy, motivating further consideration of novel payloads in next-generation devices.
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Affiliation(s)
- Tarek Shazly
- College of Engineering and Computing, Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208; College of Engineering and Computing, Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208; Cardiovascular Translational Research Center, University of South Carolina, Columbia, SC 29208
| | - Mark Uline
- College of Engineering and Computing, Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208; Cardiovascular Translational Research Center, University of South Carolina, Columbia, SC 29208; College of Engineering and Computing, Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208
| | - Clinton Webb
- College of Engineering and Computing, Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208; Cardiovascular Translational Research Center, University of South Carolina, Columbia, SC 29208; School of Medicine, Department of Cell Biology and Anatomy, University of South Carolina, Columbia, SC 29208
| | - Breanna Pederson
- College of Engineering and Computing, Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208
| | - John F. Eberth
- Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104
| | - Vijaya B. Kolachalama
- Department of Medicine, Boston University Chobanian & Avedisian School of Medicine, Boston, MA 02118; Department of Computer Science and Faculty of Computing and Data Sciences, Boston University, Boston, MA 02115
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Bhat S, Chowdhary R. Effect of Cissus quadrangularis Hydrogel on Enhancing Osseointegration of Titanium Implant to Bone: An In Vivo Study. J Contemp Dent Pract 2022; 23:582-588. [PMID: 36259295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 07/27/2022] [Indexed: 06/16/2023]
Abstract
AIM The aim of the study was to evaluate the osteogenic potential of Cissus quadrangularis (CQ) hydrogel in enhancing the osseointegration of titanium to the bone in an experimental rabbit model. MATERIALS AND METHODS Six adult male New Zealand white rabbits were used in this study. A total of 24 implants (12 coated test implants and 12 uncoated control implants) were placed in these 6 rabbits. A polyethylene glycol (PEG) hydrogel was prepared with the C. quadrangularis hydrogel in which the test implants were coated. Each rabbit was operated on both hind legs and one implant, each, was placed in the femur and tibia. Hence, one rabbit received four implants [two test implants (HG coated) and two control implants (uncoated)]. The animals were sacrificed after 4 weeks, and the specimens were histomorphometrically analyzed. The bone-to-implant contact (BIC) and the bone area fraction occupancy (BAFO) were calculated using Image J analysis. RESULTS The statistically analyzed values which were obtained by paired t-test, revealed that the average mean values were higher in the test implants (coated) than the control implants (uncoated). The BIC values of the test implants were not significantly different from the control implants in the case of both femur and tibia (p >0.05). The test implants showed significantly increased BAFO values in femur (p <0.05). However, the BAFO values of test implants in tibia did not vary significantly from the control implants. CONCLUSION Based on the findings of the study, the authors conclude that the coating of C. quadrangularis hydrogel enhances the osseointegration of titanium implants to bone. The further studies need to be designed to check the osseointegrative potential of C. quadrangularis. CLINICAL SIGNIFICANCE The findings of this study suggest that the C. quadrangularis hydrogel is a potent osteogenic material that can reduce the osseointegration period and thus enhance the patient compliance toward implant treatment.
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Affiliation(s)
- Srinidhi Bhat
- Department of Prosthodontics, RajaRajeswari Dental College & Hospital, Bengaluru, Karnataka, India, Phone: +91 8867768715, e-mail:
| | - Ramesh Chowdhary
- Department of Prosthodontics, RajaRajeswari Dental College & Hospital, Bengaluru, Karnataka, India
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Wei H, Song X, Liu P, Liu X, Yan X, Yu L. Antimicrobial coating strategy to prevent orthopaedic device-related infections: recent advances and future perspectives. Biomater Adv 2022; 135:212739. [PMID: 35929213 DOI: 10.1016/j.bioadv.2022.212739] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/24/2022] [Accepted: 02/25/2022] [Indexed: 06/15/2023]
Abstract
The rapid development of multidrug-resistant (MDR) bacteria and biofilm-related infections (BRIs) has urgently called for new strategies to combat severe orthopaedic device-related infections (ODRIs). Antimicrobial coating has emerged as a promising strategy in halting the incidence of ODRIs and treating ODRIs in long term. With the advancement of material science and biotechnology, numerous antimicrobial coatings have been reported in literature, showing superior antimicrobial and osteogenic functions. This review has specifically discussed the currently developed antimicrobial coatings in the perspective of drug release from the coating system, focusing on their realization of controlled and on demand antimicrobial agents release, as well as multi-functionality. Acknowledging the multidisciplinary nature of antimicrobial coating, the conceptual design, the deposition method and the therapeutic effect of the antimicrobial coatings have been described in detail and discussed critically. Particularly, the challenges and opportunities on the way toward the clinical translation of antimicrobial coatings have been highlighted.
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Affiliation(s)
- Huichao Wei
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xinyu Song
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
| | - Pengyan Liu
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xiaohu Liu
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xuefeng Yan
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Liangmin Yu
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
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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 Appl Mater 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Li G, Qiao H, Lin H, Wang R, Chen F, Li S, Yang W, Yin L, Cen X, Zhang Y, Cheng X, Wang AYC. Application of drug-coated balloons for intracranial atherosclerosis disease: a systematic review. Clin Neurol Neurosurg 2021; 213:107065. [PMID: 34991058 DOI: 10.1016/j.clineuro.2021.107065] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 11/21/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Although percutaneous transluminal angioplasty and stenting (PTAS) was an effective and safe alternative treatment for severe intracranial atherosclerosis disease (ICAD), the high rate of restenosis remained a major issue for this endovascular procedure. Recently, the application of drug-coated balloons (DCB) in ICAD was developed to reduce restenosis. This systematic review aimed to evaluate the efficacy and safety of DCB angioplasty for ICAD. METHODS We searched relevant databases for eligible studies enrolling ICAD patients treated with DCB. The event rates of restenosis and periprocedural complications in the follow-up period were pooled with random-/fixed-effect models using Freeman-Tukey double arcsine transformation. Heterogeneity tests and publication bias tests were performed. RESULTS Two hundred and twenty-four ICAD patients treated with DCB from 9 eligible studies were included. Rate of stenosis in the DCB arm before treatment was ranged from 62% to 90% and reported median follow-up was ranged from 3 to 10.7 months. The pooled incidence of restenosis were 5.7% (95% confidence interval [CI] 2.6%-9.7%; I2 = 0%, p = 0.516) and 5.9% for periprocedural complications (95% CI: 2.5-10.3%; I2 = 0%, p = 0.649) in follow-up term. CONCLUSION With the limitation of the low quality of the available evidence, angioplasty with DCB appears to be effective and safe in severe ICAD. Further larger randomized trials are needed to provide more definitive evidence and to address the ideal clinical context for their application.
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Affiliation(s)
- Guoming Li
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Hanzi Qiao
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Hao Lin
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Rongfei Wang
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Fajun Chen
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Shaoxue Li
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Weilin Yang
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Lei Yin
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Xuecheng Cen
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Yingguang Zhang
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
| | - Xiao Cheng
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China; Guangdong Provincial Chinese Emergency Key Laboratory, Guangzhou 510120, China; Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou 510006, China.
| | - Alvin Yi-Chou Wang
- Neurology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Dade Road No.111, Guangzhou, Guangdong 510120, China.
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Wang Y, Zou Y, Wu Y, Wei T, Lu K, Li L, Lin Y, Wu Y, Huang C, Zhang Y, Chen H, Yu Q. Universal Antifouling and Photothermal Antibacterial Surfaces Based on Multifunctional Metal-Phenolic Networks for Prevention of Biofilm Formation. ACS Appl Mater Interfaces 2021; 13:48403-48413. [PMID: 34610742 DOI: 10.1021/acsami.1c14979] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Biofilms formed from the pathogenic bacteria that attach to the surfaces of biomedical devices and implantable materials result in various persistent and chronic bacterial infections, posing serious threats to human health. Compared to the elimination of matured biofilms, prevention of the formation of biofilms is expected to be a more effective way for the treatment of biofilm-associated infections. Herein, we develop a facile method for endowing diverse substrates with long-term antibiofilm property by deposition of a hybrid film composed of tannic acid/Cu ion (TA/Cu) complex and poly(ethylene glycol) (PEG). In this system, the TA/Cu complex acts as a multifunctional building block with three different roles: (i) as a versatile "glue" with universal adherent property for substrate modification, (ii) as a photothermal biocidal agent for bacterial elimination under irradiation of near-infrared (NIR) laser, and (iii) as a potent linker for immobilization of PEG with inherent antifouling property to inhibit adhesion and accumulation of bacteria. The resulted hybrid film shows negligible cytotoxicity and good histocompatibility and could prevent biofilm formation for at least 15 days in vitro and suppress bacterial infection in vivo, showing great potential for practical applications to solve the biofilm-associated problems of biomedical materials and devices.
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Affiliation(s)
- Yaran Wang
- Institute for Cardiovascular Science and Department of Cardiovascular Surgery of the First Affiliated Hospital, Soochow University, Suzhou 215007, P. R. China
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yi Zou
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yong Wu
- Institute for Cardiovascular Science and Department of Cardiovascular Surgery of the First Affiliated Hospital, Soochow University, Suzhou 215007, P. R. China
| | - Ting Wei
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Kunyan Lu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Luohuizi Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yuancheng Lin
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yan Wu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Chaobo Huang
- Joint Laboratory of Advanced Biomedical Materials (NFU-UGent), College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Yanxia Zhang
- Institute for Cardiovascular Science and Department of Cardiovascular Surgery of the First Affiliated Hospital, Soochow University, Suzhou 215007, P. R. China
| | - Hong Chen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Qian Yu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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Sun P, Zhang L, Gu Y, Wei S, Wang Z, Li M, Wang W, Wang Z, Bai H. Immune checkpoint programmed death-1 mediates abdominal aortic aneurysm and pseudoaneurysm progression. Biomed Pharmacother 2021; 142:111955. [PMID: 34339918 DOI: 10.1016/j.biopha.2021.111955] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 07/18/2021] [Accepted: 07/20/2021] [Indexed: 12/20/2022] Open
Abstract
PURPOSE The causes and pathogenetic mechanisms underlying abdominal aortic aneurysms (AAAs) and pseudoaneurysms are not fully understood. We hypothesized that inhibiting programmed death-1 (PD-1) can decrease AAA and pseudoaneurysm formation in mouse and rat models. METHODS Human AAA samples were examined in conjunction with an adventitial calcium chloride (CaCl2) application mouse model and an aortic patch angioplasty rat model. Single-dose PD-1 antibody (4 mg/kg) or BMS-1 (PD-1 inhibitor-1) (1 mg/kg) was administered by intraperitoneal (IP) or intraluminal injection. In the intramural injection group, PD-1 antibody was injected after CaCl2 incubation. The rats were divided into three groups: (1) the control group was only decellularized without other special treatment, (2) the PD-1 antibody-coated patch group, and (3) the BMS-1 coated patch group. Patches implanted in the rat abdominal aorta were harvested on day 14 after implantation and analyzed. RESULTS Immunohistochemical analysis showed PD-1-positive cells, PD-1 and CD3, PD-1 and CD68, and PD-1 and α-actin co-expressed in the human AAA samples. Intraperitoneal (IP) injection or intraluminal injection of PD-1antibody/BMS-1 significantly inhibited AAA progression. PD-1 antibody and BMS-1 were each successfully conjugated to decellularized rat thoracic artery patches, respectively, by hyaluronic acid. Patches coated with either humanized PD-1 antibody or BMS-1 can also inhibit pseudoaneurysm progression and inflammatory cell infiltration. CONCLUSION PD-1 pathway inhibition may be a promising therapeutic strategy for inhibiting AAA and pseudoaneurysm progression.
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MESH Headings
- Aneurysm, False/drug therapy
- Aneurysm, False/metabolism
- Aneurysm, False/pathology
- Angioplasty/methods
- Animals
- Antibodies, Monoclonal, Humanized/pharmacology
- Antibodies, Monoclonal, Humanized/therapeutic use
- Aortic Aneurysm, Abdominal/drug therapy
- Aortic Aneurysm, Abdominal/metabolism
- Aortic Aneurysm, Abdominal/pathology
- B7-H1 Antigen/antagonists & inhibitors
- B7-H1 Antigen/metabolism
- Calcium Chloride/toxicity
- Coated Materials, Biocompatible/pharmacology
- Coated Materials, Biocompatible/therapeutic use
- Disease Models, Animal
- Disease Progression
- Humans
- Immune Checkpoint Inhibitors/pharmacology
- Immune Checkpoint Inhibitors/therapeutic use
- Injections, Intraperitoneal
- Lymphocytes/immunology
- Macrophages/immunology
- Male
- Mice
- Programmed Cell Death 1 Receptor/antagonists & inhibitors
- Programmed Cell Death 1 Receptor/immunology
- Programmed Cell Death 1 Receptor/metabolism
- Rats, Sprague-Dawley
- Rats
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Affiliation(s)
- Peng Sun
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Liwei Zhang
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Yulei Gu
- Emergency Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Shunbo Wei
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Zhiwei Wang
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Mingxing Li
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Wang Wang
- Key Vascular Physiology and Applied Research Laboratory of Zhengzhou City, 450002 Henan, China; Department of Physiology, Medical School of Zhengzhou University, 450002 Henan, China
| | - Zhiju Wang
- Department of Physiology, Medical School of Zhengzhou University, 450002 Henan, China
| | - Hualong Bai
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China; Key Vascular Physiology and Applied Research Laboratory of Zhengzhou City, 450002 Henan, China.
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Cozma V, Rosca I, Radulescu L, Martu C, Nastasa V, Varganici CD, Ursu EL, Doroftei F, Pinteala M, Racles C. Antibacterial Polysiloxane Polymers and Coatings for Cochlear Implants. Molecules 2021; 26:4892. [PMID: 34443480 PMCID: PMC8399987 DOI: 10.3390/molecules26164892] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/04/2021] [Accepted: 08/06/2021] [Indexed: 11/16/2022] Open
Abstract
Within this study, new materials were synthesized and characterized based on polysiloxane modified with different ratios of N-acetyl-l-cysteine (NAC) and crosslinked via UV-assisted thiol-ene addition, in order to obtain efficient membranes able to resist bacterial adherence and biofilm formation. These membranes were subjected to in vitro testing for microbial adherence against S. pneumoniae using standardized tests. WISTAR rats were implanted for 4 weeks with crosslinked siloxane samples without and with NAC. A set of physical characterization methods was employed to assess the chemical structure and morphological aspects of the new synthetized materials before and after contact with the microbiological medium.
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Affiliation(s)
- Vlad Cozma
- Department of Otorhinolaryngology, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (V.C.); (L.R.); (C.M.)
| | - Irina Rosca
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.R.); (C.-D.V.); (E.-L.U.); (F.D.)
| | - Luminita Radulescu
- Department of Otorhinolaryngology, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (V.C.); (L.R.); (C.M.)
| | - Cristian Martu
- Department of Otorhinolaryngology, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (V.C.); (L.R.); (C.M.)
| | - Valentin Nastasa
- Laboratory of Antimicrobial Chemotherapy, Faculty of Veterinary Medicine, “Ion Ionescu de la Brad” University of Life Sciences, 8 Sadoveanu Alley, 700489 Iasi, Romania;
| | - Cristian-Dragos Varganici
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.R.); (C.-D.V.); (E.-L.U.); (F.D.)
| | - Elena-Laura Ursu
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.R.); (C.-D.V.); (E.-L.U.); (F.D.)
| | - Florica Doroftei
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.R.); (C.-D.V.); (E.-L.U.); (F.D.)
| | - Mariana Pinteala
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.R.); (C.-D.V.); (E.-L.U.); (F.D.)
| | - Carmen Racles
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
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Zhao Z, Ma S, Wu C, Li X, Ma X, Hu H, Wu J, Wang Y, Liu Z. Chimeric Peptides Quickly Modify the Surface of Personalized 3D Printing Titanium Implants to Promote Osseointegration. ACS Appl Mater Interfaces 2021; 13:33981-33994. [PMID: 34260195 DOI: 10.1021/acsami.1c11207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Titanium (Ti) and titanium alloys have been widely used in the field of biomedicine. However, the unmatched biomechanics and poor bioactivities of conventional Ti implants usually lead to insufficient osseointegration. To tackle these challenges, it is critical to develop a novel Ti implant that meets the bioadaptive requirements for load-bearing critical bone defects. Notably, three-dimensional (3D)-printed Ti implants mimic the microstructure and mechanical properties of natural bones. Additionally, eco-friendly techniques based on inorganic-binding peptides have been applied to modify Ti surfaces. Herein, in our study, Ti surfaces were modified to reinforce osseointegration using chimeric peptides constructed by connecting W9, RP1P, and minTBP-1 directly or via (GP)4, respectively. PR1P is derived from the extracellular VEGF-binding domain of prominin-1, which increases the expression of VEGF and promotes the binding of VEGF to endothelial cells, thereby accelerating angiogenesis. W9 induces osteoblast differentiation in bone marrow mesenchymal stem cells and human mesenchymal stem cells to promote bone formation. Overall, chimeric peptides promote osseointegration by promoting angiogenesis and osteogenesis. Additionally, chimeric peptides with P3&4 were more effective than those with P1&2 in improving osseointegration, which might be ascribed to the capacity of P3&4 to provide a greater range for chimeric peptides to express their activity. This work successfully used chimeric peptides to modify 3D-Ti implant surfaces to improve osseointegration on the implant-bone surface.
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Affiliation(s)
- Zhezhe Zhao
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
| | - Shiqing Ma
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
| | - Chenxuan Wu
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
| | - Xuewen Li
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
| | - Xinying Ma
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
| | - Han Hu
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
| | - Jie Wu
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
| | - Yonglan Wang
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
| | - Zihao Liu
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, People's Republic of China
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10
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Narayan R, Gadag S, Cheruku SP, Raichur AM, Day CM, Garg S, Manandhar S, Pai KSR, Suresh A, Mehta CH, Nayak Y, Kumar N, Nayak UY. Chitosan-glucuronic acid conjugate coated mesoporous silica nanoparticles: A smart pH-responsive and receptor-targeted system for colorectal cancer therapy. Carbohydr Polym 2021; 261:117893. [PMID: 33766378 DOI: 10.1016/j.carbpol.2021.117893] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 02/17/2021] [Accepted: 02/28/2021] [Indexed: 12/16/2022]
Abstract
Glycosylated pH-sensitive mesoporous silica nanoparticles (MSNs) of capecitabine (CAP) were developed for targeting colorectal cancer. The MSNs possessed an average pore diameter of 8.12 ± 0.43 nm, pore volume of 0.73 ± 0.21 cm3/g, and particle size of 245.24 ± 5.75 nm. A high loading of 180.51 ± 5.23 mg/g attributed to the larger pore volume was observed. The surface of the drug-loaded MSNs were capped with chitosan-glucuronic acid (CHS-GCA) conjugate to combine two strategies viz. pH-sensitive, and lectin receptor mediated uptake. In vitro studies demonstrated a pH-sensitive and controlled release of CAP which was further enhanced in the presence of rat caecal content. Higher uptake of the (CAP-MSN)CHS-GCA was observed in HCT 116 cell lines. The glycosylated nanoparticles revealed reduction in the tumors, aberrant crypt foci, dysplasia and inflammation, and alleviation in the toxic features. This illustrated that the nanoparticles showed promising antitumor efficacy with reduced toxicity and may be used as a effective carrier against cancer.
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Affiliation(s)
- Reema Narayan
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Shivaprasad Gadag
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Sri Pragnya Cheruku
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Ashok M Raichur
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka, 560012, India
| | - Candace Minhthu Day
- UniSA: Clinical and Health Sciences, University of South Australia, Adelaide, SA, 5000, Australia
| | - Sanjay Garg
- UniSA: Clinical and Health Sciences, University of South Australia, Adelaide, SA, 5000, Australia
| | - Suman Manandhar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Karkala Sreedhara Ranganath Pai
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Akhil Suresh
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Chetan Hasmukh Mehta
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Yogendra Nayak
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Nitesh Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Usha Yogendra Nayak
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
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11
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Yin S, Sun N, Jiang F, Lu Y, Yang G, Wu X, Lin S, Zhang W, Jiang X. The Translation from In Vitro Bioactive Ion Concentration Screening to In Vivo Application for Preventing Peri-implantitis. ACS Appl Mater Interfaces 2021; 13:5782-5794. [PMID: 33464812 DOI: 10.1021/acsami.0c19698] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Peri-implantitis is a typical pathological condition characterized by the destructive inflammation in the soft tissue and the progressive loss of supporting bones. As the current effective treatments and preventive measures are inconsistent and unpredictable, the use of biomaterials as carriers of bioactive ion coatings is a promising approach. However, the translation from lab to large-scale production and clinical applications is difficult due to a technology barrier. Determining the effective dosage of each ion to achieve an in vivo application of the in vitro screening is challenging. Here, we selected zinc and strontium ions to provide multiple effects on antibacterial activity and osteogenesis. The optimal coating with effective release concentrations of the two ions was obtained after the two-step screening from in vitro testing. The results showed that this type of in vivo bioactive ion usage leads to an enhanced osseointegration during the immediate implantation in a periodontitis-affected environment and prevents soft tissue inflammation and bone resorption in an inflammatory environment. The new biologically active ion screening method could verify the effectiveness of this clinical translation and its potential for large-scale production and could determine the effective dosage of each ion for a specific application.
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Affiliation(s)
- Shi Yin
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
| | - Ningjia Sun
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
| | - Fei Jiang
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
| | - Yuezhi Lu
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
| | - Guangzheng Yang
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
| | - Xiaolin Wu
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
| | - Sihan Lin
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
| | - Wenjie Zhang
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
| | - Xinquan Jiang
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai 200011, China
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12
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Xiong XB, Liu C, Ni XY, Liang CQ, Zeng XR. Polyvinyl Alcohol/Graphene Oxide Interlayer for Enhancing Adhesive Performance of HA Coating on C/C Composites Prepared by Hydrothermal Electrodeposition/Hydrothermal Treatment. ACS Appl Mater Interfaces 2020; 12:55710-55722. [PMID: 33263993 DOI: 10.1021/acsami.0c17649] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hydroxyapatite (HA) coatings directly deposited by hydrothermal electrochemical technology (HET) onto carbon/carbon (C/C) composites exhibited a catastrophic failure occurring at the interface of the HA and C/C. To overcome this problem, a polyvinyl alcohol (PVA)/graphene oxide (GO) interlayer (P/G interlayer) was applied on the (NH4)2S2O8-pretreated C/C substrate (named P/G-C/C) by using a dipping method. Subsequently, a calcium phosphate coating was deposited on P/G-C/C, shortened as M-P/G-C/C, by HET, and then converted into HA coating (abbreviated as HA-P/G-C/C) through posthydrothermal treatment. For comparison, HA coating was prepared onto C/C without a P/G interlayer through the same process, which was denoted as HA-C/C. The composition, microstructure, and morphology of the samples were characterized by X-ray diffractometry (XRD), energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), Raman spectra, Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS). The adhesive performance of the coatings on C/C was measured by a scratch test. Finally, an in vitro bioactivity of the coatings was evaluated in a simulated body fluid solution at 37 °C. Results showed no apparent differences in the morphology and phase of the posttreated coatings, both of which are composed of a dense structure containing needle-like HA crystals. However, the HA-P/G-C/C sample possessed a higher Ca/P ratio and denser interface, thereby exhibiting higher adhesive performance and better bioactivity. The adhesive strength of the HA-P/G coating was observed at a critical load of 41.04 N, which increased by 29.3% relative to the HA coating. Moreover, the failure site was on the HA-P/G coating rather than at the interface. The enhanced adhesive performance was ascribed to the PVA/GO-repairing pits on C/C and PVA and GO toughening effects on the HA coating. In vitro and in vivo tests revealed no statistical significance for the two HA-coated C/C samples, although the HA-P/G coating exhibited better bioactivity, inducing the growth of bonelike apatite than the HA coating.
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Affiliation(s)
- Xin-Bo Xiong
- College of Materials, Shen Zhen Key Laboratory of Special Functional Materials, Shen Zhen University, Shen Zhen 518086, China
| | - Chun Liu
- Second People's Hospital of Changzhou, Nanjing Medical University, Changzhou 213003, China
| | - Xin-Ye Ni
- Second People's Hospital of Changzhou, Nanjing Medical University, Changzhou 213003, China
| | - Cai-Qing Liang
- College of Materials, Shen Zhen Key Laboratory of Special Functional Materials, Shen Zhen University, Shen Zhen 518086, China
| | - Xie-Rong Zeng
- College of Materials, Shen Zhen Key Laboratory of Special Functional Materials, Shen Zhen University, Shen Zhen 518086, China
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Vaquette C, Bock N, Tran PA. Layered Antimicrobial Selenium Nanoparticle-Calcium Phosphate Coating on 3D Printed Scaffolds Enhanced Bone Formation in Critical Size Defects. ACS Appl Mater Interfaces 2020; 12:55638-55648. [PMID: 33270424 DOI: 10.1021/acsami.0c17017] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Preventing bacterial colonization on scaffolds while supporting tissue formation is highly desirable in tissue engineering as bacterial infection remains a clinically significant risk to any implanted biomaterials. Elemental selenium (Se0) nanoparticles have emerged as a promising antimicrobial biomaterial without tissue cell toxicity, yet it remains unknown if their biological properties are from soluble Se ions or from direct cell-nanoparticle interactions. To answer this question, in this study, we developed a layered coating consisting of a Se nanoparticle layer underneath a micrometer-thick, biomimetic calcium phosphate (CaP) layer. We showed, for the first time, that the release of soluble HSe- ions from the Se nanoparticles strongly inhibited planktonic growth and biofilm formation of key bacteria, Staphylococcus aureus. The Se-CaP coating was found to support higher bone formation than the CaP-only coating in critical-size calvarial defects in rats; this finding could be directly attributed to the released soluble Se ions as the CaP layers in both groups had no detectable differences in the porous morphology, chemistry, and release of Ca or P. The Se-CaP coating was highly versatile and applicable to various surface chemistries as it formed through simple precipitation from aqueous solutions at room temperature and therefore could be promising in bone regeneration scaffolds or orthopedic implant applications.
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Affiliation(s)
- Cedryck Vaquette
- School of Dentistry, The University of Queensland, Herston, QLD 4059, Australia
| | - Nathalie Bock
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD 4059, Australia
- Translational Research Institute, Woolloongabba, QLD 4102, Australia
| | - Phong A Tran
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
- School of Mechanical, Medical and Process Engineering, Interface Science and Materials Engineering Group, Queensland University of Technology, Brisbane, QLD 4000, Australia
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14
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Choe JC, Park JH, Lee HC, Park TS, Ahn J, Park JS, Lee HW, Oh JH, Choi JH, Cha KS, Yim C, Jeon S. Histopathologic response after hydrophilic polyethylene glycol-coating stent and hydrophobic octadecylthiol-coating stent implantations in porcine coronary restenosis model. J Mater Sci Mater Med 2020; 31:122. [PMID: 33247775 DOI: 10.1007/s10856-020-06452-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 12/07/2019] [Accepted: 10/27/2020] [Indexed: 06/12/2023]
Abstract
Device-related problems of drug-eluting stents, including stent thrombosis related to antiproliferative drugs and polymers, can cause adverse events such as inflammation and neointimal hyperplasia. Stent surface modification, wherein the drug and polymer are not required, may overcome these problems. We developed hydrophilic polyethylene glycol (PEG)-coating and hydrophobic octadecylthiol (ODT)-coating stents without a drug and polymer and evaluated their histopathologic response in a porcine coronary restenosis model. PEG-coating stents (n = 12), bare-metal stents (BMS) (n = 12), and ODT-coating stents (n = 10) were implanted with oversizing in 34 porcine coronary arteries. Four weeks later, the histopathologic response, arterial injury, inflammation, and fibrin scores were analyzed. A p value < 0.05 was considered statistically significant. There were significant differences in the internal elastic lamina area, lumen area, neointimal area, percent area of stenosis, arterial injury score, inflammation score, and fibrin score among the groups. Compared to the BMS or ODT-coating stent group, the PEG-coating stent group had significantly increased internal elastic lamina and lumen area (all p < 0.001) and decreased neointimal area and percent area of stenosis (BMS: p = 0.03 and p < 0.001, respectively; ODT-coating: p = 0.013 and p < 0.001, respectively). Similarly, the PEG-coating group showed significantly lower inflammation and fibrin scores than the BMS or ODT-coating groups (BMS: p = 0.013 and p = 0.007, respectively; ODT-coating: p = 0.014 and p = 0.008, respectively). In conclusion, hydrophilic PEG-coating stent implantation was associated with lower inflammatory response, decreased fibrin deposition, and reduced neointimal hyperplasia than BMS or hydrophobic ODT-coating stent implantation in the porcine coronary restenosis model.
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Affiliation(s)
- Jeong Cheon Choe
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jong Ha Park
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Han Cheol Lee
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea.
| | - Tae Sik Park
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jinhee Ahn
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jin Sup Park
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Hye Won Lee
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jun-Hyok Oh
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jung Hyun Choi
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Kwang Soo Cha
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Changyong Yim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Sangmin Jeon
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
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15
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Chen YF, Goodheart C, Rua D. The Body's Cellular and Molecular Response to Protein-Coated Medical Device Implants: A Review Focused on Fibronectin and BMP Proteins. Int J Mol Sci 2020; 21:ijms21228853. [PMID: 33238458 PMCID: PMC7700595 DOI: 10.3390/ijms21228853] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/18/2020] [Accepted: 11/19/2020] [Indexed: 12/24/2022] Open
Abstract
Recent years have seen a marked rise in implantation into the body of a great variety of devices: hip, knee, and shoulder replacements, pacemakers, meshes, glucose sensors, and many others. Cochlear and retinal implants are being developed to restore hearing and sight. After surgery to implant a device, adjacent cells interact with the implant and release molecular signals that result in attraction, infiltration of the tissue, and attachment to the implant of various cell types including monocytes, macrophages, and platelets. These cells release additional signaling molecules (chemokines and cytokines) that recruit tissue repair cells to the device site. Some implants fail and require additional revision surgery that is traumatic for the patient and expensive for the payer. This review examines the literature for evidence to support the possibility that fibronectins and BMPs could be coated on the implants as part of the manufacturing process so that the proteins could be released into the tissue surrounding the implant and improve the rate of successful implantation.
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Affiliation(s)
- Yi-Fan Chen
- Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, MD 20993, USA;
| | | | - Diego Rua
- Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, MD 20993, USA;
- Correspondence:
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16
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Wang D, Deng J, Deng X, Fang C, Zhang X, Yang P. Controlling Enamel Remineralization by Amyloid-Like Amelogenin Mimics. Adv Mater 2020; 32:e2002080. [PMID: 32583928 DOI: 10.1002/adma.202002080] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/16/2020] [Indexed: 06/11/2023]
Abstract
In situ regeneration of the enamel-like structure of hydroxyapatite (HAp) crystals under oral conditions is significant for dental caries treatment. However, it is still a challenge for dentists to duplicate the elegant and well-aligned apatite structure bonding to the surface of demineralized enamel. A biocompatible amelogenin-inspired matrix, a phase-transited lysozyme (PTL) film mimicking an N-terminal amelogenin with central domain (N-Ame) combined with synthetic peptide (C-AMG) based on the functional domains of C-terminal telopeptide (C-Ame) is shown here, which is formed by amyloid-like lysozyme aggregation at the enamel interface through a rapid one-step aqueous coating process. In the PTL/C-AMG matrix, C-AMG facilitated the oriented arrangement of amorphous calcium phosphate (ACP) nanoparticles and their transformation to ordered enamel-like HAp crystals, while PTL served as a strong interfacial anchor to immobilize the C-AMG peptide and PTL/C-AMG matrix on versatile substrate surfaces. PTL/C-AMG film-coated enamel induced both of the in vivo and in vitro synthesis of HAp crystals, facilitated epitaxial growth of HAp crystals and recovered the highly oriented structure and mechanical properties to levels nearly identical to those of natural enamel. This work underlines the importance of amyloid-like protein aggregates in the biomineralization of enamel, providing a promising strategy for treating dental caries.
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Affiliation(s)
- Dong Wang
- School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, 710048, China
| | - Jingjing Deng
- School and Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin, 30070, China
| | - Xuliang Deng
- Department of Geriatric Dentistry, School and Hospital of Stomatology, Peking University, 22 Zhongguancun South Street, Beijing, 100081, China
| | - Changqing Fang
- School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, 710048, China
- The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China
| | - Xu Zhang
- School and Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin, 30070, China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
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Bose S, Ke D, Vu AA, Bandyopadhyay A, Goodman SB. Thermal Oxide Layer Enhances Crystallinity and Mechanical Properties for Plasma-Sprayed Hydroxyapatite Biomedical Coatings. ACS Appl Mater Interfaces 2020; 12:33465-33472. [PMID: 32530603 PMCID: PMC8009493 DOI: 10.1021/acsami.0c05035] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The stability of plasma-sprayed hydroxyapatite (HA) coatings on metallic implants in vivo remains a significant challenge for load-bearing orthopedic implants despite their excellent mechanical and osteoconductive properties. This study focuses on oxide layer formation on the surface of Ti6Al4V samples through furnace heating at 600, 700, and 800 °C for 10 min for optimization of the most effective oxide layer to increase plasma coating crystallinity and improve plasma coating bond strength with the metal surface. The 800 °C heat treatment shows an effective oxide layer which increases coating crystallinity from 64 to 75% and coating adhesive bond strength from 25.9 ± 2.3 to 30.7 ± 1.1 MPa, while simultaneously reducing the dissolution rate of HA coatings. The addition of biologically relevant dopants, MgO and SiO2, show negligible effects on crystallinity and adhesive bond strength on plasma-sprayed HA coatings and additionally show an enhancement effect on osteoblast proliferation and differentiation. Moreover, the inclusion of these additivess shows an increase in osteogenesis in a rat distal femur model after 6 and 10 weeks of implantation. Overall, this study provides a direct solution to improve the crystallinity, adhesive bond strength, and osteogenic properties of plasma-sprayed HA coatings on orthopedic implants that is more manufacturable and translational from research to an industrial scale.
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Affiliation(s)
- Susmita Bose
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99163, United States
| | - Dongxu Ke
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99163, United States
| | - Ashley A Vu
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99163, United States
| | - Amit Bandyopadhyay
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99163, United States
| | - Stuart B Goodman
- Department of Orthopaedic Surgery, Stanford Medicine Outpatient Center, Redwood City, California 94063, United States
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Otto DP, de Villiers MM. Layer-By-Layer Nanocoating of Antiviral Polysaccharides on Surfaces to Prevent Coronavirus Infections. Molecules 2020; 25:E3415. [PMID: 32731428 PMCID: PMC7435837 DOI: 10.3390/molecules25153415] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 07/24/2020] [Accepted: 07/26/2020] [Indexed: 12/28/2022] Open
Abstract
In 2020, the world is being ravaged by the coronavirus, SARS-CoV-2, which causes a severe respiratory disease, Covid-19. Hundreds of thousands of people have succumbed to the disease. Efforts at curing the disease are aimed at finding a vaccine and/or developing antiviral drugs. Despite these efforts, the WHO warned that the virus might never be eradicated. Countries around the world have instated non-pharmaceutical interventions such as social distancing and wearing of masks in public to curb the spreading of the disease. Antiviral polysaccharides provide the ideal opportunity to combat the pathogen via pharmacotherapeutic applications. However, a layer-by-layer nanocoating approach is also envisioned to coat surfaces to which humans are exposed that could harbor pathogenic coronaviruses. By coating masks, clothing, and work surfaces in wet markets among others, these antiviral polysaccharides can ensure passive prevention of the spreading of the virus. It poses a so-called "eradicate-in-place" measure against the virus. Antiviral polysaccharides also provide a green chemistry pathway to virus eradication since these molecules are primarily of biological origin and can be modified by minimal synthetic approaches. They are biocompatible as well as biodegradable. This surface passivation approach could provide a powerful measure against the spreading of coronaviruses.
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Affiliation(s)
- Daniel P. Otto
- Research Focus Area for Chemical Resource Beneficiation, Laboratory for Analytical Services, Faculty of Natural and Agricultural Sciences, North-West University, Potchefstroom 2531, South Africa
| | - Melgardt M. de Villiers
- Division of Pharmaceutical Sciences–Drug Delivery, School of Pharmacy, University of Wisconsin-Madison, 777 Highland Ave, Madison, WI 53705, USA;
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Liao MT, Chen MK, Hsieh MY, Yeh NL, Chien KL, Lin CC, Wu CC, Chie WC. Drug-coated balloon versus conventional balloon angioplasty of hemodialysis arteriovenous fistula or graft: A systematic review and meta-analysis of randomized controlled trials. PLoS One 2020; 15:e0231463. [PMID: 32287283 PMCID: PMC7156061 DOI: 10.1371/journal.pone.0231463] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 03/24/2020] [Indexed: 12/22/2022] Open
Abstract
Background Restenosis remains a significant problem in endovascular therapy for hemodialysis vascular access. Drug-coated balloon (DCB) angioplasty decreases restenosis in peripheral and coronary artery diseases. The aim of this systematic review and meta-analysis is to assess the patency outcomes following DCB angioplasty, as compared to conventional balloon (CB) angioplasty for the stenosis of hemodialysis vascular access. Methods A comprehensive search in the MEDLINE, EMBASE, and CENTRAL databases was conducted in order to identify eligible randomized controlled trials evaluating DCB angioplasty for hemodialysis vascular access dysfunction. The primary endpoint was the 6-month target lesion primary patency and the secondary endpoints were 12-month target lesion primary patency and procedure-related complications. Risk ratios (RR) were pooled and relevant subgroups were analyzed separately. Results Eleven randomized controlled trials comprised of 487 patients treated with DCB angioplasty and 489 patients treated with CB angioplasty were included. There were no significant differences in the target lesion primary patency at 6 months [RR, 0.75; 95% confidence interval (CI), 0.56, 1.01; p = 0.06] and at 12 months (RR 0.89; 95% CI, 0.79, 1.00; p = 0.06). The absence of benefit for the DCB group remained, even in the arteriovenous fistula subgroup or the subgroup of studies excluding central vein stenosis. The risk of procedure-related complication did not differ between the two groups (RR 1.00; 95% CI 0.98, 1.02; p = 0.95). Conclusion DCB angioplasty did not demonstrate significant patency benefit for the treatment of hemodialysis vascular access dysfunction. Wide variations in patency outcomes across studies were noted. Further studies focusing on specific types of access or lesions are warranted to clarify the value of DCB for hemodialysis vascular access. (PROSPERO Number CRD42019119938)
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Affiliation(s)
- Min-Tsun Liao
- Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital Hsinchu Branch, Hsinchu, Taiwan
| | - Meng-Kan Chen
- Department of Family Medicine, National Taiwan University Hospital Hsinchu Branch, Hsinchu, Taiwan
| | - Mu-Yang Hsieh
- Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital Hsinchu Branch, Hsinchu, Taiwan
- College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Nai-Lun Yeh
- Department of Family Medicine, National Taiwan University Hospital Hsinchu Branch, Hsinchu, Taiwan
| | - Kuo-Liong Chien
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Chih-Ching Lin
- Division of Nephrology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming University, Taipei, Taiwan
| | - Chih-Cheng Wu
- College of Medicine, National Taiwan University, Taipei, Taiwan
- Institute of Biomedical Engineering, National Tsing-Hua University, Hsinchu, Taiwan
- Cardiovascular Center, National Taiwan University Hospital Hsinchu Branch, Hsinchu, Taiwan
- Institute of Cellular and System Medicine, National Health Research Institute, Zhunan, Taiwan
- * E-mail: (CCW); (WCC)
| | - Wei-Chu Chie
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
- Department of Family Medicine, National Taiwan University Hospital, Taipei, Taiwan
- * E-mail: (CCW); (WCC)
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20
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Zhu T, Zhou M, Gao W, Fang D, Liu Z, Wu G, Wan M, Mao C, Shen J. Coronary Stents Decorated by Heparin/NONOate Nanoparticles for Anticoagulant and Endothelialized Effects. Langmuir 2020; 36:2901-2910. [PMID: 32114762 DOI: 10.1021/acs.langmuir.0c00112] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In the treatment of coronary artery disease (CAD), the use of stent implantation often leads to clinical complications such as restenosis, delayed endothelial healing, and thrombosis. Here, we develop a double drug sustained-release coating for the stent surface by grafting heparin/NONOate nanoparticles (Hep/NONOates). The Hep/NONOates and surface modification of the stent were characterized by X-ray photoelectron spectroscopy, attenuated total reflection Fourier-transform infrared spectroscopy, static water contact angle, and scanning electron microscopy (SEM), and the release behaviors of the anticoagulant, heparin (Hep) and the bioactive molecule, nitric oxide (NO) were studied. Furthermore, the blood compatibility and cytotoxicity of the modified stent were evaluated by whole blood adhesion and platelet adhesion tests, hemolysis assay, morphological changes of red blood cells, plasma recalcification time assay, in vitro coagulation time tests, and MTT assay. Finally, the results of a rabbit carotid artery stent implantation experiment showed that the double drug sustained-release coating for the stent can accelerate regeneration of endothelial cells and keep good anticoagulant activity. This study can provide new design ideas based on nanotechnology for improving the safety and effectiveness of drug-eluting stents.
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Affiliation(s)
- Tianyu Zhu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Min Zhou
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Wentao Gao
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Dan Fang
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Zhiyong Liu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Guangyan Wu
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Mimi Wan
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Chun Mao
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Jian Shen
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
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Welden R, Schöning MJ, Wagner PH, Wagner T. Light-Addressable Electrodes for Dynamic and Flexible Addressing of Biological Systems and Electrochemical Reactions. Sensors (Basel) 2020; 20:s20061680. [PMID: 32192226 PMCID: PMC7147159 DOI: 10.3390/s20061680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 03/13/2020] [Accepted: 03/13/2020] [Indexed: 01/25/2023]
Abstract
In this review article, we are going to present an overview on possible applications of light-addressable electrodes (LAE) as actuator/manipulation devices besides classical electrode structures. For LAEs, the electrode material consists of a semiconductor. Illumination with a light source with the appropiate wavelength leads to the generation of electron-hole pairs which can be utilized for further photoelectrochemical reaction. Due to recent progress in light-projection technologies, highly dynamic and flexible illumination patterns can be generated, opening new possibilities for light-addressable electrodes. A short introduction on semiconductor–electrolyte interfaces with light stimulation is given together with electrode-design approaches. Towards applications, the stimulation of cells with different electrode materials and fabrication designs is explained, followed by analyte-manipulation strategies and spatially resolved photoelectrochemical deposition of different material types.
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Affiliation(s)
- Rene Welden
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, 52428 Jülich, Germany; (R.W.); (M.J.S.)
- Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Michael J. Schöning
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, 52428 Jülich, Germany; (R.W.); (M.J.S.)
- Institute of Complex Systems (ICS-8), Research Center Jülich GmbH, 52428 Jülich, Germany
| | - Patrick H. Wagner
- Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Torsten Wagner
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, 52428 Jülich, Germany; (R.W.); (M.J.S.)
- Institute of Complex Systems (ICS-8), Research Center Jülich GmbH, 52428 Jülich, Germany
- Correspondence: ; Tel.: +49-241-6009-53766
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22
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Shirai T, Tsuchiya H, Terauchi R, Tsuchida S, Mizoshiri N, Mori Y, Takeuchi A, Hayashi K, Yamamoto N, Ikoma K, Kubo T. A retrospective study of antibacterial iodine-coated implants for postoperative infection. Medicine (Baltimore) 2019; 98:e17932. [PMID: 31702678 PMCID: PMC6855576 DOI: 10.1097/md.0000000000017932] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Postoperative infection is one of the most serious complications in orthopedic surgery. We have developed and use iodine-coated implants to prevent and treat postoperative infection in compromised hosts. This study evaluated outcomes using iodine-coated implants for postoperative infections.We treated 72 postoperative infected patients using iodine-coated implants. Of these, 38 were males and 34 were females, with a mean age of 59.3 years. The mean follow-up period was 5.6 years. The patients included 23 with an infection following total knee arthroplasty, 20 following total hip arthroplasty, 11 following osteosynthesis, 11 following spine surgery, 6 following tumor excision, and 1 following osteotomy. Of these, 37 underwent single-stage surgery and 35 underwent staged revision surgery. We performed staged surgery in any case with active infection. The survival of iodine-coated implants was determined using Kaplan-Meier analysis. White blood cell (WBC) and C-reactive protein (CRP) levels were measured pre- and postoperatively. To evaluate the systemic effects of iodine, serum thyroid hormone levels were examined.Five patients underwent re-revision surgery. In 3 patients, periprosthetic infection recurred at an average of 18 months after surgery. The reinfection rate was 4.2%. These patients recovered following reimplantation of iodine-coated prostheses. No patients required amputation. The survival rate of iodine-coated implants was 91%. There were no signs of infection at the latest follow-up. The median WBC level was nearly in the normal range, and CRP levels returned to normal within 4 weeks after surgery. No abnormalities of thyroid gland function were detected.Iodine-coated titanium implants can be very effective in the treatment of postoperative infections. An iodine coating can be safely applied to infected regions.
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Affiliation(s)
- Toshiharu Shirai
- Department of Orthopedics, Graduate School of Medical Science, Kyoto prefectural University of Medicine, 465 Kajiicho Kyoto
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi Kanazawa, Japan
| | - Hiroyuki Tsuchiya
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi Kanazawa, Japan
| | - Ryu Terauchi
- Department of Orthopedics, Graduate School of Medical Science, Kyoto prefectural University of Medicine, 465 Kajiicho Kyoto
| | - Shinji Tsuchida
- Department of Orthopedics, Graduate School of Medical Science, Kyoto prefectural University of Medicine, 465 Kajiicho Kyoto
| | - Naoki Mizoshiri
- Department of Orthopedics, Graduate School of Medical Science, Kyoto prefectural University of Medicine, 465 Kajiicho Kyoto
| | - Yuki Mori
- Department of Orthopedics, Graduate School of Medical Science, Kyoto prefectural University of Medicine, 465 Kajiicho Kyoto
| | - Akihiko Takeuchi
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi Kanazawa, Japan
| | - Katsuhiro Hayashi
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi Kanazawa, Japan
| | - Norio Yamamoto
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi Kanazawa, Japan
| | - Kazuya Ikoma
- Department of Orthopedics, Graduate School of Medical Science, Kyoto prefectural University of Medicine, 465 Kajiicho Kyoto
| | - Toshikazu Kubo
- Department of Orthopedics, Graduate School of Medical Science, Kyoto prefectural University of Medicine, 465 Kajiicho Kyoto
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Hoque J, Ghosh S, Paramanandham K, Haldar J. Charge-Switchable Polymeric Coating Kills Bacteria and Prevents Biofilm Formation in Vivo. ACS Appl Mater Interfaces 2019; 11:39150-39162. [PMID: 31550124 DOI: 10.1021/acsami.9b11453] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Preventing bacterial biofilm formation on medical devices and implants in vivo still remains a daunting task. Current antibacterial coatings to combat implant-associated infections are generally composed of toxic metals or nondegradable polymers and involve multistep surface modifications. Here, we present a charge-switchable antibacterial and antibiofilm coating based on water-insoluble cationic hydrophobic polymers that are soluble in organic solvents and can be noncovalently coated onto different surfaces. Toward this, a library of quaternary polyethylenimine (QPEI) polymers with an amide or ester group in their pendant alkyl chain was developed. These QPEIs are shown to hydrolyze from active cationic to nontoxic zwitterionic polymers under acidic or enzymatic conditions. Notably, polymers with both zwitterionic and cationic groups, obtained upon partial hydrolysis of QPEIs, are shown to retain their antibacterial activity with much lower toxicity toward mammalian cells. Furthermore, the zwitterionic polymer, a fully hydrolyzed product of the QPEIs, is shown to be nontoxic to mammalian cells in vitro as well as in vivo. The QPEIs, when coated onto surfaces, kill bacteria and prevent formation of biofilms. In an in vivo mice model, the QPEI-coated medical grade catheter is shown to reduce methicillin-resistant Staphylococcus aureus contamination both on the catheter surface and in the adjacent tissues (99.99% reduction compared to a noncoated catheter). Additionally, biofilm formation is inhibited on the catheter surface with negligible inflammation in the adjacent tissue. The above results thus highlight the importance of these polymers to be used as effective antibacterial coatings in biomedical applications.
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Affiliation(s)
| | | | - Krishnamoorthy Paramanandham
- National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI) Ramagondanahalli , Yelahanka, Bengaluru 560064 , India
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24
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Behzadpour N, Akbari N, Sattarahmady N. Photothermal inactivation of methicillin-resistant Staphylococcus aureus: anti-biofilm mediated by a polypyrrole-carbon nanocomposite. IET Nanobiotechnol 2019; 13:800-807. [PMID: 31625519 PMCID: PMC8676018 DOI: 10.1049/iet-nbt.2018.5340] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 01/01/2019] [Accepted: 02/07/2019] [Indexed: 04/05/2024] Open
Abstract
Widespread resistance to antibiotics amongst pathogens has become a tremendous challenge of high morbidity and mortality rates which increases the needs to exploring novel methods of treatment. An efficient antimicrobial procedure to root out pathogenic bacteria is photothermal therapy. In this study, antimicrobial effects of a polypyrrole-carbon nanocomposite (PPy-C) upon laser irradiation in order to destroy the pathogenic gram-positive bacterium, methicillin-resistant Staphylococcus aureus (MRSA) were assessed. The bacterial cells were incubated with 500, 750 and 1000 μg ml-1 concentrations of PPy-C and irradiated with an 808-nm laser at a power density of 1.0 W cm-2. To indicate the biocompatibility and toxic effect of the nanocomposite without and with laser irradiation, the authors counted the number of CFUs and compared it to an untreated sample. Antibacterial mechanisms of PPy-C were assessed through temperature increment, reactive oxygen species production, and protein and DNA leakages. Photothermal heating assay showed that 26°C temperature increases in the presence of 1000 µg ml-1 PPy-C led to >98% killing of MRSA. Furthermore, 20 min radiation of near-infrared light to PPy-C in different concentrations indicated destruction and reduction in the MRSA biofilm formation. Therefore, PPy-C was introduced as a photothermal absorber with a bactericidal effect in MRSA.
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Affiliation(s)
- Niloufar Behzadpour
- Department of Medical Physics, School of Medicine, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Neda Akbari
- Department of Microbiology, Faculty of Science, Arak Branch, Islamic Azad University, Arak, Iran
| | - Naghmeh Sattarahmady
- Department of Medical Physics, School of Medicine, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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Aghamiri S, Jafarpour A, Shoja M. Effects of silver nanoparticles coated with anti-HER2 on irradiation efficiency of SKBR3 breast cancer cells. IET Nanobiotechnol 2019; 13:808-815. [PMID: 31625520 PMCID: PMC8676115 DOI: 10.1049/iet-nbt.2018.5258] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 11/02/2018] [Accepted: 01/31/2019] [Indexed: 11/20/2023] Open
Abstract
Breast cancer is the second cause of death in the world. Ionising radiation is a potent mutagen that can cause DNA damage, chromosomes breakage, and cell death. In the present study, radiotherapy and nanoparticle-antibodies (ABs) have been combined to enhance the efficacy of cancer cell treatment. Silver nanoparticles (SNP) were synthesised, coated with anti-HER2, and then characterised with different techniques such as X-ray diffraction, dynamic light scattering, transmission electron microscopy, Fourier transform infrared, and UV-Vis spectroscopy. SKBR3 cells were irradiated with cobalt-60 in the presence of nanoparticle-AB as the drug. Cell viability was measured using the diphenyltetrazolium bromide assay, and the cellular status was assessed by Raman spectroscopy. Irradiation considerably decreased cell viability proportionate to the dose increase and post-irradiation time. The surface-enhanced Raman spectroscopy increased the signal in the presence of SNP. Increasing the dose to 2 Gy increased the irradiation resistance, and higher dose increases (4 and 6 Gy) enhanced the irradiation sensitivity. Moreover, the cellular changes induced by irradiation in the presence of the drug were stable after 48 h. The authors results introduced the combination of the drug with radiation as an effective treatment for cancer and Raman spectroscopy as a suitable tool to diagnose effective irradiation doses.
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Affiliation(s)
- Shahin Aghamiri
- Student Research Committee, Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Jafarpour
- Virology Division, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohsen Shoja
- Faculty of Paramedicine, Semnan University of Medical Sciences, Semnan, Iran.
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26
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Du X, Lin WC, Su HH. Highly efficient polyethylene glycol-functionalised gold nanorods for photothermal ablation of hepatocellular carcinoma cells. IET Nanobiotechnol 2019; 13:842-849. [PMID: 31625525 PMCID: PMC8676299 DOI: 10.1049/iet-nbt.2018.5417] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 04/18/2019] [Accepted: 05/07/2019] [Indexed: 09/26/2023] Open
Abstract
Gold nanorods (GNRs) with exceptional photothermal properties have held promising potential for application in the biomedical field. In this study, the authors achieved photothermal ablation by polyethylene glycol (PEG)-functionalised GNRs. Well-dispersed and uniform GNRs were produced through a seed-mediated growth method. A thermal camera was used to scrutinise the temperature distribution and efficiency of the photothermal properties of the GNRs, which were irradiated by an 808 nm laser on a silicon chip. They observed that the GNRs provided about a 5°C temperature increase and produced hyperthermia efficiently. Since GNRs need to be surface tailored with a biocompatible material rather than cetyltrimethylammonium bromide (CTAB), they chose methoxyl PEG thiol to modify the GNRs. By taking advantage of the alkaline environment that assists this functionalisation, they accomplished about 89% removal of CTAB and identified a PEG layer on the surface of the GNRs. The GNR biocompatibility was considerably improved without any shift of the optical properties. Hepatocellular carcinoma cells were incubated with GNRs for 24 h and then were irradiated with a near-infrared laser for 3 min. Few cells remained alive, which demonstrated the photothermal ablation ability of the GNRs.
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Affiliation(s)
- Xingyu Du
- Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Wei-Chih Lin
- Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan.
| | - Hsing-Hao Su
- Department of Otorhinolaryngology, Head and Neck Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
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Varshosaz J, Ghassami E, Noorbakhsh A, Minaiyan M, Jahanian-Najafabadi A. Trastuzumab-conjugated nanoparticles composed of poly(butylene adipate- co-butylene terephthalate) prepared by electrospraying technique for targeted delivery of docetaxel. IET Nanobiotechnol 2019; 13:829-833. [PMID: 31625523 PMCID: PMC8676484 DOI: 10.1049/iet-nbt.2018.5363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 03/29/2019] [Accepted: 04/23/2019] [Indexed: 11/19/2022] Open
Abstract
Human epidermal growth factor receptor 2 (HER-2) is overexpressed in 20-30% of human breast cancers, associated with poor prognosis and tumour aggression. The aim of this study was the production of trastuzumab-targeted Ecoflex nanoparticles (NPs) loaded with docetaxel and in vitro evaluation of their cytotoxicity and cellular uptake. The NPs were manufactured by electrospraying and characterised regarding size, zeta potential, drug loading, and release behaviour. Then their cytotoxicity was evaluated by MTT assay against an HER-2-positive cell line, BT-474, and an HER-2-negative cell line, MDA-MB-468. The cellular uptake was studied by flow cytometry and fluorescent microscope. The particle size of NPs was in an appropriate range, with relatively high drug entrapment and acceptable release efficiency. The results showed no cytotoxicity for the polymer, but the significant increment of cytotoxicity was observed by treatment with docetaxel-loaded NPs in both HER-2-positive and HER-2-negative cell lines, in comparison with the free drug. The trastuzumab-targeted NPs also significantly enhanced cytotoxicity against BT-474 cells, compared with non-targeted NPs.
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Affiliation(s)
- Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Erfaneh Ghassami
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Abdollah Noorbakhsh
- Department of Nanotechnology Engineering, Faculty of Advanced Sciences and Technology, University of Isfahan, Isfahan, Iran
| | - Mohsen Minaiyan
- Department of Pharmacology, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ali Jahanian-Najafabadi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
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Norahan MH, Amroon M, Ghahremanzadeh R, Rabiee N, Baheiraei N. Reduced graphene oxide: osteogenic potential for bone tissue engineering. IET Nanobiotechnol 2019; 13:720-725. [PMID: 31573541 PMCID: PMC8676151 DOI: 10.1049/iet-nbt.2019.0125] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/09/2019] [Accepted: 06/04/2019] [Indexed: 09/28/2023] Open
Abstract
Collagen (Col) type I, as the major component of the bone extracellular matrix has been broadly studied for bone tissue engineering. However,inferior mechanical properties limit its usage for load bearing applications. In this research, freeze dried Col scaffolds are coated with graphene oxide (GO) through a covalent bond of the amine Col with the graphene carboxyl groups. The prepared scaffolds were then reduced using a chemical agent. Scanning electron microscopy exhibited a porous structure for the synthesized scaffolds with an approximate pore size of 100-220 ± 12 µm, which is in the suitable range for bone tissue engineering application. Reducing the GO coating improved the compressive modulus of the Col from 250 to 970 kPa. Apatite formation was also indicated by immersing the scaffolds in simulated body fluid after five days. The cytocompatibility of the scaffolds, using human bone marrow-derived mesenchymal stem cells, was confirmed with MTT analysis. Alkaline phosphatase assay revealed that reducing the Col-GO scaffolds can effectively activate the differentiation of hBM-MSCs into osteoblasts after 14 days, even without the addition of an osteogenic differentiation medium. The results of this study highlight that GO and its reduced form have considerable potential as bone substitutes for orthopaedic and dental applications.
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Affiliation(s)
| | - Masoud Amroon
- Department of Biomedical Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
| | - Ramin Ghahremanzadeh
- Nanobiotechnology Research Center, Avicenna research institute, ACECR, Tehran, Iran
| | - Navid Rabiee
- Department of Chemistry, Shahid Beheshti University, Tehran, Iran
| | - Nafiseh Baheiraei
- Tissue Engineering and Applied Cell Sciences Division, Department of Hematology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
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Chandwani P, Meel B, Singhal R, Jangid K, Ahmed R, Yadav M, Gupta AK, Chopra R. Three-Year Outcomes of Biodegradable Polymer-Coated Ultra-Thin (60 µm) Sirolimus-Eluting Stents in Real-World Clinical Practice. Ann Acad Med Singap 2019; 48:150-155. [PMID: 31210252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
INTRODUCTION Although drug-eluting stents (DES) have outclassed the use of bare metal stents, the safety and efficacy of DES at long-term follow-up has still been conflicting because of increased occurrence of late or very late restenosis and stent thrombosis after DES implantation. Hence, the present study was aimed to evaluate the 3-year safety and clinical performance of biodegradable polymer-coated ultra-thin (60 µm) sirolimus-eluting stent (SES) in real-world patients with coronary artery disease (CAD). MATERIALS AND METHODS This was a physician-initiated, retrospective, single-centre, observational study that included 237 consecutive patients who had previously undergone implantation of only Supraflex SES (Sahajanand Medical Technologies Pvt Ltd, Surat, India) for the treatment of CAD. Follow-up was received after 1 year and 3 years of stent implantation. The primary endpoint was major adverse cardiac events (MACE), a composite of cardiac death, myocardial infarction (MI) and target lesion revascularisation (TLR). Stent thrombosis was considered as a safety endpoint. RESULTS The mean age of patients was 64.1 ± 10.2 years, and 192 (81.0%) patients were male. The average stent length and diameter were 24.4 ± 9.0 mm and 3.1 ± 0.4 mm, respectively. The cumulative MACE rate at 3 years follow-up was 6.5% which included 4 (1.8%) cardiac deaths, 6 (2.8%) MI, and 4 (1.8%) TLR. There were 2 (0.9%) cases of stent thrombosis. CONCLUSION Treatment of patients with CAD in real-world clinical practice was associated with sustained clinical safety and low rates of restenosis, stent thrombosis and MACE up to 3 years after Supraflex SES implantation.
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Affiliation(s)
- Prakash Chandwani
- Department of Cardiology, Heart and General Hospital, Rajasthan, India
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Kanugala S, Jinka S, Puvvada N, Banerjee R, Kumar CG. Phenazine-1-carboxamide functionalized mesoporous silica nanoparticles as antimicrobial coatings on silicone urethral catheters. Sci Rep 2019; 9:6198. [PMID: 30996286 PMCID: PMC6470230 DOI: 10.1038/s41598-019-42722-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 04/04/2019] [Indexed: 12/12/2022] Open
Abstract
Microbial infections due to biofilms on medical implants can be prevented by antimicrobial coatings on biomaterial surfaces. Mesoporous silica nanoparticles (MSNPs) were synthesized via base-catalyzed sol-gel process at room temperature, functionalized with phenazine-1-carboxamide (PCN) and characterized by UV-visible, FT-IR, DLS, XRD spectroscopic techniques, SEM, TEM, TGA and BET analysis. Native MSNPs, PCN and PCN-MSNPs were evaluated for anti-Candida minimum inhibitory concentration (MIC), minimum fungicidal concentration (MFC), Candida albicans (C. albicans) biofilms and C. albicans-Staphylococcus aureus (S. aureus) polymicrobial biofilm inhibition. PCN-MSNPs were four-fold effective (MIC 3.9 µg mL-1; 17.47 µM) and MFC (7.8 µg mL-1; 34.94 µM) as compared to pure PCN (MIC 15.6 µg mL-1; 69.88 µM) and MFC (31.2 µg mL-1; 139.76 µM). PCN-MSNPs inhibited in vitro C. albicans MTCC 227-S. aureus MTCC 96 biofilms at very low concentration (10 µg mL-1; 44.79 µM) as compared to pure PCN (40 µg mL-1; 179.18 µM). Mechanistic studies revealed that PCN induced intracellular ROS accumulation in C. albicans MTCC 227, S. aureus MTCC 96 and S. aureus MLS-16 MTCC 2940, reduction in total ergosterol content, membrane permeability, disruption of ionic homeostasis followed by Na+, K+ and Ca2+ leakage leading to cell death in C. albicans MTCC 227 as confirmed by confocal laser scanning micrographs. The silicone urethral catheters coated with PCN-MSNPs (500 µg mL-1; 2.23 mM) exhibited no formation of C. albicans MTCC 227 - S. aureus MTCC 96 and C. albicans MTCC 227 - S. aureus MLS -16 MTCC 2940 biofilms. This is the first report on PCN-MSNPs for use as antimicrobial coatings against microbial adhesion and biofilm formation on silicone urethral catheters.
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Affiliation(s)
- Sirisha Kanugala
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad, 500007, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, India
| | - Sudhakar Jinka
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad, 500007, India
| | - Nagaprasad Puvvada
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad, 500007, India
| | - Rajkumar Banerjee
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad, 500007, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, India
| | - C Ganesh Kumar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad, 500007, India.
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, India.
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Qiu H, Qi P, Liu J, Yang Y, Tan X, Xiao Y, Maitz MF, Huang N, Yang Z. Biomimetic engineering endothelium-like coating on cardiovascular stent through heparin and nitric oxide-generating compound synergistic modification strategy. Biomaterials 2019; 207:10-22. [PMID: 30947118 DOI: 10.1016/j.biomaterials.2019.03.033] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 03/15/2019] [Accepted: 03/22/2019] [Indexed: 01/23/2023]
Abstract
Co-immobilization of two or more molecules with different and complementary functions to prevent thrombosis, suppress smooth muscle cell (SMC) proliferation, and support endothelial cell (EC) growth is generally considered to be promising for the re-endothelialization on cardiovascular stents. However, integration of molecules with distinct therapeutic effects does not necessarily result in synergistic physiological functions due to the lack of interactions among them, limiting their practical efficacy. Herein, we apply heparin and nitric oxide (NO), two key molecules of the physiological functions of endothelium, to develop an endothelium-mimetic coating. Such coating is achieved by sequential conjugation of heparin and the NO-generating compound selenocystamine (SeCA) on an amine-bearing film of plasma polymerized allylamine. The resulting surface combines the anti-coagulant (anti-FXa) function provided by the heparin and the anti-platelet activity of the catalytically produced NO. It also endows the stents with the ability to simultaneously up-regulate α-smooth muscle actin (α-SMA) expression and to increase cyclic guanylate monophosphate (cGMP) synthesis of SMC, thereby significantly promoting their contractile phenotype and suppressing their proliferation. Importantly, this endothelium-biomimetic coating creates a favorable microenvironment for EC over SMC. These features impressively improve the antithrombogenicity, re-endothelialization and anti-restenosis of vascular stents in vivo.
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Affiliation(s)
- Hua Qiu
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Pengkai Qi
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Jingxia Liu
- Physical Education Department, Southwest Jiaotong University, Chengdu, 610031, China
| | - Ying Yang
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China; Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, 4059, Australia
| | - Xing Tan
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Yu Xiao
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Manfred F Maitz
- Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research Dresden, Dresden, 01069, Germany
| | - Nan Huang
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
| | - Zhilu Yang
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
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Dong A, Han L, Shao Z, Fan P, Zhou X, Yuan H. Glaucoma Drainage Device Coated with Mitomycin C Loaded Opal Shale Microparticles to Inhibit Bleb Fibrosis. ACS Appl Mater Interfaces 2019; 11:10244-10253. [PMID: 30689341 DOI: 10.1021/acsami.8b18551] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Excessive fibrosis is the topmost factor for the defeat of surgical glaucoma drainage device (GDD) implantation. Adjuvant drug approaches are promising to help reduce the scar formation and excessive fibrosis. Opal shale (OS), as a natural state and noncrystalline silica substance with poriferous nature and strong adsorbability, is highly likely to undertake drug loading and delivery. Here, we employed OS microparticles (MPs) by ultrasound and centrifugation and presented an innovative and improved GDD coated with OS MPs, which were loaded with mitomycin C (MMC). MMC-loaded OS MPs were physically absorbed on the Ahmed glaucoma valve surface through OS' adsorbability. About 5.51 μg of MMC was loaded on the modified Ahmed glaucoma valve and can be released for 18 days in vitro. MMC-loaded OS MPs inhibited fibroblast proliferation and showed low toxicity to primary Tenon's fibroblasts. The ameliorated drainage device was well tolerated and effective in reducing the fibrous reaction in vivo. Hence, our study constructed an improved Ahmed glaucoma valve using OS MPs without disturbing aqueous humor drainage pattern over the valve surface. The modified Ahmed glaucoma valve successfully alleviated scar tissue formation after GDD implantation surgery.
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Affiliation(s)
- Aimeng Dong
- Department of Ophthalmology , The Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang 150081 , P. R. China
- The Key Laboratory of Myocardial Ischemia , Harbin Medical University, Ministry of Education , Harbin , Heilongjiang Province 150081 , P. R. China
| | - Liang Han
- Department of Pharmaceutics, College of Pharmaceutical Sciences , Soochow University , Suzhou 215123 , P. R. China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences , Soochow University , Suzhou 215123 , P. R. China
| | - Zhengbo Shao
- Department of Ophthalmology , The Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang 150081 , P. R. China
| | - Pan Fan
- Department of Ophthalmology , The Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang 150081 , P. R. China
| | - Xinrong Zhou
- Department of Ophthalmology , The Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang 150081 , P. R. China
| | - Huiping Yuan
- Department of Ophthalmology , The Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang 150081 , P. R. China
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Du X, Wang F, Wu DM, Zhang MH, Jia X, Zhang JW, Zhuang BX, Zhao Y, Guo PF, Bi W, Fu WG, Guo W, Wang SM. Comparison between paclitaxel-coated balloon and standard uncoated balloon in the treatment of femoropopliteal long lesions in diabetics. Medicine (Baltimore) 2019; 98:e14840. [PMID: 30921183 PMCID: PMC6455750 DOI: 10.1097/md.0000000000014840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Atherosclerotic diseases may include femoropopliteal artery stenosis or occlusion. Percutaneous transluminal angioplasty (PTA) is an effective and minimally invasive treatment strategy for atherosclerotic femoropopliteal artery stenosis/occlusion disease. Balloon angioplasty is a widely used technique in the management of occlusive disease in almost all arterial segments.We enrolled 111 diabetics with long femoropopliteal lesions, among which 54 received PTA with paclitaxel-coated balloon (the Paclitaxel group), and 57 with standard balloon catheters (the Control group).The primary outcome was set as angiographic late lumen loss (LLL) within 6 months; the secondary angiographic outcome was binary restenosis. Clinical outcomes included Rutherford clarification, ankle-brachial index (ABI) and rate of clinically driven target lesion revascularization (TLR). Two groups had similar basal clinical features, angiographic and procedural characteristics. Compared to controls, the Paclitaxel group had a significantly lower 6-month LLL rate, 12-month binary restenosis rate, 12-month TLR, lower Rutherford grades at 3 and 6 months, and higher ABI at 3 months. For all factors which might influence outcomes, fasting blood glucose was negatively correlated with ABI; the blood urea nitrogen (BUN) was positively related with the Rutherford clarification grades. In addition, the coronary heart disease (CHD) and smoking histories were positively correlated with residual stenosis after treatment.Collectively, the paclitaxel-coated balloon angioplasty can yield more favorable angiographic and clinical outcomes than standard uncoated balloon angioplasty, even in the more challenging lesions (the long and occlusive femoropopliteal lesions) in diabetics, when it had a similar safety profile to the traditional balloon. Blood glucose, BUN, CHD, and smoking imply poor curative effects.
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Affiliation(s)
- Xin Du
- Chinese PLA General Hospital
| | - Feng Wang
- First Affiliated Hospital of Dalian Medical University
| | - Dan-ming Wu
- The people's hospital of Liaoning province, Shenyang
| | | | - Xin Jia
- Chinese PLA General Hospital
| | - Ji-wei Zhang
- Shanghai Jiao Tong University School of Medicine Affiliated Renji Hospital
| | - Bai-xi Zhuang
- China Academy of Chinese Medical Sciences Xiyuan Hospital
| | - Yu Zhao
- Chongqing Medical University First Affiliated Hospital
| | - Ping-fan Guo
- First Affiliated Hospital of Fujian Medical University
| | - Wei Bi
- Second Hospital of Hebei Medical University
| | | | - Wei Guo
- Chinese PLA General Hospital
| | - Shen-ming Wang
- The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Health Quality Ontario. Intermittent Catheters for Chronic Urinary Retention: A Health Technology Assessment. Ont Health Technol Assess Ser 2019; 19:1-153. [PMID: 30847008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
BACKGROUND People with chronic urinary retention typically require intermittent catheterization. This review evaluates the effectiveness, safety, patient preference, cost-effectiveness, and budget impact of different types of intermittent catheter (IC). Specifically, we compared prelubricated catheters (hydrophilic, gel reservoir) and noncoated catheters, as well as their single use versus reuse (multiple use). METHODS We performed a systematic literature search and included randomized controlled trials, cohort, and case-control studies that examined any type of single-use versus multiple-use IC, hydrophilic single-use versus noncoated single-use, or gel reservoir single-use versus noncoated single-use. The outcomes of interest were symptomatic urinary tract infection (UTI), hematuria, other serious adverse events, and patient satisfaction. The quality of the body of evidence was examined according to the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) Working Group criteria. We also completed an economic evaluation, using the perspective of the Ontario Ministry of Health and Long-Term Care, to determine the cost-effectiveness of various intermittent catheters used in Ontario. We determined the budget impact of fully and partially funding various intermittent catheters for outpatients with chronic urinary retention. To understand patient experiences with intermittent catheterization, we interviewed 34 adults and parents of children affected by chronic urinary retention. RESULTS We found 14 randomized controlled trials that met the inclusion criteria. When comparing any type of single-use or multiple-use IC, we found no difference in UTI (RR = 0.98, 95% CI 0.70-1.39), hematuria, or serious adverse events, and inconclusive evidence on patient satisfaction.Our meta-analysis of studies on people living in the community showed that hydrophilic ICs may result in fewer UTIs than single-use noncoated ICs, but given the nature of the studies, we were uncertain about this conclusion.The nature of the available evidence also did not allow us to make definitive conclusions regarding whether one type of catheter was likely to result in less hematuria, fewer serious adverse events, or greater patient satisfaction.Our economic evaluation found that owing to small differences in quality-adjusted life-years and moderate to large incremental cost differences, the lowest-cost ICs-noncoated multiple-use (using one catheter per week or one catheter per day)-have the highest probability of being cost-effective. In a subpopulation of those clinically advised not to reuse ICs, single-use noncoated ICs have the highest probability of being cost-effective. As current funding is limited in the outpatient setting, publicly funding noncoated multiple-use catheters (one per day) would result in a total additional cost of $93 million over the first 5 years. People who use ICs reported that the high ongoing cost of purchasing catheters was a financial burden. Almost all said they would prefer not to reuse catheters sold as "single use" but could not afford to do so. CONCLUSIONS Given the overall low quality of evidence in available studies, we are uncertain whether any specific type of IC (coated or noncoated, single- or multiple-use) significantly reduces symptomatic UTI, hematuria, or other serious adverse clinical events, or whether a specific type improves patient satisfaction. Therefore, the lowest-cost IC is likely the most cost-effective.
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Tsui C, Koss K, Churchward MA, Todd KG. Biomaterials and glia: Progress on designs to modulate neuroinflammation. Acta Biomater 2019; 83:13-28. [PMID: 30414483 DOI: 10.1016/j.actbio.2018.11.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 10/05/2018] [Accepted: 11/06/2018] [Indexed: 02/06/2023]
Abstract
Microglia are multi-functional cells that play a vital role in establishing and maintaining the function of the nervous system and determining the fate of neurons following injury or neuropathology. The roles of microglia are diverse and essential to the capacity of the nervous system to recover from injury, however sustained inflammation can limit recovery and drive chronic disease processes such as neurodegenerative disorders. When assessing implantable therapeutic devices in the central nervous system, an improved lifetime of the implant is considered achievable through the attenuation of microglial inflammation. Consequently, there is a tremendous underexplored potential in biomaterial and engineered design to modulate neuroinflammation for therapeutic benefit. Several strategies for improving device compatibility reviewed here include: biocompatible coatings, improved designs in finer and flexible shapes to reduce tissue shear-related scarring, and loading of anti-inflammatory drugs. Studies about microglial cell cultures in 3D hydrogels and nanoscaffolds to assess various injuries and disorders are also discussed. A variety of other microglia-targeting treatments are also reviewed, including nanoparticulate systems, cellular backpacks, and gold plinths, with the intention of delivering anti-inflammatory drugs by targeting the phagocytic nature of microglia. Overall, this review highlights recent advances in biomaterials targeting microglia and inflammatory function with the potential for improving implant rejection and biocompatibility studies. STATEMENT OF SIGNIFICANCE: Microglia are the resident immune cells of the central nervous system, and thus play a central role in the neuroinflammatory response against conditions than span acute injuries, neuropsychiatric disorders, and neurodegenerative disorders. This review article presents a summary of biomaterials research that target microglia and other glial cells in order to attenuate neuroinflammation, including but not limited to: design of mechanically compliant and biocompatible stimulation electrodes, hydrogels for high-throughput 3D modelling of nervous tissue, and uptake of nanoparticle drug delivery systems. The goal of this paper is to identify strengths and gaps in the relevant literature, and to promote further consideration of microglia behaviour and neuroinflammation in biomaterial design.
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Affiliation(s)
- C Tsui
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2R3, Canada; Department of Biomedical Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - K Koss
- Neurochemical Research Unit, Department of Psychiatry, University of Alberta, Edmonton, AB T6G 2R3, Canada; Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - M A Churchward
- Neurochemical Research Unit, Department of Psychiatry, University of Alberta, Edmonton, AB T6G 2R3, Canada; Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - K G Todd
- Neurochemical Research Unit, Department of Psychiatry, University of Alberta, Edmonton, AB T6G 2R3, Canada; Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2R3, Canada; Department of Biomedical Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada.
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Vitale F, Shen W, Driscoll N, Burrell JC, Richardson AG, Adewole O, Murphy B, Ananthakrishnan A, Oh H, Wang T, Lucas TH, Cullen DK, Allen MG, Litt B. Biomimetic extracellular matrix coatings improve the chronic biocompatibility of microfabricated subdural microelectrode arrays. PLoS One 2018; 13:e0206137. [PMID: 30383805 PMCID: PMC6211660 DOI: 10.1371/journal.pone.0206137] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 10/08/2018] [Indexed: 01/15/2023] Open
Abstract
Intracranial electrodes are a vital component of implantable neurodevices, both for acute diagnostics and chronic treatment with open and closed-loop neuromodulation. Their performance is hampered by acute implantation trauma and chronic inflammation in response to implanted materials and mechanical mismatch between stiff synthetic electrodes and pulsating, natural soft host neural tissue. Flexible electronics based on thin polymer films patterned with microscale conductive features can help alleviate the mechanically induced trauma; however, this strategy alone does not mitigate inflammation at the device-tissue interface. In this study, we propose a biomimetic approach that integrates microscale extracellular matrix (ECM) coatings on microfabricated flexible subdural microelectrodes. Taking advantage of a high-throughput process employing micro-transfer molding and excimer laser micromachining, we fabricate multi-channel subdural microelectrodes primarily composed of ECM protein material and demonstrate that the electrochemical and mechanical properties match those of standard, uncoated controls. In vivo ECoG recordings in rodent brain confirm that the ECM microelectrode coatings and the protein interface do not alter signal fidelity. Astrogliotic, foreign body reaction to ECM coated devices is reduced, compared to uncoated controls, at 7 and 30 days, after subdural implantation in rat somatosensory cortex. We propose microfabricated, flexible, biomimetic electrodes as a new strategy to reduce inflammation at the device-tissue interface and improve the long-term stability of implantable subdural electrodes.
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Affiliation(s)
- Flavia Vitale
- Center for Neuroengineering and Therapeutics, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Neurology, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Physical Medicine & Rehabilitation, University of Pennsylvania, Philadelphia PA, United States of America
- Center for Neurotrauma, Neurodegeneration & Restoration, Corporal Michael J. Crescenz VA Medical Center, Philadelphia PA, United States of America
| | - Wendy Shen
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia PA, United States of America
| | - Nicolette Driscoll
- Center for Neuroengineering and Therapeutics, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, United States of America
| | - Justin C. Burrell
- Center for Neurotrauma, Neurodegeneration & Restoration, Corporal Michael J. Crescenz VA Medical Center, Philadelphia PA, United States of America
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Neurosurgery, University of Pennsylvania, Philadelphia PA, United States of America
| | - Andrew G. Richardson
- Department of Neurosurgery, University of Pennsylvania, Philadelphia PA, United States of America
| | - Oladayo Adewole
- Center for Neurotrauma, Neurodegeneration & Restoration, Corporal Michael J. Crescenz VA Medical Center, Philadelphia PA, United States of America
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, United States of America
| | - Brendan Murphy
- Center for Neuroengineering and Therapeutics, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, United States of America
| | - Akshay Ananthakrishnan
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia PA, United States of America
| | - Hanju Oh
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia PA, United States of America
| | - Theodore Wang
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, United States of America
| | - Timothy H. Lucas
- Center for Neuroengineering and Therapeutics, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Neurosurgery, University of Pennsylvania, Philadelphia PA, United States of America
| | - D. Kacy Cullen
- Center for Neurotrauma, Neurodegeneration & Restoration, Corporal Michael J. Crescenz VA Medical Center, Philadelphia PA, United States of America
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Neurosurgery, University of Pennsylvania, Philadelphia PA, United States of America
| | - Mark G. Allen
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia PA, United States of America
| | - Brian Litt
- Center for Neuroengineering and Therapeutics, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Neurology, University of Pennsylvania, Philadelphia PA, United States of America
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, United States of America
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Dydak K, Junka A, Szymczyk P, Chodaczek G, Toporkiewicz M, Fijałkowski K, Dudek B, Bartoszewicz M. Development and biological evaluation of Ti6Al7Nb scaffold implants coated with gentamycin-saturated bacterial cellulose biomaterial. PLoS One 2018; 13:e0205205. [PMID: 30356274 PMCID: PMC6200220 DOI: 10.1371/journal.pone.0205205] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 09/20/2018] [Indexed: 11/18/2022] Open
Abstract
Herein we present an innovative method of coating the surface of Titanium-Aluminium-Niobium bone scaffold implants with bacterial cellulose (BC) polymer saturated with antibiotic. Customized Ti6Al7Nb scaffolds manufactured using Selective Laser Melting were immersed in a suspension of Komagataeibacter xylinus bacteria which displays an ability to produce a 3-dimensional structure of bio-cellulose polymer. The process of complete implant coating with BC took on average 7 days. Subsequently, the BC matrix was cleansed by means of alkaline lysis and saturated with gentamycin. Scanning electron microscopy revealed that BC adheres and penetrates into the implant scaffold structure. The viability and development of the cellular layer on BC micro-structure were visualized by means of confocal microscopy. The BC-coated implants displayed a significantly lower cytotoxicity against osteoblast and fibroblast cell cultures in vitro in comparison to non-coated implants. It was also noted that gentamycin released from BC-coated implants inhibited the growth of Staphylococcus aureus cultures in vitro, confirming the suitability of such implant modification for preventing hostile microbial colonization. As demonstrated using digital microscopy, the procedure used for implant coating and BC chemical cleansing did not flaw the biomaterial structure. The results presented herein are of high translational value with regard to future use of customized, BC-coated and antibiotic-saturated implants designed for use in orthopedic applications to speed up recovery and to reduce the risk of musculoskeletal infections.
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Affiliation(s)
- Karolina Dydak
- Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, Wrocław, Poland
| | - Adam Junka
- Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, Wrocław, Poland
| | - Patrycja Szymczyk
- Center for Advanced Manufacturing Technologies (CAMT/FPC), Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wrocław, Poland
| | - Grzegorz Chodaczek
- Laboratory of Confocal Microscopy, Polish Center for Technology Development PORT, Wrocław, Wrocław, Poland
| | - Monika Toporkiewicz
- Laboratory of Confocal Microscopy, Polish Center for Technology Development PORT, Wrocław, Wrocław, Poland
| | - Karol Fijałkowski
- Department of Immunology, Microbiology and Physiological Chemistry, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology, Szczecin, Szczecin, Poland
| | - Bartłomiej Dudek
- Laboratory of Microbiology, Polish Center for Technology Development PORT, Wrocław, Wrocław, Poland
| | - Marzenna Bartoszewicz
- Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, Wrocław, Poland
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Tolle C, Riedel J, Mikolai C, Winkel A, Stiesch M, Wirth D, Menzel H. Biocompatible Coatings from Smart Biopolymer Nanoparticles for Enzymatically Induced Drug Release. Biomolecules 2018; 8:E103. [PMID: 30274232 PMCID: PMC6315368 DOI: 10.3390/biom8040103] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 09/18/2018] [Accepted: 09/21/2018] [Indexed: 01/21/2023] Open
Abstract
Nanoparticles can be used as a smart drug delivery system, when they release the drug only upon degradation by specific enzymes. A method to create such responsive materials is the formation of hydrogel nanoparticles, which have enzymatically degradable crosslinkers. Such hydrogel nanoparticles were prepared by ionotropic gelation sodium alginate with lysine-rich peptide sequences-either α-poly-L-lysine (PLL) or the aggrecanase-labile sequence KKKK-GRD-ARGSV↓NITEGE-DRG-KKKK. The nanoparticle suspensions obtained were analyzed by means of dynamic light scattering and nanoparticle tracking analysis. Degradation experiments carried out with the nanoparticles in suspension revealed enzyme-induced lability. Drugs present in the polymer solution during the ionotropic gelation can be encapsulated in the nanoparticles. Drug loading was investigated for interferon-β (IFN-β) as a model, using a bioluminescence assay with MX2Luc2 cells. The encapsulation efficiency for IFN-β was found to be approximately 25%. The nanoparticles suspension can be used to spray-coat titanium alloys (Ti-6Al-4V) as a common implant material. The coatings were proven by ellipsometry, reflection-absorption infrared spectroscopy, and X-ray photoelectron spectroscopy. An enzyme-responsive decrease in layer thickness is observed due to the degradation of the coatings. The Alg/peptide coatings were cytocompatible for human gingival fibroblasts (HGFIB), which was investigated by CellTiterBlue and lactate dehydrogenase (LDH) assay. However, HGFIBs showed poor adhesion and proliferation on the Alg/peptide coatings, but these could be improved by modification of the alginate with a RGD-peptide sequence. The smart drug release system presented can be further tailored to have the right release kinetics and cell adhesion properties.
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Affiliation(s)
- Christian Tolle
- Institut für Technische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
| | - Jan Riedel
- Helmholtz-Zentrum für Infektionsforschung, Inhoffenstrasse 10, 38124 Braunschweig, Germany.
| | - Carina Mikolai
- Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
| | - Andreas Winkel
- Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
| | - Meike Stiesch
- Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
| | - Dagmar Wirth
- Helmholtz-Zentrum für Infektionsforschung, Inhoffenstrasse 10, 38124 Braunschweig, Germany.
| | - Henning Menzel
- Institut für Technische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
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Jeger RV, Farah A, Ohlow MA, Mangner N, Möbius-Winkler S, Leibundgut G, Weilenmann D, Wöhrle J, Richter S, Schreiber M, Mahfoud F, Linke A, Stephan FP, Mueller C, Rickenbacher P, Coslovsky M, Gilgen N, Osswald S, Kaiser C, Scheller B. Drug-coated balloons for small coronary artery disease (BASKET-SMALL 2): an open-label randomised non-inferiority trial. Lancet 2018; 392:849-856. [PMID: 30170854 DOI: 10.1016/s0140-6736(18)31719-7] [Citation(s) in RCA: 228] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 07/18/2018] [Accepted: 07/23/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND Drug-coated balloons (DCB) are a novel therapeutic strategy for small native coronary artery disease. However, their safety and efficacy is poorly defined in comparison with drug-eluting stents (DES). METHODS BASKET-SMALL 2 was a multicentre, open-label, randomised non-inferiority trial. 758 patients with de-novo lesions (<3 mm in diameter) in coronary vessels and an indication for percutaneous coronary intervention were randomly allocated (1:1) to receive angioplasty with DCB versus implantation of a second-generation DES after successful predilatation via an interactive internet-based response system. Dual antiplatelet therapy was given according to current guidelines. The primary objective was to show non-inferiority of DCB versus DES regarding major adverse cardiac events (MACE; ie, cardiac death, non-fatal myocardial infarction, and target-vessel revascularisation) after 12 months. The non-inferiority margin was an absolute difference of 4% in MACE. This trial is registered with ClinicalTrials.gov, number NCT01574534. FINDINGS Between April 10, 2012, and February 1, 2017, 382 patients were randomly assigned to the DCB group and 376 to DES group. Non-inferiority of DCB versus DES was shown because the 95% CI of the absolute difference in MACE in the per-protocol population was below the predefined margin (-3·83 to 3·93%, p=0·0217). After 12 months, the proportions of MACE were similar in both groups of the full-analysis population (MACE was 7·5% for the DCB group vs 7·3% for the DES group; hazard ratio [HR] 0·97 [95% CI 0·58-1·64], p=0·9180). There were five (1·3%) cardiac-related deaths in the DES group and 12 (3·1%) in the DCB group (full analysis population). Probable or definite stent thrombosis (three [0·8%] in the DCB group vs four [1·1%] in the DES group; HR 0·73 [0·16-3·26]) and major bleeding (four [1·1%] in the DCB group vs nine [2·4%] in the DES group; HR 0·45 [0·14-1·46]) were the most common adverse events. INTERPRETATION In small native coronary artery disease, DCB was non-inferior to DES regarding MACE up to 12 months, with similar event rates for both treatment groups. FUNDING Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Basel Cardiovascular Research Foundation, and B Braun Medical AG.
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Affiliation(s)
- Raban V Jeger
- University Hospital Basel, University of Basel, Basel, Switzerland.
| | - Ahmed Farah
- Knappschaftskrankhenhaus, Klinikum Westfalen, Dortmund, Germany
| | | | - Norman Mangner
- Herzzentrum Dresden, Technische Universität Dresden, Dresden, Germany; Heart Center Leipzig, University Hospital, Leipzig, Germany
| | | | | | | | | | | | | | | | - Axel Linke
- Herzzentrum Dresden, Technische Universität Dresden, Dresden, Germany; Heart Center Leipzig, University Hospital, Leipzig, Germany
| | | | | | | | | | - Nicole Gilgen
- University Hospital Basel, University of Basel, Basel, Switzerland
| | - Stefan Osswald
- University Hospital Basel, University of Basel, Basel, Switzerland
| | - Christoph Kaiser
- University Hospital Basel, University of Basel, Basel, Switzerland
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Ananth KP, Sun J, Bai J. An Innovative Approach to Manganese-Substituted Hydroxyapatite Coating on Zinc Oxide⁻Coated 316L SS for Implant Application. Int J Mol Sci 2018; 19:E2340. [PMID: 30096888 PMCID: PMC6122083 DOI: 10.3390/ijms19082340] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 07/22/2018] [Accepted: 07/23/2018] [Indexed: 01/06/2023] Open
Abstract
In this paper, the synthesis of porous manganese substituted hydroxyapatite (Mn-HAp) coating on zinc oxide (ZnO) coated stainless steel (316L SS) using the electrodeposition technique is reported. The structural, functional, morphological, and elemental analyses are characterized by various analytical techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Results of electrochemical techniques such as cyclic polarization and impedance show that the Mn-HAp coating on ZnO coated 316L SS has the highest corrosion resistance in simulated body fluid (SBF) solution. Moreover, dissolution of metal ions was extremely reduced, as evaluated by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). The adhesion and hardness of Mn-HAp/ZnO bilayer coatings have superior mechanical properties over individual coatings. Further, the biocompatibility of in vitro osteoblast attachment, cell viability, and live/dead assessment also confirmed the suitability of Mn-HAp/ZnO bilayer coating on 316L SS for orthopedic applications.
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Affiliation(s)
- Karuppasamy Prem Ananth
- Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials, Shenzhen 518055, China.
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Jinxing Sun
- Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials, Shenzhen 518055, China.
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Jiaming Bai
- Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials, Shenzhen 518055, China.
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
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Abstract
Implant infection is an aggressive, often irreducible post-surgical infection. It remains the primary cause of implant failure. Bacterial contamination during surgery and subsequent adhesion onto biomaterial surface of opportunistic microorganisms, such as staphylococcal species, exopolysaccharidic slimes or specific adhesins, initiates the implant infection. Pathogenesis of periprosthestic infection is the focus of studies aimed at developing infection resistant materials.
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Affiliation(s)
- C R Arciola
- Research Unit on Implant Infections, Rizzoli Orthopedic Institute, Bologna, Italy.
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Abstract
Progress made in the last two decades in chemical vapour deposition technology has enabled the production of inexpensive, high-quality coatings made from diamond to become a scientific and commercial reality. Two properties of diamond make it a highly desirable candidate material for biomedical applications: first, it is bioinert, meaning that there is minimal immune response when diamond is implanted into the body, and second, its electrical conductivity can be altered in a controlled manner, from insulating to near-metallic. In vitro, diamond can be used as a substrate upon which a range of biological cells can be cultured. In vivo, diamond thin films have been proposed as coatings for implants and prostheses. Here, we review a large body of data regarding the use of diamond substrates for in vitro cell culture. We also detail more recent work exploring diamond-coated implants with the main targets being bone and neural tissue. We conclude that diamond emerges as one of the major new biomaterials of the twenty-first century that could shape the way medical treatment will be performed, especially when invasive procedures are required.
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Affiliation(s)
- P A Nistor
- Regenerative Medicine Laboratory, University of Bristol, Bristol BS8 1TD, UK
| | - P W May
- School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
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Qin J, Zhao C, Wang D, Zhao B, Dong J, Li H, Sang R, Wang S, Fu J, Kong R, He X. An in vivo comparison study in goats for a novel motion-preserving cervical joint system. PLoS One 2017; 12:e0178775. [PMID: 28582418 PMCID: PMC5459456 DOI: 10.1371/journal.pone.0178775] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 05/18/2017] [Indexed: 11/20/2022] Open
Abstract
Cervical degenerative disease is one of the most common spinal disorders worldwide, especially in older people. Anterior cervical corpectomy and fusion (ACCF) is a useful method for the surgical treatment of multi-level cervical degenerative disease. Anterior cervical disc replacement (ACDR) is considered as an alternative surgical method. However, both methods have drawbacks, particularly the neck motion decrease observed after arthrodesis, and arthroplasty should only be performed on patients presenting with cervical disc disease but without any vertebral body disease. Therefore, we designed a non-fusion cervical joint system, namely an artificial cervical vertebra and intervertebral complex (ACVC), to provide a novel treatment for multi-level cervical degenerative disease. To enhance the long-term stability of ACVC, we applied a hydroxyapatite (HA) biocoating on the surface of the artificial joint. Thirty-two goats were randomly divided into four groups: a sham control group, an ACVC group, an ACVC-HA group, and an ACCF group (titanium and plate fixation group). We performed the prosthesis implantation in our previously established goat model. We compared the clinical, radiological, biomechanical, and histological outcomes among these four different groups for 24 weeks post surgery. The goats successfully tolerated the entire experimental procedure. The kinematics data for the ACVC and ACVC-HA groups were similar. The range of motion (ROM) in adjacent level increased after ACCF but was not altered after ACVC or ACVC-HA implantation. Compared with the control group, no significant difference was found in ROM and neutral zone (NZ) in flexion-extension or lateral bending for the ACVC and ACVC-HA groups, whereas the ROM and NZ in rotation were significantly greater. Compared with the ACCF group, the ROM and NZ significantly increased in all directions. Overall, stiffness was significantly decreased in the ACVC and ACVC-HA groups compared with the control group and the ACCF group. Similar results were found after a fatigue test of 5,000 repetitions of axial rotation. The histological results showed more new bone formation and better bone implant contact in the ACVC-HA group than the ACVC group. Goat is an excellent animal model for cervical spine biomechanical study. Compared with the intact state and the ACCF group, ACVC could provide immediate stability and preserve segmental movement after discectomy and corpectomy. Besides, HA biocoating provide a better bone ingrowth, which is essential for long-term stability. In conclusion, ACVC-HA brings new insight to treat cervical degenerative disease.
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Affiliation(s)
- Jie Qin
- The Department of Orthopedics, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P. R. of China
| | - Chenguang Zhao
- The Department of Rehabilitation, Xijing Hospital, Xi'an, Shaanxi Province, P.R. of China
| | - Dong Wang
- The Department of Orthopedics, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P. R. of China
| | - Bo Zhao
- The Department of Orthopedics, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P. R. of China
| | - Jun Dong
- The Department of Orthopedics, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P. R. of China
| | - Haopeng Li
- The Department of Orthopedics, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P. R. of China
| | - Rongxia Sang
- The Department of Gastroenterology, the First Hospital of Shijiazhuang, Shijiazhuang, Hebei Province, P.R. of China
| | - Shuang Wang
- Institute of Photonics and Photon-technology, Northwest University, Xi’an, Shaanxi Province, P.R. of China
| | - Jiao Fu
- The Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. of China
| | - Rangrang Kong
- The Department of Thoracic Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. of China
| | - Xijing He
- The Department of Orthopedics, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P. R. of China
- * E-mail:
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Schorn I, Malinoff H, Anderson S, Lecy C, Wang J, Giorgianni J, Papandreou G. The Lutonix® drug-coated balloon: A novel drug delivery technology for the treatment of vascular disease. Adv Drug Deliv Rev 2017; 112:78-87. [PMID: 28559093 DOI: 10.1016/j.addr.2017.05.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 05/17/2017] [Accepted: 05/25/2017] [Indexed: 11/18/2022]
Abstract
Local drug delivery of an anti-proliferative drug from balloon catheter systems to the site of arterial injury has been attempted repeatedly over the years with limited success in drug uptake and retention. Accessibility of the drug at the site is critical to combat the body's response to the procedural trauma of angioplasty. Recently, formulations have been designed which achieve delivery of therapeutic doses of the anti-proliferative drug paclitaxel to arteries with higher efficiency and longer tissue retention. These formulations succeed through formation of a drug reservoir in the artery wall enabling release after the initial angioplasty procedure. These formulations have become the cornerstone of several drug coated balloon (DCB) technologies which have found an initial, broad therapeutic application in the treatment of stenosis of the superficial femoral artery (SFA). DCBs achieve drug delivery while leaving no implant behind and represent a new class of combination products developed at the interface of engineering, chemistry and medical science. This review article summarizes the development of the LUTONIX® drug coated balloon catheter. The introduction of DCB technology has provided clinicians and patients with new SFA treatment options while ongoing clinical evidence in additional vascular beds is generated.
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Affiliation(s)
- Ian Schorn
- C.R. Bard, Inc., 9409 Science Center Drive, New Hope, MN 55428, United States
| | - Harrison Malinoff
- C.R. Bard, Inc., 9409 Science Center Drive, New Hope, MN 55428, United States
| | - Steven Anderson
- C.R. Bard, Inc., 9409 Science Center Drive, New Hope, MN 55428, United States
| | - Cyal Lecy
- C.R. Bard, Inc., 9409 Science Center Drive, New Hope, MN 55428, United States
| | - Jeffrey Wang
- C.R. Bard, Inc., 9409 Science Center Drive, New Hope, MN 55428, United States
| | - Joseph Giorgianni
- C.R. Bard, Inc., 9409 Science Center Drive, New Hope, MN 55428, United States
| | - George Papandreou
- C.R. Bard, Inc., 9409 Science Center Drive, New Hope, MN 55428, United States.
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Singha P, Locklin J, Handa H. A review of the recent advances in antimicrobial coatings for urinary catheters. Acta Biomater 2017; 50:20-40. [PMID: 27916738 PMCID: PMC5316300 DOI: 10.1016/j.actbio.2016.11.070] [Citation(s) in RCA: 230] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 11/30/2016] [Accepted: 11/30/2016] [Indexed: 12/21/2022]
Abstract
More than 75% of hospital-acquired or nosocomial urinary tract infections are initiated by urinary catheters, which are used during the treatment of 15-25% of hospitalized patients. Among other purposes, urinary catheters are primarily used for draining urine after surgeries and for urinary incontinence. During catheter-associated urinary tract infections, bacteria travel up to the bladder and cause infection. A major cause of catheter-associated urinary tract infection is attributed to the use of non-ideal materials in the fabrication of urinary catheters. Such materials allow for the colonization of microorganisms, leading to bacteriuria and infection, depending on the severity of symptoms. The ideal urinary catheter is made out of materials that are biocompatible, antimicrobial, and antifouling. Although an abundance of research has been conducted over the last forty-five years on the subject, the ideal biomaterial, especially for long-term catheterization of more than a month, has yet to be developed. The aim of this review is to highlight the recent advances (over the past 10years) in developing antimicrobial materials for urinary catheters and to outline future requirements and prospects that guide catheter materials selection and design. STATEMENT OF SIGNIFICANCE This review article intends to provide an expansive insight into the various antimicrobial agents currently being researched for urinary catheter coatings. According to CDC, approximately 75% of urinary tract infections are caused by urinary catheters and 15-25% of hospitalized patients undergo catheterization. In addition to these alarming statistics, the increasing cost and health related complications associated with catheter associated UTIs make the research for antimicrobial urinary catheter coatings even more pertinent. This review provides a comprehensive summary of the history, the latest progress in development of the coatings and a brief conjecture on what the future entails for each of the antimicrobial agents discussed.
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Affiliation(s)
- Priyadarshini Singha
- School of Materials, Chemical and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA, USA
| | - Jason Locklin
- School of Materials, Chemical and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA, USA; Department of Chemistry, University of Georgia, Athens, GA, USA.
| | - Hitesh Handa
- School of Materials, Chemical and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA, USA.
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Hasan J, Jain S, Chatterjee K. Nanoscale Topography on Black Titanium Imparts Multi-biofunctional Properties for Orthopedic Applications. Sci Rep 2017; 7:41118. [PMID: 28112235 PMCID: PMC5253769 DOI: 10.1038/srep41118] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 12/14/2016] [Indexed: 01/08/2023] Open
Abstract
We have developed a chlorine based reactive ion etching process to yield randomly oriented anisotropic nanostructures that render the titanium metal surface 'black' similar to that of black silicon. The surface appears black due to the nanostructures in contrast to the conventional shiny surface of titanium. The nanostructures were found to kill bacteria on contact by mechanically rupturing the cells as has been observed previously on wings of certain insects. The etching was optimized to yield nanostructures of ≈1 μm height for maximal bactericidal efficiency without compromising cytocompatibility. Within 4 hours of contact with the black titanium surface, 95% ± 5% of E. coli, 98% ± 2% of P. aeruginosa, 92% ± 5% of M. smegmatis and 22% ± 8% of S. aureus cells that had attached were killed. The killing efficiency for the S. aureus increased to 76% ± 4% when the cells were allowed to adhere up to 24 hours. The black titanium supported the attachment and proliferation of human mesenchymal stem cells and augmented osteogenic lineage commitment in vitro. Thus, the bioinspired nanostructures on black titanium impart multi-biofunctional properties toward engineering the next-generation biomaterials for orthopedic implants.
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Affiliation(s)
- Jafar Hasan
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Shubham Jain
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Kaushik Chatterjee
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
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Arokiaraj MC, Centeno A, Pesquera A, Zurutuza A. Novel graphene-coated mechanical bi-leaflet valves after accelerated wear test of 40M test cycles in saline. Acta Cardiol 2016; 71:331-47. [PMID: 27594129 DOI: 10.2143/ac.71.3.3152094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Lancellotti P, Oury C, Jerome C, Pierard LA. Graphene coating onto mechanical heart valve prosthesis and resistance to flow dynamics. Acta Cardiol 2016; 71:253-5. [PMID: 27594119 DOI: 10.2143/ac.71.3.3152084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Abstract
BACKGROUND The aim of this paper is to present the results of hip joint arthroplasty with the use of the Taperloc stem. MATERIAL AND METHODS The study group consisted of 117 patients (75 women and 42 men) who underwent 121 hip joint arthroplasties with Taperloc stems. Mean age of the patients at surgery was 53.8 years (range: 2475 years). Mean follow-up period was 159.5 months. RESULTS Pre-operative Merle d'Aubigne-Postel scores (modified by Charnley) of the study group were poor in all patients. Mean post-operative improvement was 6.6 points. Excellent results were obtained in 86 cases, good in 19, fair in 9 and poor in 7 cases. Poor results were always associated with implant component loosening: 5 cases of acetabular cup loosening, 1 case of a loosened stem and 1 septic loosening of the entire endoprosthesis. In six cases (4.9%), patients developed heterotopic ossification. According to the Kaplan-Meier estimator, 10 years' survival probability was 94.21% for the whole endoprosthesis and 98.34% for the stem alone. CONCLUSIONS 1. Our follow-up data covering a mean period of over 13 years showed that the use of the Ta-perloc stem substantially reduces hip pain and results in a good lasting clinical outcome. 2. With good surgical technique and in the absence of complications, the risk of aseptic loosening is minimal.
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Affiliation(s)
- Marek Drobniewski
- Department of Orthopaedics and Paediatric Orthopaedics of the Medical University of Lodz, Poland
| | - Andrzej Borowski
- Department of Orthopaedics and Paediatric Orthopaedics of the Medical University of Lodz, Poland
| | - Magdalena Krasińska
- Department of Orthopaedics and Paediatric Orthopaedics of the Medical University of Lodz, Poland
| | - Marcin Sibiński
- Department of Orthopaedics and Paediatric Orthopaedics of the Medical University of Lodz, Poland
| | - Marek Synder
- Department of Orthopaedics and Paediatric Orthopaedics of the Medical University of Lodz, Poland
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Khosravi A, Skrabal CA, Westphal B, Kundt G, Greim B, Kunesch E, Liebold A, Steinhoff G. Evaluation of coated oxygenators in cardiopulmonary bypass systems and their impact on neurocognitive function. Perfusion 2016; 20:249-54. [PMID: 16231620 DOI: 10.1191/0267659105pf818oa] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Introduction: Coronary artery bypass graft surgery (CABG) using cardiopulmonary bypass (CPB) is assumed to be associated with a decline of neurocognitive functions. This study was designed to analyse the neurocognitive function of patients with coronary heart disease before and after CABG and to determine possible protective effects of oxygenator surface coating on neurological outcome.Methods: Forty patients scheduled for selective CABG were prospectively randomized into two groups of 20 patients each according to the type of hollow-fibre membrane oxygenator used. Non-coated oxygenators (Group A) were compared to phosphorylcholine (PC)- coated oxygenators (Group B). A battery of six neurological tests was administered preoperatively, 7 - 10 days and 4 - 6 months after surgery.Results: One patient of Group A suffered from a perioperative stroke and died on postoperative day 3, presumably because of sudden heart failure. Two patients of Group A (10%) developed a symptomatic transitory delirious psychotic syndrome (STPT) on postoperative days 3 and 5. None of the patients of Group B had perioperative complications. The test analysis revealed a trend of declined neurocognitive function early after CABG, but did not show any difference in neurocognitive outcome between the two groups.Discussion: PC coating of the oxygenators did not show any significant benefit on neurocognitive function after CABG using CPB.
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Affiliation(s)
- Amir Khosravi
- Department of Cardiac Surgery, University of Rostock, Rostock, Germany
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