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Isa MT, Abdulkarim AY, Bello A, Bello TK, Adamu Y. Synthesis and characterization of chitosan for medical applications: A review. J Biomater Appl 2024; 38:1036-1057. [PMID: 38553786 DOI: 10.1177/08853282241243010] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Chitosan has gained considerable recognition within the field of medical applications due to its exceptional biocompatibility and diverse range of properties. Nevertheless, prior reviews have primarily focused on its applications, offering limited insights into its source materials. Hence, there arises a compelling need for a comprehensive review that encompasses the entire chitin and chitosan life cycle: from the source of chitin and chitosan, extraction methods, and specific medical applications, to the various techniques employed in evaluating chitosan's properties. This all-encompassing review delves into the critical aspects of chitin and chitosan extraction, with a strong emphasis on the utilization of natural raw materials. It elucidates the various sources of these raw materials, highlighting their abundance and accessibility. Furthermore, a meticulous examination of extraction methods reveals the prevalent use of hydrochloric acid (HCl) in the demineralization process, alongside citric, formic, and phosphoric acids. Based on current review information, these acids constitute a substantial 69.2% of utilization, surpassing other mentioned acids. Of notable importance, the review underscores the essential parameters for medical-grade chitosan. It advocates for a degree of deacetylation (DDA) falling within the range of 85%-95%, minimal protein content <1%, ash content <2%, and moisture content <10%. In conclusion, these crucial factors contribute to the understanding of Chitosan's production for medical applications, paving the way for advancements in biomedical research and development.
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Affiliation(s)
| | | | - Abdullahi Bello
- Bioresources Development Unit, National Biotechnology Research and Development Agency, Abuja, Nigeria
- Bioproduction Department, Bioresources Development Centre, Ilorin, Nigeria
| | | | - Yusuf Adamu
- Department of Chemical Engineering, Ahmadu Bello University, Zaria, Nigeria
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2
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Huitink JM. Airway triage: a novel application-based method for airway assessment and risk stratification. Br J Anaesth 2024; 132:987-990. [PMID: 38508944 DOI: 10.1016/j.bja.2024.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/12/2024] [Accepted: 02/12/2024] [Indexed: 03/22/2024] Open
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3
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Yan B, Cao D, Jiang X, Chen Y, Dai W, Dong F, Huang W, Zhang T, Gao C, Chen Q, Yan Z, Wang Z. FedEYE: A scalable and flexible end-to-end federated learning platform for ophthalmology. Patterns (N Y) 2024; 5:100928. [PMID: 38370128 PMCID: PMC10873155 DOI: 10.1016/j.patter.2024.100928] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/03/2023] [Accepted: 01/11/2024] [Indexed: 02/20/2024]
Abstract
Data-driven machine learning, as a promising approach, possesses the capability to build high-quality, exact, and robust models from ophthalmic medical data. Ophthalmic medical data, however, presently exist across disparate data silos with privacy limitations, making centralized training challenging. While ophthalmologists may not specialize in machine learning and artificial intelligence (AI), considerable impediments arise in the associated realm of research. To address these issues, we design and develop FedEYE, a scalable and flexible end-to-end ophthalmic federated learning platform. During FedEYE design, we adhere to four fundamental design principles, ensuring that ophthalmologists can effortlessly create independent and federated AI research tasks. Benefiting from the design principles and architecture of FedEYE, it encloses numerous key features, including rich and customizable capabilities, separation of concerns, scalability, and flexible deployment. We also validated the applicability of FedEYE by employing several prevalent neural networks on ophthalmic disease image classification tasks.
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Affiliation(s)
- Bingjie Yan
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Danmin Cao
- Aier Eye Hospital of Wuhan University, Wuhan, China
| | - Xinlong Jiang
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yiqiang Chen
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
- Peng Cheng Laboratory, Shenzhen, Guangdong, China
| | - Weiwei Dai
- Institute of Digital Ophthalmology and Visual Science, Changsha Aier Eye Hospital, Hunan, China
- AnHui Aier Eye Hospital, Anhui Medical University, Anhui, China
| | - Fan Dong
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Wuliang Huang
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Teng Zhang
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Chenlong Gao
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Qian Chen
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Zhen Yan
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Zhirui Wang
- Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
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4
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Almeida CMR, Merillas B, Pontinha ADR. Trends on Aerogel-Based Biosensors for Medical Applications: An Overview. Int J Mol Sci 2024; 25:1309. [PMID: 38279307 PMCID: PMC10816975 DOI: 10.3390/ijms25021309] [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: 12/11/2023] [Revised: 01/01/2024] [Accepted: 01/18/2024] [Indexed: 01/28/2024] Open
Abstract
Aerogels are unique solid-state materials composed of interconnected 3D solid networks and a large number of air-filled pores. This structure leads to extended structural characteristics as well as physicochemical properties of the nanoscale building blocks to macroscale, and integrated typical features of aerogels, such as high porosity, large surface area, and low density, with specific properties of the various constituents. Due to their combination of excellent properties, aerogels attract much interest in various applications, ranging from medicine to construction. In recent decades, their potential was exploited in many aerogels' materials, either organic, inorganic or hybrid. Considerable research efforts in recent years have been devoted to the development of aerogel-based biosensors and encouraging accomplishments have been achieved. In this work, recent (2018-2023) and ground-breaking advances in the preparation, classification, and physicochemical properties of aerogels and their sensing applications are presented. Different types of biosensors in which aerogels play a fundamental role are being explored and are collected in this manuscript. Moreover, the current challenges and some perspectives for the development of high-performance aerogel-based biosensors are summarized.
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Affiliation(s)
- Cláudio M. R. Almeida
- University of Coimbra, CERES, Department of Chemical Engineering, Rua Silvio Lima, 3030-790 Coimbra, Portugal; (C.M.R.A.); (B.M.)
- LAQV-REQUIMTE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Beatriz Merillas
- University of Coimbra, CERES, Department of Chemical Engineering, Rua Silvio Lima, 3030-790 Coimbra, Portugal; (C.M.R.A.); (B.M.)
- Cellular Materials Laboratory (CellMat), Condensed Matter Physics Department, Faculty of Science, University of Valladolid, Campus Miguel Delibes, Paseo de Belén 7, 47011 Valladolid, Spain
| | - Ana Dora Rodrigues Pontinha
- University of Coimbra, ISISE, ARISE, Department of Civil Engineering, 3030-788 Coimbra, Portugal
- SeaPower, Associação Para o Desenvolvimento da Economia do Mar, Rua Das Acácias, N° 40A, Parque Industrial Da Figueira Da Foz, 3090-380 Figueira Da Foz, Portugal
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Nikolova K, Velikova M, Gentscheva G, Gerasimova A, Slavov P, Harbaliev N, Makedonski L, Buhalova D, Petkova N, Gavrilova A. Chemical Compositions, Pharmacological Properties and Medicinal Effects of Genus Passiflora L.: A Review. Plants (Basel) 2024; 13:228. [PMID: 38256781 PMCID: PMC10820460 DOI: 10.3390/plants13020228] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/07/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024]
Abstract
Practically all aboveground plants parts of Passiflora vines can be included in the compositions of dietary supplements, medicines, and cosmetics. It has a diverse chemical composition and a wide range of biologically active components that determine its diverse pharmacological properties. Studies related to the chemical composition of the plant are summarized here, and attention has been paid to various medical applications-(1) anti-inflammatory, nephroprotective; (2) anti-depressant; (3) antidiabetic; (4) hepatoprotective; (5) antibacterial and antifungal; and (6) antipyretic and other. This review includes studies on the safety, synergistic effects, and toxicity that may occur with the use of various dietary supplements based on it. Attention has been drawn to its application in cosmetics and to patented products containing passionflower.
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Affiliation(s)
- Krastena Nikolova
- Department of Physics and Biophysics, Medical University-Varna, 9000 Varna, Bulgaria
| | - Margarita Velikova
- Department of Physiology, Medical University-Varna, 9000 Varna, Bulgaria;
| | - Galia Gentscheva
- Department of Chemistry and Biochemistry, Medical University-Pleven, 5800 Pleven, Bulgaria
| | - Anelia Gerasimova
- Department of Chemistry, Medical University-Varna, 9000 Varna, Bulgaria; (A.G.); (L.M.)
| | - Pavlo Slavov
- Faculty of Medicine, Medical University-Varna, 9000 Varna, Bulgaria; (P.S.)
| | - Nikolay Harbaliev
- Faculty of Medicine, Medical University-Varna, 9000 Varna, Bulgaria; (P.S.)
| | - Lubomir Makedonski
- Department of Chemistry, Medical University-Varna, 9000 Varna, Bulgaria; (A.G.); (L.M.)
| | - Dragomira Buhalova
- Department of Nutrient and Catering, University of Food Technology, 4002 Plovdiv, Bulgaria;
| | - Nadezhda Petkova
- Department of Organic Chemistry and Inorganic Chemistry, University of Food Technology, 4002 Plovdiv, Bulgaria;
| | - Anna Gavrilova
- Department of Pharmaceutical Chemistry and Pharmacognosy, Medical University-Pleven, 5800 Pleven, Bulgaria;
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Dhir R, Chauhan S, Subham P, Kumar S, Sharma P, Shidiki A, Kumar G. Plant-mediated synthesis of silver nanoparticles: unlocking their pharmacological potential-a comprehensive review. Front Bioeng Biotechnol 2024; 11:1324805. [PMID: 38264582 PMCID: PMC10803431 DOI: 10.3389/fbioe.2023.1324805] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 12/18/2023] [Indexed: 01/25/2024] Open
Abstract
In recent times, nanoparticles have experienced a significant upsurge in popularity, primarily owing to their minute size and their remarkable ability to modify physical, chemical, and biological properties. This burgeoning interest can be attributed to the expanding array of biomedical applications where nanoparticles find utility. These nanoparticles, typically ranging in size from 10 to 100 nm, exhibit diverse shapes, such as spherical, discoidal, and cylindrical configurations. These variations are not solely influenced by the manufacturing processes but are also intricately linked to interactions with surrounding stabilizing agents and initiators. Nanoparticles can be synthesized through physical or chemical methods, yet the biological approach emerges as the most sustainable and eco-friendly alternative among the three. Among the various nanoparticle types, silver nanoparticles have emerged as the most encountered and widely utilized due to their exceptional properties. What makes the synthesis of silver nanoparticles even more appealing is the application of plant-derived sources as reducing agents. This approach not only proves to be cost-effective but also significantly reduces the synthesis time. Notably, silver nanoparticles produced through plant-mediated processes have garnered considerable attention in recent years due to their notable medicinal capabilities. This comprehensive review primarily delves into the diverse medicinal attributes of silver nanoparticles synthesized using plant-mediated techniques. Encompassing antimicrobial properties, cytotoxicity, wound healing, larvicidal effects, anti-angiogenesis activity, antioxidant potential, and antiplasmodial activity, the paper extensively covers these multifaceted roles. Additionally, an endeavor is made to provide an elucidated summary of the operational mechanisms underlying the pharmacological actions of silver nanoparticles.
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Affiliation(s)
- Rajan Dhir
- Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India
| | - Sakshi Chauhan
- Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India
| | - Praddiuman Subham
- Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India
| | - Saksham Kumar
- Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India
| | - Pratham Sharma
- Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India
| | - Amrullah Shidiki
- Department of Microbiology, National Medical College and Teaching Hospital, Birgunj, Nepal
| | - Gaurav Kumar
- Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India
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Choi S, Sajib MRUZ, Manzano J, Chlebek CJ. mHealth Technology Experiences of Middle-Aged and Older Individuals With Visual Impairments: Cross-Sectional Interview Study. JMIR Form Res 2023; 7:e52410. [PMID: 38145472 PMCID: PMC10775026 DOI: 10.2196/52410] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 11/25/2023] [Accepted: 11/30/2023] [Indexed: 12/26/2023] Open
Abstract
BACKGROUND Current mobile health (mHealth) technology is predominantly designed with a visual orientation, often resulting in user interfaces that are inaccessible to visually impaired users. While mHealth technology offers potential for facilitating chronic illness management and enhancing health behaviors among visually impaired older populations, understanding its usage remains limited. OBJECTIVE This qualitative research aimed to explore the mHealth technology experiences of middle-aged and older individuals with visual impairments including the accessibility and usability issues they faced. METHODS The qualitative exploration was structured using the mHealth for Older Users framework. Cross-sectional interviews were conducted via Zoom between June 1 and July 31, 2023, using an interview protocol for data collection. A thematic analysis approach was employed to analyze the transcribed interview scripts. RESULTS Of the 7 participants who took part in the Zoom interviews, 3 were men and 4 were women, with ages ranging from 53 to 70 years. Most participants adopted mHealth apps and wearable devices for promoting health. They exhibited 3 distinct adoption patterns. Seven themes were emerged from the perceived challenges in using mHealth technologies: (1) a scarcity of accessible user manuals, (2) user interfaces that are not visually impaired-friendly, (3) health data visualizations that are not accessible, (4) unintuitive arrangement of app content, (5) health information that is challenging to comprehend, (6) cognitive overload caused by an excess of audible information, and (7) skepticism regarding the accuracy of health records. mHealth technologies seem to positively affect the health and health management of participants. CONCLUSIONS Design considerations for mHealth technologies should consider individuals' disabilities and chronic conditions and should emphasize the importance of providing accessible manuals and training opportunities when introducing new mHealth solutions.
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Affiliation(s)
- Soyoung Choi
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Md Refat Uz Zaman Sajib
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Jenna Manzano
- College of Liberal Arts and Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Christian Joseph Chlebek
- College of Liberal Arts and Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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8
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Pan LS, Wang WC, Yao MY, Wang XY, Zhang XZ. [Research progress on plant-derived exosome-like nanoparticles and their applications]. Zhongguo Zhong Yao Za Zhi 2023; 48:5977-5984. [PMID: 38114203 DOI: 10.19540/j.cnki.cjcmm.20230721.602] [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] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Plant-derived exosome-like nanoparticles(PELNs) are a class of membranous vesicles with diameters approximately ranging from 30 to 300 nm, isolated from plant tissues. They contain components such as proteins, lipids, and nucleic acids. PELNs play an important role in the metabolism of plant substances and immune defense, and can also cross-regulate the physiological activities of fungi and animal cells, showing significant potential applications. In recent years, research on PELNs has significantly increased, highlighting three main issues:(1) the mixed sources of plant materials for PELNs;(2) the lack of a unified system for isolating and characterizing PELNs;(3) the urgent need to elucidate the molecular mechanisms underlying the cross-regulation of biological functions by PELNs. This article focused on these concerns. It began by summarizing the biological origin and composition of PELNs, discussing the techniques for isolating and characterizing PELNs, and analyzing their biomedical applications and potential future research directions., aiming to promote the establishment of standardized research protocols for PELNs and provide theoretical references for in-depth exploration of the mechanisms underlying PELNs' cross-regulatory effects.
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Affiliation(s)
- Lin-Si Pan
- College of Horticulture and Landscape Architecture, Zhongkai University of Agriculture and Engineering Guangzhou 510225, China
| | - Wen-Cai Wang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine Guangzhou 510405, China
| | - Meng-Yu Yao
- Department of Orthopedics, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Science,Southern Medical University Guangzhou 510000, China
| | - Xiao-Yan Wang
- Doctor Workstation, Lianjiang People's Hospital Affiliated to Guangdong Medical University Zhanjiang 524400, China
| | - Xian-Zhi Zhang
- College of Horticulture and Landscape Architecture, Zhongkai University of Agriculture and Engineering Guangzhou 510225, China
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Hirano SI, Ichikawa Y, Sato B, Takefuji Y, Satoh F. Clinical Use and Treatment Mechanism of Molecular Hydrogen in the Treatment of Various Kidney Diseases including Diabetic Kidney Disease. Biomedicines 2023; 11:2817. [PMID: 37893190 PMCID: PMC10603947 DOI: 10.3390/biomedicines11102817] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
As diabetes rates surge globally, there is a corresponding rise in the number of patients suffering from diabetic kidney disease (DKD), a common complication of diabetes. DKD is a significant contributor to chronic kidney disease, often leading to end-stage renal failure. However, the effectiveness of current medical treatments for DKD leaves much to be desired. Molecular hydrogen (H2) is an antioxidant that selectively reduces hydroxyl radicals, a reactive oxygen species with a very potent oxidative capacity. Recent studies have demonstrated that H2 not only possesses antioxidant properties but also exhibits anti-inflammatory effects, regulates cell lethality, and modulates signal transduction. Consequently, it is now being utilized in clinical applications. Many factors contribute to the onset and progression of DKD, with mitochondrial dysfunction, oxidative stress, and inflammation being strongly implicated. Recent preclinical and clinical trials reported that substances with antioxidant properties may slow the progression of DKD. Hence, we undertook a comprehensive review of the literature focusing on animal models and human clinical trials where H2 demonstrated effectiveness against a variety of renal diseases. The collective evidence from this literature review, along with our previous findings, suggests that H2 may have therapeutic benefits for patients with DKD by enhancing mitochondrial function. To substantiate these findings, future large-scale clinical studies are needed.
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Affiliation(s)
- Shin-ichi Hirano
- Department of Research and Development, MiZ Company Limited, 2-19-15 Ofuna, Kamakura 247-0056, Japan; (Y.I.); (B.S.); (F.S.)
| | - Yusuke Ichikawa
- Department of Research and Development, MiZ Company Limited, 2-19-15 Ofuna, Kamakura 247-0056, Japan; (Y.I.); (B.S.); (F.S.)
| | - Bunpei Sato
- Department of Research and Development, MiZ Company Limited, 2-19-15 Ofuna, Kamakura 247-0056, Japan; (Y.I.); (B.S.); (F.S.)
| | - Yoshiyasu Takefuji
- Keio University, 2-15-45 Mita, Minato-ku, Tokyo 108-8345, Japan;
- Faculty of Data Science, Musashino University, 3-3-3 Ariake, Koto-ku, Tokyo 135-8181, Japan
| | - Fumitake Satoh
- Department of Research and Development, MiZ Company Limited, 2-19-15 Ofuna, Kamakura 247-0056, Japan; (Y.I.); (B.S.); (F.S.)
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Narasimhan G, Victor A. Analysis of computational intelligence approaches for predicting disease severity in humans: Challenges and research guidelines. J Educ Health Promot 2023; 12:334. [PMID: 38023081 PMCID: PMC10671019 DOI: 10.4103/jehp.jehp_298_23] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/12/2023] [Indexed: 12/01/2023]
Abstract
The word disease is a common word and there are many diseases like heart disease, diabetes, breast cancer, COVID-19, and kidney disease that threaten humans. Data-mining methods are proving to be increasingly beneficial in the present day, especially in the field of medical applications; through the use of machine-learning methods, that are used to extract valuable information from healthcare data, which can then be used to predict and treat diseases early, reducing the risk of human life. Machine-learning techniques are useful especially in the field of health care in extracting information from healthcare data. These data are very much helpful in predicting the disease early and treating the patients to reduce the risk of human life. For classification and decision-making, data mining is very much suitable. In this paper, a comprehensive study on several diseases and diverse machine-learning approaches that are functional to predict those diseases and also the different datasets used in prediction and making decisions are discussed in detail. The drawbacks of the models from various research papers have been observed and reveal countless computational intelligence approaches. Naïve Bayes, logistic regression (LR), SVM, and random forest are able to produce the best accuracy. With further optimization algorithms like genetic algorithm, particle swarm optimization, and ant colony optimization combined with machine learning, better performance can be achieved in terms of accuracy, specificity, precision, recall, and specificity.
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Affiliation(s)
- Geetha Narasimhan
- School of Computer Science and Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - Akila Victor
- School of Computer Science and Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India
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Zainuddin MZ, Abu Bakar AA, Adam AN, Abdullah SM, Tamchek N, Alauddin MS, Mahat MM, Wiwatcharagoses N, Alforidi A, Ghazali MIM. Mechanical and Structural Properties of Polyhydroxybutyrate as Additive in Blend Material in Additive Manufacturing for Medical Applications. Polymers (Basel) 2023; 15:polym15081849. [PMID: 37111996 PMCID: PMC10145977 DOI: 10.3390/polym15081849] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/24/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
Today, additive manufacturing (AM) is considered one of the vital tenets of the industry 4.0 revolution due to its high productivity, decentralized production and rapid prototyping. This work aims to study the mechanical and structural properties of polyhydroxybutyrate as an additive in blend materials and its potential in medical applications. PHB/PUA blend resins were formulated with 0 wt.%, 6 wt.%, 12 wt.% and 18 wt.% of PHB concentration. Stereolithography or an SLA 3D printing technique were used to evaluate the printability of the PHB/PUA blend resins. Additionally, from FESEM analysis, a change was observed in PUA's microstructure, with an additional number of voids spotted. Furthermore, from XRD analysis, as PHB concentration increased, the crystallinity index (CI) also increased. This indicates the brittleness properties of the materials, which correlated to the weak performance of the tensile and impact properties. Next, the effect of PHB loading concentration within PHB/PUA blends and aging duration towards the mechanical performance of tensile and impact properties was also studied by using analysis of variance (ANOVA) with a two-way method. Finally, 12 wt.% of PHB/PUA was selected to 3D print the finger splint due to its characteristics, which are compatible to be used in finger bone fracture recovery.
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Affiliation(s)
- Muhammad Zulhilmi Zainuddin
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
| | - Ahmad Adnan Abu Bakar
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
| | - Ahmad Nurhelmy Adam
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
| | - Shahino Mah Abdullah
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
| | - Nizam Tamchek
- Department of Physics, Faculty of Science, Universiti Putra Malaysia (UPM), Serdang 43400, Malaysia
| | - Muhammad Syafiq Alauddin
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
- Department of Conservative Dentistry and Prosthodontics, Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur 55100, Malaysia
| | - Mohd Muzamir Mahat
- Faculty of Applied Sciences, Universiti Teknologi Mara, Shah Alam 40450, Selangor, Malaysia
| | - Nophadon Wiwatcharagoses
- Department of Electrical and Computer Engineering, King Mongkut's University of Technology North Bangkok (KMUTNB) 1518 Pracharat 1 Road, Bangkok 10800, Thailand
| | - Ahmad Alforidi
- Electrical Engineering Department, Taibah University, Medina 42353, Saudi Arabia
| | - Mohd Ifwat Mohd Ghazali
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
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Tsagogiorgas C, Otto M. Semifluorinated Alkanes as New Drug Carriers-An Overview of Potential Medical and Clinical Applications. Pharmaceutics 2023; 15:pharmaceutics15041211. [PMID: 37111696 PMCID: PMC10146824 DOI: 10.3390/pharmaceutics15041211] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/31/2023] [Accepted: 04/03/2023] [Indexed: 04/29/2023] Open
Abstract
Fluorinated compounds have been used in clinical and biomedical applications for years. The newer class of semifluorinated alkanes (SFAs) has very interesting physicochemical properties including high gas solubility (e.g., for oxygen) and low surface tensions, such as the well-known perfluorocarbons (PFC). Due to their high propensity to assemble to interfaces, they can be used to formulate a variety of multiphase colloidal systems, including direct and reverse fluorocarbon emulsions, microbubbles and nanoemulsions, gels, dispersions, suspensions and aerosols. In addition, SFAs can dissolve lipophilic drugs and thus be used as new drug carriers or in new formulations. In vitreoretinal surgery and as eye drops, SFAs have become part of daily clinical practice. This review provides brief background information on the fluorinated compounds used in medicine and discusses the physicochemical properties and biocompatibility of SFAs. The clinically established use in vitreoretinal surgery and new developments in drug delivery as eye drops are described. The potential clinical applications for oxygen transport by SFAs as pure fluids into the lungs or as intravenous applications of SFA emulsions are presented. Finally, aspects of drug delivery with SFAs as topical, oral, intravenous (systemic) and pulmonary applications as well as protein delivery are covered. This manuscript provides an overview of the (potential) medical applications of semifluorinated alkanes. The databases of PubMed and Medline were searched until January 2023.
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Affiliation(s)
- Charalambos Tsagogiorgas
- Department of Anaesthesiology and Critical Care Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany
- Department of Anaesthesiology and Critical Care Medicine, St. Elisabethen-Krankenhaus, Teaching Hospital of the University of Frankfurt, 60487 Frankfurt, Germany
| | - Matthias Otto
- Department of Anaesthesiology and Critical Care Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany
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13
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Nan X, Yang L, Cui Y. Lateral Flow Immunoassay for Proteins. Clin Chim Acta 2023; 544:117337. [PMID: 37044163 DOI: 10.1016/j.cca.2023.117337] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 04/07/2023] [Accepted: 04/07/2023] [Indexed: 04/14/2023]
Abstract
Protein biomarkers are useful for disease diagnosis. Identification thereof using in vitro diagnostics such as lateral flow immunoassays (LFIAs) has attracted considerable attention due to their low cost and ease of use especially in the point of care setting. Current challenges, however, do remain with respect to material selection for each component in the device and the synergistic integration of these components to display detectable signals. This review explores the principle of LFIA for protein biomarkers, device components including biomaterials and labeling methods. Medical applications and commercial status are examined as well. This review highlights critical methodologies in the development of new LFIAs and their role in advancing healthcare worldwide.
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Affiliation(s)
- Xuanxu Nan
- School of Materials Science and Engineering, Peking University; First Hospital Interdisciplinary Research Center, Peking University, Beijing 100871, P.R. China
| | - Li Yang
- Renal Division, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing 100034, P. R. China.
| | - Yue Cui
- School of Materials Science and Engineering, Peking University; First Hospital Interdisciplinary Research Center, Peking University, Beijing 100871, P.R. China.
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14
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Gentscheva G, Nikolova K, Panayotova V, Peycheva K, Makedonski L, Slavov P, Radusheva P, Petrova P, Yotkovska I. Application of Arthrospira platensis for Medicinal Purposes and the Food Industry: A Review of the Literature. Life (Basel) 2023; 13:life13030845. [PMID: 36984000 PMCID: PMC10058336 DOI: 10.3390/life13030845] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 02/21/2023] [Accepted: 03/19/2023] [Indexed: 03/30/2023] Open
Abstract
Arthrospira platensis is a filamentous cyanobacterium of the class Cyanophyceae and is the most cultivated photosynthetic prokaryote. It is used in the pharmaceutical sector, medicine and the food industry. It has a rich micro- and macro-element composition, containing proteins, lipids, carbohydrates, essential amino acids, polyunsaturated fatty acids, minerals and raw fibers. It is a commonly used ingredient in food products and nutritional supplements. The wide range of biologically active components determines its diverse pharmacological properties (antioxidant, antidiabetic, antimicrobial, antineoplastic, antitumor, anti-inflammatory, photoprotective, antiviral, etc.). This review summarizes research related to the taxonomy, distribution and chemical composition of Arthrospira platensis as well as its potential application in the food and pharmaceutical industries. Attention is drawn to its various medical applications as an antidiabetic and antiobesity agent, with hepatoprotective, antitumor, antimicrobial and antiviral effects as well as regulatory effects on neurodegenerative diseases.
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Affiliation(s)
- Galia Gentscheva
- Department of Chemistry and Biochemistry, Medical University-Pleven, 5800 Pleven, Bulgaria
| | - Krastena Nikolova
- Department of Physics and Biophysics, Medical University-Varna, 9000 Varna, Bulgaria
| | | | - Katya Peycheva
- Department of Chemistry, Medical University-Varna, 9000 Varna, Bulgaria
| | | | - Pavlo Slavov
- Student of Medicine, Medical University-Varna, 9000 Varna, Bulgaria
| | - Poli Radusheva
- Department of Physics and Biophysics, Medical University-Varna, 9000 Varna, Bulgaria
| | - Petia Petrova
- Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Ina Yotkovska
- Department of Chemistry and Biochemistry, Medical University-Pleven, 5800 Pleven, Bulgaria
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15
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Piekarska K, Sikora M, Owczarek M, Jóźwik-Pruska J, Wiśniewska-Wrona M. Chitin and Chitosan as Polymers of the Future-Obtaining, Modification, Life Cycle Assessment and Main Directions of Application. Polymers (Basel) 2023; 15:polym15040793. [PMID: 36850077 PMCID: PMC9959150 DOI: 10.3390/polym15040793] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/30/2023] [Accepted: 02/01/2023] [Indexed: 02/09/2023] Open
Abstract
Natural polymers are very widespread in the world, which is why it is so important to know about the possibilities of their use. Chitin is the second most abundant reproducible natural polymer in nature; however, it is insoluble in water and basic solvents. Chitin is an unused waste of the food industry, for which there are possibilities of secondary management. The research led to obtaining a soluble, environmentally friendly form of chitin, which has found potential applications in the many fields, e.g., medicine, cosmetics, food and textile industries, agriculture, etc. The deacetylated form of chitin, which is chitosan, has a number of beneficial properties and wide possibilities of modification. Modification possibilities mean that we can obtain chitosan with the desired functional properties, facilitating, for example, the processing of this polymer and expanding the possibilities of its application, also as biomimetic materials. The review contains a rich description of the possibilities of modifying chitin and chitosan and the main directions of their application, and life cycle assessment (LCA)-from the source of the polymer through production materials to various applications with the reduction of waste.
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16
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Marchot P, Benoit É, Fajloun Z, Diochot S. Report from the 28th Meeting on Toxinology, "Toxins: What's up, Doc?", Organized by the French Society of Toxinology on 28-29 November 2022. Toxins (Basel) 2023; 15. [PMID: 36828440 DOI: 10.3390/toxins15020126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 01/24/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
The French Society of Toxinology (SFET) organized its 28th annual meeting on 28-29 November 2022 (RT28). The central theme of this meeting was "Toxins: What's up, Doc?", emphasizing the latest findings on animal, bacterial, algal, plant and fungal toxins through sessions dedicated to deep learning, toxin tracking and toxinomic advances, shared by ca. 80 participants. The abstracts of the 10 invited and 11 selected lectures and 15 posters, along with the names of the Best Oral Communication and Best Poster awardees, are presented in this report.
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17
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Zhu Q, Wu T, Wang N. From Piezoelectric Nanogenerator to Non-Invasive Medical Sensor: A Review. Biosensors (Basel) 2023; 13:113. [PMID: 36671948 PMCID: PMC9856170 DOI: 10.3390/bios13010113] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/01/2023] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Piezoelectric nanogenerators (PENGs) not only are able to harvest mechanical energy from the ambient environment or body and convert mechanical signals into electricity but can also inform us about pathophysiological changes and communicate this information using electrical signals, thus acting as medical sensors to provide personalized medical solutions to patients. In this review, we aim to present the latest advances in PENG-based non-invasive sensors for clinical diagnosis and medical treatment. While we begin with the basic principles of PENGs and their applications in energy harvesting, this review focuses on the medical sensing applications of PENGs, including detection mechanisms, material selection, and adaptive design, which are oriented toward disease diagnosis. Considering the non-invasive in vitro application scenario, discussions about the individualized designs that are intended to balance a high performance, durability, comfortability, and skin-friendliness are mainly divided into two types: mechanical sensors and biosensors, according to the key role of piezoelectric effects in disease diagnosis. The shortcomings, challenges, and possible corresponding solutions of PENG-based medical sensing devices are also highlighted, promoting the development of robust, reliable, scalable, and cost-effective medical systems that are helpful for the public.
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Affiliation(s)
- Qiliang Zhu
- Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Tong Wu
- Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
- National Institute of Metrology, Beijing 100029, China
| | - Ning Wang
- Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
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18
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Wang J, Dai D, Xie H, Li D, Xiong G, Zhang C. Biological Effects, Applications and Design Strategies of Medical Polyurethanes Modified by Nanomaterials. Int J Nanomedicine 2022; 17:6791-6819. [PMID: 36600880 PMCID: PMC9807071 DOI: 10.2147/ijn.s393207] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/20/2022] [Indexed: 12/30/2022] Open
Abstract
Polyurethane (PU) has wide application and popularity as medical apparatus due to its unique structural properties relationship. However, there are still some problems with medical PUs, such as a lack of functionality, insufficient long-term implantation safety, undesired stability, etc. With the rapid development of nanotechnology, the nanomodification of medical PU provides new solutions to these clinical problems. The introduction of nanomaterials could optimize the biocompatibility, antibacterial effect, mechanical strength, and degradation of PUs via blending or surface modification, therefore expanding the application range of medical PUs. This review summarizes the current applications of nano-modified medical PUs in diverse fields. Furthermore, the underlying mechanisms in efficiency optimization are analyzed in terms of the enhanced biological and mechanical properties critical for medical use. We also conclude the preparation schemes and related parameters of nano-modified medical PUs, with discussions about the limitations and prospects. This review indicates the current status of nano-modified medical PUs and contributes to inspiring novel and appropriate designing of PUs for desired clinical requirements.
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Affiliation(s)
- Jianrong Wang
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, People’s Republic of China
| | - Danni Dai
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, People’s Republic of China
| | - Hanshu Xie
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, People’s Republic of China
| | - Dan Li
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, People’s Republic of China
| | - Gege Xiong
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, People’s Republic of China
| | - Chao Zhang
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, People’s Republic of China,Correspondence: Chao Zhang, Email
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19
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Ren B, Jiang K, Lou M, Su Y, Yang Z, Feng J. [Discussion on Construction Framework and Key Content of Integrated Medical Internet of Things]. Zhongguo Yi Liao Qi Xie Za Zhi 2022; 46:686-690. [PMID: 36597400 DOI: 10.3969/j.issn.1671-7104.2022.06.020] [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] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Since the internet of things was listed as a national emerging strategic industry, its development in China has received unprecedented attention. This study takes the lead in proposing the concept and construction framework of the integrated medical internet of things, analyses and discusses the integrated medical internet of things from four aspects: the integrated internet of things infrastructure, the internet of things security management application construction, the internet of things big data application construction, and the integrated management platform. The integrated medical internet of things starts from medical management, based on the hospital's existing information construction foundation, and uses internet of things related technologies to build an internet of things integrated service platform for medical quality and safety.
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Affiliation(s)
- Bin Ren
- The First Affiliated Hospital of Air Force Military Medical University, Xi'an, 710032
| | - Kun Jiang
- The First Affiliated Hospital of Air Force Military Medical University, Xi'an, 710032
| | - Miaomiao Lou
- The First Affiliated Hospital of Air Force Military Medical University, Xi'an, 710032
| | - Yucheng Su
- The First Affiliated Hospital of Air Force Military Medical University, Xi'an, 710032
| | - Zhe Yang
- The First Affiliated Hospital of Air Force Military Medical University, Xi'an, 710032
| | - Juan Feng
- The First Affiliated Hospital of Air Force Military Medical University, Xi'an, 710032
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20
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Wang X, Li J, Shang J, Bai J, Wu K, Liu J, Yang Z, Ou H, Shao L. Metabolites extracted from microorganisms as potential inhibitors of glycosidases (α-glucosidase and α-amylase): A review. Front Microbiol 2022; 13:1050869. [PMID: 36466660 PMCID: PMC9712454 DOI: 10.3389/fmicb.2022.1050869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 10/17/2022] [Indexed: 09/30/2023] Open
Abstract
α-Glucosidase and α-amylase are the two main glycosidases that participate in the metabolism of carbohydrates. Inhibitors of these two enzymes are considered an important medical treatment for carbohydrate uptake disorders, such as diabetes and obesity. Microbes are an important source of constituents that have the potential to inhibit glycosidases and can be used as sources of new drugs and dietary supplements. For example, the α-glucosidase inhibitor acarbose, isolated from Actinoplanes sp., has played an important role in adequately controlling type 2 diabetes, but this class of marketed drugs has many drawbacks, such as poor compliance with treatment and expense. This demonstrates the need for new microorganism-derived resources, as well as novel classes of drugs with better compliance, socioeconomic benefits, and safety. This review introduces the literature on microbial sources of α-glucosidase and α-amylase inhibitors, with a focus on endophytes and marine microorganisms, over the most recent 5 years. This paper also reviews the application of glycosidase inhibitors as drugs and dietary supplements. These studies will contribute to the future development of new microorganism-derived glycosidase inhibitors.
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Affiliation(s)
- Xiaojing Wang
- Affiliated Zhoupu Hospital, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Jiaying Li
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Shanghai University of Medicine and Health Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jiaqi Shang
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Jing Bai
- School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou, China
| | - Kai Wu
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Jing Liu
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Medical Technology, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Zhijun Yang
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Hao Ou
- Department of Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lei Shao
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
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21
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Abu Bakar AA, Zainuddin MZ, Abdullah SM, Tamchek N, Mohd Noor IS, Alauddin MS, Alforidi A, Mohd Ghazali MI. The 3D Printability and Mechanical Properties of Polyhydroxybutyrate (PHB) as Additives in Urethane Dimethacrylate (UDMA) Blends Polymer for Medical Application. Polymers (Basel) 2022; 14:4518. [PMID: 36365512 PMCID: PMC9657082 DOI: 10.3390/polym14214518] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/21/2022] [Accepted: 10/21/2022] [Indexed: 04/12/2024] Open
Abstract
The integration of additive manufacturing (3D printing) in the biomedical sector required material to portray a holistic characteristic in terms of printability, biocompatibility, degradability, and mechanical properties. This research aims to evaluate the 3D printability and mechanical properties of polyhydroxybutyrate (PHB) as additives in the urethane dimethacrylate (UDMA) based resin and its potential for medical applications. The printability of the PHB/UDMA resin blends was limited to 11 wt.% as it reached the maximum viscosity value at 2188 cP. Two-way analysis of variance (ANOVA) was also conducted to assess the significant effect of the varied PHB (wt.%) incorporation within UDMA resin, and the aging duration of 3D printed PHB/UDMA on mechanical properties in terms of tensile and impact properties. Meanwhile, the increasing crystallinity index (CI) of X-ray diffraction (XRD) in the 3D printed PHB/UDMA as the PHB loading increased, indicating that there is a strong correlation with the lower tensile and impact strength. FESEM images also proved that the agglomerations that occurred within the UDMA matrix had affected the mechanical performance of 3D printed PHB/UDMA. Nonetheless, the thermal stability of the 3D printed PHB/UDMA had only a slight deviation from the 3D printed UDMA since it had better thermal processability.
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Affiliation(s)
- Ahmad Adnan Abu Bakar
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
| | - Muhammad Zulhilmi Zainuddin
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
| | - Shahino Mah Abdullah
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
| | - Nizam Tamchek
- Department of Physics, Faculty of Science, Universiti Putra Malaysia (UPM), Serdang 43400, Malaysia
| | - Ikhwan Syafiq Mohd Noor
- Physics Division, Centre of Foundation Studies for Agricultural Science, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Muhammad Syafiq Alauddin
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
- Department of Conservative Dentistry and Prosthodontics, Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur 55100, Malaysia
| | - Ahmad Alforidi
- Electrical Engineering Department, Taibah University, Medina 42353, Saudi Arabia
| | - Mohd Ifwat Mohd Ghazali
- SMART RG, Faculty of Science and Technology (FST), Universiti Sains Islam Malaysia (USIM), Nilai 71800, Malaysia
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22
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Rupert R, Rodrigues KF, Thien VY, Yong WTL. Carrageenan From Kappaphycus alvarezii (Rhodophyta, Solieriaceae): Metabolism, Structure, Production, and Application. Front Plant Sci 2022; 13:859635. [PMID: 35620679 PMCID: PMC9127731 DOI: 10.3389/fpls.2022.859635] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
Carrageenan is a polysaccharide derived from red algae (seaweed) with enormous economic potential in a wide range of industries, including pharmaceuticals, food, cosmetics, printing, and textiles. Carrageenan is primarily produced through aquaculture-based seaweed farming, with Eucheuma and Kappaphycus species accounting for more than 90% of global output. There are three major types of carrageenan found in red algae: kappa (κ)-, iota (ι)-, and lambda (λ)-carrageenan. Kappaphycus alvarezii is the most common kappa-carrageenan source, and it is primarily farmed in Asian countries such as Indonesia, the Philippines, Vietnam, and Malaysia. Carrageenan extracted from K. alvarezii has recently received a lot of attention due to its economic potential in a wide range of applications. This review will discuss K. alvarezii carrageenan in terms of metabolic and physicochemical structure, extraction methods and factors affecting production yield, as well as current and future applications.
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Affiliation(s)
- Rennielyn Rupert
- Biotechnology Research Institute, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | | | - Vun Yee Thien
- Innovation Center, Xiamen University Malaysia, Sunsuria, Malaysia
| | - Wilson Thau Lym Yong
- Biotechnology Research Institute, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
- Seaweed Research Unit, Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
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23
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Ho TC, Chang CC, Chan HP, Chung TW, Shu CW, Chuang KP, Duh TH, Yang MH, Tyan YC. Hydrogels: Properties and Applications in Biomedicine. Molecules 2022; 27:2902. [PMID: 35566251 PMCID: PMC9104731 DOI: 10.3390/molecules27092902] [Citation(s) in RCA: 84] [Impact Index Per Article: 42.0] [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: 03/09/2022] [Revised: 04/17/2022] [Accepted: 04/20/2022] [Indexed: 12/19/2022] Open
Abstract
Hydrogels are crosslinked polymer chains with three-dimensional (3D) network structures, which can absorb relatively large amounts of fluid. Because of the high water content, soft structure, and porosity of hydrogels, they closely resemble living tissues. Research in recent years shows that hydrogels have been applied in various fields, such as agriculture, biomaterials, the food industry, drug delivery, tissue engineering, and regenerative medicine. Along with the underlying technology improvements of hydrogel development, hydrogels can be expected to be applied in more fields. Although not all hydrogels have good biodegradability and biocompatibility, such as synthetic hydrogels (polyvinyl alcohol, polyacrylamide, polyethylene glycol hydrogels, etc.), their biodegradability and biocompatibility can be adjusted by modification of their functional group or incorporation of natural polymers. Hence, scientists are still interested in the biomedical applications of hydrogels due to their creative adjustability for different uses. In this review, we first introduce the basic information of hydrogels, such as structure, classification, and synthesis. Then, we further describe the recent applications of hydrogels in 3D cell cultures, drug delivery, wound dressing, and tissue engineering.
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Affiliation(s)
- Tzu-Chuan Ho
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-C.H.); (C.-W.S.)
| | - Chin-Chuan Chang
- Department of Nuclear Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan;
- School of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Neuroscience Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Electrical Engineering, I-Shou University, Kaohsiung 840, Taiwan
| | - Hung-Pin Chan
- Department of Nuclear Medicine, Kaohsiung Veterans General Hospital, Kaohsiung 813, Taiwan;
| | - Tze-Wen Chung
- Biomedical Engineering Research and Development Center, National Yang Ming Chiao Tung University, Taipei 112, Taiwan;
| | - Chih-Wen Shu
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-C.H.); (C.-W.S.)
| | - Kuo-Pin Chuang
- Graduate Institute of Animal Vaccine Technology, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 912, Taiwan;
| | - Tsai-Hui Duh
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Ming-Hui Yang
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung 813, Taiwan
- Center of General Education, Shu-Zen Junior College of Medicine and Management, Kaohsiung 821, Taiwan
| | - Yu-Chang Tyan
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-C.H.); (C.-W.S.)
- Department of Nuclear Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan;
- School of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Graduate Institute of Animal Vaccine Technology, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 912, Taiwan;
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
- Center for Cancer Research, Kaohsiung Medical University, Kaohsiung 807, Taiwan
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Adochițe CȘ, Vițelaru C, Parau AC, Kiss AE, Pană I, Vlădescu A, Costinaș S, Moga M, Muntean R, Badea M, Idomir M. Synthesis and Investigation of Antibacterial Activity of Thin Films Based on TiO 2-Ag and SiO 2-Ag with Potential Applications in Medical Environment. Nanomaterials (Basel) 2022; 12:902. [PMID: 35335715 PMCID: PMC8955416 DOI: 10.3390/nano12060902] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/02/2022] [Accepted: 03/05/2022] [Indexed: 12/14/2022]
Abstract
Multiple antibiotic resistance has now become a major obstacle to the treatment of infectious diseases. In this context, the application of nanotechnology in medicine is a promising alternative for the prevention of infections with multidrug-resistant germs. The use of silver as a powerful antibacterial agent has attracted much interest. TiO2 and SiO2 thin films enhanced with Ag particles have been developed with the aim of maintaining the transparency of the polymer films. Antibacterial activity was evaluated for a Gram-negative species-Escherichia coli-in concentrations of 105 and 104 CFU/mL in different conditions-activation by UV irradiation, single layer and double layer. Increased antibacterial efficacy of TiO2-deposited foil was found for the tests that had been exposed to UV activation. In the case of bilayer tests, the efficiency was higher compared to those in a single layer, as the contact surface between the films and the bacterial suspension increased. Films can be used as a potential method to limit bacterial growth on hospital surfaces, such as telephone screens and medical equipment, given their optimized characteristics and proven antibacterial efficacy.
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Affiliation(s)
- Cristina-Ș. Adochițe
- Faculty of Medicine, Transilvania University of Brasov, B-dul Eroilor nr 29, 500036 Brasov, Romania; (C.-Ș.A.); (S.C.); (M.M.); (M.I.)
| | - Cătălin Vițelaru
- National Institute of Research and Development for Optoelectronics-INOE 2000, 077125 Magurele, Romania; (A.C.P.); (A.E.K.); (I.P.); (A.V.)
| | - Anca C. Parau
- National Institute of Research and Development for Optoelectronics-INOE 2000, 077125 Magurele, Romania; (A.C.P.); (A.E.K.); (I.P.); (A.V.)
| | - Adrian E. Kiss
- National Institute of Research and Development for Optoelectronics-INOE 2000, 077125 Magurele, Romania; (A.C.P.); (A.E.K.); (I.P.); (A.V.)
| | - Iulian Pană
- National Institute of Research and Development for Optoelectronics-INOE 2000, 077125 Magurele, Romania; (A.C.P.); (A.E.K.); (I.P.); (A.V.)
| | - Alina Vlădescu
- National Institute of Research and Development for Optoelectronics-INOE 2000, 077125 Magurele, Romania; (A.C.P.); (A.E.K.); (I.P.); (A.V.)
- Physical Materials Science and Composite Materials Centre, Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Lenin Avenue 43, 634050 Tomsk, Russia
| | - Sarah Costinaș
- Faculty of Medicine, Transilvania University of Brasov, B-dul Eroilor nr 29, 500036 Brasov, Romania; (C.-Ș.A.); (S.C.); (M.M.); (M.I.)
| | - Marius Moga
- Faculty of Medicine, Transilvania University of Brasov, B-dul Eroilor nr 29, 500036 Brasov, Romania; (C.-Ș.A.); (S.C.); (M.M.); (M.I.)
| | - Radu Muntean
- Faculty of Civil Engineering, Transilvania University of Brasov, B-dul Eroilor nr 29, 500036 Brasov, Romania;
| | - Mihaela Badea
- Faculty of Medicine, Transilvania University of Brasov, B-dul Eroilor nr 29, 500036 Brasov, Romania; (C.-Ș.A.); (S.C.); (M.M.); (M.I.)
| | - Mihaela Idomir
- Faculty of Medicine, Transilvania University of Brasov, B-dul Eroilor nr 29, 500036 Brasov, Romania; (C.-Ș.A.); (S.C.); (M.M.); (M.I.)
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Aizamddin MF, Mahat MM, Ariffin ZZ, Samsudin I, Razali MSM, Amir M‘A. Synthesis, Characterisation and Antibacterial Properties of Silicone-Silver Thin Film for the Potential of Medical Device Applications. Polymers (Basel) 2021; 13:polym13213822. [PMID: 34771378 PMCID: PMC8588057 DOI: 10.3390/polym13213822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/29/2021] [Accepted: 10/30/2021] [Indexed: 12/14/2022] Open
Abstract
Silver (Ag) particles have sparked considerable interest in industry and academia, particularly for health and medical applications. Here, we present the “green” and simple synthesis of an Ag particle-based silicone (Si) thin film for medical device applications. Drop-casting and peel-off techniques were used to create an Si thin film containing 10–50% (v/v) of Ag particles. Electro impedance spectroscopy (EIS), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and tensile tests were used to demonstrate the electrical conductivity, crystallinity, morphology-elemental, and mechanical properties, respectively. The oriented crystalline structure and excellent electronic migration explained the highest conductivity value (1.40 × 10−5 S cm−1) of the 50% Ag–Si thin film. The findings regarding the evolution of the conductive network were supported by the diameter and distribution of Ag particles in the Si film. However, the larger size of the Ag particles in the Si film resulted in a lower tensile stress of 68.23% and an elongation rate of 68.25% compared to the pristine Si film. The antibacterial activity of the Ag–Si film against methicillin-resistant Staphylococcus aureus (MRSA), Bacillus cereus (B. cereus), Klebsiella pneumoniae (K. pneumoniae), and Pseudomonas aeruginosa (P. aeruginosa) was investigated. These findings support Si–Ag thin films’ ability to avoid infection in any medical device application.
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Affiliation(s)
- Muhammad Faiz Aizamddin
- School of Physics and Material Studies, Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam 40450, Malaysia;
| | - Mohd Muzamir Mahat
- School of Physics and Material Studies, Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam 40450, Malaysia;
- Correspondence: (M.M.M.); (M.A.A.)
| | - Zaidah Zainal Ariffin
- School of Biology, Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam 40450, Malaysia;
| | - Irwan Samsudin
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Sungai Buloh 47000, Malaysia; (I.S.); (M.S.M.R.)
| | - Muhammad Syafiek Mohd Razali
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Sungai Buloh 47000, Malaysia; (I.S.); (M.S.M.R.)
| | - Muhammad ‘Abid Amir
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Sungai Buloh 47000, Malaysia; (I.S.); (M.S.M.R.)
- Correspondence: (M.M.M.); (M.A.A.)
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Stefaniak K, Masek A. Green Copolymers Based on Poly(Lactic Acid)-Short Review. Materials (Basel) 2021; 14:5254. [PMID: 34576477 DOI: 10.3390/ma14185254] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/04/2021] [Accepted: 09/09/2021] [Indexed: 12/18/2022]
Abstract
Polylactic acid (PLA) is a biodegradable and biocompatible polymer that can be applied in the field of packaging and medicine. Its starting substrate is lactic acid and, on this account, PLA can also be considered an ecological material produced from renewable resources. Apart from several advantages, polylactic acid has drawbacks such as brittleness and relatively high glass transition and melting temperatures. However, copolymerization of PLA with other polymers improves PLA features, and a desirable material marked by preferable physical properties can be obtained. Presenting a detailed overview of the accounts on the PLA copolymerization accomplishments is the innovation of this paper. Scientific findings, examples of copolymers (including branched, star, grafted or block macromolecules), and its applications are discussed. As PLA copolymers can be potentially used in pharmaceutical and biomedical areas, the attention of this article is also placed on the advances present in this field of study. Moreover, the subject of PLA synthesis is described. Three methods are given: azeotropic dehydrative condensation, direct poly-condensation, and ring-opening polymerization (ROP), along with its mechanisms. The applied catalyst also has an impact on the end product and should be adequately selected depending on the intended use of the synthesized PLA. Different ways of using stannous octoate (Sn(Oct)2) and examples of the other inorganic and organic catalysts used in PLA synthesis are presented.
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Zhang Y, Gao X, Wu Y, Gui J, Guo S, Zheng H, Wang ZL. Self-powered technology based on nanogenerators for bio medical applications. Exploration (Beijing) 2021; 1:90-114. [PMID: 37366464 PMCID: PMC10291576 DOI: 10.1002/exp.20210152] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 07/09/2021] [Indexed: 06/28/2023]
Abstract
Biomedical electronic devices have enormous benefits for healthcare and quality of life. Still, the long-term working of those devices remains a great challenge due to the short life and large volume of conventional batteries. Since the nanogenerators (NGs) invention, they have been widely used to convert various ambient mechanical energy sources into electrical energy. The self-powered technology based on NGs is dedicated to harvesting ambient energy to supply electronic devices, which is an effective pathway to conquer the energy insufficiency of biomedical electronic devices. With the aid of this technology, it is expected to develop self-powered biomedical electronic devices with advanced features and distinctive functions. The goal of this review is to summarize the existing self-powered technologies based on NGs and then review the applications based on self-powered technologies in the biomedical field during their rapid development in recent years, including two main directions. The first is the NGs as independent sensors to converts biomechanical energy and heat energy into electrical signals to reflect health information. The second direction is to use the electrical energy produced by NGs to stimulate biological tissues or powering biomedical devices for achieving the purpose of medical application. Eventually, we have analyzed and discussed the remaining challenges and perspectives of the field. We believe that the self-powered technology based on NGs would advance the development of modern biomedical electronic devices.
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Affiliation(s)
- Yuanzheng Zhang
- Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of EducationSchool of Physics and TechnologyWuhan UniversityWuhanP. R. China
- International Joint Research Laboratory of New Energy Materials and Devices of Henan ProvinceHenan UniversityKaifengP. R. China
| | - Xiangyang Gao
- Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of EducationSchool of Physics and TechnologyWuhan UniversityWuhanP. R. China
| | - Yonghui Wu
- International Joint Research Laboratory of New Energy Materials and Devices of Henan ProvinceHenan UniversityKaifengP. R. China
| | - Jinzheng Gui
- Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of EducationSchool of Physics and TechnologyWuhan UniversityWuhanP. R. China
| | - Shishang Guo
- Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of EducationSchool of Physics and TechnologyWuhan UniversityWuhanP. R. China
| | - Haiwu Zheng
- International Joint Research Laboratory of New Energy Materials and Devices of Henan ProvinceHenan UniversityKaifengP. R. China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingP. R. China
- School of Materials Science and EngineeringGeorgia Institute of TechnologyAtlantaGeorgiaUSA
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Zhang X, Villafuerte J, Consonni V, Capsal JF, Cottinet PJ, Petit L, Le MQ. Characterizing and Optimizing Piezoelectric Response of ZnO Nanowire/PMMA Composite-Based Sensor. Nanomaterials (Basel) 2021; 11:1712. [PMID: 34209678 DOI: 10.3390/nano11071712] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/16/2021] [Accepted: 06/25/2021] [Indexed: 11/27/2022]
Abstract
Due to the outstanding coupling between piezoelectric and semiconducting properties of zinc oxide nanowires, ZnO NW-based structures have been demonstrating promising potential with respect to their applicability in piezoelectric, piezotronic and piezo-phototronic devices. Particularly considering their biocompatibility and biosafety for applications regarding implantable medical detection, this paper proposed a new concept of piezoelectric composite, i.e., one consisting of vertically aligned ZnO NW arrays and an insulating polymer matrix. First, the finite element method (FEM) was employed to drive optimization strategies through adjustment of the key parameters such as Young’s modules and the dielectric constant of the dielectric constituents, together with the density and dimension of nanowire (NW) itself. Second, to investigate the functionality of each individual layer of composite, different designed structures were fabricated and characterized in terms of electrical and piezoelectric properties. Next, experimental and simulation tests were performed, indicating that the decreasing thickness of the top poly(methyl methacrylate) layer (PMMA) can substantially enhance the piezoelectric sensitivity of the ZnO NW composite. Besides the further benefit of no polarization being needed, our material has a comparable charge coefficient (d33) with respect to other lead-free alternatives (e.g., BaTiO3), confirming the high sensing abilities of the developed structure based on vertically aligned ZnO NW arrays. Finally, a time-varying model combining piezoelectricity and electric circuit modules was investigated in detail, giving rise to an estimation of the d33 coefficient for ZnO NWs. Based on this study, the developed material is revealed to be highly promising in medical applications, particularly regarding the FFR technique, where coronary pressure can be measured through a piezoelectric sensor.
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Hirano SI, Ichikawa Y, Sato B, Yamamoto H, Takefuji Y, Satoh F. Molecular Hydrogen as a Potential Clinically Applicable Radioprotective Agent. Int J Mol Sci 2021; 22:4566. [PMID: 33925430 DOI: 10.3390/ijms22094566] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/15/2021] [Accepted: 04/22/2021] [Indexed: 02/07/2023] Open
Abstract
Although ionizing radiation (radiation) is commonly used for medical diagnosis and cancer treatment, radiation-induced damages cannot be avoided. Such damages can be classified into direct and indirect damages, caused by the direct absorption of radiation energy into DNA and by free radicals, such as hydroxyl radicals (•OH), generated in the process of water radiolysis. More specifically, radiation damage concerns not only direct damages to DNA, but also secondary damages to non-DNA targets, because low-dose radiation damage is mainly caused by these indirect effects. Molecular hydrogen (H2) has the potential to be a radioprotective agent because it can selectively scavenge •OH, a reactive oxygen species with strong oxidizing power. Animal experiments and clinical trials have reported that H2 exhibits a highly safe radioprotective effect. This paper reviews previously reported radioprotective effects of H2 and discusses the mechanisms of H2, not only as an antioxidant, but also in intracellular responses including anti-inflammation, anti-apoptosis, and the regulation of gene expression. In doing so, we demonstrate the prospects of H2 as a novel and clinically applicable radioprotective agent.
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Sharifi-Rad M, Pohl P, Epifano F. Phytofabrication of Silver Nanoparticles (AgNPs) with Pharmaceutical Capabilities Using Otostegia persica (Burm.) Boiss. Leaf Extract. Nanomaterials (Basel) 2021; 11:1045. [PMID: 33921810 DOI: 10.3390/nano11041045] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/16/2021] [Accepted: 04/16/2021] [Indexed: 12/20/2022]
Abstract
In the last years, the plant-mediated synthesis of nanoparticles has been extensively researched as an affordable and eco-friendly method. The current study confirms for the first time the capability of the Otostegia persica (Burm.) Boiss. leaf extract for the synthesis of silver nanoparticles (AgNPs). The phytofabricated AgNPs were characterized by ultraviolet–visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), and zeta potential analysis. Moreover, the total phenolic and flavonoids contents, and the antioxidant, antibacterial, antifungal, and anti-inflammatory properties of the phytofabricated AgNPs and the O. persica leaf extract were assessed. The results showed that the produced AgNPs were crystalline in nature and spherical in shape with an average size of 36.5 ± 2.0 nm, and indicated a localized surface plasmon resonance (LSPR) peak at around 420 nm. The zeta potential value of −25.2 mV pointed that the AgNPs were stable. The phytofabricated AgNPs had lower total phenolic and flavonoids contents than those for the O. persica leaf extract. The abovementioned AgNPs showed a higher antioxidant activity as compared with the O. persica leaf extract. They also exhibited significant antibacterial activity against both Gram-positive (Staphylococcus aureus, Bacillus subtilis, and Streptococcus pyogenes) and Gram-negative (Escherichia coli, Pseudomonas aeruginosa, and Salmonella typhi) bacteria. In addition, appropriate antifungal effects with the minimum inhibitory concentration (MIC) values of 18.75, 37.5, and 75 µg mL−1 against Candida krusei, Candida glabrata, and Candida albicans, respectively, were noted for this new bionanomaterial. Finally, the phytofabricated AgNPs showed dose-dependent anti-inflammatory activity in the human red blood cell (RBC) membrane stabilization test, being higher than that for the O. persica leaf extract. The resulting phytofabricated AgNPs could be used as a promising antioxidant, antibacterial, antifungal, and anti-inflammatory agent in the treatments of many medical complications.
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Kitagaki H. Medical Application of Substances Derived from Non-Pathogenic Fungi Aspergillus oryzae and A. luchuensis-Containing Koji. J Fungi (Basel) 2021; 7:243. [PMID: 33804991 DOI: 10.3390/jof7040243] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/17/2021] [Accepted: 03/19/2021] [Indexed: 02/07/2023] Open
Abstract
Although most fungi cause pathogenicity toward human beings, dynasties of the East Asian region have domesticated and utilized specific fungi for medical applications. The Japanese dynasty and nation have domesticated and utilized koji fermented with non-pathogenic fungus Aspergillus oryzae for more than 1300 years. Recent research has elucidated that koji contains medicinal substances such as Taka-diastase, acid protease, koji glycosylceramide, kojic acid, oligosaccharides, ethyl-α-d-glucoside, ferulic acid, ergothioneine, pyroglutamyl leucine, pyranonigrin A, resistant proteins, deferriferrichrysin, polyamines, Bifidobacterium-stimulating peptides, angiotensin I-converting enzyme inhibitor peptides, 14-dehydroergosterol, beta-glucan, biotin, and citric acid. This review introduces potential medical applications of such medicinal substances to hyperlipidemia, diabetes, hypertension, cardiovascular and cognitive diseases, chronic inflammation, epidermal permeability barrier disruption, coronavirus disease 2019 (COVID-19), and anti-cancer therapy.
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Hirano SI, Ichikawa Y, Sato B, Yamamoto H, Takefuji Y, Satoh F. Potential Therapeutic Applications of Hydrogen in Chronic Inflammatory Diseases: Possible Inhibiting Role on Mitochondrial Stress. Int J Mol Sci 2021; 22:2549. [PMID: 33806292 DOI: 10.3390/ijms22052549] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/26/2021] [Accepted: 03/01/2021] [Indexed: 01/10/2023] Open
Abstract
Mitochondria are the largest source of reactive oxygen species (ROS) and are intracellular organelles that produce large amounts of the most potent hydroxyl radical (·OH). Molecular hydrogen (H2) can selectively eliminate ·OH generated inside of the mitochondria. Inflammation is induced by the release of proinflammatory cytokines produced by macrophages and neutrophils. However, an uncontrolled or exaggerated response often occurs, resulting in severe inflammation that can lead to acute or chronic inflammatory diseases. Recent studies have reported that ROS activate NLRP3 inflammasomes, and that this stimulation triggers the production of proinflammatory cytokines. It has been shown in literature that H2 can be based on the mechanisms that inhibit mitochondrial ROS. However, the ability for H2 to inhibit NLRP3 inflammasome activation via mitochondrial oxidation is poorly understood. In this review, we hypothesize a possible mechanism by which H2 inhibits mitochondrial oxidation. Medical applications of H2 may solve the problem of many chronic inflammation-based diseases, including coronavirus disease 2019 (COVID-19).
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Abstract
Lasso peptides are natural products found in bacteria. They belong to a specific family of ribosomally-synthesized and posttranslationally-modified peptides with an unusual lasso structure. Lasso peptides possess remarkable thermal and proteolytic stability and various biological activities, such as antimicrobial activity, enzyme inhibition, receptor blocking, anticancer properties and HIV antagonism. They have promising potential therapeutic effects on gastrointestinal diseases, tuberculosis, Alzheimer’s disease, cardiovascular disease, fungal infections and cancer. Lasso peptides with high stability have been shown to be good carriers for other bioactive peptides. These make them attractive candidates for pharmaceutical research. This review aimed to describe the strategies used for the heterologous production of lasso peptides. Also, it indicated their therapeutical potential and their capacity to use as an efficient scaffold for epitope grafting.
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Affiliation(s)
- Cheng Cheng
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Zi-Chun Hua
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China.,School of Biopharmacy, China Pharmaceutical University, Nanjing, China.,Changzhou High-Tech Research Institute of Nanjing University, Changzhou, China.,Jiangsu Target Pharma Laboratories Inc., Changzhou, China
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吴 玉, 林 岚, 王 婧, 吴 水. [Application of semantic segmentation based on convolutional neural network in medical images]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2020; 37:533-540. [PMID: 32597097 PMCID: PMC10319567 DOI: 10.7507/1001-5515.201906067] [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] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Indexed: 11/03/2022]
Abstract
With the rapid development of network structure, convolutional neural networks (CNN) consolidated its position as a leading machine learning tool in the field of image analysis. Therefore, semantic segmentation based on CNN has also become a key high-level task in medical image understanding. This paper reviews the research progress on CNN-based semantic segmentation in the field of medical image. A variety of classical semantic segmentation methods are reviewed, whose contributions and significance are highlighted. On this basis, their applications in the segmentation of some major physiological and pathological anatomical structures are further summarized and discussed. Finally, the open challenges and potential development direction of semantic segmentation based on CNN in the area of medical image are discussed.
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Affiliation(s)
- 玉超 吴
- 北京工业大学 生命科学与生物工程学院(北京 100124)College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, P.R.China
| | - 岚 林
- 北京工业大学 生命科学与生物工程学院(北京 100124)College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, P.R.China
| | - 婧璇 王
- 北京工业大学 生命科学与生物工程学院(北京 100124)College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, P.R.China
| | - 水才 吴
- 北京工业大学 生命科学与生物工程学院(北京 100124)College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, P.R.China
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AlMatar M, Albarri O, Makky EA, Var I, Köksal F. A Glance on the Role of Bacterial Siderophore from the Perspectives of Medical and Biotechnological Approaches. Curr Drug Targets 2020; 21:1326-1343. [PMID: 32564749 DOI: 10.2174/1389450121666200621193018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/10/2020] [Accepted: 05/20/2020] [Indexed: 11/22/2022]
Abstract
Iron, which is described as the most basic component found in nature, is hard to be assimilated by microorganisms. It has become increasingly complicated to obtain iron from nature as iron (II) in the presence of oxygen oxidized to press (III) oxide and hydroxide, becoming unsolvable at neutral pH. Microorganisms appeared to produce organic molecules known as siderophores in order to overcome this condition. Siderophore's essential function is to connect with iron (II) and make it dissolvable and enable cell absorption. These siderophores, apart from iron particles, have the ability to chelate various other metal particles that have collocated away to focus the use of siderophores on wound care items. There is a severe clash between the host and the bacterial pathogens during infection. By producing siderophores, small ferric iron-binding molecules, microorganisms obtain iron. In response, host immune cells produce lipocalin 2 to prevent bacterial reuptake of siderophores loaded with iron. Some bacteria are thought to produce lipocalin 2-resistant siderophores to counter this risk. The aim of this article is to discuss the recently described roles and applications of bacterial siderophore.
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Affiliation(s)
- Manaf AlMatar
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang (UMP), Gambang, 26300 Kuantan, Malaysia
| | - Osman Albarri
- Department of Biotechnology, Institute of Natural and Applied Sciences (Fen Bilimleri Enstitusu) Cukurova University, Adana, Turkey
| | - Essam A Makky
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang (UMP), Gambang, 26300 Kuantan, Malaysia
| | - Işıl Var
- Department of Food Engineering, Agricultural Faculty, Cukurova University, Adana, Turkey
| | - Fatih Köksal
- Department of Medical Microbiology, Faculty of Medicine, Cukurova University, Adana, Turkey
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Zeng C, Liao Q, Hu Y, Shen Y, Geng F, Chen L. The Role of Periplaneta americana (Blattodea: Blattidae) in Modern Versus Traditional Chinese Medicine. J Med Entomol 2020; 56:1522-1526. [PMID: 31265723 DOI: 10.1093/jme/tjz081] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Indexed: 02/05/2023]
Abstract
The purpose of this review is to elaborate the role of Periplaneta (P.) americana L. in modern and traditional Chinese medicine (TCM) and compare the use of the species in these two forms of medical treatments. From searches on Google Scholar, PubMed, and Web of Science databases, studies were identified involving TCMs with P. americana, which have a history of use over several thousand years, and demonstrate how extracts from this insect play a role in the treatment of diseases through antibacterial, antiviral, antitumor activity, and enhancement of immune function. Extracts from P. americana have not been fully developed for clinical use because the active components have not been completely purified or their molecular mechanisms thoroughly understood. The development of extraction technology in modern Chinese medicine has revealed that many extracts from P. americana are able to play an important role in the control of diseases such as cancer. Drugs such as 'Kangfuxin Solution' and 'Xinmailong Injection' are now widely used for gastrointestinal ulcers and chronic heart failure, having achieved beneficial curative effects in clinical studies. Based on this, the information from studies of P. americana in TCM and modern medicine should be combined and their respective advantages applied. This review provides an overview of the role of P. americana in modern and TCM and thus contributes to identification of further applications and area requiring drug development.
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Affiliation(s)
- Chenjuan Zeng
- Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Qi Liao
- Gooddoctor Pharmaceutical Group, Chengdu, Sichuan, P.R. China
| | - Ye Hu
- Gooddoctor Pharmaceutical Group, Chengdu, Sichuan, P.R. China
| | - Yongmei Shen
- Gooddoctor Pharmaceutical Group, Chengdu, Sichuan, P.R. China
| | - Funeng Geng
- Gooddoctor Pharmaceutical Group, Chengdu, Sichuan, P.R. China
| | - Lijuan Chen
- Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, P.R. China
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Nakamura S, Ando N, Sato M, Ishihara M. Ultraviolet Irradiation Enhances the Microbicidal Activity of Silver Nanoparticles by Hydroxyl Radicals. Int J Mol Sci 2020; 21:E3204. [PMID: 32366059 DOI: 10.3390/ijms21093204] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/29/2020] [Accepted: 04/29/2020] [Indexed: 12/02/2022] Open
Abstract
It is known that silver has microbicidal qualities; even at a low concentration, silver is active against many kinds of bacteria. Silver nanoparticles (AgNPs) have been extensively studied for a wide range of applications. Alternately, the toxicity of silver to human cells is considerably lower than that to bacteria. Recent studies have shown that AgNPs also have antiviral activity. We found that large amounts of hydroxyl radicals—highly reactive molecular species—are generated when AgNPs are irradiated with ultraviolet (UV) radiation with a wavelength of 365 nm, classified as ultraviolet A (UVA). In this study, we used electron spin resonance direct detection to confirm that UV irradiation of AgNPs produced rapid generation of hydroxyl radicals. As hydroxyl radicals are known to degrade bacteria, viruses, and some chemicals, the enhancement of the microbicidal activity of AgNPs by UV radiation could be valuable for the protection of healthcare workers and the prevention of the spread of infectious diseases.
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Narancic T, Cerrone F, Beagan N, O’Connor KE. Recent Advances in Bioplastics: Application and Biodegradation. Polymers (Basel) 2020; 12:E920. [PMID: 32326661 PMCID: PMC7240402 DOI: 10.3390/polym12040920] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/07/2020] [Accepted: 04/13/2020] [Indexed: 12/12/2022] Open
Abstract
The success of oil-based plastics and the continued growth of production and utilisation can be attributed to their cost, durability, strength to weight ratio, and eight contributions to the ease of everyday life. However, their mainly single use, durability and recalcitrant nature have led to a substantial increase of plastics as a fraction of municipal solid waste. The need to substitute single use products that are not easy to collect has inspired a lot of research towards finding sustainable replacements for oil-based plastics. In addition, specific physicochemical, biological, and degradation properties of biodegradable polymers have made them attractive materials for biomedical applications. This review summarises the advances in drug delivery systems, specifically design of nanoparticles based on the biodegradable polymers. We also discuss the research performed in the area of biophotonics and challenges and opportunities brought by the design and application of biodegradable polymers in tissue engineering. We then discuss state-of-the-art research in the design and application of biodegradable polymers in packaging and emphasise the advances in smart packaging development. Finally, we provide an overview of the biodegradation of these polymers and composites in managed and unmanaged environments.
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Affiliation(s)
- Tanja Narancic
- UCD Earth Institute and School of Biomolecular and Biomedical Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland; (T.N.); (F.C.); (N.B.)
- BiOrbic - Bioeconomy Research Centre, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland
| | - Federico Cerrone
- UCD Earth Institute and School of Biomolecular and Biomedical Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland; (T.N.); (F.C.); (N.B.)
- BiOrbic - Bioeconomy Research Centre, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland
| | - Niall Beagan
- UCD Earth Institute and School of Biomolecular and Biomedical Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland; (T.N.); (F.C.); (N.B.)
| | - Kevin E. O’Connor
- UCD Earth Institute and School of Biomolecular and Biomedical Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland; (T.N.); (F.C.); (N.B.)
- BiOrbic - Bioeconomy Research Centre, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland
- School of Biomolecular and Biomedical Sciences, Earth Institute, O’Brien Centre for Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland
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Naghmouchi K, Belguesmia Y, Bendali F, Spano G, Seal BS, Drider D. Lactobacillus fermentum: a bacterial species with potential for food preservation and bio medical applications. Crit Rev Food Sci Nutr 2019; 60:3387-3399. [PMID: 31729242 DOI: 10.1080/10408398.2019.1688250] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Lactic acid-producing bacteria are the most commonly used probiotics that play an important role in protecting the host against harmful microorganisms, strengthening the host immune system, improving feed digestibility, and reducing metabolic disorders. Lactobacillus fermentum (Lb. fermentum) is a Gram-positive bacterium belonging to Lactobacillus genus, and many reportedly to enhance the immunologic response as well as prevent community-acquired gastrointestinal and upper respiratory infections. Additionally, Lb. fermentum strains produce diverse and potent antimicrobial peptides, which can be applied as food preservative agents or as alternatives to antibiotics. Further functions attributed to probiotic Lb. fermentum strains are their abilities to decrease the level of blood stream cholesterol (as cholesterol-lowering agents) and to potentially help prevent alcoholic liver disease and colorectal cancer among humans. Finally, Lb. fermentum is a key microorganism in sourdough technology, contributing to flavor, texture, or health-promoting dough ingredients, and has recently been used to develop new foods stuffs such as fortified and functional foods with beneficial attributes for human health. Development of such new foodstuffs are currently taking important proportions of the food industry market. Furthermore, an increasing awareness of the consumers prompts the food-makers to implement alternative environmental friendly solutions in the production processes and/or suitable biological alternative to limit the use of antibiotics in feed and food. Here, we give an account on the application of Lb. fermentum strains in the biomedical and food preservation fields, with a focus on probiotic features such as bacteriocin production. We also summarize the use of Lb. fermentum as cell factories with the aim to improve the efficacy and health value of functional food.
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Affiliation(s)
- Karim Naghmouchi
- Department of Pharmaceutical Chemistry, College of Clinical Pharmacy, Al Baha University, Saudi Arabia.,Faculté des Sciences de Tunis, Université de Tunis El Manar, LR01ES05 Biochimie et Biotechnologie, Tunis, Tunisie
| | - Yanath Belguesmia
- Université Lille, INRA, ISA, Université d'Artois, Université Littoral Côte d'Opale, EA 7394-ICV Institut Charles Viollette, Lille, France
| | - Farida Bendali
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Bejaia, Algeria
| | - Giuseppe Spano
- Dipartimento di Scienze Agrarie, degli Alimenti e dell'Ambiente, Università di Foggia, Foggia, Italy
| | - Bruce S Seal
- Biology Program, Oregon State University Cascades, Bend, Oregon, USA
| | - Djamel Drider
- Université Lille, INRA, ISA, Université d'Artois, Université Littoral Côte d'Opale, EA 7394-ICV Institut Charles Viollette, Lille, France
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Nakamura S, Sato M, Sato Y, Ando N, Takayama T, Fujita M, Ishihara M. Synthesis and Application of Silver Nanoparticles (Ag NPs) for the Prevention of Infection in Healthcare Workers. Int J Mol Sci 2019; 20:E3620. [PMID: 31344881 PMCID: PMC6695748 DOI: 10.3390/ijms20153620] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [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: 06/26/2019] [Revised: 07/19/2019] [Accepted: 07/23/2019] [Indexed: 12/21/2022] Open
Abstract
Silver is easily available and is known to have microbicidal effect; moreover, it does not impose any adverse effects on the human body. The microbicidal effect is mainly due to silver ions, which have a wide antibacterial spectrum. Furthermore, the development of multidrug-resistant bacteria, as in the case of antibiotics, is less likely. Silver ions bind to halide ions, such as chloride, and precipitate; therefore, when used directly, their microbicidal activity is shortened. To overcome this issue, silver nanoparticles (Ag NPs) have been recently synthesized and frequently used as microbicidal agents that release silver ions from particle surface. Depending on the specific surface area of the nanoparticles, silver ions are released with high efficiency. In addition to their bactericidal activity, small Ag NPs (<10 nm in diameter) affect viruses although the microbicidal effect of silver mass is weak. Because of their characteristics, Ag NPs are useful countermeasures against infectious diseases, which constitute a major issue in the medical field. Thus, medical tools coated with Ag NPs are being developed. This review outlines the synthesis and utilization of Ag NPs in the medical field, focusing on environment-friendly synthesis and the suppression of infections in healthcare workers (HCWs).
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Affiliation(s)
- Shingo Nakamura
- Division of Biomedical Engineering, National Defense Medical College Research Institute, Saitama 359-8513, Japan.
| | - Masahiro Sato
- Section of Gene Expression Regulation, Frontier Science Research Center, Kagoshima University, Kagoshima 890-8544, Japan
| | - Yoko Sato
- Division of Biomedical Engineering, National Defense Medical College Research Institute, Saitama 359-8513, Japan
| | - Naoko Ando
- Division of Biomedical Engineering, National Defense Medical College Research Institute, Saitama 359-8513, Japan
| | - Tomohiro Takayama
- Department of Oral and Maxillofacial Surgery, National Defense Medical College Hospital, Saitama 359-8513, Japan
| | - Masanori Fujita
- Division of Environmental Medicine, National Defense Medical College Research Institute, Saitama 359-8513, Japan
| | - Masayuki Ishihara
- Division of Biomedical Engineering, National Defense Medical College Research Institute, Saitama 359-8513, Japan
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Quan WY, Hu Z, Liu HZ, Ouyang QQ, Zhang DY, Li SD, Li PW, Yang ZM. Mussel-Inspired Catechol-Functionalized Hydrogels and Their Medical Applications. Molecules 2019; 24:E2586. [PMID: 31315269 PMCID: PMC6680511 DOI: 10.3390/molecules24142586] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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: 05/11/2019] [Revised: 07/13/2019] [Accepted: 07/13/2019] [Indexed: 12/19/2022] Open
Abstract
Mussel adhesive proteins (MAPs) have a unique ability to firmly adhere to different surfaces in aqueous environments via the special amino acid, 3,4-dihydroxyphenylalanine (DOPA). The catechol groups in DOPA are a key group for adhesive proteins, which is highly informative for the biomedical domain. By simulating MAPs, medical products can be developed for tissue adhesion, drug delivery, and wound healing. Hydrogel is a common formulation that is highly adaptable to numerous medical applications. Based on a discussion of the adhesion mechanism of MAPs, this paper reviews the formation and adhesion mechanism of catechol-functionalized hydrogels, types of hydrogels and main factors affecting adhesion, and medical applications of hydrogels, and future the development of catechol-functionalized hydrogels.
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Affiliation(s)
- Wei-Yan Quan
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China
| | - Zhang Hu
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China.
| | - Hua-Zhong Liu
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China
| | - Qian-Qian Ouyang
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China
| | - Dong-Ying Zhang
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China
| | - Si-Dong Li
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China
| | - Pu-Wang Li
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Product Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524001, Guangdong, China.
| | - Zi-Ming Yang
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Product Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524001, Guangdong, China
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Urbánek T, Jäger E, Jäger A, Hrubý M. Selectively Biodegradable Polyesters: Nature-Inspired Construction Materials for Future Bio medical Applications. Polymers (Basel) 2019; 11:E1061. [PMID: 31248100 PMCID: PMC6630685 DOI: 10.3390/polym11061061] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/28/2019] [Accepted: 06/14/2019] [Indexed: 12/13/2022] Open
Abstract
In the last half-century, the development of biodegradable polyesters for biomedical applications has advanced significantly. Biodegradable polyester materials containing external stimuli-sensitive linkages are favored in the development of therapeutic devices for pharmacological applications such as delivery vehicles for controlled/sustained drug release. These selectively biodegradable polyesters degrade after particular external stimulus (e.g., pH or redox potential change or the presence of certain enzymes). This review outlines the current development of biodegradable synthetic polyesters materials able to undergo hydrolytic or enzymatic degradation for various biomedical applications, including tissue engineering, temporary implants, wound healing and drug delivery.
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Affiliation(s)
- Tomáš Urbánek
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského náměstí 2, 162 00 Prague 6, Czech Republic.
| | - Eliézer Jäger
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského náměstí 2, 162 00 Prague 6, Czech Republic.
| | - Alessandro Jäger
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského náměstí 2, 162 00 Prague 6, Czech Republic.
| | - Martin Hrubý
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského náměstí 2, 162 00 Prague 6, Czech Republic.
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Abstract
Bacillus coagulans is a probiotic bacterium that produces spores. Due to its excellent stability, it has been widely used in medicine, food and chemical industry. Recent studies have shown that B. coagulans has therapeutic effects on intestinal diseases, such as acute diarrhoea, irritable bowel syndrome, antibiotic-related diarrhoea, constipation and colitis via modulation of the microbiota composition, host immunity and metabolism. Additionally, toxicological experiments and a large number of clinical observations have showed that B. coagulans is safe and has no effect of mutagenicity, teratogenicity or genotoxicity. This review summarises the latest advances associated with B. coagulans, from its biological features, probable action mechanisms, toxicity, and medical applications.
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Affiliation(s)
- Y Mu
- 1 Gastroenterology department, Liaohe Oilfield Central Hospital, Panjin, Liaoning 124010, China P.R
| | - Y Cong
- 2 Department of Clinical Laboratory, Traditional Chinese Medicine Hospital Affiliated to Southwest Medical University, Luzhou, Sichuan 646000, China P.R
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Esfahani S, Wicaksono A, Mozdiak E, Arasaradnam RP, Covington JA. Non-Invasive Diagnosis of Diabetes by Volatile Organic Compounds in Urine Using FAIMS and Fox4000 Electronic Nose. Biosensors (Basel) 2018; 8:E121. [PMID: 30513787 DOI: 10.3390/bios8040121] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/07/2018] [Accepted: 11/19/2018] [Indexed: 11/30/2022]
Abstract
The electronic nose (eNose) is an instrument designed to mimic the human olfactory system. Usage of eNose in medical applications is more popular than ever, due to its low costs and non-invasive nature. The eNose sniffs the gases and vapours that emanate from human waste (urine, breath, and stool) for the diagnosis of variety of diseases. Diabetes mellitus type 2 (DM2) affects 8.3% of adults in the world, with 43% being underdiagnosed, resulting in 4.9 million deaths per year. In this study, we investigated the potential of urinary volatile organic compounds (VOCs) as novel non-invasive diagnostic biomarker for diabetes. In addition, we investigated the influence of sample age on the diagnostic accuracy of urinary VOCs. We analysed 140 urine samples (73 DM2, 67 healthy) with Field-Asymmetric Ion Mobility Spectrometry (FAIMS); a type of eNose; and FOX 4000 (AlphaM.O.S, Toulouse, France). Urine samples were collected at UHCW NHS Trust clinics over 4 years and stored at −80 °C within two hours of collection. Four different classifiers were used for classification, specifically Sparse Logistic Regression, Random Forest, Gaussian Process, and Support Vector on both FAIMS and FOX4000. Both eNoses showed their capability of diagnosing DM2 from controls and the effect of sample age on the discrimination. FAIMS samples were analysed for all samples aged 0–4 years (AUC: 88%, sensitivity: 87%, specificity: 82%) and then sub group samples aged less than a year (AUC (Area Under the Curve): 94%, Sensitivity: 92%, specificity: 100%). FOX4000 samples were analysed for all samples aged 0–4 years (AUC: 85%, sensitivity: 77%, specificity: 85%) and a sub group samples aged less than 18 months: (AUC: 94%, sensitivity: 90%, specificity: 89%). We demonstrated that FAIMS and FOX 4000 eNoses can discriminate DM2 from controls using urinary VOCs. In addition, we showed that urine sample age affects discriminative accuracy.
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Lu Y, Zhao S, Younes N, Hahn JK. Accurate nonrigid 3D human body surface reconstruction using commodity depth sensors. Comput Animat Virtual Worlds 2018; 29:e1807. [PMID: 31156352 PMCID: PMC6541015 DOI: 10.1002/cav.1807] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 02/27/2018] [Indexed: 06/09/2023]
Abstract
In the last decade, 3D modeling techniques enjoyed a booming development in both hardware and software. High-end hardware generates high fidelity results, but the cost is prohibitive, whereas consumer-level devices generate plausible results for entertainment purposes but are not appropriate for medical uses. We present a cost-effective and easy-to-use 3D body reconstruction system using consumer-grade depth sensors, which provides reconstructed body shapes with a high degree of accuracy and reliability appropriate for medical applications. Our surface registration framework integrates the articulated motion assumption, global loop closure constraint, and a general as-rigid-as-possible deformation model. To enhance the reconstruction quality, we propose a novel approach to accurately infer skeletal joints from anatomical data using multimodality registration. We further propose a supervised predictive model to infer the skeletal joints for arbitrary subjects independent from anatomical data reference. A rigorous validation test has been conducted on real subjects to evaluate the reconstruction accuracy and repeatability. Our system has the potential to make accurate body surface scanning systems readily available for medical professionals and the general public. The system can be used to obtain additional health data derived from 3D body shapes, such as the percentage of body fat.
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Affiliation(s)
- Yao Lu
- Department of Computer Science, School of Engineering and Applied Science, Institute for Computer Graphics, The George Washington University, 800 22nd Street NW Suite 3400, Washington, DC 20052, USA
| | - Shang Zhao
- Department of Computer Science, School of Engineering and Applied Science, Institute for Computer Graphics, The George Washington University, 800 22nd Street NW Suite 3400, Washington, DC 20052, USA
| | - Naji Younes
- Department of Epidemiology and Biostatistics, Milken Institute School of Public Health, The George Washington University, 800 22nd Street NW Suite 7680, Washington, DC 20052, USA
| | - James K. Hahn
- Department of Computer Science, School of Engineering and Applied Science, and Department of Pediatrics, School of Medicine and Health Sciences, Institute for Computer Graphics, The George Washington University, 800 22nd Street NW Suite 5830, Washington, DC 20052, USA
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Tenjimbayashi M, Park JY, Muto J, Kobayashi Y, Yoshikawa R, Monnai Y, Shiratori S. In Situ Formation of Slippery-Liquid-Infused Nanofibrous Surface for a Transparent Antifouling Endoscope Lens. ACS Biomater Sci Eng 2018; 4:1871-1879. [PMID: 33445342 DOI: 10.1021/acsbiomaterials.8b00134] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Slippery-liquid-infused porous surfaces (SLIPS) are state-of-the-art materials owing to their excellent properties derived from their fluidity (e.g., dynamic omniphobicity and self-healing function). Although SLIPS have been multifunctionalized and developed for various applications, the fabrication process is not well advanced because it is time-consuming and requires multiple steps. Here, a versatile method is reported for the instant formation of slippery surfaces in situ. A lubricated fiber-filled porous sheet was designed, and a coating was formed simply by sticking a surface to the sheet. This sheet can be used as a "disposable instant coating kit" and be made available for instant and repeated coating of SLIPS. The technique is applied to a transparent antifouling endoscope lens as a proof-of-concept. This work improves the fabrication process of SLIPS and contributes to the practical use of SLIPS.
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Affiliation(s)
- Mizuki Tenjimbayashi
- Center for Material Design Science, School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan
| | - Jun-Yong Park
- Center for Material Design Science, School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan
| | - Jun Muto
- Department of Neurosurgical Surgery, School of Medicine, Keio University, 35 Shinano-machi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Yuta Kobayashi
- Center for Material Design Science, School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan
| | - Ryohei Yoshikawa
- Center for Material Design Science, School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan
| | - Yasuaki Monnai
- Center for Applied Physics and Physico-Informatics, School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Seimei Shiratori
- Center for Material Design Science, School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan.,Center for Applied Physics and Physico-Informatics, School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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Zhao F, Li D, Jin Z. Preliminary Investigation of Poly-Ether-Ether-Ketone Based on Fused Deposition Modeling for Medical Applications. Materials (Basel) 2018; 11:ma11020288. [PMID: 29439551 PMCID: PMC5848985 DOI: 10.3390/ma11020288] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 02/02/2018] [Accepted: 02/08/2018] [Indexed: 11/18/2022]
Abstract
Poly-ether-ether-ketone (PEEK) fabricated by fused deposition modeling for medical applications was evaluated in terms of mechanical strength and in vitro cytotoxicity in this study. Orthogonal experiments were firstly designed to investigate the significant factors on tensile strength. Nozzle temperature, platform temperature, and the filament diameter were tightly controlled for improved mechanical strength performance. These sensitive parameters affected the interlayer bonding and solid condition in the samples. Fourier transform infrared (FTIR) spectrometry analysis was secondly conducted to compare the functional groups in PEEK granules, filaments, and printed parts. In vitro cytotoxicity test was carried out at last, and no toxic substances were introduced during the printing process.
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Affiliation(s)
- Feng Zhao
- State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China.
| | - Dichen Li
- State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China.
| | - Zhongmin Jin
- State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China.
- Institute of Medical and Biological Engineering, University of Leeds, Leeds LS2 9JT, UK.
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Lee KH, Kim SJ, Cha YH, Kim JL, Kim DK, Kim SJ. Three-dimensional printed prosthesis demonstrates functional improvement in a patient with an amputated thumb: A technical note. Prosthet Orthot Int 2018; 42:107-111. [PMID: 27913783 DOI: 10.1177/0309364616679315] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND AND AIM Three-dimensional printer is widely used in industry, biology, and medical fields. We report a finger prosthesis produced by a three-dimensional scanner and printer for a 67-year-old man with a right thumb amputation above the metacarpophalangeal joint. TECHNIQUE His right amputated and left intact hands were scanned with a three-dimensional scanner, and the left-hand image was rotated to the right side to design the right thumb prosthesis. The designed prosthesis was printed with a three-dimensional printer using the fused filament fabrication output system. DISCUSSION The Jebsen-Taylor hand function test and Box and Block Test scores improved after application of the prosthesis. Most Quebec User Evaluation of Satisfaction with Assistive Technology results were "very satisfied," and most Orthotics and Prosthetics Users' Survey results were "very easy." Preparing the prosthesis made by three-dimensional scanner and three-dimensional printer was faster and cheaper than preparing a conventional prosthesis. Clinical relevance Using three-dimensional scanning and printing technique, we can easily produce specifically shaped finger prostheses for specific movements in amputated patients with low cost.
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Affiliation(s)
- Keun Ho Lee
- 1 Department of Occupational Therapy, Samsung Medical Center, Seoul, Korea
| | - Sung Jae Kim
- 2 Department of Medical Device Management & Research, SAIHST, Sungkyunkwan University, Seoul, Korea
| | - Yong Ho Cha
- 3 Department of Physical Therapy, Samsung Medical Center, Seoul, Korea
| | - Jae Lim Kim
- 4 Department of Physical and Rehabilitation Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Dong Kyu Kim
- 4 Department of Physical and Rehabilitation Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang Jun Kim
- 4 Department of Physical and Rehabilitation Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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49
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Furmaniak MA, Misztak AE, Franczuk MD, Wilmotte A, Waleron M, Waleron KF. Edible Cyanobacterial Genus Arthrospira: Actual State of the Art in Cultivation Methods, Genetics, and Application in Medicine. Front Microbiol 2017; 8:2541. [PMID: 29326676 PMCID: PMC5741684 DOI: 10.3389/fmicb.2017.02541] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 12/06/2017] [Indexed: 11/13/2022] Open
Abstract
The cyanobacterial genus Arthrospira appears very conserved and has been divided into five main genetic clusters on the basis of molecular taxonomy markers. Genetic studies of seven Arthrospira strains, including genome sequencing, have enabled a better understanding of those photosynthetic prokaryotes. Even though genetic manipulations have not yet been performed with success, many genomic and proteomic features such as stress adaptation, nitrogen fixation, or biofuel production have been characterized. Many of above-mentioned studies aimed to optimize the cultivation conditions. Factors like the light intensity and quality, the nitrogen source, or different modes of growth (auto-, hetero-, or mixotrophic) have been studied in detail. The scaling-up of the biomass production using photobioreactors, either closed or open, was also investigated to increase the production of useful compounds. The richness of nutrients contained in the genus Arthrospira can be used for promising applications in the biomedical domain. Ingredients such as the calcium spirulan, immulina, C-phycocyanin, and γ-linolenic acid (GLA) show a strong biological activity. Recently, its use in the fight against cancer cells was documented in many publications. The health-promoting action of "Spirulina" has been demonstrated in the case of cardiovascular diseases and age-related conditions. Some compounds also have potent immunomodulatory properties, promoting the growth of beneficial gut microflora, acting as antimicrobial and antiviral. Products derived from Arthrospira were shown to successfully replace biomaterial scaffolds in regenerative medicine. Supplementation with the cyanobacterium also improves the health of livestock and quality of the products of animal origin. They were also used in cosmetic preparations.
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Affiliation(s)
- Magda A Furmaniak
- Chair and Department of Pharmaceutical Microbiology, Medical University of Gdańsk, Gdańsk, Poland
| | - Agnieszka E Misztak
- Department of Biotechnology, Intercollegiate Faculty of Biotechnology of University of Gdańsk and Medical University of Gdańsk, Gdańsk, Poland
| | - Martyna D Franczuk
- Chair and Department of Pharmaceutical Microbiology, Medical University of Gdańsk, Gdańsk, Poland
| | - Annick Wilmotte
- InBios-Centre for Protein Engineering, Department of Life Sciences, University of Liège, Liège, Belgium
| | - Małgorzata Waleron
- Department of Biotechnology, Intercollegiate Faculty of Biotechnology of University of Gdańsk and Medical University of Gdańsk, Gdańsk, Poland
| | - Krzysztof F Waleron
- Chair and Department of Pharmaceutical Microbiology, Medical University of Gdańsk, Gdańsk, Poland
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Azizi S, Mahdavi Shahri M, Rahman HS, Rahim RA, Rasedee A, Mohamad R. Green synthesis palladium nanoparticles mediated by white tea ( Camellia sinensis) extract with antioxidant, antibacterial, and antiproliferative activities toward the human leukemia (MOLT-4) cell line. Int J Nanomedicine 2017; 12:8841-8853. [PMID: 29276385 PMCID: PMC5734231 DOI: 10.2147/ijn.s149371] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Among nanoparticles used for medical applications, palladium nanoparticles (PdNPs) are among the least investigated. This study was undertaken to develop PdNPs by green synthesis using white tea (W.tea; Camellia sinensis) extract to produce the Pd@W.tea NPs. The Pd@W.tea NPs were characterized by UV–vis spectroscopy and X-ray diffractometry, and evaluated with transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The Pd@W.tea NPs were spherical (size 6–18 nm) and contained phenols and flavonoids acquired from the W.tea extract. Pd@W.tea NPs has good 1-diphenyl-2-picrylhydrazyl (DPPH), OH, and NO-scavenging properties as well as antibacterial effects toward Staphylococcus epidermidis and Escherichia coli. MTT assay showed that Pd@W.tea NPs (IC50 =0.006 μM) were more antiproliferative toward the human leukemia (MOLT-4) cells than the W.tea extract (IC50 =0.894 μM), doxorubicin (IC50 =2.133 μM), or cisplatin (IC50 =0.013 μM), whereas they were relatively innocuous for normal human fibroblast (HDF-a) cells. The anticancer cell effects of Pd@W.tea NPs are mediated through the induction of apoptosis and G2/M cell-cycle arrest.
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Affiliation(s)
- Susan Azizi
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia
| | | | - Heshu Sulaiman Rahman
- College of Veterinary Medicine, University of Sulaimani, Sulaimani Nwe.,College of Health Science, Komar University of Science and Technology (KUST), Chaq-Chaq Qularaise, Sulaimani City, Iraq.,Faculty of Veterinary Medicine
| | - Raha Abdul Rahim
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences
| | | | - Rosfarizan Mohamad
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia.,Laboratory of Biopolymer and Derivatives, Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia
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