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Duan W, Zhao J, Gao Y, Xu K, Huang S, Zeng L, Shen JW, Zheng Y, Wu J. Porous silicon-based sensing and delivery platforms for wound management applications. J Control Release 2024; 371:530-554. [PMID: 38857787 DOI: 10.1016/j.jconrel.2024.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 05/28/2024] [Accepted: 06/05/2024] [Indexed: 06/12/2024]
Abstract
Wound management remains a great challenge for clinicians due to the complex physiological process of wound healing. Porous silicon (PSi) with controlled pore morphology, abundant surface chemistry, unique photonic properties, good biocompatibility, easy biodegradation and potential bioactivity represent an exciting class of materials for various biomedical applications. In this review, we focus on the recent progress of PSi in the design of advanced sensing and delivery systems for wound management applications. Firstly, we comprehensively introduce the common type, normal healing process, delaying factors and therapeutic drugs of wound healing. Subsequently, the typical fabrication, functionalization and key characteristics of PSi have been summarized because they provide the basis for further use as biosensing and delivery materials in wound management. Depending on these properties, the rise of PSi materials is evidenced by the examples in literature in recent years, which has emphasized the robust potential of PSi for wound monitoring, treatment and theranostics. Finally, challenges and opportunities for the future development of PSi-based sensors and delivery systems for wound management applications are proposed and summarized. We hope that this review will help readers to better understand current achievements and future prospects on PSi-based sensing and delivery systems for advanced wound management.
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Affiliation(s)
- Wei Duan
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Lab of Nanomedicine and Omic-based Diagnostics, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, PR China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Jingwen Zhao
- Lab of Nanomedicine and Omic-based Diagnostics, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, PR China
| | - Yue Gao
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Keying Xu
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Sheng Huang
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Longhuan Zeng
- Department of Geriatric Medicine, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou 310006, PR China
| | - Jia-Wei Shen
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China.
| | - Yongke Zheng
- Department of Geriatric Medicine, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou 310006, PR China.
| | - Jianmin Wu
- Lab of Nanomedicine and Omic-based Diagnostics, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, PR China.
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2
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Minoretti P, Gómez Serrano M, Santiago Sáez A, Liaño Riera M, García Martín Á. Successful Management of Chronic Wounds by an Autophagy-Activating Magnetized Water-Based Gel in Elderly Patients: A Case Series. Cureus 2024; 16:e55937. [PMID: 38601405 PMCID: PMC11005079 DOI: 10.7759/cureus.55937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2024] [Indexed: 04/12/2024] Open
Abstract
Chronic wounds pose a significant threat to human health, particularly for the elderly, and require extensive healthcare resources globally. Autophagy, a key molecular player in wound healing, not only offers a defense against infections but also contributes to the deposition of the extracellular matrix during the proliferative phase. Additionally, it promotes the proliferation and differentiation of endothelial cells, fibroblasts, and keratinocytes. We have recently shown that applying magnetized saline water topically can trigger autophagy in intact skin. In this case series, we document the successful management of five non-infected, difficult-to-heal wounds in elderly patients using a topical autophagy-stimulating gel containing 95% magnetized saline water. The treated wounds included pressure ulcers, venous ulcers, and trauma-related injuries that had shown minimal or no improvement with standard wound therapies over a prolonged period. Application of the autophagy-stimulating gel promoted wound healing, as indicated by reduced fibrous and necrotic tissue, granulation tissue formation, re-epithelialization, and partial or complete wound closure. These preliminary case studies suggest that a topical gel containing magnetized saline water, which promotes autophagy, may aid healing of chronic wounds in elderly patients. Further investigation is warranted to explore the potential of this novel approach, as it may offer a valuable addition to the existing arsenal of wound care treatments for the aging population, particularly in addressing difficult-to-heal wounds.
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Affiliation(s)
| | - Manuel Gómez Serrano
- Legal Medicine, Psychiatry, and Pathology, Complutense University of Madrid, Madrid, ESP
| | - Andrés Santiago Sáez
- Legal Medicine, Hospital Clinico San Carlos, Madrid, ESP
- Legal Medicine, Psychiatry, and Pathology, Complutense University of Madrid, Madrid, ESP
| | - Miryam Liaño Riera
- Legal Medicine, Psychiatry, and Pathology, Complutense University of Madrid, Madrid, ESP
| | - Ángel García Martín
- Legal Medicine, Psychiatry, and Pathology, Complutense University of Madrid, Madrid, ESP
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3
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Cavallo I, Sivori F, Mastrofrancesco A, Abril E, Pontone M, Di Domenico EG, Pimpinelli F. Bacterial Biofilm in Chronic Wounds and Possible Therapeutic Approaches. BIOLOGY 2024; 13:109. [PMID: 38392327 PMCID: PMC10886835 DOI: 10.3390/biology13020109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/02/2024] [Accepted: 02/06/2024] [Indexed: 02/24/2024]
Abstract
Wound repair and skin regeneration is a very complex orchestrated process that is generally composed of four phases: hemostasis, inflammation, proliferation, and remodeling. Each phase involves the activation of different cells and the production of various cytokines, chemokines, and other inflammatory mediators affecting the immune response. The microbial skin composition plays an important role in wound healing. Indeed, skin commensals are essential in the maintenance of the epidermal barrier function, regulation of the host immune response, and protection from invading pathogenic microorganisms. Chronic wounds are common and are considered a major public health problem due to their difficult-to-treat features and their frequent association with challenging chronic infections. These infections can be very tough to manage due to the ability of some bacteria to produce multicellular structures encapsulated into a matrix called biofilms. The bacterial species contained in the biofilm are often different, as is their capability to influence the healing of chronic wounds. Biofilms are, in fact, often tolerant and resistant to antibiotics and antiseptics, leading to the failure of treatment. For these reasons, biofilms impede appropriate treatment and, consequently, prolong the wound healing period. Hence, there is an urgent necessity to deepen the knowledge of the pathophysiology of delayed wound healing and to develop more effective therapeutic approaches able to restore tissue damage. This work covers the wound-healing process and the pathogenesis of chronic wounds infected by biofilm-forming pathogens. An overview of the strategies to counteract biofilm formation or to destroy existing biofilms is also provided.
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Affiliation(s)
- Ilaria Cavallo
- Microbiology and Virology Unit, San Gallicano Dermatological Institute IRCSS, 00144 Rome, Italy
| | - Francesca Sivori
- Microbiology and Virology Unit, San Gallicano Dermatological Institute IRCSS, 00144 Rome, Italy
| | - Arianna Mastrofrancesco
- Microbiology and Virology Unit, San Gallicano Dermatological Institute IRCSS, 00144 Rome, Italy
| | - Elva Abril
- Microbiology and Virology Unit, San Gallicano Dermatological Institute IRCSS, 00144 Rome, Italy
| | - Martina Pontone
- Microbiology and Virology Unit, San Gallicano Dermatological Institute IRCSS, 00144 Rome, Italy
| | - Enea Gino Di Domenico
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of Rome, 00185 Rome, Italy
| | - Fulvia Pimpinelli
- Microbiology and Virology Unit, San Gallicano Dermatological Institute IRCSS, 00144 Rome, Italy
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4
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Zhang J, Si R, Gao Y, Shan H, Su Q, Feng Z, Huang P, Kong D, Wang W. dECM restores macrophage immune homeostasis and alleviates iron overload to promote DTPI healing. Regen Biomater 2024; 11:rbad118. [PMID: 38404617 PMCID: PMC10884736 DOI: 10.1093/rb/rbad118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 12/20/2023] [Accepted: 12/25/2023] [Indexed: 02/27/2024] Open
Abstract
Due to its highly insidious and rapid progression, deep tissue pressure injury (DTPI) is a clinical challenge. Our previous study found that DTPI may be a skeletal muscle injury dominated by macrophage immune dysfunction due to excessive iron accumulation. Decellularized extracellular matrix (dECM) hydrogel promotes skeletal muscle injury repair. However, its role in polarizing macrophages and regulating iron metabolism in DTPI remains unclear. Here, porcine dECM hydrogel was prepared, and its therapeutic function and mechanism in repairing DTPI were investigated. The stimulus of dECM hydrogel toward RAW264.7 cells resulted in a significantly higher percentage of CD206+ macrophages and notably decreased intracellular divalent iron levels. In mice DTPI model, dECM hydrogel treatment promoted M1 to M2 macrophage conversion, improved iron metabolism and reduced oxidative stress in the early stage of DTPI. In the remodeling phase, the dECM hydrogel remarkably enhanced revascularization and accelerated skeletal muscle repair. Furthermore, the immunomodulation of dECM hydrogels in vivo was mainly involved in the P13k/Akt signaling pathway, as revealed by GO and KEGG pathway analysis, which may ameliorate the iron deposition and promote the healing of DTPI. Our findings indicate that dECM hydrogel is promising in skeletal muscle repair, inflammation resolution and tissue injury healing by effectively restoring macrophage immune homeostasis and normalizing iron metabolism.
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Affiliation(s)
- Ju Zhang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
- School of Nursing, Qingdao University, Ningde Road, Shinan District, Qingdao, Shandong, 266071, China
| | - Ruijuan Si
- Cancer Hospital of Tianjin Medical University, North Huanhu West Road, Tianjin, China
| | - Yu Gao
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Hui Shan
- The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Shinan District, Qingdao, China
| | - Qi Su
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Zujian Feng
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Pingsheng Huang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | | | - Weiwei Wang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
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Hong Q, Dong X, Jones JE, Hong L, Yu Q, Sun H, Chen M. A novel approach to expedite wound healing with plasma brush of cold flame. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:084102. [PMID: 38065141 PMCID: PMC10431944 DOI: 10.1063/5.0096969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 07/18/2023] [Indexed: 12/18/2023]
Abstract
Excessive or persistent infection is a major contributing factor in impeding chronic wound healing. Wound bed preparations using antiseptics do not necessarily target the entire bacterial spectrum, and the highly proliferating granulation tissue may be sensitive to the cytotoxic effects, impairing tissue repair. Non-thermal gas atmospheric pressure plasmas are partially ionized gases that contain highly reactive particles while the gas phase remains near room temperature, thus having the capability of accessing small irregular cavities and fissures and killing bacteria because of the diffusive nature of gas phase plasma species that are chemically reactive, providing an ideal approach to topical wound disinfection. A non-thermal plasma brush device of novel design has been developed that is suitable for clinical application in the disinfection of oral and wound bacteria. In vivo studies have indicated that the plasma brush treatment rendered no harmful effect on healthy skin or tissues, while it could improve wound healing in Pseudomonas aeruginosa biofilm infected wounds exposed to an optimized treatment with argon plus 1% nitrogen (Ar + N2) plasma.
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Affiliation(s)
- Qing Hong
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri 65211, USA
| | | | | | - Liang Hong
- Department of Pediatric Dentistry and Community Oral Health, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tennessee 38163, USA
| | - Qingsong Yu
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri 65211, USA
| | - Hongmin Sun
- Division of Cardiovascular Medicine, Department of Medicine, University of Missouri, Columbia, Missouri 65212, USA
| | - Meng Chen
- Nanova, Inc., Columbia, Missouri 65202, USA
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6
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Eom Y, Eom SY, Lee J, Hwang S, Won J, Kim H, Chung S, Kim HJ, Lee MY. Therapeutic Effects and Underlying Mechanism of SOCS-com Gene-Transfected ADMSCs in Pressure Ulcer Mouse Models. Cells 2023; 12:1840. [PMID: 37508509 PMCID: PMC10378383 DOI: 10.3390/cells12141840] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/06/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023] Open
Abstract
Although the proportion of ulcer patients with medical problems among the elderly has increased with the extension of human life expectancy, treatment efficiency is drastically low, incurring substantial social costs. MSCs have independent regeneration potential, making them useful in clinical trials of difficult-to-treat diseases. In particular, ADMSCs are promising in the stem cell therapy industry as they can be obtained in vast amounts using non-invasive methods. Furthermore, studies are underway to enhance the regeneration potential of ADMSCs using cytokines, growth factors, and gene delivery to generate highly functional ADMSCs. In this study, key regulators of wound healing, SOCS-1, -3, and -5, were combined to maximize the regenerative potential of ADMSCs in pressure ulcer treatments. After transfecting SOCS-1, -3, -5, and SOCS-com into ADMSCs using a non-viral method, the expression of the inflammatory factors TNF-alpha, INF-gamma, and IL-10 was confirmed. ADMSCs transfected with SOCS-com showed decreased overall expression of inflammatory factors and increased expression of anti-inflammatory factors. Based on these results, we implanted ADMSCs transfected with SOCS-com into a pressure ulcer mouse model to observe their subsequent wound-healing effects. Notably, SOCS-com improved wound closure in ulcers, and reconstruction of the epidermis and dermis was observed. The healing mechanism of ADMSCs transfected with SOCS-com was examined by RNA sequencing. Gene analysis results confirmed that expression changes occurred in genes of key regulators of wound healing, such as chemokines, MMP-1, 9, CSF-2, and IL-33, and that such genetic changes enhanced wound healing in ulcers. Based on these results, we demonstrate the potential of ADMSCs transfected with SOCS-com as an ulcer treatment tool.
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Affiliation(s)
- Youngsic Eom
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan 31538, Republic of Korea
| | - So Young Eom
- School of Mechanical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Jeonghwa Lee
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan 31538, Republic of Korea
| | - Saeyeon Hwang
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 34943, Republic of Korea
| | - Jihee Won
- School of Mechanical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hyunsoo Kim
- School of Mechanical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seok Chung
- School of Mechanical Engineering, Korea University, Seoul 02841, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
- Center for Brain Technology, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Hye Joung Kim
- Institute of Chemical Engineering Convergence System, Korea University, Seoul 02841, Republic of Korea
| | - Mi-Young Lee
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan 31538, Republic of Korea
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7
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Meng H, Peng Y, Li P, Su J, Jiang Y, Fu X. Global trends in research of high-throughput sequencing technology associated with chronic wounds from 2002 to 2022: A bibliometric and visualized study. Front Surg 2023; 10:1089203. [PMID: 36911623 PMCID: PMC9992981 DOI: 10.3389/fsurg.2023.1089203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 02/06/2023] [Indexed: 02/24/2023] Open
Abstract
Background Chronic wounds are a complex medical problem. With the difficulty of skin healing, the microbial ecology of chronic wounds is an essential factor affecting wound healing. High-throughput sequencing (HTS) technology is a vital method to reveal the microbiome diversity and population structure of chronic wounds. Objective The aim of this paper was to delineate the scientific output characteristics, research trends, hotspots and frontiers of HTS technologies related to chronic wounds globally over the past 20 years. Methods We searched the Web of Science Core Collection (WoSCC) database for articles published between 2002 and 2022 and their full record information. The Bibliometrix software package was used to analyze bibliometric indicators and VOSviewer visualization analysis results. Results Ultimately, a total of 449 original articles were reviewed, and the results showed that the number of annual publications (Nps) about HTS associated with chronic wounds has steadily increased over the last 20 years. The United States and China produce the most articles and have the highest H-index, while the United States and England have the largest number of citations (Nc) in this field. The University of California, Wound Repair and Regeneration and National Institutes of Health Nih United States were the most published institutions, journals and fund resources, respectively. The global research could be divided into 3 clusters as follows: microbial infection of chronic wounds, the healing process of wounds and microscopic processes, skin repair mechanism stimulated by antimicrobial peptides and oxidative stress. In recent years, "wound healing", "infections", "expression", "inflammation", "chronic wounds", "identification" and "bacteria" "angiogenesis", "biofilms" and "diabetes" were the most frequently used keywords. In addition, research on "prevalence", "gene expression", "inflammation" and "infection" has recently become a hotspot. Conclusions This paper compares the research hotspots and directions in this field globally from the perspectives of countries, institutions and authors, analyzes the trend of international cooperation, and reveals the future development direction of the field and research hotspots of great scientific research value. Through this paper, we can further explore the value of HTS technology in chronic wounds to better solve the problem of chronic wounds.
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Affiliation(s)
- Hao Meng
- Research Center for Wound Repair and Tissue Regeneration, Medical Innovation Research Department, The PLA General Hospital, Beijing, China
| | - Yu Peng
- Research Center for Wound Repair and Tissue Regeneration, Medical Innovation Research Department, The PLA General Hospital, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Pinxue Li
- School of Medicine, Nankai University, Tianjin, China
| | - Jianlong Su
- Research Center for Wound Repair and Tissue Regeneration, Medical Innovation Research Department, The PLA General Hospital, Beijing, China
| | - Yufeng Jiang
- Research Center for Wound Repair and Tissue Regeneration, Medical Innovation Research Department, The PLA General Hospital, Beijing, China
| | - Xiaobing Fu
- Research Center for Wound Repair and Tissue Regeneration, Medical Innovation Research Department, The PLA General Hospital, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
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Adekoya O, Adekoya GJ, Sadiku RE, Hamam Y, Ray SS. Density Functional Theory Interaction Study of a Polyethylene Glycol-Based Nanocomposite with Cephalexin Drug for the Elimination of Wound Infection. ACS OMEGA 2022; 7:33808-33820. [PMID: 36188269 PMCID: PMC9520710 DOI: 10.1021/acsomega.2c02347] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 08/26/2022] [Indexed: 05/13/2023]
Abstract
In this paper, density functional theory (DFT) simulations are used to evaluate the possible use of a graphene oxide-based poly(ethylene glycol) (GO/PEG) nanocomposite as a drug delivery substrate for cephalexin (CEX), an antibiotic drug employed to treat wound infection. First, the stable configuration of the PEGylated system was generated with a binding energy of -25.67 kcal/mol at 1.62 Å through Monte Carlo simulation and DFT calculation for a favorable adsorption site. The most stable configuration shows that PEG interacts with GO through hydrogen bonding of the oxygen atom on the hydroxyl group of PEG with the hydrogen atom of the carboxylic group on GO. Similarly, for the interaction of the CEX drug with the GO/PEG nanocomposite excipient system, the adsorption energies are computed after determining the optimal and thermodynamically favorable configuration. The nitrogen atom from the amine group of the drug binds with a hydrogen atom from the carboxylic group of the GO/PEG nanocomposite at 1.75 Å, with an adsorption energy of -36.17 kcal/mol, in the most stable drug-excipient system. Drug release for tissue regeneration at the predicted target cell is more rapid in moist conditions than in the gas phase. The solubility of the suggested drug in the aqueous media around the open wound is shown by the magnitude of the predicted solvation energy. The findings from this study theoretically validate the potential use of a GO/PEG nanocomposite for wound treatment application as a drug carrier for sustained release of the CEX drug.
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Affiliation(s)
- Oluwasegun
Chijioke Adekoya
- Institute
of Nanoengineering Research (INER), Department of Chemical, Metallurgical
and Materials Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria 0001, South Africa
| | - Gbolahan Joseph Adekoya
- Institute
of Nanoengineering Research (INER), Department of Chemical, Metallurgical
and Materials Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria 0001, South Africa
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
| | - Rotimi Emmanuel Sadiku
- Institute
of Nanoengineering Research (INER), Department of Chemical, Metallurgical
and Materials Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria 0001, South Africa
| | - Yskandar Hamam
- Department
of Electrical Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria 001, South Africa
- École
Supérieure d’Ingénieurs en Électrotechnique
et Électronique, Cité Descartes, 2 Boulevard Blaise Pascal, Noisy-le-Grand, Paris 93160, France
| | - Suprakas Sinha Ray
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
- Department
of Chemical Sciences, University of Johannesburg, Doornforntein, Johannesburg 2028, South
Africa
- , ,
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9
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Cifuentes J, Muñoz-Camargo C, Cruz JC. Reduced Graphene Oxide-Extracellular Matrix Scaffolds as a Multifunctional and Highly Biocompatible Nanocomposite for Wound Healing: Insights into Characterization and Electroconductive Potential. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2857. [PMID: 36014722 PMCID: PMC9415408 DOI: 10.3390/nano12162857] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 07/29/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
The development of novel regenerative technologies based on the implementation of natural extracellular matrix (ECM), or individual components of ECM combined with multifunctional nanomaterials such as graphene oxide and reduced graphene oxide, has demonstrated remarkable results in wound healing and tissue engineering. However, the synthesis of these nanocomposites involves great challenges related to maintaining the biocompatibility with a simultaneous improvement in their functionalities. Based on that, in this research we developed novel nanoengineered ECM-scaffolds formed by mixing small intestinal submucosa (SIS) with graphene oxide (GO)/reduced graphene oxide (rGO) to improve electrical conductivity while maintaining remarkable biocompatibility. For this, decellularized SIS was combined with GO to form the scaffold precursor for subsequent lyophilization, chemically crosslinking and in situ reduction. The obtained GO and rGO were characterized via Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), electrical conductivity testing and atomic force microscopy (AFM). The results confirm the suitable synthesis of GO, the effective reduction to rGO and the significant increase in the electrical conductivity (more than four orders of magnitude higher than bare GO). In addition, the graphene oxide/reduced graphene oxide-SIS scaffolds were characterized via Raman spectroscopy, FTIR, TGA, SEM, porosity assay (higher than 97.5% in all cases) and protein secondary structural analysis. Moreover, the biocompatibility of scaffolds was studied by standardized assays of hemolysis activity (less than 0.5%), platelet activation and deposition, and cell viability in Vero, HaCat and HFF-1 cells (higher than 90% for all evaluated cell lines on the different scaffolds). The obtained results confirm the remarkable biocompatibility, as supported by high hemocompatibility, low cytotoxicity and no negative impact on platelet activation and deposition. Finally, structural characteristics such as pore size and interconnectivity as well as superior cell attachment abilities also corroborated the potential of the developed nanoengineered ECM-scaffolds as a multifunctional nanoplatform for application in regenerative medicine and tissue engineering.
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10
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Trubenová B, Roizman D, Moter A, Rolff J, Regoes RR. Population genetics, biofilm recalcitrance, and antibiotic resistance evolution. Trends Microbiol 2022; 30:841-852. [PMID: 35337697 DOI: 10.1016/j.tim.2022.02.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 12/11/2022]
Abstract
Biofilms are communities of bacteria forming high-density sessile colonies. Such a lifestyle comes associated with costs and benefits: while the growth rate of biofilms is often lower than that of their free-living counterparts, this cost is readily repaid once the colony is subjected to antibiotics. Biofilms can grow in antibiotic concentrations a thousand times higher than planktonic bacteria. While numerous mechanisms have been proposed to explain biofilm recalcitrance towards antibiotics, little is yet known about their effect on the evolution of resistance. We synthesize the current understanding of biofilm recalcitrance from a pharmacodynamic and a population genetics perspective. Using the pharmacodynamic framework, we discuss the effects of various mechanisms and show that biofilms can either promote or impede resistance evolution.
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Affiliation(s)
| | - Dan Roizman
- Institute of Biology, Evolutionary Biology, Freie Universität Berlin, Germany
| | - Annette Moter
- Charité, Universitätsmedizin Berlin Biofilmcenter, Berlin, Germany
| | - Jens Rolff
- Institute of Biology, Evolutionary Biology, Freie Universität Berlin, Germany
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11
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Schollemann F, Kunczik J, Dohmeier H, Pereira CB, Follmann A, Czaplik M. Infection Probability Index: Implementation of an Automated Chronic Wound Infection Marker. J Clin Med 2021; 11:jcm11010169. [PMID: 35011910 PMCID: PMC8745914 DOI: 10.3390/jcm11010169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 01/09/2023] Open
Abstract
The number of people suffering from chronic wounds is increasing due to demographic changes and the global epidemics of obesity and diabetes. Innovative imaging techniques within the field of chronic wound diagnostics are required to improve wound care by predicting and detecting wound infections to accelerate the application of treatments. For this reason, the infection probability index (IPI) is introduced as a novel infection marker based on thermal wound imaging. To improve usability, the IPI was implemented to automate scoring. Visual and thermal image pairs of 60 wounds were acquired to test the implemented algorithms on clinical data. The proposed process consists of (1) determining various parameters of the IPI based on medical hypotheses, (2) acquiring data, (3) extracting camera distortions using camera calibration, and (4) preprocessing and (5) automating segmentation of the wound to calculate (6) the IPI. Wound segmentation is reviewed by user input, whereas the segmented area can be refined manually. Furthermore, in addition to proof of concept, IPIs’ correlation with C-reactive protein (CRP) levels as a clinical infection marker was evaluated. Based on average CRP levels, the patients were clustered into two groups, on the basis of the separation value of an averaged CRP level of 100. We calculated the IPIs of the 60 wound images based on automated wound segmentation. Average runtime was less than a minute. In the group with lower average CRP, a correlation between IPI and CRP was evident.
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Preparation and Pharmacokinetic Characterization of an Anti-Virulence Compound Nanosuspensions. Pharmaceutics 2021; 13:pharmaceutics13101586. [PMID: 34683879 PMCID: PMC8540953 DOI: 10.3390/pharmaceutics13101586] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 09/23/2021] [Accepted: 09/25/2021] [Indexed: 12/05/2022] Open
Abstract
Antibiotic resistance has become a worldwide public health threat due to the rapid evolution and spread of antibiotic-resistant bacteria. CCG-211790 is a novel anti-virulence compound that does not kill bacteria but could ameliorate human diseases by inhibiting expression of virulence factors, thereby applying less selection pressure for antibiotic resistance. However, its potential clinical use is restricted because of its poor aqueous solubility, resulting in formulation challenges. Nanosuspension technology is an effective way to circumvent this problem. Nanosuspensions of CCG-211790 with two different particle sizes, NanoA (315 ± 6 nm) and NanoB (915 ± 24 nm), were prepared using an antisolvent precipitation-ultrasonication method with Tween 80 as the stabilizer. Particle and pharmacokinetics (PK) of CCG-211790 nanosuspensions were characterized. Both NanoA and NanoB demonstrated remarkable increases in dissolution rate compared with the bulk compound. The PK parameters of NanoA were comparable to those of CCG-211790 solution formulation in intravenous or oral administration, suggesting that CCG-211790 nanosuspensions with smaller particle size improved oral bioavailability and drug exposure compared to traditional formulations of drug candidates.
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Guarro G, Cozzani F, Rossini M, Bonati E, Del Rio P. The modified TIME-H scoring system, a versatile tool in wound management practice: a preliminary report. ACTA BIO-MEDICA : ATENEI PARMENSIS 2021; 92:e2021226. [PMID: 34487096 PMCID: PMC8477093 DOI: 10.23750/abm.v92i4.10666] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 09/24/2020] [Indexed: 11/24/2022]
Abstract
Background and Aims: The concept of WBP (wound bed preparation) has revolutionized the way to diagnose and correctly identify the best therapeutic path about the widespread clinical problem of difficult wounds. Starting from the modified TIME-H, authors conducted a preliminary study with the aim of assessing the impact of skin lesions and soft tissues for the surgical patient. Materials and Methods: 38 patients were preliminarily evaluated. The patients were classified according to the lesion examined, in particular among those who had an infectious or vascular etiology (SSTIs), and patients with surgical site lesions (SSI) and assigned to one of three categories prognosis: favorable (with healing expected within 12 weeks) (0-3A, 0-1B), intermediate (with healing expected over 12 weeks) (4-6A, 2-4B) and uncertain healing (7-8A, 5-8B). Results: At the end of the one-year observation period, authors established the healing prediction rate among the studied lesions: the surgical site lesions presented the highest percentage of predictivity (88%), followed by the mixed etiology (72%) and the infectious/vascular injuries (63%). Conclusion: This modified-TIME-H can be considered as a versatile and useful scoring tool that should be used in daily clinical practice for the study and treatment of chronic wound diseases.
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Affiliation(s)
- Giuseppe Guarro
- Translational Medical and Surgical Sciences PhD Program, University of Parma.
| | | | | | - Elena Bonati
- General Surgery Unit, University Hospital of Parma.
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Li M, Hou Q, Zhong L, Zhao Y, Fu X. Macrophage Related Chronic Inflammation in Non-Healing Wounds. Front Immunol 2021; 12:681710. [PMID: 34220830 PMCID: PMC8242337 DOI: 10.3389/fimmu.2021.681710] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/27/2021] [Indexed: 12/14/2022] Open
Abstract
Persistent hyper-inflammation is a distinguishing pathophysiological characteristic of chronic wounds, and macrophage malfunction is considered as a major contributor thereof. In this review, we describe the origin and heterogeneity of macrophages during wound healing, and compare macrophage function in healing and non-healing wounds. We consider extrinsic and intrinsic factors driving wound macrophage dysregulation, and review systemic and topical therapeutic approaches for the restoration of macrophage response. Multidimensional analysis is highlighted through the integration of various high-throughput technologies, used to assess the diversity and activation states as well as cellular communication of macrophages in healing and non-healing wound. This research fills the gaps in current literature and provides the promising therapeutic interventions for chronic wounds.
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Affiliation(s)
- Meirong Li
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Division and 4 Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, PLA General Hospital, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, Beijing, China
- Central Laboratory, Trauma Treatment Center, Central Laboratory, Chinese PLA General Hospital, Hainan Hospital, Sanya, China
| | - Qian Hou
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Division and 4 Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, PLA General Hospital, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, Beijing, China
| | - Lingzhi Zhong
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Division and 4 Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, PLA General Hospital, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, Beijing, China
| | - Yali Zhao
- Central Laboratory, Trauma Treatment Center, Central Laboratory, Chinese PLA General Hospital, Hainan Hospital, Sanya, China
| | - Xiaobing Fu
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Division and 4 Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, PLA General Hospital, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, Beijing, China
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Nanostructured lipid carriers containing chitosan or sodium alginate for co-encapsulation of antioxidants and an antimicrobial agent for potential application in wound healing. Int J Biol Macromol 2021; 183:668-680. [PMID: 33930450 DOI: 10.1016/j.ijbiomac.2021.04.168] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/13/2021] [Accepted: 04/25/2021] [Indexed: 12/23/2022]
Abstract
The high incidence and costs of chronic wounds in the elderly have motivated the search for innovations to improve product performance and the healing process while reducing costs. In this study, bioadhesive nanostructured lipid carriers (NLC) were developed for the co-encapsulation of compounds with antioxidant (α-tocopherol and quercetin) and antimicrobial (tea tree oil) activity for management of wounds. The NLC was produced with shea butter and argan oil, and modified with sodium alginate or chitosan to confer bioadhesive properties. Spherical nanoparticles of ~307-330 nm and zeta potential varying from -21.2 to +11.8 mV were obtained. Thermal analysis demonstrated that the lipid matrix reduced tea tree oil thermal loss (~1.8-fold). Regardless of the type of polysaccharide employed, the NLCs promoted cutaneous localization of antioxidants in damaged (subjected to incision) skin, with a ~74 to 180-fold higher delivery into the skin compared to percutaneous delivery. This result is consistent with the similar bioadhesive properties of chitosan or sodium alginate-modified NLC. Nanoencapsulation of tea tree oil did not preclude its antimicrobial effects against susceptible and resistant strains of S. aureus and P. aeruginosa, while co-encapsulation of antioxidants increased the NLC-induced fibroblasts migration, supporting their potential usefulness for management of wounds.
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