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Dugam S, Jain R, Dandekar P. Silver nanoparticles loaded triple-layered cellulose-acetate based multifunctional dressing for wound healing. Int J Biol Macromol 2024; 276:133837. [PMID: 39009263 DOI: 10.1016/j.ijbiomac.2024.133837] [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: 03/04/2024] [Revised: 06/07/2024] [Accepted: 07/11/2024] [Indexed: 07/17/2024]
Abstract
Chronic wounds present considerable challenges which delay their effective healing. Currently, there are several biomaterial-based wound dressings available for healing diverse wound types. However, most of commercial wound dressings are too expensive to be affordable to the patients belonging to the middle and lower socioeconomic strata of the society. Thus, in this investigation affordable triple layered nanofibrous bandages were fabricated using the layer-by-layer approach. Here, the topmost layer comprised of a hydrophilic poly vinyl alcohol layer, cross-linked with citric acid. The middle layer comprising of cellulose acetate was loaded with silver nanoparticles as an antibacterial agent, while the lowermost layer was fabricated using hydrophobic polycaprolactone. The triple-layered nanofibrous bandages having a nano-topography, exhibited a smooth, uniform and bead-free morphology, with the nanofiber diameter ranging between 200 and 300 nm. The nanofibers demonstrated excellent wettability, slow in vitro degradation, controlled release of nano‑silver and potent antibacterial activity against Gram-negative (E.coli) and Gram-positive (S. aureus) bacteria. The fabricated bandages had excellent mechanical strength upto 12.72 ± 0.790 M. Pa, which was suitable for biomedical and tissue engineering applications. The bandage demonstrated excellent in vitro hemocompatibility and biocompatibility. In vivo excisional wound contraction, along with H and E and Masson's Trichrome staining further confirmed the potential of the nanofibrous bandage for full-thickness wound healing. Pre-clinical investigations thus indicated the possibility of further evaluating the triple-layered nanofibrous dressing in clinical settings.
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Affiliation(s)
- Shailesh Dugam
- Department of Pharmaceutical sciences and technology, Institute of Chemical Technology, Mumbai, India
| | - Ratnesh Jain
- Department of Biological sciences and biotechnology, Institute of Chemical Technology, Mumbai, India.
| | - Prajakta Dandekar
- Department of Pharmaceutical sciences and technology, Institute of Chemical Technology, Mumbai, India.
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2
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Sheng L, Wang Z, Song L, Yang X, Ye Y, Sun J, Ji J, Geng S, Ning D, Zhang Y, Sun X. Antimicrobial carbon dots/pectin-based hydrogel for promoting healing processes in multidrug-resistant bacteria-infected wounds. Int J Biol Macromol 2024; 264:130477. [PMID: 38428784 DOI: 10.1016/j.ijbiomac.2024.130477] [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: 10/30/2023] [Revised: 02/24/2024] [Accepted: 02/26/2024] [Indexed: 03/03/2024]
Abstract
Multidrug-resistant (MDR) bacterial infections have become a significant threat to global healthcare systems. Here, we developed a highly efficient antimicrobial hydrogel using environmentally friendly garlic carbon dots, pectin, and acrylic acid. The hydrogel had a porous three-dimensional network structure, which endowed it with good mechanical properties and compression recovery performance. The hydrogel could adhere closely to skin tissues and had an equilibrium swelling ratio of 6.21, indicating its potential as a wound dressing. In particular, the bactericidal efficacy following 24-h contact against two MDR bacteria could exceed 99.99 %. When the hydrogel was applied to epidermal wounds infected with methicillin-resistant Staphylococcus aureus (MRSA) on mice, a remarkable healing rate of 93.29 % was observed after 10 days. This was better than the effectiveness of the traditionally used antibiotic kanamycin, which resulted in a healing rate of 70.36 %. In vitro cytotoxicity testing and hemolysis assay demonstrated a high biocompatibility. This was further proved by the in vivo assay where no toxic side effects were observed on the heart, liver, spleen, lung, or kidney of mice. This eco-friendly and easy-to-prepare food-inspired hydrogel provides an idea for the rational use of food and food by-products as a wound dressing to control MDR bacterial infections.
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Affiliation(s)
- Lina Sheng
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, Jiangsu 214200, PR China
| | - Ziyue Wang
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, Jiangsu 214200, PR China
| | - Liyao Song
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, Jiangsu 214200, PR China
| | - Xingxing Yang
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, Jiangsu 214200, PR China
| | - Yongli Ye
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, Jiangsu 214200, PR China
| | - Jiadi Sun
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, Jiangsu 214200, PR China
| | - Jian Ji
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, Jiangsu 214200, PR China
| | - Shuxiang Geng
- Yunnan Academy of Forestry and Grassland, Kunming, Yunnan 650201, PR China
| | - Delu Ning
- Yunnan Academy of Forestry and Grassland, Kunming, Yunnan 650201, PR China
| | - Yinzhi Zhang
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, PR China
| | - Xiulan Sun
- School of Food Science and Technology, International Joint Laboratory on Food Safety, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, PR China; Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, Jiangsu 214200, PR China.
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3
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Šuca H, Čoma M, Tomšů J, Sabová J, Zajíček R, Brož A, Doubková M, Novotný T, Bačáková L, Jenčová V, Kuželová Košťáková E, Lukačín Š, Rejman D, Gál P. Current Approaches to Wound Repair in Burns: How far Have we Come From Cover to Close? A Narrative Review. J Surg Res 2024; 296:383-403. [PMID: 38309220 DOI: 10.1016/j.jss.2023.12.043] [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: 08/10/2023] [Revised: 12/06/2023] [Accepted: 12/29/2023] [Indexed: 02/05/2024]
Abstract
Burn injuries are a significant global health concern, with more than 11 million people requiring medical intervention each year and approximately 180,000 deaths annually. Despite progress in health and social care, burn injuries continue to result in socioeconomic burdens for victims and their families. The management of severe burn injuries involves preventing and treating burn shock and promoting skin repair through a two-step procedure of covering and closing the wound. Currently, split-thickness/full-thickness skin autografts are the gold standard for permanent skin substitution. However, deep burns treated with split-thickness skin autografts may contract, leading to functional and appearance issues. Conversely, defects treated with full-thickness skin autografts often result in more satisfactory function and appearance. The development of tissue-engineered dermal templates has further expanded the scope of wound repair, providing scar reductive and regenerative properties that have extended their use to reconstructive surgical interventions. Although their interactions with the wound microenvironment are not fully understood, these templates have shown potential in local infection control. This narrative review discusses the current state of wound repair in burn injuries, focusing on the progress made from wound cover to wound closure and local infection control. Advancements in technology and therapies hold promise for improving the outcomes for burn injury patients. Understanding the underlying mechanisms of wound repair and tissue regeneration may provide new insights for developing more effective treatments in the future.
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Affiliation(s)
- Hubert Šuca
- Prague Burn Center, Third Faculty of Medicine, Charles University and Královské Vinohrady University Hospital, Prague, Czech Republic
| | - Matúš Čoma
- Department of Pharmacology, Faculty of Medicine, Pavol Jozef Šafárik University, Košice, Slovak Republic; Department of Biomedical Research, East-Slovak Institute of Cardiovascular Diseases, Inc, Košice, Slovak Republic
| | - Júlia Tomšů
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jana Sabová
- Department of Pharmacology, Faculty of Medicine, Pavol Jozef Šafárik University, Košice, Slovak Republic
| | - Robert Zajíček
- Prague Burn Center, Third Faculty of Medicine, Charles University and Královské Vinohrady University Hospital, Prague, Czech Republic
| | - Antonín Brož
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Martina Doubková
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Tomáš Novotný
- Department of Orthopaedics, University J.E. Purkině and Masaryk Hospital, Ústí nad Labem, Czech Republic; Department of Histology and Embryology, Second Faculty of Medicine, Charles University, Prague, Czech Republic; Department of Orthopaedic Surgery, Faculty of Medicine in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Lucie Bačáková
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Věra Jenčová
- Department of Chemistry, Faculty of Science, Humanities and Education, Technical University of Liberec, Liberec, Czech Republic
| | - Eva Kuželová Košťáková
- Department of Chemistry, Faculty of Science, Humanities and Education, Technical University of Liberec, Liberec, Czech Republic
| | - Štefan Lukačín
- Department of Heart Surgery, East-Slovak Institute of Cardiovascular Diseases, Inc, Košice, Slovak Republic
| | - Dominik Rejman
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Peter Gál
- Prague Burn Center, Third Faculty of Medicine, Charles University and Královské Vinohrady University Hospital, Prague, Czech Republic; Department of Pharmacology, Faculty of Medicine, Pavol Jozef Šafárik University, Košice, Slovak Republic; Department of Biomedical Research, East-Slovak Institute of Cardiovascular Diseases, Inc, Košice, Slovak Republic; Department of Pharmacognosy and Botany, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic; Biomedical Research Center of the Slovak Academy of Sciences, Košice, Slovak Republic.
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Blanquer A, Kostakova EK, Filova E, Lisnenko M, Broz A, Mullerova J, Novotny V, Havlickova K, Jakubkova S, Hauzerova S, Heczkova B, Prochazkova R, Bacakova L, Jencova V. A novel bifunctional multilayered nanofibrous membrane combining polycaprolactone and poly (vinyl alcohol) enriched with platelet lysate for skin wound healing. NANOSCALE 2024; 16:1924-1941. [PMID: 38170860 DOI: 10.1039/d3nr04705a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Skin wound healing is a complex physiological process that involves various cell types, growth factors, cytokines, and other bioactive compounds. In this study, a novel dual-function multilayered nanofibrous membrane is developed for chronic wound application. The membrane is composed of five alternating layers of polycaprolactone (PCL) and poly (vinyl alcohol) (PVA) nanofibers (PCL-PVA) with a dual function: the PCL nanofibrous layers allow cell adhesion and growth, and the PVA layers enriched with incorporated platelet lysate (PCL-PVA + PL) serve as a drug delivery system for continuous release of bioactive compounds from PL into an aqueous environment. The material is produced using a needleless multi-jet electrospinning approach which can lead to homogeneous large-scale production. The bioactive PCL-PVA + PL membranes are cytocompatible and hemocompatible. A spatially compartmented co-culture of three cell types involved in wound healing - keratinocytes, fibroblasts and endothelial cells - is used for cytocompatibility studies. PCL-PVA + PL membranes enhance the proliferation of all cell types and increase the migration of both fibroblasts and endothelial cells. The membranes are also hemocompatible without any deleterious effect for thrombogenicity, hemolysis and coagulation. Thus, the beneficial effect of the PCL-PVA + PL membrane is demonstrated in vitro, making it a promising scaffold for the treatment of chronic wounds.
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Affiliation(s)
- Andreu Blanquer
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola del Vallès, 08193, Spain.
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 142 00 Prague 4-Krc, Czech Republic
| | - Eva Kuzelova Kostakova
- Technical University of Liberec, Faculty of Science, Humanities and Education, Studentska 1402/2, Liberec, 46117, Czech Republic
| | - Elena Filova
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 142 00 Prague 4-Krc, Czech Republic
| | - Maxim Lisnenko
- Technical University of Liberec, Faculty of Science, Humanities and Education, Studentska 1402/2, Liberec, 46117, Czech Republic
| | - Antonin Broz
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 142 00 Prague 4-Krc, Czech Republic
| | - Jana Mullerova
- Technical University of Liberec, Faculty of Science, Humanities and Education, Studentska 1402/2, Liberec, 46117, Czech Republic
- The Institute for Nanomaterials, Advanced Technologies and Innovation, Bendlova 1409/7, Liberec, 460 01, Czech Republic
| | - Vit Novotny
- The Institute for Nanomaterials, Advanced Technologies and Innovation, Bendlova 1409/7, Liberec, 460 01, Czech Republic
| | - Kristyna Havlickova
- Technical University of Liberec, Faculty of Science, Humanities and Education, Studentska 1402/2, Liberec, 46117, Czech Republic
| | - Sarka Jakubkova
- Regional Hospital Liberec, Husova 357/28, Liberec, 460 01, Czech Republic
| | - Sarka Hauzerova
- Technical University of Liberec, Faculty of Science, Humanities and Education, Studentska 1402/2, Liberec, 46117, Czech Republic
| | - Bohdana Heczkova
- Regional Hospital Liberec, Husova 357/28, Liberec, 460 01, Czech Republic
| | - Renata Prochazkova
- Regional Hospital Liberec, Husova 357/28, Liberec, 460 01, Czech Republic
- Faculty of Health, Technical University of Liberec, Studentska 1402/2, Liberec, 461 17, Czech Republic
| | - Lucie Bacakova
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 142 00 Prague 4-Krc, Czech Republic
| | - Vera Jencova
- Technical University of Liberec, Faculty of Science, Humanities and Education, Studentska 1402/2, Liberec, 46117, Czech Republic
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5
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Dugić M, Brzobohatá H, Mojr V, Dolejšová T, Lišková P, Do Pham DD, Rejman D, Mikušová G, Fišer R. LEGO-lipophosphonoxins: length of hydrophobic module affects permeabilizing activity in target membranes of different phospholipid composition. RSC Adv 2024; 14:2745-2756. [PMID: 38234873 PMCID: PMC10792433 DOI: 10.1039/d3ra07251g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/05/2024] [Indexed: 01/19/2024] Open
Abstract
In the past few decades, society has faced rapid development and spreading of antimicrobial resistance due to antibiotic misuse and overuse and the immense adaptability of bacteria. Difficulties in obtaining effective antimicrobial molecules from natural sources challenged scientists to develop synthetic molecules with antimicrobial effect. We developed modular molecules named LEGO-Lipophosphonoxins (LEGO-LPPO) capable of inducing cytoplasmic membrane perforation. In this structure-activity relationship study we focused on the role of the LEGO-LPPO hydrophobic module directing the molecule insertion into the cytoplasmic membrane. We selected three LEGO-LPPO molecules named C9, C8 and C7 differing in the length of their hydrophobic chain and consisting of an alkenyl group containing one double bond. The molecule with the long hydrophobic chain (C9) was shown to be the most effective with the lowest MIC and highest perforation rate both in vivo and in vitro. We observed high antimicrobial activity against both G+ and G- bacteria with significant differences in LEGO-LPPOs mechanism of action on these two cell types. We observed a highly cooperative mechanism of LEGO-LPPO action on G- bacteria as well as on liposomes resembling G- bacteria. LEGO-LPPO action on G- bacteria was significantly slower compared to G+ bacteria suggesting the role of the outer membrane in affecting the LEGO-LPPOs perforation rate. This notion was supported by the higher sensitivity of the E. coli strain with a compromised outer membrane. Finally, we noted that the composition of the cytoplasmic membrane affects the activity of LEGO-LPPOs since the presence of phosphatidylethanolamine increases their membrane disrupting activity.
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Affiliation(s)
- Milica Dugić
- Department of Genetics and Microbiology, Faculty of Science, Charles University Viničná 5 128 00 Prague 2 Czech Republic
| | - Hana Brzobohatá
- Department of Genetics and Microbiology, Faculty of Science, Charles University Viničná 5 128 00 Prague 2 Czech Republic
| | - Viktor Mojr
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v. v. i. Flemingovo nám. 2 166 10 Prague 6 Czech Republic
| | - Tereza Dolejšová
- Department of Genetics and Microbiology, Faculty of Science, Charles University Viničná 5 128 00 Prague 2 Czech Republic
| | - Petra Lišková
- Department of Genetics and Microbiology, Faculty of Science, Charles University Viničná 5 128 00 Prague 2 Czech Republic
| | - Duy Dinh Do Pham
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v. v. i. Flemingovo nám. 2 166 10 Prague 6 Czech Republic
| | - Dominik Rejman
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v. v. i. Flemingovo nám. 2 166 10 Prague 6 Czech Republic
| | - Gabriela Mikušová
- Department of Genetics and Microbiology, Faculty of Science, Charles University Viničná 5 128 00 Prague 2 Czech Republic
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v. v. i. Flemingovo nám. 2 166 10 Prague 6 Czech Republic
| | - Radovan Fišer
- Department of Genetics and Microbiology, Faculty of Science, Charles University Viničná 5 128 00 Prague 2 Czech Republic
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Šebek V, Anzenbacher P, Rejman D, Špičáková A, Kolář M. Lipophosphonoxins-A Novel Group of Broad Spectrum Antibacterial Compounds. Pharmaceutics 2023; 15:2395. [PMID: 37896155 PMCID: PMC10610469 DOI: 10.3390/pharmaceutics15102395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/24/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
Lipophosphonoxins (LPPOs) represent a new group of membrane-targeting antibiotics. Three generations of LPPOs have been described: First-generation LPPOs, second-generation LPPOs, and LEGO-LPPOs. All three generations have a similar mode of bactericidal action of targeting and disrupting the bacterial cytoplasmic membrane of prokaryotic cells, with limited effect on eukaryotic cells. First-generation LPPOs showed excellent bactericidal activity against Gram-positive species, including multiresistant strains. Second-generation LPPOs broaden the antibiotic effect also against Gram-negative bacteria. However, both first- and second-generation LPPOs lose their antibacterial activity in the presence of serum albumin. LEGO-LPPOs were found to be active against both Gram-positive and Gram-negative bacteria, have better selectivity as compared to first- and second-generation resistance to LEGO-LPPOs was also not observed, and are active even in the presence of serum albumin. Second-generation LPPOs have been studied as antimicrobial additives in bone cement and as nanofiber dressing components in the treatment of wound infections in mice. Second-generation LPPOs and LEGO-LPPOs were also tested to treat ex vivo simulated endodontic infections in dental root canals. The results of all these studies were encouraging and suggested further investigation of LPPOs in these indications. This paper aims to review and compile published data on LPPOs.
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Affiliation(s)
- Viktor Šebek
- Department of Pharmacology, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 775 15 Olomouc, Czech Republic; (V.Š.); (P.A.)
| | - Pavel Anzenbacher
- Department of Pharmacology, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 775 15 Olomouc, Czech Republic; (V.Š.); (P.A.)
| | - Dominik Rejman
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Fleming Square 542/2, 160 00 Prague, Czech Republic;
| | - Alena Špičáková
- Department of Pharmacology, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 775 15 Olomouc, Czech Republic; (V.Š.); (P.A.)
| | - Milan Kolář
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 775 15 Olomouc, Czech Republic
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Lv Y, Wu W, Liu Z, Zheng G, Wang L, Che X. Bilayer nanofibrous wound dressing prepared by electrospinning containing gallic acid and quercetin with improved biocompatibility, antibacterial, and antioxidant effects. Pharm Dev Technol 2023; 28:18-29. [PMID: 36546710 DOI: 10.1080/10837450.2022.2160734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTEIVES The purpose of this study was to prepare an antibacterial, antioxidant, and biocompatible bilayer nanofibrous wound dressing by using electrospinning. METHODS The micromorphology and bilayer structure characteristics of the GA-Qe-PVP-PCL nanofibers were analyzed by SEM. The physicochemical characteristics were analyzed by XRD and FTIR. The uptake, mechanical properties, water contact angle, water vapor transmission and in vitro drug release were evaluated. In addition, the effect of antibacterial, antioxidant and biocompatability of the nanofibers were evaluated, respectively. RESULTS The SEM results showed that the GA-Qe-PVP-PCL nanofibers had a smooth surface, no beading phenomenon, and a prominent bilayer structure. The diameter and porosity of the drug-loading layer and waterproof support layer of the nanofibers were 842 ± 302 nm, 242 ± 50 nm, and 88.56 ± 1.67%, 94.49 ± 1.57%, respectively. Moreover, the water uptake, mechanical properties, water contact angle, and water vapor transmission showed ideal performance. The results of in vitro drug release indicated that GA and Qe were both released rapidly, which was conducive to accelerating wound healing. The GA-Qe-PVP-PCL nanofibers exhibited antibacterial effects against both bacteria as well as high antioxidant activity. Additionally, the GA-Qe-PVP-PCL nanofibers possessed good compatibility, could promote the proliferation, adhesion, and migration of L929 fibroblast cells. CONCLUSION The nanofibers we developed met the requirements of ideal materials for wound dressing, which makes the nanofibers the potential to be a wound dressing for wound care.
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Affiliation(s)
- Yuanju Lv
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Wenli Wu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Zemei Liu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Guangyan Zheng
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Lihong Wang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Xin Che
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
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8
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Lima A, França A, Muzny CA, Taylor CM, Cerca N. DNA extraction leads to bias in bacterial quantification by qPCR. Appl Microbiol Biotechnol 2022; 106:7993-8006. [PMID: 36374332 PMCID: PMC10493044 DOI: 10.1007/s00253-022-12276-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 10/28/2022] [Accepted: 11/02/2022] [Indexed: 11/16/2022]
Abstract
Quantitative PCR (qPCR) has become a widely used technique for bacterial quantification. The affordability, ease of experimental design, reproducibility, and robustness of qPCR experiments contribute to its success. The establishment of guidelines for minimum information for publication of qPCR experiments, now more than 10 years ago, aimed to mitigate the publication of contradictory data. Unfortunately, there are still a significant number of recent research articles that do not consider the main pitfalls of qPCR for quantification of biological samples, which undoubtedly leads to biased experimental conclusions. qPCR experiments have two main issues that need to be properly tackled: those related to the extraction and purification of genomic DNA and those related to the thermal amplification process. This mini-review provides an updated literature survey that critically analyzes the following key aspects of bacterial quantification by qPCR: (i) the normalization of qPCR results by using exogenous controls, (ii) the construction of adequate calibration curves, and (iii) the determination of qPCR reaction efficiency. It is primarily focused on original papers published last year, where qPCR was applied to quantify bacterial species in different types of biological samples, including multi-species biofilms, human fluids, and water and soil samples. KEY POINTS: • qPCR is a widely used technique used for absolute bacterial quantification. • Recently published papers lack proper qPCR methodologies. • Not including proper qPCR controls significantly affect experimental conclusions.
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Affiliation(s)
- Angela Lima
- Laboratory of Research in Biofilms Rosário Oliveira (LIBRO), Centre of Biological Engineering (CEB), University of Minho, Braga, Portugal
- LABBELS -Associate Laboratory, Braga, Guimarães, Portugal
| | - Angela França
- Laboratory of Research in Biofilms Rosário Oliveira (LIBRO), Centre of Biological Engineering (CEB), University of Minho, Braga, Portugal
- LABBELS -Associate Laboratory, Braga, Guimarães, Portugal
| | - Christina A Muzny
- Division of Infectious Diseases, University of Alabama at Birmingham, Birmingham, USA
| | - Christopher M Taylor
- Department of Microbiology, Immunology, and Parasitology & Microbial Genomics Resource Group, Louisiana State University Health Sciences Center, New Orleans, USA
| | - Nuno Cerca
- Laboratory of Research in Biofilms Rosário Oliveira (LIBRO), Centre of Biological Engineering (CEB), University of Minho, Braga, Portugal.
- LABBELS -Associate Laboratory, Braga, Guimarães, Portugal.
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9
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Iron-Based Magnetic Nanosystems for Diagnostic Imaging and Drug Delivery: Towards Transformative Biomedical Applications. Pharmaceutics 2022; 14:pharmaceutics14102093. [PMID: 36297529 PMCID: PMC9607318 DOI: 10.3390/pharmaceutics14102093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/07/2022] Open
Abstract
The advancement of biomedicine in a socioeconomically sustainable manner while achieving efficient patient-care is imperative to the health and well-being of society. Magnetic systems consisting of iron based nanosized components have gained prominence among researchers in a multitude of biomedical applications. This review focuses on recent trends in the areas of diagnostic imaging and drug delivery that have benefited from iron-incorporated nanosystems, especially in cancer treatment, diagnosis and wound care applications. Discussion on imaging will emphasise on developments in MRI technology and hyperthermia based diagnosis, while advanced material synthesis and targeted, triggered transport will be the focus for drug delivery. Insights onto the challenges in transforming these technologies into day-to-day applications will also be explored with perceptions onto potential for patient-centred healthcare.
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Nanofiber Carriers of Therapeutic Load: Current Trends. Int J Mol Sci 2022; 23:ijms23158581. [PMID: 35955712 PMCID: PMC9368923 DOI: 10.3390/ijms23158581] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 12/10/2022] Open
Abstract
The fast advancement in nanotechnology has prompted the improvement of numerous methods for the creation of various nanoscale composites of which nanofibers have gotten extensive consideration. Nanofibers are polymeric/composite fibers which have a nanoscale diameter. They vary in porous structure and have an extensive area. Material choice is of crucial importance for the assembly of nanofibers and their function as efficient drug and biomedicine carriers. A broad scope of active pharmaceutical ingredients can be incorporated within the nanofibers or bound to their surface. The ability to deliver small molecular drugs such as antibiotics or anticancer medications, proteins, peptides, cells, DNA and RNAs has led to the biomedical application in disease therapy and tissue engineering. Although nanofibers have shown incredible potential for drug and biomedicine applications, there are still difficulties which should be resolved before they can be utilized in clinical practice. This review intends to give an outline of the recent advances in nanofibers, contemplating the preparation methods, the therapeutic loading and release and the various therapeutic applications.
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Do Pham DD, Mojr V, Helusová M, Mikušová G, Pohl R, Dávidová E, Šanderová H, Vítovská D, Bogdanová K, Večeřová R, Sedláková MH, Fišer R, Sudzinová P, Pospíšil J, Benada O, Křížek T, Galandáková A, Kolář M, Krásný L, Rejman D. LEGO-Lipophosphonoxins: A Novel Approach in Designing Membrane Targeting Antimicrobials. J Med Chem 2022; 65:10045-10078. [PMID: 35839126 PMCID: PMC9580004 DOI: 10.1021/acs.jmedchem.2c00684] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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The alarming rise of bacterial antibiotic resistance
requires the
development of new compounds. Such compounds, lipophosphonoxins (LPPOs),
were previously reported to be active against numerous bacterial species,
but serum albumins abolished their activity. Here we describe the
synthesis and evaluation of novel antibacterial compounds termed LEGO-LPPOs,
loosely based on LPPOs, consisting of a central linker module with
two attached connector modules on either side. The connector modules
are then decorated with polar and hydrophobic modules. We performed
an extensive structure–activity relationship study by varying
the length of the linker and hydrophobic modules. The best compounds
were active against both Gram-negative and Gram-positive species including
multiresistant strains and persisters. LEGO-LPPOs act by first depleting
the membrane potential and then creating pores in the cytoplasmic
membrane. Importantly, their efficacy is not affected by the presence
of serum albumins. Low cytotoxicity and low propensity for resistance
development demonstrate their potential for therapeutic use.
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Affiliation(s)
- Duy Dinh Do Pham
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Viktor Mojr
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Michaela Helusová
- Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 43 Prague 2, Czech Republic
| | - Gabriela Mikušová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic.,Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 43 Prague 2, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Eva Dávidová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Hana Šanderová
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Dragana Vítovská
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Kateřina Bogdanová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Renata Večeřová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Miroslava Htoutou Sedláková
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Radovan Fišer
- Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 43 Prague 2, Czech Republic
| | - Petra Sudzinová
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Jiří Pospíšil
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Oldřich Benada
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Tomáš Křížek
- Department of Analytical Chemistry, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Adéla Galandáková
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Milan Kolář
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Libor Krásný
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Dominik Rejman
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
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Electrospun polycaprolactone nanofibrous membranes loaded with baicalin for antibacterial wound dressing. Sci Rep 2022; 12:10900. [PMID: 35764658 PMCID: PMC9240071 DOI: 10.1038/s41598-022-13141-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 05/20/2022] [Indexed: 11/23/2022] Open
Abstract
Due to the rise in bacterial resistance, the antibacterial extractions from Chinese herbs have been used more frequently for wound care. In this work, baicalin, an extraction from the Chinese herb Scutellaria baicalensis, was utilized as the antibacterial component in the poly(ε-caprolactone)/MXene (PCL/Ti3C2TX) hybrid nanofibrous membranes for wound dressing. The results revealed that the presence of Ti3C2TX aided in the diameter reduction of the electrospun nanofibers. The PCL hybrid membrane containing 3 wt% Ti3C2TX nanoflakes and 5 wt% baicalin exhibited the smallest mean diameter of 210 nm. Meanwhile, the antibacterial tests demonstrated that the PCL ternary hybrid nanofibers containing Ti3C2TX and baicalin exhibited adequate antibacterial activity against the Gram-positive bacterial S. aureus due to the good synergistic effects of Ti3C2TX naoflakes and baicalin. The addition of Ti3C2TX nanoflakes and baicalin could significantly improve the hydrophilicity of the membranes, resulting in the release of baicalin from the nanofibers. In addition, the cytotoxicity of the nanofibers on rat skeletal myoblast L6 cells confirmed their good compatibility with these PCL-based nanofibrous membrances. This work offers a feasible way to prepare antibacterial nanofibrous membranes using Chinese herb extraction for wound dressing applications.
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Allafchian A, Masmouei HR, Jalali SAH. Design and characterization of Persian gum/polyvinyl alcohol electrospun nanofibrous scaffolds for cell culture applications. Int J Biol Macromol 2022; 209:1402-1409. [PMID: 35461869 DOI: 10.1016/j.ijbiomac.2022.04.139] [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: 11/28/2021] [Revised: 04/17/2022] [Accepted: 04/18/2022] [Indexed: 11/28/2022]
Abstract
Biocompatible electrospun nanofiber scaffolds were fabricated in this study using Persian gum (PG) and poly (vinyl alcohol) (PVA) to build an artificial extracellular matrix for cell growth. The preparation procedure involves mixing various ratios of PG/PVA to be electrospun and seeded with L929 fibroblasts. Upon addition of PG up to 60% to the solutions, a 30% decrease to around 240 μs·cm-1 is found in electrical conductivity which is in the range of semi-conductive polymers, whereas the surface tension is increased to around 3%. The fabricated scaffolds were characterized by morphological, chemical, thermal and structural analyses including SEM, FTIR spectroscopy, DSC, XRD, and tensile stress. The results showed that incorporation of 50% PG to the polymer solutions causes the formation of nanofibers with the least bead-shaped segments. All ratios of nanofibers containing PG showed significant biocompatibility with the cultured cells, which is presumably due to the radical scavenging feature of PG. The MTT and SEM analyses demonstrated that the scaffolds containing 50% PG possess the optimal cell compatibility, adhesion and proliferation properties. The fabricated PG/PVA cell culture scaffolds are potentially appropriate for wound dressing and cell culture applications in biomedicine.
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Affiliation(s)
- Alireza Allafchian
- Research Institute for Nanotechnology and Advanced Materials, Isfahan University of Technology, Isfahan 84156-83111, Iran; Research Institute for Biotechnology and Bioengineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Hamid Reza Masmouei
- Research Institute for Nanotechnology and Advanced Materials, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Seyed Amir Hossein Jalali
- Research Institute for Biotechnology and Bioengineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Department of Natural Resources, Isfahan University of Technology, Isfahan 84156-83111, Iran
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