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Nguyen LNT, Do XH, Pham HB, Duy-Thanh D, Than UTT, Nguyen TH, Nguyen VB, Le DS, Nguyen DT, Kieu KT, Nguyen PT, Vu MD, Tran NT, Nguyen TL, Nghiem LTH, Nguyen TD, Nguyen NTH, Hoang NTM. Different Biocompatibility and Radioprotective Activity of Squid Melanin Nanoparticles on Human Stromal Cells. ACS OMEGA 2024; 9:36926-36938. [PMID: 39246473 PMCID: PMC11375714 DOI: 10.1021/acsomega.3c09351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 08/10/2024] [Accepted: 08/13/2024] [Indexed: 09/10/2024]
Abstract
Squid ink melanin nanoparticles (NPs) have recently been demonstrated to have a number of bioactivities; however, their biocompatibility has been poorly investigated. In this study, we aimed to evaluate the effects of this NP on stromal cells, including human fibroblasts (hFBs), human umbilical vein endothelial cells (hUVECs), and human umbilical cord-derived mesenchymal stem cells (UCMSCs), and on the development of zebrafish embryos under normal X-ray irradiation conditions. The NPs showed high biocompatibility with low cytotoxicity, no cell senescence induction, and no effect on cell migration in hFBs or cell differentiation in UCMSCs. Nonetheless, this compound prevented cell movement in UCMSCs and significantly suppressed tube formation in hUVECs at a dose of 25 μg/mL. The NPs successfully penetrated the hUVECs but not the other two stromal cell types. The expression levels of functional genes involved in angiogenesis, apoptosis, antioxidant activity, and radiation sensitivity were altered in NPs subjected to hUVECs but were not affected in hFBs and UCMSCs. Melanin NPs significantly rescued cell viability and gene expression in irradiated hFBs and UCMSCs but not in hUVECs. In vivo treatments of zebrafish embryos showed that melanin NPs were nontoxic whether alone or under X-ray irradiation. These findings suggested that nanosized squid ink melanin had biocompatibility with selective stromal cells and was safe for early development.
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Affiliation(s)
- Le-Na Thi Nguyen
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
| | - Xuan-Hai Do
- Vietnam Military Medical University, Hanoi 10000, Vietnam
| | - Hanh B Pham
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
| | - Dinh Duy-Thanh
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
| | - Uyen Thi Trang Than
- Vinmec HiTech Center & Vinmec-VinUni Institute of Immunology, Vinmec Healthcare System, Hanoi 10000, Vietnam
| | - Thu-Huyen Nguyen
- VinMec-VinUni Institute of Immunology, Vinmec Healthcare System, Hanoi 10000, Vietnam
| | - Van-Ba Nguyen
- Vietnam Military Medical University, Hanoi 10000, Vietnam
| | - Duc-Son Le
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
| | - Dinh-Thang Nguyen
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
| | - Kien Trung Kieu
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
| | | | - Manh Duc Vu
- Vietnam Military Medical University, Hanoi 10000, Vietnam
| | - Nghia Trung Tran
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
| | - Thanh Lai Nguyen
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
| | - Lien T H Nghiem
- Institute of Physics, Vietnam Academy of Science and Technology, Hanoi 10000, Vietnam
| | - Toan D Nguyen
- Institute of Physics, Vietnam Academy of Science and Technology, Hanoi 10000, Vietnam
| | | | - Nhung-Thi My Hoang
- VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam
- Center of Applied Sciences, Regenerative Medicine and Advanced Technologies, Vinmec Healthcare System, Hanoi10000, Vietnam
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2
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Almeida NLM, Peralta LCF, Pontes FML, Rinaldo D, Porto VC, Lara VS. Anti-Candida activity and biocompatibility of silver nanoparticles associated with denture glaze: a new approach to the management of denture stomatitis. Folia Microbiol (Praha) 2024:10.1007/s12223-024-01161-4. [PMID: 38652435 DOI: 10.1007/s12223-024-01161-4] [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: 10/08/2023] [Accepted: 03/26/2024] [Indexed: 04/25/2024]
Abstract
The association of silver nanoparticles (AgNps) to sealant agent Palaseal® can be a promising alternative for complete denture wearers who may develop denture stomatitis (DS). The study aimed to evaluate the anti-Candida and biocompatible potential of silver nanoparticles synthesized by three routes associated with denture glaze to prevent and/or treat oral candidiasis. Surface acrylic resin specimens were treated with different associations of glaze with AgNps (VER+AgUV, VER+AgTurk and VER+AgGm). As controls, specimens were treated with glaze+nystatin (VER+Nyst), glaze only (VER) or submerged in PBS (PBS). Afterwards, Candida albicans biofilm was developed for 24 h, 15 d and 30 d. Subsequently, the biofilm was quantified by CFU/mL, XTT assay and confocal laser scanning microscopy. Fibroblasts were submitted to conditioned medium with the same associations for 24, 48 and 72 h and LIVE/DEAD® viability test was carried out. Regardless of the period, there was a significant reduction (p < 0.01) of viable fungal cells load, as well as inhibition of fungal metabolic activity, in specimens treated with glaze+AgNps associations, compared to VER and PBS. The anti-Candida effects of the associations were similar to the VER+Nyst group, with emphasis on VER+AgGm, which showed the highest percentage values of non-viable fungal cells maintained over time. The associations did not prove toxicity to fibroblasts. The AgNps exerted antimicrobial activity against C. albicans biofilms and are biocompatible. The most effective results were achieved with the association of glaze+silver nanoparticles synthesized by the green chemistry method (AgGm), proving to be an innovative alternative in the management of DS.
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Affiliation(s)
- Nara Lígia Martins Almeida
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, 17012-901, Brazil
| | - Laura Catalí Ferreira Peralta
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru 17012-901, Brazil
| | | | - Daniel Rinaldo
- Department of Chemistry, São Paulo State University (UNESP), Bauru 17033-360, Brazil
| | - Vinicius Carvalho Porto
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru 17012-901, Brazil
| | - Vanessa Soares Lara
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, 17012-901, Brazil.
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3
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Brizuela Guerra N, Morais Lima JV, Nozella NL, Boratto MH, Paulin JV, Graeff CFDO. Electrochemical Doping Effect on the Conductivity of Melanin-Inspired Materials. ACS APPLIED BIO MATERIALS 2024; 7:2186-2196. [PMID: 38466818 DOI: 10.1021/acsabm.3c01166] [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] [Indexed: 03/13/2024]
Abstract
Eumelanin is a natural pigment that can be particularly valuable for sustainable bioelectronic devices due to its inherent biocompatibility and hydration-dependent conductivity. However, the low conductivity of eumelanin limits its technological development. In this research, electrochemical doping was proposed as an alternative route to increase the electronic conductivity of synthetic eumelanin derivatives. Thin films of sulfonated eumelanin were deposited on platinum interdigitated electrodes and electrochemically treated by using cyclic voltammetry and chronoamperometry treatments. X-ray photoelectron spectroscopy analysis confirmed ion doping in sulfonated melanin. Current-voltage, current-time, and electrochemical impedance measurements were used to investigate the effect of different aqueous electrolytes (including KCl and LiClO4) treatments on the charge transport of sulfonated eumelanin. We show that the conductivity depends on the type and size of the anion used and can reach 10-3 S·cm-1. Additionally, depending on the electrolyte, there is a change in charge transport from mixed ionic/electronic to a predominantly electronic-only conduction. Our results show that the chemical nature of the ion plays an important role in the electrochemical doping and, consequently, in the charge transport of eumelanin. These insights serve as inspiration to explore the use of alternative electrolytes with different compositions further and develop eumelanin-based devices with tunable conductivities.
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Affiliation(s)
- Nayrim Brizuela Guerra
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - João Victor Morais Lima
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - Natan Luis Nozella
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - Miguel Henrique Boratto
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - João Vitor Paulin
- Department of Physics and Meteorology, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
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Beeson W, Gabriel K, Cornelison C. Fungi as a source of eumelanin: current understanding and prospects. J Ind Microbiol Biotechnol 2023; 50:kuad014. [PMID: 37336591 PMCID: PMC10569377 DOI: 10.1093/jimb/kuad014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 06/15/2023] [Indexed: 06/21/2023]
Abstract
Melanins represent a diverse collection of pigments with a variety of structures and functions. One class of melanin, eumelanin, is recognizable to most as the source of the dark black color found in cephalopod ink. Sepia officinalis is the most well-known and sought-after source of non-synthetic eumelanin, but its harvest is limited by the availability of cuttlefish, and its extraction from an animal source brings rise to ethical concerns. In recent years, these limitations have become more pressing as more applications for eumelanin are developed-particularly in medicine and electronics. This surge in interest in the applications of eumelanin has also fueled a rise in the interest of alternative, bio-catalyzed production methods. Many culinarily-utilized fungi are ideal candidates in this production scheme, as examples exist which have been shown to produce eumelanin, their growth at large scales is well understood, and they can be cultivated on recaptured waste streams. However, much of the current research on the fungal production of eumelanin focuses on pathogenic fungi and eumelanin's role in virulence. In this paper, we will review the potential for culinary fungi to produce eumelanin and provide suggestions for new research areas that would be most impactful in the search for improved fungal eumelanin producers.
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Affiliation(s)
- William Beeson
- Department of Molecular and Cellular Biology, Kennesaw State
University, 1000 Chastain Road NW, Kennesaw, GA
30144, USA
| | - Kyle Gabriel
- Department of Molecular and Cellular Biology, Kennesaw State
University, 1000 Chastain Road NW, Kennesaw, GA
30144, USA
| | - Christopher Cornelison
- Department of Molecular and Cellular Biology, Kennesaw State
University, 1000 Chastain Road NW, Kennesaw, GA
30144, USA
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Tian L, Li X, Ji H, Yu Q, Yang M, Guo L, Huang L, Gao W. Melanin-like nanoparticles: advances in surface modification and tumour photothermal therapy. J Nanobiotechnology 2022; 20:485. [PMCID: PMC9675272 DOI: 10.1186/s12951-022-01698-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 11/03/2022] [Indexed: 11/21/2022] Open
Abstract
Currently, tumor treatments are characterized by intelligence, diversity and personalization, but the therapeutic reagents used are often limited in clinical efficacy due to problems with water solubility, targeting, stability and multidrug resistance. To remedy these shortcomings, the application of multifunctional nanotechnology in the biomedical field has been widely studied. Synthetic melanin nanoparticles (MNPs) surfaces which contain highly reactive chemical groups such as carboxyl, hydroxyl and amine groups, can be used as a reaction platform on which to graft different functional components. In addition, MNPs easily adhere to substrate surface, and serve as a secondary reaction platform to modify it. The multifunctionality and intrinsic biocompatibility make melanin-like nanoparticles promising as a multifunctional and powerful nanoplatform for oncological applications. This paper first reviews the preparation methods, polymerization mechanisms and physicochemical properties of melanin including natural melanin and chemically synthesized melanin to guide scholars in MNP-based design. Then, recent advances in MNPs especially synthetic polydopamine (PDA) melanin for various medical oncological applications are systematically and thoroughly described, mainly focusing on bioimaging, photothermal therapy (PTT), and drug delivery for tumor therapy. Finally, based on the investigated literature, the current challenges and future directions for clinical translation are reasonably discussed, focusing on the innovative design of MNPs and further elucidation of pharmacokinetics. This paper is a timely and comprehensive and detailed study of the progress of MNPs in tumor therapy, especially PTT, and provides ideas for the design of personalized and customizable oncology nanomedicines to address the heterogeneity of the tumor microenvironment.
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Affiliation(s)
- Luyao Tian
- grid.33763.320000 0004 1761 2484Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300193 China
| | - Xia Li
- grid.33763.320000 0004 1761 2484Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300193 China
| | - Haixia Ji
- grid.33763.320000 0004 1761 2484Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300193 China
| | - Qing Yu
- grid.33763.320000 0004 1761 2484Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300193 China
| | - Mingjuan Yang
- grid.33763.320000 0004 1761 2484Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300193 China
| | - Lanping Guo
- grid.410318.f0000 0004 0632 3409National Resource Center for Chinese Materia Medica, Academy of Chinese Medical Sciences, Beijing, 100700 China
| | - Luqi Huang
- grid.410318.f0000 0004 0632 3409National Resource Center for Chinese Materia Medica, Academy of Chinese Medical Sciences, Beijing, 100700 China
| | - Wenyuan Gao
- grid.33763.320000 0004 1761 2484Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300193 China
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Handl J, Nyvltova P, Capek J, Cesla P, Hovsepyan A, Avetisyan S, Micankova P, Bruckova L, Stankova P, Knotkova K, Petrosyan T, Rousar T. The comparison of biological effects of bacterial and synthetic melanins in neuroblastoma cells. Food Chem Toxicol 2022; 168:113355. [PMID: 35952821 DOI: 10.1016/j.fct.2022.113355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 07/28/2022] [Accepted: 08/03/2022] [Indexed: 11/26/2022]
Abstract
Melanins belong to a group of pigments of different structure and origin. They can be produced synthetically or isolated from living organisms. A number of studies have reported testing of various melanins in neurological studies providing different outcomes. Because the structure of melanins can have an effect on obtained results in cell toxicity studies, we present here our original study which aimed to compare the biological effects of bacterial melanin (biotechnologically obtained from B. thuringiensis) with that of synthetic melanin in neuroblastoma cells. Both melanins were structurally characterized in detail. After melanin treatment (0-200 μg/mL), cell viability, glutathione levels, cell morphology and respiration were assessed in SH-SY5Y cells. The structural analysis showed that bacterial melanin is more hydrophilic according to the presence of larger number of -OH moieties. After melanin treatment, we found that synthetic melanin at similar dosage caused always larger cell impairment compared to bacterial melanin. In addition, more severe toxic effect of synthetic melanin was found in mitochondria. In general, we conclude that more hydrophilic, bacterial melanin induced lower toxicity in neuroblastoma cells in comparison to synthetic melanin. Our findings can be useable for neuroscientific studies estimating the potential use for study of neuroprotection, neuromodulation or neurotoxicity.
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Affiliation(s)
- Jiri Handl
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Pavlina Nyvltova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Jan Capek
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Petr Cesla
- Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Anichka Hovsepyan
- Scientific and Production Center "Armbiotechnology" SNPO NAS RA, 14 Gyurjyan St., Yerevan, Armenia
| | - Sona Avetisyan
- Scientific and Production Center "Armbiotechnology" SNPO NAS RA, 14 Gyurjyan St., Yerevan, Armenia
| | - Petra Micankova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Lenka Bruckova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Pavla Stankova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Katerina Knotkova
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Tigran Petrosyan
- Department of Physiology and Pathophysiology, Medical Institute, Yerevan Haybusak University, 6 Abelyan St., Yerevan, Armenia
| | - Tomas Rousar
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic.
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7
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Cuba JPB, Alves GGB, Galindo LA, Paulin JV, Batagin-Neto A. Sulfonated melanin derivatives: theoretical evaluation of local reactivities and chemical structures. J Mol Model 2021; 27:362. [PMID: 34825273 DOI: 10.1007/s00894-021-04982-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 11/12/2021] [Indexed: 10/19/2022]
Abstract
Melanins are natural macromolecules present in several organisms responsible for photoprotection, photosensitivity, ion chelation, and thermoregulation. Such materials have attracted attention due to their interesting electronic properties, which suggest their possible application in biocompatible devices. However, the low typical solubility of traditional melanins does not allow the production of good quality thin films. In this sense, soluble compounds obtained via alternative synthetic routes, for instance, via levodopa (L-DOPA) oxidation in sulfonated solvents (S-melanins), can be considered interesting technological materials. Despite this, the structural and electronic features of these compounds are not fully understood. In this context, here we present a theoretical study on the local reactivities of S-melanin building blocks to better understand possible mechanisms involved in its synthesis and propose extended structures of this material. For this purpose, condensed-to-atoms Fukui indices were evaluated in the framework of the density functional theory (DFT). The obtained results show that the different side groups present in S-melanins do not significantly influence the reactivity of the compound in relation to non-functionalized melanins, indicating that both materials can present similar macroscopic structures.
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Affiliation(s)
- João P B Cuba
- São Paulo State University (UNESP), Campus of Itapeva, Itapeva, SP, 18409-010, Brazil
| | - Gabriel G B Alves
- School of Sciences, POSMAT, São Paulo State University (UNESP), Bauru, SP, 17033-360, Brazil.
| | - Levy A Galindo
- School of Sciences, POSMAT, São Paulo State University (UNESP), Bauru, SP, 17033-360, Brazil
| | - João V Paulin
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, 13083970, Brazil
| | - Augusto Batagin-Neto
- São Paulo State University (UNESP), Campus of Itapeva, Itapeva, SP, 18409-010, Brazil.,School of Sciences, POSMAT, São Paulo State University (UNESP), Bauru, SP, 17033-360, Brazil
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8
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Abstract
Biocompatible and biodegradable powering materials are appealing systems for biomedical and electronic devices. Melanin is a natural and multifunctional material with redox capability, which is of great interest in electrochemical energy storage functionalities. In our work, we explored the use of soluble melanin derivatives as active materials for symmetric solid-state supercapacitors operating in the dark and under illumination. We observed that our devices were photo-pseudocapacitive. Additionally, under illumination, our best device showed a specific capacitance of 57.7 mFg−1 at a scan rate of 0.01 Vs−1, with a decrease of 53% in resistance compared to that in the dark. Our outcome suggests that soluble melanin is a promising material for solid-state powering elements in wearable and environmentally friendly devices.
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9
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Peng H, Zhou Y, Zhang C, Wang M, Zhao S, Xu Y, Zhang W, Xin H, Wang X. An accurate and dual-effective body slimming method through a soluble microneedle patch with variable temperature. J Mater Chem B 2021; 9:421-427. [PMID: 33367393 DOI: 10.1039/d0tb01547d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Obesity is a chronic and recurrent disease with potential risks. Traditional weight-loss methods (like exercises, surgeries, oral drugs, etc.) have shown different side effects. In this experiment, the microneedle (MN) patch was selected as the drug carrier of the weight-loss drug Rosiglitazone (Rosi). Besides, melanin was added to enhance the photo-thermal effect and accelerate the release of drugs to the target fat region under near-infrared (NIR) light. Afterwards, with exterior cold stimulation, the significant and accurate effect of body slimming could be achieved. This combination of soluble MN patches and variable temperatures provides an attractive nonsurgical method for future accurate body slimming management.
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Affiliation(s)
- Haichuan Peng
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi 330088, China.
| | - Yan Zhou
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi 330088, China.
| | - Chuxi Zhang
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi 330088, China.
| | - Manyu Wang
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi 330088, China.
| | - Siyu Zhao
- The Key Laboratory of Oral Biomedicine, The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Yingying Xu
- The Key Laboratory of Oral Biomedicine, The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Wei Zhang
- College of Chemistry, Nanchang University, Nanchang, Jiangxi 330088, China
| | - Hongbo Xin
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi 330088, China.
| | - Xiaolei Wang
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi 330088, China. and College of Chemistry, Nanchang University, Nanchang, Jiangxi 330088, China
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10
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Paulin JV, Batagin-Neto A, Meredith P, Graeff CFO, Mostert AB. Shedding Light on the Free Radical Nature of Sulfonated Melanins. J Phys Chem B 2020; 124:10365-10373. [PMID: 33153262 DOI: 10.1021/acs.jpcb.0c08097] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Melanin, an important class of natural pigment found in the human body, has stood out as a promising bioelectronic material due to its rather unique collection of electrical properties and biocompatibility. Among the available melanin derivatives, the sulfonated form has proven to not only be able to produce homogeneous device quality thin films with excellent adhesion, even on hydrophobic surfaces, but also to act as an ion to electron transducing element. It has recently been shown that the transport physics (and dominant carrier generation) may be related to a semiquinone free radical species in these materials. Hence, a better understanding of the paramagnetic properties of sulfonated derivatives could shed light on their charge transport behavior and thus enable improvement in regard to use in bioelectronics. Motivated by this question, in this work, different sulfonated melanin derivatives were investigated by hydration-controlled, continuous-wave X-band electron paramagnetic resonance spectroscopy and electronic structure calculations. Our results show that sulfonated melanin behaves similarly to non-functionalized melanin, but demonstrates a less pronounced response to humidity vis-à-vis standard melanin. We thus speculate on the structural and charge transport behavior in light of these differences with a view to further engineering structure-property relationships.
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Affiliation(s)
- J V Paulin
- School of Sciences, Postgraduate Program in Science and Technology of Materials (POSMAT), São Paulo State University (UNESP), Bauru, Brazil.,Department of Physics, Swansea University, Singleton Park, Swansea SA2 8PP, United Kingdom
| | - A Batagin-Neto
- School of Sciences, Postgraduate Program in Science and Technology of Materials (POSMAT), São Paulo State University (UNESP), Bauru, Brazil.,São Paulo State University (UNESP), Campus of Itapeva, Itapeva, Brazil
| | - P Meredith
- Department of Physics, Swansea University, Singleton Park, Swansea SA2 8PP, United Kingdom.,School of Mathematics and Physics, University of Queensland, St. Lucia Campus, Brisbane, Queensland 4072, Australia
| | - C F O Graeff
- School of Sciences, Postgraduate Program in Science and Technology of Materials (POSMAT), São Paulo State University (UNESP), Bauru, Brazil.,School of Sciences, Department of Physics, São Paulo State University (UNESP), Bauru, Brazil
| | - A B Mostert
- Department of Chemistry, Swansea University, Singleton Park, Swansea SA2 8PP, United Kingdom
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11
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Vahidzadeh E, Kalra AP, Shankar K. Melanin-based electronics: From proton conductors to photovoltaics and beyond. Biosens Bioelectron 2018; 122:127-139. [DOI: 10.1016/j.bios.2018.09.026] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/05/2018] [Accepted: 09/06/2018] [Indexed: 01/04/2023]
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12
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Paulin JV, Veiga AG, Garcia-Basabe Y, Rocco MLM, Graeff CFO. Structural and optical properties of soluble melanin analogues with enhanced photoluminescence quantum efficiency. POLYM INT 2018. [DOI: 10.1002/pi.5543] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- João Vitor Paulin
- São Paulo State University (UNESP), Post-Graduate Program in Materials Science and Technology; Bauru Brazil
| | - Amanda Garcez Veiga
- Institute of Chemistry; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - Yunier Garcia-Basabe
- Institute of Chemistry; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | | | - Carlos FO Graeff
- São Paulo State University (UNESP), Post-Graduate Program in Materials Science and Technology; Bauru Brazil
- São Paulo State University (UNESP), Department of Physics; Bauru Brazil
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13
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Ambrico M. SPECIAL ISSUE: Melanin, a long lasting history bridging natural pigments and organic bioelectronics. POLYM INT 2016. [DOI: 10.1002/pi.5239] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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