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Lee JS, Jeong JR, Lee MH, Kang K. Ultrathin and Smooth Pheomelanin-like Photoconductive Film. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38838199 DOI: 10.1021/acsami.4c03824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
This study introduces a facile method for the substrate-independent deposition of pheomelanin-like films, revealing unique and promising electrical characteristics. The conventional darkening of a dopamine solution at a basic pH was significantly delayed by the addition of l-cysteine, resulting in a distinctive temporal pattern: an initial quiescent period without apparent color change followed by an abrupt and explosive burst. Surprisingly, within the quiescent period, the deposition of ultrathin and smooth pheomelanin-like films was observed, in addition to rough and thick films formed after the burst. Regardless of thickness or texture, these films exhibited common chemical properties, including moisture-capturing capability and dark- and bright-state conductivities. Particularly noteworthy were consistent photocurrent responses under bias voltage across various pheomelanin-like films, which were not observed in polydopamine films, highlighting the influential role of l-cysteine addition. These findings present a novel avenue for the potential application of pheomelanin-like films in bioelectronics, emphasizing their distinct electrical characteristics and prompting further exploration into their intricate conductive mechanisms. The study contributes to advancing our understanding of melanin-based materials and their potential in diverse scientific and technological domains.
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Affiliation(s)
- Jeong Sun Lee
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, South Korea
| | - Jae Ryeol Jeong
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, South Korea
| | - Min Hyung Lee
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, South Korea
| | - Kyungtae Kang
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, South Korea
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2
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Xie W, Dhinojwala A, Gianneschi NC, Shawkey MD. Interactions of Melanin with Electromagnetic Radiation: From Fundamentals to Applications. Chem Rev 2024. [PMID: 38758918 DOI: 10.1021/acs.chemrev.3c00858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2024]
Abstract
Melanin, especially integumentary melanin, interacts in numerous ways with electromagnetic radiation, leading to a set of critical functions, including radiation protection, UV-protection, pigmentary and structural color productions, and thermoregulation. By harnessing these functions, melanin and melanin-like materials can be widely applied to diverse applications with extraordinary performance. Here we provide a unified overview of the melanin family (all melanin and melanin-like materials) and their interactions with the complete electromagnetic radiation spectrum (X-ray, Gamma-ray, UV, visible, near-infrared), which until now has been absent from the literature and is needed to establish a solid fundamental base to facilitate their future investigation and development. We begin by discussing the chemistries and morphologies of both natural and artificial melanin, then the fundamentals of melanin-radiation interactions, and finally the exciting new developments in high-performance melanin-based functional materials that exploit these interactions. This Review provides both a comprehensive overview and a discussion of future perspectives for each subfield of melanin that will help direct the future development of melanin from both fundamental and applied perspectives.
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Affiliation(s)
- Wanjie Xie
- Department of Biology, Evolution and Optics of Nanostructure Group, University of Ghent, Gent 9000, Belgium
| | - Ali Dhinojwala
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Nathan C Gianneschi
- Department of Chemistry, Department of Materials Science and Engineering, Department of Biomedical Engineering, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Lurie Cancer Center, and International Institute of Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Matthew D Shawkey
- Department of Biology, Evolution and Optics of Nanostructure Group, University of Ghent, Gent 9000, Belgium
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3
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Jia H, Ren J, Kong Y, Ji Z, Guo S, Li J. Recent Advances in Dopamine-Based Membrane Surface Modification and Its Membrane Distillation Applications. MEMBRANES 2024; 14:81. [PMID: 38668109 PMCID: PMC11052433 DOI: 10.3390/membranes14040081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/02/2023] [Accepted: 09/08/2023] [Indexed: 04/28/2024]
Abstract
Surface modification of membranes is essential for improving flux and resistance to contamination for membranes. This is of great significance for membrane distillation, which relies on the vapor pressure difference across the membrane as the driving force. In recent years, biomimetic mussel-inspired substances have become the research hotspots. Among them, dopamine serves as surface modifiers that would achieve highly desirable and effective membrane applications owing to their unique physicochemical properties, such as universal adhesion, enhanced hydrophilicity, tunable reducibility, and excellent thermal conductivity. The incorporation of a hydrophilic layer, along with the utilization of photothermal properties and post-functionalization capabilities in modified membranes, effectively addresses challenges such as low flux, contamination susceptibility, and temperature polarization during membrane distillation. However, to the best of our knowledge, there is still a lack of comprehensive and in-depth discussions. Therefore, this paper systematically compiles the modification method of dopamine on the membrane surface and summarizes its application and mechanism in membrane distillation for the first time. It is believed that this paper would provide a reference for dopamine-assisted membrane separation during production, and further promote its practical application.
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Affiliation(s)
| | - Jing Ren
- Shanxi Laboratory for Yellow River, Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China; (H.J.); (Y.K.); (Z.J.); (S.G.)
| | | | | | | | - Jianfeng Li
- Shanxi Laboratory for Yellow River, Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China; (H.J.); (Y.K.); (Z.J.); (S.G.)
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4
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Understanding the way eumelanin works: A unique example of properties and skills driven by molecular heterogeneity. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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5
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6
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Deng X, Yang X, Guan X, Song J, Wu S. Polydopamine nanospheres with multiple quenching effect on TiO 2/CdS:Mn for highly sensitive photoelectrochemical assay of tumor markers. Anal Bioanal Chem 2021; 413:2045-2054. [PMID: 33616685 DOI: 10.1007/s00216-020-03114-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 11/28/2020] [Accepted: 12/07/2020] [Indexed: 01/05/2023]
Abstract
A photoelectrochemical (PEC) immunosensing strategy based on the multiple quenching of polydopamine nanoparticles (PDA NPs) to Mn2+-doped CdS-modified TiO2 nanoparticles (TiO2/CdS:Mn) was designed for the highly sensitive detection of carcinoembryonic antigen (CEA). The uniform PDA NPs possessed good dispersibility, good biocompatibility, and abundant functional groups for biomolecule assembly. They also had unique photophysical properties, with light absorption spanning the visible to infrared light range. When the immune-recognition brought the PDA NPs close to the TiO2/CdS:Mn interface, the PDA NPs competed with TiO2/CdS:Mn to absorb light, consumed photoelectrons generated in the TiO2/CdS:Mn, and hindered the access of electron donors to photoactive materials. The contribution from these aspects thus led to a significant decrease in photocurrent. Benefiting from the multiple quenching mechanism, the PEC immunosensor showed high sensitivity for CEA detection. Under optimal conditions, a low detection limit of 0.02 pg/mL and a wide linear relationship from 0.1 pg/mL to 100 ng/mL were obtained. The immunoassay showed good reproducibility and stability, and good selectivity and high accuracy in serum sample analysis. In this regard, PEC immunosensors may have great application potential for screening tumor markers and the prevention and monitoring of serious diseases.
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Affiliation(s)
- Xunxun Deng
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116023, Liaoning, China
| | - Xinlan Yang
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116023, Liaoning, China
| | - Xingxing Guan
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116023, Liaoning, China
| | - Jie Song
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116023, Liaoning, China
| | - Shuo Wu
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116023, Liaoning, China.
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7
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Chen YC, Kendall T, Yip P, Davy A, Sefcik J, Sutter JU. Influence of Ions and pH on the Formation of Solid- and Liquid-like Melanin. ACS OMEGA 2020; 5:25059-25068. [PMID: 33043184 PMCID: PMC7542583 DOI: 10.1021/acsomega.0c01953] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
Melanin is a natural pigment with broadband absorption and effective ability to dissipate the energy absorbed. The macromolecular structure of melanin shows a delicate balance between short-range ordered and disordered structures without being a random aggregate. The presence of ions or the variation in pH or ionic strength can alter the self-assembly process which subsequently changes the structure of melanin. To understand these relationships, this study investigates the influence of ions and pH in melanin formation. The types of ions present and pH have a profound influence on the formation and structure of melanin particles, while only minor changes are observed in the absorption and excitation-emission analysis. In some conditions, the formation of discernible particles with significant refractive index contrast is avoided while retaining the spectroscopic characteristics of melanin, leading to liquid-like melanin. These findings identify potential pathways which can be used to manipulate the melanin macromolecular structure while providing the desired spectral properties to enable novel bio-engineering applications.
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Affiliation(s)
- Yi-chieh Chen
- Department of Chemical and Process Engineering, University of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, U.K.
| | - Thomas Kendall
- Department of Chemical and Process Engineering, University of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, U.K.
| | - Philip Yip
- Horiba IBH Ltd., 133 Finnieston Street, Glasgow G3 8HB, Scotland, U.K.
- Photophysics Group, Centre for Molecular Nanometrology, Department
of Physics, The Scottish Universities Physics Alliance, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G4 0NG, U.K.
| | - Alastair Davy
- Photophysics Group, Centre for Molecular Nanometrology, Department
of Physics, The Scottish Universities Physics Alliance, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G4 0NG, U.K.
| | - Jan Sefcik
- Department of Chemical and Process Engineering, University of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, U.K.
| | - Jens U. Sutter
- Photophysics Group, Centre for Molecular Nanometrology, Department
of Physics, The Scottish Universities Physics Alliance, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G4 0NG, U.K.
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8
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Shankar N, Guimarães AO, Napoli E, Giulivi C. Forensic determination of hair deposition time in crime scenes using electron paramagnetic resonance. J Forensic Sci 2020; 66:72-82. [PMID: 32986869 DOI: 10.1111/1556-4029.14570] [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: 06/23/2020] [Revised: 08/06/2020] [Accepted: 08/18/2020] [Indexed: 11/28/2022]
Abstract
Several types of biological samples, including hair strands, are found at crime scenes. Apart from the identification of the value and the contributor of the probative evidence, it is important to prove that the time of shedding of hair belonging to a suspect or victim matches the crime window. To this end, to estimate the ex vivo aging of hair, we evaluated time-dependent changes in melanin-derived free radicals in blond, brown, and black hairs by using electron paramagnetic resonance spectroscopy (EPR). Hair strands aged under controlled conditions (humidity 40%, temperature 20-22°C, indirect light, with 12/12 hour of light/darkness cycles) showed a time-dependent decay of melanin-derived radicals. The half-life of eumelanin-derived radicals in hair under our experimental settings was estimated at 22 ± 2 days whereas that of pheomelanin was about 2 days suggesting better stabilization of unpaired electrons by eumelanin. Taken together, this study provides a reference for future forensic studies on determination of degradation of shed hair in a crime scene by following eumelanin radicals by utilizing the non-invasive, non-destructive, and highly specific EPR technique.
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Affiliation(s)
- Nikhita Shankar
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, USA
| | - André O Guimarães
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, USA.,Laboratório de Ciências Físicas, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ, Brazil
| | - Eleonora Napoli
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, USA
| | - Cecilia Giulivi
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, USA.,MIND Institute, University of California Davis Medical Center, Sacramento, CA, USA
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9
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Hauser D, Septiadi D, Turner J, Petri-Fink A, Rothen-Rutishauser B. From Bioinspired Glue to Medicine: Polydopamine as a Biomedical Material. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E1730. [PMID: 32272786 PMCID: PMC7178714 DOI: 10.3390/ma13071730] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 12/13/2022]
Abstract
Biological structures have emerged through millennia of evolution, and nature has fine-tuned the material properties in order to optimise the structure-function relationship. Following this paradigm, polydopamine (PDA), which was found to be crucial for the adhesion of mussels to wet surfaces, was hence initially introduced as a coating substance to increase the chemical reactivity and surface adhesion properties. Structurally, polydopamine is very similar to melanin, which is a pigment of human skin responsible for the protection of underlying skin layers by efficiently absorbing light with potentially harmful wavelengths. Recent findings have shown the subsequent release of the energy (in the form of heat) upon light excitation, presenting it as an ideal candidate for photothermal applications. Thus, polydopamine can both be used to (i) coat nanoparticle surfaces and to (ii) form capsules and ultra-small (nano)particles/nanocomposites while retaining bulk characteristics (i.e., biocompatibility, stability under UV irradiation, heat conversion, and activity during photoacoustic imaging). Due to the aforementioned properties, polydopamine-based materials have since been tested in adhesive and in energy-related as well as in a range of medical applications such as for tumour ablation, imaging, and drug delivery. In this review, we focus upon how different forms of the material can be synthesised and the use of polydopamine in biological and biomedical applications.
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Affiliation(s)
- Daniel Hauser
- Division of Surgery & Interventional Science, Royal Free Hospital, University College London, London NW3 2PS, UK;
- Adolphe Merkle Institute, University of Fribourg, 1700 Fribourg, Switzerland; (D.S.); (A.P.-F.)
| | - Dedy Septiadi
- Adolphe Merkle Institute, University of Fribourg, 1700 Fribourg, Switzerland; (D.S.); (A.P.-F.)
| | - Joel Turner
- Division of Surgery & Interventional Science, Royal Free Hospital, University College London, London NW3 2PS, UK;
| | - Alke Petri-Fink
- Adolphe Merkle Institute, University of Fribourg, 1700 Fribourg, Switzerland; (D.S.); (A.P.-F.)
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10
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Park H, Yang I, Choi M, Jang KS, Jung JC, Choi KY. Engineering of melanin biopolymer by co-expression of MelC tyrosinase with CYP102G4 monooxygenase: Structural composition understanding by 15 tesla FT-ICR MS analysis. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Hu J, Yang L, Yang P, Jiang S, Liu X, Li Y. Polydopamine free radical scavengers. Biomater Sci 2020; 8:4940-4950. [DOI: 10.1039/d0bm01070g] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This feature article summarizes the recent progress, challenges and future directions of free radical scavengers based on polydopamine, including the integrated mechanism, current regulating strategies, and kinds of biomedical applications.
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Affiliation(s)
- Junfei Hu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Lei Yang
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Peng Yang
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Shaohua Jiang
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources
- College of Materials Science and Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xianhu Liu
- National Engineering Research Center for Advanced Polymer Processing Technology
- Zhengzhou University
- Zhengzhou 450002
- China
| | - Yiwen Li
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
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12
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Sun CK, Liu WM, Liao YH. Study on melanin enhanced third harmonic generation in a live cell model. BIOMEDICAL OPTICS EXPRESS 2019; 10:5716-5723. [PMID: 31799042 PMCID: PMC6865104 DOI: 10.1364/boe.10.005716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/20/2019] [Accepted: 10/04/2019] [Indexed: 05/08/2023]
Abstract
Melanin dominates the endogenous contrasts of in vivo third harmonic generation (THG) imaging of human skin. A recent study investigated the THG in melanin solution and a linear relationship between melanin concentration and THG intensity was reported, in contrast to the expected nonlinear relationship. Since melanin hydrocolloid solution is very different from the skin tissue, here we report our study on the origin of the melanin-enhanced THG by using a live cell model. Different from the previous conclusion, our live cell study has indicated an initial nonlinear process where the THG intensity was enhanced according to the 3.5th power of melanin mass density (MMD). When the MMD is higher than 11 mg/ml, a transition from the resonance-enhanced THG to the high-order hyper-Rayleigh scattering process occurs. This saturation phenomenon of the virtual-transition-based THG nonlinear process is attributed to the multi-melanosome-induced scattering within the sub-femtoliter focal volume.
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Affiliation(s)
- Chi-Kuang Sun
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Min Liu
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Hua Liao
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei 10002, Taiwan
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13
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Vitiello G, Pezzella A, Zanfardino A, Varcamonti M, Silvestri B, Costantini A, Branda F, Luciani G. Titania as a driving agent for DHICA polymerization: a novel strategy for the design of bioinspired antimicrobial nanomaterials. J Mater Chem B 2015; 3:2808-2815. [DOI: 10.1039/c5tb00039d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organic materials are widely employed to tune surface chemistry and/or as structuring agents of inorganic materials.
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Affiliation(s)
- Giuseppe Vitiello
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
| | - Alessandro Pezzella
- Dipartimento di Scienze Chimiche
- Università di Napoli “Federico II” via Cintia 4
- 80126 Napoli
- Italy
| | - Anna Zanfardino
- Dipartimento di Biologia
- Università di Napoli “Federico II” via Cintia 4
- 80126 Napoli
- Italy
| | - Mario Varcamonti
- Dipartimento di Biologia
- Università di Napoli “Federico II” via Cintia 4
- 80126 Napoli
- Italy
| | - Brigida Silvestri
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
| | - Aniello Costantini
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
| | - Francesco Branda
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
| | - Giuseppina Luciani
- Dipartimento di Ingegneria Chimica
- dei Materiali e della Produzione Industriale
- Università di Napoli “Federico II”
- 80125 Napoli
- Italy
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14
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Corani A, Huijser A, Gustavsson T, Markovitsi D, Malmqvist PÅ, Pezzella A, d’Ischia M, Sundström V. Superior Photoprotective Motifs and Mechanisms in Eumelanins Uncovered. J Am Chem Soc 2014; 136:11626-35. [DOI: 10.1021/ja501499q] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Alice Corani
- Department
of Chemical Physics, Lund University, Box 124, 22100 Lund, Sweden
| | - Annemarie Huijser
- Department
of Chemical Physics, Lund University, Box 124, 22100 Lund, Sweden
| | - Thomas Gustavsson
- CNRS, IRAMIS,
LIDYL, Laboratoire Francis Perrin, URA 2453, F-91191 Gif-sur-Yvette, France
| | - Dimitra Markovitsi
- CNRS, IRAMIS,
LIDYL, Laboratoire Francis Perrin, URA 2453, F-91191 Gif-sur-Yvette, France
| | - Per-Åke Malmqvist
- Division
of Theoretical Chemistry, Lund University, Box 124, 22100 Lund, Sweden
| | - Alessandro Pezzella
- Department
of Chemistry Sciences, University of Naples Federico II Via Cintia, 80126 Naples, Italy
| | - Marco d’Ischia
- Department
of Chemistry Sciences, University of Naples Federico II Via Cintia, 80126 Naples, Italy
| | - Villy Sundström
- Department
of Chemical Physics, Lund University, Box 124, 22100 Lund, Sweden
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15
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Liu Y, Ai K, Lu L. Polydopamine and Its Derivative Materials: Synthesis and Promising Applications in Energy, Environmental, and Biomedical Fields. Chem Rev 2014; 114:5057-115. [DOI: 10.1021/cr400407a] [Citation(s) in RCA: 3219] [Impact Index Per Article: 321.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yanlan Liu
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
- Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Kelong Ai
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Lehui Lu
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
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16
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Galván I, Jorge A, Solano F, Wakamatsu K. Vibrational characterization of pheomelanin and trichochrome F by Raman spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 110:55-59. [PMID: 23563634 DOI: 10.1016/j.saa.2013.03.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 02/21/2013] [Accepted: 03/03/2013] [Indexed: 06/02/2023]
Abstract
We characterize for the first time the vibrational state of natural pheomelanin using Raman spectroscopy and model pigment synthesized from 5-S-cysteinyldopa. The shape of the Raman spectrum was very different from that of eumelanin. Four Raman bands were visible in the 500-2000 cm(-1) wavenumber region about 500, 1150, 1490 and 2000 cm(-1), which we assigned to the out-of-plane deformation and the stretching vibration of the phenyl rings, to the stretching vibration of C-N bonds or the stretching and wagging vibration of CH2, and to overtone or combination bands. Interestingly, we also show that the Raman spectrum of synthetic trichochrome F, a pigment that may be produced along with pheomelanin during pheomelanogenesis, is different from that of pheomelanin and similar to the spectrum of eumelanin. We could detect Raman signal of both eumelanin and pheomelanin in feathers and hairs where both pigments simultaneously occur without the need of isolating the pigment. This indicates that Raman spectroscopy represents a non-invasive method to detect pheomelanin and distinguish it from other pigments. This may be especially relevant to detect pheomelanin in animal skin including humans, where it has been associated with animal appearance and classification, human phototypes, prevention of skin diseases and cancer risk.
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Affiliation(s)
- Ismael Galván
- Laboratoire d'Ecologie, Systématique et Evolution, CNRS UMR 8079, Université Paris-Sud 11, Bâtiment 362, F-91405 Orsay Cedex, France.
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17
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Phua SL, Yang L, Toh CL, Guoqiang D, Lau SK, Dasari A, Lu X. Simultaneous enhancements of UV resistance and mechanical properties of polypropylene by incorporation of dopamine-modified clay. ACS APPLIED MATERIALS & INTERFACES 2013; 5:1302-1309. [PMID: 23360646 DOI: 10.1021/am3024405] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Inspired by the radical scavenging function of melanin-like materials and versatile adhesive ability of mussel-adhesion proteins, dopamine-modified clay (D-clay) was successfully incorporated into polypropylene (PP) using an amine-terminated PP oligomer as the compatibilizer. Although the PP/D-clay nanocomposites exhibit intercalated morphology, the incorporation of D-clay greatly improves the thermo-oxidative stability and UV resistance of PP owing to the strong radical scavenging ability of polydopamine (PDA) and large contact area between PP and the PDA coating on clay mineral. Moreover, the reinforcement effect brought by D-clay is fairly significant at very low clay loadings probably owing to the strong interfacial interactions between the layered silicates and the compatibilizer as well as that between the compatibilizer and the PP matrix. The work demonstrates that D-clay is a type of promising nanofiller for thermoplastics used for outdoor applications since it stabilizes and reinforces the polymers simultaneously.
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Affiliation(s)
- Si Lei Phua
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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18
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Suzukawa AA, Vieira A, Winnischofer SMB, Scalfo AC, Di Mascio P, Ferreira AMDC, Ravanat JL, Martins DDL, Rocha MEM, Martinez GR. Novel properties of melanins include promotion of DNA strand breaks, impairment of repair, and reduced ability to damage DNA after quenching of singlet oxygen. Free Radic Biol Med 2012; 52:1945-53. [PMID: 22401857 DOI: 10.1016/j.freeradbiomed.2012.02.039] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 02/17/2012] [Accepted: 02/24/2012] [Indexed: 01/22/2023]
Abstract
Melanins have been associated with the development of melanoma and its resistance to photodynamic therapy (PDT). Singlet molecular oxygen ((1)O(2)), which is produced by ultraviolet A solar radiation and the PDT system, is also involved. Here, we investigated the effects that these factors have on DNA damage and repair. Our results show that both types of melanin (eumelanin and pheomelanin) lead to DNA breakage in the absence of light irradiation and that eumelanin is more harmful than pheomelanin. Interestingly, melanins were found to bind to the minor grooves of DNA, guaranteeing close proximity to DNA and potentially causing the observed high levels of strand breaks. We also show that the interaction of melanins with DNA can impair the access of repair enzymes to lesions, contributing to the perpetuation of DNA damage. Moreover, we found that after melanins interact with (1)O(2), they exhibit a lower ability to induce DNA breakage; we propose that these effects are due to modifications of their structure. Together, our data highlight the different modes of action of the two types of melanin. Our results may have profound implications for cellular redox homeostasis, under conditions of induced melanin synthesis and irradiation with solar light. These results may also be applied to the development of protocols to sensitize melanoma cells to PDT.
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Affiliation(s)
- Andréia Akemi Suzukawa
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, 81.531-980 Curitiba, PR, Brazil
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19
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Probing near-infrared photorelaxation pathways in eumelanins and pheomelanins. J Phys Chem A 2011; 114:11483-91. [PMID: 20882951 DOI: 10.1021/jp103608d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ultraviolet-visible spectroscopy readily discerns the two types of melanin pigments (eumelanin and pheomelanin), although fundamental details regarding the optical properties and pigment heterogeneity are more difficult to disentangle via analysis of the broad featureless absorption spectrum alone. We employed nonlinear transient absorption spectroscopy to study different melanin pigments at near-infrared wavelengths. Excited-state absorption, ground-state depletion, and stimulated emission signal contributions were distinguished for natural and synthetic eumelanins and pheomelanins. A starker contrast among the pigments is observed in the nonlinear excitation regime because they all exhibit distinct transient absorptive amplitudes, phase shifts, and nonexponential population dynamics spanning the femtosecond-nanosecond range. In this manner, different pigments within the pheomelanin subclass were distinguished in synthetic and human hair samples. These results highlight the potential of nonlinear spectroscopies to deliver an in situ analysis of natural melanins in tissue that are otherwise difficult to extract and purify.
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Selective and Sensitive Determination of Pheomelanin in Biological Samples Using MEKC with Laser-Induced Fluorescence Detection Based on Intramolecular Excimer-Forming Fluorescence Derivatization. Chromatographia 2011. [DOI: 10.1007/s10337-010-1841-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Huijser A, Pezzella A, Sundström V. Functionality of epidermal melanin pigments: current knowledge on UV-dissipative mechanisms and research perspectives. Phys Chem Chem Phys 2011; 13:9119-27. [DOI: 10.1039/c1cp20131j] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Greco G, Wakamatsu K, Panzella L, Ito S, Napolitano A, d’Ischia M. Isomeric cysteinyldopas provide a (photo)degradable bulk component and a robust structural element in red human hair pheomelanin. Pigment Cell Melanoma Res 2009; 22:319-27. [DOI: 10.1111/j.1755-148x.2009.00561.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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23
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Simon JD, Hong L, Peles DN. Insights into melanosomes and melanin from some interesting spatial and temporal properties. J Phys Chem B 2008; 112:13201-17. [PMID: 18817437 DOI: 10.1021/jp804248h] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Melanosomes are organelles found in a wide variety of tissues throughout the animal kingdom and exhibit a range of different shapes: spheres of up to approximately 1 mum diameters and ellipsoids with lengths of up to approximately 2 mum and varying aspect ratios. The functions of melanosomes include photoprotection, mitigation of the effects of reactive oxygen species, and metal chelation. The melanosome contains a variety of biological molecules, e.g., proteins and lipids, but the dominant constituent is the pigment melanin, and the functions ascribed to melanosomes are uniquely enabled by the chemical properties of the melanins they contain. In the past decade, there has been significant progress in understanding melanins and their impact on human health. While the molecular details of melanin production and how the pigment is organized within the melanosome determine its properties and biological functions, the physical and chemical properties of the surface of the melanosome are central to their range of ascribed functions. Surprisingly, few studies designed to probe this biological surface have been reported. In this article, we discuss recent work using surface-sensitive analytic, spectroscopic, and imaging techniques to examine the structural and chemical properties of many types of natural pigments: sepia melanin granules, human and bovine ocular melanosomes, human hair melanosomes, and neuromelanin. N 2 adsorption/desorption measurements and atomic force microscopy provide novel insights into surface morphology. The chemical properties of the melanins present on the surface are revealed by X-ray photoelectron spectroscopy and photoemission electron microscopy. These technologies are also applied to elucidate changes in surface properties that occur with aging. Specifically, studies of the surface properties of human retinal pigment epithelium melanosomes as a function of age are stimulating the development of models for their age-dependent behaviors. The article concludes with a brief discussion of important unanswered research questions in this field.
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Affiliation(s)
- John D Simon
- Department of Chemistry, Duke UNiversity, Durham, NC, USA
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24
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Calvo AC, Pey AL, Ying M, Loer CM, Martinez A. Anabolic function of phenylalanine hydroxylase in Caenorhabditis elegans. FASEB J 2008; 22:3046-58. [PMID: 18460651 DOI: 10.1096/fj.08-108522] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In humans, liver phenylalanine hydroxylase (PAH) has an established catabolic function, and mutations in PAH cause phenylketonuria, a genetic disease characterized by neurological damage, if not treated. To obtain novel evolutionary insights and information on molecular mechanisms operating in phenylketonuria, we investigated PAH in the nematode Caenorhabditis elegans (cePAH), where the enzyme is coded by the pah-1 gene, expressed in the hypodermis. CePAH presents similar molecular and kinetic properties to human PAH [S(0.5)(L-Phe) approximately 150 microM; K(m) for tetrahydrobiopterin (BH(4)) approximately 35 microM and comparable V(max)], but cePAH is devoid of positive cooperativity for L-Phe, an important regulatory mechanism of mammalian PAH that protects the nervous system from excess L-Phe. Pah-1 knockout worms show no obvious neurological defects, but in combination with a second cuticle synthesis mutation, they display serious cuticle abnormalities. We found that pah-1 knockouts lack a yellow-orange pigment in the cuticle, identified as melanin by spectroscopic techniques, and which is detected in C. elegans for the first time. Pah-1 mutants show stimulation of superoxide dismutase activity, suggesting that cuticle melanin functions as oxygen radical scavenger. Our results uncover both an important anabolic function of PAH and the change in regulation of the enzyme along evolution.
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Affiliation(s)
- Ana C Calvo
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway
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25
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Wang A, Marino AR, Gasyna Z, Gasyna E, Norris J. Photoprotection by porcine eumelanin against singlet oxygen production. Photochem Photobiol 2008; 84:679-82. [PMID: 18422874 DOI: 10.1111/j.1751-1097.2008.00353.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Melanin, a major pigment found in retinal pigment epithelium (RPE) cells, is considered to function in dual roles, one protective and one destructive. By quenching free radical species and reactive oxygen species (ROS) melanin counteracts harmful redox stress. However, melanin is also thought to be capable of creating ROS. In this destructive role, melanin increases redox strain in the cell. This study uses readily available eumelanin extracted from porcine RPE cells as a more authentic model than synthetic melanin to determine specific mechanisms of melanin activity with regard to singlet oxygen in the presence and absence of rose bengal, a singlet-oxygen photosensitizer. Optical detection of singlet-oxygen was determined by monitoring the bleaching of p-nitrosodimethylaniline in the presence of histidine. Production of singlet oxygen in aqueous oxygen-saturated solutions of rose bengal without eumelanin was readily accomplished. In contrast, detection of singlet oxygen in oxygen-saturated solutions of eumelanin without rose bengal failed, consistent with results of others. However, a significant decrease in singlet oxygen production by rose bengal was observed in the presence of eumelanin. After correction for light absorption and chemical bleaching of eumelanin, the results show that eumelanin also provides a photoprotective mode arising from chemistry, that is, not just the physical process of light absorption followed by energy dissipation as heat.
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Affiliation(s)
- Alice Wang
- Department of Chemistry, University of Chicago, Chicago, IL, USA.
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Zonios G, Dimou A, Bassukas I, Galaris D, Tsolakidis A, Kaxiras E. Melanin absorption spectroscopy: new method for noninvasive skin investigation and melanoma detection. JOURNAL OF BIOMEDICAL OPTICS 2008; 13:014017. [PMID: 18315375 DOI: 10.1117/1.2844710] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We present a new method for studying melanin in vivo based on diffuse reflectance spectroscopy of human skin. We find that the optical absorption spectrum of in vivo melanin exhibits an exponential dependence on wavelength, consistent with, but with a higher decay slope than, in vitro results. We offer theoretical justification for this exponential dependence on the basis of a recently proposed model for the structure of eumelanin protomolecules. Moreover, we report on a new method for analysis of diffuse reflectance spectra, which identifies intrinsic differences in absorption spectra between malignant melanoma and dysplastic nevi in vivo. These preliminary results are confirmed both by analysis of our own clinical data as well as by analysis of data from three independent, previously published studies. In particular, we find evidence that the histologic transition from dysplastic nevi to melanoma in situ and then to malignant melanoma is reflected in the melanin absorption spectra. Our results are very promising for the development of techniques for the noninvasive detection of melanoma and, more generally, for the study and characterization of pigmented skin lesions. It is also a promising approach for a better understanding of the biological role, structure, and function of melanin.
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Affiliation(s)
- George Zonios
- University of Ioannina, Department of Materials Science and Engineering, 45110 Ioannina, Greece.
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27
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Abstract
In this article, we review the current state of knowledge concerning the physical and chemical properties of the eumelanin pigment. We examine properties related to its photoprotective functionality, and draw the crucial link between fundamental molecular structure and observable macroscopic behaviour. Where necessary, we also briefly review certain aspects of the pheomelanin literature to draw relevant comparison. A full understanding of melanin function, and indeed its role in retarding or promoting the disease state, can only be obtained through a full mapping of key structure-property relationships in the main pigment types. We are engaged in such an endeavor for the case of eumelanin.
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Affiliation(s)
- Paul Meredith
- Soft Condensed Matter Physics Group, School of Physical Sciences, University of Queensland, Brisbane, Australia
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