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Xiang C, Wang Z, Zhang Q, Guo Z, Li X, Chen W, Wei X, Li P. Tough physically crosslinked poly(vinyl alcohol)-based hydrogels loaded with collagen type I to promote bone regeneration in vitro and in vivo. Int J Biol Macromol 2024; 261:129847. [PMID: 38296142 DOI: 10.1016/j.ijbiomac.2024.129847] [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: 09/19/2023] [Revised: 01/26/2024] [Accepted: 01/28/2024] [Indexed: 03/09/2024]
Abstract
Poly(vinyl alcohol) (PVA) hydrogels exhibit great potential as ideal biomaterials for tissue engineering, owing to their non-toxicity, high water content, and strong biocompatibility. However, limited mechanical strength and low bioactivity have constrained their application in bone tissue engineering. In this study, we have developed a tough PVA-based hydrogel using a facile physical crosslinking method, comprising of PVA, tannic acid (TA), and hydroxyapatite (HA). Systematic experiments were conducted to examine the physicochemical properties of PVA/HA/TA hydrogels, including their compositions, microstructures, and mechanical and rheological properties. The results demonstrated that the PVA/HA/TA hydrogels possessed the porous microstructures and excellent mechanical properties. Furthermore, collagen type I (ColI) was used to further improve the biocompatibility and bioactivity of PVA/HA/TA hydrogels. In vitro experiments revealed that PVA/HA/TA/COL hydrogel could offer a suitable microenvironment for the growth of MC3T3-E1 cells and promote their osteogenic differentiation. Meanwhile, the PVA/HA/TA/COL hydrogel demonstrated the ability to promote bone regeneration and osteointegration in a rat femoral defect model. This study provides a potential strategy for the use of PVA-based hydrogels in bone tissue engineering.
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Affiliation(s)
- Changxin Xiang
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, China
| | - Zehua Wang
- Shanxi Key Laboratory of Bone and Soft Tissue Injury Repair, Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Qing Zhang
- Department of Cardiology, The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Zijian Guo
- Shanxi Key Laboratory of Bone and Soft Tissue Injury Repair, Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Xiaona Li
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, China.
| | - Weiyi Chen
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, China.
| | - Xiaochun Wei
- Shanxi Key Laboratory of Bone and Soft Tissue Injury Repair, Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, China.
| | - Pengcui Li
- Shanxi Key Laboratory of Bone and Soft Tissue Injury Repair, Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan, China
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2
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Choudhury A, Ramakrishnan R, Ghosh D. Structure prediction from spectra amidst dynamical heterogeneity in melanin. Chem Commun (Camb) 2024; 60:2613-2616. [PMID: 38265468 DOI: 10.1039/d3cc06137j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Melanin is a biopolymer pigment that plays a central role in skin photoprotection. Its extensive chemical and dynamical heterogeneity imparts this property through a broad featureless ultraviolet/visible absorption spectrum. Conventionally, the rational design of synthetic photoprotective pigments revolves around establishing the structure-spectra correlation and developing biomimetic materials with desired optical properties. This approach fails to explain the mechanistic details of melanin's absorption spectrum because it arises from an ensemble of structures rather than a local minimum on the potential energy surface. Here, we propose an inverse design approach to elucidate the contributions of dominant chromophoric units in various wavelength domains of the melanin spectrum.
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Affiliation(s)
- Arpan Choudhury
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India.
| | | | - Debashree Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India.
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3
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Du Y, Cai M, Mu J, Li X, Song Y, Yuan X, Hua X, Guo S. Type I Collagen-Adhesive and ROS-Scavenging Nanoreactors Enhanced Retinal Ganglion Cell Survival in an Experimental Optic Nerve Crush Model. Macromol Rapid Commun 2023; 44:e2300389. [PMID: 37661804 DOI: 10.1002/marc.202300389] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/30/2023] [Indexed: 09/05/2023]
Abstract
Traumatic optic neuropathy (TON) is a severe condition characterized by retinal ganglion cell (RGC) death, often leading to irreversible vision loss, and the death of RGCs is closely associated with oxidative stress. Unfortunately, effective treatment options for TON are lacking. To address this, catalase (CAT) is encapsulated in a tannic acid (TA)/poly(ethylenimine)-crosslinked hollow nanoreactor (CAT@PTP), which exhibited enhanced anchoring in the retina due to TA-collagen adhesion. The antioxidative activity of both CAT and TA synergistically eliminated reactive oxygen species (ROS) to save RGCs in the retina, thereby treating TON. In vitro experiments demonstrated that the nanoreactors preserve the enzymatic activity of CAT and exhibit high adhesion to type I collagen. The combination of CAT and TA-based nanoreactors enhanced ROS elimination while maintaining high biocompatibility. In an optic nerve crush rat model, CAT@PTP is effectively anchored to the retina via TA-collagen adhesion after a single vitreous injection, and RGCs are significantly preserved without adverse events. CAT@PTP exhibited a protective effect on retinal function. Given the abundance of collagen that exists in ocular tissues, these findings may contribute to the further application of this multifunctional nanoreactor in ocular diseases to improve therapeutic efficacy and reduce adverse effects.
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Affiliation(s)
- Yuyuan Du
- Key Laboratory of Functional Polymer Materials of Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Maoyu Cai
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, 300020, China
- Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin Eye Hospital, Tianjin, 300020, China
| | - Jingqing Mu
- Aier Eye Institute, Changsha, 410015, China
- Tianjin Aier Eye Hospital, Tianjin, 300190, China
| | - Xingwei Li
- Key Laboratory of Functional Polymer Materials of Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yapeng Song
- Key Laboratory of Functional Polymer Materials of Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xiaoyong Yuan
- Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, 300020, China
- Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin Eye Hospital, Tianjin, 300020, China
| | - Xia Hua
- Aier Eye Institute, Changsha, 410015, China
- Tianjin Aier Eye Hospital, Tianjin, 300190, China
| | - Shutao Guo
- Key Laboratory of Functional Polymer Materials of Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin, 300071, China
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4
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Therapeutic Effect of Seawater Pearl Powder on UV-Induced Photoaging in Mouse Skin. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:9516427. [PMID: 34925534 PMCID: PMC8677389 DOI: 10.1155/2021/9516427] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 08/19/2021] [Accepted: 11/03/2021] [Indexed: 11/29/2022]
Abstract
The objective of this study was to investigate the therapeutic effect of seawater pearl powder (SPP) on ultraviolet (UV) irradiation-induced photoaging in mouse skin. The protein and trace elements in SPP were detected by liquid chromatography-mass spectrometry, atomic fluorescence spectrometry, and inductively coupled plasma-atomic emission spectrometry. The effect of SPP on treating skin damage resulting from UV-induced photoaging was observed by gross physical appearance and histopathological analysis. Oxidative stress and melanin synthesis were analyzed using biochemical method. Western blotting was applied to analyze the phosphorylation and expression levels of matrix metalloproteinase-1 (MMP-1), collagen I, and proteins involved in the mitogen-activated protein kinase (MAPK) signaling pathways (p38, ERK, and JNK). The results show that SPP has a significant therapeutic effect on UV-induced photoaging of skin and improves and restores appearance and tissue structure of mouse skin. The major mechanism may be related to reduction of expression level of MMP-1 and enhancement of collagen I production via inhibition of MAPK signaling pathway after scavenging of excess reactive oxygen species (ROS) in the UV-induced photoaged skin of mice. Meanwhile, it may also be involved in reducing melanin content by inhibiting tyrosinase activity after scavenging excess ROS in the UV-induced photoaged skin of mice. Therefore, SPP could be a good substance to treat photoaging skin. Taking cost-effectiveness and efficacy into consideration, the optimal concentration of SPP for treating photoaging skin could be 100 mg/g.
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Ghosh D. Computational aspects towards understanding the photoprocesses in eumelanin. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2020. [DOI: 10.1002/wcms.1505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Debashree Ghosh
- School of Chemical Sciences Indian Association for the Cultivation of Science Kolkata India
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Choudhury A, Ghosh D. Charge transfer in DHICA eumelanin-like oligomers: role of hydrogen bonds. Chem Commun (Camb) 2020; 56:10481-10484. [DOI: 10.1039/d0cc04702c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The building blocks of eumelanin can be used as versatile material with enhanced charge transfer properties.
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Affiliation(s)
- Arpan Choudhury
- School of Chemical Science
- Indian Association for the Cultivation of Science
- Jadavpur
- India
| | - Debashree Ghosh
- School of Chemical Science
- Indian Association for the Cultivation of Science
- Jadavpur
- India
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7
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Crane SW, Ghafur O, Cowie TY, Lindsay AG, Thompson JOF, Greenwood JB, Bebbington MWP, Townsend D. Dynamics of electronically excited states in the eumelanin building block 5,6-dihydroxyindole. Phys Chem Chem Phys 2019; 21:8152-8160. [PMID: 30933211 DOI: 10.1039/c9cp00620f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first excited state dynamics study of gas-phase 5,6-dihydroxyindole (5,6-DHI), a key building block of eumelanin pigments that are found throughout nature and serve as important photo-protective compounds. Time-resolved ion-yield measurements over the 241-296 nm ultraviolet photoexcitation region revealed non-adiabatic processes occurring on up to three distinct timescales. These reflect ultrafast (i.e. sub-picosecond) internal conversion within the excited state singlet manifold, and much longer-lived processes ranging from 10 ps to in excess of 1 ns. Our investigation paves the way for precisely targeted future studies of 5,6-DHI that exploit more differential measurement techniques. The work was facilitated by the use of soft laser-based thermal desorption to introduce 5,6-DHI samples into the gas phase. This approach, based on low-cost, readily available diode lasers, is straightforward, easily controllable and potentially applicable to a wide range of non-volatile molecular species.
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Affiliation(s)
- Stuart W Crane
- Institute of Photonics & Quantum Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
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8
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Datar A, Hazra A. Pathways for Excited-State Nonradiative Decay of 5,6-Dihydroxyindole, a Building Block of Eumelanin. J Phys Chem A 2017; 121:2790-2797. [DOI: 10.1021/acs.jpca.7b01110] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Avdhoot Datar
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India
| | - Anirban Hazra
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India
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9
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Structure Characterization and Lead Detoxification Effect of Carboxymethylated Melanin Derived from Lachnum Sp. Appl Biochem Biotechnol 2017; 182:669-686. [DOI: 10.1007/s12010-016-2353-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Accepted: 11/28/2016] [Indexed: 10/20/2022]
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10
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Solano F. Photoprotectionversusphotodamage: updating an old but still unsolved controversy about melanin. POLYM INT 2016. [DOI: 10.1002/pi.5117] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- F Solano
- Department of Biochemistry and Molecular Biology B and Research Group for Molecular Control of Cell Proliferation, School of Medicine and IMIB; University of Murcia; 30100 Murcia Spain
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11
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Tuna D, Udvarhelyi A, Sobolewski AL, Domcke W, Domratcheva T. Onset of the Electronic Absorption Spectra of Isolated and π-Stacked Oligomers of 5,6-Dihydroxyindole: An Ab Initio Study of the Building Blocks of Eumelanin. J Phys Chem B 2016; 120:3493-502. [PMID: 27005558 DOI: 10.1021/acs.jpcb.6b01793] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Eumelanin is a naturally occurring skin pigment which is responsible for developing a suntan. The complex structure of eumelanin consists of π-stacked oligomers of various indole derivatives, such as the monomeric building block 5,6-dihydroxyindole (DHI). In this work, we present an ab initio wave-function study of the absorption behavior of DHI oligomers and of doubly and triply π-stacked species of these oligomers. We have simulated the onset of the electronic absorption spectra by employing the MP2 and the linear-response CC2 methods. Our results demonstrate the effect of an increasing degree of oligomerization of DHI and of an increasing degree of π-stacking of DHI oligomers on the onset of the absorption spectra and on the degree of red-shift toward the visible region of the spectrum. We find that π-stacking of DHI and its oligomers substantially red-shifts the onset of the absorption spectra. Our results also suggest that the optical properties of biological eumelanin cannot be simulated by considering the DHI building blocks alone, but instead the building blocks indole-semiquinone and indole-quinone have to be considered as well. This study contributes to advancing the understanding of the complex photophysics of the eumelanin biopolymer.
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Affiliation(s)
- Deniz Tuna
- Department of Chemistry, Technische Universität München , 85747 Garching, Germany
| | - Anikó Udvarhelyi
- Department of Biomolecular Mechanisms, Max-Planck-Institut für Medizinische Forschung , 69120 Heidelberg, Germany
| | | | - Wolfgang Domcke
- Department of Chemistry, Technische Universität München , 85747 Garching, Germany
| | - Tatiana Domratcheva
- Department of Biomolecular Mechanisms, Max-Planck-Institut für Medizinische Forschung , 69120 Heidelberg, Germany
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12
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Dai M, Huang T, Chao L, Tan Y, Chen C, Meng W, Xie Q. Tyrosinase-catalyzed polymerization of l-DOPA (versusl-tyrosine and dopamine) to generate melanin-like biomaterials for immobilization of enzymes and amperometric biosensing. RSC Adv 2016. [DOI: 10.1039/c5ra27478h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The tyrosinase-catalyzed polymerization of l-DOPA (versusl-tyrosine and dopamine) is recommended as an excellent system to immobilize enzymes for amperometric biosensing of catechol and glucose.
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Affiliation(s)
- Mengzhen Dai
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- National & Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
| | - Ting Huang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- National & Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
| | - Long Chao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- National & Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
| | - Yueming Tan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- National & Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
| | - Chao Chen
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- National & Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
| | - Wenhua Meng
- Hunan Normal University Hospital
- Changsha 410081
- China
| | - Qingji Xie
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- National & Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
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