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Liu S, Liu X, Zhang X, Su Y, Chen X, Cai S, Liao D, Pan N, Su J, Chen X, Xiao M, Liu Z. Exploring the Potential of Water-Soluble Squid Ink Melanin: Stability, Free Radical Scavenging, and Cd 2+ Adsorption Abilities. Foods 2023; 12:3963. [PMID: 37959093 PMCID: PMC10648800 DOI: 10.3390/foods12213963] [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: 09/27/2023] [Revised: 10/23/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023] Open
Abstract
Squid ink melanin can be efficiently extracted from the byproduct ink sac generated during squid processing. As a natural food colorant, it possesses inherent antioxidant properties and the capability to adsorb heavy metals. This study aims to investigate the solubility of water-soluble squid ink melanin (WSSM) obtained from the ink sac, as well as its stability under various conditions including temperature, pH, salt, sugar, potassium sorbate, metal ions, sodium benzoate, sodium sulfite (reducing agent), and hydrogen peroxide (oxidizing agent). Moreover, it explores the scavenging effects of WSSM on free radicals and cadmium ions. The findings suggest that WSSM's stability is insignificantly affected by high temperature, sucrose, and salt. However, acidity, sodium benzoate, potassium sorbate, sodium sulfite (Na2SO3), and hydrogen peroxide (H2O2) significantly influence its stability. Most metal ions do not impact the stability of WSSM, except for Fe2+, Fe3+, Al3+, and Cu2+, which result in the precipitation of WSSM. Additionally, WSSM exhibits remarkable antioxidant activity with IC50 values of 0.91, 0.56, and 0.52 mg/mL for scavenging superoxide anion radicals (O2-·), hydroxyl radicals (·OH), and DPPH radicals, respectively. It also demonstrates the ability to adsorb the heavy metal Cd2+, with the adsorption rate gradually increasing with a higher temperature and larger amounts of WSSM added. Infrared spectroscopy analysis reveals the weakening of characteristic peaks (-COOH and -OH) during the process of Cd2+ adsorption by WSSM, while SEM confirms surface roughening and structural damage after Cd2+ adsorption. This study provides valuable insights for the utilization of squid melanin products as natural antioxidants and heavy metal adsorbents in the food industry.
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Affiliation(s)
- Shuji Liu
- Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing (Xiamen), Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; (S.L.); (Y.S.); (S.C.); (D.L.); (N.P.); (J.S.); (X.C.)
| | - Xianwei Liu
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China; (X.L.); (X.Z.)
| | - Xueqin Zhang
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China; (X.L.); (X.Z.)
| | - Yongchang Su
- Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing (Xiamen), Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; (S.L.); (Y.S.); (S.C.); (D.L.); (N.P.); (J.S.); (X.C.)
| | - Xiao’e Chen
- College of Food and Pharmacy, Zhejiang Ocean University, Joint Key Laboratory of Aquatic Products Processing Technology of Zhejiang Province, Zhoushan 316022, China;
| | - Shuilin Cai
- Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing (Xiamen), Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; (S.L.); (Y.S.); (S.C.); (D.L.); (N.P.); (J.S.); (X.C.)
| | - Dengyuan Liao
- Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing (Xiamen), Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; (S.L.); (Y.S.); (S.C.); (D.L.); (N.P.); (J.S.); (X.C.)
| | - Nan Pan
- Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing (Xiamen), Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; (S.L.); (Y.S.); (S.C.); (D.L.); (N.P.); (J.S.); (X.C.)
| | - Jie Su
- Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing (Xiamen), Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; (S.L.); (Y.S.); (S.C.); (D.L.); (N.P.); (J.S.); (X.C.)
| | - Xiaoting Chen
- Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing (Xiamen), Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; (S.L.); (Y.S.); (S.C.); (D.L.); (N.P.); (J.S.); (X.C.)
| | - Meitian Xiao
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China; (X.L.); (X.Z.)
| | - Zhiyu Liu
- Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing (Xiamen), Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; (S.L.); (Y.S.); (S.C.); (D.L.); (N.P.); (J.S.); (X.C.)
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Melanins from the Lichens Lobaria pulmonaria and Lobaria retigera as Eco-Friendly Adsorbents of Synthetic Dyes. Int J Mol Sci 2022; 23:ijms232415605. [PMID: 36555244 PMCID: PMC9779828 DOI: 10.3390/ijms232415605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/22/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022] Open
Abstract
Synthetic dyes are widely used in the industry; they are chemically stable, difficult to neutralize, and therefore they are a threat to the environment when released into wastewaters. The dyes have a significant impact on plant performance by impairing photosynthesis, inhibiting growth, and entering the food chain and may finally result in the toxicity, mutagenicity and carcinogenicity of food products. Implementation of the dark piment melanin for the adsorption of the synthetic dyes is a new ecologically friendly approach for bioremediation. The aim of the present work was to study the physico-chemical characteristics of melanins from the lichens Lobaria pulmonaria and Lobaria retigera, analyze their adsorption/desorption capacities towards synthetic dyes, and assess the capacity of melanins to mitigate toxicity of the dyes for a common soil bacterium Bacillus subtilis. Unique chelating properties of melanins determine the perspectives of the use of these high molecular weight polymers for detoxification of xenobiotics.
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Khouqeer G, Alghrably M, Madkhali N, Dhahri M, Jaremko M, Emwas A. Preparation and characterization of natural melanin and its nanocomposite formed by copper doping. NANO SELECT 2022. [DOI: 10.1002/nano.202200095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Ghada Khouqeer
- Department of Physics College of Science Imam Mohammad Ibn Saud Islamic University (IMSIU) Riyadh Saudi Arabia
| | - Mawadda Alghrably
- Division of Biological and Environmental Sciences and Engineering (BESE) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia
| | - Nawal Madkhali
- Department of Physics College of Science Imam Mohammad Ibn Saud Islamic University (IMSIU) Riyadh Saudi Arabia
| | - Manel Dhahri
- Biology Department, Faculty of Science Yanbu Taibah University Yanbu El Bahr Saudi Arabia
| | - Mariusz Jaremko
- Smart‐Health Initiative (SHI) and Red Sea Research Center (RSRC), Division of Biological and Environmental Sciences and Engineering (BESE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
| | - Abdul‐Hamid Emwas
- Core Labs King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia
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Martín J, Recio P, Rodríguez-Ruiz G, Barja I, Gutiérrez E, García LV. Relationships between soil pollution by heavy metals and melanin-dependent coloration of a fossorial amphisbaenian reptile. Integr Zool 2021; 17:596-607. [PMID: 34047065 DOI: 10.1111/1749-4877.12562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Melanin is the basis of coloration in many animals, and although it is often used in communication, thermoregulation, or camouflage, melanin has many other physiological functions. For example, in polluted habitats, melanin can have a detoxifying function. Melanic coloration would help to sequester in the skin the heavy metal contaminants from inside the body, which will be expelled to the exterior when the skin is sloughed. Moreover, animals should have evolved more melanic colorations in more polluted habitats ("industrial melanism" hypothesis). We examined whether the fossorial amphisbaenian reptile, Trogonophis wiegmanni, is able to eliminate heavy metals, derived from soil pollution by seagull depositions, through sloughing its skin. Our results suggest a covariation between levels of soil pollution by heavy metals and the concentration of heavy metals in the sloughed skins of amphisbaenians. This suggests that amphisbaenians may expel heavy metals from their bodies when they slough the skins. We also tested whether amphisbaenians inhabiting soils with higher levels of heavy metal pollution had darker (melanin-dependent) body colorations. However, contrary to predictions from the "industrial melanization" hypothesis, we found a negative relationship between soil pollution and proportions of melanic coloration. This contradictory result could, however, be explained because heavy metals have endocrine disruption effects that increase physiological stress, and higher stress levels could result in decreased melanogenesis. We suggest that although amphisbaenians might have some detoxifying mechanism linked to melanin in the skin, this process might be negatively affected by stress and result ineffective under conditions of high soil pollution.
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Affiliation(s)
- José Martín
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
| | - Pablo Recio
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
| | - Gonzalo Rodríguez-Ruiz
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
| | - Isabel Barja
- Departamento de Zoología, Facultad de Biología, Universidad Autónoma de Madrid, Madrid, Spain.,Centro de Investigación en Biodiversidad y Cambio Global (CIBC-UAM), Universidad Autónoma de Madrid, Madrid, Spain
| | - Eduardo Gutiérrez
- Departamento de Biogeoquímica, Ecología Vegetal y Microbiana, Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Sevilla, Spain
| | - Luis V García
- Departamento de Biogeoquímica, Ecología Vegetal y Microbiana, Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Sevilla, Spain
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The doping effect of Fe, Cu and Zn ions on the structural and electrochemical properties and the thermostability of natural melanin extracted from Nigella sativa L. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Urbanization alters the relationship between coloration and territorial aggression, but not hormones, in song sparrows. Anim Behav 2018. [DOI: 10.1016/j.anbehav.2018.06.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Affiliation(s)
- Julian M Menter
- Department of Microbiology, Biochemistry, and Immunology Morehouse School of Medicine 720 Westview Drive SW Atlanta GA 30310 USA
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Chatelain M, Gasparini J, Frantz A. Do trace metals select for darker birds in urban areas? An experimental exposure to lead and zinc. GLOBAL CHANGE BIOLOGY 2016; 22:2380-2391. [PMID: 27282322 DOI: 10.1111/gcb.13170] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 10/15/2015] [Indexed: 06/06/2023]
Abstract
Trace metals from anthropogenic activities are involved in numerous health impairments and may therefore select for detoxification mechanisms or a higher tolerance. Melanin, responsible for the black and red colourations of teguments, plays a role in metal ion chelation and its synthesis is positively linked to immunity, antioxidant capacity and stress resistance due to pleiotropic effects. Therefore, we expected darker birds to (1) store higher amounts of metals in their feathers, (2) maintain lower metal concentrations in blood and (3) suffer less from metal exposure. We exposed feral pigeons (Columba livia) exhibiting various plumage darkness levels to low, but chronic, concentrations of zinc and/or lead, two of the most abundant metals in urban areas. First, we found negative and positive effects of lead and zinc, respectively, on birds' condition and reproductive parameters. Then, we observed positive relationships between plumage darkness and both zinc and lead concentrations in feathers. Interestingly, though darker adults did not maintain lower metal concentrations in blood and did not have higher fitness parameters, darker juveniles exhibited a higher survival rate than paler ones when exposed to lead. Our results show that melanin-based plumage colouration does modulate lead effects on birds' fitness parameters but that the relationship between metals, melanin, and fitness is more complex than expected and thus stress the need for more studies.
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Affiliation(s)
- Marion Chatelain
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, Paris 7, CNRS, INRA, IRD, Institut d'Ecologie et des Sciences de l'Environnement de Paris, F-75005, Paris, France
| | - Julien Gasparini
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, Paris 7, CNRS, INRA, IRD, Institut d'Ecologie et des Sciences de l'Environnement de Paris, F-75005, Paris, France
| | - Adrien Frantz
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, Paris 7, CNRS, INRA, IRD, Institut d'Ecologie et des Sciences de l'Environnement de Paris, F-75005, Paris, France
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Chatelain M, Gasparini J, Frantz A. Trace metals, melanin-based pigmentation and their interaction influence immune parameters in feral pigeons (Columba livia). ECOTOXICOLOGY (LONDON, ENGLAND) 2016; 25:521-529. [PMID: 26809976 DOI: 10.1007/s10646-016-1610-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/13/2016] [Indexed: 06/05/2023]
Abstract
Understanding the effects of trace metals emitted by anthropogenic activities on wildlife is of great concern in urban ecology; yet, information on how they affect individuals, populations, communities and ecosystems remains scarce. In particular, trace metals may impact survival by altering the immune system response to parasites. Plumage melanin is assumed to influence the effects of trace metals on immunity owing to its ability to bind metal ions in feathers and its synthesis being coded by a pleiotropic gene. We thus hypothesized that trace metal exposure would interact with plumage colouration in shaping immune response. We experimentally investigated the interactive effect between exposure to an environmentally relevant range of zinc and/or lead and melanin-based plumage colouration on components of the immune system in feral pigeons (Columba livia). We found that zinc increased anti-keyhole limpet hemocyanin (KLH) IgY primary response maintenance, buffered the negative effect of lead on anti-KLH IgY secondary response maintenance and tended to increase T-cell mediated phytohaemagglutinin (PHA) skin response. Lead decreased the peak of the anti-KLH IgY secondary response. In addition, pheomelanic pigeons exhibited a higher secondary anti-KLH IgY response than did eumelanic ones. Finally, T-cell mediated PHA skin response decreased with increasing plumage eumelanin level of birds exposed to lead. Neither treatments nor plumage colouration correlated with endoparasite intensity. Overall, our study points out the effects of trace metals on some parameters of birds' immunity, independently from other confounding urbanization factors, and underlines the need to investigate their impacts on other life history traits and their consequences in the ecology and evolution of host-parasite interactions.
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Affiliation(s)
- M Chatelain
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, Paris 7, CNRS, INRA, IRD, Institut d'Ecologie et des Sciences de l'Environnement de Paris, 75005, Paris, France.
| | - J Gasparini
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, Paris 7, CNRS, INRA, IRD, Institut d'Ecologie et des Sciences de l'Environnement de Paris, 75005, Paris, France
| | - A Frantz
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, Paris 7, CNRS, INRA, IRD, Institut d'Ecologie et des Sciences de l'Environnement de Paris, 75005, Paris, France
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Yao ZY, Qi JH, Hu Y, Wang Y. Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water. Molecules 2016; 21:405. [PMID: 27043502 PMCID: PMC6273980 DOI: 10.3390/molecules21040405] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/04/2016] [Accepted: 03/22/2016] [Indexed: 11/16/2022] Open
Abstract
Chestnut shell pigment (CSP) is melanin from an agricultural waste. It has potential as an adsorbent for wastewater treatment but cannot be used in its original state because of its solubility in water. We developed a new method to convert CSP to insolubilized chestnut shell pigment (ICSP) by heating, and the Cu(II) adsorption performance of ICSP was evaluated. The conversion was characterized, and the thermal treatment caused dehydration and loss of carboxyl groups and aliphatic structures in CSP. The kinetic adsorption behavior obeyed the pseudo-second-order rate law, and the equilibrium adsorption data were well described with both the Langmuir and the Freundlich isotherms. ICSP can be used as a renewable, readily-available, easily-producible, environmentally-friendly, inexpensive and effective adsorbent to remove heavy-metal from aquatic environments.
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Affiliation(s)
- Zeng-Yu Yao
- Key Laboratory for Forest Resources Conservation and Use in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China.
| | - Jian-Hua Qi
- Key Laboratory for Forest Resources Conservation and Use in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China.
| | - Yong Hu
- Key Laboratory for Forest Resources Conservation and Use in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China.
| | - Ying Wang
- Faculty of Science, Southwest Forestry University, Kunming 650224, China.
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Manzanares JA, Rimpelä AK, Urtti A. Interpretation of Ocular Melanin Drug Binding Assays. Alternatives to the Model of Multiple Classes of Independent Sites. Mol Pharm 2016; 13:1251-7. [DOI: 10.1021/acs.molpharmaceut.5b00783] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- José A. Manzanares
- Department
of Thermodynamics, Faculty of Physics, University of Valencia, E-46100 Burjassot, Spain
| | - Anna-Kaisa Rimpelä
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, 00014 Helsinki, Finland
| | - Arto Urtti
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, 00014 Helsinki, Finland
- School
of Pharmacy, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
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12
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Rimpelä AK, Schmitt M, Latonen S, Hagström M, Antopolsky M, Manzanares JA, Kidron H, Urtti A. Drug Distribution to Retinal Pigment Epithelium: Studies on Melanin Binding, Cellular Kinetics, and Single Photon Emission Computed Tomography/Computed Tomography Imaging. Mol Pharm 2016; 13:2977-86. [DOI: 10.1021/acs.molpharmaceut.5b00787] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Anna-Kaisa Rimpelä
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - Mechthild Schmitt
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - Satu Latonen
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - Marja Hagström
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - Maxim Antopolsky
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - José A. Manzanares
- Department
of Thermodynamics, Faculty of Physics, University of Valencia, E-46100 Burjassot, Spain
| | - Heidi Kidron
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - Arto Urtti
- Centre
for Drug Research, Division of Pharmaceutical Biosciences, Faculty
of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
- School
of Pharmacy, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland
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Schroeder R, Pendleton P, Gerber J. Physical factors affecting chloroquine binding to melanin. Colloids Surf B Biointerfaces 2015; 134:8-16. [DOI: 10.1016/j.colsurfb.2015.06.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 02/02/2023]
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Dos Santos MBP, Leal KZ, Oliveira FJS, Sella SM, Vieira MD, Marques EMD, Gomes VAC. Efficient removal of mercury from aqueous solutions and industrial effluent. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2015; 50:1230-1240. [PMID: 26301849 DOI: 10.1080/10934529.2015.1055147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The objective of this study was to examine the ability of a solid waste produced during beneficiation of ornamental rocks to remove mercury (Hg) from an industrial effluent and aqueous solutions under various conditions. Batch studies have been carried out by observing the effects of pH, concentration of the adsorbate, contact time, and so on. Various sorption isotherm models such as Langmuir, Freundlich, and Tóth have been applied for the adsorbent. Film and intraparticle diffusion were both found to be rate-limiting steps. Adsorption was properly described by the Freundlich model (capacity constant of 0.3090 (mg g(-1))(mg L(-1))(-1/n) and adsorption intensity indicator of 2.2939), which indicated a favorable sorption and encouraged subsequent studies for treatment of Hg-containing industrial effluent. Industrial effluent treatment efficiency reached Hg removals greater than 90% by using ornamental rock solid waste (ORSW). Besides, desorption studies indicated that the maximum recovery of mercury was 100 ± 2% for 1 mol L(-1) HNO3 and 74 ± 8% for 0.1 mol L(-1) HNO3. The ORSW could be reused thrice without significant difference on the Hg removal rate from industrial effluent. These findings place ORSW as a promising efficient and low-cost adsorbent for the removal of Hg from aqueous solutions and industrial effluent.
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Affiliation(s)
- Maria B P Dos Santos
- a Institute of Chemistry, Federal Fluminense University, Campus of Valonguinho , Niterói, Rio de Janeiro , Brazil
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Chloroquine and hydroxychloroquine binding to melanin: Some possible consequences for pathologies. Toxicol Rep 2014; 1:963-968. [PMID: 28962308 PMCID: PMC5598414 DOI: 10.1016/j.toxrep.2014.10.019] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/25/2014] [Accepted: 10/27/2014] [Indexed: 11/23/2022] Open
Abstract
For many years chloroquine was used as a prophylactic agent against malaria, and more recently as a mild immunosuppressive. However, due to lengthy treatment periods, adverse effects have become apparent, which included retinopathy. The structurally related hydroxychloroquine is less toxic, thought to be owing to a lower tissue accumulation in melanin rich areas. This study primarily focused on quantifying melanin binding between chloroquine and hydroxychloroquine at physiological pH to investigate the potential link between binding and reported toxicity. In addition, for the first time this study quantified the actual extent of adsorption of chloroquine and hydroxychloroquine to melanin and examined the desorption profile of both drugs from melanin to demonstrate the affinity between the pigment and the solutes. The results suggest that there is a difference between the adsorption affinities of chloroquine and hydroxychloroquine, potentially explaining the differences in bioaccumulation in retinal tissue. In addition, both solutes displayed a strong physical attraction to the absorbent.
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Chatelain M, Gasparini J, Jacquin L, Frantz A. The adaptive function of melanin-based plumage coloration to trace metals. Biol Lett 2014; 10:20140164. [PMID: 24671830 DOI: 10.1098/rsbl.2014.0164] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Trace metals produced by anthropogenic activities are of major importance in urban areas and might constitute a new evolutionary force selecting for the ability to cope with their deleterious effects. Interestingly, melanin pigments are known to bind metal ions, thereby potentially sequestering them in inert body parts such as coat and feathers, and facilitating body detoxification. Thus, a more melanic plumage or coat coloration could bring a selective advantage for animals living in polluted areas. We tested this hypothesis by investigating the link between melanin-based coloration and zinc and lead concentrations in feathers of urban feral pigeons, both at capture time and after one year of captivity in standardized conditions. Results show that differently coloured pigeons had similar metal concentrations at capture time. Metal concentrations strongly decreased after one year in standardized conditions, and more melanic pigeons had higher concentrations of zinc (but not lead) in their feathers. This suggests that more melanic pigeons have a higher ability to store some metals in their feathers compared with their paler counterparts, which could explain their higher success in urbanized areas. Overall, this work suggests that trace metal pollution may exert new selective forces favouring more melanic phenotypes in polluted environments.
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Affiliation(s)
- M Chatelain
- UPMC Univ Paris 06, Institut d'Ecologie et des Sciences de l'Environnement, , Paris, France
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Iakovleva E, Sillanpää M. The use of low-cost adsorbents for wastewater purification in mining industries. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:7878-7899. [PMID: 23436121 DOI: 10.1007/s11356-013-1546-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 02/03/2013] [Indexed: 06/01/2023]
Abstract
Recently, great attention has been paid to the environmental problems in mining industry. At present there are different ways of mineral processing, as well as various methods of wastewater treatment, most of them are expensive. Work is ongoing to find low-cost treatments. In this article, low-cost adsorbents, potentially useful for wastewater treatment on mining and metallurgical plants, are reviewed; their characteristics, advantages, and disadvantages of their application are compared. Also adsorption of different metals and radioactive compounds from acidic environment similar to composition of mining and metallurgical wastewaters is considered.
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Affiliation(s)
- Evgenia Iakovleva
- Laboratory of Green Chemistry, Department of Energy and Environmental Technology, The Faculty of Technology, Lappeenranta University of Technology, Sammonkatu 12, 50130, Mikkeli, Finland,
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Melanin-based coatings as lead-binding agents. Bioinorg Chem Appl 2012; 2012:361803. [PMID: 22611345 PMCID: PMC3350951 DOI: 10.1155/2012/361803] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2011] [Revised: 01/23/2012] [Accepted: 02/07/2012] [Indexed: 11/26/2022] Open
Abstract
Interactions between metal ions and different forms of melanin play significant roles in melanin biochemistry. The binding properties of natural melanin and related synthetic materials can be exploited for nonbiological applications, potentially including water purification. A method for investigating metal ion-melanin interactions on solid support is described, with lead as the initial target. 2.5 cm discs of the hydrophobic polymer PVDF were coated with synthetic eumelanin from the tyrosinase-catalyzed polymerization of L-dopa, and with melanin extracted from human hair. Lead (Pb2+) binding was quantified by atomic absorption spectroscopy (flame mode), and the data was well fit by the Langmuir model. Langmuir affinities ranged from 3.4 · 103 to 2.2 · 104 M−1. At the maximum capacity observed, the synthetic eumelanin coating bound ~9% of its mass in lead. Binding of copper (Cu2+), zinc (Zn2+), and cadmium (Cd2+) to the synthetic-eumelanin-coated discs was also investigated. Under the conditions tested, the Langmuir affinities for Zn2+, Cd2+, and Cu2+ were 35%, 53%, and 77%, respectively, of the Langmuir affinity for Pb2+. The synthetic-eumelanin-coated discs have a slightly higher capacity for Cu2+ on a per mole basis than for Pb2+, and lower capacities for Cd2+ and Zn2+. The system described can be used to address biological questions and potentially be applied toward melanin-based water purification.
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Bridelli MG, Crippa PR. Infrared and Water Sorption Studies of the Hydration Structure and Mechanism in Natural and Synthetic Melanin. J Phys Chem B 2010; 114:9381-90. [DOI: 10.1021/jp101833k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria Grazia Bridelli
- Department of Physics and CNISM, University of Parma, Viale G. P. Usberti 7/A, I43124 Parma, Italy
| | - Pier Raimondo Crippa
- Department of Physics and CNISM, University of Parma, Viale G. P. Usberti 7/A, I43124 Parma, Italy
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