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Laisney J, Chevallet M, Fauquant C, Sageot C, Moreau Y, Predoi D, Herlin-Boime N, Lebrun C, Michaud-Soret I. Ligand-Promoted Surface Solubilization of TiO 2 Nanoparticles by the Enterobactin Siderophore in Biological Medium. Biomolecules 2022; 12:1516. [PMID: 36291725 PMCID: PMC9599204 DOI: 10.3390/biom12101516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/03/2022] [Accepted: 10/10/2022] [Indexed: 03/08/2024] Open
Abstract
Titanium dioxide nanoparticles (TiO2-NPs) are increasingly used in consumer products for their particular properties. Even though TiO2 is considered chemically stable and insoluble, studying their behavior in biological environments is of great importance to figure their potential dissolution and transformation. The interaction between TiO2-NPs with different sizes and crystallographic forms (anatase and rutile) and the strong chelating enterobactin (ent) siderophore was investigated to look at a possible dissolution. For the first time, direct evidence of anatase TiO2-NP surface dissolution or solubilization (i.e., the removal of Ti atoms located at the surface) in a biological medium by this siderophore was shown and the progressive formation of a hexacoordinated titanium-enterobactin (Ti-ent) complex observed. This complex was characterized by UV-visible and Fourier transform infrared (FTIR) spectroscopy (both supported by Density Functional Theory calculations) as well as electrospray ionization mass spectrometry (ESI-MS) and X-ray photoelectron spectroscopy (XPS). A maximum of ca. 6.3% of Ti surface atoms were found to be solubilized after 24 h of incubation, releasing Ti-ent complexes in the micromolar range that could then be taken up by bacteria in an iron-depleted medium. From a health and environmental point of view, the effects associated to the solubilization of the E171 TiO2 food additive in the presence of enterobactin and the entrance of the Ti-enterobactin complex in bacteria were questioned.
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Affiliation(s)
- Jérôme Laisney
- Université Grenoble Alpes, CNRS CEA, IRIG-LCBM, 38000 Grenoble, France
| | | | - Caroline Fauquant
- Université Grenoble Alpes, CNRS CEA, IRIG-LCBM, 38000 Grenoble, France
| | - Camille Sageot
- Université Grenoble Alpes, CNRS CEA, IRIG-LCBM, 38000 Grenoble, France
| | - Yohann Moreau
- Université Grenoble Alpes, CNRS CEA, IRIG-LCBM, 38000 Grenoble, France
| | - Daniela Predoi
- National Institute of Materials Physics, Atomistilor 105 bis, 077125 Magurele, Romania
| | | | - Colette Lebrun
- Université Grenoble Alpes, IRIG-SyMMES, CEA, CNRS, CEA-Grenoble, 38000 Grenoble, France
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Paredes A, Loh BM, Peduzzi OM, Reig AJ, Buettner KM. DNA Cleavage by a De Novo Designed Protein-Titanium Complex. Inorg Chem 2020; 59:11248-11252. [PMID: 32799485 DOI: 10.1021/acs.inorgchem.0c01707] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Titanium is one of the most abundant elements on Earth but is commonly thought to have no role in biology because of its propensity to hydrolyze. Nature stabilizes hard Lewis acidic metals from hydrolysis using a variety of mechanisms, providing inspiration for how titanium can be stabilized using biological ligands. The well-characterized Due Ferri single-chain (DFsc) de novo designed protein was developed to bind and stabilize iron and provides a binding site with hard Lewis basic residues able to bind two metal ions. We demonstrate that the DFsc scaffold stably binds 2 equiv of titanium and protects them from unwanted hydrolysis. The Ti4+-DFsc protein complex was tested for its ability to hydrolytically cleave DNA, where it was seen to linearize plasmid DNA in an overnight reaction. Ti4+-DFsc is thus the first example of a functional, soluble titanium-protein complex.
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Affiliation(s)
- Alexander Paredes
- Department of Chemistry, Gettysburg College, Gettysburg, Pennsylvania 17325, United States
| | - Brittany M Loh
- Department of Chemistry, Gettysburg College, Gettysburg, Pennsylvania 17325, United States
| | - Olivia M Peduzzi
- Department of Chemistry, Gettysburg College, Gettysburg, Pennsylvania 17325, United States
| | - Amanda J Reig
- Department of Chemistry, Ursinus College, Collegeville, Pennsylvania 19426, United States
| | - Katherine M Buettner
- Department of Chemistry, Gettysburg College, Gettysburg, Pennsylvania 17325, United States
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Saxena M, Loza-Rosas SA, Gaur K, Sharma S, Pérez Otero SC, Tinoco AD. Exploring titanium(IV) chemical proximity to iron(III) to elucidate a function for Ti(IV) in the human body. Coord Chem Rev 2018; 363:109-125. [PMID: 30270932 PMCID: PMC6159949 DOI: 10.1016/j.ccr.2018.03.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Despite its natural abundance and widespread use as food, paint additive, and in bone implants, no specific biological function of titanium is known in the human body. High concentrations of Ti(IV) could result in cellular toxicity, however, the absence of Ti toxicity in the blood of patients with titanium bone implants indicates the presence of one or more biological mechanisms to mitigate toxicity. Similar to Fe(III), Ti(IV) in blood binds to the iron transport protein serum transferrin (sTf), which gives credence to the possibility of its cellular uptake mechanism by transferrin-directed endocytosis. However, once inside the cell, how sTf bound Ti(IV) is released into the cytoplasm, utilized, or stored remain largely unknown. To explain the molecular mechanisms involved in Ti use in cells we have drawn parallels with those for Fe(III). Based on its chemical similarities with Fe(III), we compare the biological coordination chemistry of Fe(III) and Ti(IV) and hypothesize that Ti(IV) can bind to similar intracellular biomolecules. The comparable ligand affinity profiles suggest that at high Ti(IV) concentrations, Ti(IV) could compete with Fe(III) to bind to biomolecules and would inhibit Fe bioavailability. At the typical Ti concentrations in the body, Ti might exist as a labile pool of Ti(IV) in cells, similar to Fe. Ti could exhibit different types of properties that would determine its cellular functions. We predict some of these functions to mimic those of Fe in the cell and others to be specific to Ti. Bone and cellular speciation and localization studies hint toward various intracellular targets of Ti like phosphoproteins, DNA, ribonucleotide reductase, and ferritin. However, to decipher the exact mechanisms of how Ti might mediate these roles, development of innovative and more sensitive methods are required to track this difficult to trace metal in vivo.
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Affiliation(s)
- Manoj Saxena
- Department of Chemistry, University of Puerto Rico Río Piedras, San Juan, PR 00931
| | - Sergio A. Loza-Rosas
- Department of Chemistry, University of Puerto Rico Río Piedras, San Juan, PR 00931
| | - Kavita Gaur
- Department of Chemistry, University of Puerto Rico Río Piedras, San Juan, PR 00931
| | - Shweta Sharma
- Department of Environmental Sciences, University of Puerto Rico Río Piedras, San Juan, PR 00931
| | - Sofia C. Pérez Otero
- Department of Chemistry, University of Puerto Rico Río Piedras, San Juan, PR 00931
| | - Arthur D. Tinoco
- Department of Chemistry, University of Puerto Rico Río Piedras, San Juan, PR 00931
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Loza-Rosas SA, Saxena M, Delgado Y, Gaur K, Pandrala M, Tinoco AD. A ubiquitous metal, difficult to track: towards an understanding of the regulation of titanium(iv) in humans. Metallomics 2017; 9:346-356. [PMID: 28164202 PMCID: PMC5397357 DOI: 10.1039/c6mt00223d] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Despite the ubiquitous nature of titanium(iv) and several examples of its beneficial behavior in different organisms, the metal remains underappreciated in biology. There is little understanding of how the metal might play an important function in the human body. Nonetheless, a new insight is obtained regarding the molecular mechanisms that regulate the blood speciation of the metal to maintain it in a nontoxic and potentially bioavailable form for use in the body. This review surveys the literature on Ti(iv) application in prosthetics and in the development of anticancer therapeutics to gain an insight into soluble Ti(iv) influx in the body and its long-term impact. The limitation in analytical tools makes it difficult to depict the full picture of how Ti(iv) is transported and distributed throughout the body. An improved understanding of Ti function and its interaction with biomolecules will be helpful in developing future technologies for its imaging in the body.
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Affiliation(s)
- Sergio A Loza-Rosas
- Department of Chemistry, University of Puerto Rico, Rio Piedras, San Juan, PR 00969, USA.
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Lyu S, Wei X, Chen J, Wang C, Wang X, Pan D. Titanium as a Beneficial Element for Crop Production. FRONTIERS IN PLANT SCIENCE 2017; 8:597. [PMID: 0 PMCID: PMC5404504 DOI: 10.3389/fpls.2017.00597] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Accepted: 04/03/2017] [Indexed: 05/04/2023]
Abstract
Titanium (Ti) is considered a beneficial element for plant growth. Ti applied via roots or leaves at low concentrations has been documented to improve crop performance through stimulating the activity of certain enzymes, enhancing chlorophyll content and photosynthesis, promoting nutrient uptake, strengthening stress tolerance, and improving crop yield and quality. Commercial fertilizers containing Ti, such as Tytanit and Mg-Titanit, have been used as biostimulants for improving crop production; however, mechanisms underlying the beneficial effects still remain unclear. In this article, we propose that the beneficial roles Ti plays in plants lie in its interaction with other nutrient elements primarily iron (Fe). Fe and Ti have synergistic and antagonistic relationships. When plants experience Fe deficiency, Ti helps induce the expression of genes related to Fe acquisition, thereby enhancing Fe uptake and utilization and subsequently improving plant growth. Plants may have proteins that either specifically or nonspecifically bind with Ti. When Ti concentration is high in plants, Ti competes with Fe for ligands or proteins. The competition could be severe, resulting in Ti phytotoxicity. As a result, the beneficial effects of Ti become more pronounced during the time when plants experience low or deficient Fe supply.
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Affiliation(s)
- Shiheng Lyu
- College of Horticulture, Fujian Agriculture and Forestry UniversityFuzhou, China
- Department of Environmental Horticulture, Mid-Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of FloridaApopka, FL, USA
| | - Xiangying Wei
- College of Horticulture, Fujian Agriculture and Forestry UniversityFuzhou, China
- Department of Environmental Horticulture, Mid-Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of FloridaApopka, FL, USA
| | - Jianjun Chen
- College of Horticulture, Fujian Agriculture and Forestry UniversityFuzhou, China
- Department of Environmental Horticulture, Mid-Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of FloridaApopka, FL, USA
- *Correspondence: Jianjun Chen
| | - Cun Wang
- Department of Environmental Horticulture, Mid-Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of FloridaApopka, FL, USA
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural SciencesDanzhou, China
| | - Xiaoming Wang
- Hunan Key Laboratory for Breeding of Clonally Propagated Forest Trees, Hunan Academy of ForestryChangsha, China
- Xiaoming Wang
| | - Dongming Pan
- College of Horticulture, Fujian Agriculture and Forestry UniversityFuzhou, China
- Dongming Pan
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Abstract
Titanium is the ninth most abundant element in the Earth's crust and some organisms sequester it avidly, though no essential biological role has yet been recognized. This Minireview addresses how the properties of titanium, especially in an oxic aqueous environment, might make a biological role difficult to recognize. It further considers how new -omic technologies might overcome the limitations of the past and help to reveal a specific role for this metal. While studies with well established model organisms have their rightful place, organisms that are known avid binders or sequesterers of titanium should be promising places to investigate a biological role.
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Affiliation(s)
- Mark R Zierden
- Department of Chemistry, Temple University, Philadelphia, PA 19122, USA.
| | - Ann M Valentine
- Department of Chemistry, Temple University, Philadelphia, PA 19122, USA.
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Hartings MR, Benjamin N, Briere F, Briscione M, Choudary O, Fisher TL, Flynn L, Ghias E, Harper M, Khamis N, Koenigsknecht C, Lazor K, Moss S, Robbins E, Schultz S, Yaman S, Haverhals LM, Trulove PC, De Long HC, Miller AE, Fox DM. Concurrent zero-dimensional and one-dimensional biomineralization of gold from a solution of Au 3+ and bovine serum albumin. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2013; 14:065004. [PMID: 27877624 PMCID: PMC5090305 DOI: 10.1088/1468-6996/14/6/065004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 10/28/2013] [Indexed: 06/06/2023]
Abstract
A technique was developed for preparing a novel material that consists of gold nanoparticles trapped within a fiber of unfolded proteins. These fibers are made in an aqueous solution that contains HAuCl4 and the protein, bovine serum albumin (BSA). By changing the ratio of gold to BSA in solution, two different types of outcomes are observed. At lower gold to BSA ratios (30-120), a purple solution results after heating the mixture at 80 °C for 4 h. At higher gold to BSA ratios (130-170), a clear solution containing purple fibers results after heating the mixture at 80 °C for 4 h. UV-Vis spectroscopy and light scattering techniques show growth in nanocolloid size as gold to BSA ratio rises above 100. Data indicate that, for the higher gold to BSA ratios, the gold is sequestered within the solid material. The material mass, visible by eye, appears to be an aggregation of smaller individual fibers. Scanning electron microscopy and transmission electron microscopy indicate that these fibers are primarily one-dimensional aggregates, which can display some branching, and can be as narrow as 400 nm in size. The likely mechanism for the synthesis of the novel material is discussed.
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Affiliation(s)
- Matthew R Hartings
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Noah Benjamin
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Floriene Briere
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Maria Briscione
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Omar Choudary
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Tamra L Fisher
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Laura Flynn
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Elizabeth Ghias
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Michaela Harper
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Nader Khamis
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Catherine Koenigsknecht
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Klare Lazor
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Steven Moss
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Elaine Robbins
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Susan Schultz
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Samiye Yaman
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Luke M Haverhals
- Department of Chemistry, US Naval Academy, Anapolis, MD 21402, USA
| | - Paul C Trulove
- Department of Chemistry, US Naval Academy, Anapolis, MD 21402, USA
| | - Hugh C De Long
- Directorate of Math, Information, and Life Sciences, US Air Force Office of Scientific Research, Arlington, VA 22203, USA
| | - Abigail E Miller
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
| | - Douglas M Fox
- Department of Chemistry, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
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