1
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Zangari M, Borelli V, Bernareggi A, Zabucchi G. Asbestos fibers promote iron oxidation and compete with apoferritin enzymatic activity. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2023; 86:69-73. [PMID: 36593716 DOI: 10.1080/15287394.2022.2164391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Asbestos fibers interact with many different proteins and may affect either their structure or functions. The aim of this study was to determine whether ferritin absorbed onto fibers might modify its ferroxidase activity. By measuring apo-ferritin ferroxidase activity, data demonstrated that ferritin in the presence of fibers did not significantly modify this enzymatic activity. However, fibers in the absence of ferritin promoted ferrous iron oxidation. Evidence suggests that asbestos fibers may promote iron oxidation and subsequently affect cellular iron homeostatic mechanisms.
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Affiliation(s)
- Martina Zangari
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Violetta Borelli
- Department of Life Sciences, University of Trieste, Trieste, Italy
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2
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Ming T, Jiang Q, Huo C, Huan H, Wu Y, Su C, Qiu X, Lu C, Zhou J, Li Y, Han J, Zhang Z, Su X. Structural Insights Into the Effects of Interactions With Iron and Copper Ions on Ferritin From the Blood Clam Tegillarca granosa. Front Mol Biosci 2022; 9:800008. [PMID: 35359603 PMCID: PMC8961696 DOI: 10.3389/fmolb.2022.800008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 01/24/2022] [Indexed: 11/13/2022] Open
Abstract
In addition to its role as an iron storage protein, ferritin can function as a major detoxification component in the innate immune defense, and Cu2+ ions can also play crucial antibacterial roles in the blood clam, Tegillarca granosa. However, the mechanism of interaction between iron and copper in recombinant Tegillarca granosa ferritin (TgFer) remains to be investigated. In this study, we investigated the crystal structure of TgFer and examined the effects of Fe2+ and Cu2+ ions on the TgFer structure and catalytic activity. The crystal structure revealed that TgFer presented a typically 4–3–2 symmetry in a cage-like, spherical shell composed of 24 identical subunits, featuring highly conserved organization in both the ferroxidase center and the 3-fold channel. Structural and biochemical analyses indicated that the 4-fold channel of TgFer could be serviced as potential binding sites of metal ions. Cu2+ ions appear to bind preferentially with the 3-fold channel as well as ferroxidase site over Fe2+ ions, possibly inhibiting the ferroxidase activity of TgFer. Our results present a structural and functional characterization of TgFer, providing mechanistic insight into the interactions between TgFer and both Fe2+ and Cu2+ ions.
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Affiliation(s)
- Tinghong Ming
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- School of Marine Science, Ningbo University, Ningbo, China
| | - Qinqin Jiang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Chunheng Huo
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- School of Marine Science, Ningbo University, Ningbo, China
| | - Hengshang Huan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Yan Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Chang Su
- Zhejiang Collaborative Innovation Center for High Value Utilization of Byproducts from Ethylene Project, Ningbo Polytechnic College, Ningbo, China
| | - Xiaoting Qiu
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Chenyang Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- School of Marine Science, Ningbo University, Ningbo, China
| | - Jun Zhou
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- School of Marine Science, Ningbo University, Ningbo, China
| | - Ye Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- School of Marine Science, Ningbo University, Ningbo, China
| | - Jiaojiao Han
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- School of Marine Science, Ningbo University, Ningbo, China
| | - Zhen Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- School of Marine Science, Ningbo University, Ningbo, China
| | - Xiurong Su
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- School of Marine Science, Ningbo University, Ningbo, China
- *Correspondence: Xiurong Su,
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3
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Tullio C, Salvioni L, Bellini M, Degrassi A, Fiandra L, D’Arienzo M, Garbujo S, Rotem R, Testa F, Prosperi D, Colombo M. Development of an Effective Tumor-Targeted Contrast Agent for Magnetic Resonance Imaging Based on Mn/H-Ferritin Nanocomplexes. ACS APPLIED BIO MATERIALS 2021; 4:7800-7810. [PMID: 34805780 PMCID: PMC8596607 DOI: 10.1021/acsabm.1c00724] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 10/08/2021] [Indexed: 11/28/2022]
Abstract
Magnetic resonance imaging (MRI) is one of the most sophisticated diagnostic tools that is routinely used in clinical practice. Contrast agents (CAs) are commonly exploited to afford much clearer images of detectable organs and to reduce the risk of misdiagnosis caused by limited MRI sensitivity. Currently, only a few gadolinium-based CAs are approved for clinical use. Concerns about their toxicity remain, and their administration is approved only under strict controls. Here, we report the synthesis and validation of a manganese-based CA, namely, Mn@HFn-RT. Manganese is an endogenous paramagnetic metal able to produce a positive contrast like gadolinium, but it is thought to result in less toxicity for the human body. Mn ions were efficiently loaded inside the shell of a recombinant H-ferritin (HFn), which is selectively recognized by the majority of human cancer cells through their transferrin receptor 1. Mn@HFn-RT was characterized, showing excellent colloidal stability, superior relaxivity, and a good safety profile. In vitro experiments confirmed the ability of Mn@HFn-RT to efficiently and selectively target breast cancer cells. In vivo, Mn@HFn-RT allowed the direct detection of tumors by positive contrast enhancement in a breast cancer murine model, using very low metal dosages and exhibiting rapid clearance after diagnosis. Hence, Mn@HFn-RT is proposed as a promising CA candidate to be developed for MRI.
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Affiliation(s)
- Chiara Tullio
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Lucia Salvioni
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Michela Bellini
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Anna Degrassi
- Preclinical
Development, Efficacy and Safety, Accelera
S.R.L.—NMS Group S.p.A., viale Pasteur 10, 20014 Nerviano, MI, Italy
| | - Luisa Fiandra
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Massimiliano D’Arienzo
- Department
of Materials Science, University of Milano-Bicocca, Via Roberto Cozzi 55, 20125 Milano, Italy
| | - Stefania Garbujo
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Rany Rotem
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Filippo Testa
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Davide Prosperi
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Miriam Colombo
- NanoBioLab,
Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
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4
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Zhang Y, Khalique A, Du X, Gao Z, Wu J, Zhang X, Zhang R, Sun Z, Liu Q, Xu Z, Midgley AC, Wang L, Yan X, Zhuang J, Kong D, Huang X. Biomimetic Design of Mitochondria-Targeted Hybrid Nanozymes as Superoxide Scavengers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2006570. [PMID: 33480459 DOI: 10.1002/adma.202006570] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/27/2020] [Indexed: 06/12/2023]
Abstract
Development of enzyme mimics for the scavenging of excessive mitochondrial superoxide (O2 •- ) can serve as an effective strategy in the treatment of many diseases. Here, protein reconstruction technology and nanotechnology is taken advantage of to biomimetically create an artificial hybrid nanozyme. These nanozymes consist of ferritin-heavy-chain-based protein as the enzyme scaffold and a metal nanoparticle core as the enzyme active center. This artificial cascade nanozyme possesses superoxide dismutase- and catalase-like activities and also targets mitochondria by overcoming multiple biological barriers. Using cardiac ischemia-reperfusion animal models, the protective advantages of the hybrid nanozymes are demonstrated in vivo during mitochondrial oxidative injury and in the recovery of heart functionality following infarction via systemic delivery and localized release from adhesive hydrogels (i.e., cardiac patch), respectively. This study illustrates a de novo design strategy in the development of enzyme mimics and provides a promising therapeutic option for alleviating oxidative damage in regenerative medicine.
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Affiliation(s)
- Yue Zhang
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, 300070, China
| | - Anila Khalique
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Xinchen Du
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Zhanxia Gao
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- School of Medicine, Nankai University, Tianjin, 300071, China
| | - Jin Wu
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- Joint Laboratory of Nanozymes, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xiangyun Zhang
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Ran Zhang
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Zhiyuan Sun
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Qiqi Liu
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Zhelong Xu
- Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, 300070, China
| | - Adam C Midgley
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Lianyong Wang
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Xiyun Yan
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- Joint Laboratory of Nanozymes, College of Life Sciences, Nankai University, Tianjin, 300071, China
- CAS Engineering Laboratory for Nanozymes, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jie Zhuang
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- School of Medicine, Nankai University, Tianjin, 300071, China
- Joint Laboratory of Nanozymes, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Deling Kong
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
| | - Xinglu Huang
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, China
- Joint Laboratory of Nanozymes, College of Life Sciences, Nankai University, Tianjin, 300071, China
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5
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Ardini M, Bellelli A, Williams DL, Di Leandro L, Giansanti F, Cimini A, Ippoliti R, Angelucci F. Taking Advantage of the Morpheein Behavior of Peroxiredoxin in Bionanotechnology. Bioconjug Chem 2021; 32:43-62. [PMID: 33411522 PMCID: PMC8023583 DOI: 10.1021/acs.bioconjchem.0c00621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
![]()
Morpheeins
are proteins that reversibly assemble into different
oligomers, whose architectures are governed by conformational changes
of the subunits. This property could be utilized in bionanotechnology
where the building of nanometric and new high-ordered structures is
required. By capitalizing on the adaptability of morpheeins to create
patterned structures and exploiting their inborn affinity toward inorganic
and living matter, “bottom-up” creation of nanostructures
could be achieved using a single protein building block, which may
be useful as such or as scaffolds for more complex materials. Peroxiredoxins
represent the paradigm of a morpheein that can be applied to bionanotechnology.
This review describes the structural and functional transitions that
peroxiredoxins undergo to form high-order oligomers, e.g., rings,
tubes, particles, and catenanes, and reports on the chemical and genetic
engineering approaches to employ them in the generation of responsive
nanostructures and nanodevices. The usefulness of the morpheeins’
behavior is emphasized, supporting their use in future applications.
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Affiliation(s)
- Matteo Ardini
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Andrea Bellelli
- Department of Biochemical Sciences "A. Rossi Fanelli", University of Roma "Sapienza", Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - David L Williams
- Department of Microbial Pathogens and Immunity, Rush University Medical Center, Chicago, Illinois 60612, United States
| | - Luana Di Leandro
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Francesco Giansanti
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Annamaria Cimini
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Rodolfo Ippoliti
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
| | - Francesco Angelucci
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy
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6
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Huan H, Jiang Q, Wu Y, Qiu X, Lu C, Su C, Zhou J, Li Y, Ming T, Su X. Structure determination of ferritin from Dendrorhynchus zhejiangensis. Biochem Biophys Res Commun 2020; 531:195-202. [PMID: 32792196 DOI: 10.1016/j.bbrc.2020.07.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 11/26/2022]
Abstract
Ferritin is an important hub of iron metabolism because it stores iron during times of iron overload and releases iron during iron deficiency. Here, we present the first crystal structure of ferritin from the marine invertebrate Dendrorhynchus zhejiangensis with a 2.3 Å resolution. D. zhejiangensis ferritin (DzFer) exhibits a common cage-shaped hollow sphere with 24 subunits containing the ferroxidase centers and 3-fold and 4-fold channels. The structure of DzFer shows highly conserved catalytic residues in the ferroxidase center. The metal wire formed by ferrous ions in the 3-fold channel reveals the path that iron ions use to enter and translocate into the ferroxidase site to be oxidized and finally arrive at the nucleation site. However, the electrostatic environment of the channels and pores exhibits significant and extensive variability, suggesting that ferritins execute diverse functions in different environments.
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Affiliation(s)
- Hengshang Huan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang, 315211, China; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang, 315823, China
| | - Qinqin Jiang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang, 315211, China; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang, 315823, China
| | - Yan Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang, 315211, China; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang, 315823, China
| | - Xiaoting Qiu
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang, 315823, China
| | - Chenyang Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang, 315211, China; School of Marine Science, Ningbo University, Ningbo, Zhejiang, 315823, China
| | - Chang Su
- Zhejiang Collaborative Innovation Center for High Value Utilization of Byproducts from Ethylene Project, Ningbo Polytechnic, Ningbo, Zhejiang, 315800, China
| | - Jun Zhou
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang, 315211, China; School of Marine Science, Ningbo University, Ningbo, Zhejiang, 315823, China
| | - Ye Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang, 315211, China; School of Marine Science, Ningbo University, Ningbo, Zhejiang, 315823, China
| | - Tinghong Ming
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang, 315211, China; School of Marine Science, Ningbo University, Ningbo, Zhejiang, 315823, China.
| | - Xiurong Su
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang, 315211, China; School of Marine Science, Ningbo University, Ningbo, Zhejiang, 315823, China.
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7
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A ring-shaped protein clusters gold nanoparticles acting as molecular scaffold for plasmonic surfaces. Biochim Biophys Acta Gen Subj 2020; 1864:129617. [DOI: 10.1016/j.bbagen.2020.129617] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 04/09/2020] [Accepted: 04/12/2020] [Indexed: 12/18/2022]
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8
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Szulc DA, Lee XA, Cheng HYM, Cheng HLM. Bright Ferritin-a Reporter Gene Platform for On-Demand, Longitudinal Cell Tracking on MRI. iScience 2020; 23:101350. [PMID: 32707432 PMCID: PMC7381694 DOI: 10.1016/j.isci.2020.101350] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/14/2020] [Accepted: 07/03/2020] [Indexed: 02/02/2023] Open
Abstract
A major unresolved challenge in cell-based regenerative medicine is the absence of non-invasive technologies for tracking cell fate in deep tissue and with high spatial resolution over an extended interval. MRI is highly suited for this task, but current methods fail to provide longitudinal monitoring or high sensitivity, or both. In this study, we fill this technological gap with the first discovery and demonstration of in vivo cellular production of endogenous bright contrast via an MRI genetic reporter system that forms manganese-ferritin nanoparticles. We demonstrate this technology in human embryonic kidney cells genetically modified to stably overexpress ferritin and show that, in the presence of manganese, these cells produce far greater contrast than conventional ferritin overexpression with iron or manganese-permeable cells. In living mice, diffusely implanted bright-ferritin cells produce the highest and most sustained contrast in skeletal muscle. The bright-ferritin platform has potential for on-demand, longitudinal, and sensitive cell tracking in vivo.
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Affiliation(s)
- Daniel A Szulc
- Institute of Biomedical Engineering, University of Toronto, 164 College Street, RS407, Toronto, ON M5S 3G9, Canada; Ted Rogers Centre for Heart Research, Translational Biology & Engineering Program, University of Toronto, Toronto, ON M5G 1M1, Canada
| | - Xavier A Lee
- Ted Rogers Centre for Heart Research, Translational Biology & Engineering Program, University of Toronto, Toronto, ON M5G 1M1, Canada; Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Hai-Ying Mary Cheng
- Department of Biology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada
| | - Hai-Ling Margaret Cheng
- Institute of Biomedical Engineering, University of Toronto, 164 College Street, RS407, Toronto, ON M5S 3G9, Canada; Ted Rogers Centre for Heart Research, Translational Biology & Engineering Program, University of Toronto, Toronto, ON M5G 1M1, Canada; The Edward S. Rogers Sr. Department of Electrical & Computer Engineering, University of Toronto, Toronto, ON M5S 3G4, Canada.
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9
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The Manganese-Responsive Transcriptional Regulator MumR Protects Acinetobacter baumannii from Oxidative Stress. Infect Immun 2020; 88:IAI.00762-19. [PMID: 31792075 DOI: 10.1128/iai.00762-19] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 11/25/2019] [Indexed: 11/20/2022] Open
Abstract
Acinetobacter baumannii is an emerging opportunistic pathogen that primarily infects critically ill patients in nosocomial settings. Because of its rapid acquisition of antibiotic resistance, infections caused by A. baumannii have become extremely difficult to treat, underlying the importance of identifying new antimicrobial targets for this pathogen. Manganese (Mn) is an essential nutrient metal required for a number of bacterial processes, including the response to oxidative stress. Here, we show that exogenous Mn can restore A. baumannii viability in the presence of reactive oxygen species (ROS). This restoration is not dependent on the high-affinity Nramp family Mn transporter, MumT, as a ΔmumT mutant is no more sensitive to hydrogen peroxide (H2O2) killing than wild-type A. baumannii However, mumR, which encodes the transcriptional regulator of mumT, is critical for growth and survival in the presence of H2O2, suggesting that MumR regulates additional genes that contribute to H2O2 resistance. RNA sequencing revealed a role for mumR in regulating the activity of a number of metabolic pathways, including two pathways, phenylacetate and gamma-aminobutyric acid catabolism, which were found to be important for resisting killing by H2O2 Finally, ΔmumR exhibited reduced fitness in a murine model of pneumonia, indicating that MumR-regulated gene products are crucial for protection against the host immune response. In summary, these results suggest that MumR facilitates resistance to the host immune response by activating a transcriptional program that is critical for surviving both Mn starvation and oxidative stress.
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10
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Hypoxia-tropic nanozymes as oxygen generators for tumor-favoring theranostics. Biomaterials 2019; 230:119635. [PMID: 31767443 DOI: 10.1016/j.biomaterials.2019.119635] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/22/2019] [Accepted: 11/16/2019] [Indexed: 12/16/2022]
Abstract
Oxygen deficiency is the main obstacle of hypoxia-related theranostics, thus this is a considerable amount of research focusing on the development of methods to supply oxygen by taking advantage of hypoxia-responsive properties of nanoparticles. However, strategies to properly penetrate hypoxic regions by the nanoparticles remains an unmet challenge. In this work, a biomimetic nanozyme capable of possessing catalase-like activity and the efficient direct penetration of hypoxic areas in tumor tissues was developed to supply oxygen based on catalytic tumor microenvironment-responsive reaction, providing substantial tumor hypoxia relief with nearly 3-fold reduction compared to untreated tumor tissues. To demonstrate the advantages of the nanozymes in overcoming hypoxia, a theranostic nanosystem model composed of the core/shell nanozymes and aggregation-induced emission (AIE) molecules was designed. The nanosystem was able to present multi-modal imaging of tumors and modulated the tumor microenvironment for improved photodynamic therapy (PDT) by cascade reactions of therapeutic effector molecules, thereby providing significantly enhanced therapeutic benefits in inhibiting tumor growth and lung metastasis of orthotopic breast cancer. This conceptual study showed the multifaceted features of biomimetic nanozymes as tumor therapeutics and demonstrated the encouraging potential for modulating hypoxia as an application for tumor theranostics.
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11
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Li Q, Hu C, Lin J, Yang Z, Zhou Q, Yang R, Yuan H, Zhu X, Lv Y, Liang Q, Lv Z, Sun L, Zhang Y. Urinary ionomic analysis reveals new relationship between minerals and longevity in a Han Chinese population. J Trace Elem Med Biol 2019; 53:69-75. [PMID: 30910209 DOI: 10.1016/j.jtemb.2019.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 01/18/2019] [Accepted: 02/11/2019] [Indexed: 12/14/2022]
Abstract
Human longevity involves genetic, nutritional, environmental and many other factors playing a key role in healthy aging. Previous studies have shown that mineral metabolism and homeostasis are associated with lifespan extension. However, the majority of them have focused on a limited number of elements and ignored the complex relationship between them. In this study, we carried out a network-based approach to investigate the urinary ionome of nonagenarians and centenarians (longevity group) when compared with their biologically unrelated and younger family members (control group) from a Han Chinese population. Several differentially changed elements were identified, almost all of which showed an elevated level in the longevity group. Correlation analysis of the ionome revealed significant element-element interactions in each group. We then divided each group into distinct subgroups according to age ranges, and built the elemental correlation network for each of them. Significant elemental correlations and correlation changes involving all examined elements were identified within or between different subgroups, implying a highly dynamic and complex crosstalk among the elements during human life. Finally, more similar elemental patterns were observed between extremely old and middle-aged people. Overall, our data reveal new relationship between urinary minerals and human longevity, which may extend our understanding of the mechanism of healthy aging.
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Affiliation(s)
- Qingxiu Li
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, Brain Disease and Big Data Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, Guangdong, PR China; The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, PR China
| | - Caiyou Hu
- Department of Neurology, Jiangbin Hospital, Nanning 530021, Guangxi, PR China
| | - Jie Lin
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, Brain Disease and Big Data Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, Guangdong, PR China
| | - Ze Yang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, PR China
| | - Qi Zhou
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, PR China
| | - Ruiyue Yang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, PR China
| | - Huiping Yuan
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, PR China
| | - Xiaoquan Zhu
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, PR China
| | - Yuan Lv
- Department of Neurology, Jiangbin Hospital, Nanning 530021, Guangxi, PR China
| | - Qinghua Liang
- Department of Neurology, Jiangbin Hospital, Nanning 530021, Guangxi, PR China
| | - Zeping Lv
- Department of Neurology, Jiangbin Hospital, Nanning 530021, Guangxi, PR China
| | - Liang Sun
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, PR China.
| | - Yan Zhang
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, Brain Disease and Big Data Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, Guangdong, PR China.
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12
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Transition metals and host-microbe interactions in the inflamed intestine. Biometals 2019; 32:369-384. [PMID: 30788645 DOI: 10.1007/s10534-019-00182-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 02/10/2019] [Indexed: 12/12/2022]
Abstract
Host-associated microbial communities provide critical functions for their hosts. Transition metals are essential for both the mammalian host and the majority of commensal bacteria. As such, access to transition metals is an important component of host-microbe interactions in the gastrointestinal tract. In mammals, transition metal ions are often sequestered by metal binding proteins to limit microbial access under homeostatic conditions. In response to invading pathogens, the mammalian host further decreases availability of these micronutrients by regulating their trafficking or releasing high-affinity metal chelating proteins, a process termed nutritional immunity. Bacterial pathogens have evolved several mechanisms to subvert nutritional immunity. Here, we provide an overview on how metal ion availability shapes host-microbe interactions in the gut with a particular focus on intestinal inflammatory diseases.
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